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wintrust: Implement SPC PE image encoding.

This commit is contained in:
Juan Lang 2007-08-13 14:35:13 -07:00 committed by Alexandre Julliard
parent 998bea1043
commit 5d965df220
2 changed files with 227 additions and 10 deletions
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230
dlls/wintrust/asn.c
View File

@ -143,7 +143,8 @@ BOOL WINAPI WVTAsn1SpcLinkEncode(DWORD dwCertEncodingType,
DWORD fileNameLen, fileNameLenBytes;
LPWSTR ptr;
fileNameLen = lstrlenW(link->u.pwszFile) * sizeof(WCHAR);
fileNameLen = link->u.pwszFile ?
lstrlenW(link->u.pwszFile) * sizeof(WCHAR) : 0;
CRYPT_EncodeLen(fileNameLen, NULL, &fileNameLenBytes);
CRYPT_EncodeLen(1 + fileNameLenBytes + fileNameLen, NULL,
&lenBytes);
@ -274,14 +275,237 @@ BOOL WINAPI WVTAsn1SpcLinkEncode(DWORD dwCertEncodingType,
return ret;
}
typedef BOOL (WINAPI *CryptEncodeObjectFunc)(DWORD, LPCSTR, const void *,
BYTE *, DWORD *);
struct AsnEncodeSequenceItem
{
const void *pvStructInfo;
CryptEncodeObjectFunc encodeFunc;
DWORD size; /* used during encoding, not for your use */
};
static BOOL WINAPI CRYPT_AsnEncodeSequence(DWORD dwCertEncodingType,
struct AsnEncodeSequenceItem items[], DWORD cItem, BYTE *pbEncoded,
DWORD *pcbEncoded)
{
BOOL ret;
DWORD i, dataLen = 0;
TRACE("%p, %d, %p, %d\n", items, cItem, pbEncoded, *pcbEncoded);
for (i = 0, ret = TRUE; ret && i < cItem; i++)
{
ret = items[i].encodeFunc(dwCertEncodingType, NULL,
items[i].pvStructInfo, NULL, &items[i].size);
/* Some functions propagate their errors through the size */
if (!ret)
*pcbEncoded = items[i].size;
dataLen += items[i].size;
}
if (ret)
{
DWORD lenBytes, bytesNeeded;
CRYPT_EncodeLen(dataLen, NULL, &lenBytes);
bytesNeeded = 1 + lenBytes + dataLen;
if (!pbEncoded)
*pcbEncoded = bytesNeeded;
else if (*pcbEncoded < bytesNeeded)
{
*pcbEncoded = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pcbEncoded = bytesNeeded;
*pbEncoded++ = ASN_SEQUENCE;
CRYPT_EncodeLen(dataLen, pbEncoded, &lenBytes);
pbEncoded += lenBytes;
for (i = 0; ret && i < cItem; i++)
{
ret = items[i].encodeFunc(dwCertEncodingType, NULL,
items[i].pvStructInfo, pbEncoded, &items[i].size);
/* Some functions propagate their errors through the size */
if (!ret)
*pcbEncoded = items[i].size;
pbEncoded += items[i].size;
}
}
}
TRACE("returning %d\n", ret);
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeBits(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
DWORD *pcbEncoded)
{
BOOL ret = FALSE;
__TRY
{
const CRYPT_BIT_BLOB *blob = (const CRYPT_BIT_BLOB *)pvStructInfo;
DWORD bytesNeeded, lenBytes, dataBytes;
BYTE unusedBits;
/* yep, MS allows cUnusedBits to be >= 8 */
if (!blob->cUnusedBits)
{
dataBytes = blob->cbData;
unusedBits = 0;
}
else if (blob->cbData * 8 > blob->cUnusedBits)
{
dataBytes = (blob->cbData * 8 - blob->cUnusedBits) / 8 + 1;
unusedBits = blob->cUnusedBits >= 8 ? blob->cUnusedBits / 8 :
blob->cUnusedBits;
}
else
{
dataBytes = 0;
unusedBits = 0;
}
CRYPT_EncodeLen(dataBytes + 1, NULL, &lenBytes);
bytesNeeded = 1 + lenBytes + dataBytes + 1;
if (!pbEncoded)
{
*pcbEncoded = bytesNeeded;
ret = TRUE;
}
else if (*pcbEncoded < bytesNeeded)
{
*pcbEncoded = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
}
else
{
ret = TRUE;
*pcbEncoded = bytesNeeded;
*pbEncoded++ = ASN_BITSTRING;
CRYPT_EncodeLen(dataBytes + 1, pbEncoded, &lenBytes);
pbEncoded += lenBytes;
*pbEncoded++ = unusedBits;
if (dataBytes)
{
BYTE mask = 0xff << unusedBits;
if (dataBytes > 1)
{
memcpy(pbEncoded, blob->pbData, dataBytes - 1);
pbEncoded += dataBytes - 1;
}
*pbEncoded = *(blob->pbData + dataBytes - 1) & mask;
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
return ret;
}
struct AsnConstructedItem
{
BYTE tag;
const void *pvStructInfo;
CryptEncodeObjectFunc encodeFunc;
};
static BOOL WINAPI CRYPT_AsnEncodeConstructed(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
DWORD *pcbEncoded)
{
BOOL ret;
const struct AsnConstructedItem *item =
(const struct AsnConstructedItem *)pvStructInfo;
DWORD len;
if ((ret = item->encodeFunc(dwCertEncodingType, lpszStructType,
item->pvStructInfo, NULL, &len)))
{
DWORD dataLen, bytesNeeded;
CRYPT_EncodeLen(len, NULL, &dataLen);
bytesNeeded = 1 + dataLen + len;
if (!pbEncoded)
*pcbEncoded = bytesNeeded;
else if (*pcbEncoded < bytesNeeded)
{
*pcbEncoded = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pcbEncoded = bytesNeeded;
*pbEncoded++ = ASN_CONTEXT | ASN_CONSTRUCTOR | item->tag;
CRYPT_EncodeLen(len, pbEncoded, &dataLen);
pbEncoded += dataLen;
ret = item->encodeFunc(dwCertEncodingType, lpszStructType,
item->pvStructInfo, pbEncoded, &len);
if (!ret)
{
/* Some functions propagate their errors through the size */
*pcbEncoded = len;
}
}
}
else
{
/* Some functions propagate their errors through the size */
*pcbEncoded = len;
}
return ret;
}
BOOL WINAPI WVTAsn1SpcPeImageDataEncode(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
DWORD *pcbEncoded)
{
FIXME("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
const SPC_PE_IMAGE_DATA *imageData =
(const SPC_PE_IMAGE_DATA *)pvStructInfo;
BOOL ret = FALSE;
TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
debugstr_a(lpszStructType), pvStructInfo, pbEncoded,
pcbEncoded);
return FALSE;
__TRY
{
struct AsnEncodeSequenceItem items[2] = {
{ 0 }
};
struct AsnConstructedItem constructed = { 0, imageData->pFile,
WVTAsn1SpcLinkEncode };
DWORD cItem = 0;
if (imageData->Flags.cbData)
{
items[cItem].pvStructInfo = &imageData->Flags;
items[cItem].encodeFunc = CRYPT_AsnEncodeBits;
cItem++;
}
if (imageData->pFile)
{
items[cItem].pvStructInfo = &constructed;
items[cItem].encodeFunc = CRYPT_AsnEncodeConstructed;
cItem++;
}
ret = CRYPT_AsnEncodeSequence(dwCertEncodingType, items, cItem,
pbEncoded, pcbEncoded);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("returning %d\n", ret);
return ret;
}
/* Gets the number of length bytes from the given (leading) length byte */

7
dlls/wintrust/tests/asn.c
View File

@ -240,7 +240,6 @@ static void test_encodeSPCPEImage(void)
ret = CryptEncodeObjectEx(X509_ASN_ENCODING, SPC_PE_IMAGE_DATA_STRUCT,
&imageData, CRYPT_ENCODE_ALLOC_FLAG, NULL, &buf, &size);
todo_wine
ok(ret, "CryptEncodeObjectEx failed: %08x\n", GetLastError());
if (ret)
{
@ -254,7 +253,6 @@ static void test_encodeSPCPEImage(void)
SetLastError(0xdeadbeef);
ret = CryptEncodeObjectEx(X509_ASN_ENCODING, SPC_PE_IMAGE_DATA_STRUCT,
&imageData, CRYPT_ENCODE_ALLOC_FLAG, NULL, &buf, &size);
todo_wine
ok(!ret && GetLastError () == E_INVALIDARG,
"Expected E_INVALIDARG, got %08x\n", GetLastError());
/* With just unused bits field set: */
@ -262,7 +260,6 @@ static void test_encodeSPCPEImage(void)
imageData.Flags.cUnusedBits = 1;
ret = CryptEncodeObjectEx(X509_ASN_ENCODING, SPC_PE_IMAGE_DATA_STRUCT,
&imageData, CRYPT_ENCODE_ALLOC_FLAG, NULL, &buf, &size);
todo_wine
ok(ret, "CryptEncodeObjectEx failed: %08x\n", GetLastError());
if (ret)
{
@ -277,7 +274,6 @@ static void test_encodeSPCPEImage(void)
imageData.Flags.cbData = sizeof(flags);
ret = CryptEncodeObjectEx(X509_ASN_ENCODING, SPC_PE_IMAGE_DATA_STRUCT,
&imageData, CRYPT_ENCODE_ALLOC_FLAG, NULL, &buf, &size);
todo_wine
ok(ret, "CryptEncodeObjectEx failed: %08x\n", GetLastError());
if (ret)
{
@ -292,7 +288,6 @@ static void test_encodeSPCPEImage(void)
imageData.pFile = &link;
ret = CryptEncodeObjectEx(X509_ASN_ENCODING, SPC_PE_IMAGE_DATA_STRUCT,
&imageData, CRYPT_ENCODE_ALLOC_FLAG, NULL, &buf, &size);
todo_wine
ok(ret, "CryptEncodeObjectEx failed: %08x\n", GetLastError());
if (ret)
{
@ -306,7 +301,6 @@ static void test_encodeSPCPEImage(void)
imageData.Flags.cbData = sizeof(flags);
ret = CryptEncodeObjectEx(X509_ASN_ENCODING, SPC_PE_IMAGE_DATA_STRUCT,
&imageData, CRYPT_ENCODE_ALLOC_FLAG, NULL, &buf, &size);
todo_wine
ok(ret, "CryptEncodeObjectEx failed: %08x\n", GetLastError());
if (ret)
{
@ -320,7 +314,6 @@ static void test_encodeSPCPEImage(void)
link.pwszFile = (LPWSTR)nihongoURL;
ret = CryptEncodeObjectEx(X509_ASN_ENCODING, SPC_PE_IMAGE_DATA_STRUCT,
&imageData, CRYPT_ENCODE_ALLOC_FLAG, NULL, &buf, &size);
todo_wine
ok(ret, "CryptEncodeObjectEx failed: %08x\n", GetLastError());
if (ret)
{