1732 lines
56 KiB
C
1732 lines
56 KiB
C
/* wintrust asn functions
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*
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* Copyright 2007 Juan Lang
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*
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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include <assert.h>
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#define NONAMELESSUNION
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#include "windef.h"
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#include "winbase.h"
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#include "winerror.h"
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#include "wincrypt.h"
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#include "wintrust.h"
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#include "snmp.h"
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#include "winternl.h"
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#include "wine/debug.h"
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#include "wine/exception.h"
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WINE_DEFAULT_DEBUG_CHANNEL(cryptasn);
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#ifdef WORDS_BIGENDIAN
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#define hton16(x) (x)
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#define n16toh(x) (x)
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#else
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#define hton16(x) RtlUshortByteSwap(x)
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#define n16toh(x) RtlUshortByteSwap(x)
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#endif
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#define ASN_BITSTRING (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x03)
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static BOOL CRYPT_EncodeLen(DWORD len, BYTE *pbEncoded, DWORD *pcbEncoded)
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{
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DWORD bytesNeeded, significantBytes = 0;
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if (len <= 0x7f)
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bytesNeeded = 1;
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else
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{
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DWORD temp;
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for (temp = len, significantBytes = sizeof(temp); !(temp & 0xff000000);
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temp <<= 8, significantBytes--)
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;
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bytesNeeded = significantBytes + 1;
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}
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if (!pbEncoded)
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{
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*pcbEncoded = bytesNeeded;
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return TRUE;
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}
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if (*pcbEncoded < bytesNeeded)
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{
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SetLastError(ERROR_MORE_DATA);
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return FALSE;
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}
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if (len <= 0x7f)
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*pbEncoded = (BYTE)len;
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else
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{
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DWORD i;
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*pbEncoded++ = significantBytes | 0x80;
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for (i = 0; i < significantBytes; i++)
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{
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*(pbEncoded + significantBytes - i - 1) = (BYTE)(len & 0xff);
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len >>= 8;
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}
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}
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*pcbEncoded = bytesNeeded;
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return TRUE;
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}
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static BOOL WINAPI CRYPT_AsnEncodeOctets(DWORD dwCertEncodingType,
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LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
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DWORD *pcbEncoded)
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{
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BOOL ret = TRUE;
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const CRYPT_DATA_BLOB *blob = (const CRYPT_DATA_BLOB *)pvStructInfo;
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DWORD bytesNeeded, lenBytes;
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TRACE("(%d, %p), %p, %d\n", blob->cbData, blob->pbData, pbEncoded,
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*pcbEncoded);
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CRYPT_EncodeLen(blob->cbData, NULL, &lenBytes);
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bytesNeeded = 1 + lenBytes + blob->cbData;
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if (!pbEncoded)
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*pcbEncoded = bytesNeeded;
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else if (*pcbEncoded < bytesNeeded)
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{
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*pcbEncoded = bytesNeeded;
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SetLastError(ERROR_MORE_DATA);
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ret = FALSE;
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}
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else
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{
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*pbEncoded++ = ASN_OCTETSTRING;
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CRYPT_EncodeLen(blob->cbData, pbEncoded, &lenBytes);
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pbEncoded += lenBytes;
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if (blob->cbData)
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memcpy(pbEncoded, blob->pbData, blob->cbData);
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}
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TRACE("returning %d\n", ret);
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return ret;
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}
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BOOL WINAPI WVTAsn1SpcLinkEncode(DWORD dwCertEncodingType,
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LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
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DWORD *pcbEncoded)
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{
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BOOL ret = FALSE;
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TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
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debugstr_a(lpszStructType), pvStructInfo, pbEncoded,
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pcbEncoded);
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__TRY
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{
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const SPC_LINK *link = (const SPC_LINK *)pvStructInfo;
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DWORD bytesNeeded, lenBytes;
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switch (link->dwLinkChoice)
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{
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case SPC_FILE_LINK_CHOICE:
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{
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DWORD fileNameLen, fileNameLenBytes;
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LPWSTR ptr;
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fileNameLen = link->u.pwszFile ?
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lstrlenW(link->u.pwszFile) * sizeof(WCHAR) : 0;
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CRYPT_EncodeLen(fileNameLen, NULL, &fileNameLenBytes);
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CRYPT_EncodeLen(1 + fileNameLenBytes + fileNameLen, NULL,
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&lenBytes);
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bytesNeeded = 2 + lenBytes + fileNameLenBytes + fileNameLen;
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if (!pbEncoded)
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{
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*pcbEncoded = bytesNeeded;
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ret = TRUE;
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}
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else if (*pcbEncoded < bytesNeeded)
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{
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SetLastError(ERROR_MORE_DATA);
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*pcbEncoded = bytesNeeded;
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}
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else
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{
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*pcbEncoded = bytesNeeded;
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*pbEncoded++ = ASN_CONSTRUCTOR | ASN_CONTEXT | 2;
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CRYPT_EncodeLen(1 + fileNameLenBytes + fileNameLen, pbEncoded,
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&lenBytes);
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pbEncoded += lenBytes;
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*pbEncoded++ = ASN_CONTEXT;
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CRYPT_EncodeLen(fileNameLen, pbEncoded, &fileNameLenBytes);
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pbEncoded += fileNameLenBytes;
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for (ptr = link->u.pwszFile; ptr && *ptr; ptr++)
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{
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*(WCHAR *)pbEncoded = hton16(*ptr);
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pbEncoded += sizeof(WCHAR);
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}
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ret = TRUE;
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}
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break;
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}
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case SPC_MONIKER_LINK_CHOICE:
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{
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DWORD classIdLenBytes, dataLenBytes, dataLen;
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CRYPT_DATA_BLOB classId = { sizeof(link->u.Moniker.ClassId),
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(BYTE *)&link->u.Moniker.ClassId };
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CRYPT_EncodeLen(classId.cbData, NULL, &classIdLenBytes);
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CRYPT_EncodeLen(link->u.Moniker.SerializedData.cbData, NULL,
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&dataLenBytes);
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dataLen = 2 + classIdLenBytes + classId.cbData +
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dataLenBytes + link->u.Moniker.SerializedData.cbData;
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CRYPT_EncodeLen(dataLen, NULL, &lenBytes);
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bytesNeeded = 1 + dataLen + lenBytes;
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if (!pbEncoded)
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{
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*pcbEncoded = bytesNeeded;
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ret = TRUE;
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}
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else if (*pcbEncoded < bytesNeeded)
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{
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SetLastError(ERROR_MORE_DATA);
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*pcbEncoded = bytesNeeded;
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}
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else
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{
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DWORD size;
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*pcbEncoded = bytesNeeded;
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*pbEncoded++ = ASN_CONSTRUCTOR | ASN_CONTEXT | 1;
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CRYPT_EncodeLen(dataLen, pbEncoded, &lenBytes);
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pbEncoded += lenBytes;
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size = 1 + classIdLenBytes + classId.cbData;
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CRYPT_AsnEncodeOctets(X509_ASN_ENCODING, NULL, &classId,
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pbEncoded, &size);
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pbEncoded += size;
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size = 1 + dataLenBytes + link->u.Moniker.SerializedData.cbData;
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CRYPT_AsnEncodeOctets(X509_ASN_ENCODING, NULL,
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&link->u.Moniker.SerializedData, pbEncoded, &size);
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pbEncoded += size;
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ret = TRUE;
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}
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break;
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}
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case SPC_URL_LINK_CHOICE:
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{
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LPWSTR ptr;
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DWORD urlLen;
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/* Check for invalid characters in URL */
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ret = TRUE;
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urlLen = 0;
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for (ptr = link->u.pwszUrl; ptr && *ptr && ret; ptr++)
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if (*ptr > 0x7f)
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{
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*pcbEncoded = 0;
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SetLastError(CRYPT_E_INVALID_IA5_STRING);
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ret = FALSE;
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}
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else
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urlLen++;
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if (ret)
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{
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CRYPT_EncodeLen(urlLen, NULL, &lenBytes);
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bytesNeeded = 1 + lenBytes + urlLen;
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if (!pbEncoded)
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*pcbEncoded = bytesNeeded;
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else if (*pcbEncoded < bytesNeeded)
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{
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SetLastError(ERROR_MORE_DATA);
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*pcbEncoded = bytesNeeded;
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ret = FALSE;
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}
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else
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{
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*pcbEncoded = bytesNeeded;
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*pbEncoded++ = ASN_CONTEXT;
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CRYPT_EncodeLen(urlLen, pbEncoded, &lenBytes);
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pbEncoded += lenBytes;
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for (ptr = link->u.pwszUrl; ptr && *ptr; ptr++)
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*pbEncoded++ = (BYTE)*ptr;
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}
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}
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break;
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}
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default:
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SetLastError(E_INVALIDARG);
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}
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}
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__EXCEPT_PAGE_FAULT
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{
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SetLastError(STATUS_ACCESS_VIOLATION);
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}
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__ENDTRY
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TRACE("returning %d\n", ret);
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return ret;
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}
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typedef BOOL (WINAPI *CryptEncodeObjectFunc)(DWORD, LPCSTR, const void *,
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BYTE *, DWORD *);
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struct AsnEncodeSequenceItem
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{
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const void *pvStructInfo;
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CryptEncodeObjectFunc encodeFunc;
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DWORD size; /* used during encoding, not for your use */
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};
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static BOOL WINAPI CRYPT_AsnEncodeSequence(DWORD dwCertEncodingType,
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struct AsnEncodeSequenceItem items[], DWORD cItem, BYTE *pbEncoded,
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DWORD *pcbEncoded)
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{
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BOOL ret;
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DWORD i, dataLen = 0;
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TRACE("%p, %d, %p, %d\n", items, cItem, pbEncoded, *pcbEncoded);
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for (i = 0, ret = TRUE; ret && i < cItem; i++)
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{
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ret = items[i].encodeFunc(dwCertEncodingType, NULL,
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items[i].pvStructInfo, NULL, &items[i].size);
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/* Some functions propagate their errors through the size */
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if (!ret)
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*pcbEncoded = items[i].size;
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dataLen += items[i].size;
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}
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if (ret)
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{
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DWORD lenBytes, bytesNeeded;
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CRYPT_EncodeLen(dataLen, NULL, &lenBytes);
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bytesNeeded = 1 + lenBytes + dataLen;
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if (!pbEncoded)
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*pcbEncoded = bytesNeeded;
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else if (*pcbEncoded < bytesNeeded)
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{
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*pcbEncoded = bytesNeeded;
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SetLastError(ERROR_MORE_DATA);
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ret = FALSE;
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}
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else
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{
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*pcbEncoded = bytesNeeded;
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*pbEncoded++ = ASN_SEQUENCE;
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CRYPT_EncodeLen(dataLen, pbEncoded, &lenBytes);
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pbEncoded += lenBytes;
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for (i = 0; ret && i < cItem; i++)
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{
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ret = items[i].encodeFunc(dwCertEncodingType, NULL,
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items[i].pvStructInfo, pbEncoded, &items[i].size);
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/* Some functions propagate their errors through the size */
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if (!ret)
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*pcbEncoded = items[i].size;
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pbEncoded += items[i].size;
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}
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}
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}
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TRACE("returning %d\n", ret);
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return ret;
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}
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static BOOL WINAPI CRYPT_AsnEncodeBits(DWORD dwCertEncodingType,
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LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
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DWORD *pcbEncoded)
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{
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BOOL ret = FALSE;
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__TRY
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{
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const CRYPT_BIT_BLOB *blob = (const CRYPT_BIT_BLOB *)pvStructInfo;
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DWORD bytesNeeded, lenBytes, dataBytes;
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BYTE unusedBits;
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/* yep, MS allows cUnusedBits to be >= 8 */
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if (!blob->cUnusedBits)
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{
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dataBytes = blob->cbData;
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unusedBits = 0;
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}
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else if (blob->cbData * 8 > blob->cUnusedBits)
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{
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dataBytes = (blob->cbData * 8 - blob->cUnusedBits) / 8 + 1;
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unusedBits = blob->cUnusedBits >= 8 ? blob->cUnusedBits / 8 :
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blob->cUnusedBits;
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}
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else
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{
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dataBytes = 0;
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unusedBits = 0;
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}
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CRYPT_EncodeLen(dataBytes + 1, NULL, &lenBytes);
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bytesNeeded = 1 + lenBytes + dataBytes + 1;
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if (!pbEncoded)
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{
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*pcbEncoded = bytesNeeded;
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ret = TRUE;
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}
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else if (*pcbEncoded < bytesNeeded)
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{
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*pcbEncoded = bytesNeeded;
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SetLastError(ERROR_MORE_DATA);
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}
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else
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{
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ret = TRUE;
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*pcbEncoded = bytesNeeded;
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*pbEncoded++ = ASN_BITSTRING;
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CRYPT_EncodeLen(dataBytes + 1, pbEncoded, &lenBytes);
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pbEncoded += lenBytes;
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*pbEncoded++ = unusedBits;
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if (dataBytes)
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{
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BYTE mask = 0xff << unusedBits;
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if (dataBytes > 1)
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{
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memcpy(pbEncoded, blob->pbData, dataBytes - 1);
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pbEncoded += dataBytes - 1;
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}
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*pbEncoded = *(blob->pbData + dataBytes - 1) & mask;
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}
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}
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}
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__EXCEPT_PAGE_FAULT
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{
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SetLastError(STATUS_ACCESS_VIOLATION);
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}
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__ENDTRY
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return ret;
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}
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struct AsnConstructedItem
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{
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BYTE tag;
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const void *pvStructInfo;
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CryptEncodeObjectFunc encodeFunc;
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};
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static BOOL WINAPI CRYPT_AsnEncodeConstructed(DWORD dwCertEncodingType,
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LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
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DWORD *pcbEncoded)
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{
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BOOL ret;
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const struct AsnConstructedItem *item =
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(const struct AsnConstructedItem *)pvStructInfo;
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DWORD len;
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if ((ret = item->encodeFunc(dwCertEncodingType, lpszStructType,
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item->pvStructInfo, NULL, &len)))
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{
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DWORD dataLen, bytesNeeded;
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CRYPT_EncodeLen(len, NULL, &dataLen);
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bytesNeeded = 1 + dataLen + len;
|
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if (!pbEncoded)
|
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*pcbEncoded = bytesNeeded;
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else if (*pcbEncoded < bytesNeeded)
|
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{
|
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*pcbEncoded = bytesNeeded;
|
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SetLastError(ERROR_MORE_DATA);
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ret = FALSE;
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}
|
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else
|
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{
|
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*pcbEncoded = bytesNeeded;
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*pbEncoded++ = ASN_CONTEXT | ASN_CONSTRUCTOR | item->tag;
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CRYPT_EncodeLen(len, pbEncoded, &dataLen);
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pbEncoded += dataLen;
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ret = item->encodeFunc(dwCertEncodingType, lpszStructType,
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item->pvStructInfo, pbEncoded, &len);
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if (!ret)
|
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{
|
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/* Some functions propagate their errors through the size */
|
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*pcbEncoded = len;
|
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}
|
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}
|
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}
|
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else
|
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{
|
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/* Some functions propagate their errors through the size */
|
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*pcbEncoded = len;
|
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}
|
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return ret;
|
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}
|
|
|
|
|
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BOOL WINAPI WVTAsn1SpcPeImageDataEncode(DWORD dwCertEncodingType,
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LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
|
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DWORD *pcbEncoded)
|
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{
|
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const SPC_PE_IMAGE_DATA *imageData =
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(const SPC_PE_IMAGE_DATA *)pvStructInfo;
|
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BOOL ret = FALSE;
|
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|
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TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
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debugstr_a(lpszStructType), pvStructInfo, pbEncoded,
|
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pcbEncoded);
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__TRY
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{
|
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struct AsnEncodeSequenceItem items[2] = {
|
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{ 0 }
|
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};
|
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struct AsnConstructedItem constructed = { 0, imageData->pFile,
|
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WVTAsn1SpcLinkEncode };
|
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DWORD cItem = 0;
|
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|
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if (imageData->Flags.cbData)
|
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{
|
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items[cItem].pvStructInfo = &imageData->Flags;
|
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items[cItem].encodeFunc = CRYPT_AsnEncodeBits;
|
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cItem++;
|
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}
|
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if (imageData->pFile)
|
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{
|
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items[cItem].pvStructInfo = &constructed;
|
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items[cItem].encodeFunc = CRYPT_AsnEncodeConstructed;
|
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cItem++;
|
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}
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ret = CRYPT_AsnEncodeSequence(dwCertEncodingType, items, cItem,
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pbEncoded, pcbEncoded);
|
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}
|
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__EXCEPT_PAGE_FAULT
|
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{
|
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SetLastError(STATUS_ACCESS_VIOLATION);
|
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}
|
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__ENDTRY
|
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TRACE("returning %d\n", ret);
|
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return ret;
|
|
}
|
|
|
|
static BOOL WINAPI CRYPT_AsnEncodeOid(DWORD dwCertEncodingType,
|
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LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
|
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DWORD *pcbEncoded)
|
|
{
|
|
LPCSTR pszObjId = (LPCSTR)pvStructInfo;
|
|
DWORD bytesNeeded = 0, lenBytes;
|
|
BOOL ret = TRUE;
|
|
int firstPos = 0;
|
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BYTE firstByte = 0;
|
|
|
|
TRACE("%s\n", debugstr_a(pszObjId));
|
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|
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if (pszObjId)
|
|
{
|
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const char *ptr;
|
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int val1, val2;
|
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|
|
if (sscanf(pszObjId, "%d.%d.%n", &val1, &val2, &firstPos) != 2)
|
|
{
|
|
SetLastError(CRYPT_E_ASN1_ERROR);
|
|
return FALSE;
|
|
}
|
|
bytesNeeded++;
|
|
firstByte = val1 * 40 + val2;
|
|
ptr = pszObjId + firstPos;
|
|
while (ret && *ptr)
|
|
{
|
|
int pos;
|
|
|
|
/* note I assume each component is at most 32-bits long in base 2 */
|
|
if (sscanf(ptr, "%d%n", &val1, &pos) == 1)
|
|
{
|
|
if (val1 >= 0x10000000)
|
|
bytesNeeded += 5;
|
|
else if (val1 >= 0x200000)
|
|
bytesNeeded += 4;
|
|
else if (val1 >= 0x4000)
|
|
bytesNeeded += 3;
|
|
else if (val1 >= 0x80)
|
|
bytesNeeded += 2;
|
|
else
|
|
bytesNeeded += 1;
|
|
ptr += pos;
|
|
if (*ptr == '.')
|
|
ptr++;
|
|
}
|
|
else
|
|
{
|
|
SetLastError(CRYPT_E_ASN1_ERROR);
|
|
return FALSE;
|
|
}
|
|
}
|
|
CRYPT_EncodeLen(bytesNeeded, NULL, &lenBytes);
|
|
}
|
|
else
|
|
lenBytes = 1;
|
|
bytesNeeded += 1 + lenBytes;
|
|
if (pbEncoded)
|
|
{
|
|
if (*pcbEncoded < bytesNeeded)
|
|
{
|
|
SetLastError(ERROR_MORE_DATA);
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
{
|
|
*pbEncoded++ = ASN_OBJECTIDENTIFIER;
|
|
CRYPT_EncodeLen(bytesNeeded - 1 - lenBytes, pbEncoded, &lenBytes);
|
|
pbEncoded += lenBytes;
|
|
if (pszObjId)
|
|
{
|
|
const char *ptr;
|
|
int val, pos;
|
|
|
|
*pbEncoded++ = firstByte;
|
|
ptr = pszObjId + firstPos;
|
|
while (ret && *ptr)
|
|
{
|
|
sscanf(ptr, "%d%n", &val, &pos);
|
|
{
|
|
unsigned char outBytes[5];
|
|
int numBytes, i;
|
|
|
|
if (val >= 0x10000000)
|
|
numBytes = 5;
|
|
else if (val >= 0x200000)
|
|
numBytes = 4;
|
|
else if (val >= 0x4000)
|
|
numBytes = 3;
|
|
else if (val >= 0x80)
|
|
numBytes = 2;
|
|
else
|
|
numBytes = 1;
|
|
for (i = numBytes; i > 0; i--)
|
|
{
|
|
outBytes[i - 1] = val & 0x7f;
|
|
val >>= 7;
|
|
}
|
|
for (i = 0; i < numBytes - 1; i++)
|
|
*pbEncoded++ = outBytes[i] | 0x80;
|
|
*pbEncoded++ = outBytes[i];
|
|
ptr += pos;
|
|
if (*ptr == '.')
|
|
ptr++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
*pcbEncoded = bytesNeeded;
|
|
return ret;
|
|
}
|
|
|
|
static BOOL WINAPI CRYPT_CopyEncodedBlob(DWORD dwCertEncodingType,
|
|
LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
|
|
DWORD *pcbEncoded)
|
|
{
|
|
const CRYPT_DER_BLOB *blob = (const CRYPT_DER_BLOB *)pvStructInfo;
|
|
BOOL ret = TRUE;
|
|
|
|
if (!pbEncoded)
|
|
*pcbEncoded = blob->cbData;
|
|
else if (*pcbEncoded < blob->cbData)
|
|
{
|
|
*pcbEncoded = blob->cbData;
|
|
SetLastError(ERROR_MORE_DATA);
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
{
|
|
if (blob->cbData)
|
|
memcpy(pbEncoded, blob->pbData, blob->cbData);
|
|
*pcbEncoded = blob->cbData;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static BOOL WINAPI CRYPT_AsnEncodeAlgorithmIdWithNullParams(
|
|
DWORD dwCertEncodingType, LPCSTR lpszStructType, const void *pvStructInfo,
|
|
BYTE *pbEncoded, DWORD *pcbEncoded)
|
|
{
|
|
const CRYPT_ALGORITHM_IDENTIFIER *algo =
|
|
(const CRYPT_ALGORITHM_IDENTIFIER *)pvStructInfo;
|
|
static const BYTE asn1Null[] = { ASN_NULL, 0 };
|
|
static const CRYPT_DATA_BLOB nullBlob = { sizeof(asn1Null),
|
|
(LPBYTE)asn1Null };
|
|
BOOL ret;
|
|
struct AsnEncodeSequenceItem items[2] = {
|
|
{ algo->pszObjId, CRYPT_AsnEncodeOid, 0 },
|
|
{ NULL, CRYPT_CopyEncodedBlob, 0 },
|
|
};
|
|
|
|
if (algo->Parameters.cbData)
|
|
items[1].pvStructInfo = &algo->Parameters;
|
|
else
|
|
items[1].pvStructInfo = &nullBlob;
|
|
ret = CRYPT_AsnEncodeSequence(dwCertEncodingType, items,
|
|
sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
|
|
return ret;
|
|
}
|
|
|
|
static BOOL WINAPI CRYPT_AsnEncodeAttributeTypeValue(DWORD dwCertEncodingType,
|
|
LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
|
|
DWORD *pcbEncoded)
|
|
{
|
|
const CRYPT_ATTRIBUTE_TYPE_VALUE *typeValue =
|
|
(const CRYPT_ATTRIBUTE_TYPE_VALUE *)pvStructInfo;
|
|
struct AsnEncodeSequenceItem items[] = {
|
|
{ &typeValue->pszObjId, CRYPT_AsnEncodeOid, 0 },
|
|
{ &typeValue->Value, CRYPT_CopyEncodedBlob, 0 },
|
|
};
|
|
|
|
return CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
|
|
items, sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
|
|
}
|
|
|
|
struct SPCDigest
|
|
{
|
|
CRYPT_ALGORITHM_IDENTIFIER DigestAlgorithm;
|
|
CRYPT_HASH_BLOB Digest;
|
|
};
|
|
|
|
static BOOL WINAPI CRYPT_AsnEncodeSPCDigest(DWORD dwCertEncodingType,
|
|
LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
|
|
DWORD *pcbEncoded)
|
|
{
|
|
const struct SPCDigest *digest = (const struct SPCDigest *)pvStructInfo;
|
|
struct AsnEncodeSequenceItem items[] = {
|
|
{ &digest->DigestAlgorithm, CRYPT_AsnEncodeAlgorithmIdWithNullParams, 0 },
|
|
{ &digest->Digest, CRYPT_CopyEncodedBlob, 0 },
|
|
};
|
|
|
|
return CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
|
|
items, sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
|
|
}
|
|
|
|
BOOL WINAPI WVTAsn1SpcIndirectDataContentEncode(DWORD dwCertEncodingType,
|
|
LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
|
|
DWORD *pcbEncoded)
|
|
{
|
|
BOOL ret = FALSE;
|
|
|
|
TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
|
|
debugstr_a(lpszStructType), pvStructInfo, pbEncoded, pcbEncoded);
|
|
|
|
__TRY
|
|
{
|
|
const SPC_INDIRECT_DATA_CONTENT *data =
|
|
(const SPC_INDIRECT_DATA_CONTENT *)pvStructInfo;
|
|
struct AsnEncodeSequenceItem items[] = {
|
|
{ &data->Data, CRYPT_AsnEncodeAttributeTypeValue, 0 },
|
|
{ &data->DigestAlgorithm, CRYPT_AsnEncodeSPCDigest, 0 },
|
|
};
|
|
|
|
ret = CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
|
|
items, sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
|
|
}
|
|
__EXCEPT_PAGE_FAULT
|
|
{
|
|
SetLastError(STATUS_ACCESS_VIOLATION);
|
|
}
|
|
__ENDTRY
|
|
return ret;
|
|
}
|
|
|
|
/* Gets the number of length bytes from the given (leading) length byte */
|
|
#define GET_LEN_BYTES(b) ((b) <= 0x7f ? 1 : 1 + ((b) & 0x7f))
|
|
|
|
/* Helper function to get the encoded length of the data starting at pbEncoded,
|
|
* where pbEncoded[0] is the tag. If the data are too short to contain a
|
|
* length or if the length is too large for cbEncoded, sets an appropriate
|
|
* error code and returns FALSE.
|
|
*/
|
|
static BOOL CRYPT_GetLen(const BYTE *pbEncoded, DWORD cbEncoded, DWORD *len)
|
|
{
|
|
BOOL ret;
|
|
|
|
if (cbEncoded <= 1)
|
|
{
|
|
SetLastError(CRYPT_E_ASN1_CORRUPT);
|
|
ret = FALSE;
|
|
}
|
|
else if (pbEncoded[1] <= 0x7f)
|
|
{
|
|
if (pbEncoded[1] + 1 > cbEncoded)
|
|
{
|
|
SetLastError(CRYPT_E_ASN1_EOD);
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
{
|
|
*len = pbEncoded[1];
|
|
ret = TRUE;
|
|
}
|
|
}
|
|
else if (pbEncoded[1] == 0x80)
|
|
{
|
|
FIXME("unimplemented for indefinite-length encoding\n");
|
|
SetLastError(CRYPT_E_ASN1_CORRUPT);
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
{
|
|
BYTE lenLen = GET_LEN_BYTES(pbEncoded[1]);
|
|
|
|
if (lenLen > sizeof(DWORD) + 1)
|
|
{
|
|
SetLastError(CRYPT_E_ASN1_LARGE);
|
|
ret = FALSE;
|
|
}
|
|
else if (lenLen + 2 > cbEncoded)
|
|
{
|
|
SetLastError(CRYPT_E_ASN1_CORRUPT);
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
{
|
|
DWORD out = 0;
|
|
|
|
pbEncoded += 2;
|
|
while (--lenLen)
|
|
{
|
|
out <<= 8;
|
|
out |= *pbEncoded++;
|
|
}
|
|
if (out + lenLen + 1 > cbEncoded)
|
|
{
|
|
SetLastError(CRYPT_E_ASN1_EOD);
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
{
|
|
*len = out;
|
|
ret = TRUE;
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static BOOL WINAPI CRYPT_AsnDecodeOctets(DWORD dwCertEncodingType,
|
|
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
|
|
void *pvStructInfo, DWORD *pcbStructInfo)
|
|
{
|
|
BOOL ret;
|
|
DWORD bytesNeeded, dataLen;
|
|
|
|
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
|
|
pvStructInfo, *pcbStructInfo);
|
|
|
|
if (!cbEncoded)
|
|
{
|
|
SetLastError(CRYPT_E_ASN1_CORRUPT);
|
|
ret = FALSE;
|
|
}
|
|
else if (pbEncoded[0] != ASN_OCTETSTRING)
|
|
{
|
|
SetLastError(CRYPT_E_ASN1_BADTAG);
|
|
ret = FALSE;
|
|
}
|
|
else if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
|
|
{
|
|
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
|
|
bytesNeeded = sizeof(CRYPT_DATA_BLOB);
|
|
else
|
|
bytesNeeded = dataLen + sizeof(CRYPT_DATA_BLOB);
|
|
if (!pvStructInfo)
|
|
*pcbStructInfo = bytesNeeded;
|
|
else if (*pcbStructInfo < bytesNeeded)
|
|
{
|
|
SetLastError(ERROR_MORE_DATA);
|
|
*pcbStructInfo = bytesNeeded;
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
{
|
|
CRYPT_DATA_BLOB *blob;
|
|
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
|
|
|
|
blob = (CRYPT_DATA_BLOB *)pvStructInfo;
|
|
blob->cbData = dataLen;
|
|
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
|
|
blob->pbData = (BYTE *)pbEncoded + 1 + lenBytes;
|
|
else
|
|
{
|
|
assert(blob->pbData);
|
|
if (blob->cbData)
|
|
memcpy(blob->pbData, pbEncoded + 1 + lenBytes,
|
|
blob->cbData);
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static BOOL WINAPI CRYPT_AsnDecodeSPCLinkInternal(DWORD dwCertEncodingType,
|
|
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
|
|
void *pvStructInfo, DWORD *pcbStructInfo)
|
|
{
|
|
BOOL ret = FALSE;
|
|
DWORD bytesNeeded = sizeof(SPC_LINK), 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 realDataLen;
|
|
|
|
switch (pbEncoded[0])
|
|
{
|
|
case ASN_CONTEXT:
|
|
bytesNeeded += (dataLen + 1) * sizeof(WCHAR);
|
|
if (!pvStructInfo)
|
|
*pcbStructInfo = bytesNeeded;
|
|
else if (*pcbStructInfo < bytesNeeded)
|
|
{
|
|
*pcbStructInfo = bytesNeeded;
|
|
SetLastError(ERROR_MORE_DATA);
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
{
|
|
PSPC_LINK link = (PSPC_LINK)pvStructInfo;
|
|
DWORD i;
|
|
|
|
link->dwLinkChoice = SPC_URL_LINK_CHOICE;
|
|
for (i = 0; i < dataLen; i++)
|
|
link->u.pwszUrl[i] =
|
|
*(pbEncoded + 1 + lenBytes + i);
|
|
link->u.pwszUrl[i] = '\0';
|
|
TRACE("returning url %s\n", debugstr_w(link->u.pwszUrl));
|
|
}
|
|
break;
|
|
case ASN_CONSTRUCTOR | ASN_CONTEXT | 1:
|
|
{
|
|
CRYPT_DATA_BLOB classId;
|
|
DWORD size = sizeof(classId);
|
|
|
|
if ((ret = CRYPT_AsnDecodeOctets(dwCertEncodingType, NULL,
|
|
pbEncoded + 1 + lenBytes, cbEncoded - 1 - lenBytes,
|
|
CRYPT_DECODE_NOCOPY_FLAG, &classId, &size)))
|
|
{
|
|
if (classId.cbData != sizeof(SPC_UUID))
|
|
{
|
|
SetLastError(CRYPT_E_BAD_ENCODE);
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
{
|
|
CRYPT_DATA_BLOB data;
|
|
|
|
/* The tag length for the classId must be 1 since the
|
|
* length is correct.
|
|
*/
|
|
size = sizeof(data);
|
|
if ((ret = CRYPT_AsnDecodeOctets(dwCertEncodingType, NULL,
|
|
pbEncoded + 3 + lenBytes + classId.cbData,
|
|
cbEncoded - 3 - lenBytes - classId.cbData,
|
|
CRYPT_DECODE_NOCOPY_FLAG, &data, &size)))
|
|
{
|
|
bytesNeeded += data.cbData;
|
|
if (!pvStructInfo)
|
|
*pcbStructInfo = bytesNeeded;
|
|
else if (*pcbStructInfo < bytesNeeded)
|
|
{
|
|
*pcbStructInfo = bytesNeeded;
|
|
SetLastError(ERROR_MORE_DATA);
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
{
|
|
PSPC_LINK link = (PSPC_LINK)pvStructInfo;
|
|
|
|
link->dwLinkChoice = SPC_MONIKER_LINK_CHOICE;
|
|
/* pwszFile pointer was set by caller, copy it
|
|
* before overwriting it
|
|
*/
|
|
link->u.Moniker.SerializedData.pbData =
|
|
(BYTE *)link->u.pwszFile;
|
|
memcpy(&link->u.Moniker.ClassId, classId.pbData,
|
|
classId.cbData);
|
|
memcpy(link->u.Moniker.SerializedData.pbData,
|
|
data.pbData, data.cbData);
|
|
link->u.Moniker.SerializedData.cbData = data.cbData;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case ASN_CONSTRUCTOR | ASN_CONTEXT | 2:
|
|
if (dataLen && pbEncoded[1 + lenBytes] != ASN_CONTEXT)
|
|
SetLastError(CRYPT_E_ASN1_BADTAG);
|
|
else if ((ret = CRYPT_GetLen(pbEncoded + 1 + lenBytes, dataLen,
|
|
&realDataLen)))
|
|
{
|
|
BYTE realLenBytes = GET_LEN_BYTES(pbEncoded[2 + lenBytes]);
|
|
|
|
bytesNeeded += realDataLen + sizeof(WCHAR);
|
|
if (!pvStructInfo)
|
|
*pcbStructInfo = bytesNeeded;
|
|
else if (*pcbStructInfo < bytesNeeded)
|
|
{
|
|
*pcbStructInfo = bytesNeeded;
|
|
SetLastError(ERROR_MORE_DATA);
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
{
|
|
PSPC_LINK link = (PSPC_LINK)pvStructInfo;
|
|
DWORD i;
|
|
const BYTE *ptr = pbEncoded + 2 + lenBytes + realLenBytes;
|
|
|
|
link->dwLinkChoice = SPC_FILE_LINK_CHOICE;
|
|
for (i = 0; i < dataLen / sizeof(WCHAR); i++)
|
|
link->u.pwszFile[i] =
|
|
hton16(*(WORD *)(ptr + i * sizeof(WCHAR)));
|
|
link->u.pwszFile[realDataLen / sizeof(WCHAR)] = '\0';
|
|
TRACE("returning file %s\n", debugstr_w(link->u.pwszFile));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
bytesNeeded += sizeof(WCHAR);
|
|
if (!pvStructInfo)
|
|
*pcbStructInfo = bytesNeeded;
|
|
else if (*pcbStructInfo < bytesNeeded)
|
|
{
|
|
*pcbStructInfo = bytesNeeded;
|
|
SetLastError(ERROR_MORE_DATA);
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
{
|
|
PSPC_LINK link = (PSPC_LINK)pvStructInfo;
|
|
|
|
link->dwLinkChoice = SPC_FILE_LINK_CHOICE;
|
|
link->u.pwszFile[0] = '\0';
|
|
ret = TRUE;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
SetLastError(CRYPT_E_ASN1_BADTAG);
|
|
}
|
|
}
|
|
TRACE("returning %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
BOOL WINAPI WVTAsn1SpcLinkDecode(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
|
|
{
|
|
DWORD bytesNeeded;
|
|
|
|
ret = CRYPT_AsnDecodeSPCLinkInternal(dwCertEncodingType,
|
|
lpszStructType, pbEncoded, cbEncoded, dwFlags, NULL, &bytesNeeded);
|
|
if (ret)
|
|
{
|
|
if (!pvStructInfo)
|
|
*pcbStructInfo = bytesNeeded;
|
|
else if (*pcbStructInfo < bytesNeeded)
|
|
{
|
|
*pcbStructInfo = bytesNeeded;
|
|
SetLastError(ERROR_MORE_DATA);
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
{
|
|
SPC_LINK *link = (SPC_LINK *)pvStructInfo;
|
|
|
|
link->u.pwszFile =
|
|
(LPWSTR)((BYTE *)pvStructInfo + sizeof(SPC_LINK));
|
|
ret = CRYPT_AsnDecodeSPCLinkInternal(dwCertEncodingType,
|
|
lpszStructType, pbEncoded, cbEncoded, dwFlags, pvStructInfo,
|
|
pcbStructInfo);
|
|
}
|
|
}
|
|
}
|
|
__EXCEPT_PAGE_FAULT
|
|
{
|
|
SetLastError(STATUS_ACCESS_VIOLATION);
|
|
}
|
|
__ENDTRY
|
|
TRACE("returning %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
typedef BOOL (WINAPI *CryptDecodeObjectFunc)(DWORD, LPCSTR, const BYTE *,
|
|
DWORD, DWORD, void *, DWORD *);
|
|
|
|
/* tag:
|
|
* The expected tag of the item. If tag is 0, decodeFunc is called
|
|
* regardless of the tag value seen.
|
|
* offset:
|
|
* A sequence is decoded into a struct. The offset member is the
|
|
* offset of this item within that struct.
|
|
* decodeFunc:
|
|
* The decoder function to use. If this is NULL, then the member isn't
|
|
* decoded, but minSize space is reserved for it.
|
|
* minSize:
|
|
* The minimum amount of space occupied after decoding. You must set this.
|
|
* optional:
|
|
* If true, and the tag doesn't match the expected tag for this item,
|
|
* or the decodeFunc fails with CRYPT_E_ASN1_BADTAG, then minSize space is
|
|
* filled with 0 for this member.
|
|
* hasPointer, pointerOffset:
|
|
* If the item has dynamic data, set hasPointer to TRUE, pointerOffset to
|
|
* the offset within the struct of the data pointer (or to the
|
|
* first data pointer, if more than one exist).
|
|
* size:
|
|
* Used by CRYPT_AsnDecodeSequence, not for your use.
|
|
*/
|
|
struct AsnDecodeSequenceItem
|
|
{
|
|
BYTE tag;
|
|
DWORD offset;
|
|
CryptDecodeObjectFunc decodeFunc;
|
|
DWORD minSize;
|
|
BOOL optional;
|
|
BOOL hasPointer;
|
|
DWORD pointerOffset;
|
|
DWORD size;
|
|
};
|
|
|
|
/* Decodes the items in a sequence, where the items are described in items,
|
|
* the encoded data are in pbEncoded with length cbEncoded. Decodes into
|
|
* pvStructInfo. nextData is a pointer to the memory location at which the
|
|
* first decoded item with a dynamic pointer should point.
|
|
* Upon decoding, *cbDecoded is the total number of bytes decoded.
|
|
*/
|
|
static BOOL CRYPT_AsnDecodeSequenceItems(DWORD dwCertEncodingType,
|
|
struct AsnDecodeSequenceItem items[], DWORD cItem, const BYTE *pbEncoded,
|
|
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, BYTE *nextData,
|
|
DWORD *cbDecoded)
|
|
{
|
|
BOOL ret;
|
|
DWORD i, decoded = 0;
|
|
const BYTE *ptr = pbEncoded;
|
|
|
|
TRACE("%p, %d, %p, %d, %08x, %p, %p, %p\n", items, cItem, pbEncoded,
|
|
cbEncoded, dwFlags, pvStructInfo, nextData, cbDecoded);
|
|
|
|
for (i = 0, ret = TRUE; ret && i < cItem; i++)
|
|
{
|
|
if (cbEncoded - (ptr - pbEncoded) != 0)
|
|
{
|
|
DWORD nextItemLen;
|
|
|
|
if ((ret = CRYPT_GetLen(ptr, cbEncoded - (ptr - pbEncoded),
|
|
&nextItemLen)))
|
|
{
|
|
BYTE nextItemLenBytes = GET_LEN_BYTES(ptr[1]);
|
|
|
|
if (ptr[0] == items[i].tag || !items[i].tag)
|
|
{
|
|
if (nextData && pvStructInfo && items[i].hasPointer)
|
|
{
|
|
TRACE("Setting next pointer to %p\n",
|
|
nextData);
|
|
*(BYTE **)((BYTE *)pvStructInfo +
|
|
items[i].pointerOffset) = nextData;
|
|
}
|
|
if (items[i].decodeFunc)
|
|
{
|
|
if (pvStructInfo)
|
|
TRACE("decoding item %d\n", i);
|
|
else
|
|
TRACE("sizing item %d\n", i);
|
|
ret = items[i].decodeFunc(dwCertEncodingType,
|
|
NULL, ptr, 1 + nextItemLenBytes + nextItemLen,
|
|
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG,
|
|
pvStructInfo ? (BYTE *)pvStructInfo + items[i].offset
|
|
: NULL, &items[i].size);
|
|
if (ret)
|
|
{
|
|
/* Account for alignment padding */
|
|
if (items[i].size % sizeof(DWORD))
|
|
items[i].size += sizeof(DWORD) -
|
|
items[i].size % sizeof(DWORD);
|
|
TRACE("item %d size: %d\n", i, items[i].size);
|
|
if (nextData && items[i].hasPointer &&
|
|
items[i].size > items[i].minSize)
|
|
nextData += items[i].size - items[i].minSize;
|
|
ptr += 1 + nextItemLenBytes + nextItemLen;
|
|
decoded += 1 + nextItemLenBytes + nextItemLen;
|
|
TRACE("item %d: decoded %d bytes\n", i,
|
|
1 + nextItemLenBytes + nextItemLen);
|
|
}
|
|
else if (items[i].optional &&
|
|
GetLastError() == CRYPT_E_ASN1_BADTAG)
|
|
{
|
|
TRACE("skipping optional item %d\n", i);
|
|
items[i].size = items[i].minSize;
|
|
SetLastError(NOERROR);
|
|
ret = TRUE;
|
|
}
|
|
else
|
|
TRACE("item %d failed: %08x\n", i,
|
|
GetLastError());
|
|
}
|
|
else
|
|
{
|
|
TRACE("item %d: decoded %d bytes\n", i,
|
|
1 + nextItemLenBytes + nextItemLen);
|
|
ptr += 1 + nextItemLenBytes + nextItemLen;
|
|
decoded += 1 + nextItemLenBytes + nextItemLen;
|
|
items[i].size = items[i].minSize;
|
|
}
|
|
}
|
|
else if (items[i].optional)
|
|
{
|
|
TRACE("skipping optional item %d\n", i);
|
|
items[i].size = items[i].minSize;
|
|
}
|
|
else
|
|
{
|
|
TRACE("item %d: tag %02x doesn't match expected %02x\n",
|
|
i, ptr[0], items[i].tag);
|
|
SetLastError(CRYPT_E_ASN1_BADTAG);
|
|
ret = FALSE;
|
|
}
|
|
}
|
|
}
|
|
else if (items[i].optional)
|
|
{
|
|
TRACE("missing optional item %d, skipping\n", i);
|
|
items[i].size = items[i].minSize;
|
|
}
|
|
else
|
|
{
|
|
TRACE("not enough bytes for item %d, failing\n", i);
|
|
SetLastError(CRYPT_E_ASN1_CORRUPT);
|
|
ret = FALSE;
|
|
}
|
|
}
|
|
if (ret)
|
|
*cbDecoded = decoded;
|
|
TRACE("returning %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
/* This decodes an arbitrary sequence into a contiguous block of memory
|
|
* (basically, a struct.) Each element being decoded is described by a struct
|
|
* AsnDecodeSequenceItem, see above.
|
|
* startingPointer is an optional pointer to the first place where dynamic
|
|
* data will be stored. If you know the starting offset, you may pass it
|
|
* here. Otherwise, pass NULL, and one will be inferred from the items.
|
|
*/
|
|
static BOOL CRYPT_AsnDecodeSequence(DWORD dwCertEncodingType,
|
|
struct AsnDecodeSequenceItem items[], DWORD cItem, const BYTE *pbEncoded,
|
|
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
|
|
void *startingPointer)
|
|
{
|
|
BOOL ret;
|
|
|
|
TRACE("%p, %d, %p, %d, %08x, %p, %d, %p\n", items, cItem, pbEncoded,
|
|
cbEncoded, dwFlags, pvStructInfo, *pcbStructInfo, startingPointer);
|
|
|
|
if (pbEncoded[0] == ASN_SEQUENCE)
|
|
{
|
|
DWORD dataLen;
|
|
|
|
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
|
|
{
|
|
DWORD lenBytes = GET_LEN_BYTES(pbEncoded[1]), cbDecoded;
|
|
const BYTE *ptr = pbEncoded + 1 + lenBytes;
|
|
|
|
cbEncoded -= 1 + lenBytes;
|
|
if (cbEncoded < dataLen)
|
|
{
|
|
TRACE("dataLen %d exceeds cbEncoded %d, failing\n", dataLen,
|
|
cbEncoded);
|
|
SetLastError(CRYPT_E_ASN1_CORRUPT);
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
ret = CRYPT_AsnDecodeSequenceItems(dwFlags, items, cItem, ptr,
|
|
cbEncoded, dwFlags, NULL, NULL, &cbDecoded);
|
|
if (ret && cbDecoded != dataLen)
|
|
{
|
|
TRACE("expected %d decoded, got %d, failing\n", dataLen,
|
|
cbDecoded);
|
|
SetLastError(CRYPT_E_ASN1_CORRUPT);
|
|
ret = FALSE;
|
|
}
|
|
if (ret)
|
|
{
|
|
DWORD i, bytesNeeded = 0, structSize = 0;
|
|
|
|
for (i = 0; i < cItem; i++)
|
|
{
|
|
bytesNeeded += items[i].size;
|
|
structSize += items[i].minSize;
|
|
}
|
|
if (!pvStructInfo)
|
|
*pcbStructInfo = bytesNeeded;
|
|
else if (*pcbStructInfo < bytesNeeded)
|
|
{
|
|
SetLastError(ERROR_MORE_DATA);
|
|
*pcbStructInfo = bytesNeeded;
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
{
|
|
BYTE *nextData;
|
|
|
|
*pcbStructInfo = bytesNeeded;
|
|
if (startingPointer)
|
|
nextData = (BYTE *)startingPointer;
|
|
else
|
|
nextData = (BYTE *)pvStructInfo + structSize;
|
|
memset(pvStructInfo, 0, structSize);
|
|
ret = CRYPT_AsnDecodeSequenceItems(dwFlags, items, cItem,
|
|
ptr, cbEncoded, dwFlags, pvStructInfo, nextData,
|
|
&cbDecoded);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
SetLastError(CRYPT_E_ASN1_BADTAG);
|
|
ret = FALSE;
|
|
}
|
|
TRACE("returning %d (%08x)\n", ret, GetLastError());
|
|
return ret;
|
|
}
|
|
|
|
static BOOL WINAPI CRYPT_AsnDecodeBitsInternal(DWORD dwCertEncodingType,
|
|
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
|
|
void *pvStructInfo, DWORD *pcbStructInfo)
|
|
{
|
|
BOOL ret;
|
|
|
|
TRACE("(%p, %d, 0x%08x, %p, %d)\n", pbEncoded, cbEncoded, dwFlags,
|
|
pvStructInfo, *pcbStructInfo);
|
|
|
|
if (pbEncoded[0] == ASN_BITSTRING)
|
|
{
|
|
DWORD bytesNeeded, dataLen;
|
|
|
|
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
|
|
{
|
|
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
|
|
bytesNeeded = sizeof(CRYPT_BIT_BLOB);
|
|
else
|
|
bytesNeeded = dataLen - 1 + sizeof(CRYPT_BIT_BLOB);
|
|
if (!pvStructInfo)
|
|
*pcbStructInfo = bytesNeeded;
|
|
else if (*pcbStructInfo < bytesNeeded)
|
|
{
|
|
*pcbStructInfo = bytesNeeded;
|
|
SetLastError(ERROR_MORE_DATA);
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
{
|
|
CRYPT_BIT_BLOB *blob;
|
|
|
|
blob = (CRYPT_BIT_BLOB *)pvStructInfo;
|
|
blob->cbData = dataLen - 1;
|
|
blob->cUnusedBits = *(pbEncoded + 1 +
|
|
GET_LEN_BYTES(pbEncoded[1]));
|
|
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
|
|
{
|
|
blob->pbData = (BYTE *)pbEncoded + 2 +
|
|
GET_LEN_BYTES(pbEncoded[1]);
|
|
}
|
|
else
|
|
{
|
|
assert(blob->pbData);
|
|
if (blob->cbData)
|
|
{
|
|
BYTE mask = 0xff << blob->cUnusedBits;
|
|
|
|
memcpy(blob->pbData, pbEncoded + 2 +
|
|
GET_LEN_BYTES(pbEncoded[1]), blob->cbData);
|
|
blob->pbData[blob->cbData - 1] &= mask;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
SetLastError(CRYPT_E_ASN1_BADTAG);
|
|
ret = FALSE;
|
|
}
|
|
TRACE("returning %d (%08x)\n", ret, GetLastError());
|
|
return ret;
|
|
}
|
|
|
|
static BOOL WINAPI CRYPT_AsnDecodeSPCLinkPointer(DWORD dwCertEncodingType,
|
|
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
|
|
void *pvStructInfo, DWORD *pcbStructInfo)
|
|
{
|
|
BOOL ret = FALSE;
|
|
DWORD dataLen;
|
|
|
|
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
|
|
{
|
|
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
|
|
DWORD size;
|
|
SPC_LINK **pLink = (SPC_LINK **)pvStructInfo;
|
|
|
|
ret = CRYPT_AsnDecodeSPCLinkInternal(dwCertEncodingType, lpszStructType,
|
|
pbEncoded + 1 + lenBytes, dataLen, dwFlags, NULL, &size);
|
|
if (ret)
|
|
{
|
|
if (!pvStructInfo)
|
|
*pcbStructInfo = size + sizeof(PSPC_LINK);
|
|
else if (*pcbStructInfo < size + sizeof(PSPC_LINK))
|
|
{
|
|
*pcbStructInfo = size + sizeof(PSPC_LINK);
|
|
SetLastError(ERROR_MORE_DATA);
|
|
ret = FALSE;
|
|
}
|
|
else
|
|
{
|
|
*pcbStructInfo = size + sizeof(PSPC_LINK);
|
|
/* Set imageData's pointer if necessary */
|
|
if (size > sizeof(SPC_LINK))
|
|
{
|
|
(*pLink)->u.pwszUrl =
|
|
(LPWSTR)((BYTE *)*pLink + sizeof(SPC_LINK));
|
|
}
|
|
ret = CRYPT_AsnDecodeSPCLinkInternal(dwCertEncodingType,
|
|
lpszStructType, pbEncoded + 1 + lenBytes, dataLen, dwFlags,
|
|
*pLink, pcbStructInfo);
|
|
}
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
BOOL WINAPI WVTAsn1SpcPeImageDataDecode(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_BITSTRING, offsetof(SPC_PE_IMAGE_DATA, Flags),
|
|
CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
|
|
offsetof(SPC_PE_IMAGE_DATA, Flags.pbData), 0 },
|
|
{ ASN_CONSTRUCTOR | ASN_CONTEXT, offsetof(SPC_PE_IMAGE_DATA, pFile),
|
|
CRYPT_AsnDecodeSPCLinkPointer, sizeof(PSPC_LINK), TRUE, TRUE,
|
|
offsetof(SPC_PE_IMAGE_DATA, pFile), 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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
BOOL WINAPI WVTAsn1SpcSpOpusInfoDecode(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,
|
|
pvStructInfo, *pcbStructInfo);
|
|
return FALSE;
|
|
}
|