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wine/dlls/crypt32/base64.c

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/*
* base64 encoder/decoder
*
* Copyright 2005 by Kai Blin
* Copyright 2006 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
*/
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "wincrypt.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(crypt);
#define CERT_HEADER "-----BEGIN CERTIFICATE-----"
#define CERT_HEADER_START "-----BEGIN "
#define CERT_DELIMITER "-----"
#define CERT_TRAILER "-----END CERTIFICATE-----"
#define CERT_TRAILER_START "-----END "
#define CERT_REQUEST_HEADER "-----BEGIN NEW CERTIFICATE REQUEST-----"
#define CERT_REQUEST_TRAILER "-----END NEW CERTIFICATE REQUEST-----"
#define X509_HEADER "-----BEGIN X509 CRL-----"
#define X509_TRAILER "-----END X509 CRL-----"
static const WCHAR CERT_HEADER_W[] = L"-----BEGIN CERTIFICATE-----";
static const WCHAR CERT_HEADER_START_W[] = L"-----BEGIN ";
static const WCHAR CERT_DELIMITER_W[] = L"-----";
static const WCHAR CERT_TRAILER_W[] = L"-----END CERTIFICATE-----";
static const WCHAR CERT_TRAILER_START_W[] = L"-----END ";
static const WCHAR CERT_REQUEST_HEADER_W[] = L"-----BEGIN NEW CERTIFICATE REQUEST-----";
static const WCHAR CERT_REQUEST_TRAILER_W[] = L"-----END NEW CERTIFICATE REQUEST-----";
static const WCHAR X509_HEADER_W[] = L"-----BEGIN X509 CRL-----";
static const WCHAR X509_TRAILER_W[] = L"-----END X509 CRL-----";
static const char b64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
typedef BOOL (*BinaryToStringAFunc)(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPSTR pszString, DWORD *pcchString);
typedef BOOL (*BinaryToStringWFunc)(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPWSTR pszString, DWORD *pcchString);
static BOOL EncodeBinaryToBinaryA(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPSTR pszString, DWORD *pcchString)
{
BOOL ret = TRUE;
if (pszString)
{
if (*pcchString < cbBinary)
{
SetLastError(ERROR_INSUFFICIENT_BUFFER);
ret = FALSE;
}
else if (cbBinary)
memcpy(pszString, pbBinary, cbBinary);
}
else
*pcchString = cbBinary;
return ret;
}
static DWORD stradd(LPSTR ptr, LPCSTR end, LPCSTR s, DWORD slen)
{
if (ptr + slen > end)
slen = end - ptr;
memcpy(ptr, s, slen);
return slen;
}
static DWORD encodeBase64A(const BYTE *in_buf, int in_len, LPCSTR sep,
char* out_buf, DWORD *out_len)
{
int div, i;
const BYTE *d = in_buf;
int bytes = (in_len*8 + 5)/6, pad_bytes = (bytes % 4) ? 4 - (bytes % 4) : 0;
LPSTR ptr;
LPCSTR end;
char chunk[4];
if (!out_buf)
{
TRACE("bytes is %d, pad bytes is %d\n", bytes, pad_bytes);
*out_len = bytes + pad_bytes;
*out_len += (*out_len / 64 + (*out_len % 64 ? 1 : 0)) * strlen(sep) + 1;
return 0;
}
/* Three bytes of input give 4 chars of output */
div = in_len / 3;
ptr = out_buf;
end = ptr + *out_len;
i = 0;
while (div > 0 && ptr < end)
{
if (i && i % 64 == 0)
ptr += stradd(ptr, end, sep, strlen(sep));
/* first char is the first 6 bits of the first byte*/
chunk[0] = b64[ ( d[0] >> 2) & 0x3f ];
/* second char is the last 2 bits of the first byte and the first 4
* bits of the second byte */
chunk[1] = b64[ ((d[0] << 4) & 0x30) | (d[1] >> 4 & 0x0f)];
/* third char is the last 4 bits of the second byte and the first 2
* bits of the third byte */
chunk[2] = b64[ ((d[1] << 2) & 0x3c) | (d[2] >> 6 & 0x03)];
/* fourth char is the remaining 6 bits of the third byte */
chunk[3] = b64[ d[2] & 0x3f];
ptr += stradd(ptr, end, chunk, 4);
i += 4;
d += 3;
div--;
}
switch(pad_bytes)
{
case 1:
/* first char is the first 6 bits of the first byte*/
chunk[0] = b64[ ( d[0] >> 2) & 0x3f ];
/* second char is the last 2 bits of the first byte and the first 4
* bits of the second byte */
chunk[1] = b64[ ((d[0] << 4) & 0x30) | (d[1] >> 4 & 0x0f)];
/* third char is the last 4 bits of the second byte padded with
* two zeroes */
chunk[2] = b64[ ((d[1] << 2) & 0x3c) ];
/* fourth char is a = to indicate one byte of padding */
chunk[3] = '=';
ptr += stradd(ptr, end, chunk, 4);
break;
case 2:
/* first char is the first 6 bits of the first byte*/
chunk[0] = b64[ ( d[0] >> 2) & 0x3f ];
/* second char is the last 2 bits of the first byte padded with
* four zeroes*/
chunk[1] = b64[ ((d[0] << 4) & 0x30)];
/* third char is = to indicate padding */
chunk[2] = '=';
/* fourth char is = to indicate padding */
chunk[3] = '=';
ptr += stradd(ptr, end, chunk, 4);
break;
}
ptr += stradd(ptr, end, sep, strlen(sep));
return ptr - out_buf;
}
static BOOL BinaryToBase64A(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPSTR pszString, DWORD *pcchString)
{
static const char crlf[] = "\r\n", lf[] = "\n";
BOOL ret = TRUE;
LPCSTR header = NULL, trailer = NULL, sep;
DWORD charsNeeded;
if (dwFlags & CRYPT_STRING_NOCR)
sep = lf;
else if (dwFlags & CRYPT_STRING_NOCRLF)
sep = "";
else
sep = crlf;
switch (dwFlags & 0x0fffffff)
{
case CRYPT_STRING_BASE64:
/* no header or footer */
break;
case CRYPT_STRING_BASE64HEADER:
header = CERT_HEADER;
trailer = CERT_TRAILER;
break;
case CRYPT_STRING_BASE64REQUESTHEADER:
header = CERT_REQUEST_HEADER;
trailer = CERT_REQUEST_TRAILER;
break;
case CRYPT_STRING_BASE64X509CRLHEADER:
header = X509_HEADER;
trailer = X509_TRAILER;
break;
}
charsNeeded = 0;
encodeBase64A(pbBinary, cbBinary, sep, NULL, &charsNeeded);
if (header)
charsNeeded += strlen(header) + strlen(sep);
if (trailer)
charsNeeded += strlen(trailer) + strlen(sep);
if (pszString)
{
LPSTR ptr = pszString;
DWORD size = *pcchString;
LPSTR end = ptr + size;
if (header)
{
ptr += stradd(ptr, end, header, strlen(header));
ptr += stradd(ptr, end, sep, strlen(sep));
size = end - ptr;
}
ptr += encodeBase64A(pbBinary, cbBinary, sep, ptr, &size);
if (trailer)
{
ptr += stradd(ptr, end, trailer, strlen(trailer));
ptr += stradd(ptr, end, sep, strlen(sep));
}
if (ptr < end)
*ptr = '\0';
if (charsNeeded <= *pcchString)
{
*pcchString = charsNeeded - 1;
}
else
{
*pcchString = charsNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
}
else
*pcchString = charsNeeded;
return ret;
}
static BOOL BinaryToHexRawA(const BYTE *bin, DWORD nbin, DWORD flags, char *str, DWORD *nstr)
{
static const char hex[] = "0123456789abcdef";
DWORD needed;
if (flags & CRYPT_STRING_NOCRLF)
needed = 0;
else if (flags & CRYPT_STRING_NOCR)
needed = 1;
else
needed = 2;
needed += nbin * 2 + 1;
if (!str)
{
*nstr = needed;
return TRUE;
}
if (needed > *nstr && *nstr < 3)
{
SetLastError(ERROR_MORE_DATA);
return FALSE;
}
nbin = min(nbin, (*nstr - 1) / 2);
while (nbin--)
{
*str++ = hex[(*bin >> 4) & 0xf];
*str++ = hex[*bin & 0xf];
bin++;
}
if (needed > *nstr)
{
*str = 0;
SetLastError(ERROR_MORE_DATA);
return FALSE;
}
if (flags & CRYPT_STRING_NOCR)
{
*str++ = '\n';
}
else if (!(flags & CRYPT_STRING_NOCRLF))
{
*str++ = '\r';
*str++ = '\n';
}
*str = 0;
*nstr = needed - 1;
return TRUE;
}
BOOL WINAPI CryptBinaryToStringA(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPSTR pszString, DWORD *pcchString)
{
BinaryToStringAFunc encoder = NULL;
TRACE("(%p, %ld, %08lx, %p, %p)\n", pbBinary, cbBinary, dwFlags, pszString,
pcchString);
if (!pbBinary)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
if (!pcchString)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
switch (dwFlags & 0x0fffffff)
{
case CRYPT_STRING_BINARY:
encoder = EncodeBinaryToBinaryA;
break;
case CRYPT_STRING_BASE64:
case CRYPT_STRING_BASE64HEADER:
case CRYPT_STRING_BASE64REQUESTHEADER:
case CRYPT_STRING_BASE64X509CRLHEADER:
encoder = BinaryToBase64A;
break;
case CRYPT_STRING_HEXRAW:
encoder = BinaryToHexRawA;
break;
case CRYPT_STRING_HEX:
case CRYPT_STRING_HEXASCII:
case CRYPT_STRING_HEXADDR:
case CRYPT_STRING_HEXASCIIADDR:
FIXME("Unimplemented type %ld\n", dwFlags & 0x0fffffff);
/* fall through */
default:
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
return encoder(pbBinary, cbBinary, dwFlags, pszString, pcchString);
}
static BOOL EncodeBinaryToBinaryW(const BYTE *in_buf, DWORD in_len, DWORD flags, WCHAR *out_buf, DWORD *out_len)
{
BOOL ret = TRUE;
if (out_buf)
{
if (*out_len < in_len)
{
SetLastError(ERROR_INSUFFICIENT_BUFFER);
ret = FALSE;
}
else if (in_len)
memcpy(out_buf, in_buf, in_len);
}
else
*out_len = in_len;
return ret;
}
static LONG encodeBase64W(const BYTE *in_buf, int in_len, LPCWSTR sep,
WCHAR* out_buf, DWORD *out_len)
{
int div, i;
const BYTE *d = in_buf;
int bytes = (in_len*8 + 5)/6, pad_bytes = (bytes % 4) ? 4 - (bytes % 4) : 0;
DWORD needed;
LPWSTR ptr;
TRACE("bytes is %d, pad bytes is %d\n", bytes, pad_bytes);
needed = bytes + pad_bytes;
needed += (needed / 64 + (needed % 64 ? 1 : 0)) * lstrlenW(sep);
needed++;
if (needed > *out_len)
{
*out_len = needed;
return ERROR_INSUFFICIENT_BUFFER;
}
else
*out_len = needed;
/* Three bytes of input give 4 chars of output */
div = in_len / 3;
ptr = out_buf;
i = 0;
while (div > 0)
{
if (i && i % 64 == 0)
{
lstrcpyW(ptr, sep);
ptr += lstrlenW(sep);
}
/* first char is the first 6 bits of the first byte*/
*ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
/* second char is the last 2 bits of the first byte and the first 4
* bits of the second byte */
*ptr++ = b64[ ((d[0] << 4) & 0x30) | (d[1] >> 4 & 0x0f)];
/* third char is the last 4 bits of the second byte and the first 2
* bits of the third byte */
*ptr++ = b64[ ((d[1] << 2) & 0x3c) | (d[2] >> 6 & 0x03)];
/* fourth char is the remaining 6 bits of the third byte */
*ptr++ = b64[ d[2] & 0x3f];
i += 4;
d += 3;
div--;
}
switch(pad_bytes)
{
case 1:
/* first char is the first 6 bits of the first byte*/
*ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
/* second char is the last 2 bits of the first byte and the first 4
* bits of the second byte */
*ptr++ = b64[ ((d[0] << 4) & 0x30) | (d[1] >> 4 & 0x0f)];
/* third char is the last 4 bits of the second byte padded with
* two zeroes */
*ptr++ = b64[ ((d[1] << 2) & 0x3c) ];
/* fourth char is a = to indicate one byte of padding */
*ptr++ = '=';
break;
case 2:
/* first char is the first 6 bits of the first byte*/
*ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
/* second char is the last 2 bits of the first byte padded with
* four zeroes*/
*ptr++ = b64[ ((d[0] << 4) & 0x30)];
/* third char is = to indicate padding */
*ptr++ = '=';
/* fourth char is = to indicate padding */
*ptr++ = '=';
break;
}
lstrcpyW(ptr, sep);
return ERROR_SUCCESS;
}
static BOOL BinaryToBase64W(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPWSTR pszString, DWORD *pcchString)
{
BOOL ret = TRUE;
LPCWSTR header = NULL, trailer = NULL, sep;
DWORD charsNeeded;
if (dwFlags & CRYPT_STRING_NOCR)
sep = L"\n";
else if (dwFlags & CRYPT_STRING_NOCRLF)
sep = L"";
else
sep = L"\r\n";
switch (dwFlags & 0x0fffffff)
{
case CRYPT_STRING_BASE64:
/* no header or footer */
break;
case CRYPT_STRING_BASE64HEADER:
header = CERT_HEADER_W;
trailer = CERT_TRAILER_W;
break;
case CRYPT_STRING_BASE64REQUESTHEADER:
header = CERT_REQUEST_HEADER_W;
trailer = CERT_REQUEST_TRAILER_W;
break;
case CRYPT_STRING_BASE64X509CRLHEADER:
header = X509_HEADER_W;
trailer = X509_TRAILER_W;
break;
}
charsNeeded = 0;
encodeBase64W(pbBinary, cbBinary, sep, NULL, &charsNeeded);
if (header)
charsNeeded += lstrlenW(header) + lstrlenW(sep);
if (trailer)
charsNeeded += lstrlenW(trailer) + lstrlenW(sep);
if (pszString)
{
if (charsNeeded <= *pcchString)
{
LPWSTR ptr = pszString;
DWORD size = charsNeeded;
if (header)
{
lstrcpyW(ptr, header);
ptr += lstrlenW(ptr);
lstrcpyW(ptr, sep);
ptr += lstrlenW(sep);
}
encodeBase64W(pbBinary, cbBinary, sep, ptr, &size);
ptr += size - 1;
if (trailer)
{
lstrcpyW(ptr, trailer);
ptr += lstrlenW(ptr);
lstrcpyW(ptr, sep);
}
*pcchString = charsNeeded - 1;
}
else
{
*pcchString = charsNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
}
else
*pcchString = charsNeeded;
return ret;
}
static BOOL BinaryToHexRawW(const BYTE *bin, DWORD nbin, DWORD flags, LPWSTR str, DWORD *nstr)
{
static const WCHAR hex[] = L"0123456789abcdef";
DWORD needed;
if (flags & CRYPT_STRING_NOCRLF)
needed = 0;
else if (flags & CRYPT_STRING_NOCR)
needed = 1;
else
needed = 2;
needed += nbin * 2 + 1;
if (!str)
{
*nstr = needed;
return TRUE;
}
if (needed > *nstr)
{
SetLastError(ERROR_MORE_DATA);
return FALSE;
}
while (nbin--)
{
*str++ = hex[(*bin >> 4) & 0xf];
*str++ = hex[*bin & 0xf];
bin++;
}
if (flags & CRYPT_STRING_NOCR)
*str++ = '\n';
else if (!(flags & CRYPT_STRING_NOCRLF))
{
*str++ = '\r';
*str++ = '\n';
}
*str = 0;
*nstr = needed - 1;
return TRUE;
}
static BOOL binary_to_hexW(const BYTE *bin, DWORD nbin, DWORD flags, LPWSTR str, DWORD *nstr)
{
static const WCHAR hex[] = L"0123456789abcdef";
DWORD needed, i;
needed = nbin * 3; /* spaces + terminating \0 */
if (flags & CRYPT_STRING_NOCR)
{
needed += (nbin + 7) / 16; /* space every 16 characters */
needed += 1; /* terminating \n */
}
else if (!(flags & CRYPT_STRING_NOCRLF))
{
needed += (nbin + 7) / 16; /* space every 16 characters */
needed += nbin / 16 + 1; /* LF every 16 characters + terminating \r */
if (nbin % 16)
needed += 1; /* terminating \n */
}
if (!str)
{
*nstr = needed;
return TRUE;
}
if (needed > *nstr)
{
SetLastError(ERROR_MORE_DATA);
return FALSE;
}
for (i = 0; i < nbin; i++)
{
*str++ = hex[(bin[i] >> 4) & 0xf];
*str++ = hex[bin[i] & 0xf];
if (i >= nbin - 1) break;
if (i && !(flags & CRYPT_STRING_NOCRLF))
{
if (!((i + 1) % 16))
{
if (flags & CRYPT_STRING_NOCR)
*str++ = '\n';
else
{
*str++ = '\r';
*str++ = '\n';
}
continue;
}
else if (!((i + 1) % 8))
*str++ = ' ';
}
*str++ = ' ';
}
if (flags & CRYPT_STRING_NOCR)
*str++ = '\n';
else if (!(flags & CRYPT_STRING_NOCRLF))
{
*str++ = '\r';
*str++ = '\n';
}
*str = 0;
*nstr = needed - 1;
return TRUE;
}
BOOL WINAPI CryptBinaryToStringW(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPWSTR pszString, DWORD *pcchString)
{
BinaryToStringWFunc encoder = NULL;
TRACE("(%p, %ld, %08lx, %p, %p)\n", pbBinary, cbBinary, dwFlags, pszString,
pcchString);
if (!pbBinary)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
if (!pcchString)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
switch (dwFlags & 0x0fffffff)
{
case CRYPT_STRING_BINARY:
encoder = EncodeBinaryToBinaryW;
break;
case CRYPT_STRING_BASE64:
case CRYPT_STRING_BASE64HEADER:
case CRYPT_STRING_BASE64REQUESTHEADER:
case CRYPT_STRING_BASE64X509CRLHEADER:
encoder = BinaryToBase64W;
break;
case CRYPT_STRING_HEXRAW:
encoder = BinaryToHexRawW;
break;
case CRYPT_STRING_HEX:
encoder = binary_to_hexW;
break;
case CRYPT_STRING_HEXASCII:
case CRYPT_STRING_HEXADDR:
case CRYPT_STRING_HEXASCIIADDR:
FIXME("Unimplemented type %ld\n", dwFlags & 0x0fffffff);
/* fall through */
default:
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
return encoder(pbBinary, cbBinary, dwFlags, pszString, pcchString);
}
#define BASE64_DECODE_PADDING 0x100
#define BASE64_DECODE_WHITESPACE 0x200
#define BASE64_DECODE_INVALID 0x300
static inline int decodeBase64Byte(int c)
{
int ret = BASE64_DECODE_INVALID;
if (c >= 'A' && c <= 'Z')
ret = c - 'A';
else if (c >= 'a' && c <= 'z')
ret = c - 'a' + 26;
else if (c >= '0' && c <= '9')
ret = c - '0' + 52;
else if (c == '+')
ret = 62;
else if (c == '/')
ret = 63;
else if (c == '=')
ret = BASE64_DECODE_PADDING;
else if (c == ' ' || c == '\t' || c == '\r' || c == '\n')
ret = BASE64_DECODE_WHITESPACE;
return ret;
}
/* Unlike CryptStringToBinaryA, cchString is guaranteed to be the length of the
* string to convert.
*/
typedef LONG (*StringToBinaryAFunc)(LPCSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags);
static LONG Base64ToBinary(const void* pszString, BOOL wide, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
DWORD cbIn, cbValid, cbOut, hasPadding;
BYTE block[4];
for (cbIn = cbValid = cbOut = hasPadding = 0; cbIn < cchString; ++cbIn)
{
int c = wide ? (int)((WCHAR*)pszString)[cbIn] : (int)((char*)pszString)[cbIn];
int d = decodeBase64Byte(c);
if (d == BASE64_DECODE_INVALID)
goto invalid;
if (d == BASE64_DECODE_WHITESPACE)
continue;
/* When padding starts, data is not acceptable */
if (hasPadding && d != BASE64_DECODE_PADDING)
goto invalid;
/* Padding after a full block (like "VVVV=") is ok and stops decoding */
if (d == BASE64_DECODE_PADDING && (cbValid & 3) == 0)
break;
cbValid += 1;
if (d == BASE64_DECODE_PADDING)
{
hasPadding = 1;
/* When padding reaches a full block, stop decoding */
if ((cbValid & 3) == 0)
break;
continue;
}
/* cbOut is incremented in the 4-char block as follows: "1-23" */
if ((cbValid & 3) != 2)
cbOut += 1;
}
/* Fail if the block has bad padding; omitting padding is fine */
if ((cbValid & 3) != 0 && hasPadding)
goto invalid;
/* Check available buffer size */
if (pbBinary && *pcbBinary && cbOut > *pcbBinary)
goto overflow;
/* Convert the data; this step depends on the validity checks above! */
if (pbBinary) for (cbIn = cbValid = cbOut = 0; cbIn < cchString; ++cbIn)
{
int c = wide ? (int)((WCHAR*)pszString)[cbIn] : (int)((char*)pszString)[cbIn];
int d = decodeBase64Byte(c);
if (d == BASE64_DECODE_WHITESPACE)
continue;
if (d == BASE64_DECODE_PADDING)
break;
block[cbValid & 3] = d;
cbValid += 1;
switch (cbValid & 3) {
case 1:
pbBinary[cbOut++] = (block[0] << 2);
break;
case 2:
pbBinary[cbOut-1] = (block[0] << 2) | (block[1] >> 4);
break;
case 3:
pbBinary[cbOut++] = (block[1] << 4) | (block[2] >> 2);
break;
case 0:
pbBinary[cbOut++] = (block[2] << 6) | (block[3] >> 0);
break;
}
}
*pcbBinary = cbOut;
if (pdwSkip)
*pdwSkip = 0;
if (pdwFlags)
*pdwFlags = CRYPT_STRING_BASE64;
return ERROR_SUCCESS;
overflow:
return ERROR_INSUFFICIENT_BUFFER;
invalid:
*pcbBinary = cbOut;
return ERROR_INVALID_DATA;
}
static LONG Base64ToBinaryA(LPCSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
return Base64ToBinary(pszString, FALSE, cchString, pbBinary, pcbBinary, pdwSkip, pdwFlags);
}
static LONG Base64WithHeaderAndTrailerToBinaryA(LPCSTR pszString,
DWORD cchString, BYTE *pbBinary,
DWORD *pcbBinary, DWORD *pdwSkip)
{
LONG ret;
LPCSTR header = CERT_HEADER_START;
LPCSTR trailer = CERT_TRAILER_START;
LPCSTR headerBegins;
LPCSTR dataBegins;
LPCSTR trailerBegins;
size_t dataLength;
if ((strlen(header) + strlen(trailer)) > cchString)
{
return ERROR_INVALID_DATA;
}
if (!(headerBegins = strstr(pszString, header)))
{
TRACE("Can't find %s in %s.\n", header, debugstr_an(pszString, cchString));
return ERROR_INVALID_DATA;
}
dataBegins = headerBegins + strlen(header);
if (!(dataBegins = strstr(dataBegins, CERT_DELIMITER)))
{
return ERROR_INVALID_DATA;
}
dataBegins += strlen(CERT_DELIMITER);
if (*dataBegins == '\r') dataBegins++;
if (*dataBegins == '\n') dataBegins++;
if (!(trailerBegins = strstr(dataBegins, trailer)))
{
return ERROR_INVALID_DATA;
}
if (*(trailerBegins-1) == '\n') trailerBegins--;
if (*(trailerBegins-1) == '\r') trailerBegins--;
if (pdwSkip)
*pdwSkip = headerBegins - pszString;
dataLength = trailerBegins - dataBegins;
ret = Base64ToBinaryA(dataBegins, dataLength, pbBinary, pcbBinary, NULL,
NULL);
return ret;
}
static LONG Base64HeaderToBinaryA(LPCSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = Base64WithHeaderAndTrailerToBinaryA(pszString, cchString,
pbBinary, pcbBinary, pdwSkip);
if (!ret && pdwFlags)
*pdwFlags = CRYPT_STRING_BASE64HEADER;
return ret;
}
static LONG Base64RequestHeaderToBinaryA(LPCSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = Base64WithHeaderAndTrailerToBinaryA(pszString, cchString,
pbBinary, pcbBinary, pdwSkip);
if (!ret && pdwFlags)
*pdwFlags = CRYPT_STRING_BASE64REQUESTHEADER;
return ret;
}
static LONG Base64X509HeaderToBinaryA(LPCSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = Base64WithHeaderAndTrailerToBinaryA(pszString, cchString,
pbBinary, pcbBinary, pdwSkip);
if (!ret && pdwFlags)
*pdwFlags = CRYPT_STRING_BASE64X509CRLHEADER;
return ret;
}
static LONG Base64AnyToBinaryA(LPCSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret;
ret = Base64HeaderToBinaryA(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
if (ret == ERROR_INVALID_DATA)
ret = Base64ToBinaryA(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
return ret;
}
static LONG DecodeBinaryToBinaryA(LPCSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = ERROR_SUCCESS;
if (*pcbBinary < cchString)
{
if (!pbBinary)
*pcbBinary = cchString;
else
{
ret = ERROR_INSUFFICIENT_BUFFER;
*pcbBinary = cchString;
}
}
else
{
if (cchString)
memcpy(pbBinary, pszString, cchString);
*pcbBinary = cchString;
}
return ret;
}
static LONG DecodeAnyA(LPCSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret;
ret = Base64HeaderToBinaryA(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
if (ret == ERROR_INVALID_DATA)
ret = Base64ToBinaryA(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
if (ret == ERROR_INVALID_DATA)
ret = DecodeBinaryToBinaryA(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
return ret;
}
static BOOL is_hex_string_special_char(WCHAR c)
{
switch (c)
{
case '-':
case ',':
case ' ':
case '\t':
case '\r':
case '\n':
return TRUE;
default:
return FALSE;
}
}
static WCHAR wchar_from_str(BOOL wide, const void **str, DWORD *len)
{
WCHAR c;
if (!*len)
return 0;
--*len;
if (wide)
c = *(*(const WCHAR **)str)++;
else
c = *(*(const char **)str)++;
return c ? c : 0xffff;
}
static BYTE digit_from_char(WCHAR c)
{
if (c >= '0' && c <= '9')
return c - '0';
c = towlower(c);
if (c >= 'a' && c <= 'f')
return c - 'a' + 0xa;
return 0xff;
}
static LONG string_to_hex(const void* str, BOOL wide, DWORD len, BYTE *hex, DWORD *hex_len,
DWORD *skipped, DWORD *ret_flags)
{
unsigned int byte_idx = 0;
BYTE d1, d2;
WCHAR c;
if (!str || !hex_len)
return ERROR_INVALID_PARAMETER;
if (!len)
len = wide ? wcslen(str) : strlen(str);
if (wide && !len)
return ERROR_INVALID_PARAMETER;
if (skipped)
*skipped = 0;
if (ret_flags)
*ret_flags = 0;
while ((c = wchar_from_str(wide, &str, &len)) && is_hex_string_special_char(c))
;
while ((d1 = digit_from_char(c)) != 0xff)
{
if ((d2 = digit_from_char(wchar_from_str(wide, &str, &len))) == 0xff)
{
if (!hex)
*hex_len = 0;
return ERROR_INVALID_DATA;
}
if (hex && byte_idx < *hex_len)
hex[byte_idx] = (d1 << 4) | d2;
++byte_idx;
do
{
c = wchar_from_str(wide, &str, &len);
} while (c == '-' || c == ',');
}
while (c)
{
if (!is_hex_string_special_char(c))
{
if (!hex)
*hex_len = 0;
return ERROR_INVALID_DATA;
}
c = wchar_from_str(wide, &str, &len);
}
if (hex && byte_idx > *hex_len)
return ERROR_MORE_DATA;
if (ret_flags)
*ret_flags = CRYPT_STRING_HEX;
*hex_len = byte_idx;
return ERROR_SUCCESS;
}
static LONG string_to_hexA(const char *str, DWORD len, BYTE *hex, DWORD *hex_len, DWORD *skipped, DWORD *ret_flags)
{
return string_to_hex(str, FALSE, len, hex, hex_len, skipped, ret_flags);
}
BOOL WINAPI CryptStringToBinaryA(LPCSTR pszString,
DWORD cchString, DWORD dwFlags, BYTE *pbBinary, DWORD *pcbBinary,
DWORD *pdwSkip, DWORD *pdwFlags)
{
StringToBinaryAFunc decoder;
LONG ret;
TRACE("(%s, %ld, %08lx, %p, %p, %p, %p)\n", debugstr_an(pszString, cchString ? cchString : -1),
cchString, dwFlags, pbBinary, pcbBinary, pdwSkip, pdwFlags);
if (!pszString)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
/* Only the bottom byte contains valid types */
if (dwFlags & 0xfffffff0)
{
SetLastError(ERROR_INVALID_DATA);
return FALSE;
}
switch (dwFlags)
{
case CRYPT_STRING_BASE64_ANY:
decoder = Base64AnyToBinaryA;
break;
case CRYPT_STRING_BASE64:
decoder = Base64ToBinaryA;
break;
case CRYPT_STRING_BASE64HEADER:
decoder = Base64HeaderToBinaryA;
break;
case CRYPT_STRING_BASE64REQUESTHEADER:
decoder = Base64RequestHeaderToBinaryA;
break;
case CRYPT_STRING_BASE64X509CRLHEADER:
decoder = Base64X509HeaderToBinaryA;
break;
case CRYPT_STRING_BINARY:
decoder = DecodeBinaryToBinaryA;
break;
case CRYPT_STRING_ANY:
decoder = DecodeAnyA;
break;
case CRYPT_STRING_HEX:
decoder = string_to_hexA;
break;
case CRYPT_STRING_HEXASCII:
case CRYPT_STRING_HEXADDR:
case CRYPT_STRING_HEXASCIIADDR:
FIXME("Unimplemented type %ld\n", dwFlags & 0x7fffffff);
/* fall through */
default:
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
if (!cchString)
cchString = strlen(pszString);
ret = decoder(pszString, cchString, pbBinary, pcbBinary, pdwSkip, pdwFlags);
if (ret)
SetLastError(ret);
return ret == ERROR_SUCCESS;
}
/* Unlike CryptStringToBinaryW, cchString is guaranteed to be the length of the
* string to convert.
*/
typedef LONG (*StringToBinaryWFunc)(LPCWSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags);
static LONG Base64ToBinaryW(LPCWSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
return Base64ToBinary(pszString, TRUE, cchString, pbBinary, pcbBinary, pdwSkip, pdwFlags);
}
static LONG Base64WithHeaderAndTrailerToBinaryW(LPCWSTR pszString,
DWORD cchString, BYTE *pbBinary,
DWORD *pcbBinary, DWORD *pdwSkip)
{
LONG ret;
LPCWSTR header = CERT_HEADER_START_W;
LPCWSTR trailer = CERT_TRAILER_START_W;
LPCWSTR headerBegins;
LPCWSTR dataBegins;
LPCWSTR trailerBegins;
size_t dataLength;
if ((lstrlenW(header) + lstrlenW(trailer)) > cchString)
{
return ERROR_INVALID_DATA;
}
if (!(headerBegins = wcsstr(pszString, header)))
{
TRACE("Can't find %s in %s.\n", debugstr_w(header), debugstr_wn(pszString, cchString));
return ERROR_INVALID_DATA;
}
dataBegins = headerBegins + lstrlenW(header);
if (!(dataBegins = wcsstr(dataBegins, CERT_DELIMITER_W)))
{
return ERROR_INVALID_DATA;
}
dataBegins += lstrlenW(CERT_DELIMITER_W);
if (*dataBegins == '\r') dataBegins++;
if (*dataBegins == '\n') dataBegins++;
if (!(trailerBegins = wcsstr(dataBegins, trailer)))
{
return ERROR_INVALID_DATA;
}
if (*(trailerBegins-1) == '\n') trailerBegins--;
if (*(trailerBegins-1) == '\r') trailerBegins--;
if (pdwSkip)
*pdwSkip = headerBegins - pszString;
dataLength = trailerBegins - dataBegins;
ret = Base64ToBinaryW(dataBegins, dataLength, pbBinary, pcbBinary, NULL,
NULL);
return ret;
}
static LONG Base64HeaderToBinaryW(LPCWSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = Base64WithHeaderAndTrailerToBinaryW(pszString, cchString,
pbBinary, pcbBinary, pdwSkip);
if (!ret && pdwFlags)
*pdwFlags = CRYPT_STRING_BASE64HEADER;
return ret;
}
static LONG Base64RequestHeaderToBinaryW(LPCWSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = Base64WithHeaderAndTrailerToBinaryW(pszString, cchString,
pbBinary, pcbBinary, pdwSkip);
if (!ret && pdwFlags)
*pdwFlags = CRYPT_STRING_BASE64REQUESTHEADER;
return ret;
}
static LONG Base64X509HeaderToBinaryW(LPCWSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = Base64WithHeaderAndTrailerToBinaryW(pszString, cchString,
pbBinary, pcbBinary, pdwSkip);
if (!ret && pdwFlags)
*pdwFlags = CRYPT_STRING_BASE64X509CRLHEADER;
return ret;
}
static LONG Base64AnyToBinaryW(LPCWSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret;
ret = Base64HeaderToBinaryW(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
if (ret == ERROR_INVALID_DATA)
ret = Base64ToBinaryW(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
return ret;
}
static LONG DecodeBinaryToBinaryW(LPCWSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = ERROR_SUCCESS;
if (*pcbBinary < cchString)
{
if (!pbBinary)
*pcbBinary = cchString;
else
{
ret = ERROR_INSUFFICIENT_BUFFER;
*pcbBinary = cchString;
}
}
else
{
if (cchString)
memcpy(pbBinary, pszString, cchString * sizeof(WCHAR));
*pcbBinary = cchString * sizeof(WCHAR);
}
return ret;
}
static LONG DecodeAnyW(LPCWSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret;
ret = Base64HeaderToBinaryW(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
if (ret == ERROR_INVALID_DATA)
ret = Base64ToBinaryW(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
if (ret == ERROR_INVALID_DATA)
ret = DecodeBinaryToBinaryW(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
return ret;
}
static LONG string_to_hexW(const WCHAR *str, DWORD len, BYTE *hex, DWORD *hex_len, DWORD *skipped, DWORD *ret_flags)
{
return string_to_hex(str, TRUE, len, hex, hex_len, skipped, ret_flags);
}
BOOL WINAPI CryptStringToBinaryW(LPCWSTR pszString,
DWORD cchString, DWORD dwFlags, BYTE *pbBinary, DWORD *pcbBinary,
DWORD *pdwSkip, DWORD *pdwFlags)
{
StringToBinaryWFunc decoder;
LONG ret;
TRACE("(%s, %ld, %08lx, %p, %p, %p, %p)\n", debugstr_wn(pszString, cchString ? cchString : -1),
cchString, dwFlags, pbBinary, pcbBinary, pdwSkip, pdwFlags);
if (!pszString)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
/* Only the bottom byte contains valid types */
if (dwFlags & 0xfffffff0)
{
SetLastError(ERROR_INVALID_DATA);
return FALSE;
}
switch (dwFlags)
{
case CRYPT_STRING_BASE64_ANY:
decoder = Base64AnyToBinaryW;
break;
case CRYPT_STRING_BASE64:
decoder = Base64ToBinaryW;
break;
case CRYPT_STRING_BASE64HEADER:
decoder = Base64HeaderToBinaryW;
break;
case CRYPT_STRING_BASE64REQUESTHEADER:
decoder = Base64RequestHeaderToBinaryW;
break;
case CRYPT_STRING_BASE64X509CRLHEADER:
decoder = Base64X509HeaderToBinaryW;
break;
case CRYPT_STRING_BINARY:
decoder = DecodeBinaryToBinaryW;
break;
case CRYPT_STRING_ANY:
decoder = DecodeAnyW;
break;
case CRYPT_STRING_HEX:
decoder = string_to_hexW;
break;
case CRYPT_STRING_HEXASCII:
case CRYPT_STRING_HEXADDR:
case CRYPT_STRING_HEXASCIIADDR:
FIXME("Unimplemented type %ld\n", dwFlags & 0x7fffffff);
/* fall through */
default:
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
if (!cchString)
cchString = lstrlenW(pszString);
ret = decoder(pszString, cchString, pbBinary, pcbBinary, pdwSkip, pdwFlags);
if (ret)
SetLastError(ret);
return ret == ERROR_SUCCESS;
}
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