ReceiveTempSMS
/
Sweden-Number
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

wintrust: Implement SPC indirect data decoding.

This commit is contained in:
Juan Lang 2007-08-13 14:36:08 -07:00 committed by Alexandre Julliard
parent f7e62befe8
commit 261f02ca68
2 changed files with 274 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

273
dlls/wintrust/asn.c
View File

@ -1447,3 +1447,276 @@ BOOL WINAPI WVTAsn1SpcPeImageDataDecode(DWORD dwCertEncodingType,
TRACE("returning %d\n", ret);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeOidIgnoreTag(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
DWORD dataLen;
TRACE("%p, %d, %08x, %p, %d\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)
{
/* The largest possible string for the first two components
* is 2.175 (= 2 * 40 + 175 = 255), so this is big enough.
*/
char firstTwo[6];
const BYTE *ptr;
snprintf(firstTwo, sizeof(firstTwo), "%d.%d",
pbEncoded[1 + lenBytes] / 40,
pbEncoded[1 + lenBytes] - (pbEncoded[1 + lenBytes] / 40)
* 40);
bytesNeeded += strlen(firstTwo) + 1;
for (ptr = pbEncoded + 2 + lenBytes; ret &&
ptr - pbEncoded - 1 - lenBytes < dataLen; )
{
/* large enough for ".4000000" */
char str[9];
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 (!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 WINAPI CRYPT_AsnDecodeOid(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
if (!cbEncoded)
SetLastError(CRYPT_E_ASN1_CORRUPT);
else if (pbEncoded[0] == ASN_OBJECTIDENTIFIER)
ret = CRYPT_AsnDecodeOidIgnoreTag(dwCertEncodingType, lpszStructType,
pbEncoded, cbEncoded, dwFlags, pvStructInfo, pcbStructInfo);
else
SetLastError(CRYPT_E_ASN1_BADTAG);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCopyBytes(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
DWORD bytesNeeded = sizeof(CRYPT_OBJID_BLOB);
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += cbEncoded;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
*pcbStructInfo = bytesNeeded;
ret = FALSE;
}
else
{
PCRYPT_OBJID_BLOB blob = (PCRYPT_OBJID_BLOB)pvStructInfo;
*pcbStructInfo = bytesNeeded;
blob->cbData = cbEncoded;
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
blob->pbData = (LPBYTE)pbEncoded;
else
{
assert(blob->pbData);
memcpy(blob->pbData, pbEncoded, blob->cbData);
}
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeAttributeTypeValue(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
void *pvStructInfo, DWORD *pcbStructInfo)
{
CRYPT_ATTRIBUTE_TYPE_VALUE *typeValue =
(CRYPT_ATTRIBUTE_TYPE_VALUE *)pvStructInfo;
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CRYPT_ATTRIBUTE_TYPE_VALUE, pszObjId),
CRYPT_AsnDecodeOid, sizeof(LPSTR), FALSE, TRUE,
offsetof(CRYPT_ATTRIBUTE_TYPE_VALUE, pszObjId), 0 },
{ 0, offsetof(CRYPT_ATTRIBUTE_TYPE_VALUE, Value),
CRYPT_AsnDecodeCopyBytes, sizeof(CRYPT_DATA_BLOB), TRUE, TRUE,
offsetof(CRYPT_ATTRIBUTE_TYPE_VALUE, Value.pbData), 0 },
};
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
return CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pcbStructInfo,
typeValue ? typeValue->pszObjId : NULL);
}
static BOOL WINAPI CRYPT_AsnDecodeAlgorithmId(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
void *pvStructInfo, DWORD *pcbStructInfo)
{
CRYPT_ALGORITHM_IDENTIFIER *algo =
(CRYPT_ALGORITHM_IDENTIFIER *)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, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pcbStructInfo, algo ? algo->pszObjId : NULL);
if (ret && pvStructInfo)
{
TRACE("pszObjId is %p (%s)\n", algo->pszObjId,
debugstr_a(algo->pszObjId));
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeSPCDigest(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
void *pvStructInfo, DWORD *pcbStructInfo)
{
struct SPCDigest *digest =
(struct SPCDigest *)pvStructInfo;
struct AsnDecodeSequenceItem items[] = {
{ ASN_SEQUENCEOF, offsetof(struct SPCDigest, DigestAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE,
offsetof(struct SPCDigest, DigestAlgorithm.pszObjId), 0 },
{ ASN_OCTETSTRING, offsetof(struct SPCDigest, Digest),
CRYPT_AsnDecodeOctets, sizeof(CRYPT_DER_BLOB),
FALSE, TRUE, offsetof(struct SPCDigest, Digest.pbData), 0 },
};
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
return CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pcbStructInfo,
digest ? digest->DigestAlgorithm.pszObjId : NULL);
}
BOOL WINAPI WVTAsn1SpcIndirectDataContentDecode(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_SEQUENCEOF, offsetof(SPC_INDIRECT_DATA_CONTENT, Data),
CRYPT_AsnDecodeAttributeTypeValue,
sizeof(CRYPT_ATTRIBUTE_TYPE_VALUE), FALSE, TRUE,
offsetof(SPC_INDIRECT_DATA_CONTENT, Data.pszObjId), 0 },
{ ASN_SEQUENCEOF, offsetof(SPC_INDIRECT_DATA_CONTENT, DigestAlgorithm),
CRYPT_AsnDecodeSPCDigest, sizeof(struct SPCDigest),
FALSE, TRUE,
offsetof(SPC_INDIRECT_DATA_CONTENT, DigestAlgorithm.pszObjId), 0 },
};
ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pcbStructInfo, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("returning %d\n", ret);
return ret;
}

2
dlls/wintrust/wintrust.spec
View File

@ -92,7 +92,7 @@
@ stub WVTAsn1CatNameValueEncode
@ stub WVTAsn1SpcFinancialCriteriaInfoDecode
@ stub WVTAsn1SpcFinancialCriteriaInfoEncode
@ stub WVTAsn1SpcIndirectDataContentDecode
@ stdcall WVTAsn1SpcIndirectDataContentDecode(long str ptr long long ptr ptr)
@ stdcall WVTAsn1SpcIndirectDataContentEncode(long str ptr ptr ptr)
@ stdcall WVTAsn1SpcLinkDecode(long str ptr long long ptr ptr)
@ stdcall WVTAsn1SpcLinkEncode(long str ptr ptr ptr)