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wintrust: Implement WVTAsn1CatMemberInfoDecode.

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This commit is contained in:
Juan Lang 2008-10-17 14:32:59 -07:00 committed by Alexandre Julliard
parent 6b13b35640
commit c80b99a2f4
2 changed files with 152 additions and 5 deletions
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154
dlls/wintrust/asn.c
View File

@ -1903,11 +1903,161 @@ BOOL WINAPI WVTAsn1SpcSpOpusInfoDecode(DWORD dwCertEncodingType,
return FALSE;
}
static BOOL WINAPI CRYPT_AsnDecodeBMPString(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
DWORD bytesNeeded, dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
bytesNeeded = dataLen + 2 + sizeof(LPWSTR);
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
LPWSTR str;
DWORD i;
*pcbStructInfo = bytesNeeded;
assert(pvStructInfo);
str = *(LPWSTR *)pvStructInfo;
for (i = 0; i < dataLen / 2; i++)
str[i] = (pbEncoded[1 + lenBytes + 2 * i] << 8) |
pbEncoded[1 + lenBytes + 2 * i + 1];
/* Decoded string is always NULL-terminated */
str[i] = '\0';
}
}
return ret;
}
static BOOL CRYPT_AsnDecodeInteger(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo)
{
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 (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
CRYPT_INTEGER_BLOB *blob = (CRYPT_INTEGER_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;
}
/* Ignores tag. Only allows integers 4 bytes or smaller in size. */
static BOOL WINAPI CRYPT_AsnDecodeInt(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
BYTE buf[sizeof(CRYPT_INTEGER_BLOB) + sizeof(int)];
CRYPT_INTEGER_BLOB *blob = (CRYPT_INTEGER_BLOB *)buf;
DWORD size = sizeof(buf);
blob->pbData = buf + sizeof(CRYPT_INTEGER_BLOB);
ret = CRYPT_AsnDecodeInteger(pbEncoded, cbEncoded, 0, buf, &size);
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = sizeof(int);
else if (*pcbStructInfo < sizeof(int))
{
*pcbStructInfo = sizeof(int);
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
int val, i;
*pcbStructInfo = sizeof(int);
if (blob->pbData[blob->cbData - 1] & 0x80)
{
/* initialize to a negative value to sign-extend */
val = -1;
}
else
val = 0;
for (i = 0; i < blob->cbData; i++)
{
val <<= 8;
val |= blob->pbData[blob->cbData - i - 1];
}
memcpy(pvStructInfo, &val, sizeof(int));
}
}
else if (GetLastError() == ERROR_MORE_DATA)
SetLastError(CRYPT_E_ASN1_LARGE);
return ret;
}
BOOL WINAPI WVTAsn1CatMemberInfoDecode(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
void *pvStructInfo, DWORD *pcbStructInfo)
{
FIXME("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
BOOL ret = FALSE;
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
return FALSE;
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_BMPSTRING, offsetof(CAT_MEMBERINFO, pwszSubjGuid),
CRYPT_AsnDecodeBMPString, sizeof(LPWSTR), FALSE, TRUE,
offsetof(CAT_MEMBERINFO, pwszSubjGuid), 0 },
{ ASN_INTEGER, offsetof(CAT_MEMBERINFO, dwCertVersion),
CRYPT_AsnDecodeInt, sizeof(DWORD),
FALSE, FALSE, 0, 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;
}

3
dlls/wintrust/tests/asn.c
View File

@ -547,7 +547,6 @@ static void test_decodeCatMemberInfo(void)
ret = pCryptDecodeObjectEx(X509_ASN_ENCODING, CAT_MEMBERINFO_STRUCT,
emptyCatMemberInfo, sizeof(emptyCatMemberInfo),
CRYPT_DECODE_ALLOC_FLAG, NULL, (BYTE *)&buf, &size);
todo_wine
ok(ret, "CryptDecodeObjectEx failed: %08x\n", GetLastError());
if (ret)
{
@ -561,7 +560,6 @@ static void test_decodeCatMemberInfo(void)
ret = pCryptDecodeObjectEx(X509_ASN_ENCODING, CAT_MEMBERINFO_STRUCT,
catMemberInfoWithSillyGuid, sizeof(catMemberInfoWithSillyGuid),
CRYPT_DECODE_ALLOC_FLAG, NULL, (BYTE *)&buf, &size);
todo_wine
ok(ret, "CryptDecodeObjectEx failed: %08x\n", GetLastError());
if (ret)
{
@ -575,7 +573,6 @@ static void test_decodeCatMemberInfo(void)
ret = pCryptDecodeObjectEx(X509_ASN_ENCODING, CAT_MEMBERINFO_STRUCT,
catMemberInfoWithGuid, sizeof(catMemberInfoWithGuid),
CRYPT_DECODE_ALLOC_FLAG, NULL, (BYTE *)&buf, &size);
todo_wine
ok(ret, "CryptDecodeObjectEx failed: %08x\n", GetLastError());
if (ret)
{