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wine/dlls/crypt32/decode.c
Alexandre Julliard febb06ce77 crypt32: Use nameless union/structs.
2023-07-05 17:03:30 +02:00

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/*
* Copyright 2005-2009 Juan Lang
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* This file implements ASN.1 DER decoding of a limited set of types.
* It isn't a full ASN.1 implementation. Microsoft implements BER
* encoding of many of the basic types in msasn1.dll, but that interface isn't
* implemented, so I implement them here.
*
* References:
* "A Layman's Guide to a Subset of ASN.1, BER, and DER", by Burton Kaliski
* (available online, look for a PDF copy as the HTML versions tend to have
* translation errors.)
*
* RFC3280, http://www.faqs.org/rfcs/rfc3280.html
*
* MSDN, especially "Constants for CryptEncodeObject and CryptDecodeObject"
*/
#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include "windef.h"
#include "winbase.h"
#include "wincrypt.h"
#include "winnls.h"
#include "snmp.h"
#include "wine/debug.h"
#include "wine/exception.h"
#include "crypt32_private.h"
/* This is a bit arbitrary, but to set some limit: */
#define MAX_ENCODED_LEN 0x04000000
#define ASN_FLAGS_MASK 0xe0
#define ASN_TYPE_MASK 0x1f
WINE_DEFAULT_DEBUG_CHANNEL(cryptasn);
WINE_DECLARE_DEBUG_CHANNEL(crypt);
void CRYPT_CopyReversed(BYTE *dst, const BYTE *src, size_t len)
{
DWORD i;
for (i = 0; i < len; i++) {
dst[len - i - 1] = src[i];
}
}
typedef BOOL (WINAPI *CryptDecodeObjectFunc)(DWORD, LPCSTR, const BYTE *,
DWORD, DWORD, void *, DWORD *);
typedef BOOL (WINAPI *CryptDecodeObjectExFunc)(DWORD, LPCSTR, const BYTE *,
DWORD, DWORD, PCRYPT_DECODE_PARA, void *, DWORD *);
/* Internal decoders don't do memory allocation or exception handling, and
* they report how many bytes they decoded.
*/
typedef BOOL (*InternalDecodeFunc)(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded);
static BOOL CRYPT_AsnDecodeChoiceOfTimeInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded);
static BOOL CRYPT_AsnDecodePubKeyInfoInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded);
/* Assumes pvStructInfo is a CERT_EXTENSION whose pszObjId is set ahead of time.
*/
static BOOL CRYPT_AsnDecodeExtension(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded);
/* Assumes algo->Parameters.pbData is set ahead of time. */
static BOOL CRYPT_AsnDecodeAlgorithmId(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded);
static BOOL CRYPT_AsnDecodeBool(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded);
/* Assumes the CRYPT_DATA_BLOB's pbData member has been initialized */
static BOOL CRYPT_AsnDecodeOctets(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded);
/* Doesn't check the tag, assumes the caller does so */
static BOOL CRYPT_AsnDecodeBitsInternal(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded);
static BOOL CRYPT_AsnDecodeIntInternal(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded);
/* Like CRYPT_AsnDecodeInteger, but assumes the CRYPT_INTEGER_BLOB's pbData
* member has been initialized, doesn't do exception handling, and doesn't do
* memory allocation. Also doesn't check tag, assumes the caller has checked
* it.
*/
static BOOL CRYPT_AsnDecodeIntegerInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded);
/* Like CRYPT_AsnDecodeInteger, but unsigned. */
static BOOL CRYPT_AsnDecodeUnsignedIntegerInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded);
static BOOL CRYPT_AsnDecodePKCSAttributeInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded);
/* Gets the number of length bytes from the given (leading) length byte */
#define GET_LEN_BYTES(b) ((b) <= 0x80 ? 1 : 1 + ((b) & 0x7f))
/* Helper function to get the encoded length of the data starting at pbEncoded,
* where pbEncoded[0] is the tag. If the data are too short to contain a
* length or if the length is too large for cbEncoded, sets an appropriate
* error code and returns FALSE. If the encoded length is unknown due to
* indefinite length encoding, *len is set to CMSG_INDEFINITE_LENGTH.
*/
static BOOL CRYPT_GetLengthIndefinite(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD *len)
{
BOOL ret;
if (cbEncoded <= 1)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else if (pbEncoded[1] <= 0x7f)
{
if (pbEncoded[1] + 1 > cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
ret = FALSE;
}
else
{
*len = pbEncoded[1];
ret = TRUE;
}
}
else if (pbEncoded[1] == 0x80)
{
*len = CMSG_INDEFINITE_LENGTH;
ret = TRUE;
}
else
{
BYTE lenLen = GET_LEN_BYTES(pbEncoded[1]);
if (lenLen > sizeof(DWORD) + 1)
{
SetLastError(CRYPT_E_ASN1_LARGE);
ret = FALSE;
}
else if (lenLen + 2 > cbEncoded)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
{
DWORD out = 0;
pbEncoded += 2;
while (--lenLen)
{
out <<= 8;
out |= *pbEncoded++;
}
if (out + lenLen + 1 > cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
ret = FALSE;
}
else
{
*len = out;
ret = TRUE;
}
}
}
return ret;
}
/* Like CRYPT_GetLengthIndefinite, but disallows indefinite-length encoding. */
static BOOL CRYPT_GetLen(const BYTE *pbEncoded, DWORD cbEncoded, DWORD *len)
{
BOOL ret;
if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded, len)) &&
*len == CMSG_INDEFINITE_LENGTH)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
return ret;
}
/* Helper function to check *pcbStructInfo, set it to the required size, and
* optionally to allocate memory. Assumes pvStructInfo is not NULL.
* If CRYPT_DECODE_ALLOC_FLAG is set in dwFlags, *pvStructInfo will be set to a
* pointer to the newly allocated memory.
*/
static BOOL CRYPT_DecodeEnsureSpace(DWORD dwFlags,
const CRYPT_DECODE_PARA *pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD bytesNeeded)
{
BOOL ret = TRUE;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
{
if (pDecodePara && pDecodePara->pfnAlloc)
*(BYTE **)pvStructInfo = pDecodePara->pfnAlloc(bytesNeeded);
else
*(BYTE **)pvStructInfo = LocalAlloc(LPTR, bytesNeeded);
if (!*(BYTE **)pvStructInfo)
ret = FALSE;
else
*pcbStructInfo = bytesNeeded;
}
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
*pcbStructInfo = bytesNeeded;
return ret;
}
static void CRYPT_FreeSpace(const CRYPT_DECODE_PARA *pDecodePara, LPVOID pv)
{
if (pDecodePara && pDecodePara->pfnFree)
pDecodePara->pfnFree(pv);
else
LocalFree(pv);
}
/* Helper function to check *pcbStructInfo and set it to the required size.
* Assumes pvStructInfo is not NULL.
*/
static BOOL CRYPT_DecodeCheckSpace(DWORD *pcbStructInfo, DWORD bytesNeeded)
{
BOOL ret;
if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pcbStructInfo = bytesNeeded;
ret = TRUE;
}
return ret;
}
/* tag:
* The expected tag of the item. If tag is 0, decodeFunc is called
* regardless of the tag value seen.
* offset:
* A sequence is decoded into a struct. The offset member is the
* offset of this item within that struct.
* decodeFunc:
* The decoder function to use. If this is NULL, then the member isn't
* decoded, but minSize space is reserved for it.
* minSize:
* The minimum amount of space occupied after decoding. You must set this.
* optional:
* If true, and the tag doesn't match the expected tag for this item,
* or the decodeFunc fails with CRYPT_E_ASN1_BADTAG, then minSize space is
* filled with 0 for this member.
* hasPointer, pointerOffset:
* If the item has dynamic data, set hasPointer to TRUE, pointerOffset to
* the offset within the struct of the data pointer (or to the
* first data pointer, if more than one exist).
* size:
* Used by CRYPT_AsnDecodeSequence, not for your use.
*/
struct AsnDecodeSequenceItem
{
BYTE tag;
DWORD offset;
InternalDecodeFunc decodeFunc;
DWORD minSize;
BOOL optional;
BOOL hasPointer;
DWORD pointerOffset;
DWORD size;
};
#define FINALMEMBERSIZE(s, member) (sizeof(s) - offsetof(s, member))
#define MEMBERSIZE(s, member, nextmember) \
(offsetof(s, nextmember) - offsetof(s, member))
/* Decodes the items in a sequence, where the items are described in items,
* the encoded data are in pbEncoded with length cbEncoded. Decodes into
* pvStructInfo. nextData is a pointer to the memory location at which the
* first decoded item with a dynamic pointer should point.
* Upon decoding, *cbDecoded is the total number of bytes decoded.
* Each item decoder is never called with CRYPT_DECODE_ALLOC_FLAG set.
*/
static BOOL CRYPT_AsnDecodeSequenceItems(struct AsnDecodeSequenceItem items[],
DWORD cItem, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
void *pvStructInfo, BYTE *nextData, DWORD *cbDecoded)
{
BOOL ret;
DWORD i, decoded = 0;
const BYTE *ptr = pbEncoded;
TRACE("%p, %ld, %p, %ld, %08lx, %p, %p, %p\n", items, cItem, pbEncoded,
cbEncoded, dwFlags, pvStructInfo, nextData, cbDecoded);
for (i = 0, ret = TRUE; ret && i < cItem; i++)
{
if (cbEncoded - (ptr - pbEncoded) != 0)
{
DWORD itemLen;
if ((ret = CRYPT_GetLengthIndefinite(ptr,
cbEncoded - (ptr - pbEncoded), &itemLen)))
{
BYTE itemLenBytes = GET_LEN_BYTES(ptr[1]);
if (ptr[0] == items[i].tag || !items[i].tag)
{
DWORD itemEncodedLen;
if (itemLen == CMSG_INDEFINITE_LENGTH)
itemEncodedLen = cbEncoded - (ptr - pbEncoded);
else
itemEncodedLen = 1 + itemLenBytes + itemLen;
if (nextData && pvStructInfo && items[i].hasPointer)
{
TRACE("Setting next pointer to %p\n",
nextData);
*(BYTE **)((BYTE *)pvStructInfo +
items[i].pointerOffset) = nextData;
}
if (items[i].decodeFunc)
{
DWORD itemDecoded;
if (pvStructInfo)
TRACE("decoding item %ld\n", i);
else
TRACE("sizing item %ld\n", i);
ret = items[i].decodeFunc(ptr, itemEncodedLen,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG,
pvStructInfo ? (BYTE *)pvStructInfo + items[i].offset
: NULL, &items[i].size, &itemDecoded);
if (ret)
{
if (items[i].size < items[i].minSize)
items[i].size = items[i].minSize;
else if (items[i].size > items[i].minSize)
{
/* Account for alignment padding */
items[i].size = ALIGN_DWORD_PTR(items[i].size);
}
TRACE("item %ld size: %ld\n", i, items[i].size);
if (nextData && items[i].hasPointer &&
items[i].size > items[i].minSize)
nextData += items[i].size - items[i].minSize;
if (itemDecoded > itemEncodedLen)
{
WARN("decoded length %ld exceeds encoded %ld\n",
itemDecoded, itemEncodedLen);
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
{
ptr += itemDecoded;
decoded += itemDecoded;
TRACE("item %ld: decoded %ld bytes\n", i,
itemDecoded);
}
}
else if (items[i].optional &&
GetLastError() == CRYPT_E_ASN1_BADTAG)
{
TRACE("skipping optional item %ld\n", i);
items[i].size = items[i].minSize;
SetLastError(NOERROR);
ret = TRUE;
}
else
TRACE("item %ld failed: %08lx\n", i,
GetLastError());
}
else if (itemLen == CMSG_INDEFINITE_LENGTH)
{
ERR("can't use indefinite length encoding without a decoder\n");
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
{
TRACE("item %ld: decoded %ld bytes\n", i, itemEncodedLen);
ptr += itemEncodedLen;
decoded += itemEncodedLen;
items[i].size = items[i].minSize;
}
}
else if (items[i].optional)
{
TRACE("skipping optional item %ld\n", i);
items[i].size = items[i].minSize;
}
else
{
TRACE("item %ld: tag %02x doesn't match expected %02x\n",
i, ptr[0], items[i].tag);
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
}
}
else if (items[i].optional)
{
TRACE("missing optional item %ld, skipping\n", i);
items[i].size = items[i].minSize;
}
else
{
TRACE("not enough bytes for item %ld, failing\n", i);
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
}
if (cbDecoded)
*cbDecoded = decoded;
TRACE("returning %d\n", ret);
return ret;
}
/* This decodes an arbitrary sequence into a contiguous block of memory
* (basically, a struct.) Each element being decoded is described by a struct
* AsnDecodeSequenceItem, see above.
* startingPointer is an optional pointer to the first place where dynamic
* data will be stored. If you know the starting offset, you may pass it
* here. Otherwise, pass NULL, and one will be inferred from the items.
*/
static BOOL CRYPT_AsnDecodeSequence(struct AsnDecodeSequenceItem items[],
DWORD cItem, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded, void *startingPointer)
{
BOOL ret;
TRACE("%p, %ld, %p, %ld, %08lx, %p, %p, %ld, %p\n", items, cItem, pbEncoded,
cbEncoded, dwFlags, pDecodePara, pvStructInfo, *pcbStructInfo,
startingPointer);
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
if (pbEncoded[0] == ASN_SEQUENCE)
{
DWORD dataLen;
if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded, &dataLen)))
{
DWORD lenBytes = GET_LEN_BYTES(pbEncoded[1]), cbDecoded;
const BYTE *ptr = pbEncoded + 1 + lenBytes;
BOOL indefinite = FALSE;
cbEncoded -= 1 + lenBytes;
if (dataLen == CMSG_INDEFINITE_LENGTH)
{
dataLen = cbEncoded;
indefinite = TRUE;
lenBytes += 2;
}
else if (cbEncoded < dataLen)
{
TRACE("dataLen %ld exceeds cbEncoded %ld, failing\n", dataLen,
cbEncoded);
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
if (ret)
{
ret = CRYPT_AsnDecodeSequenceItems(items, cItem,
ptr, dataLen, dwFlags, NULL, NULL, &cbDecoded);
if (ret && dataLen == CMSG_INDEFINITE_LENGTH)
{
if (cbDecoded > cbEncoded - 2)
{
/* Not enough space for 0 TLV */
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else if (*(ptr + cbDecoded) != 0 ||
*(ptr + cbDecoded + 1) != 0)
{
TRACE("expected 0 TLV\n");
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
cbDecoded += 2;
}
}
if (ret && !indefinite && cbDecoded != dataLen)
{
TRACE("expected %ld decoded, got %ld, failing\n", dataLen,
cbDecoded);
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
if (ret)
{
DWORD i, bytesNeeded = 0, structSize = 0;
for (i = 0; i < cItem; i++)
{
if (items[i].size > items[i].minSize)
bytesNeeded += items[i].size - items[i].minSize;
structSize = max( structSize, items[i].offset + items[i].minSize );
}
bytesNeeded += structSize;
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + cbDecoded;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, bytesNeeded)))
{
BYTE *nextData;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
if (startingPointer)
nextData = startingPointer;
else
nextData = (BYTE *)pvStructInfo + structSize;
memset(pvStructInfo, 0, structSize);
ret = CRYPT_AsnDecodeSequenceItems(items, cItem,
ptr, dataLen, dwFlags, pvStructInfo, nextData,
&cbDecoded);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, pvStructInfo);
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
TRACE("returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
/* tag:
* The expected tag of the entire encoded array (usually a variant
* of ASN_SETOF or ASN_SEQUENCEOF.) If tag is 0, decodeFunc is called
* regardless of the tag seen.
* countOffset:
* The offset within the outer structure at which the count exists.
* For example, a structure such as CRYPT_ATTRIBUTES has countOffset == 0,
* while CRYPT_ATTRIBUTE has countOffset ==
* offsetof(CRYPT_ATTRIBUTE, cValue).
* arrayOffset:
* The offset within the outer structure at which the array pointer exists.
* For example, CRYPT_ATTRIBUTES has arrayOffset ==
* offsetof(CRYPT_ATTRIBUTES, rgAttr).
* minArraySize:
* The minimum size of the decoded array. On WIN32, this is always 8:
* sizeof(DWORD) + sizeof(void *). On WIN64, it can be larger due to
* alignment.
* decodeFunc:
* used to decode each item in the array
* itemSize:
* is the minimum size of each decoded item
* hasPointer:
* indicates whether each item has a dynamic pointer
* pointerOffset:
* indicates the offset within itemSize at which the pointer exists
*/
struct AsnArrayDescriptor
{
BYTE tag;
DWORD countOffset;
DWORD arrayOffset;
DWORD minArraySize;
InternalDecodeFunc decodeFunc;
DWORD itemSize;
BOOL hasPointer;
DWORD pointerOffset;
};
struct AsnArrayItemSize
{
DWORD encodedLen;
DWORD size;
};
/* Decodes an array of like types into a structure described by a struct
* AsnArrayDescriptor.
*/
static BOOL CRYPT_AsnDecodeArray(const struct AsnArrayDescriptor *arrayDesc,
const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
const CRYPT_DECODE_PARA *pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
TRACE("%p, %p, %ld, %p, %ld\n", arrayDesc, pbEncoded,
cbEncoded, pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
ret = FALSE;
}
else if (!arrayDesc->tag || pbEncoded[0] == arrayDesc->tag)
{
DWORD dataLen;
if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded, &dataLen)))
{
DWORD bytesNeeded = arrayDesc->minArraySize, cItems = 0, capacity = 0, decoded;
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
/* There can be arbitrarily many items, but there is often only one.
*/
struct AsnArrayItemSize itemSize = { 0 }, *itemSizes = &itemSize;
decoded = 1 + lenBytes;
if (dataLen)
{
const BYTE *ptr;
BOOL doneDecoding = FALSE;
for (ptr = pbEncoded + 1 + lenBytes; ret && !doneDecoding; )
{
if (dataLen == CMSG_INDEFINITE_LENGTH)
{
if (ptr[0] == 0)
{
doneDecoding = TRUE;
if (ptr[1] != 0)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
decoded += 2;
}
}
else if (ptr - pbEncoded - 1 - lenBytes >= dataLen)
doneDecoding = TRUE;
if (!doneDecoding)
{
DWORD itemEncoded, itemDataLen, itemDecoded, size = 0;
/* Each item decoded may not tolerate extraneous bytes,
* so get the length of the next element if known.
*/
if ((ret = CRYPT_GetLengthIndefinite(ptr,
cbEncoded - (ptr - pbEncoded), &itemDataLen)))
{
if (itemDataLen == CMSG_INDEFINITE_LENGTH)
itemEncoded = cbEncoded - (ptr - pbEncoded);
else
itemEncoded = 1 + GET_LEN_BYTES(ptr[1]) +
itemDataLen;
}
if (ret)
ret = arrayDesc->decodeFunc(ptr, itemEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &size,
&itemDecoded);
if (ret)
{
/* Ignore an item that failed to decode but the decoder doesn't want to fail the whole process */
if (!size)
{
ptr += itemEncoded;
continue;
}
if (++cItems <= 1)
itemSizes = &itemSize;
else if (itemSizes == &itemSize)
{
capacity = 1024;
itemSizes = CryptMemAlloc(capacity * sizeof(struct AsnArrayItemSize));
if (itemSizes) *itemSizes = itemSize;
}
else if (cItems > capacity)
{
capacity = capacity * 3 / 2;
itemSizes = CryptMemRealloc(itemSizes, capacity * sizeof(struct AsnArrayItemSize));
}
if (itemSizes)
{
decoded += itemDecoded;
itemSizes[cItems - 1].encodedLen = itemEncoded;
itemSizes[cItems - 1].size = size;
bytesNeeded += size;
ptr += itemEncoded;
}
else
ret = FALSE;
}
}
}
}
if (ret)
{
if (pcbDecoded)
*pcbDecoded = decoded;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
DWORD i, *pcItems;
BYTE *nextData;
const BYTE *ptr;
void *rgItems;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(void **)pvStructInfo;
pcItems = pvStructInfo;
*pcItems = cItems;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
{
rgItems = (BYTE *)pvStructInfo +
arrayDesc->minArraySize;
*(void **)((BYTE *)pcItems -
arrayDesc->countOffset + arrayDesc->arrayOffset) =
rgItems;
}
else
rgItems = *(void **)((BYTE *)pcItems -
arrayDesc->countOffset + arrayDesc->arrayOffset);
nextData = (BYTE *)rgItems + cItems * arrayDesc->itemSize;
for (i = 0, ptr = pbEncoded + 1 + lenBytes; ret &&
i < cItems && ptr - pbEncoded - 1 - lenBytes <
dataLen; i++)
{
DWORD itemDecoded;
if (arrayDesc->hasPointer)
*(BYTE **)((BYTE *)rgItems + i * arrayDesc->itemSize
+ arrayDesc->pointerOffset) = nextData;
ret = arrayDesc->decodeFunc(ptr,
itemSizes[i].encodedLen,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG,
(BYTE *)rgItems + i * arrayDesc->itemSize,
&itemSizes[i].size, &itemDecoded);
if (ret)
{
nextData += itemSizes[i].size - arrayDesc->itemSize;
ptr += itemDecoded;
}
}
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, pvStructInfo);
}
}
if (itemSizes != &itemSize)
CryptMemFree(itemSizes);
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
return ret;
}
/* Decodes a DER-encoded BLOB into a CRYPT_DER_BLOB struct pointed to by
* pvStructInfo. The BLOB must be non-empty, otherwise the last error is set
* to CRYPT_E_ASN1_CORRUPT.
* Warning: assumes the CRYPT_DER_BLOB pointed to by pvStructInfo has pbData
* set!
*/
static BOOL CRYPT_AsnDecodeDerBlob(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD bytesNeeded = sizeof(CRYPT_DER_BLOB);
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += 1 + lenBytes + dataLen;
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeCheckSpace(pcbStructInfo, bytesNeeded)))
{
CRYPT_DER_BLOB *blob;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
blob = pvStructInfo;
blob->cbData = 1 + lenBytes + dataLen;
if (blob->cbData)
{
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
blob->pbData = (BYTE *)pbEncoded;
else
{
assert(blob->pbData);
memcpy(blob->pbData, pbEncoded, blob->cbData);
}
}
else
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
}
}
return ret;
}
/* Like CRYPT_AsnDecodeBitsInternal, but swaps the bytes */
static BOOL CRYPT_AsnDecodeBitsSwapBytes(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
TRACE("(%p, %ld, 0x%08lx, %p, %ld, %p)\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
/* Can't use the CRYPT_DECODE_NOCOPY_FLAG, because we modify the bytes in-
* place.
*/
ret = CRYPT_AsnDecodeBitsInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_NOCOPY_FLAG, pvStructInfo, pcbStructInfo,
pcbDecoded);
if (ret && pvStructInfo)
{
CRYPT_BIT_BLOB *blob = pvStructInfo;
if (blob->cbData)
{
DWORD i;
BYTE temp;
for (i = 0; i < blob->cbData / 2; i++)
{
temp = blob->pbData[i];
blob->pbData[i] = blob->pbData[blob->cbData - i - 1];
blob->pbData[blob->cbData - i - 1] = temp;
}
}
}
TRACE("returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCertSignedContent(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ 0, offsetof(CERT_SIGNED_CONTENT_INFO, ToBeSigned),
CRYPT_AsnDecodeDerBlob, sizeof(CRYPT_DER_BLOB), FALSE, TRUE,
offsetof(CERT_SIGNED_CONTENT_INFO, ToBeSigned.pbData), 0 },
{ ASN_SEQUENCEOF, offsetof(CERT_SIGNED_CONTENT_INFO,
SignatureAlgorithm), CRYPT_AsnDecodeAlgorithmId,
sizeof(CRYPT_ALGORITHM_IDENTIFIER), FALSE, TRUE,
offsetof(CERT_SIGNED_CONTENT_INFO, SignatureAlgorithm.pszObjId), 0 },
{ ASN_BITSTRING, offsetof(CERT_SIGNED_CONTENT_INFO, Signature),
CRYPT_AsnDecodeBitsSwapBytes, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
offsetof(CERT_SIGNED_CONTENT_INFO, Signature.pbData), 0 },
};
if (dwFlags & CRYPT_DECODE_NO_SIGNATURE_BYTE_REVERSAL_FLAG)
items[2].decodeFunc = CRYPT_AsnDecodeBitsInternal;
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
TRACE("Returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeCertVersion(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
ret = CRYPT_AsnDecodeIntInternal(pbEncoded + 1 + lenBytes, dataLen,
dwFlags, pvStructInfo, pcbStructInfo, NULL);
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
}
return ret;
}
static BOOL CRYPT_AsnDecodeValidity(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ 0, offsetof(CERT_PRIVATE_KEY_VALIDITY, NotBefore),
CRYPT_AsnDecodeChoiceOfTimeInternal, sizeof(FILETIME), FALSE, FALSE, 0 },
{ 0, offsetof(CERT_PRIVATE_KEY_VALIDITY, NotAfter),
CRYPT_AsnDecodeChoiceOfTimeInternal, sizeof(FILETIME), FALSE, FALSE, 0 },
};
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, NULL);
return ret;
}
static BOOL CRYPT_AsnDecodeCertExtensionsInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CERT_INFO, cExtension), offsetof(CERT_INFO, rgExtension),
FINALMEMBERSIZE(CERT_INFO, cExtension),
CRYPT_AsnDecodeExtension, sizeof(CERT_EXTENSION), TRUE,
offsetof(CERT_EXTENSION, pszObjId) };
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL CRYPT_AsnDecodeCertExtensions(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
ret = CRYPT_AsnDecodeCertExtensionsInternal(pbEncoded + 1 + lenBytes,
dataLen, dwFlags, pvStructInfo, pcbStructInfo, NULL);
if (ret && pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
}
return ret;
}
static BOOL CRYPT_AsnDecodeCertInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
struct AsnDecodeSequenceItem items[] = {
{ ASN_CONTEXT | ASN_CONSTRUCTOR, offsetof(CERT_INFO, dwVersion),
CRYPT_AsnDecodeCertVersion, sizeof(DWORD), TRUE, FALSE, 0, 0 },
{ ASN_INTEGER, offsetof(CERT_INFO, SerialNumber),
CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB), FALSE,
TRUE, offsetof(CERT_INFO, SerialNumber.pbData), 0 },
{ ASN_SEQUENCEOF, offsetof(CERT_INFO, SignatureAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CERT_INFO, SignatureAlgorithm.pszObjId), 0 },
{ 0, offsetof(CERT_INFO, Issuer), CRYPT_AsnDecodeDerBlob,
sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CERT_INFO,
Issuer.pbData) },
{ ASN_SEQUENCEOF, offsetof(CERT_INFO, NotBefore),
CRYPT_AsnDecodeValidity, sizeof(CERT_PRIVATE_KEY_VALIDITY), FALSE,
FALSE, 0 },
{ 0, offsetof(CERT_INFO, Subject), CRYPT_AsnDecodeDerBlob,
sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CERT_INFO,
Subject.pbData) },
{ ASN_SEQUENCEOF, offsetof(CERT_INFO, SubjectPublicKeyInfo),
CRYPT_AsnDecodePubKeyInfoInternal, sizeof(CERT_PUBLIC_KEY_INFO),
FALSE, TRUE, offsetof(CERT_INFO,
SubjectPublicKeyInfo.Algorithm.Parameters.pbData), 0 },
{ ASN_CONTEXT | 1, offsetof(CERT_INFO, IssuerUniqueId),
CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
offsetof(CERT_INFO, IssuerUniqueId.pbData), 0 },
{ ASN_CONTEXT | 2, offsetof(CERT_INFO, SubjectUniqueId),
CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
offsetof(CERT_INFO, SubjectUniqueId.pbData), 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 3, offsetof(CERT_INFO, cExtension),
CRYPT_AsnDecodeCertExtensions, FINALMEMBERSIZE(CERT_INFO, cExtension),
TRUE, TRUE, offsetof(CERT_INFO, rgExtension), 0 },
};
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo,
NULL, NULL);
if (ret && pvStructInfo)
{
CERT_INFO *info;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
info = *(CERT_INFO **)pvStructInfo;
else
info = pvStructInfo;
if (!info->SerialNumber.cbData || !info->Issuer.cbData ||
!info->Subject.cbData)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
/* Don't need to deallocate, because it should have failed on the
* first pass (and no memory was allocated.)
*/
ret = FALSE;
}
}
TRACE("Returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCert(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
DWORD size = 0;
/* Unless told not to, first try to decode it as a signed cert. */
if (!(dwFlags & CRYPT_DECODE_TO_BE_SIGNED_FLAG))
{
PCERT_SIGNED_CONTENT_INFO signedCert = NULL;
ret = CRYPT_AsnDecodeCertSignedContent(dwCertEncodingType,
X509_CERT, pbEncoded, cbEncoded, CRYPT_DECODE_ALLOC_FLAG, NULL,
&signedCert, &size);
if (ret)
{
size = 0;
ret = CRYPT_AsnDecodeCertInfo(dwCertEncodingType,
X509_CERT_TO_BE_SIGNED, signedCert->ToBeSigned.pbData,
signedCert->ToBeSigned.cbData, dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo);
LocalFree(signedCert);
}
}
/* Failing that, try it as an unsigned cert */
if (!ret)
{
size = 0;
ret = CRYPT_AsnDecodeCertInfo(dwCertEncodingType,
X509_CERT_TO_BE_SIGNED, pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo);
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("Returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeCRLEntryExtensions(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CRL_ENTRY, cExtension), offsetof(CRL_ENTRY, rgExtension),
FINALMEMBERSIZE(CRL_ENTRY, cExtension),
CRYPT_AsnDecodeExtension, sizeof(CERT_EXTENSION), TRUE,
offsetof(CERT_EXTENSION, pszObjId) };
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL CRYPT_AsnDecodeCRLEntry(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CRL_ENTRY, SerialNumber),
CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB), FALSE, TRUE,
offsetof(CRL_ENTRY, SerialNumber.pbData), 0 },
{ 0, offsetof(CRL_ENTRY, RevocationDate),
CRYPT_AsnDecodeChoiceOfTimeInternal, sizeof(FILETIME), FALSE, FALSE, 0 },
{ ASN_SEQUENCEOF, offsetof(CRL_ENTRY, cExtension),
CRYPT_AsnDecodeCRLEntryExtensions,
FINALMEMBERSIZE(CRL_ENTRY, cExtension), TRUE, TRUE,
offsetof(CRL_ENTRY, rgExtension), 0 },
};
PCRL_ENTRY entry = pvStructInfo;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags, entry,
*pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, entry, pcbStructInfo, pcbDecoded,
entry ? entry->SerialNumber.pbData : NULL);
if (ret && entry && !entry->SerialNumber.cbData)
{
WARN("empty CRL entry serial number\n");
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
return ret;
}
/* Warning: assumes pvStructInfo points to the cCRLEntry member of a CRL_INFO
* whose rgCRLEntry member has been set prior to calling.
*/
static BOOL CRYPT_AsnDecodeCRLEntries(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CRL_INFO, cCRLEntry), offsetof(CRL_INFO, rgCRLEntry),
MEMBERSIZE(CRL_INFO, cCRLEntry, cExtension),
CRYPT_AsnDecodeCRLEntry, sizeof(CRL_ENTRY), TRUE,
offsetof(CRL_ENTRY, SerialNumber.pbData) };
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
TRACE("Returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeCRLExtensionsInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CRL_INFO, cExtension), offsetof(CRL_INFO, rgExtension),
FINALMEMBERSIZE(CRL_INFO, cExtension),
CRYPT_AsnDecodeExtension, sizeof(CERT_EXTENSION), TRUE,
offsetof(CERT_EXTENSION, pszObjId) };
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL CRYPT_AsnDecodeCRLExtensions(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
ret = CRYPT_AsnDecodeCRLExtensionsInternal(pbEncoded + 1 + lenBytes,
dataLen, dwFlags, pvStructInfo, pcbStructInfo, NULL);
if (ret && pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
}
return ret;
}
static BOOL CRYPT_AsnDecodeCRLInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CRL_INFO, dwVersion),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), TRUE, FALSE, 0, 0 },
{ ASN_SEQUENCEOF, offsetof(CRL_INFO, SignatureAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CRL_INFO, SignatureAlgorithm.pszObjId), 0 },
{ 0, offsetof(CRL_INFO, Issuer), CRYPT_AsnDecodeDerBlob,
sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CRL_INFO,
Issuer.pbData) },
{ 0, offsetof(CRL_INFO, ThisUpdate), CRYPT_AsnDecodeChoiceOfTimeInternal,
sizeof(FILETIME), FALSE, FALSE, 0 },
{ 0, offsetof(CRL_INFO, NextUpdate), CRYPT_AsnDecodeChoiceOfTimeInternal,
sizeof(FILETIME), TRUE, FALSE, 0 },
{ ASN_SEQUENCEOF, offsetof(CRL_INFO, cCRLEntry),
CRYPT_AsnDecodeCRLEntries, MEMBERSIZE(CRL_INFO, cCRLEntry, cExtension),
TRUE, TRUE, offsetof(CRL_INFO, rgCRLEntry), 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 0, offsetof(CRL_INFO, cExtension),
CRYPT_AsnDecodeCRLExtensions, FINALMEMBERSIZE(CRL_INFO, cExtension),
TRUE, TRUE, offsetof(CRL_INFO, rgExtension), 0 },
};
BOOL ret = TRUE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items), pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, NULL, NULL);
TRACE("Returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCRL(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
DWORD size = 0;
/* Unless told not to, first try to decode it as a signed crl. */
if (!(dwFlags & CRYPT_DECODE_TO_BE_SIGNED_FLAG))
{
PCERT_SIGNED_CONTENT_INFO signedCrl = NULL;
ret = CRYPT_AsnDecodeCertSignedContent(dwCertEncodingType,
X509_CERT, pbEncoded, cbEncoded, CRYPT_DECODE_ALLOC_FLAG, NULL,
&signedCrl, &size);
if (ret)
{
size = 0;
ret = CRYPT_AsnDecodeCRLInfo(dwCertEncodingType,
X509_CERT_CRL_TO_BE_SIGNED, signedCrl->ToBeSigned.pbData,
signedCrl->ToBeSigned.cbData, dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo);
LocalFree(signedCrl);
}
}
/* Failing that, try it as an unsigned crl */
if (!ret)
{
size = 0;
ret = CRYPT_AsnDecodeCRLInfo(dwCertEncodingType,
X509_CERT_CRL_TO_BE_SIGNED, pbEncoded, cbEncoded,
dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("Returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeOidIgnoreTag(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret = TRUE;
DWORD dataLen;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD bytesNeeded = sizeof(LPSTR);
if (dataLen)
{
const BYTE *ptr;
char str[32];
snprintf(str, sizeof(str), "%d.%d",
pbEncoded[1 + lenBytes] / 40,
pbEncoded[1 + lenBytes] - (pbEncoded[1 + lenBytes] / 40)
* 40);
bytesNeeded += strlen(str) + 1;
for (ptr = pbEncoded + 2 + lenBytes; ret &&
ptr - pbEncoded - 1 - lenBytes < dataLen; )
{
int val = 0;
while (ptr - pbEncoded - 1 - lenBytes < dataLen &&
(*ptr & 0x80))
{
val <<= 7;
val |= *ptr & 0x7f;
ptr++;
}
if (ptr - pbEncoded - 1 - lenBytes >= dataLen ||
(*ptr & 0x80))
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
{
val <<= 7;
val |= *ptr++;
snprintf(str, sizeof(str), ".%d", val);
bytesNeeded += strlen(str);
}
}
}
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
if (dataLen)
{
const BYTE *ptr;
LPSTR pszObjId = *(LPSTR *)pvStructInfo;
*pszObjId = 0;
sprintf(pszObjId, "%d.%d", pbEncoded[1 + lenBytes] / 40,
pbEncoded[1 + lenBytes] - (pbEncoded[1 + lenBytes] /
40) * 40);
pszObjId += strlen(pszObjId);
for (ptr = pbEncoded + 2 + lenBytes; ret &&
ptr - pbEncoded - 1 - lenBytes < dataLen; )
{
int val = 0;
while (ptr - pbEncoded - 1 - lenBytes < dataLen &&
(*ptr & 0x80))
{
val <<= 7;
val |= *ptr & 0x7f;
ptr++;
}
val <<= 7;
val |= *ptr++;
sprintf(pszObjId, ".%d", val);
pszObjId += strlen(pszObjId);
}
}
else
*(LPSTR *)pvStructInfo = NULL;
*pcbStructInfo = bytesNeeded;
}
}
return ret;
}
static BOOL CRYPT_AsnDecodeOidInternal(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
if (pbEncoded[0] == ASN_OBJECTIDENTIFIER)
ret = CRYPT_AsnDecodeOidIgnoreTag(pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pcbStructInfo, pcbDecoded);
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
return ret;
}
static BOOL CRYPT_AsnDecodeExtension(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CERT_EXTENSION, pszObjId),
CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
offsetof(CERT_EXTENSION, pszObjId), 0 },
{ ASN_BOOL, offsetof(CERT_EXTENSION, fCritical), CRYPT_AsnDecodeBool,
sizeof(BOOL), TRUE, FALSE, 0, 0 },
{ ASN_OCTETSTRING, offsetof(CERT_EXTENSION, Value),
CRYPT_AsnDecodeOctets, sizeof(CRYPT_OBJID_BLOB), FALSE, TRUE,
offsetof(CERT_EXTENSION, Value.pbData) },
};
BOOL ret = TRUE;
PCERT_EXTENSION ext = pvStructInfo;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags, ext,
*pcbStructInfo);
if (ext)
TRACE("ext->pszObjId is %p\n", ext->pszObjId);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, ext, pcbStructInfo,
pcbDecoded, ext ? ext->pszObjId : NULL);
if (ext)
TRACE("ext->pszObjId is %p (%s)\n", ext->pszObjId,
debugstr_a(ext->pszObjId));
TRACE("returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeExtensions(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);
__TRY
{
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CERT_EXTENSIONS, cExtension),
offsetof(CERT_EXTENSIONS, rgExtension),
sizeof(CERT_EXTENSIONS),
CRYPT_AsnDecodeExtension, sizeof(CERT_EXTENSION), TRUE,
offsetof(CERT_EXTENSION, pszObjId) };
CERT_EXTENSIONS *exts = pvStructInfo;
if (pvStructInfo && !(dwFlags & CRYPT_DECODE_ALLOC_FLAG))
exts->rgExtension = (CERT_EXTENSION *)(exts + 1);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, pDecodePara, pvStructInfo, pcbStructInfo, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
/* Warning: this assumes the address of value->Value.pbData is already set, in
* order to avoid overwriting memory. (In some cases, it may change it, if it
* doesn't copy anything to memory.) Be sure to set it correctly!
*/
static BOOL CRYPT_AsnDecodeNameValueInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
DWORD dataLen;
CERT_NAME_VALUE *value = pvStructInfo;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD bytesNeeded = sizeof(CERT_NAME_VALUE), valueType;
switch (pbEncoded[0])
{
case ASN_OCTETSTRING:
valueType = CERT_RDN_OCTET_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_NUMERICSTRING:
valueType = CERT_RDN_NUMERIC_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_PRINTABLESTRING:
valueType = CERT_RDN_PRINTABLE_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_IA5STRING:
valueType = CERT_RDN_IA5_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_T61STRING:
valueType = CERT_RDN_T61_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_VIDEOTEXSTRING:
valueType = CERT_RDN_VIDEOTEX_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_GRAPHICSTRING:
valueType = CERT_RDN_GRAPHIC_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_VISIBLESTRING:
valueType = CERT_RDN_VISIBLE_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_GENERALSTRING:
valueType = CERT_RDN_GENERAL_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_UNIVERSALSTRING:
FIXME("ASN_UNIVERSALSTRING: unimplemented\n");
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
case ASN_BMPSTRING:
valueType = CERT_RDN_BMP_STRING;
bytesNeeded += dataLen;
break;
case ASN_UTF8STRING:
valueType = CERT_RDN_UTF8_STRING;
bytesNeeded += MultiByteToWideChar(CP_UTF8, 0,
(LPCSTR)pbEncoded + 1 + lenBytes, dataLen, NULL, 0) * sizeof(WCHAR);
break;
default:
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!value)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pcbStructInfo = bytesNeeded;
value->dwValueType = valueType;
if (dataLen)
{
DWORD i;
assert(value->Value.pbData);
switch (pbEncoded[0])
{
case ASN_OCTETSTRING:
case ASN_NUMERICSTRING:
case ASN_PRINTABLESTRING:
case ASN_IA5STRING:
case ASN_T61STRING:
case ASN_VIDEOTEXSTRING:
case ASN_GRAPHICSTRING:
case ASN_VISIBLESTRING:
case ASN_GENERALSTRING:
value->Value.cbData = dataLen;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
memcpy(value->Value.pbData,
pbEncoded + 1 + lenBytes, dataLen);
else
value->Value.pbData = (LPBYTE)pbEncoded + 1 +
lenBytes;
break;
case ASN_BMPSTRING:
{
LPWSTR str = (LPWSTR)value->Value.pbData;
value->Value.cbData = dataLen;
for (i = 0; i < dataLen / 2; i++)
str[i] = (pbEncoded[1 + lenBytes + 2 * i] << 8) |
pbEncoded[1 + lenBytes + 2 * i + 1];
break;
}
case ASN_UTF8STRING:
{
LPWSTR str = (LPWSTR)value->Value.pbData;
value->Value.cbData = MultiByteToWideChar(CP_UTF8, 0,
(LPCSTR)pbEncoded + 1 + lenBytes, dataLen,
str, bytesNeeded - sizeof(CERT_NAME_VALUE)) * 2;
break;
}
}
}
else
{
value->Value.cbData = 0;
value->Value.pbData = NULL;
}
}
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeNameValue(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
__TRY
{
ret = CRYPT_AsnDecodeNameValueInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
if (ret && pvStructInfo)
{
ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, *pcbStructInfo);
if (ret)
{
CERT_NAME_VALUE *value;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
value = pvStructInfo;
value->Value.pbData = ((BYTE *)value + sizeof(CERT_NAME_VALUE));
ret = CRYPT_AsnDecodeNameValueInternal( pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
pcbStructInfo, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, value);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeUnicodeNameValueInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
DWORD dataLen;
CERT_NAME_VALUE *value = pvStructInfo;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD bytesNeeded = sizeof(CERT_NAME_VALUE), valueType;
switch (pbEncoded[0])
{
case ASN_NUMERICSTRING:
valueType = CERT_RDN_NUMERIC_STRING;
if (dataLen)
bytesNeeded += (dataLen + 1) * 2;
break;
case ASN_PRINTABLESTRING:
valueType = CERT_RDN_PRINTABLE_STRING;
if (dataLen)
bytesNeeded += (dataLen + 1) * 2;
break;
case ASN_IA5STRING:
valueType = CERT_RDN_IA5_STRING;
if (dataLen)
bytesNeeded += (dataLen + 1) * 2;
break;
case ASN_T61STRING:
valueType = CERT_RDN_T61_STRING;
if (dataLen)
bytesNeeded += (dataLen + 1) * 2;
break;
case ASN_VIDEOTEXSTRING:
valueType = CERT_RDN_VIDEOTEX_STRING;
if (dataLen)
bytesNeeded += (dataLen + 1) * 2;
break;
case ASN_GRAPHICSTRING:
valueType = CERT_RDN_GRAPHIC_STRING;
if (dataLen)
bytesNeeded += (dataLen + 1) * 2;
break;
case ASN_VISIBLESTRING:
valueType = CERT_RDN_VISIBLE_STRING;
if (dataLen)
bytesNeeded += (dataLen + 1) * 2;
break;
case ASN_GENERALSTRING:
valueType = CERT_RDN_GENERAL_STRING;
if (dataLen)
bytesNeeded += (dataLen + 1) * 2;
break;
case ASN_UNIVERSALSTRING:
valueType = CERT_RDN_UNIVERSAL_STRING;
if (dataLen)
bytesNeeded += dataLen / 2 + sizeof(WCHAR);
break;
case ASN_BMPSTRING:
valueType = CERT_RDN_BMP_STRING;
if (dataLen)
bytesNeeded += dataLen + sizeof(WCHAR);
break;
case ASN_UTF8STRING:
valueType = CERT_RDN_UTF8_STRING;
if (dataLen)
bytesNeeded += (MultiByteToWideChar(CP_UTF8, 0,
(LPCSTR)pbEncoded + 1 + lenBytes, dataLen, NULL, 0) + 1) * 2;
break;
default:
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!value)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pcbStructInfo = bytesNeeded;
value->dwValueType = valueType;
if (dataLen)
{
DWORD i;
LPWSTR str = (LPWSTR)value->Value.pbData;
assert(value->Value.pbData);
switch (pbEncoded[0])
{
case ASN_NUMERICSTRING:
case ASN_PRINTABLESTRING:
case ASN_IA5STRING:
case ASN_T61STRING:
case ASN_VIDEOTEXSTRING:
case ASN_GRAPHICSTRING:
case ASN_VISIBLESTRING:
case ASN_GENERALSTRING:
value->Value.cbData = dataLen * 2;
for (i = 0; i < dataLen; i++)
str[i] = pbEncoded[1 + lenBytes + i];
str[i] = 0;
break;
case ASN_UNIVERSALSTRING:
value->Value.cbData = dataLen / 2;
for (i = 0; i < dataLen / 4; i++)
str[i] = (pbEncoded[1 + lenBytes + 2 * i + 2] << 8)
| pbEncoded[1 + lenBytes + 2 * i + 3];
str[i] = 0;
break;
case ASN_BMPSTRING:
value->Value.cbData = dataLen;
for (i = 0; i < dataLen / 2; i++)
str[i] = (pbEncoded[1 + lenBytes + 2 * i] << 8) |
pbEncoded[1 + lenBytes + 2 * i + 1];
str[i] = 0;
break;
case ASN_UTF8STRING:
value->Value.cbData = MultiByteToWideChar(CP_UTF8, 0,
(LPCSTR)pbEncoded + 1 + lenBytes, dataLen,
str, bytesNeeded - sizeof(CERT_NAME_VALUE)) * sizeof(WCHAR);
*(WCHAR *)(value->Value.pbData + value->Value.cbData) = 0;
value->Value.cbData += sizeof(WCHAR);
break;
}
}
else
{
value->Value.cbData = 0;
value->Value.pbData = NULL;
}
}
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeUnicodeNameValue(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
__TRY
{
ret = CRYPT_AsnDecodeUnicodeNameValueInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
if (ret && pvStructInfo)
{
ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, *pcbStructInfo);
if (ret)
{
CERT_NAME_VALUE *value;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
value = pvStructInfo;
value->Value.pbData = ((BYTE *)value + sizeof(CERT_NAME_VALUE));
ret = CRYPT_AsnDecodeUnicodeNameValueInternal(pbEncoded,
cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
pcbStructInfo, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, value);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeRdnAttr(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CERT_RDN_ATTR, pszObjId),
CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
offsetof(CERT_RDN_ATTR, pszObjId), 0 },
{ 0, offsetof(CERT_RDN_ATTR, dwValueType),
CRYPT_AsnDecodeNameValueInternal, sizeof(CERT_NAME_VALUE),
FALSE, TRUE, offsetof(CERT_RDN_ATTR, Value.pbData), 0 },
};
CERT_RDN_ATTR *attr = pvStructInfo;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
if (attr)
TRACE("attr->pszObjId is %p\n", attr->pszObjId);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, attr, pcbStructInfo, pcbDecoded,
attr ? attr->pszObjId : NULL);
if (attr)
{
TRACE("attr->pszObjId is %p (%s)\n", attr->pszObjId,
debugstr_a(attr->pszObjId));
TRACE("attr->dwValueType is %ld\n", attr->dwValueType);
}
TRACE("returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeRdn(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret = TRUE;
struct AsnArrayDescriptor arrayDesc = { ASN_CONSTRUCTOR | ASN_SETOF,
offsetof(CERT_RDN, cRDNAttr), offsetof(CERT_RDN, rgRDNAttr),
sizeof(CERT_RDN),
CRYPT_AsnDecodeRdnAttr, sizeof(CERT_RDN_ATTR), TRUE,
offsetof(CERT_RDN_ATTR, pszObjId) };
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeName(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
__TRY
{
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CERT_NAME_INFO, cRDN), offsetof(CERT_NAME_INFO, rgRDN),
sizeof(CERT_NAME_INFO),
CRYPT_AsnDecodeRdn, sizeof(CERT_RDN), TRUE,
offsetof(CERT_RDN, rgRDNAttr) };
DWORD bytesNeeded = 0;
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL, &bytesNeeded,
NULL);
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
CERT_NAME_INFO *info;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
info = pvStructInfo;
info->rgRDN = (CERT_RDN *)((BYTE *)pvStructInfo +
sizeof(CERT_NAME_INFO));
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pvStructInfo,
&bytesNeeded, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, info);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeUnicodeRdnAttr(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CERT_RDN_ATTR, pszObjId),
CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
offsetof(CERT_RDN_ATTR, pszObjId), 0 },
{ 0, offsetof(CERT_RDN_ATTR, dwValueType),
CRYPT_AsnDecodeUnicodeNameValueInternal, sizeof(CERT_NAME_VALUE),
FALSE, TRUE, offsetof(CERT_RDN_ATTR, Value.pbData), 0 },
};
CERT_RDN_ATTR *attr = pvStructInfo;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
if (attr)
TRACE("attr->pszObjId is %p\n", attr->pszObjId);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, attr, pcbStructInfo, pcbDecoded,
attr ? attr->pszObjId : NULL);
if (attr)
{
TRACE("attr->pszObjId is %p (%s)\n", attr->pszObjId,
debugstr_a(attr->pszObjId));
TRACE("attr->dwValueType is %ld\n", attr->dwValueType);
}
TRACE("returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeUnicodeRdn(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret = TRUE;
struct AsnArrayDescriptor arrayDesc = { ASN_CONSTRUCTOR | ASN_SETOF,
offsetof(CERT_RDN, cRDNAttr), offsetof(CERT_RDN, rgRDNAttr),
sizeof(CERT_RDN),
CRYPT_AsnDecodeUnicodeRdnAttr, sizeof(CERT_RDN_ATTR), TRUE,
offsetof(CERT_RDN_ATTR, pszObjId) };
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeUnicodeName(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
__TRY
{
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CERT_NAME_INFO, cRDN), offsetof(CERT_NAME_INFO, rgRDN),
sizeof(CERT_NAME_INFO),
CRYPT_AsnDecodeUnicodeRdn, sizeof(CERT_RDN), TRUE,
offsetof(CERT_RDN, rgRDNAttr) };
DWORD bytesNeeded = 0;
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL, &bytesNeeded,
NULL);
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
CERT_NAME_INFO *info;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
info = pvStructInfo;
info->rgRDN = (CERT_RDN *)((BYTE *)pvStructInfo +
sizeof(CERT_NAME_INFO));
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pvStructInfo,
&bytesNeeded, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, info);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_FindEncodedLen(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD *pcbDecoded)
{
BOOL ret = TRUE, done = FALSE;
DWORD indefiniteNestingLevels = 0, decoded = 0;
TRACE("(%p, %ld)\n", pbEncoded, cbEncoded);
do {
DWORD dataLen;
if (!cbEncoded)
done = TRUE;
else if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded,
&dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
if (dataLen == CMSG_INDEFINITE_LENGTH)
{
indefiniteNestingLevels++;
pbEncoded += 1 + lenBytes;
cbEncoded -= 1 + lenBytes;
decoded += 1 + lenBytes;
TRACE("indefiniteNestingLevels = %ld\n",
indefiniteNestingLevels);
}
else
{
if (pbEncoded[0] == 0 && pbEncoded[1] == 0 &&
indefiniteNestingLevels)
{
indefiniteNestingLevels--;
TRACE("indefiniteNestingLevels = %ld\n",
indefiniteNestingLevels);
}
pbEncoded += 1 + lenBytes + dataLen;
cbEncoded -= 1 + lenBytes + dataLen;
decoded += 1 + lenBytes + dataLen;
if (!indefiniteNestingLevels)
done = TRUE;
}
}
} while (ret && !done);
/* If we haven't found all 0 TLVs, we haven't found the end */
if (ret && indefiniteNestingLevels)
{
SetLastError(CRYPT_E_ASN1_EOD);
ret = FALSE;
}
if (ret)
*pcbDecoded = decoded;
TRACE("returning %d (%ld)\n", ret, ret ? *pcbDecoded : 0);
return ret;
}
static BOOL CRYPT_AsnDecodeCopyBytes(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
DWORD bytesNeeded = sizeof(CRYPT_OBJID_BLOB), encodedLen = 0;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
if ((ret = CRYPT_FindEncodedLen(pbEncoded, cbEncoded, &encodedLen)))
{
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += encodedLen;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
*pcbStructInfo = bytesNeeded;
ret = FALSE;
}
else
{
PCRYPT_OBJID_BLOB blob = pvStructInfo;
*pcbStructInfo = bytesNeeded;
blob->cbData = encodedLen;
if (encodedLen)
{
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
blob->pbData = (LPBYTE)pbEncoded;
else
{
assert(blob->pbData);
memcpy(blob->pbData, pbEncoded, blob->cbData);
}
}
else
blob->pbData = NULL;
}
if (pcbDecoded)
*pcbDecoded = encodedLen;
}
return ret;
}
static BOOL CRYPT_AsnDecodeCTLUsage(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CTL_USAGE, cUsageIdentifier),
offsetof(CTL_USAGE, rgpszUsageIdentifier),
sizeof(CTL_USAGE),
CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), TRUE, 0 };
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL CRYPT_AsnDecodeCTLEntryAttributes(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
struct AsnArrayDescriptor arrayDesc = { 0,
offsetof(CTL_ENTRY, cAttribute), offsetof(CTL_ENTRY, rgAttribute),
FINALMEMBERSIZE(CTL_ENTRY, cAttribute),
CRYPT_AsnDecodePKCSAttributeInternal, sizeof(CRYPT_ATTRIBUTE), TRUE,
offsetof(CRYPT_ATTRIBUTE, pszObjId) };
BOOL ret;
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL CRYPT_AsnDecodeCTLEntry(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_OCTETSTRING, offsetof(CTL_ENTRY, SubjectIdentifier),
CRYPT_AsnDecodeOctets, sizeof(CRYPT_DATA_BLOB), FALSE, TRUE,
offsetof(CTL_ENTRY, SubjectIdentifier.pbData), 0 },
{ ASN_CONSTRUCTOR | ASN_SETOF, offsetof(CTL_ENTRY, cAttribute),
CRYPT_AsnDecodeCTLEntryAttributes,
FINALMEMBERSIZE(CTL_ENTRY, cAttribute), FALSE, TRUE,
offsetof(CTL_ENTRY, rgAttribute), 0 },
};
BOOL ret = TRUE;
CTL_ENTRY *entry = pvStructInfo;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags, entry,
*pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, entry, pcbStructInfo,
pcbDecoded, entry ? entry->SubjectIdentifier.pbData : NULL);
return ret;
}
static BOOL CRYPT_AsnDecodeCTLEntries(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CTL_INFO, cCTLEntry), offsetof(CTL_INFO, rgCTLEntry),
FINALMEMBERSIZE(CTL_INFO, cExtension),
CRYPT_AsnDecodeCTLEntry, sizeof(CTL_ENTRY), TRUE,
offsetof(CTL_ENTRY, SubjectIdentifier.pbData) };
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL CRYPT_AsnDecodeCTLExtensionsInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CTL_INFO, cExtension), offsetof(CTL_INFO, rgExtension),
FINALMEMBERSIZE(CTL_INFO, cExtension),
CRYPT_AsnDecodeExtension, sizeof(CERT_EXTENSION), TRUE,
offsetof(CERT_EXTENSION, pszObjId) };
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL CRYPT_AsnDecodeCTLExtensions(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
ret = CRYPT_AsnDecodeCTLExtensionsInternal(pbEncoded + 1 + lenBytes,
dataLen, dwFlags, pvStructInfo, pcbStructInfo, NULL);
if (ret && pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCTL(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CTL_INFO, dwVersion),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), TRUE, FALSE, 0, 0 },
{ ASN_SEQUENCEOF, offsetof(CTL_INFO, SubjectUsage),
CRYPT_AsnDecodeCTLUsage, sizeof(CTL_USAGE), FALSE, TRUE,
offsetof(CTL_INFO, SubjectUsage.rgpszUsageIdentifier), 0 },
{ ASN_OCTETSTRING, offsetof(CTL_INFO, ListIdentifier),
CRYPT_AsnDecodeOctets, sizeof(CRYPT_DATA_BLOB), TRUE,
TRUE, offsetof(CTL_INFO, ListIdentifier.pbData), 0 },
{ ASN_INTEGER, offsetof(CTL_INFO, SequenceNumber),
CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB),
TRUE, TRUE, offsetof(CTL_INFO, SequenceNumber.pbData), 0 },
{ 0, offsetof(CTL_INFO, ThisUpdate),
CRYPT_AsnDecodeChoiceOfTimeInternal, sizeof(FILETIME), FALSE, FALSE,
0 },
{ 0, offsetof(CTL_INFO, NextUpdate),
CRYPT_AsnDecodeChoiceOfTimeInternal, sizeof(FILETIME), TRUE, FALSE,
0 },
{ ASN_SEQUENCEOF, offsetof(CTL_INFO, SubjectAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CTL_INFO, SubjectAlgorithm.pszObjId), 0 },
{ ASN_SEQUENCEOF, offsetof(CTL_INFO, cCTLEntry),
CRYPT_AsnDecodeCTLEntries,
MEMBERSIZE(CTL_INFO, cCTLEntry, cExtension),
TRUE, TRUE, offsetof(CTL_INFO, rgCTLEntry), 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 0, offsetof(CTL_INFO, cExtension),
CRYPT_AsnDecodeCTLExtensions, FINALMEMBERSIZE(CTL_INFO, cExtension),
TRUE, TRUE, offsetof(CTL_INFO, rgExtension), 0 },
};
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeSMIMECapability(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CRYPT_SMIME_CAPABILITY, pszObjId),
CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
offsetof(CRYPT_SMIME_CAPABILITY, pszObjId), 0 },
{ 0, offsetof(CRYPT_SMIME_CAPABILITY, Parameters),
CRYPT_AsnDecodeCopyBytes, sizeof(CRYPT_OBJID_BLOB), TRUE, TRUE,
offsetof(CRYPT_SMIME_CAPABILITY, Parameters.pbData), 0 },
};
PCRYPT_SMIME_CAPABILITY capability = pvStructInfo;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, capability ? capability->pszObjId : NULL);
TRACE("returning %d\n", ret);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeSMIMECapabilities(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CRYPT_SMIME_CAPABILITIES, cCapability),
offsetof(CRYPT_SMIME_CAPABILITIES, rgCapability),
sizeof(CRYPT_SMIME_CAPABILITIES),
CRYPT_AsnDecodeSMIMECapability, sizeof(CRYPT_SMIME_CAPABILITY), TRUE,
offsetof(CRYPT_SMIME_CAPABILITY, pszObjId) };
CRYPT_SMIME_CAPABILITIES *capabilities = pvStructInfo;
if (pvStructInfo && !(dwFlags & CRYPT_DECODE_ALLOC_FLAG))
capabilities->rgCapability = (CRYPT_SMIME_CAPABILITY *)(capabilities + 1);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, pDecodePara, pvStructInfo, pcbStructInfo, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodeIA5String(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
DWORD dataLen;
LPSTR *pStr = pvStructInfo;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD bytesNeeded = sizeof(LPSTR) + sizeof(char);
if (pbEncoded[0] != ASN_IA5STRING)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
{
bytesNeeded += dataLen;
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pcbStructInfo = bytesNeeded;
if (dataLen)
{
LPSTR str = *pStr;
assert(str);
memcpy(str, pbEncoded + 1 + lenBytes, dataLen);
str[dataLen] = 0;
}
else
*pStr = NULL;
}
}
}
return ret;
}
static BOOL CRYPT_AsnDecodeNoticeNumbers(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CERT_POLICY_QUALIFIER_NOTICE_REFERENCE, cNoticeNumbers),
offsetof(CERT_POLICY_QUALIFIER_NOTICE_REFERENCE, rgNoticeNumbers),
FINALMEMBERSIZE(CERT_POLICY_QUALIFIER_NOTICE_REFERENCE, cNoticeNumbers),
CRYPT_AsnDecodeIntInternal, sizeof(int), FALSE, 0 };
BOOL ret;
TRACE("(%p, %ld, %08lx, %p, %ld)\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pvStructInfo ? *pcbDecoded : 0);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodeNoticeReference(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_IA5STRING, offsetof(CERT_POLICY_QUALIFIER_NOTICE_REFERENCE,
pszOrganization), CRYPT_AsnDecodeIA5String, sizeof(LPSTR), FALSE, TRUE,
offsetof(CERT_POLICY_QUALIFIER_NOTICE_REFERENCE, pszOrganization), 0 },
{ ASN_SEQUENCEOF, offsetof(CERT_POLICY_QUALIFIER_NOTICE_REFERENCE,
cNoticeNumbers), CRYPT_AsnDecodeNoticeNumbers,
FINALMEMBERSIZE(CERT_POLICY_QUALIFIER_NOTICE_REFERENCE, cNoticeNumbers),
FALSE, TRUE, offsetof(CERT_POLICY_QUALIFIER_NOTICE_REFERENCE,
rgNoticeNumbers), 0 },
};
DWORD bytesNeeded = 0;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, NULL, &bytesNeeded, pcbDecoded,
NULL);
if (ret)
{
/* The caller is expecting a pointer to a
* CERT_POLICY_QUALIFIER_NOTICE_REFERENCE to be decoded, whereas
* CRYPT_AsnDecodeSequence is decoding a
* CERT_POLICY_QUALIFIER_NOTICE_REFERENCE. Increment the bytes
* needed, and decode again if the requisite space is available.
*/
bytesNeeded += sizeof(PCERT_POLICY_QUALIFIER_NOTICE_REFERENCE);
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
PCERT_POLICY_QUALIFIER_NOTICE_REFERENCE noticeRef;
*pcbStructInfo = bytesNeeded;
/* The pointer (pvStructInfo) passed in points to the first dynamic
* pointer, so use it as the pointer to the
* CERT_POLICY_QUALIFIER_NOTICE_REFERENCE, and create the
* appropriate offset for the first dynamic pointer within the
* notice reference by pointing to the first memory location past
* the CERT_POLICY_QUALIFIER_NOTICE_REFERENCE.
*/
noticeRef =
*(PCERT_POLICY_QUALIFIER_NOTICE_REFERENCE *)pvStructInfo;
noticeRef->pszOrganization = (LPSTR)((LPBYTE)noticeRef +
sizeof(CERT_POLICY_QUALIFIER_NOTICE_REFERENCE));
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items), pbEncoded, cbEncoded, dwFlags,
NULL, noticeRef, &bytesNeeded, pcbDecoded, noticeRef->pszOrganization);
}
}
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodeUnicodeString(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD bytesNeeded = sizeof(LPWSTR);
switch (pbEncoded[0])
{
case ASN_NUMERICSTRING:
if (dataLen)
bytesNeeded += (dataLen + 1) * 2;
break;
case ASN_PRINTABLESTRING:
if (dataLen)
bytesNeeded += (dataLen + 1) * 2;
break;
case ASN_IA5STRING:
if (dataLen)
bytesNeeded += (dataLen + 1) * 2;
break;
case ASN_T61STRING:
if (dataLen)
bytesNeeded += (dataLen + 1) * 2;
break;
case ASN_VIDEOTEXSTRING:
if (dataLen)
bytesNeeded += (dataLen + 1) * 2;
break;
case ASN_GRAPHICSTRING:
if (dataLen)
bytesNeeded += (dataLen + 1) * 2;
break;
case ASN_VISIBLESTRING:
if (dataLen)
bytesNeeded += (dataLen + 1) * 2;
break;
case ASN_GENERALSTRING:
if (dataLen)
bytesNeeded += (dataLen + 1) * 2;
break;
case ASN_UNIVERSALSTRING:
if (dataLen)
bytesNeeded += dataLen / 2 + sizeof(WCHAR);
break;
case ASN_BMPSTRING:
if (dataLen)
bytesNeeded += dataLen + sizeof(WCHAR);
break;
case ASN_UTF8STRING:
if (dataLen)
bytesNeeded += (MultiByteToWideChar(CP_UTF8, 0,
(LPCSTR)pbEncoded + 1 + lenBytes, dataLen, NULL, 0) + 1) * 2;
break;
default:
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
LPWSTR *pStr = pvStructInfo;
*pcbStructInfo = bytesNeeded;
if (dataLen)
{
DWORD i;
LPWSTR str = *pStr;
assert(str);
switch (pbEncoded[0])
{
case ASN_NUMERICSTRING:
case ASN_PRINTABLESTRING:
case ASN_IA5STRING:
case ASN_T61STRING:
case ASN_VIDEOTEXSTRING:
case ASN_GRAPHICSTRING:
case ASN_VISIBLESTRING:
case ASN_GENERALSTRING:
for (i = 0; i < dataLen; i++)
str[i] = pbEncoded[1 + lenBytes + i];
str[i] = 0;
break;
case ASN_UNIVERSALSTRING:
for (i = 0; i < dataLen / 4; i++)
str[i] = (pbEncoded[1 + lenBytes + 2 * i + 2] << 8)
| pbEncoded[1 + lenBytes + 2 * i + 3];
str[i] = 0;
break;
case ASN_BMPSTRING:
for (i = 0; i < dataLen / 2; i++)
str[i] = (pbEncoded[1 + lenBytes + 2 * i] << 8) |
pbEncoded[1 + lenBytes + 2 * i + 1];
str[i] = 0;
break;
case ASN_UTF8STRING:
{
int len = MultiByteToWideChar(CP_UTF8, 0,
(LPCSTR)pbEncoded + 1 + lenBytes, dataLen,
str, bytesNeeded - sizeof(CERT_NAME_VALUE)) * 2;
str[len] = 0;
break;
}
}
}
else
*pStr = NULL;
}
}
return ret;
}
static BOOL CRYPT_AsnDecodePolicyQualifierUserNoticeInternal(
const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo,
DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_SEQUENCE, offsetof(CERT_POLICY_QUALIFIER_USER_NOTICE,
pNoticeReference), CRYPT_AsnDecodeNoticeReference,
sizeof(PCERT_POLICY_QUALIFIER_NOTICE_REFERENCE), TRUE, TRUE,
offsetof(CERT_POLICY_QUALIFIER_USER_NOTICE, pNoticeReference), 0 },
{ 0, offsetof(CERT_POLICY_QUALIFIER_USER_NOTICE, pszDisplayText),
CRYPT_AsnDecodeUnicodeString, sizeof(LPWSTR), TRUE, TRUE,
offsetof(CERT_POLICY_QUALIFIER_USER_NOTICE, pszDisplayText), 0 },
};
PCERT_POLICY_QUALIFIER_USER_NOTICE notice = pvStructInfo;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, notice ? notice->pNoticeReference : NULL);
TRACE("returning %d\n", ret);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodePolicyQualifierUserNotice(
DWORD dwCertEncodingType, LPCSTR lpszStructType, const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
DWORD bytesNeeded = 0;
ret = CRYPT_AsnDecodePolicyQualifierUserNoticeInternal(pbEncoded,
cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded,
NULL);
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
PCERT_POLICY_QUALIFIER_USER_NOTICE notice;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
notice = pvStructInfo;
notice->pNoticeReference =
(PCERT_POLICY_QUALIFIER_NOTICE_REFERENCE)
((BYTE *)pvStructInfo +
sizeof(CERT_POLICY_QUALIFIER_USER_NOTICE));
ret = CRYPT_AsnDecodePolicyQualifierUserNoticeInternal(
pbEncoded, cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG,
pvStructInfo, &bytesNeeded, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, notice);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodePKCSAttributeValue(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { 0,
offsetof(CRYPT_ATTRIBUTE, cValue), offsetof(CRYPT_ATTRIBUTE, rgValue),
FINALMEMBERSIZE(CRYPT_ATTRIBUTE, cValue),
CRYPT_AsnDecodeCopyBytes,
sizeof(CRYPT_DER_BLOB), TRUE, offsetof(CRYPT_DER_BLOB, pbData) };
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pvStructInfo ? *pcbStructInfo : 0, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL CRYPT_AsnDecodePKCSAttributeInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CRYPT_ATTRIBUTE, pszObjId),
CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
offsetof(CRYPT_ATTRIBUTE, pszObjId), 0 },
{ ASN_CONSTRUCTOR | ASN_SETOF, offsetof(CRYPT_ATTRIBUTE, cValue),
CRYPT_AsnDecodePKCSAttributeValue,
FINALMEMBERSIZE(CRYPT_ATTRIBUTE, cValue), FALSE,
TRUE, offsetof(CRYPT_ATTRIBUTE, rgValue), 0 },
};
PCRYPT_ATTRIBUTE attr = pvStructInfo;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, attr ? attr->pszObjId : NULL);
TRACE("returning %d\n", ret);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodePKCSAttribute(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
DWORD bytesNeeded = 0;
ret = CRYPT_AsnDecodePKCSAttributeInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL);
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
PCRYPT_ATTRIBUTE attr;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
attr = pvStructInfo;
attr->pszObjId = (LPSTR)((BYTE *)pvStructInfo +
sizeof(CRYPT_ATTRIBUTE));
ret = CRYPT_AsnDecodePKCSAttributeInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo, &bytesNeeded,
NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, attr);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodePKCSAttributesInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
struct AsnArrayDescriptor arrayDesc = { 0,
offsetof(CRYPT_ATTRIBUTES, cAttr), offsetof(CRYPT_ATTRIBUTES, rgAttr),
sizeof(CRYPT_ATTRIBUTES),
CRYPT_AsnDecodePKCSAttributeInternal, sizeof(CRYPT_ATTRIBUTE), TRUE,
offsetof(CRYPT_ATTRIBUTE, pszObjId) };
BOOL ret;
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodePKCSAttributes(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnArrayDescriptor arrayDesc = { ASN_CONSTRUCTOR | ASN_SETOF,
offsetof(CRYPT_ATTRIBUTES, cAttr), offsetof(CRYPT_ATTRIBUTES, rgAttr),
sizeof(CRYPT_ATTRIBUTES),
CRYPT_AsnDecodePKCSAttributeInternal, sizeof(CRYPT_ATTRIBUTE),
TRUE, offsetof(CRYPT_ATTRIBUTE, pszObjId) };
CRYPT_ATTRIBUTES *attrs = pvStructInfo;
if (pvStructInfo && !(dwFlags & CRYPT_DECODE_ALLOC_FLAG))
attrs->rgAttr = (CRYPT_ATTRIBUTE *)(attrs + 1);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, pDecodePara, pvStructInfo, pcbStructInfo, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodeAlgorithmId(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
CRYPT_ALGORITHM_IDENTIFIER *algo = pvStructInfo;
BOOL ret = TRUE;
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CRYPT_ALGORITHM_IDENTIFIER, pszObjId),
CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
offsetof(CRYPT_ALGORITHM_IDENTIFIER, pszObjId), 0 },
{ 0, offsetof(CRYPT_ALGORITHM_IDENTIFIER, Parameters),
CRYPT_AsnDecodeCopyBytes, sizeof(CRYPT_OBJID_BLOB), TRUE, TRUE,
offsetof(CRYPT_ALGORITHM_IDENTIFIER, Parameters.pbData), 0 },
};
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, algo ? algo->pszObjId : NULL);
if (ret && pvStructInfo)
{
TRACE("pszObjId is %p (%s)\n", algo->pszObjId,
debugstr_a(algo->pszObjId));
}
return ret;
}
static BOOL CRYPT_AsnDecodePubKeyInfoInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
struct AsnDecodeSequenceItem items[] = {
{ ASN_SEQUENCEOF, offsetof(CERT_PUBLIC_KEY_INFO, Algorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CERT_PUBLIC_KEY_INFO,
Algorithm.pszObjId) },
{ ASN_BITSTRING, offsetof(CERT_PUBLIC_KEY_INFO, PublicKey),
CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
offsetof(CERT_PUBLIC_KEY_INFO, PublicKey.pbData) },
};
PCERT_PUBLIC_KEY_INFO info = pvStructInfo;
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, info ? info->Algorithm.Parameters.pbData : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodePubKeyInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
__TRY
{
DWORD bytesNeeded = 0;
if ((ret = CRYPT_AsnDecodePubKeyInfoInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL)))
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
PCERT_PUBLIC_KEY_INFO info;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
info = pvStructInfo;
info->Algorithm.Parameters.pbData = (BYTE *)pvStructInfo +
sizeof(CERT_PUBLIC_KEY_INFO);
ret = CRYPT_AsnDecodePubKeyInfoInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, info);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeBool(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
if (cbEncoded < 3)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
return FALSE;
}
if (GET_LEN_BYTES(pbEncoded[1]) > 1)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
return FALSE;
}
if (pbEncoded[1] > 1)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
return FALSE;
}
if (pcbDecoded)
*pcbDecoded = 3;
if (!pvStructInfo)
{
*pcbStructInfo = sizeof(BOOL);
ret = TRUE;
}
else if (*pcbStructInfo < sizeof(BOOL))
{
*pcbStructInfo = sizeof(BOOL);
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pcbStructInfo = sizeof(BOOL);
*(BOOL *)pvStructInfo = pbEncoded[2] != 0;
ret = TRUE;
}
TRACE("returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeAltNameEntry(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
PCERT_ALT_NAME_ENTRY entry = pvStructInfo;
DWORD dataLen, lenBytes, bytesNeeded = sizeof(CERT_ALT_NAME_ENTRY);
BOOL ret;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
if (cbEncoded < 2)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
return FALSE;
}
lenBytes = GET_LEN_BYTES(pbEncoded[1]);
if (1 + lenBytes > cbEncoded)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
return FALSE;
}
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
switch (pbEncoded[0] & ASN_TYPE_MASK)
{
case 1: /* rfc822Name */
case 2: /* dNSName */
case 6: /* uniformResourceIdentifier */
if (memchr(pbEncoded + 1 + lenBytes, 0, dataLen))
{
SetLastError(CRYPT_E_ASN1_RULE);
ret = FALSE;
}
else
bytesNeeded += (dataLen + 1) * sizeof(WCHAR);
break;
case 4: /* directoryName */
case 7: /* iPAddress */
bytesNeeded += dataLen;
break;
case 8: /* registeredID */
ret = CRYPT_AsnDecodeOidIgnoreTag(pbEncoded, cbEncoded, 0, NULL,
&dataLen, NULL);
if (ret)
{
/* FIXME: ugly, shouldn't need to know internals of OID decode
* function to use it.
*/
bytesNeeded += dataLen - sizeof(LPSTR);
}
break;
case 0: /* otherName */
FIXME("%d: stub\n", pbEncoded[0] & ASN_TYPE_MASK);
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
break;
case 3: /* x400Address, unimplemented */
case 5: /* ediPartyName, unimplemented */
TRACE("type %d unimplemented\n", pbEncoded[0] & ASN_TYPE_MASK);
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
break;
default:
TRACE("type %d bad\n", pbEncoded[0] & ASN_TYPE_MASK);
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
if (ret)
{
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!entry)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pcbStructInfo = bytesNeeded;
/* MS used values one greater than the asn1 ones.. sigh */
entry->dwAltNameChoice = (pbEncoded[0] & ASN_TYPE_MASK) + 1;
switch (pbEncoded[0] & ASN_TYPE_MASK)
{
case 1: /* rfc822Name */
case 2: /* dNSName */
case 6: /* uniformResourceIdentifier */
{
DWORD i;
for (i = 0; i < dataLen; i++)
entry->pwszURL[i] = (WCHAR)pbEncoded[1 + lenBytes + i];
entry->pwszURL[i] = 0;
TRACE("URL is %p (%s)\n", entry->pwszURL,
debugstr_w(entry->pwszURL));
break;
}
case 4: /* directoryName */
/* The data are memory-equivalent with the IPAddress case,
* fall-through
*/
case 7: /* iPAddress */
/* The next data pointer is in the pwszURL spot, that is,
* the first 4 bytes. Need to move it to the next spot.
*/
entry->IPAddress.pbData = (LPBYTE)entry->pwszURL;
entry->IPAddress.cbData = dataLen;
memcpy(entry->IPAddress.pbData, pbEncoded + 1 + lenBytes,
dataLen);
break;
case 8: /* registeredID */
ret = CRYPT_AsnDecodeOidIgnoreTag(pbEncoded, cbEncoded, 0,
&entry->pszRegisteredID, &dataLen, NULL);
break;
}
}
}
}
return ret;
}
static BOOL CRYPT_AsnDecodeAltNameInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { 0,
offsetof(CERT_ALT_NAME_INFO, cAltEntry),
offsetof(CERT_ALT_NAME_INFO, rgAltEntry),
sizeof(CERT_ALT_NAME_INFO),
CRYPT_AsnDecodeAltNameEntry, sizeof(CERT_ALT_NAME_ENTRY), TRUE,
offsetof(CERT_ALT_NAME_ENTRY, pwszURL) };
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeAuthorityKeyId(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_CONTEXT | 0, offsetof(CERT_AUTHORITY_KEY_ID_INFO, KeyId),
CRYPT_AsnDecodeOctets, sizeof(CRYPT_DATA_BLOB),
TRUE, TRUE, offsetof(CERT_AUTHORITY_KEY_ID_INFO, KeyId.pbData), 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR| 1,
offsetof(CERT_AUTHORITY_KEY_ID_INFO, CertIssuer),
CRYPT_AsnDecodeOctets, sizeof(CERT_NAME_BLOB), TRUE, TRUE,
offsetof(CERT_AUTHORITY_KEY_ID_INFO, CertIssuer.pbData), 0 },
{ ASN_CONTEXT | 2, offsetof(CERT_AUTHORITY_KEY_ID_INFO,
CertSerialNumber), CRYPT_AsnDecodeIntegerInternal,
sizeof(CRYPT_INTEGER_BLOB), TRUE, TRUE,
offsetof(CERT_AUTHORITY_KEY_ID_INFO, CertSerialNumber.pbData), 0 },
};
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeAuthorityKeyId2(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_CONTEXT | 0, offsetof(CERT_AUTHORITY_KEY_ID2_INFO, KeyId),
CRYPT_AsnDecodeOctets, sizeof(CRYPT_DATA_BLOB),
TRUE, TRUE, offsetof(CERT_AUTHORITY_KEY_ID2_INFO, KeyId.pbData), 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR| 1,
offsetof(CERT_AUTHORITY_KEY_ID2_INFO, AuthorityCertIssuer),
CRYPT_AsnDecodeAltNameInternal, sizeof(CERT_ALT_NAME_INFO), TRUE,
TRUE, offsetof(CERT_AUTHORITY_KEY_ID2_INFO,
AuthorityCertIssuer.rgAltEntry), 0 },
{ ASN_CONTEXT | 2, offsetof(CERT_AUTHORITY_KEY_ID2_INFO,
AuthorityCertSerialNumber), CRYPT_AsnDecodeIntegerInternal,
sizeof(CRYPT_INTEGER_BLOB), TRUE, TRUE,
offsetof(CERT_AUTHORITY_KEY_ID2_INFO,
AuthorityCertSerialNumber.pbData), 0 },
};
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeAccessDescription(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
struct AsnDecodeSequenceItem items[] = {
{ 0, offsetof(CERT_ACCESS_DESCRIPTION, pszAccessMethod),
CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), FALSE, TRUE,
offsetof(CERT_ACCESS_DESCRIPTION, pszAccessMethod), 0 },
{ 0, offsetof(CERT_ACCESS_DESCRIPTION, AccessLocation),
CRYPT_AsnDecodeAltNameEntry, sizeof(CERT_ALT_NAME_ENTRY), FALSE,
TRUE, offsetof(CERT_ACCESS_DESCRIPTION, AccessLocation.pwszURL), 0 },
};
CERT_ACCESS_DESCRIPTION *descr = pvStructInfo;
return CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, descr ? descr->pszAccessMethod : NULL);
}
static BOOL WINAPI CRYPT_AsnDecodeAuthorityInfoAccess(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CERT_AUTHORITY_INFO_ACCESS, cAccDescr),
offsetof(CERT_AUTHORITY_INFO_ACCESS, rgAccDescr),
sizeof(CERT_AUTHORITY_INFO_ACCESS),
CRYPT_AsnDecodeAccessDescription, sizeof(CERT_ACCESS_DESCRIPTION),
TRUE, offsetof(CERT_ACCESS_DESCRIPTION, pszAccessMethod) };
CERT_AUTHORITY_INFO_ACCESS *info = pvStructInfo;
if (pvStructInfo && !(dwFlags & CRYPT_DECODE_ALLOC_FLAG))
info->rgAccDescr = (CERT_ACCESS_DESCRIPTION *)(info + 1);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, pDecodePara, pvStructInfo, pcbStructInfo, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodePKCSContent(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
DWORD dataLen;
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
/* The caller has already checked the tag, no need to check it again.
* Check the outer length is valid:
*/
if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD innerLen;
pbEncoded += 1 + lenBytes;
cbEncoded -= 1 + lenBytes;
if (dataLen == CMSG_INDEFINITE_LENGTH)
cbEncoded -= 2; /* space for 0 TLV */
/* Check the inner length is valid: */
if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded, &innerLen)))
{
DWORD decodedLen;
ret = CRYPT_AsnDecodeCopyBytes(pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pcbStructInfo, &decodedLen);
if (dataLen == CMSG_INDEFINITE_LENGTH)
{
if (*(pbEncoded + decodedLen) != 0 ||
*(pbEncoded + decodedLen + 1) != 0)
{
TRACE("expected 0 TLV, got {%02x,%02x}\n",
*(pbEncoded + decodedLen),
*(pbEncoded + decodedLen + 1));
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
decodedLen += 2;
}
if (ret && pcbDecoded)
{
*pcbDecoded = 1 + lenBytes + decodedLen;
TRACE("decoded %ld bytes\n", *pcbDecoded);
}
}
}
return ret;
}
static BOOL CRYPT_AsnDecodePKCSContentInfoInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
CRYPT_CONTENT_INFO *info = pvStructInfo;
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CRYPT_CONTENT_INFO, pszObjId),
CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
offsetof(CRYPT_CONTENT_INFO, pszObjId), 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 0,
offsetof(CRYPT_CONTENT_INFO, Content), CRYPT_AsnDecodePKCSContent,
sizeof(CRYPT_DER_BLOB), TRUE, TRUE,
offsetof(CRYPT_CONTENT_INFO, Content.pbData), 0 },
};
BOOL ret;
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, info ? info->pszObjId : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodePKCSContentInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
ret = CRYPT_AsnDecodePKCSContentInfoInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
if (ret && pvStructInfo)
{
ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, *pcbStructInfo);
if (ret)
{
CRYPT_CONTENT_INFO *info;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
info = pvStructInfo;
info->pszObjId = (LPSTR)((BYTE *)info +
sizeof(CRYPT_CONTENT_INFO));
ret = CRYPT_AsnDecodePKCSContentInfoInternal(pbEncoded,
cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
pcbStructInfo, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, info);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
return ret;
}
BOOL CRYPT_AsnDecodePKCSDigestedData(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
CRYPT_DIGESTED_DATA *digestedData, DWORD *pcbDigestedData)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CRYPT_DIGESTED_DATA, version),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
{ ASN_SEQUENCEOF, offsetof(CRYPT_DIGESTED_DATA, DigestAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CRYPT_DIGESTED_DATA, DigestAlgorithm.pszObjId),
0 },
{ ASN_SEQUENCEOF, offsetof(CRYPT_DIGESTED_DATA, ContentInfo),
CRYPT_AsnDecodePKCSContentInfoInternal,
sizeof(CRYPT_CONTENT_INFO), FALSE, TRUE, offsetof(CRYPT_DIGESTED_DATA,
ContentInfo.pszObjId), 0 },
{ ASN_OCTETSTRING, offsetof(CRYPT_DIGESTED_DATA, hash),
CRYPT_AsnDecodeOctets, sizeof(CRYPT_HASH_BLOB), FALSE, TRUE,
offsetof(CRYPT_DIGESTED_DATA, hash.pbData), 0 },
};
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, digestedData, pcbDigestedData,
NULL, NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeAltName(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
DWORD bytesNeeded = 0;
if ((ret = CRYPT_AsnDecodeAltNameInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL)))
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
CERT_ALT_NAME_INFO *name;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
name = pvStructInfo;
name->rgAltEntry = (PCERT_ALT_NAME_ENTRY)
((BYTE *)pvStructInfo + sizeof(CERT_ALT_NAME_INFO));
ret = CRYPT_AsnDecodeAltNameInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, name);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
struct PATH_LEN_CONSTRAINT
{
BOOL fPathLenConstraint;
DWORD dwPathLenConstraint;
};
static BOOL CRYPT_AsnDecodePathLenConstraint(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
DWORD bytesNeeded = sizeof(struct PATH_LEN_CONSTRAINT), size;
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
if (!pvStructInfo)
{
ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded, dwFlags, NULL,
&size, pcbDecoded);
*pcbStructInfo = bytesNeeded;
}
else if (*pcbStructInfo < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
*pcbStructInfo = bytesNeeded;
ret = FALSE;
}
else
{
struct PATH_LEN_CONSTRAINT *constraint = pvStructInfo;
*pcbStructInfo = bytesNeeded;
size = sizeof(constraint->dwPathLenConstraint);
ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded, dwFlags,
&constraint->dwPathLenConstraint, &size, pcbDecoded);
if (ret)
constraint->fPathLenConstraint = TRUE;
TRACE("got an int, dwPathLenConstraint is %ld\n",
constraint->dwPathLenConstraint);
}
TRACE("returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeSubtreeConstraints(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CERT_BASIC_CONSTRAINTS_INFO, cSubtreesConstraint),
offsetof(CERT_BASIC_CONSTRAINTS_INFO, rgSubtreesConstraint),
FINALMEMBERSIZE(CERT_BASIC_CONSTRAINTS_INFO, cSubtreesConstraint),
CRYPT_AsnDecodeCopyBytes, sizeof(CERT_NAME_BLOB), TRUE,
offsetof(CERT_NAME_BLOB, pbData) };
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
TRACE("Returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeBasicConstraints(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_BITSTRING, offsetof(CERT_BASIC_CONSTRAINTS_INFO, SubjectType),
CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
offsetof(CERT_BASIC_CONSTRAINTS_INFO, SubjectType.pbData), 0 },
{ ASN_INTEGER, offsetof(CERT_BASIC_CONSTRAINTS_INFO,
fPathLenConstraint), CRYPT_AsnDecodePathLenConstraint,
sizeof(struct PATH_LEN_CONSTRAINT), TRUE, FALSE, 0, 0 },
{ ASN_SEQUENCEOF, offsetof(CERT_BASIC_CONSTRAINTS_INFO,
cSubtreesConstraint), CRYPT_AsnDecodeSubtreeConstraints,
FINALMEMBERSIZE(CERT_BASIC_CONSTRAINTS_INFO, cSubtreesConstraint),
TRUE, TRUE,
offsetof(CERT_BASIC_CONSTRAINTS_INFO, rgSubtreesConstraint), 0 },
};
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeBasicConstraints2(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_BOOL, offsetof(CERT_BASIC_CONSTRAINTS2_INFO, fCA),
CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE, FALSE, 0, 0 },
{ ASN_INTEGER, offsetof(CERT_BASIC_CONSTRAINTS2_INFO,
fPathLenConstraint), CRYPT_AsnDecodePathLenConstraint,
sizeof(struct PATH_LEN_CONSTRAINT), TRUE, FALSE, 0, 0 },
};
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodePolicyQualifier(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CERT_POLICY_QUALIFIER_INFO,
pszPolicyQualifierId), CRYPT_AsnDecodeOidInternal, sizeof(LPSTR),
FALSE, TRUE, offsetof(CERT_POLICY_QUALIFIER_INFO, pszPolicyQualifierId),
0 },
{ 0, offsetof(CERT_POLICY_QUALIFIER_INFO, Qualifier),
CRYPT_AsnDecodeDerBlob, sizeof(CRYPT_OBJID_BLOB), TRUE, TRUE,
offsetof(CERT_POLICY_QUALIFIER_INFO, Qualifier.pbData), 0 },
};
BOOL ret;
CERT_POLICY_QUALIFIER_INFO *qualifier = pvStructInfo;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, qualifier ? qualifier->pszPolicyQualifierId : NULL);
return ret;
}
static BOOL CRYPT_AsnDecodePolicyQualifiers(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CERT_POLICY_INFO, cPolicyQualifier),
offsetof(CERT_POLICY_INFO, rgPolicyQualifier),
FINALMEMBERSIZE(CERT_POLICY_INFO, cPolicyQualifier),
CRYPT_AsnDecodePolicyQualifier, sizeof(CERT_POLICY_QUALIFIER_INFO), TRUE,
offsetof(CERT_POLICY_QUALIFIER_INFO, pszPolicyQualifierId) };
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
TRACE("Returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeCertPolicy(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CERT_POLICY_INFO, pszPolicyIdentifier),
CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), FALSE, TRUE,
offsetof(CERT_POLICY_INFO, pszPolicyIdentifier), 0 },
{ ASN_SEQUENCEOF, offsetof(CERT_POLICY_INFO, cPolicyQualifier),
CRYPT_AsnDecodePolicyQualifiers,
FINALMEMBERSIZE(CERT_POLICY_INFO, cPolicyQualifier), TRUE,
TRUE, offsetof(CERT_POLICY_INFO, rgPolicyQualifier), 0 },
};
CERT_POLICY_INFO *info = pvStructInfo;
BOOL ret;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, info ? info->pszPolicyIdentifier : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCertPolicies(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);
__TRY
{
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CERT_POLICIES_INFO, cPolicyInfo),
offsetof(CERT_POLICIES_INFO, rgPolicyInfo),
sizeof(CERT_POLICIES_INFO),
CRYPT_AsnDecodeCertPolicy, sizeof(CERT_POLICY_INFO), TRUE,
offsetof(CERT_POLICY_INFO, pszPolicyIdentifier) };
CERT_POLICIES_INFO *info = pvStructInfo;
if (pvStructInfo && !(dwFlags & CRYPT_DECODE_ALLOC_FLAG))
info->rgPolicyInfo = (CERT_POLICY_INFO *)(info + 1);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, pDecodePara, pvStructInfo, pcbStructInfo, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeCertPolicyMapping(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CERT_POLICY_MAPPING,
pszIssuerDomainPolicy), CRYPT_AsnDecodeOidInternal, sizeof(LPSTR),
FALSE, TRUE, offsetof(CERT_POLICY_MAPPING, pszIssuerDomainPolicy), 0 },
{ ASN_OBJECTIDENTIFIER, offsetof(CERT_POLICY_MAPPING,
pszSubjectDomainPolicy), CRYPT_AsnDecodeOidInternal, sizeof(LPSTR),
FALSE, TRUE, offsetof(CERT_POLICY_MAPPING, pszSubjectDomainPolicy), 0 },
};
CERT_POLICY_MAPPING *mapping = pvStructInfo;
BOOL ret;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, mapping ? mapping->pszIssuerDomainPolicy : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCertPolicyMappings(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);
__TRY
{
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CERT_POLICY_MAPPINGS_INFO, cPolicyMapping),
offsetof(CERT_POLICY_MAPPINGS_INFO, rgPolicyMapping),
sizeof(CERT_POLICY_MAPPING),
CRYPT_AsnDecodeCertPolicyMapping, sizeof(CERT_POLICY_MAPPING), TRUE,
offsetof(CERT_POLICY_MAPPING, pszIssuerDomainPolicy) };
CERT_POLICY_MAPPINGS_INFO *info = pvStructInfo;
if (pvStructInfo && !(dwFlags & CRYPT_DECODE_ALLOC_FLAG))
info->rgPolicyMapping = (CERT_POLICY_MAPPING *)(info + 1);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, pDecodePara, pvStructInfo, pcbStructInfo, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeRequireExplicit(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
DWORD skip, size = sizeof(skip);
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
if (pbEncoded[0] != (ASN_CONTEXT | 0))
{
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if ((ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded, dwFlags,
&skip, &size, pcbDecoded)))
{
DWORD bytesNeeded = MEMBERSIZE(CERT_POLICY_CONSTRAINTS_INFO,
fRequireExplicitPolicy, fInhibitPolicyMapping);
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
CERT_POLICY_CONSTRAINTS_INFO *info = CONTAINING_RECORD(pvStructInfo,
CERT_POLICY_CONSTRAINTS_INFO, fRequireExplicitPolicy);
*pcbStructInfo = bytesNeeded;
/* The BOOL is implicit: if the integer is present, then it's
* TRUE.
*/
info->fRequireExplicitPolicy = TRUE;
info->dwRequireExplicitPolicySkipCerts = skip;
}
}
return ret;
}
static BOOL CRYPT_AsnDecodeInhibitMapping(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
DWORD skip, size = sizeof(skip);
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
if (pbEncoded[0] != (ASN_CONTEXT | 1))
{
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if ((ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded, dwFlags,
&skip, &size, pcbDecoded)))
{
DWORD bytesNeeded = FINALMEMBERSIZE(CERT_POLICY_CONSTRAINTS_INFO,
fInhibitPolicyMapping);
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
CERT_POLICY_CONSTRAINTS_INFO *info = CONTAINING_RECORD(pvStructInfo,
CERT_POLICY_CONSTRAINTS_INFO, fInhibitPolicyMapping);
*pcbStructInfo = bytesNeeded;
/* The BOOL is implicit: if the integer is present, then it's
* TRUE.
*/
info->fInhibitPolicyMapping = TRUE;
info->dwInhibitPolicyMappingSkipCerts = skip;
}
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCertPolicyConstraints(
DWORD dwCertEncodingType, LPCSTR lpszStructType, const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_CONTEXT | 0,
offsetof(CERT_POLICY_CONSTRAINTS_INFO, fRequireExplicitPolicy),
CRYPT_AsnDecodeRequireExplicit,
MEMBERSIZE(CERT_POLICY_CONSTRAINTS_INFO, fRequireExplicitPolicy,
fInhibitPolicyMapping), TRUE, FALSE, 0, 0 },
{ ASN_CONTEXT | 1,
offsetof(CERT_POLICY_CONSTRAINTS_INFO, fInhibitPolicyMapping),
CRYPT_AsnDecodeInhibitMapping,
FINALMEMBERSIZE(CERT_POLICY_CONSTRAINTS_INFO, fInhibitPolicyMapping),
TRUE, FALSE, 0, 0 },
};
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
return ret;
}
#define RSA1_MAGIC 0x31415352
struct DECODED_RSA_PUB_KEY
{
CRYPT_INTEGER_BLOB pubexp;
CRYPT_INTEGER_BLOB modulus;
};
/* Helper function to decode an ASN.1 DER encoded RSA public key, writing the decoded
* key into 'decodedKey', and the length into 'size'. The memory
* for 'decodedKey' is allocated with 'CRYPT_DECODE_ALLOC_FLAG'
*/
static BOOL CRYPT_raw_decode_rsa_pub_key(struct DECODED_RSA_PUB_KEY **decodedKey,
DWORD *size, const BYTE *pbEncoded, DWORD cbEncoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(struct DECODED_RSA_PUB_KEY, modulus),
CRYPT_AsnDecodeUnsignedIntegerInternal, sizeof(CRYPT_INTEGER_BLOB),
FALSE, TRUE, offsetof(struct DECODED_RSA_PUB_KEY, modulus.pbData),
0 },
{ ASN_INTEGER, offsetof(struct DECODED_RSA_PUB_KEY, pubexp),
CRYPT_AsnDecodeUnsignedIntegerInternal, sizeof(CRYPT_INTEGER_BLOB),
FALSE, TRUE, offsetof(struct DECODED_RSA_PUB_KEY, pubexp.pbData),
0 },
};
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, CRYPT_DECODE_ALLOC_FLAG, NULL, decodedKey,
size, NULL, NULL);
if (ret && (*decodedKey)->pubexp.cbData > sizeof(DWORD))
{
WARN("Unexpected exponent length %lu.\n", (*decodedKey)->pubexp.cbData);
LocalFree(*decodedKey);
SetLastError(CRYPT_E_ASN1_LARGE);
ret = FALSE;
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeRsaPubKey_Bcrypt(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
struct DECODED_RSA_PUB_KEY *decodedKey = NULL;
DWORD size = 0;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
ret = CRYPT_raw_decode_rsa_pub_key(&decodedKey, &size, pbEncoded, cbEncoded);
if (ret)
{
/* Header, exponent, and modulus */
DWORD bytesNeeded = sizeof(BCRYPT_RSAKEY_BLOB) + decodedKey->pubexp.cbData +
decodedKey->modulus.cbData;
if (!pvStructInfo)
{
*pcbStructInfo = bytesNeeded;
ret = TRUE;
}
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
BCRYPT_RSAKEY_BLOB *hdr;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
hdr = pvStructInfo;
hdr->Magic = BCRYPT_RSAPUBLIC_MAGIC;
hdr->BitLength = decodedKey->modulus.cbData * 8;
hdr->cbPublicExp = decodedKey->pubexp.cbData;
hdr->cbModulus = decodedKey->modulus.cbData;
hdr->cbPrime1 = 0;
hdr->cbPrime2 = 0;
/* CNG_RSA_PUBLIC_KEY_BLOB always stores the exponent and modulus
* in big-endian format, so we need to convert from little-endian
*/
CRYPT_CopyReversed((BYTE *)pvStructInfo + sizeof(BCRYPT_RSAKEY_BLOB),
decodedKey->pubexp.pbData, hdr->cbPublicExp);
CRYPT_CopyReversed((BYTE *)pvStructInfo + sizeof(BCRYPT_RSAKEY_BLOB) +
hdr->cbPublicExp, decodedKey->modulus.pbData,
decodedKey->modulus.cbData);
}
LocalFree(decodedKey);
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeRsaPubKey(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
struct DECODED_RSA_PUB_KEY *decodedKey = NULL;
DWORD size = 0;
ret = CRYPT_raw_decode_rsa_pub_key(&decodedKey, &size, pbEncoded, cbEncoded);
if (ret)
{
DWORD bytesNeeded = sizeof(BLOBHEADER) + sizeof(RSAPUBKEY) +
decodedKey->modulus.cbData;
if (!pvStructInfo)
{
*pcbStructInfo = bytesNeeded;
}
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
BLOBHEADER *hdr;
RSAPUBKEY *rsaPubKey;
unsigned int i;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
hdr = pvStructInfo;
hdr->bType = PUBLICKEYBLOB;
hdr->bVersion = CUR_BLOB_VERSION;
hdr->reserved = 0;
hdr->aiKeyAlg = CALG_RSA_KEYX;
rsaPubKey = (RSAPUBKEY *)((BYTE *)pvStructInfo +
sizeof(BLOBHEADER));
rsaPubKey->magic = RSA1_MAGIC;
rsaPubKey->pubexp = 0;
assert(decodedKey->pubexp.cbData <= sizeof(rsaPubKey->pubexp));
for (i = 0; i < decodedKey->pubexp.cbData; ++i)
rsaPubKey->pubexp |= decodedKey->pubexp.pbData[i] << (i * 8);
rsaPubKey->bitlen = decodedKey->modulus.cbData * 8;
memcpy((BYTE *)pvStructInfo + sizeof(BLOBHEADER) +
sizeof(RSAPUBKEY), decodedKey->modulus.pbData,
decodedKey->modulus.cbData);
}
LocalFree(decodedKey);
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
#define RSA2_MAGIC 0x32415352
struct DECODED_RSA_PRIV_KEY
{
DWORD version;
DWORD pubexp;
CRYPT_INTEGER_BLOB modulus;
CRYPT_INTEGER_BLOB privexp;
CRYPT_INTEGER_BLOB prime1;
CRYPT_INTEGER_BLOB prime2;
CRYPT_INTEGER_BLOB exponent1;
CRYPT_INTEGER_BLOB exponent2;
CRYPT_INTEGER_BLOB coefficient;
};
static BOOL WINAPI CRYPT_AsnDecodeRsaPrivKey(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
DWORD halflen;
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(struct DECODED_RSA_PRIV_KEY, version),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
{ ASN_INTEGER, offsetof(struct DECODED_RSA_PRIV_KEY, modulus),
CRYPT_AsnDecodeUnsignedIntegerInternal, sizeof(CRYPT_INTEGER_BLOB),
FALSE, TRUE, offsetof(struct DECODED_RSA_PRIV_KEY, modulus.pbData),
0 },
{ ASN_INTEGER, offsetof(struct DECODED_RSA_PRIV_KEY, pubexp),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
{ ASN_INTEGER, offsetof(struct DECODED_RSA_PRIV_KEY, privexp),
CRYPT_AsnDecodeUnsignedIntegerInternal, sizeof(CRYPT_INTEGER_BLOB),
FALSE, TRUE, offsetof(struct DECODED_RSA_PRIV_KEY, privexp.pbData),
0 },
{ ASN_INTEGER, offsetof(struct DECODED_RSA_PRIV_KEY, prime1),
CRYPT_AsnDecodeUnsignedIntegerInternal, sizeof(CRYPT_INTEGER_BLOB),
FALSE, TRUE, offsetof(struct DECODED_RSA_PRIV_KEY, prime1.pbData),
0 },
{ ASN_INTEGER, offsetof(struct DECODED_RSA_PRIV_KEY, prime2),
CRYPT_AsnDecodeUnsignedIntegerInternal, sizeof(CRYPT_INTEGER_BLOB),
FALSE, TRUE, offsetof(struct DECODED_RSA_PRIV_KEY, prime2.pbData),
0 },
{ ASN_INTEGER, offsetof(struct DECODED_RSA_PRIV_KEY, exponent1),
CRYPT_AsnDecodeUnsignedIntegerInternal, sizeof(CRYPT_INTEGER_BLOB),
FALSE, TRUE, offsetof(struct DECODED_RSA_PRIV_KEY, exponent1.pbData),
0 },
{ ASN_INTEGER, offsetof(struct DECODED_RSA_PRIV_KEY, exponent2),
CRYPT_AsnDecodeUnsignedIntegerInternal, sizeof(CRYPT_INTEGER_BLOB),
FALSE, TRUE, offsetof(struct DECODED_RSA_PRIV_KEY, exponent2.pbData),
0 },
{ ASN_INTEGER, offsetof(struct DECODED_RSA_PRIV_KEY, coefficient),
CRYPT_AsnDecodeUnsignedIntegerInternal, sizeof(CRYPT_INTEGER_BLOB),
FALSE, TRUE, offsetof(struct DECODED_RSA_PRIV_KEY, coefficient.pbData),
0 },
};
struct DECODED_RSA_PRIV_KEY *decodedKey = NULL;
DWORD size = 0;
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, CRYPT_DECODE_ALLOC_FLAG, NULL, &decodedKey,
&size, NULL, NULL);
if (ret)
{
halflen = decodedKey->prime1.cbData;
if (halflen < decodedKey->prime2.cbData)
halflen = decodedKey->prime2.cbData;
if (halflen < decodedKey->exponent1.cbData)
halflen = decodedKey->exponent1.cbData;
if (halflen < decodedKey->exponent2.cbData)
halflen = decodedKey->exponent2.cbData;
if (halflen < decodedKey->coefficient.cbData)
halflen = decodedKey->coefficient.cbData;
if (halflen * 2 < decodedKey->modulus.cbData)
halflen = decodedKey->modulus.cbData / 2 + decodedKey->modulus.cbData % 2;
if (halflen * 2 < decodedKey->privexp.cbData)
halflen = decodedKey->privexp.cbData / 2 + decodedKey->privexp.cbData % 2;
if (ret)
{
DWORD bytesNeeded = sizeof(BLOBHEADER) + sizeof(RSAPUBKEY) +
(halflen * 9);
if (!pvStructInfo)
{
*pcbStructInfo = bytesNeeded;
ret = TRUE;
}
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
BLOBHEADER *hdr;
RSAPUBKEY *rsaPubKey;
BYTE *vardata;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
hdr = pvStructInfo;
hdr->bType = PRIVATEKEYBLOB;
hdr->bVersion = CUR_BLOB_VERSION;
hdr->reserved = 0;
hdr->aiKeyAlg = CALG_RSA_KEYX;
rsaPubKey = (RSAPUBKEY *)((BYTE *)pvStructInfo +
sizeof(BLOBHEADER));
rsaPubKey->magic = RSA2_MAGIC;
rsaPubKey->pubexp = decodedKey->pubexp;
rsaPubKey->bitlen = halflen * 16;
vardata = (BYTE*)(rsaPubKey + 1);
memset(vardata, 0, halflen * 9);
memcpy(vardata,
decodedKey->modulus.pbData, decodedKey->modulus.cbData);
memcpy(vardata + halflen * 2,
decodedKey->prime1.pbData, decodedKey->prime1.cbData);
memcpy(vardata + halflen * 3,
decodedKey->prime2.pbData, decodedKey->prime2.cbData);
memcpy(vardata + halflen * 4,
decodedKey->exponent1.pbData, decodedKey->exponent1.cbData);
memcpy(vardata + halflen * 5,
decodedKey->exponent2.pbData, decodedKey->exponent2.cbData);
memcpy(vardata + halflen * 6,
decodedKey->coefficient.pbData, decodedKey->coefficient.cbData);
memcpy(vardata + halflen * 7,
decodedKey->privexp.pbData, decodedKey->privexp.cbData);
}
}
LocalFree(decodedKey);
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeOctets(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
DWORD bytesNeeded, dataLen;
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
bytesNeeded = sizeof(CRYPT_DATA_BLOB);
else
bytesNeeded = dataLen + sizeof(CRYPT_DATA_BLOB);
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
*pcbStructInfo = bytesNeeded;
ret = FALSE;
}
else
{
CRYPT_DATA_BLOB *blob;
*pcbStructInfo = bytesNeeded;
blob = pvStructInfo;
blob->cbData = dataLen;
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
blob->pbData = (BYTE *)pbEncoded + 1 + lenBytes;
else
{
assert(blob->pbData);
if (blob->cbData)
memcpy(blob->pbData, pbEncoded + 1 + lenBytes,
blob->cbData);
}
}
}
return ret;
}
static BOOL CRYPT_AsnDecodeOctetStringInternal(const BYTE *encoded, DWORD encoded_size,
DWORD flags, void *buf, DWORD *buf_size, DWORD *ret_decoded)
{
DWORD decoded = 0, indefinite_len_depth = 0, len_size, len, bytes_needed;
CRYPT_DATA_BLOB *blob;
const BYTE *string;
while (encoded[0] == (ASN_CONSTRUCTOR | ASN_OCTETSTRING))
{
if (!CRYPT_GetLengthIndefinite(encoded, encoded_size, &len))
return FALSE;
len_size = GET_LEN_BYTES(encoded[1]);
encoded += 1 + len_size;
encoded_size -= 1 + len_size;
decoded += 1 + len_size;
if (len == CMSG_INDEFINITE_LENGTH)
{
indefinite_len_depth++;
if (encoded_size < 2)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
encoded_size -= 2;
decoded += 2;
}
}
if (encoded[0] != ASN_OCTETSTRING)
{
WARN("Unexpected tag %02x\n", encoded[0]);
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if (!CRYPT_GetLen(encoded, encoded_size, &len))
return FALSE;
len_size = GET_LEN_BYTES(encoded[1]);
decoded += 1 + len_size + len;
encoded_size -= 1 + len_size;
if (len > encoded_size)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
if (ret_decoded)
*ret_decoded = decoded;
encoded += 1 + len_size;
string = encoded;
encoded += len;
while (indefinite_len_depth--)
{
if (encoded[0] || encoded[1])
{
TRACE("expected 0 TLV, got %02x %02x\n", encoded[0], encoded[1]);
SetLastError(CRYPT_E_ASN1_CORRUPT);
return FALSE;
}
}
bytes_needed = sizeof(*blob);
if (!(flags & CRYPT_DECODE_NOCOPY_FLAG)) bytes_needed += len;
if (!buf)
{
*buf_size = bytes_needed;
return TRUE;
}
if (*buf_size < bytes_needed)
{
SetLastError(ERROR_MORE_DATA);
*buf_size = bytes_needed;
return FALSE;
}
*buf_size = bytes_needed;
blob = buf;
blob->cbData = len;
if (flags & CRYPT_DECODE_NOCOPY_FLAG)
blob->pbData = (BYTE*)string;
else if (blob->cbData)
memcpy(blob->pbData, string, blob->cbData);
if (ret_decoded)
*ret_decoded = decoded;
return TRUE;
}
static BOOL WINAPI CRYPT_AsnDecodeOctetString(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
return FALSE;
}
__TRY
{
DWORD bytesNeeded = 0;
if ((ret = CRYPT_AsnDecodeOctetStringInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL)))
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
CRYPT_DATA_BLOB *blob;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
blob = pvStructInfo;
blob->pbData = (BYTE *)pvStructInfo + sizeof(CRYPT_DATA_BLOB);
ret = CRYPT_AsnDecodeOctetStringInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, blob);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeBitsInternal(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
DWORD bytesNeeded, dataLen;
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
TRACE("(%p, %ld, 0x%08lx, %p, %ld, %p)\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
bytesNeeded = sizeof(CRYPT_BIT_BLOB);
else
bytesNeeded = dataLen - 1 + sizeof(CRYPT_BIT_BLOB);
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
CRYPT_BIT_BLOB *blob;
*pcbStructInfo = bytesNeeded;
blob = pvStructInfo;
blob->cbData = dataLen - 1;
blob->cUnusedBits = *(pbEncoded + 1 + lenBytes);
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
{
blob->pbData = (BYTE *)pbEncoded + 2 + lenBytes;
}
else
{
assert(blob->pbData);
if (blob->cbData)
{
BYTE mask = 0xff << blob->cUnusedBits;
memcpy(blob->pbData, pbEncoded + 2 + lenBytes,
blob->cbData);
blob->pbData[blob->cbData - 1] &= mask;
}
}
}
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeBits(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
TRACE("(%p, %ld, 0x%08lx, %p, %p, %p)\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo);
__TRY
{
DWORD bytesNeeded = 0;
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else if (pbEncoded[0] != ASN_BITSTRING)
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
else if ((ret = CRYPT_AsnDecodeBitsInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL)))
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
CRYPT_BIT_BLOB *blob;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
blob = pvStructInfo;
blob->pbData = (BYTE *)pvStructInfo + sizeof(CRYPT_BIT_BLOB);
ret = CRYPT_AsnDecodeBitsInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, blob);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
TRACE("returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
/* Ignores tag. Only allows integers 4 bytes or smaller in size. */
static BOOL CRYPT_AsnDecodeIntInternal(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (dataLen > sizeof(int))
{
SetLastError(CRYPT_E_ASN1_LARGE);
ret = FALSE;
}
else if (!pvStructInfo)
*pcbStructInfo = sizeof(int);
else if ((ret = CRYPT_DecodeCheckSpace(pcbStructInfo, sizeof(int))))
{
int val, i;
if (dataLen && pbEncoded[1 + lenBytes] & 0x80)
{
/* initialize to a negative value to sign-extend */
val = -1;
}
else
val = 0;
for (i = 0; i < dataLen; i++)
{
val <<= 8;
val |= pbEncoded[1 + lenBytes + i];
}
memcpy(pvStructInfo, &val, sizeof(int));
}
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeInt(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
DWORD bytesNeeded = 0;
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
ret = FALSE;
}
else if (pbEncoded[0] != ASN_INTEGER)
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
else
ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL);
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, pvStructInfo);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeIntegerInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
DWORD bytesNeeded, dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
bytesNeeded = dataLen + sizeof(CRYPT_INTEGER_BLOB);
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
CRYPT_INTEGER_BLOB *blob = pvStructInfo;
*pcbStructInfo = bytesNeeded;
blob->cbData = dataLen;
assert(blob->pbData);
if (blob->cbData)
{
DWORD i;
for (i = 0; i < blob->cbData; i++)
{
blob->pbData[i] = *(pbEncoded + 1 + lenBytes +
dataLen - i - 1);
}
}
}
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeInteger(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
DWORD bytesNeeded = 0;
if (pbEncoded[0] != ASN_INTEGER)
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
else
ret = CRYPT_AsnDecodeIntegerInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL);
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
CRYPT_INTEGER_BLOB *blob;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
blob = pvStructInfo;
blob->pbData = (BYTE *)pvStructInfo +
sizeof(CRYPT_INTEGER_BLOB);
ret = CRYPT_AsnDecodeIntegerInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, blob);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeUnsignedIntegerInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
if (pbEncoded[0] == ASN_INTEGER)
{
DWORD bytesNeeded, dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
bytesNeeded = dataLen + sizeof(CRYPT_INTEGER_BLOB);
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
CRYPT_INTEGER_BLOB *blob = pvStructInfo;
*pcbStructInfo = bytesNeeded;
blob->cbData = dataLen;
assert(blob->pbData);
/* remove leading zero byte if it exists */
if (blob->cbData && *(pbEncoded + 1 + lenBytes) == 0)
{
blob->cbData--;
blob->pbData++;
}
if (blob->cbData)
{
DWORD i;
for (i = 0; i < blob->cbData; i++)
{
blob->pbData[i] = *(pbEncoded + 1 + lenBytes +
dataLen - i - 1);
}
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeUnsignedInteger(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
DWORD bytesNeeded = 0;
if ((ret = CRYPT_AsnDecodeUnsignedIntegerInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL)))
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
CRYPT_INTEGER_BLOB *blob;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
blob = pvStructInfo;
blob->pbData = (BYTE *)pvStructInfo +
sizeof(CRYPT_INTEGER_BLOB);
ret = CRYPT_AsnDecodeUnsignedIntegerInternal(pbEncoded,
cbEncoded, dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, blob);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeEnumerated(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
if (!pvStructInfo)
{
*pcbStructInfo = sizeof(int);
return TRUE;
}
__TRY
{
if (pbEncoded[0] == ASN_ENUMERATED)
{
unsigned int val = 0, i;
if (cbEncoded <= 1)
{
SetLastError(CRYPT_E_ASN1_EOD);
ret = FALSE;
}
else if (pbEncoded[1] == 0)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
{
/* A little strange looking, but we have to accept a sign byte:
* 0xffffffff gets encoded as 0a 05 00 ff ff ff ff. Also,
* assuming a small length is okay here, it has to be in short
* form.
*/
if (pbEncoded[1] > sizeof(unsigned int) + 1)
{
SetLastError(CRYPT_E_ASN1_LARGE);
return FALSE;
}
for (i = 0; i < pbEncoded[1]; i++)
{
val <<= 8;
val |= pbEncoded[2 + i];
}
if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, sizeof(unsigned int))))
{
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
memcpy(pvStructInfo, &val, sizeof(unsigned int));
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
/* Modifies word, pbEncoded, and len, and magically sets a value ret to FALSE
* if it fails.
*/
#define CRYPT_TIME_GET_DIGITS(pbEncoded, len, numDigits, word) \
do { \
BYTE i; \
\
(word) = 0; \
for (i = 0; (len) > 0 && i < (numDigits); i++, (len)--) \
{ \
if (!isdigit(*(pbEncoded))) \
{ \
SetLastError(CRYPT_E_ASN1_CORRUPT); \
ret = FALSE; \
} \
else \
{ \
(word) *= 10; \
(word) += *(pbEncoded)++ - '0'; \
} \
} \
} while (0)
static BOOL CRYPT_AsnDecodeTimeZone(const BYTE *pbEncoded, DWORD len,
SYSTEMTIME *sysTime)
{
BOOL ret = TRUE;
if (len >= 3 && (*pbEncoded == '+' || *pbEncoded == '-'))
{
WORD hours, minutes = 0;
BYTE sign = *pbEncoded++;
len--;
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, hours);
if (ret && hours >= 24)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else if (len >= 2)
{
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, minutes);
if (ret && minutes >= 60)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
}
if (ret)
{
if (sign == '+')
{
sysTime->wHour += hours;
sysTime->wMinute += minutes;
}
else
{
if (hours > sysTime->wHour)
{
sysTime->wDay--;
sysTime->wHour = 24 - (hours - sysTime->wHour);
}
else
sysTime->wHour -= hours;
if (minutes > sysTime->wMinute)
{
sysTime->wHour--;
sysTime->wMinute = 60 - (minutes - sysTime->wMinute);
}
else
sysTime->wMinute -= minutes;
}
}
}
return ret;
}
#define MIN_ENCODED_TIME_LENGTH 10
static BOOL CRYPT_AsnDecodeUtcTimeInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = FALSE;
if (pbEncoded[0] == ASN_UTCTIME)
{
if (cbEncoded <= 1)
SetLastError(CRYPT_E_ASN1_EOD);
else if (pbEncoded[1] > 0x7f)
{
/* long-form date strings really can't be valid */
SetLastError(CRYPT_E_ASN1_CORRUPT);
}
else
{
SYSTEMTIME sysTime = { 0 };
BYTE len = pbEncoded[1];
if (len < MIN_ENCODED_TIME_LENGTH)
SetLastError(CRYPT_E_ASN1_CORRUPT);
else
{
ret = TRUE;
if (pcbDecoded)
*pcbDecoded = 2 + len;
pbEncoded += 2;
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wYear);
if (sysTime.wYear >= 50)
sysTime.wYear += 1900;
else
sysTime.wYear += 2000;
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wMonth);
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wDay);
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wHour);
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wMinute);
if (ret && len > 0)
{
if (len >= 2 && isdigit(*pbEncoded) &&
isdigit(*(pbEncoded + 1)))
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2,
sysTime.wSecond);
else if (isdigit(*pbEncoded))
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 1,
sysTime.wSecond);
if (ret)
ret = CRYPT_AsnDecodeTimeZone(pbEncoded, len,
&sysTime);
}
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = sizeof(FILETIME);
else if ((ret = CRYPT_DecodeCheckSpace(pcbStructInfo,
sizeof(FILETIME))))
ret = SystemTimeToFileTime(&sysTime, pvStructInfo);
}
}
}
}
else
SetLastError(CRYPT_E_ASN1_BADTAG);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeUtcTime(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
__TRY
{
DWORD bytesNeeded = 0;
ret = CRYPT_AsnDecodeUtcTimeInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL);
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, bytesNeeded)))
{
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
ret = CRYPT_AsnDecodeUtcTimeInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, pvStructInfo);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeGeneralizedTime(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = FALSE;
if (pbEncoded[0] == ASN_GENERALTIME)
{
if (cbEncoded <= 1)
SetLastError(CRYPT_E_ASN1_EOD);
else if (pbEncoded[1] > 0x7f)
{
/* long-form date strings really can't be valid */
SetLastError(CRYPT_E_ASN1_CORRUPT);
}
else
{
BYTE len = pbEncoded[1];
if (len < MIN_ENCODED_TIME_LENGTH)
SetLastError(CRYPT_E_ASN1_CORRUPT);
else
{
SYSTEMTIME sysTime = { 0 };
ret = TRUE;
if (pcbDecoded)
*pcbDecoded = 2 + len;
pbEncoded += 2;
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 4, sysTime.wYear);
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wMonth);
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wDay);
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wHour);
if (ret && len > 0)
{
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2,
sysTime.wMinute);
if (ret && len > 0)
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2,
sysTime.wSecond);
if (ret && len > 0 && (*pbEncoded == '.' ||
*pbEncoded == ','))
{
BYTE digits;
pbEncoded++;
len--;
/* workaround macro weirdness */
digits = min(len, 3);
CRYPT_TIME_GET_DIGITS(pbEncoded, len, digits,
sysTime.wMilliseconds);
}
if (ret)
ret = CRYPT_AsnDecodeTimeZone(pbEncoded, len,
&sysTime);
}
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = sizeof(FILETIME);
else if ((ret = CRYPT_DecodeCheckSpace(pcbStructInfo,
sizeof(FILETIME))))
ret = SystemTimeToFileTime(&sysTime, pvStructInfo);
}
}
}
}
else
SetLastError(CRYPT_E_ASN1_BADTAG);
return ret;
}
static BOOL CRYPT_AsnDecodeChoiceOfTimeInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
InternalDecodeFunc decode = NULL;
if (pbEncoded[0] == ASN_UTCTIME)
decode = CRYPT_AsnDecodeUtcTimeInternal;
else if (pbEncoded[0] == ASN_GENERALTIME)
decode = CRYPT_AsnDecodeGeneralizedTime;
if (decode)
ret = decode(pbEncoded, cbEncoded, dwFlags, pvStructInfo,
pcbStructInfo, pcbDecoded);
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeChoiceOfTime(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
DWORD bytesNeeded = 0;
ret = CRYPT_AsnDecodeChoiceOfTimeInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL);
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
ret = CRYPT_AsnDecodeChoiceOfTimeInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, pvStructInfo);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeSequenceOfAny(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
__TRY
{
if (pbEncoded[0] == ASN_SEQUENCEOF)
{
DWORD bytesNeeded, dataLen, remainingLen, cValue;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes;
const BYTE *ptr;
lenBytes = GET_LEN_BYTES(pbEncoded[1]);
bytesNeeded = sizeof(CRYPT_SEQUENCE_OF_ANY);
cValue = 0;
ptr = pbEncoded + 1 + lenBytes;
remainingLen = dataLen;
while (ret && remainingLen)
{
DWORD nextLen;
ret = CRYPT_GetLen(ptr, remainingLen, &nextLen);
if (ret)
{
DWORD nextLenBytes = GET_LEN_BYTES(ptr[1]);
remainingLen -= 1 + nextLenBytes + nextLen;
ptr += 1 + nextLenBytes + nextLen;
bytesNeeded += sizeof(CRYPT_DER_BLOB);
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += 1 + nextLenBytes + nextLen;
cValue++;
}
}
if (ret)
{
CRYPT_SEQUENCE_OF_ANY *seq;
BYTE *nextPtr;
DWORD i;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
seq = pvStructInfo;
seq->cValue = cValue;
seq->rgValue = (CRYPT_DER_BLOB *)((BYTE *)seq +
sizeof(*seq));
nextPtr = (BYTE *)seq->rgValue +
cValue * sizeof(CRYPT_DER_BLOB);
ptr = pbEncoded + 1 + lenBytes;
remainingLen = dataLen;
i = 0;
while (ret && remainingLen)
{
DWORD nextLen;
ret = CRYPT_GetLen(ptr, remainingLen, &nextLen);
if (ret)
{
DWORD nextLenBytes = GET_LEN_BYTES(ptr[1]);
seq->rgValue[i].cbData = 1 + nextLenBytes +
nextLen;
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
seq->rgValue[i].pbData = (BYTE *)ptr;
else
{
seq->rgValue[i].pbData = nextPtr;
memcpy(nextPtr, ptr, 1 + nextLenBytes +
nextLen);
nextPtr += 1 + nextLenBytes + nextLen;
}
remainingLen -= 1 + nextLenBytes + nextLen;
ptr += 1 + nextLenBytes + nextLen;
i++;
}
}
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, seq);
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeDistPointName(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
if (pbEncoded[0] == (ASN_CONTEXT | ASN_CONSTRUCTOR | 0))
{
DWORD bytesNeeded = 0, dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
struct AsnArrayDescriptor arrayDesc = {
ASN_CONTEXT | ASN_CONSTRUCTOR | 0,
offsetof(CRL_DIST_POINT_NAME, FullName.cAltEntry),
offsetof(CRL_DIST_POINT_NAME, FullName.rgAltEntry),
FINALMEMBERSIZE(CRL_DIST_POINT_NAME, FullName),
CRYPT_AsnDecodeAltNameEntry, sizeof(CERT_ALT_NAME_ENTRY), TRUE,
offsetof(CERT_ALT_NAME_ENTRY, pwszURL) };
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD nameLen;
if (dataLen)
{
ret = CRYPT_AsnDecodeArray(&arrayDesc,
pbEncoded + 1 + lenBytes, cbEncoded - 1 - lenBytes,
dwFlags, NULL, NULL, &nameLen, NULL);
bytesNeeded = sizeof(CRL_DIST_POINT_NAME) + nameLen -
FINALMEMBERSIZE(CRL_DIST_POINT_NAME, FullName);
}
else
bytesNeeded = sizeof(CRL_DIST_POINT_NAME);
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
CRL_DIST_POINT_NAME *name = pvStructInfo;
*pcbStructInfo = bytesNeeded;
if (dataLen)
{
name->dwDistPointNameChoice = CRL_DIST_POINT_FULL_NAME;
ret = CRYPT_AsnDecodeArray(&arrayDesc,
pbEncoded + 1 + lenBytes, cbEncoded - 1 - lenBytes,
dwFlags, NULL, &name->FullName.cAltEntry, &nameLen,
NULL);
}
else
name->dwDistPointNameChoice = CRL_DIST_POINT_NO_NAME;
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
return ret;
}
static BOOL CRYPT_AsnDecodeDistPoint(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 0, offsetof(CRL_DIST_POINT,
DistPointName), CRYPT_AsnDecodeDistPointName,
sizeof(CRL_DIST_POINT_NAME), TRUE, TRUE, offsetof(CRL_DIST_POINT,
DistPointName.FullName.rgAltEntry), 0 },
{ ASN_CONTEXT | 1, offsetof(CRL_DIST_POINT, ReasonFlags),
CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
offsetof(CRL_DIST_POINT, ReasonFlags.pbData), 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 2, offsetof(CRL_DIST_POINT, CRLIssuer),
CRYPT_AsnDecodeAltNameInternal, sizeof(CERT_ALT_NAME_INFO), TRUE, TRUE,
offsetof(CRL_DIST_POINT, CRLIssuer.rgAltEntry), 0 },
};
CRL_DIST_POINT *point = pvStructInfo;
BOOL ret;
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, point ? point->DistPointName.FullName.rgAltEntry : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCRLDistPoints(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CRL_DIST_POINTS_INFO, cDistPoint),
offsetof(CRL_DIST_POINTS_INFO, rgDistPoint),
sizeof(CRL_DIST_POINTS_INFO),
CRYPT_AsnDecodeDistPoint, sizeof(CRL_DIST_POINT), TRUE,
offsetof(CRL_DIST_POINT, DistPointName.FullName.rgAltEntry) };
CRL_DIST_POINTS_INFO *info = pvStructInfo;
if (pvStructInfo && !(dwFlags & CRYPT_DECODE_ALLOC_FLAG))
info->rgDistPoint = (CRL_DIST_POINT *)(info + 1);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, pDecodePara, pvStructInfo, pcbStructInfo, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeEnhancedKeyUsage(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(CERT_ENHKEY_USAGE, cUsageIdentifier),
offsetof(CERT_ENHKEY_USAGE, rgpszUsageIdentifier),
sizeof(CERT_ENHKEY_USAGE),
CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), TRUE, 0 };
CERT_ENHKEY_USAGE *usage = pvStructInfo;
if (pvStructInfo && !(dwFlags & CRYPT_DECODE_ALLOC_FLAG))
usage->rgpszUsageIdentifier = (LPSTR *)(usage + 1);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, pDecodePara, pvStructInfo, pcbStructInfo, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeIssuingDistPoint(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 0, offsetof(CRL_ISSUING_DIST_POINT,
DistPointName), CRYPT_AsnDecodeDistPointName,
sizeof(CRL_DIST_POINT_NAME), TRUE, TRUE,
offsetof(CRL_ISSUING_DIST_POINT,
DistPointName.FullName.rgAltEntry), 0 },
{ ASN_CONTEXT | 1, offsetof(CRL_ISSUING_DIST_POINT,
fOnlyContainsUserCerts), CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE,
FALSE, 0 },
{ ASN_CONTEXT | 2, offsetof(CRL_ISSUING_DIST_POINT,
fOnlyContainsCACerts), CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE,
FALSE, 0 },
{ ASN_CONTEXT | 3, offsetof(CRL_ISSUING_DIST_POINT,
OnlySomeReasonFlags), CRYPT_AsnDecodeBitsInternal,
sizeof(CRYPT_BIT_BLOB), TRUE, TRUE, offsetof(CRL_ISSUING_DIST_POINT,
OnlySomeReasonFlags.pbData), 0 },
{ ASN_CONTEXT | 4, offsetof(CRL_ISSUING_DIST_POINT,
fIndirectCRL), CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE, FALSE, 0 },
};
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeMaximum(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
DWORD max, size = sizeof(max);
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
if (pbEncoded[0] != (ASN_CONTEXT | 1))
{
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if ((ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded, dwFlags,
&max, &size, pcbDecoded)))
{
DWORD bytesNeeded = FINALMEMBERSIZE(CERT_GENERAL_SUBTREE, fMaximum);
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
CERT_GENERAL_SUBTREE *subtree = CONTAINING_RECORD(pvStructInfo,
CERT_GENERAL_SUBTREE, fMaximum);
*pcbStructInfo = bytesNeeded;
/* The BOOL is implicit: if the integer is present, then it's
* TRUE.
*/
subtree->fMaximum = TRUE;
subtree->dwMaximum = max;
}
}
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodeSubtree(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ 0, offsetof(CERT_GENERAL_SUBTREE, Base),
CRYPT_AsnDecodeAltNameEntry, sizeof(CERT_ALT_NAME_ENTRY), TRUE, TRUE,
offsetof(CERT_ALT_NAME_ENTRY, pwszURL), 0 },
{ ASN_CONTEXT | 0, offsetof(CERT_GENERAL_SUBTREE, dwMinimum),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), TRUE, FALSE, 0, 0 },
{ ASN_CONTEXT | 1, offsetof(CERT_GENERAL_SUBTREE, fMaximum),
CRYPT_AsnDecodeMaximum, FINALMEMBERSIZE(CERT_GENERAL_SUBTREE, fMaximum),
TRUE, FALSE, 0, 0 },
};
CERT_GENERAL_SUBTREE *subtree = pvStructInfo;
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, subtree ? subtree->Base.pwszURL : NULL);
if (pcbDecoded)
{
TRACE("%ld\n", *pcbDecoded);
if (*pcbDecoded < cbEncoded)
TRACE("%02x %02x\n", *(pbEncoded + *pcbDecoded),
*(pbEncoded + *pcbDecoded + 1));
}
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodePermittedSubtree(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
struct AsnArrayDescriptor arrayDesc = { 0,
offsetof(CERT_NAME_CONSTRAINTS_INFO, cPermittedSubtree),
offsetof(CERT_NAME_CONSTRAINTS_INFO, rgPermittedSubtree),
MEMBERSIZE(CERT_NAME_CONSTRAINTS_INFO, cPermittedSubtree,
cExcludedSubtree),
CRYPT_AsnDecodeSubtree, sizeof(CERT_GENERAL_SUBTREE), TRUE,
offsetof(CERT_GENERAL_SUBTREE, Base.pwszURL) };
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL CRYPT_AsnDecodeExcludedSubtree(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
struct AsnArrayDescriptor arrayDesc = { 0,
offsetof(CERT_NAME_CONSTRAINTS_INFO, cExcludedSubtree),
offsetof(CERT_NAME_CONSTRAINTS_INFO, rgExcludedSubtree),
FINALMEMBERSIZE(CERT_NAME_CONSTRAINTS_INFO, cExcludedSubtree),
CRYPT_AsnDecodeSubtree, sizeof(CERT_GENERAL_SUBTREE), TRUE,
offsetof(CERT_GENERAL_SUBTREE, Base.pwszURL) };
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeNameConstraints(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 0,
offsetof(CERT_NAME_CONSTRAINTS_INFO, cPermittedSubtree),
CRYPT_AsnDecodePermittedSubtree,
MEMBERSIZE(CERT_NAME_CONSTRAINTS_INFO, cPermittedSubtree,
cExcludedSubtree), TRUE, TRUE,
offsetof(CERT_NAME_CONSTRAINTS_INFO, rgPermittedSubtree), 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 1,
offsetof(CERT_NAME_CONSTRAINTS_INFO, cExcludedSubtree),
CRYPT_AsnDecodeExcludedSubtree,
FINALMEMBERSIZE(CERT_NAME_CONSTRAINTS_INFO, cExcludedSubtree),
TRUE, TRUE,
offsetof(CERT_NAME_CONSTRAINTS_INFO, rgExcludedSubtree), 0 },
};
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeIssuerSerialNumber(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ 0, offsetof(CERT_ISSUER_SERIAL_NUMBER, Issuer), CRYPT_AsnDecodeDerBlob,
sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CERT_ISSUER_SERIAL_NUMBER,
Issuer.pbData) },
{ ASN_INTEGER, offsetof(CERT_ISSUER_SERIAL_NUMBER, SerialNumber),
CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB), FALSE,
TRUE, offsetof(CERT_ISSUER_SERIAL_NUMBER, SerialNumber.pbData), 0 },
};
CERT_ISSUER_SERIAL_NUMBER *issuerSerial = pvStructInfo;
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, issuerSerial ? issuerSerial->Issuer.pbData : NULL);
if (ret && issuerSerial && !issuerSerial->SerialNumber.cbData)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodePKCSSignerInfoInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
CMSG_SIGNER_INFO *info = pvStructInfo;
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CMSG_SIGNER_INFO, dwVersion),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
{ ASN_SEQUENCEOF, offsetof(CMSG_SIGNER_INFO, Issuer),
CRYPT_AsnDecodeIssuerSerialNumber, sizeof(CERT_ISSUER_SERIAL_NUMBER),
FALSE, TRUE, offsetof(CMSG_SIGNER_INFO, Issuer.pbData), 0 },
{ ASN_SEQUENCEOF, offsetof(CMSG_SIGNER_INFO, HashAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CMSG_SIGNER_INFO, HashAlgorithm.pszObjId), 0 },
{ ASN_CONSTRUCTOR | ASN_CONTEXT | 0,
offsetof(CMSG_SIGNER_INFO, AuthAttrs),
CRYPT_AsnDecodePKCSAttributesInternal, sizeof(CRYPT_ATTRIBUTES),
TRUE, TRUE, offsetof(CMSG_SIGNER_INFO, AuthAttrs.rgAttr), 0 },
{ ASN_SEQUENCEOF, offsetof(CMSG_SIGNER_INFO, HashEncryptionAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CMSG_SIGNER_INFO,
HashEncryptionAlgorithm.pszObjId), 0 },
{ ASN_OCTETSTRING, offsetof(CMSG_SIGNER_INFO, EncryptedHash),
CRYPT_AsnDecodeOctets, sizeof(CRYPT_DER_BLOB),
FALSE, TRUE, offsetof(CMSG_SIGNER_INFO, EncryptedHash.pbData), 0 },
{ ASN_CONSTRUCTOR | ASN_CONTEXT | 1,
offsetof(CMSG_SIGNER_INFO, UnauthAttrs),
CRYPT_AsnDecodePKCSAttributesInternal, sizeof(CRYPT_ATTRIBUTES),
TRUE, TRUE, offsetof(CMSG_SIGNER_INFO, UnauthAttrs.rgAttr), 0 },
};
BOOL ret;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, info ? info->Issuer.pbData : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodePKCSSignerInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
ret = CRYPT_AsnDecodePKCSSignerInfoInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
if (ret && pvStructInfo)
{
ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, *pcbStructInfo);
if (ret)
{
CMSG_SIGNER_INFO *info;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
info = pvStructInfo;
info->Issuer.pbData = ((BYTE *)info +
sizeof(CMSG_SIGNER_INFO));
ret = CRYPT_AsnDecodePKCSSignerInfoInternal(pbEncoded,
cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
pcbStructInfo, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, info);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("returning %d\n", ret);
return ret;
}
static BOOL verify_and_copy_certificate(const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
PCCERT_CONTEXT cert;
cert = CertCreateCertificateContext(X509_ASN_ENCODING, pbEncoded, cbEncoded);
if (!cert)
{
WARN("CertCreateCertificateContext error %#lx\n", GetLastError());
*pcbStructInfo = 0;
*pcbDecoded = 0;
return TRUE;
}
CertFreeCertificateContext(cert);
return CRYPT_AsnDecodeCopyBytes(pbEncoded, cbEncoded, dwFlags, pvStructInfo, pcbStructInfo, pcbDecoded);
}
static BOOL CRYPT_AsnDecodeCMSCertEncoded(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { 0,
offsetof(CRYPT_SIGNED_INFO, cCertEncoded),
offsetof(CRYPT_SIGNED_INFO, rgCertEncoded),
MEMBERSIZE(CRYPT_SIGNED_INFO, cCertEncoded, cCrlEncoded),
verify_and_copy_certificate,
sizeof(CRYPT_DER_BLOB), TRUE, offsetof(CRYPT_DER_BLOB, pbData) };
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pvStructInfo ? *pcbStructInfo : 0, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL CRYPT_AsnDecodeCMSCrlEncoded(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { 0,
offsetof(CRYPT_SIGNED_INFO, cCrlEncoded),
offsetof(CRYPT_SIGNED_INFO, rgCrlEncoded),
MEMBERSIZE(CRYPT_SIGNED_INFO, cCrlEncoded, content),
CRYPT_AsnDecodeCopyBytes, sizeof(CRYPT_DER_BLOB),
TRUE, offsetof(CRYPT_DER_BLOB, pbData) };
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pvStructInfo ? *pcbStructInfo : 0, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL CRYPT_AsnDecodeCMSSignerId(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
CERT_ID *id = pvStructInfo;
BOOL ret = FALSE;
if (*pbEncoded == ASN_SEQUENCEOF)
{
ret = CRYPT_AsnDecodeIssuerSerialNumber(pbEncoded, cbEncoded, dwFlags,
id ? &id->IssuerSerialNumber : NULL, pcbStructInfo, pcbDecoded);
if (ret)
{
if (id)
id->dwIdChoice = CERT_ID_ISSUER_SERIAL_NUMBER;
if (*pcbStructInfo > sizeof(CERT_ISSUER_SERIAL_NUMBER))
*pcbStructInfo = sizeof(CERT_ID) + *pcbStructInfo -
sizeof(CERT_ISSUER_SERIAL_NUMBER);
else
*pcbStructInfo = sizeof(CERT_ID);
}
}
else if (*pbEncoded == (ASN_CONTEXT | 0))
{
ret = CRYPT_AsnDecodeOctets(pbEncoded, cbEncoded, dwFlags,
id ? &id->KeyId : NULL, pcbStructInfo, pcbDecoded);
if (ret)
{
if (id)
id->dwIdChoice = CERT_ID_KEY_IDENTIFIER;
if (*pcbStructInfo > sizeof(CRYPT_DATA_BLOB))
*pcbStructInfo = sizeof(CERT_ID) + *pcbStructInfo -
sizeof(CRYPT_DATA_BLOB);
else
*pcbStructInfo = sizeof(CERT_ID);
}
}
else
SetLastError(CRYPT_E_ASN1_BADTAG);
return ret;
}
static BOOL CRYPT_AsnDecodeCMSSignerInfoInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
CMSG_CMS_SIGNER_INFO *info = pvStructInfo;
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CMSG_CMS_SIGNER_INFO, dwVersion),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
{ 0, offsetof(CMSG_CMS_SIGNER_INFO, SignerId),
CRYPT_AsnDecodeCMSSignerId, sizeof(CERT_ID), FALSE, TRUE,
offsetof(CMSG_CMS_SIGNER_INFO, SignerId.KeyId.pbData), 0 },
{ ASN_SEQUENCEOF, offsetof(CMSG_CMS_SIGNER_INFO, HashAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CMSG_CMS_SIGNER_INFO, HashAlgorithm.pszObjId), 0 },
{ ASN_CONSTRUCTOR | ASN_CONTEXT | 0,
offsetof(CMSG_CMS_SIGNER_INFO, AuthAttrs),
CRYPT_AsnDecodePKCSAttributesInternal, sizeof(CRYPT_ATTRIBUTES),
TRUE, TRUE, offsetof(CMSG_CMS_SIGNER_INFO, AuthAttrs.rgAttr), 0 },
{ ASN_SEQUENCEOF, offsetof(CMSG_CMS_SIGNER_INFO, HashEncryptionAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CMSG_CMS_SIGNER_INFO,
HashEncryptionAlgorithm.pszObjId), 0 },
{ ASN_OCTETSTRING, offsetof(CMSG_CMS_SIGNER_INFO, EncryptedHash),
CRYPT_AsnDecodeOctets, sizeof(CRYPT_DER_BLOB),
FALSE, TRUE, offsetof(CMSG_CMS_SIGNER_INFO, EncryptedHash.pbData), 0 },
{ ASN_CONSTRUCTOR | ASN_CONTEXT | 1,
offsetof(CMSG_CMS_SIGNER_INFO, UnauthAttrs),
CRYPT_AsnDecodePKCSAttributesInternal, sizeof(CRYPT_ATTRIBUTES),
TRUE, TRUE, offsetof(CMSG_CMS_SIGNER_INFO, UnauthAttrs.rgAttr), 0 },
};
BOOL ret;
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, info ? info->SignerId.KeyId.pbData : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCMSSignerInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
ret = CRYPT_AsnDecodeCMSSignerInfoInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
if (ret && pvStructInfo)
{
ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, *pcbStructInfo);
if (ret)
{
CMSG_CMS_SIGNER_INFO *info;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
info = pvStructInfo;
info->SignerId.KeyId.pbData = ((BYTE *)info +
sizeof(CMSG_CMS_SIGNER_INFO));
ret = CRYPT_AsnDecodeCMSSignerInfoInternal(pbEncoded,
cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
pcbStructInfo, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, info);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_DecodeSignerArray(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { ASN_CONSTRUCTOR | ASN_SETOF,
offsetof(CRYPT_SIGNED_INFO, cSignerInfo),
offsetof(CRYPT_SIGNED_INFO, rgSignerInfo),
FINALMEMBERSIZE(CRYPT_SIGNED_INFO, cSignerInfo),
CRYPT_AsnDecodeCMSSignerInfoInternal, sizeof(CMSG_CMS_SIGNER_INFO), TRUE,
offsetof(CMSG_CMS_SIGNER_INFO, SignerId.KeyId.pbData) };
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
BOOL CRYPT_AsnDecodeCMSSignedInfo(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
CRYPT_SIGNED_INFO *signedInfo, DWORD *pcbSignedInfo)
{
BOOL ret = FALSE;
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CRYPT_SIGNED_INFO, version),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
/* Placeholder for the hash algorithms - redundant with those in the
* signers, so just ignore them.
*/
{ ASN_CONSTRUCTOR | ASN_SETOF, 0, NULL, 0, TRUE, FALSE, 0, 0 },
{ ASN_SEQUENCE, offsetof(CRYPT_SIGNED_INFO, content),
CRYPT_AsnDecodePKCSContentInfoInternal, sizeof(CRYPT_CONTENT_INFO),
FALSE, TRUE, offsetof(CRYPT_SIGNED_INFO, content.pszObjId), 0 },
{ ASN_CONSTRUCTOR | ASN_CONTEXT | 0,
offsetof(CRYPT_SIGNED_INFO, cCertEncoded), CRYPT_AsnDecodeCMSCertEncoded,
MEMBERSIZE(CRYPT_SIGNED_INFO, cCertEncoded, cCrlEncoded), TRUE, TRUE,
offsetof(CRYPT_SIGNED_INFO, rgCertEncoded), 0 },
{ ASN_CONSTRUCTOR | ASN_CONTEXT | 1,
offsetof(CRYPT_SIGNED_INFO, cCrlEncoded), CRYPT_AsnDecodeCMSCrlEncoded,
MEMBERSIZE(CRYPT_SIGNED_INFO, cCrlEncoded, content), TRUE, TRUE,
offsetof(CRYPT_SIGNED_INFO, rgCrlEncoded), 0 },
{ ASN_CONSTRUCTOR | ASN_SETOF, offsetof(CRYPT_SIGNED_INFO, cSignerInfo),
CRYPT_DecodeSignerArray,
FINALMEMBERSIZE(CRYPT_SIGNED_INFO, cSignerInfo), TRUE, TRUE,
offsetof(CRYPT_SIGNED_INFO, rgSignerInfo), 0 },
};
TRACE("%p, %ld, %08lx, %p, %p, %p\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, signedInfo, pcbSignedInfo);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, signedInfo, pcbSignedInfo,
NULL, NULL);
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodeRecipientInfo(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
CMSG_KEY_TRANS_RECIPIENT_INFO *info = pvStructInfo;
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CMSG_KEY_TRANS_RECIPIENT_INFO, dwVersion),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
{ ASN_SEQUENCEOF, offsetof(CMSG_KEY_TRANS_RECIPIENT_INFO,
RecipientId.IssuerSerialNumber), CRYPT_AsnDecodeIssuerSerialNumber,
sizeof(CERT_ISSUER_SERIAL_NUMBER), FALSE, TRUE,
offsetof(CMSG_KEY_TRANS_RECIPIENT_INFO,
RecipientId.IssuerSerialNumber.Issuer.pbData), 0 },
{ ASN_SEQUENCEOF, offsetof(CMSG_KEY_TRANS_RECIPIENT_INFO,
KeyEncryptionAlgorithm), CRYPT_AsnDecodeAlgorithmId,
sizeof(CRYPT_ALGORITHM_IDENTIFIER), FALSE, TRUE,
offsetof(CMSG_KEY_TRANS_RECIPIENT_INFO,
KeyEncryptionAlgorithm.pszObjId), 0 },
{ ASN_OCTETSTRING, offsetof(CMSG_KEY_TRANS_RECIPIENT_INFO, EncryptedKey),
CRYPT_AsnDecodeOctets, sizeof(CRYPT_DATA_BLOB), FALSE, TRUE,
offsetof(CMSG_KEY_TRANS_RECIPIENT_INFO, EncryptedKey.pbData), 0 },
};
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, info ? info->RecipientId.IssuerSerialNumber.Issuer.pbData :
NULL);
if (info)
info->RecipientId.dwIdChoice = CERT_ID_ISSUER_SERIAL_NUMBER;
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_DecodeRecipientInfoArray(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { ASN_CONSTRUCTOR | ASN_SETOF,
offsetof(CRYPT_ENVELOPED_DATA, cRecipientInfo),
offsetof(CRYPT_ENVELOPED_DATA, rgRecipientInfo),
MEMBERSIZE(CRYPT_ENVELOPED_DATA, cRecipientInfo, encryptedContentInfo),
CRYPT_AsnDecodeRecipientInfo, sizeof(CMSG_KEY_TRANS_RECIPIENT_INFO), TRUE,
offsetof(CMSG_KEY_TRANS_RECIPIENT_INFO,
RecipientId.IssuerSerialNumber.Issuer.pbData) };
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodeEncryptedContentInfo(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
CRYPT_ENCRYPTED_CONTENT_INFO *info = pvStructInfo;
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CRYPT_ENCRYPTED_CONTENT_INFO,
contentType), CRYPT_AsnDecodeOidInternal, sizeof(LPSTR),
FALSE, TRUE, offsetof(CRYPT_ENCRYPTED_CONTENT_INFO,
contentType), 0 },
{ ASN_SEQUENCEOF, offsetof(CRYPT_ENCRYPTED_CONTENT_INFO,
contentEncryptionAlgorithm), CRYPT_AsnDecodeAlgorithmId,
sizeof(CRYPT_ALGORITHM_IDENTIFIER), FALSE, TRUE,
offsetof(CRYPT_ENCRYPTED_CONTENT_INFO,
contentEncryptionAlgorithm.pszObjId), 0 },
{ ASN_CONTEXT | 0, offsetof(CRYPT_ENCRYPTED_CONTENT_INFO,
encryptedContent), CRYPT_AsnDecodeOctets,
sizeof(CRYPT_DATA_BLOB), TRUE, TRUE,
offsetof(CRYPT_ENCRYPTED_CONTENT_INFO, encryptedContent.pbData) },
};
TRACE("%p, %ld, %08lx, %p, %ld, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, info ? info->contentType : NULL);
TRACE("returning %d\n", ret);
return ret;
}
BOOL CRYPT_AsnDecodePKCSEnvelopedData(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
CRYPT_ENVELOPED_DATA *envelopedData, DWORD *pcbEnvelopedData)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CRYPT_ENVELOPED_DATA, version),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
{ ASN_CONSTRUCTOR | ASN_SETOF, offsetof(CRYPT_ENVELOPED_DATA,
cRecipientInfo), CRYPT_DecodeRecipientInfoArray,
MEMBERSIZE(CRYPT_ENVELOPED_DATA, cRecipientInfo, encryptedContentInfo),
FALSE, TRUE, offsetof(CRYPT_ENVELOPED_DATA, rgRecipientInfo), 0 },
{ ASN_SEQUENCEOF, offsetof(CRYPT_ENVELOPED_DATA, encryptedContentInfo),
CRYPT_AsnDecodeEncryptedContentInfo,
sizeof(CRYPT_ENCRYPTED_CONTENT_INFO), FALSE, TRUE,
offsetof(CRYPT_ENVELOPED_DATA, encryptedContentInfo.contentType), 0 },
};
TRACE("%p, %ld, %08lx, %p, %p, %p\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, envelopedData, pcbEnvelopedData);
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, envelopedData,
pcbEnvelopedData, NULL, NULL);
TRACE("returning %d\n", ret);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeObjectIdentifier(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
CRYPT_DECODE_PARA *pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
DWORD bytesNeeded = 0;
BOOL ret;
__TRY
{
ret = CRYPT_AsnDecodeOidInternal(pbEncoded, cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG,
NULL, &bytesNeeded, NULL);
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo, pcbStructInfo, bytesNeeded)))
{
LPSTR *info;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
info = pvStructInfo;
*info = (void *)((BYTE *)info + sizeof(*info));
ret = CRYPT_AsnDecodeOidInternal(pbEncoded, cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG,
pvStructInfo, &bytesNeeded, NULL);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, info);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeEccSignature(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
CRYPT_DECODE_PARA *pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CERT_ECC_SIGNATURE, r),
CRYPT_AsnDecodeUnsignedIntegerInternal, sizeof(CRYPT_UINT_BLOB), FALSE,
TRUE, offsetof(CERT_ECC_SIGNATURE, r.pbData), 0 },
{ ASN_INTEGER, offsetof(CERT_ECC_SIGNATURE, s),
CRYPT_AsnDecodeUnsignedIntegerInternal, sizeof(CRYPT_UINT_BLOB), FALSE,
TRUE, offsetof(CERT_ECC_SIGNATURE, s.pbData), 0 },
};
__TRY
{
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeOCSPResponseStatus(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
if (pbEncoded[0] != ASN_ENUMERATED)
{
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
return CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded, dwFlags, pvStructInfo,
pcbStructInfo, pcbDecoded);
}
static BOOL CRYPT_AsnDecodeOCSPResponseBytes(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
DWORD dataLen;
BOOL ret;
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
if (pbEncoded[0] != (ASN_CONTEXT | ASN_CONSTRUCTOR))
{
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, 0,
CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
0, 0 },
{ ASN_OCTETSTRING, sizeof(LPSTR),
CRYPT_AsnDecodeOctets, sizeof(CRYPT_OBJID_BLOB), FALSE, TRUE,
sizeof(LPSTR) + offsetof(CRYPT_OBJID_BLOB, pbData), 0 },
};
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD bytesNeeded;
if (dataLen)
{
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded + 1 + lenBytes, cbEncoded - 1 - lenBytes, dwFlags, NULL,
pvStructInfo, pcbStructInfo, &bytesNeeded, NULL);
if (ret) *pcbDecoded = bytesNeeded + lenBytes + 1;
}
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeOCSPResponse(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
CRYPT_DECODE_PARA *pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_ENUMERATED, offsetof(OCSP_RESPONSE_INFO, dwStatus),
CRYPT_AsnDecodeOCSPResponseStatus, sizeof(DWORD), FALSE, FALSE,
0, 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR, offsetof(OCSP_RESPONSE_INFO, pszObjId),
CRYPT_AsnDecodeOCSPResponseBytes, sizeof(LPSTR) + sizeof(CRYPT_OBJID_BLOB), TRUE, TRUE,
offsetof(OCSP_RESPONSE_INFO, pszObjId), 0 },
};
__TRY
{
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeOCSPSignatureInfoCertEncoded(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { 0,
offsetof(OCSP_SIGNATURE_INFO, cCertEncoded), offsetof(OCSP_SIGNATURE_INFO, rgCertEncoded),
FINALMEMBERSIZE(OCSP_SIGNATURE_INFO, cCertEncoded), verify_and_copy_certificate,
sizeof(CRYPT_DER_BLOB), TRUE, offsetof(CRYPT_DER_BLOB, pbData) };
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeOCSPBasicSignedResponse(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
CRYPT_DECODE_PARA *pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ 0, offsetof(OCSP_BASIC_SIGNED_RESPONSE_INFO, ToBeSigned),
CRYPT_AsnDecodeDerBlob, sizeof(CRYPT_DER_BLOB), FALSE, TRUE,
offsetof(OCSP_BASIC_SIGNED_RESPONSE_INFO, ToBeSigned.pbData), 0 },
{ ASN_SEQUENCEOF, offsetof(OCSP_BASIC_SIGNED_RESPONSE_INFO, SignatureInfo.SignatureAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER), FALSE, TRUE,
offsetof(OCSP_BASIC_SIGNED_RESPONSE_INFO, SignatureInfo.SignatureAlgorithm.pszObjId), 0 },
{ ASN_BITSTRING, offsetof(OCSP_BASIC_SIGNED_RESPONSE_INFO, SignatureInfo.Signature),
CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
offsetof(OCSP_BASIC_SIGNED_RESPONSE_INFO, SignatureInfo.Signature.pbData) },
{ 0, offsetof(OCSP_BASIC_SIGNED_RESPONSE_INFO, SignatureInfo.cCertEncoded),
CRYPT_AsnDecodeOCSPSignatureInfoCertEncoded, FINALMEMBERSIZE(OCSP_SIGNATURE_INFO, cCertEncoded),
TRUE, TRUE, offsetof(OCSP_BASIC_SIGNED_RESPONSE_INFO, SignatureInfo.rgCertEncoded) },
};
__TRY
{
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeOCSPHashAlgorithm(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
DWORD dataLen;
BOOL ret;
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
if (pbEncoded[0] != ASN_SEQUENCEOF)
{
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD bytesDecoded;
if (dataLen)
{
ret = CRYPT_AsnDecodeAlgorithmId(pbEncoded + 1 + lenBytes, cbEncoded - 1 - lenBytes, dwFlags,
pvStructInfo, pcbStructInfo, &bytesDecoded);
if (ret) *pcbDecoded = bytesDecoded + lenBytes + 1;
}
}
return ret;
}
static BOOL CRYPT_AsnDecodeOCSPNextUpdate(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
DWORD dataLen;
BOOL ret;
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
if (pbEncoded[0] != (ASN_CONTEXT | ASN_CONSTRUCTOR))
{
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD bytesDecoded;
if (dataLen)
{
ret = CRYPT_AsnDecodeGeneralizedTime(pbEncoded + 1 + lenBytes, cbEncoded - 1 - lenBytes, dwFlags,
pvStructInfo, pcbStructInfo, &bytesDecoded);
if (ret) *pcbDecoded = bytesDecoded + lenBytes + 1;
}
}
return ret;
}
static BOOL CRYPT_AsnDecodeCertStatus(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
BYTE tag = pbEncoded[0] & ~3, status = pbEncoded[0] & 3;
DWORD bytesNeeded = FIELD_OFFSET(OCSP_BASIC_RESPONSE_ENTRY, ThisUpdate) -
FIELD_OFFSET(OCSP_BASIC_RESPONSE_ENTRY, dwCertStatus);
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
switch (status)
{
case 0:
if (tag != ASN_CONTEXT)
{
WARN("Unexpected tag %02x\n", tag);
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if (cbEncoded < 2 || pbEncoded[1])
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
return FALSE;
}
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
return FALSE;
}
if (pvStructInfo)
{
*(DWORD *)pvStructInfo = 0;
*(OCSP_BASIC_REVOKED_INFO **)((char *)pvStructInfo
+ FIELD_OFFSET(OCSP_BASIC_RESPONSE_ENTRY, pRevokedInfo)
- FIELD_OFFSET(OCSP_BASIC_RESPONSE_ENTRY, dwCertStatus)) = NULL;
}
*pcbStructInfo = bytesNeeded;
*pcbDecoded = 2;
break;
case 1:
{
DWORD dataLen;
if (tag != (ASN_CONTEXT | ASN_CONSTRUCTOR))
{
WARN("Unexpected tag %02x\n", tag);
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD bytesDecoded, size;
FILETIME date;
if (dataLen)
{
size = sizeof(date);
ret = CRYPT_AsnDecodeGeneralizedTime(pbEncoded + 1 + lenBytes, cbEncoded - 1 - lenBytes,
dwFlags, &date, &size, &bytesDecoded);
if (ret)
{
OCSP_BASIC_REVOKED_INFO *info;
bytesNeeded += sizeof(*info);
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
return FALSE;
}
if (pvStructInfo)
{
*(DWORD *)pvStructInfo = 1;
info = *(OCSP_BASIC_REVOKED_INFO **)((char *)pvStructInfo
+ FIELD_OFFSET(OCSP_BASIC_RESPONSE_ENTRY, pRevokedInfo)
- FIELD_OFFSET(OCSP_BASIC_RESPONSE_ENTRY, dwCertStatus));
info->RevocationDate = date;
}
*pcbStructInfo = bytesNeeded;
*pcbDecoded = 1 + lenBytes + bytesDecoded;
}
}
}
break;
}
default:
FIXME("Unhandled status %u\n", status);
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
return ret;
}
static BOOL CRYPT_AsnDecodeOCSPBasicResponseEntry(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_SEQUENCEOF, offsetof(OCSP_BASIC_RESPONSE_ENTRY, CertId.HashAlgorithm.pszObjId),
CRYPT_AsnDecodeOCSPHashAlgorithm, sizeof(CRYPT_ALGORITHM_IDENTIFIER), FALSE, TRUE,
offsetof(OCSP_BASIC_RESPONSE_ENTRY, CertId.HashAlgorithm.pszObjId), 0 },
{ ASN_OCTETSTRING, offsetof(OCSP_BASIC_RESPONSE_ENTRY, CertId.IssuerNameHash),
CRYPT_AsnDecodeOctets, sizeof(CRYPT_HASH_BLOB), FALSE, TRUE,
offsetof(OCSP_BASIC_RESPONSE_ENTRY, CertId.IssuerNameHash.pbData), 0 },
{ ASN_OCTETSTRING, offsetof(OCSP_BASIC_RESPONSE_ENTRY, CertId.IssuerKeyHash),
CRYPT_AsnDecodeOctets, sizeof(CRYPT_HASH_BLOB), FALSE, TRUE,
offsetof(OCSP_BASIC_RESPONSE_ENTRY, CertId.IssuerKeyHash.pbData), 0 },
{ ASN_INTEGER, offsetof(OCSP_BASIC_RESPONSE_ENTRY, CertId.SerialNumber),
CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB), FALSE, TRUE,
offsetof(OCSP_BASIC_RESPONSE_ENTRY, CertId.SerialNumber.pbData), 0 },
{ 0, offsetof(OCSP_BASIC_RESPONSE_ENTRY, dwCertStatus),
CRYPT_AsnDecodeCertStatus, sizeof(DWORD), FALSE, TRUE,
offsetof(OCSP_BASIC_RESPONSE_ENTRY, pRevokedInfo), 0 },
{ ASN_GENERALTIME, offsetof(OCSP_BASIC_RESPONSE_ENTRY, ThisUpdate),
CRYPT_AsnDecodeGeneralizedTime, sizeof(FILETIME), FALSE, FALSE,
0, 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR, offsetof(OCSP_BASIC_RESPONSE_ENTRY, NextUpdate),
CRYPT_AsnDecodeOCSPNextUpdate, sizeof(FILETIME), TRUE, FALSE,
0, 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR /* FIXME */, offsetof(OCSP_BASIC_RESPONSE_ENTRY, cExtension),
CRYPT_AsnDecodeCertExtensions, FINALMEMBERSIZE(OCSP_BASIC_RESPONSE_ENTRY, cExtension),
TRUE, TRUE, offsetof(OCSP_BASIC_RESPONSE_ENTRY, rgExtension), 0 },
};
return CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo,
pcbStructInfo, pcbDecoded, NULL);
}
static BOOL CRYPT_AsnDecodeOCSPBasicResponseEntriesArray(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
offsetof(OCSP_BASIC_RESPONSE_INFO, cResponseEntry), offsetof(OCSP_BASIC_RESPONSE_INFO, rgResponseEntry),
MEMBERSIZE(OCSP_BASIC_RESPONSE_INFO, cResponseEntry, cExtension),
CRYPT_AsnDecodeOCSPBasicResponseEntry, sizeof(OCSP_BASIC_RESPONSE_ENTRY),
FALSE, 0 };
return CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded,
dwFlags, NULL, pvStructInfo, pcbStructInfo, pcbDecoded);
}
static BOOL CRYPT_AsnDecodeResponderIDByName(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
OCSP_BASIC_RESPONSE_INFO *info = pvStructInfo;
DWORD dataLen, decodedLen, lenBytes, bytesNeeded = sizeof(*info);
BYTE tag = pbEncoded[0] & ~3;
CERT_NAME_BLOB *blob;
if (tag != (ASN_CONTEXT | ASN_CONSTRUCTOR))
{
WARN("Unexpected tag %02x\n", tag);
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if (!CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen))
return FALSE;
lenBytes = GET_LEN_BYTES(pbEncoded[1]);
cbEncoded -= 1 + lenBytes;
if (dataLen > cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
pbEncoded += 1 + lenBytes;
decodedLen = 1 + lenBytes + dataLen;
if (pbEncoded[0] != ASN_SEQUENCE)
{
WARN("Unexpected tag %02x %02x\n", pbEncoded[0], pbEncoded[1]);
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG)) bytesNeeded += dataLen;
if (pvStructInfo && *pcbStructInfo >= bytesNeeded)
{
info->dwResponderIdChoice = 1;
blob = &info->ByNameResponderId;
blob->cbData = dataLen;
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
blob->pbData = (BYTE *)pbEncoded;
else if (blob->cbData)
{
blob->pbData = (BYTE *)(info + 1);
memcpy(blob->pbData, pbEncoded, blob->cbData);
}
}
if (pcbDecoded)
*pcbDecoded = decodedLen;
if (!pvStructInfo)
{
*pcbStructInfo = bytesNeeded;
return TRUE;
}
if (*pcbStructInfo < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
*pcbStructInfo = bytesNeeded;
return FALSE;
}
*pcbStructInfo = bytesNeeded;
return TRUE;
}
static BOOL CRYPT_AsnDecodeResponderIDByKey(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
OCSP_BASIC_RESPONSE_INFO *info = pvStructInfo;
DWORD dataLen, decodedLen, lenBytes, bytesNeeded = sizeof(*info), len;
BYTE tag = pbEncoded[0] & ~3;
CRYPT_HASH_BLOB *blob;
if (tag != (ASN_CONTEXT | ASN_CONSTRUCTOR))
{
WARN("Unexpected tag %02x\n", tag);
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if (!CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen))
return FALSE;
lenBytes = GET_LEN_BYTES(pbEncoded[1]);
cbEncoded -= 1 + lenBytes;
decodedLen = 1 + lenBytes;
if (dataLen > cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
pbEncoded += 1 + lenBytes;
if (pbEncoded[0] != ASN_OCTETSTRING)
{
WARN("Unexpected tag %02x\n", pbEncoded[0]);
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if (!CRYPT_GetLen(pbEncoded, cbEncoded, &len))
return FALSE;
lenBytes = GET_LEN_BYTES(pbEncoded[1]);
decodedLen += 1 + lenBytes + len;
cbEncoded -= 1 + lenBytes;
if (len > cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
pbEncoded += 1 + lenBytes;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG)) bytesNeeded += len;
if (pvStructInfo && *pcbStructInfo >= bytesNeeded)
{
info->dwResponderIdChoice = 2;
blob = &info->ByKeyResponderId;
blob->cbData = len;
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
blob->pbData = (BYTE *)pbEncoded;
else if (blob->cbData)
{
blob->pbData = (BYTE *)(info + 1);
memcpy(blob->pbData, pbEncoded, blob->cbData);
}
}
if (pcbDecoded)
*pcbDecoded = decodedLen;
if (!pvStructInfo)
{
*pcbStructInfo = bytesNeeded;
return TRUE;
}
if (*pcbStructInfo < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
*pcbStructInfo = bytesNeeded;
return FALSE;
}
*pcbStructInfo = bytesNeeded;
return TRUE;
}
static BOOL CRYPT_AsnDecodeResponderID(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BYTE choice = pbEncoded[0] & 3;
TRACE("choice %02x\n", choice);
switch (choice)
{
case 1:
return CRYPT_AsnDecodeResponderIDByName(pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pcbStructInfo, pcbDecoded);
case 2:
return CRYPT_AsnDecodeResponderIDByKey(pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pcbStructInfo, pcbDecoded);
default:
WARN("Unexpected choice %02x\n", choice);
SetLastError(CRYPT_E_ASN1_CORRUPT);
return FALSE;
}
}
static BOOL WINAPI CRYPT_AsnDecodeOCSPBasicResponse(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
CRYPT_DECODE_PARA *pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
struct AsnDecodeSequenceItem items[] = {
{ 0, 0,
CRYPT_AsnDecodeResponderID, offsetof(OCSP_BASIC_RESPONSE_INFO, ProducedAt), FALSE, TRUE,
offsetof(OCSP_BASIC_RESPONSE_INFO, ByNameResponderId.pbData), 0 },
{ ASN_GENERALTIME, offsetof(OCSP_BASIC_RESPONSE_INFO, ProducedAt),
CRYPT_AsnDecodeGeneralizedTime, sizeof(FILETIME), FALSE, FALSE,
0, 0 },
{ ASN_SEQUENCEOF, offsetof(OCSP_BASIC_RESPONSE_INFO, cResponseEntry),
CRYPT_AsnDecodeOCSPBasicResponseEntriesArray, MEMBERSIZE(OCSP_BASIC_RESPONSE_INFO, cResponseEntry, cExtension),
TRUE, TRUE, offsetof(OCSP_BASIC_RESPONSE_INFO, rgResponseEntry) },
{ ASN_CONTEXT | ASN_CONSTRUCTOR, offsetof(OCSP_BASIC_RESPONSE_INFO, cExtension),
CRYPT_AsnDecodeCertExtensions, FINALMEMBERSIZE(OCSP_BASIC_RESPONSE_INFO, cExtension),
TRUE, TRUE, offsetof(OCSP_BASIC_RESPONSE_INFO, rgExtension), 0 },
};
BOOL ret;
__TRY
{
ret = CRYPT_AsnDecodeSequence(items, ARRAY_SIZE(items),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static CryptDecodeObjectExFunc CRYPT_GetBuiltinDecoder(DWORD dwCertEncodingType,
LPCSTR lpszStructType)
{
CryptDecodeObjectExFunc decodeFunc = NULL;
if ((dwCertEncodingType & CERT_ENCODING_TYPE_MASK) != X509_ASN_ENCODING
&& (dwCertEncodingType & CMSG_ENCODING_TYPE_MASK) != PKCS_7_ASN_ENCODING)
{
SetLastError(ERROR_FILE_NOT_FOUND);
return NULL;
}
if (IS_INTOID(lpszStructType))
{
switch (LOWORD(lpszStructType))
{
case LOWORD(X509_CERT):
decodeFunc = CRYPT_AsnDecodeCertSignedContent;
break;
case LOWORD(X509_CERT_TO_BE_SIGNED):
decodeFunc = CRYPT_AsnDecodeCert;
break;
case LOWORD(X509_CERT_CRL_TO_BE_SIGNED):
decodeFunc = CRYPT_AsnDecodeCRL;
break;
case LOWORD(X509_EXTENSIONS):
decodeFunc = CRYPT_AsnDecodeExtensions;
break;
case LOWORD(X509_NAME_VALUE):
decodeFunc = CRYPT_AsnDecodeNameValue;
break;
case LOWORD(X509_NAME):
decodeFunc = CRYPT_AsnDecodeName;
break;
case LOWORD(X509_PUBLIC_KEY_INFO):
decodeFunc = CRYPT_AsnDecodePubKeyInfo;
break;
case LOWORD(X509_AUTHORITY_KEY_ID):
decodeFunc = CRYPT_AsnDecodeAuthorityKeyId;
break;
case LOWORD(X509_ALTERNATE_NAME):
decodeFunc = CRYPT_AsnDecodeAltName;
break;
case LOWORD(X509_BASIC_CONSTRAINTS):
decodeFunc = CRYPT_AsnDecodeBasicConstraints;
break;
case LOWORD(X509_BASIC_CONSTRAINTS2):
decodeFunc = CRYPT_AsnDecodeBasicConstraints2;
break;
case LOWORD(X509_CERT_POLICIES):
decodeFunc = CRYPT_AsnDecodeCertPolicies;
break;
case LOWORD(RSA_CSP_PUBLICKEYBLOB):
decodeFunc = CRYPT_AsnDecodeRsaPubKey;
break;
case LOWORD(PKCS_RSA_PRIVATE_KEY):
decodeFunc = CRYPT_AsnDecodeRsaPrivKey;
break;
case LOWORD(X509_UNICODE_NAME):
decodeFunc = CRYPT_AsnDecodeUnicodeName;
break;
case LOWORD(PKCS_ATTRIBUTE):
decodeFunc = CRYPT_AsnDecodePKCSAttribute;
break;
case LOWORD(X509_UNICODE_NAME_VALUE):
decodeFunc = CRYPT_AsnDecodeUnicodeNameValue;
break;
case LOWORD(X509_OCTET_STRING):
decodeFunc = CRYPT_AsnDecodeOctetString;
break;
case LOWORD(X509_BITS):
case LOWORD(X509_KEY_USAGE):
decodeFunc = CRYPT_AsnDecodeBits;
break;
case LOWORD(X509_INTEGER):
decodeFunc = CRYPT_AsnDecodeInt;
break;
case LOWORD(X509_MULTI_BYTE_INTEGER):
decodeFunc = CRYPT_AsnDecodeInteger;
break;
case LOWORD(X509_MULTI_BYTE_UINT):
decodeFunc = CRYPT_AsnDecodeUnsignedInteger;
break;
case LOWORD(X509_ENUMERATED):
decodeFunc = CRYPT_AsnDecodeEnumerated;
break;
case LOWORD(X509_CHOICE_OF_TIME):
decodeFunc = CRYPT_AsnDecodeChoiceOfTime;
break;
case LOWORD(X509_AUTHORITY_KEY_ID2):
decodeFunc = CRYPT_AsnDecodeAuthorityKeyId2;
break;
case LOWORD(X509_AUTHORITY_INFO_ACCESS):
decodeFunc = CRYPT_AsnDecodeAuthorityInfoAccess;
break;
case LOWORD(PKCS_CONTENT_INFO):
decodeFunc = CRYPT_AsnDecodePKCSContentInfo;
break;
case LOWORD(X509_SEQUENCE_OF_ANY):
decodeFunc = CRYPT_AsnDecodeSequenceOfAny;
break;
case LOWORD(PKCS_UTC_TIME):
decodeFunc = CRYPT_AsnDecodeUtcTime;
break;
case LOWORD(X509_CRL_DIST_POINTS):
decodeFunc = CRYPT_AsnDecodeCRLDistPoints;
break;
case LOWORD(X509_ENHANCED_KEY_USAGE):
decodeFunc = CRYPT_AsnDecodeEnhancedKeyUsage;
break;
case LOWORD(PKCS_CTL):
decodeFunc = CRYPT_AsnDecodeCTL;
break;
case LOWORD(PKCS_SMIME_CAPABILITIES):
decodeFunc = CRYPT_AsnDecodeSMIMECapabilities;
break;
case LOWORD(X509_PKIX_POLICY_QUALIFIER_USERNOTICE):
decodeFunc = CRYPT_AsnDecodePolicyQualifierUserNotice;
break;
case LOWORD(PKCS_ATTRIBUTES):
decodeFunc = CRYPT_AsnDecodePKCSAttributes;
break;
case LOWORD(X509_ISSUING_DIST_POINT):
decodeFunc = CRYPT_AsnDecodeIssuingDistPoint;
break;
case LOWORD(X509_NAME_CONSTRAINTS):
decodeFunc = CRYPT_AsnDecodeNameConstraints;
break;
case LOWORD(X509_POLICY_MAPPINGS):
decodeFunc = CRYPT_AsnDecodeCertPolicyMappings;
break;
case LOWORD(X509_POLICY_CONSTRAINTS):
decodeFunc = CRYPT_AsnDecodeCertPolicyConstraints;
break;
case LOWORD(PKCS7_SIGNER_INFO):
decodeFunc = CRYPT_AsnDecodePKCSSignerInfo;
break;
case LOWORD(CMS_SIGNER_INFO):
decodeFunc = CRYPT_AsnDecodeCMSSignerInfo;
break;
case LOWORD(X509_OBJECT_IDENTIFIER):
decodeFunc = CRYPT_AsnDecodeObjectIdentifier;
break;
case LOWORD(X509_ECC_SIGNATURE):
decodeFunc = CRYPT_AsnDecodeEccSignature;
break;
case LOWORD(CNG_RSA_PUBLIC_KEY_BLOB):
decodeFunc = CRYPT_AsnDecodeRsaPubKey_Bcrypt;
break;
case LOWORD(OCSP_RESPONSE):
decodeFunc = CRYPT_AsnDecodeOCSPResponse;
break;
case LOWORD(OCSP_BASIC_SIGNED_RESPONSE):
decodeFunc = CRYPT_AsnDecodeOCSPBasicSignedResponse;
break;
case LOWORD(OCSP_BASIC_RESPONSE):
decodeFunc = CRYPT_AsnDecodeOCSPBasicResponse;
break;
default:
break;
}
}
else if (!strcmp(lpszStructType, szOID_CERT_EXTENSIONS))
decodeFunc = CRYPT_AsnDecodeExtensions;
else if (!strcmp(lpszStructType, szOID_RSA_signingTime))
decodeFunc = CRYPT_AsnDecodeUtcTime;
else if (!strcmp(lpszStructType, szOID_RSA_SMIMECapabilities))
decodeFunc = CRYPT_AsnDecodeSMIMECapabilities;
else if (!strcmp(lpszStructType, szOID_AUTHORITY_KEY_IDENTIFIER))
decodeFunc = CRYPT_AsnDecodeAuthorityKeyId;
else if (!strcmp(lpszStructType, szOID_LEGACY_POLICY_MAPPINGS))
decodeFunc = CRYPT_AsnDecodeCertPolicyMappings;
else if (!strcmp(lpszStructType, szOID_AUTHORITY_KEY_IDENTIFIER2))
decodeFunc = CRYPT_AsnDecodeAuthorityKeyId2;
else if (!strcmp(lpszStructType, szOID_CRL_REASON_CODE))
decodeFunc = CRYPT_AsnDecodeEnumerated;
else if (!strcmp(lpszStructType, szOID_KEY_USAGE))
decodeFunc = CRYPT_AsnDecodeBits;
else if (!strcmp(lpszStructType, szOID_SUBJECT_KEY_IDENTIFIER))
decodeFunc = CRYPT_AsnDecodeOctetString;
else if (!strcmp(lpszStructType, szOID_BASIC_CONSTRAINTS))
decodeFunc = CRYPT_AsnDecodeBasicConstraints;
else if (!strcmp(lpszStructType, szOID_BASIC_CONSTRAINTS2))
decodeFunc = CRYPT_AsnDecodeBasicConstraints2;
else if (!strcmp(lpszStructType, szOID_ISSUER_ALT_NAME))
decodeFunc = CRYPT_AsnDecodeAltName;
else if (!strcmp(lpszStructType, szOID_ISSUER_ALT_NAME2))
decodeFunc = CRYPT_AsnDecodeAltName;
else if (!strcmp(lpszStructType, szOID_NEXT_UPDATE_LOCATION))
decodeFunc = CRYPT_AsnDecodeAltName;
else if (!strcmp(lpszStructType, szOID_SUBJECT_ALT_NAME))
decodeFunc = CRYPT_AsnDecodeAltName;
else if (!strcmp(lpszStructType, szOID_SUBJECT_ALT_NAME2))
decodeFunc = CRYPT_AsnDecodeAltName;
else if (!strcmp(lpszStructType, szOID_CRL_DIST_POINTS))
decodeFunc = CRYPT_AsnDecodeCRLDistPoints;
else if (!strcmp(lpszStructType, szOID_CERT_POLICIES))
decodeFunc = CRYPT_AsnDecodeCertPolicies;
else if (!strcmp(lpszStructType, szOID_POLICY_MAPPINGS))
decodeFunc = CRYPT_AsnDecodeCertPolicyMappings;
else if (!strcmp(lpszStructType, szOID_POLICY_CONSTRAINTS))
decodeFunc = CRYPT_AsnDecodeCertPolicyConstraints;
else if (!strcmp(lpszStructType, szOID_ENHANCED_KEY_USAGE))
decodeFunc = CRYPT_AsnDecodeEnhancedKeyUsage;
else if (!strcmp(lpszStructType, szOID_ISSUING_DIST_POINT))
decodeFunc = CRYPT_AsnDecodeIssuingDistPoint;
else if (!strcmp(lpszStructType, szOID_NAME_CONSTRAINTS))
decodeFunc = CRYPT_AsnDecodeNameConstraints;
else if (!strcmp(lpszStructType, szOID_AUTHORITY_INFO_ACCESS))
decodeFunc = CRYPT_AsnDecodeAuthorityInfoAccess;
else if (!strcmp(lpszStructType, szOID_PKIX_POLICY_QUALIFIER_USERNOTICE))
decodeFunc = CRYPT_AsnDecodePolicyQualifierUserNotice;
else if (!strcmp(lpszStructType, szOID_CTL))
decodeFunc = CRYPT_AsnDecodeCTL;
else if (!strcmp(lpszStructType, szOID_ECC_PUBLIC_KEY))
decodeFunc = CRYPT_AsnDecodeObjectIdentifier;
return decodeFunc;
}
static CryptDecodeObjectFunc CRYPT_LoadDecoderFunc(DWORD dwCertEncodingType,
LPCSTR lpszStructType, HCRYPTOIDFUNCADDR *hFunc)
{
static HCRYPTOIDFUNCSET set = NULL;
CryptDecodeObjectFunc decodeFunc = NULL;
if (!set)
set = CryptInitOIDFunctionSet(CRYPT_OID_DECODE_OBJECT_FUNC, 0);
CryptGetOIDFunctionAddress(set, dwCertEncodingType, lpszStructType, 0,
(void **)&decodeFunc, hFunc);
return decodeFunc;
}
static CryptDecodeObjectExFunc CRYPT_LoadDecoderExFunc(DWORD dwCertEncodingType,
LPCSTR lpszStructType, HCRYPTOIDFUNCADDR *hFunc)
{
static HCRYPTOIDFUNCSET set = NULL;
CryptDecodeObjectExFunc decodeFunc = NULL;
if (!set)
set = CryptInitOIDFunctionSet(CRYPT_OID_DECODE_OBJECT_EX_FUNC, 0);
CryptGetOIDFunctionAddress(set, dwCertEncodingType, lpszStructType, 0,
(void **)&decodeFunc, hFunc);
return decodeFunc;
}
BOOL WINAPI CryptDecodeObject(DWORD dwCertEncodingType, LPCSTR lpszStructType,
const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo,
DWORD *pcbStructInfo)
{
return CryptDecodeObjectEx(dwCertEncodingType, lpszStructType,
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo);
}
BOOL WINAPI CryptDecodeObjectEx(DWORD dwCertEncodingType, LPCSTR lpszStructType,
const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
CryptDecodeObjectExFunc decodeFunc;
HCRYPTOIDFUNCADDR hFunc = NULL;
TRACE_(crypt)("(0x%08lx, %s, %p, %ld, 0x%08lx, %p, %p, %p)\n",
dwCertEncodingType, debugstr_a(lpszStructType), pbEncoded,
cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
if (!pvStructInfo && !pcbStructInfo)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
if (cbEncoded > MAX_ENCODED_LEN)
{
FIXME_(crypt)("Returning CRYPT_E_ASN1_LARGE, cbEncoded %lu.\n", cbEncoded);
SetLastError(CRYPT_E_ASN1_LARGE);
return FALSE;
}
SetLastError(NOERROR);
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
{
if (!pvStructInfo)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
*(BYTE **)pvStructInfo = NULL;
}
decodeFunc = CRYPT_GetBuiltinDecoder(dwCertEncodingType, lpszStructType);
if (!decodeFunc)
{
TRACE_(crypt)("OID %s not found or unimplemented, looking for DLL\n",
debugstr_a(lpszStructType));
decodeFunc = CRYPT_LoadDecoderExFunc(dwCertEncodingType, lpszStructType,
&hFunc);
if (!decodeFunc)
{
if (IS_INTOID(lpszStructType))
FIXME("Unimplemented decoder for lpszStructType OID %d\n", LOWORD(lpszStructType));
else
FIXME("Unsupported decoder for lpszStructType %s\n", lpszStructType);
}
}
if (decodeFunc)
ret = decodeFunc(dwCertEncodingType, lpszStructType, pbEncoded,
cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
else
{
CryptDecodeObjectFunc pCryptDecodeObject =
CRYPT_LoadDecoderFunc(dwCertEncodingType, lpszStructType, &hFunc);
/* Try CryptDecodeObject function. Don't call CryptDecodeObject
* directly, as that could cause an infinite loop.
*/
if (pCryptDecodeObject)
{
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
{
ret = pCryptDecodeObject(dwCertEncodingType, lpszStructType,
pbEncoded, cbEncoded, dwFlags, NULL, pcbStructInfo);
if (ret && (ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, *pcbStructInfo)))
{
ret = pCryptDecodeObject(dwCertEncodingType,
lpszStructType, pbEncoded, cbEncoded, dwFlags,
*(BYTE **)pvStructInfo, pcbStructInfo);
if (!ret)
CRYPT_FreeSpace(pDecodePara, *(BYTE **)pvStructInfo);
}
}
else
ret = pCryptDecodeObject(dwCertEncodingType, lpszStructType,
pbEncoded, cbEncoded, dwFlags, pvStructInfo, pcbStructInfo);
}
}
if (hFunc)
CryptFreeOIDFunctionAddress(hFunc, 0);
TRACE_(crypt)("returning %d\n", ret);
return ret;
}
BOOL WINAPI PFXIsPFXBlob(CRYPT_DATA_BLOB *pPFX)
{
BOOL ret;
TRACE_(crypt)("(%p)\n", pPFX);
/* A PFX blob is an asn.1-encoded sequence, consisting of at least a
* version integer of length 1 (3 encoded byes) and at least one other
* datum (two encoded bytes), plus at least two bytes for the outer
* sequence. Thus, even an empty PFX blob is at least 7 bytes in length.
*/
if (pPFX->cbData < 7)
ret = FALSE;
else if (pPFX->pbData[0] == ASN_SEQUENCE)
{
DWORD len;
if ((ret = CRYPT_GetLengthIndefinite(pPFX->pbData, pPFX->cbData, &len)))
{
BYTE lenLen = GET_LEN_BYTES(pPFX->pbData[1]);
/* Need at least three bytes for the integer version */
if (pPFX->cbData < 1 + lenLen + 3)
ret = FALSE;
else if (pPFX->pbData[1 + lenLen] != ASN_INTEGER || /* Tag */
pPFX->pbData[1 + lenLen + 1] != 1 || /* Definite length */
pPFX->pbData[1 + lenLen + 2] != 3) /* PFX version */
ret = FALSE;
}
}
else
ret = FALSE;
return ret;
}
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