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crypt32: Explicitly pass array pointer when decoding PKCS attribute values rather than assuming a particular alignment.

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This commit is contained in:
Juan Lang 2009-10-14 12:47:27 -07:00 committed by Alexandre Julliard
parent b8f696ff62
commit 65296a476d
1 changed files with 34 additions and 2 deletions
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36
dlls/crypt32/decode.c
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@ -2884,6 +2884,37 @@ static BOOL WINAPI CRYPT_AsnDecodePolicyQualifierUserNotice(
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, CRYPT_AsnDecodeCopyBytes,
sizeof(CRYPT_DER_BLOB), TRUE, offsetof(CRYPT_DER_BLOB, pbData) };
DWORD bytesNeeded;
TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pvStructInfo ? *pcbStructInfo : 0, pcbDecoded);
if ((ret = CRYPT_AsnDecodeArrayNoAlloc(&arrayDesc, pbEncoded, cbEncoded,
NULL, NULL, &bytesNeeded, pcbDecoded)))
{
bytesNeeded += FINALMEMBERSIZE(CRYPT_ATTRIBUTE, cValue);
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(0, NULL, pvStructInfo,
pcbStructInfo, bytesNeeded)))
{
CRYPT_ATTRIBUTE *attr = (CRYPT_ATTRIBUTE *)((BYTE *)pvStructInfo -
offsetof(CRYPT_ATTRIBUTE, cValue));
ret = CRYPT_AsnDecodeArrayNoAlloc(&arrayDesc, pbEncoded, cbEncoded,
&attr->cValue, attr->rgValue, pcbStructInfo, pcbDecoded);
}
}
return ret;
}
static BOOL CRYPT_AsnDecodePKCSAttributeInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
@ -2894,8 +2925,9 @@ static BOOL CRYPT_AsnDecodePKCSAttributeInternal(const BYTE *pbEncoded,
CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
offsetof(CRYPT_ATTRIBUTE, pszObjId), 0 },
{ ASN_CONSTRUCTOR | ASN_SETOF, offsetof(CRYPT_ATTRIBUTE, cValue),
CRYPT_DecodeDERArray, sizeof(struct GenericArray), FALSE, TRUE,
offsetof(CRYPT_ATTRIBUTE, rgValue), 0 },
CRYPT_AsnDecodePKCSAttributeValue,
FINALMEMBERSIZE(CRYPT_ATTRIBUTE, cValue), FALSE,
TRUE, offsetof(CRYPT_ATTRIBUTE, rgValue), 0 },
};
PCRYPT_ATTRIBUTE attr = pvStructInfo;