627 lines
20 KiB
C
627 lines
20 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 <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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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 = lstrlenW(link->u.pwszFile) * sizeof(WCHAR);
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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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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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FIXME("(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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return FALSE;
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}
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/* Gets the number of length bytes from the given (leading) length byte */
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#define GET_LEN_BYTES(b) ((b) <= 0x7f ? 1 : 1 + ((b) & 0x7f))
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/* Helper function to get the encoded length of the data starting at pbEncoded,
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* where pbEncoded[0] is the tag. If the data are too short to contain a
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* length or if the length is too large for cbEncoded, sets an appropriate
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* error code and returns FALSE.
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*/
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static BOOL CRYPT_GetLen(const BYTE *pbEncoded, DWORD cbEncoded, DWORD *len)
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{
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BOOL ret;
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if (cbEncoded <= 1)
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{
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SetLastError(CRYPT_E_ASN1_CORRUPT);
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ret = FALSE;
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}
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else if (pbEncoded[1] <= 0x7f)
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{
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if (pbEncoded[1] + 1 > cbEncoded)
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{
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SetLastError(CRYPT_E_ASN1_EOD);
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ret = FALSE;
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}
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else
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{
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*len = pbEncoded[1];
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ret = TRUE;
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}
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}
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else if (pbEncoded[1] == 0x80)
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{
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FIXME("unimplemented for indefinite-length encoding\n");
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SetLastError(CRYPT_E_ASN1_CORRUPT);
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ret = FALSE;
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}
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else
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{
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BYTE lenLen = GET_LEN_BYTES(pbEncoded[1]);
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if (lenLen > sizeof(DWORD) + 1)
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{
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SetLastError(CRYPT_E_ASN1_LARGE);
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ret = FALSE;
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}
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else if (lenLen + 2 > cbEncoded)
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{
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SetLastError(CRYPT_E_ASN1_CORRUPT);
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ret = FALSE;
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}
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else
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{
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DWORD out = 0;
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pbEncoded += 2;
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while (--lenLen)
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{
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out <<= 8;
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out |= *pbEncoded++;
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}
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if (out + lenLen + 1 > cbEncoded)
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{
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SetLastError(CRYPT_E_ASN1_EOD);
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ret = FALSE;
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}
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else
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{
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*len = out;
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ret = TRUE;
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}
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}
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}
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return ret;
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}
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static BOOL WINAPI CRYPT_AsnDecodeOctets(DWORD dwCertEncodingType,
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LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
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void *pvStructInfo, DWORD *pcbStructInfo)
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{
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BOOL ret;
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DWORD bytesNeeded, dataLen;
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TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
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pvStructInfo, *pcbStructInfo);
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if (!cbEncoded)
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{
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SetLastError(CRYPT_E_ASN1_CORRUPT);
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ret = FALSE;
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}
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else if (pbEncoded[0] != ASN_OCTETSTRING)
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{
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SetLastError(CRYPT_E_ASN1_BADTAG);
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ret = FALSE;
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}
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else if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
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{
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if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
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bytesNeeded = sizeof(CRYPT_DATA_BLOB);
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else
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bytesNeeded = dataLen + sizeof(CRYPT_DATA_BLOB);
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if (!pvStructInfo)
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*pcbStructInfo = bytesNeeded;
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else if (*pcbStructInfo < bytesNeeded)
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{
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SetLastError(ERROR_MORE_DATA);
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*pcbStructInfo = bytesNeeded;
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ret = FALSE;
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}
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else
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{
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CRYPT_DATA_BLOB *blob;
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BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
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blob = (CRYPT_DATA_BLOB *)pvStructInfo;
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blob->cbData = dataLen;
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if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
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blob->pbData = (BYTE *)pbEncoded + 1 + lenBytes;
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else
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{
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assert(blob->pbData);
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if (blob->cbData)
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memcpy(blob->pbData, pbEncoded + 1 + lenBytes,
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blob->cbData);
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}
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}
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}
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return ret;
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}
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static BOOL WINAPI CRYPT_AsnDecodeSPCLinkInternal(DWORD dwCertEncodingType,
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LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
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void *pvStructInfo, DWORD *pcbStructInfo)
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{
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BOOL ret = FALSE;
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DWORD bytesNeeded = sizeof(SPC_LINK), dataLen;
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TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
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pvStructInfo, *pcbStructInfo);
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if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
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{
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BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
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DWORD realDataLen;
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switch (pbEncoded[0])
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{
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case ASN_CONTEXT:
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bytesNeeded += (dataLen + 1) * sizeof(WCHAR);
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if (!pvStructInfo)
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*pcbStructInfo = bytesNeeded;
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else if (*pcbStructInfo < bytesNeeded)
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{
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*pcbStructInfo = 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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PSPC_LINK link = (PSPC_LINK)pvStructInfo;
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DWORD i;
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link->dwLinkChoice = SPC_URL_LINK_CHOICE;
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for (i = 0; i < dataLen; i++)
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link->u.pwszUrl[i] =
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*(pbEncoded + 1 + lenBytes + i);
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link->u.pwszUrl[i] = '\0';
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TRACE("returning url %s\n", debugstr_w(link->u.pwszUrl));
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}
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break;
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case ASN_CONSTRUCTOR | ASN_CONTEXT | 1:
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{
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CRYPT_DATA_BLOB classId;
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DWORD size = sizeof(classId);
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if ((ret = CRYPT_AsnDecodeOctets(dwCertEncodingType, NULL,
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pbEncoded + 1 + lenBytes, cbEncoded - 1 - lenBytes,
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CRYPT_DECODE_NOCOPY_FLAG, &classId, &size)))
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{
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if (classId.cbData != sizeof(SPC_UUID))
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{
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SetLastError(CRYPT_E_BAD_ENCODE);
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ret = FALSE;
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}
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else
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{
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CRYPT_DATA_BLOB data;
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/* The tag length for the classId must be 1 since the
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* length is correct.
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*/
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size = sizeof(data);
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if ((ret = CRYPT_AsnDecodeOctets(dwCertEncodingType, NULL,
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pbEncoded + 3 + lenBytes + classId.cbData,
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cbEncoded - 3 - lenBytes - classId.cbData,
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CRYPT_DECODE_NOCOPY_FLAG, &data, &size)))
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{
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bytesNeeded += data.cbData;
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if (!pvStructInfo)
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*pcbStructInfo = bytesNeeded;
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else if (*pcbStructInfo < bytesNeeded)
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{
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*pcbStructInfo = 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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PSPC_LINK link = (PSPC_LINK)pvStructInfo;
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link->dwLinkChoice = SPC_MONIKER_LINK_CHOICE;
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/* pwszFile pointer was set by caller, copy it
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* before overwriting it
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*/
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link->u.Moniker.SerializedData.pbData =
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(BYTE *)link->u.pwszFile;
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memcpy(&link->u.Moniker.ClassId, classId.pbData,
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classId.cbData);
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memcpy(link->u.Moniker.SerializedData.pbData,
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data.pbData, data.cbData);
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link->u.Moniker.SerializedData.cbData = data.cbData;
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}
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}
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}
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}
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break;
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}
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case ASN_CONSTRUCTOR | ASN_CONTEXT | 2:
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if (dataLen && pbEncoded[1 + lenBytes] != ASN_CONTEXT)
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SetLastError(CRYPT_E_ASN1_BADTAG);
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else if ((ret = CRYPT_GetLen(pbEncoded + 1 + lenBytes, dataLen,
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&realDataLen)))
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{
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BYTE realLenBytes = GET_LEN_BYTES(pbEncoded[2 + lenBytes]);
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bytesNeeded += realDataLen + sizeof(WCHAR);
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if (!pvStructInfo)
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*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;
|
|
}
|
|
|
|
BOOL WINAPI WVTAsn1SpcPeImageDataDecode(DWORD dwCertEncodingType,
|
|
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
|
|
void *pvStructInfo, DWORD *pcbStructInfo)
|
|
{
|
|
FIXME("(0x%08x, %s, %p, %d, 0x%08x, %p, %p)\n", dwCertEncodingType,
|
|
debugstr_a(lpszStructType), pbEncoded, cbEncoded, dwFlags,
|
|
pvStructInfo, pcbStructInfo);
|
|
return FALSE;
|
|
}
|