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/*
* Copyright 2005-2008 Juan Lang
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* This file implements ASN.1 DER decoding of a limited set of types.
* It isn't a full ASN.1 implementation. Microsoft implements BER
* encoding of many of the basic types in msasn1.dll, but that interface isn't
* implemented, so I implement them here.
*
* References:
* "A Layman's Guide to a Subset of ASN.1, BER, and DER", by Burton Kaliski
* (available online, look for a PDF copy as the HTML versions tend to have
* translation errors.)
*
* RFC3280, http://www.faqs.org/rfcs/rfc3280.html
*
* MSDN, especially "Constants for CryptEncodeObject and CryptDecodeObject"
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#define NONAMELESSUNION
#include "windef.h"
#include "winbase.h"
#include "wincrypt.h"
#include "winnls.h"
#include "snmp.h"
#include "wine/debug.h"
#include "wine/exception.h"
#include "crypt32_private.h"
/* This is a bit arbitrary, but to set some limit: */
#define MAX_ENCODED_LEN 0x02000000
#define ASN_FLAGS_MASK 0xe0
#define ASN_TYPE_MASK 0x1f
WINE_DEFAULT_DEBUG_CHANNEL(cryptasn);
WINE_DECLARE_DEBUG_CHANNEL(crypt);
struct GenericArray
{
DWORD cItems;
BYTE *rgItems;
};
typedef BOOL (WINAPI *CryptDecodeObjectFunc)(DWORD, LPCSTR, const BYTE *,
DWORD, DWORD, void *, DWORD *);
typedef BOOL (WINAPI *CryptDecodeObjectExFunc)(DWORD, LPCSTR, const BYTE *,
DWORD, DWORD, PCRYPT_DECODE_PARA, void *, DWORD *);
/* Internal decoders don't do memory allocation or exception handling, and
* they report how many bytes they decoded.
*/
typedef BOOL (*InternalDecodeFunc)(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded);
static BOOL CRYPT_AsnDecodeChoiceOfTimeInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded);
static BOOL CRYPT_AsnDecodePubKeyInfoInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded);
/* Like CRYPT_AsnDecodeExtensions, except assumes rgExtension is set ahead of
* time, doesn't do memory allocation, and doesn't do exception handling.
*/
static BOOL CRYPT_AsnDecodeExtensionsInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded);
/* Assumes algo->Parameters.pbData is set ahead of time. */
static BOOL CRYPT_AsnDecodeAlgorithmId(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded);
static BOOL CRYPT_AsnDecodeBool(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded);
/* Assumes the CRYPT_DATA_BLOB's pbData member has been initialized */
static BOOL CRYPT_AsnDecodeOctetsInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded);
static BOOL CRYPT_AsnDecodeBitsInternal(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded);
static BOOL CRYPT_AsnDecodeIntInternal(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded);
/* Like CRYPT_AsnDecodeInteger, but assumes the CRYPT_INTEGER_BLOB's pbData
* member has been initialized, doesn't do exception handling, and doesn't do
* memory allocation. Also doesn't check tag, assumes the caller has checked
* it.
*/
static BOOL CRYPT_AsnDecodeIntegerInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded);
/* Like CRYPT_AsnDecodeInteger, but unsigned. */
static BOOL CRYPT_AsnDecodeUnsignedIntegerInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded);
static BOOL CRYPT_AsnDecodePKCSAttributesInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded);
/* Gets the number of length bytes from the given (leading) length byte */
#define GET_LEN_BYTES(b) ((b) <= 0x80 ? 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. If the encoded length is unknown due to
* indefinite length encoding, *len is set to CMSG_INDEFINITE_LENGTH.
*/
static BOOL CRYPT_GetLengthIndefinite(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)
{
*len = CMSG_INDEFINITE_LENGTH;
ret = TRUE;
}
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;
}
/* Like CRYPT_GetLengthIndefinite, but disallows indefinite-length encoding. */
static BOOL CRYPT_GetLen(const BYTE *pbEncoded, DWORD cbEncoded, DWORD *len)
{
BOOL ret;
if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded, len)) &&
*len == CMSG_INDEFINITE_LENGTH)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
return ret;
}
/* Helper function to check *pcbStructInfo, set it to the required size, and
* optionally to allocate memory. Assumes pvStructInfo is not NULL.
* If CRYPT_DECODE_ALLOC_FLAG is set in dwFlags, *pvStructInfo will be set to a
* pointer to the newly allocated memory.
*/
static BOOL CRYPT_DecodeEnsureSpace(DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD bytesNeeded)
{
BOOL ret = TRUE;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
{
if (pDecodePara && pDecodePara->pfnAlloc)
*(BYTE **)pvStructInfo = pDecodePara->pfnAlloc(bytesNeeded);
else
*(BYTE **)pvStructInfo = LocalAlloc(0, bytesNeeded);
if (!*(BYTE **)pvStructInfo)
ret = FALSE;
else
*pcbStructInfo = bytesNeeded;
}
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
*pcbStructInfo = bytesNeeded;
return ret;
}
static void CRYPT_FreeSpace(PCRYPT_DECODE_PARA pDecodePara, LPVOID pv)
{
if (pDecodePara && pDecodePara->pfnFree)
pDecodePara->pfnFree(pv);
else
LocalFree(pv);
}
/* Helper function to check *pcbStructInfo and set it to the required size.
* Assumes pvStructInfo is not NULL.
*/
static BOOL CRYPT_DecodeCheckSpace(DWORD *pcbStructInfo, DWORD bytesNeeded)
{
BOOL ret;
if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pcbStructInfo = bytesNeeded;
ret = TRUE;
}
return ret;
}
/* 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;
InternalDecodeFunc 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.
* Each item decoder is never called with CRYPT_DECODE_ALLOC_FLAG set.
*/
static BOOL CRYPT_AsnDecodeSequenceItems(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 itemLen;
if ((ret = CRYPT_GetLengthIndefinite(ptr,
cbEncoded - (ptr - pbEncoded), &itemLen)))
{
BYTE itemLenBytes = GET_LEN_BYTES(ptr[1]);
if (ptr[0] == items[i].tag || !items[i].tag)
{
DWORD itemEncodedLen;
if (itemLen == CMSG_INDEFINITE_LENGTH)
itemEncodedLen = cbEncoded - (ptr - pbEncoded);
else
itemEncodedLen = 1 + itemLenBytes + itemLen;
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)
{
DWORD itemDecoded;
if (pvStructInfo)
TRACE("decoding item %d\n", i);
else
TRACE("sizing item %d\n", i);
ret = items[i].decodeFunc(ptr, itemEncodedLen,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG,
pvStructInfo ? (BYTE *)pvStructInfo + items[i].offset
: NULL, &items[i].size, &itemDecoded);
if (ret)
{
/* Account for alignment padding */
if (items[i].size % sizeof(DWORD_PTR))
items[i].size += sizeof(DWORD_PTR) -
items[i].size % sizeof(DWORD_PTR);
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;
if (itemDecoded > itemEncodedLen)
{
WARN("decoded length %d exceeds encoded %d\n",
itemDecoded, itemEncodedLen);
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
{
if (itemLen == CMSG_INDEFINITE_LENGTH)
{
if (itemDecoded > itemEncodedLen - 2 ||
*(ptr + itemDecoded) != 0 ||
*(ptr + itemDecoded + 1) != 0)
{
TRACE("expected 0 TLV\n");
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
itemDecoded += 2;
}
if (ret)
{
ptr += itemDecoded;
decoded += itemDecoded;
TRACE("item %d: decoded %d bytes\n", i,
itemDecoded);
}
}
}
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 if (itemLen == CMSG_INDEFINITE_LENGTH)
{
ERR("can't use indefinite length encoding without a decoder\n");
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
{
TRACE("item %d: decoded %d bytes\n", i, itemEncodedLen);
ptr += itemEncodedLen;
decoded += itemEncodedLen;
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 (cbDecoded)
*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(struct AsnDecodeSequenceItem items[],
DWORD cItem, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded, void *startingPointer)
{
BOOL ret;
TRACE("%p, %d, %p, %d, %08x, %p, %p, %d, %p\n", items, cItem, pbEncoded,
cbEncoded, dwFlags, pDecodePara, pvStructInfo, *pcbStructInfo,
startingPointer);
if (pbEncoded[0] == ASN_SEQUENCE)
{
DWORD dataLen;
if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded, &dataLen)))
{
DWORD lenBytes = GET_LEN_BYTES(pbEncoded[1]), cbDecoded;
const BYTE *ptr = pbEncoded + 1 + lenBytes;
BOOL indefinite = FALSE;
cbEncoded -= 1 + lenBytes;
if (dataLen == CMSG_INDEFINITE_LENGTH)
{
dataLen = cbEncoded;
indefinite = TRUE;
}
else if (cbEncoded < dataLen)
{
TRACE("dataLen %d exceeds cbEncoded %d, failing\n", dataLen,
cbEncoded);
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
if (ret)
{
ret = CRYPT_AsnDecodeSequenceItems(items, cItem,
ptr, dataLen, dwFlags, NULL, NULL, &cbDecoded);
if (ret && dataLen == CMSG_INDEFINITE_LENGTH)
{
if (cbDecoded > cbEncoded - 2)
{
/* Not enough space for 0 TLV */
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else if (*(ptr + cbDecoded) != 0 ||
*(ptr + cbDecoded + 1) != 0)
{
TRACE("expected 0 TLV\n");
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
cbDecoded += 2;
}
}
if (ret && !indefinite && 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 (pcbDecoded)
*pcbDecoded = 1 + lenBytes + cbDecoded;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, bytesNeeded)))
{
BYTE *nextData;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
if (startingPointer)
nextData = (BYTE *)startingPointer;
else
nextData = (BYTE *)pvStructInfo + structSize;
memset(pvStructInfo, 0, structSize);
ret = CRYPT_AsnDecodeSequenceItems(items, cItem,
ptr, dataLen, dwFlags, pvStructInfo, nextData,
&cbDecoded);
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, pvStructInfo);
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
TRACE("returning %d (%08x)\n", ret, GetLastError());
return ret;
}
/* tag:
* The expected tag of the entire encoded array (usually a variant
* of ASN_SETOF or ASN_SEQUENCEOF.) If tag is 0, decodeFunc is called
* regardless of the tag seen.
* decodeFunc:
* used to decode each item in the array
* itemSize:
* is the minimum size of each decoded item
* hasPointer:
* indicates whether each item has a dynamic pointer
* pointerOffset:
* indicates the offset within itemSize at which the pointer exists
*/
struct AsnArrayDescriptor
{
BYTE tag;
InternalDecodeFunc decodeFunc;
DWORD itemSize;
BOOL hasPointer;
DWORD pointerOffset;
};
struct AsnArrayItemSize
{
DWORD encodedLen;
DWORD size;
};
/* Decodes an array of like types into a struct GenericArray.
* The layout and decoding of the array are described by a struct
* AsnArrayDescriptor.
*/
static BOOL CRYPT_AsnDecodeArray(const struct AsnArrayDescriptor *arrayDesc,
const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded, void *startingPointer)
{
BOOL ret = TRUE;
TRACE("%p, %p, %d, %08x, %p, %p, %d, %p\n", arrayDesc, pbEncoded,
cbEncoded, dwFlags, pDecodePara, pvStructInfo, *pcbStructInfo,
startingPointer);
if (!arrayDesc->tag || pbEncoded[0] == arrayDesc->tag)
{
DWORD dataLen;
if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded, &dataLen)))
{
DWORD bytesNeeded, cItems = 0, decoded;
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
/* There can be arbitrarily many items, but there is often only one.
*/
struct AsnArrayItemSize itemSize = { 0 }, *itemSizes = &itemSize;
decoded = 1 + lenBytes;
bytesNeeded = sizeof(struct GenericArray);
if (dataLen)
{
const BYTE *ptr;
BOOL doneDecoding = FALSE;
for (ptr = pbEncoded + 1 + lenBytes; ret && !doneDecoding; )
{
if (dataLen == CMSG_INDEFINITE_LENGTH)
{
if (ptr[0] == 0)
{
doneDecoding = TRUE;
if (ptr[1] != 0)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
decoded += 2;
}
}
else if (ptr - pbEncoded - 1 - lenBytes >= dataLen)
doneDecoding = TRUE;
if (!doneDecoding)
{
DWORD itemEncoded, itemDataLen, itemDecoded, size = 0;
/* Each item decoded may not tolerate extraneous bytes,
* so get the length of the next element if known.
*/
if ((ret = CRYPT_GetLengthIndefinite(ptr,
cbEncoded - (ptr - pbEncoded), &itemDataLen)))
{
if (itemDataLen == CMSG_INDEFINITE_LENGTH)
itemEncoded = cbEncoded - (ptr - pbEncoded);
else
itemEncoded = 1 + GET_LEN_BYTES(ptr[1]) +
itemDataLen;
}
if (ret)
ret = arrayDesc->decodeFunc(ptr, itemEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &size,
&itemDecoded);
if (ret)
{
cItems++;
if (itemSizes != &itemSize)
itemSizes = CryptMemRealloc(itemSizes,
cItems * sizeof(struct AsnArrayItemSize));
else if (cItems > 1)
{
itemSizes =
CryptMemAlloc(
cItems * sizeof(struct AsnArrayItemSize));
if (itemSizes)
memcpy(itemSizes, &itemSize,
sizeof(itemSize));
}
if (itemSizes)
{
decoded += itemDecoded;
itemSizes[cItems - 1].encodedLen = itemEncoded;
itemSizes[cItems - 1].size = size;
bytesNeeded += size;
ptr += itemEncoded;
}
else
ret = FALSE;
}
}
}
}
if (ret)
{
if (pcbDecoded)
*pcbDecoded = decoded;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, bytesNeeded)))
{
DWORD i;
BYTE *nextData;
const BYTE *ptr;
struct GenericArray *array;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
array = (struct GenericArray *)pvStructInfo;
array->cItems = cItems;
if (startingPointer)
array->rgItems = startingPointer;
else
array->rgItems = (BYTE *)array +
sizeof(struct GenericArray);
nextData = array->rgItems +
array->cItems * arrayDesc->itemSize;
for (i = 0, ptr = pbEncoded + 1 + lenBytes; ret &&
i < cItems && ptr - pbEncoded - 1 - lenBytes <
dataLen; i++)
{
DWORD itemDecoded;
if (arrayDesc->hasPointer)
*(BYTE **)(array->rgItems + i * arrayDesc->itemSize
+ arrayDesc->pointerOffset) = nextData;
ret = arrayDesc->decodeFunc(ptr,
itemSizes[i].encodedLen,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG,
array->rgItems + i * arrayDesc->itemSize,
&itemSizes[i].size, &itemDecoded);
if (ret)
{
nextData += itemSizes[i].size - arrayDesc->itemSize;
ptr += itemDecoded;
}
}
if (!ret && (dwFlags & CRYPT_DECODE_ALLOC_FLAG))
CRYPT_FreeSpace(pDecodePara, pvStructInfo);
}
}
if (itemSizes != &itemSize)
CryptMemFree(itemSizes);
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
return ret;
}
/* Decodes a DER-encoded BLOB into a CRYPT_DER_BLOB struct pointed to by
* pvStructInfo. The BLOB must be non-empty, otherwise the last error is set
* to CRYPT_E_ASN1_CORRUPT.
* Warning: assumes the CRYPT_DER_BLOB pointed to by pvStructInfo has pbData
* set!
*/
static BOOL CRYPT_AsnDecodeDerBlob(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD bytesNeeded = sizeof(CRYPT_DER_BLOB);
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += 1 + lenBytes + dataLen;
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeCheckSpace(pcbStructInfo, bytesNeeded)))
{
CRYPT_DER_BLOB *blob;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
blob = (CRYPT_DER_BLOB *)pvStructInfo;
blob->cbData = 1 + lenBytes + dataLen;
if (blob->cbData)
{
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
blob->pbData = (BYTE *)pbEncoded;
else
{
assert(blob->pbData);
memcpy(blob->pbData, pbEncoded, blob->cbData);
}
}
else
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
}
}
return ret;
}
/* Like CRYPT_AsnDecodeBitsInternal, but swaps the bytes */
static BOOL CRYPT_AsnDecodeBitsSwapBytes(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
TRACE("(%p, %d, 0x%08x, %p, %d, %p)\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
/* Can't use the CRYPT_DECODE_NOCOPY_FLAG, because we modify the bytes in-
* place.
*/
ret = CRYPT_AsnDecodeBitsInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_NOCOPY_FLAG, pvStructInfo, pcbStructInfo,
pcbDecoded);
if (ret && pvStructInfo)
{
CRYPT_BIT_BLOB *blob = (CRYPT_BIT_BLOB *)pvStructInfo;
if (blob->cbData)
{
DWORD i;
BYTE temp;
for (i = 0; i < blob->cbData / 2; i++)
{
temp = blob->pbData[i];
blob->pbData[i] = blob->pbData[blob->cbData - i - 1];
blob->pbData[blob->cbData - i - 1] = temp;
}
}
}
TRACE("returning %d (%08x)\n", ret, GetLastError());
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCertSignedContent(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ 0, offsetof(CERT_SIGNED_CONTENT_INFO, ToBeSigned),
CRYPT_AsnDecodeDerBlob, sizeof(CRYPT_DER_BLOB), FALSE, TRUE,
offsetof(CERT_SIGNED_CONTENT_INFO, ToBeSigned.pbData), 0 },
{ ASN_SEQUENCEOF, offsetof(CERT_SIGNED_CONTENT_INFO,
SignatureAlgorithm), CRYPT_AsnDecodeAlgorithmId,
sizeof(CRYPT_ALGORITHM_IDENTIFIER), FALSE, TRUE,
offsetof(CERT_SIGNED_CONTENT_INFO, SignatureAlgorithm.pszObjId), 0 },
{ ASN_BITSTRING, offsetof(CERT_SIGNED_CONTENT_INFO, Signature),
CRYPT_AsnDecodeBitsSwapBytes, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
offsetof(CERT_SIGNED_CONTENT_INFO, Signature.pbData), 0 },
};
if (dwFlags & CRYPT_DECODE_NO_SIGNATURE_BYTE_REVERSAL_FLAG)
items[2].decodeFunc = CRYPT_AsnDecodeBitsInternal;
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
TRACE("Returning %d (%08x)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeCertVersion(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
ret = CRYPT_AsnDecodeIntInternal(pbEncoded + 1 + lenBytes, dataLen,
dwFlags, pvStructInfo, pcbStructInfo, NULL);
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
}
return ret;
}
static BOOL CRYPT_AsnDecodeValidity(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ 0, offsetof(CERT_PRIVATE_KEY_VALIDITY, NotBefore),
CRYPT_AsnDecodeChoiceOfTimeInternal, sizeof(FILETIME), FALSE, FALSE, 0 },
{ 0, offsetof(CERT_PRIVATE_KEY_VALIDITY, NotAfter),
CRYPT_AsnDecodeChoiceOfTimeInternal, sizeof(FILETIME), FALSE, FALSE, 0 },
};
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, NULL);
return ret;
}
static BOOL CRYPT_AsnDecodeCertExtensions(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
ret = CRYPT_AsnDecodeExtensionsInternal(pbEncoded + 1 + lenBytes,
dataLen, dwFlags, pvStructInfo, pcbStructInfo, NULL);
if (ret && pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCertInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
struct AsnDecodeSequenceItem items[] = {
{ ASN_CONTEXT | ASN_CONSTRUCTOR, offsetof(CERT_INFO, dwVersion),
CRYPT_AsnDecodeCertVersion, sizeof(DWORD), TRUE, FALSE, 0, 0 },
{ ASN_INTEGER, offsetof(CERT_INFO, SerialNumber),
CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB), FALSE,
TRUE, offsetof(CERT_INFO, SerialNumber.pbData), 0 },
{ ASN_SEQUENCEOF, offsetof(CERT_INFO, SignatureAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CERT_INFO, SignatureAlgorithm.pszObjId), 0 },
{ 0, offsetof(CERT_INFO, Issuer), CRYPT_AsnDecodeDerBlob,
sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CERT_INFO,
Issuer.pbData) },
{ ASN_SEQUENCEOF, offsetof(CERT_INFO, NotBefore),
CRYPT_AsnDecodeValidity, sizeof(CERT_PRIVATE_KEY_VALIDITY), FALSE,
FALSE, 0 },
{ 0, offsetof(CERT_INFO, Subject), CRYPT_AsnDecodeDerBlob,
sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CERT_INFO,
Subject.pbData) },
{ ASN_SEQUENCEOF, offsetof(CERT_INFO, SubjectPublicKeyInfo),
CRYPT_AsnDecodePubKeyInfoInternal, sizeof(CERT_PUBLIC_KEY_INFO),
FALSE, TRUE, offsetof(CERT_INFO,
SubjectPublicKeyInfo.Algorithm.Parameters.pbData), 0 },
{ ASN_BITSTRING, offsetof(CERT_INFO, IssuerUniqueId),
CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
offsetof(CERT_INFO, IssuerUniqueId.pbData), 0 },
{ ASN_BITSTRING, offsetof(CERT_INFO, SubjectUniqueId),
CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
offsetof(CERT_INFO, SubjectUniqueId.pbData), 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 3, offsetof(CERT_INFO, cExtension),
CRYPT_AsnDecodeCertExtensions, sizeof(CERT_EXTENSIONS), TRUE, TRUE,
offsetof(CERT_INFO, rgExtension), 0 },
};
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo,
NULL, NULL);
if (ret && pvStructInfo)
{
CERT_INFO *info;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
info = *(CERT_INFO **)pvStructInfo;
else
info = (CERT_INFO *)pvStructInfo;
if (!info->SerialNumber.cbData || !info->Issuer.cbData ||
!info->Subject.cbData)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
/* Don't need to deallocate, because it should have failed on the
* first pass (and no memory was allocated.)
*/
ret = FALSE;
}
}
TRACE("Returning %d (%08x)\n", ret, GetLastError());
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCert(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
DWORD size = 0;
/* Unless told not to, first try to decode it as a signed cert. */
if (!(dwFlags & CRYPT_DECODE_TO_BE_SIGNED_FLAG))
{
PCERT_SIGNED_CONTENT_INFO signedCert = NULL;
ret = CRYPT_AsnDecodeCertSignedContent(dwCertEncodingType,
X509_CERT, pbEncoded, cbEncoded, CRYPT_DECODE_ALLOC_FLAG, NULL,
(BYTE *)&signedCert, &size);
if (ret)
{
size = 0;
ret = CRYPT_AsnDecodeCertInfo(dwCertEncodingType,
X509_CERT_TO_BE_SIGNED, signedCert->ToBeSigned.pbData,
signedCert->ToBeSigned.cbData, dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo);
LocalFree(signedCert);
}
}
/* Failing that, try it as an unsigned cert */
if (!ret)
{
size = 0;
ret = CRYPT_AsnDecodeCertInfo(dwCertEncodingType,
X509_CERT_TO_BE_SIGNED, pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo);
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("Returning %d (%08x)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeCRLEntry(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CRL_ENTRY, SerialNumber),
CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB), FALSE, TRUE,
offsetof(CRL_ENTRY, SerialNumber.pbData), 0 },
{ 0, offsetof(CRL_ENTRY, RevocationDate),
CRYPT_AsnDecodeChoiceOfTimeInternal, sizeof(FILETIME), FALSE, FALSE, 0 },
{ ASN_SEQUENCEOF, offsetof(CRL_ENTRY, cExtension),
CRYPT_AsnDecodeExtensionsInternal, sizeof(CERT_EXTENSIONS), TRUE, TRUE,
offsetof(CRL_ENTRY, rgExtension), 0 },
};
PCRL_ENTRY entry = (PCRL_ENTRY)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags, entry,
*pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, entry, pcbStructInfo, pcbDecoded,
entry ? entry->SerialNumber.pbData : NULL);
if (ret && entry && !entry->SerialNumber.cbData)
{
WARN("empty CRL entry serial number\n");
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
return ret;
}
/* Warning: assumes pvStructInfo is a struct GenericArray whose rgItems has
* been set prior to calling.
*/
static BOOL CRYPT_AsnDecodeCRLEntries(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
CRYPT_AsnDecodeCRLEntry, sizeof(CRL_ENTRY), TRUE,
offsetof(CRL_ENTRY, SerialNumber.pbData) };
struct GenericArray *entries = (struct GenericArray *)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
entries ? entries->rgItems : NULL);
TRACE("Returning %d (%08x)\n", ret, GetLastError());
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCRLInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CRL_INFO, dwVersion),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), TRUE, FALSE, 0, 0 },
{ ASN_SEQUENCEOF, offsetof(CRL_INFO, SignatureAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CRL_INFO, SignatureAlgorithm.pszObjId), 0 },
{ 0, offsetof(CRL_INFO, Issuer), CRYPT_AsnDecodeDerBlob,
sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CRL_INFO,
Issuer.pbData) },
{ 0, offsetof(CRL_INFO, ThisUpdate), CRYPT_AsnDecodeChoiceOfTimeInternal,
sizeof(FILETIME), FALSE, FALSE, 0 },
{ 0, offsetof(CRL_INFO, NextUpdate), CRYPT_AsnDecodeChoiceOfTimeInternal,
sizeof(FILETIME), TRUE, FALSE, 0 },
{ ASN_SEQUENCEOF, offsetof(CRL_INFO, cCRLEntry),
CRYPT_AsnDecodeCRLEntries, sizeof(struct GenericArray), TRUE, TRUE,
offsetof(CRL_INFO, rgCRLEntry), 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 0, offsetof(CRL_INFO, cExtension),
CRYPT_AsnDecodeCertExtensions, sizeof(CERT_EXTENSIONS), TRUE, TRUE,
offsetof(CRL_INFO, rgExtension), 0 },
};
BOOL ret = TRUE;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo,
NULL, NULL);
TRACE("Returning %d (%08x)\n", ret, GetLastError());
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCRL(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
DWORD size = 0;
/* Unless told not to, first try to decode it as a signed crl. */
if (!(dwFlags & CRYPT_DECODE_TO_BE_SIGNED_FLAG))
{
PCERT_SIGNED_CONTENT_INFO signedCrl = NULL;
ret = CRYPT_AsnDecodeCertSignedContent(dwCertEncodingType,
X509_CERT, pbEncoded, cbEncoded, CRYPT_DECODE_ALLOC_FLAG, NULL,
(BYTE *)&signedCrl, &size);
if (ret)
{
size = 0;
ret = CRYPT_AsnDecodeCRLInfo(dwCertEncodingType,
X509_CERT_CRL_TO_BE_SIGNED, signedCrl->ToBeSigned.pbData,
signedCrl->ToBeSigned.cbData, dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo);
LocalFree(signedCrl);
}
}
/* Failing that, try it as an unsigned crl */
if (!ret)
{
size = 0;
ret = CRYPT_AsnDecodeCRLInfo(dwCertEncodingType,
X509_CERT_CRL_TO_BE_SIGNED, pbEncoded, cbEncoded,
dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("Returning %d (%08x)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeOidIgnoreTag(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
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 (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
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 CRYPT_AsnDecodeOidInternal(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
if (pbEncoded[0] == ASN_OBJECTIDENTIFIER)
ret = CRYPT_AsnDecodeOidIgnoreTag(pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pcbStructInfo, pcbDecoded);
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
return ret;
}
/* Warning: assumes pvStructInfo is a CERT_EXTENSION whose pszObjId is set
* ahead of time!
*/
static BOOL CRYPT_AsnDecodeExtension(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CERT_EXTENSION, pszObjId),
CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
offsetof(CERT_EXTENSION, pszObjId), 0 },
{ ASN_BOOL, offsetof(CERT_EXTENSION, fCritical), CRYPT_AsnDecodeBool,
sizeof(BOOL), TRUE, FALSE, 0, 0 },
{ ASN_OCTETSTRING, offsetof(CERT_EXTENSION, Value),
CRYPT_AsnDecodeOctetsInternal, sizeof(CRYPT_OBJID_BLOB), FALSE, TRUE,
offsetof(CERT_EXTENSION, Value.pbData) },
};
BOOL ret = TRUE;
PCERT_EXTENSION ext = (PCERT_EXTENSION)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags, ext,
*pcbStructInfo);
if (ext)
TRACE("ext->pszObjId is %p\n", ext->pszObjId);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, ext, pcbStructInfo,
pcbDecoded, ext ? ext->pszObjId : NULL);
if (ext)
TRACE("ext->pszObjId is %p (%s)\n", ext->pszObjId,
debugstr_a(ext->pszObjId));
TRACE("returning %d (%08x)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeExtensionsInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
CRYPT_AsnDecodeExtension, sizeof(CERT_EXTENSION), TRUE,
offsetof(CERT_EXTENSION, pszObjId) };
PCERT_EXTENSIONS exts = (PCERT_EXTENSIONS)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
exts ? exts->rgExtension : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeExtensions(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
__TRY
{
ret = CRYPT_AsnDecodeExtensionsInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
if (ret && pvStructInfo)
{
ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, *pcbStructInfo);
if (ret)
{
CERT_EXTENSIONS *exts;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
exts = (CERT_EXTENSIONS *)pvStructInfo;
exts->rgExtension = (CERT_EXTENSION *)((BYTE *)exts +
sizeof(CERT_EXTENSIONS));
ret = CRYPT_AsnDecodeExtensionsInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
pcbStructInfo, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
/* Warning: this assumes the address of value->Value.pbData is already set, in
* order to avoid overwriting memory. (In some cases, it may change it, if it
* doesn't copy anything to memory.) Be sure to set it correctly!
*/
static BOOL CRYPT_AsnDecodeNameValueInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
DWORD dataLen;
CERT_NAME_VALUE *value = (CERT_NAME_VALUE *)pvStructInfo;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD bytesNeeded = sizeof(CERT_NAME_VALUE), valueType;
switch (pbEncoded[0])
{
case ASN_OCTETSTRING:
valueType = CERT_RDN_OCTET_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_NUMERICSTRING:
valueType = CERT_RDN_NUMERIC_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_PRINTABLESTRING:
valueType = CERT_RDN_PRINTABLE_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_IA5STRING:
valueType = CERT_RDN_IA5_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_T61STRING:
valueType = CERT_RDN_T61_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_VIDEOTEXSTRING:
valueType = CERT_RDN_VIDEOTEX_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_GRAPHICSTRING:
valueType = CERT_RDN_GRAPHIC_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_VISIBLESTRING:
valueType = CERT_RDN_VISIBLE_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_GENERALSTRING:
valueType = CERT_RDN_GENERAL_STRING;
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
case ASN_UNIVERSALSTRING:
FIXME("ASN_UNIVERSALSTRING: unimplemented\n");
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
case ASN_BMPSTRING:
valueType = CERT_RDN_BMP_STRING;
bytesNeeded += dataLen;
break;
case ASN_UTF8STRING:
valueType = CERT_RDN_UTF8_STRING;
bytesNeeded += MultiByteToWideChar(CP_UTF8, 0,
(LPCSTR)pbEncoded + 1 + lenBytes, dataLen, NULL, 0) * 2;
break;
default:
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!value)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pcbStructInfo = bytesNeeded;
value->dwValueType = valueType;
if (dataLen)
{
DWORD i;
assert(value->Value.pbData);
switch (pbEncoded[0])
{
case ASN_OCTETSTRING:
case ASN_NUMERICSTRING:
case ASN_PRINTABLESTRING:
case ASN_IA5STRING:
case ASN_T61STRING:
case ASN_VIDEOTEXSTRING:
case ASN_GRAPHICSTRING:
case ASN_VISIBLESTRING:
case ASN_GENERALSTRING:
value->Value.cbData = dataLen;
if (dataLen)
{
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
memcpy(value->Value.pbData,
pbEncoded + 1 + lenBytes, dataLen);
else
value->Value.pbData = (LPBYTE)pbEncoded + 1 +
lenBytes;
}
break;
case ASN_BMPSTRING:
{
LPWSTR str = (LPWSTR)value->Value.pbData;
value->Value.cbData = dataLen;
for (i = 0; i < dataLen / 2; i++)
str[i] = (pbEncoded[1 + lenBytes + 2 * i] << 8) |
pbEncoded[1 + lenBytes + 2 * i + 1];
break;
}
case ASN_UTF8STRING:
{
LPWSTR str = (LPWSTR)value->Value.pbData;
value->Value.cbData = MultiByteToWideChar(CP_UTF8, 0,
(LPCSTR)pbEncoded + 1 + lenBytes, dataLen,
str, bytesNeeded - sizeof(CERT_NAME_VALUE)) * 2;
break;
}
}
}
else
{
value->Value.cbData = 0;
value->Value.pbData = NULL;
}
}
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeNameValue(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
__TRY
{
ret = CRYPT_AsnDecodeNameValueInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
if (ret && pvStructInfo)
{
ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, *pcbStructInfo);
if (ret)
{
CERT_NAME_VALUE *value;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
value = (CERT_NAME_VALUE *)pvStructInfo;
value->Value.pbData = ((BYTE *)value + sizeof(CERT_NAME_VALUE));
ret = CRYPT_AsnDecodeNameValueInternal( pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
pcbStructInfo, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeUnicodeNameValueInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
DWORD dataLen;
CERT_NAME_VALUE *value = (CERT_NAME_VALUE *)pvStructInfo;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD bytesNeeded = sizeof(CERT_NAME_VALUE), valueType;
switch (pbEncoded[0])
{
case ASN_NUMERICSTRING:
valueType = CERT_RDN_NUMERIC_STRING;
bytesNeeded += dataLen * 2;
break;
case ASN_PRINTABLESTRING:
valueType = CERT_RDN_PRINTABLE_STRING;
bytesNeeded += dataLen * 2;
break;
case ASN_IA5STRING:
valueType = CERT_RDN_IA5_STRING;
bytesNeeded += dataLen * 2;
break;
case ASN_T61STRING:
valueType = CERT_RDN_T61_STRING;
bytesNeeded += dataLen * 2;
break;
case ASN_VIDEOTEXSTRING:
valueType = CERT_RDN_VIDEOTEX_STRING;
bytesNeeded += dataLen * 2;
break;
case ASN_GRAPHICSTRING:
valueType = CERT_RDN_GRAPHIC_STRING;
bytesNeeded += dataLen * 2;
break;
case ASN_VISIBLESTRING:
valueType = CERT_RDN_VISIBLE_STRING;
bytesNeeded += dataLen * 2;
break;
case ASN_GENERALSTRING:
valueType = CERT_RDN_GENERAL_STRING;
bytesNeeded += dataLen * 2;
break;
case ASN_UNIVERSALSTRING:
valueType = CERT_RDN_UNIVERSAL_STRING;
bytesNeeded += dataLen / 2;
break;
case ASN_BMPSTRING:
valueType = CERT_RDN_BMP_STRING;
bytesNeeded += dataLen;
break;
case ASN_UTF8STRING:
valueType = CERT_RDN_UTF8_STRING;
bytesNeeded += MultiByteToWideChar(CP_UTF8, 0,
(LPCSTR)pbEncoded + 1 + lenBytes, dataLen, NULL, 0) * 2;
break;
default:
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!value)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pcbStructInfo = bytesNeeded;
value->dwValueType = valueType;
if (dataLen)
{
DWORD i;
LPWSTR str = (LPWSTR)value->Value.pbData;
assert(value->Value.pbData);
switch (pbEncoded[0])
{
case ASN_NUMERICSTRING:
case ASN_PRINTABLESTRING:
case ASN_IA5STRING:
case ASN_T61STRING:
case ASN_VIDEOTEXSTRING:
case ASN_GRAPHICSTRING:
case ASN_VISIBLESTRING:
case ASN_GENERALSTRING:
value->Value.cbData = dataLen * 2;
for (i = 0; i < dataLen; i++)
str[i] = pbEncoded[1 + lenBytes + i];
break;
case ASN_UNIVERSALSTRING:
value->Value.cbData = dataLen / 2;
for (i = 0; i < dataLen / 4; i++)
str[i] = (pbEncoded[1 + lenBytes + 2 * i + 2] << 8)
| pbEncoded[1 + lenBytes + 2 * i + 3];
break;
case ASN_BMPSTRING:
value->Value.cbData = dataLen;
for (i = 0; i < dataLen / 2; i++)
str[i] = (pbEncoded[1 + lenBytes + 2 * i] << 8) |
pbEncoded[1 + lenBytes + 2 * i + 1];
break;
case ASN_UTF8STRING:
value->Value.cbData = MultiByteToWideChar(CP_UTF8, 0,
(LPCSTR)pbEncoded + 1 + lenBytes, dataLen,
str, bytesNeeded - sizeof(CERT_NAME_VALUE)) * 2;
break;
}
}
else
{
value->Value.cbData = 0;
value->Value.pbData = NULL;
}
}
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeUnicodeNameValue(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
__TRY
{
ret = CRYPT_AsnDecodeUnicodeNameValueInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
if (ret && pvStructInfo)
{
ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, *pcbStructInfo);
if (ret)
{
CERT_NAME_VALUE *value;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
value = (CERT_NAME_VALUE *)pvStructInfo;
value->Value.pbData = ((BYTE *)value + sizeof(CERT_NAME_VALUE));
ret = CRYPT_AsnDecodeUnicodeNameValueInternal(pbEncoded,
cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
pcbStructInfo, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeRdnAttr(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CERT_RDN_ATTR, pszObjId),
CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
offsetof(CERT_RDN_ATTR, pszObjId), 0 },
{ 0, offsetof(CERT_RDN_ATTR, dwValueType),
CRYPT_AsnDecodeNameValueInternal, sizeof(CERT_NAME_VALUE),
FALSE, TRUE, offsetof(CERT_RDN_ATTR, Value.pbData), 0 },
};
CERT_RDN_ATTR *attr = (CERT_RDN_ATTR *)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
if (attr)
TRACE("attr->pszObjId is %p\n", attr->pszObjId);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, attr, pcbStructInfo, pcbDecoded,
attr ? attr->pszObjId : NULL);
if (attr)
{
TRACE("attr->pszObjId is %p (%s)\n", attr->pszObjId,
debugstr_a(attr->pszObjId));
TRACE("attr->dwValueType is %d\n", attr->dwValueType);
}
TRACE("returning %d (%08x)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeRdn(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret = TRUE;
struct AsnArrayDescriptor arrayDesc = { ASN_CONSTRUCTOR | ASN_SETOF,
CRYPT_AsnDecodeRdnAttr, sizeof(CERT_RDN_ATTR), TRUE,
offsetof(CERT_RDN_ATTR, pszObjId) };
PCERT_RDN rdn = (PCERT_RDN)pvStructInfo;
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
rdn ? rdn->rgRDNAttr : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeName(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
__TRY
{
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
CRYPT_AsnDecodeRdn, sizeof(CERT_RDN), TRUE,
offsetof(CERT_RDN, rgRDNAttr) };
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeUnicodeRdnAttr(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CERT_RDN_ATTR, pszObjId),
CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
offsetof(CERT_RDN_ATTR, pszObjId), 0 },
{ 0, offsetof(CERT_RDN_ATTR, dwValueType),
CRYPT_AsnDecodeUnicodeNameValueInternal, sizeof(CERT_NAME_VALUE),
FALSE, TRUE, offsetof(CERT_RDN_ATTR, Value.pbData), 0 },
};
CERT_RDN_ATTR *attr = (CERT_RDN_ATTR *)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
if (attr)
TRACE("attr->pszObjId is %p\n", attr->pszObjId);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, attr, pcbStructInfo, pcbDecoded,
attr ? attr->pszObjId : NULL);
if (attr)
{
TRACE("attr->pszObjId is %p (%s)\n", attr->pszObjId,
debugstr_a(attr->pszObjId));
TRACE("attr->dwValueType is %d\n", attr->dwValueType);
}
TRACE("returning %d (%08x)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeUnicodeRdn(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret = TRUE;
struct AsnArrayDescriptor arrayDesc = { ASN_CONSTRUCTOR | ASN_SETOF,
CRYPT_AsnDecodeUnicodeRdnAttr, sizeof(CERT_RDN_ATTR), TRUE,
offsetof(CERT_RDN_ATTR, pszObjId) };
PCERT_RDN rdn = (PCERT_RDN)pvStructInfo;
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
rdn ? rdn->rgRDNAttr : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeUnicodeName(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
__TRY
{
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
CRYPT_AsnDecodeUnicodeRdn, sizeof(CERT_RDN), TRUE,
offsetof(CERT_RDN, rgRDNAttr) };
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_FindEncodedLen(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD *pcbDecoded)
{
BOOL ret = TRUE, done = FALSE;
DWORD indefiniteNestingLevels = 0, decoded = 0;
TRACE("(%p, %d)\n", pbEncoded, cbEncoded);
do {
DWORD dataLen;
if (!cbEncoded)
done = TRUE;
else if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded,
&dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
if (dataLen == CMSG_INDEFINITE_LENGTH)
{
indefiniteNestingLevels++;
pbEncoded += 1 + lenBytes;
cbEncoded -= 1 + lenBytes;
decoded += 1 + lenBytes;
TRACE("indefiniteNestingLevels = %d\n",
indefiniteNestingLevels);
}
else
{
if (pbEncoded[0] == 0 && pbEncoded[1] == 0 &&
indefiniteNestingLevels)
{
indefiniteNestingLevels--;
TRACE("indefiniteNestingLevels = %d\n",
indefiniteNestingLevels);
}
pbEncoded += 1 + lenBytes + dataLen;
cbEncoded -= 1 + lenBytes + dataLen;
decoded += 1 + lenBytes + dataLen;
if (!indefiniteNestingLevels)
done = TRUE;
}
}
} while (ret && !done);
/* If we haven't found all 0 TLVs, we haven't found the end */
if (ret && indefiniteNestingLevels)
{
SetLastError(CRYPT_E_ASN1_EOD);
ret = FALSE;
}
if (ret)
*pcbDecoded = decoded;
TRACE("returning %d (%d)\n", ret, ret ? *pcbDecoded : 0);
return ret;
}
static BOOL CRYPT_AsnDecodeCopyBytes(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
DWORD bytesNeeded = sizeof(CRYPT_OBJID_BLOB), encodedLen = 0;
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
if ((ret = CRYPT_FindEncodedLen(pbEncoded, cbEncoded, &encodedLen)))
{
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += encodedLen;
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 = encodedLen;
if (encodedLen)
{
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
blob->pbData = (LPBYTE)pbEncoded;
else
{
assert(blob->pbData);
memcpy(blob->pbData, pbEncoded, blob->cbData);
}
}
else
blob->pbData = NULL;
}
if (pcbDecoded)
*pcbDecoded = encodedLen;
}
return ret;
}
static BOOL CRYPT_DecodeDERArray(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { 0, CRYPT_AsnDecodeCopyBytes,
sizeof(CRYPT_DER_BLOB), TRUE, offsetof(CRYPT_DER_BLOB, pbData) };
struct GenericArray *array = (struct GenericArray *)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
array ? array->rgItems : NULL);
return ret;
}
static BOOL CRYPT_AsnDecodeCTLUsage(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), TRUE, 0 };
CTL_USAGE *usage = (CTL_USAGE *)pvStructInfo;
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
usage ? usage->rgpszUsageIdentifier : NULL);
return ret;
}
static BOOL CRYPT_AsnDecodeCTLEntry(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_OCTETSTRING, offsetof(CTL_ENTRY, SubjectIdentifier),
CRYPT_AsnDecodeOctetsInternal, sizeof(CRYPT_DATA_BLOB), FALSE, TRUE,
offsetof(CTL_ENTRY, SubjectIdentifier.pbData), 0 },
{ ASN_CONSTRUCTOR | ASN_SETOF, offsetof(CTL_ENTRY, cAttribute),
CRYPT_AsnDecodePKCSAttributesInternal, sizeof(CRYPT_ATTRIBUTES), FALSE,
TRUE, offsetof(CTL_ENTRY, rgAttribute), 0 },
};
BOOL ret = TRUE;
CTL_ENTRY *entry = (CTL_ENTRY *)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags, entry,
*pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, entry, pcbStructInfo,
pcbDecoded, entry ? entry->SubjectIdentifier.pbData : NULL);
return ret;
}
static BOOL CRYPT_AsnDecodeCTLEntries(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
CRYPT_AsnDecodeCTLEntry, sizeof(CTL_ENTRY), TRUE,
offsetof(CTL_ENTRY, SubjectIdentifier.pbData) };
struct GenericArray *entries = (struct GenericArray *)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
entries ? entries->rgItems : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCTL(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CTL_INFO, dwVersion),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), TRUE, FALSE, 0, 0 },
{ ASN_SEQUENCEOF, offsetof(CTL_INFO, SubjectUsage),
CRYPT_AsnDecodeCTLUsage, sizeof(CTL_USAGE), FALSE, TRUE,
offsetof(CTL_INFO, SubjectUsage.rgpszUsageIdentifier), 0 },
{ ASN_OCTETSTRING, offsetof(CTL_INFO, ListIdentifier),
CRYPT_AsnDecodeOctetsInternal, sizeof(CRYPT_DATA_BLOB), TRUE,
TRUE, offsetof(CTL_INFO, ListIdentifier.pbData), 0 },
{ ASN_INTEGER, offsetof(CTL_INFO, SequenceNumber),
CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB),
TRUE, TRUE, offsetof(CTL_INFO, SequenceNumber.pbData), 0 },
{ 0, offsetof(CTL_INFO, ThisUpdate),
CRYPT_AsnDecodeChoiceOfTimeInternal, sizeof(FILETIME), FALSE, FALSE,
0 },
{ 0, offsetof(CTL_INFO, NextUpdate),
CRYPT_AsnDecodeChoiceOfTimeInternal, sizeof(FILETIME), TRUE, FALSE,
0 },
{ ASN_SEQUENCEOF, offsetof(CTL_INFO, SubjectAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CTL_INFO, SubjectAlgorithm.pszObjId), 0 },
{ ASN_SEQUENCEOF, offsetof(CTL_INFO, cCTLEntry),
CRYPT_AsnDecodeCTLEntries, sizeof(struct GenericArray),
TRUE, TRUE, offsetof(CTL_INFO, rgCTLEntry), 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 0, offsetof(CTL_INFO, cExtension),
CRYPT_AsnDecodeCertExtensions, sizeof(CERT_EXTENSIONS), TRUE, TRUE,
offsetof(CTL_INFO, rgExtension), 0 },
};
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeSMIMECapability(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CRYPT_SMIME_CAPABILITY, pszObjId),
CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
offsetof(CRYPT_SMIME_CAPABILITY, pszObjId), 0 },
{ 0, offsetof(CRYPT_SMIME_CAPABILITY, Parameters),
CRYPT_AsnDecodeCopyBytes, sizeof(CRYPT_OBJID_BLOB), TRUE, TRUE,
offsetof(CRYPT_SMIME_CAPABILITY, Parameters.pbData), 0 },
};
PCRYPT_SMIME_CAPABILITY capability = (PCRYPT_SMIME_CAPABILITY)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, capability ? capability->pszObjId : NULL);
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodeSMIMECapabilitiesInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
struct AsnArrayDescriptor arrayDesc = { 0,
CRYPT_AsnDecodeSMIMECapability, sizeof(CRYPT_SMIME_CAPABILITY), TRUE,
offsetof(CRYPT_SMIME_CAPABILITY, pszObjId) };
PCRYPT_SMIME_CAPABILITIES capabilities =
(PCRYPT_SMIME_CAPABILITIES)pvStructInfo;
BOOL ret;
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
capabilities ? capabilities->rgCapability : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeSMIMECapabilities(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
DWORD bytesNeeded;
if (!cbEncoded)
SetLastError(CRYPT_E_ASN1_EOD);
else if (pbEncoded[0] != ASN_SEQUENCEOF)
SetLastError(CRYPT_E_ASN1_CORRUPT);
else if ((ret = CRYPT_AsnDecodeSMIMECapabilitiesInternal(pbEncoded,
cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded,
NULL)))
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
PCRYPT_SMIME_CAPABILITIES capabilities;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
capabilities = (PCRYPT_SMIME_CAPABILITIES)pvStructInfo;
capabilities->rgCapability =
(PCRYPT_SMIME_CAPABILITY)((BYTE *)pvStructInfo +
sizeof(CRYPT_SMIME_CAPABILITIES));
ret = CRYPT_AsnDecodeSMIMECapabilitiesInternal(pbEncoded,
cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodePKCSAttributeInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CRYPT_ATTRIBUTE, pszObjId),
CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
offsetof(CRYPT_ATTRIBUTE, pszObjId), 0 },
{ ASN_CONSTRUCTOR | ASN_SETOF, offsetof(CRYPT_ATTRIBUTE, cValue),
CRYPT_DecodeDERArray, sizeof(struct GenericArray), FALSE, TRUE,
offsetof(CRYPT_ATTRIBUTE, rgValue), 0 },
};
PCRYPT_ATTRIBUTE attr = (PCRYPT_ATTRIBUTE)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, attr ? attr->pszObjId : NULL);
TRACE("returning %d\n", ret);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodePKCSAttribute(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
DWORD bytesNeeded;
ret = CRYPT_AsnDecodePKCSAttributeInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL);
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
PCRYPT_ATTRIBUTE attr;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
attr = (PCRYPT_ATTRIBUTE)pvStructInfo;
attr->pszObjId = (LPSTR)((BYTE *)pvStructInfo +
sizeof(CRYPT_ATTRIBUTE));
ret = CRYPT_AsnDecodePKCSAttributeInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo, &bytesNeeded,
NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodePKCSAttributesInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
struct AsnArrayDescriptor arrayDesc = { 0,
CRYPT_AsnDecodePKCSAttributeInternal, sizeof(CRYPT_ATTRIBUTE), TRUE,
offsetof(CRYPT_ATTRIBUTE, pszObjId) };
PCRYPT_ATTRIBUTES attrs = (PCRYPT_ATTRIBUTES)pvStructInfo;
BOOL ret;
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded, attrs ? attrs->rgAttr :
NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodePKCSAttributes(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
DWORD bytesNeeded;
if (!cbEncoded)
SetLastError(CRYPT_E_ASN1_EOD);
else if (pbEncoded[0] != (ASN_CONSTRUCTOR | ASN_SETOF))
SetLastError(CRYPT_E_ASN1_CORRUPT);
else if ((ret = CRYPT_AsnDecodePKCSAttributesInternal(pbEncoded,
cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded,
NULL)))
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
PCRYPT_ATTRIBUTES attrs;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
attrs = (PCRYPT_ATTRIBUTES)pvStructInfo;
attrs->rgAttr = (PCRYPT_ATTRIBUTE)((BYTE *)pvStructInfo +
sizeof(CRYPT_ATTRIBUTES));
ret = CRYPT_AsnDecodePKCSAttributesInternal(pbEncoded,
cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodeAlgorithmId(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
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, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, algo ? algo->pszObjId : NULL);
if (ret && pvStructInfo)
{
TRACE("pszObjId is %p (%s)\n", algo->pszObjId,
debugstr_a(algo->pszObjId));
}
return ret;
}
static BOOL CRYPT_AsnDecodePubKeyInfoInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
struct AsnDecodeSequenceItem items[] = {
{ ASN_SEQUENCEOF, offsetof(CERT_PUBLIC_KEY_INFO, Algorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CERT_PUBLIC_KEY_INFO,
Algorithm.pszObjId) },
{ ASN_BITSTRING, offsetof(CERT_PUBLIC_KEY_INFO, PublicKey),
CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
offsetof(CERT_PUBLIC_KEY_INFO, PublicKey.pbData) },
};
PCERT_PUBLIC_KEY_INFO info = (PCERT_PUBLIC_KEY_INFO)pvStructInfo;
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, info ? info->Algorithm.Parameters.pbData : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodePubKeyInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
__TRY
{
DWORD bytesNeeded;
if ((ret = CRYPT_AsnDecodePubKeyInfoInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL)))
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
PCERT_PUBLIC_KEY_INFO info;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
info = (PCERT_PUBLIC_KEY_INFO)pvStructInfo;
info->Algorithm.Parameters.pbData = (BYTE *)pvStructInfo +
sizeof(CERT_PUBLIC_KEY_INFO);
ret = CRYPT_AsnDecodePubKeyInfoInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeBool(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
if (cbEncoded < 3)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
return FALSE;
}
if (GET_LEN_BYTES(pbEncoded[1]) > 1)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
return FALSE;
}
if (pbEncoded[1] > 1)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
return FALSE;
}
if (pcbDecoded)
*pcbDecoded = 3;
if (!pvStructInfo)
{
*pcbStructInfo = sizeof(BOOL);
ret = TRUE;
}
else if (*pcbStructInfo < sizeof(BOOL))
{
*pcbStructInfo = sizeof(BOOL);
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pcbStructInfo = sizeof(BOOL);
*(BOOL *)pvStructInfo = pbEncoded[2] ? TRUE : FALSE;
ret = TRUE;
}
TRACE("returning %d (%08x)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeAltNameEntry(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
PCERT_ALT_NAME_ENTRY entry = (PCERT_ALT_NAME_ENTRY)pvStructInfo;
DWORD dataLen, lenBytes, bytesNeeded = sizeof(CERT_ALT_NAME_ENTRY);
BOOL ret;
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
if (cbEncoded < 2)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
return FALSE;
}
lenBytes = GET_LEN_BYTES(pbEncoded[1]);
if (1 + lenBytes > cbEncoded)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
return FALSE;
}
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
switch (pbEncoded[0] & ASN_TYPE_MASK)
{
case 1: /* rfc822Name */
case 2: /* dNSName */
case 6: /* uniformResourceIdentifier */
bytesNeeded += (dataLen + 1) * sizeof(WCHAR);
break;
case 4: /* directoryName */
case 7: /* iPAddress */
bytesNeeded += dataLen;
break;
case 8: /* registeredID */
ret = CRYPT_AsnDecodeOidIgnoreTag(pbEncoded, cbEncoded, 0, NULL,
&dataLen, NULL);
if (ret)
{
/* FIXME: ugly, shouldn't need to know internals of OID decode
* function to use it.
*/
bytesNeeded += dataLen - sizeof(LPSTR);
}
break;
case 0: /* otherName */
FIXME("%d: stub\n", pbEncoded[0] & ASN_TYPE_MASK);
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
break;
case 3: /* x400Address, unimplemented */
case 5: /* ediPartyName, unimplemented */
TRACE("type %d unimplemented\n", pbEncoded[0] & ASN_TYPE_MASK);
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
break;
default:
TRACE("type %d bad\n", pbEncoded[0] & ASN_TYPE_MASK);
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
if (ret)
{
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!entry)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pcbStructInfo = bytesNeeded;
/* MS used values one greater than the asn1 ones.. sigh */
entry->dwAltNameChoice = (pbEncoded[0] & 0x7f) + 1;
switch (pbEncoded[0] & ASN_TYPE_MASK)
{
case 1: /* rfc822Name */
case 2: /* dNSName */
case 6: /* uniformResourceIdentifier */
{
DWORD i;
for (i = 0; i < dataLen; i++)
entry->u.pwszURL[i] =
(WCHAR)pbEncoded[1 + lenBytes + i];
entry->u.pwszURL[i] = 0;
TRACE("URL is %p (%s)\n", entry->u.pwszURL,
debugstr_w(entry->u.pwszURL));
break;
}
case 4: /* directoryName */
entry->dwAltNameChoice = CERT_ALT_NAME_DIRECTORY_NAME;
/* The data are memory-equivalent with the IPAddress case,
* fall-through
*/
case 7: /* iPAddress */
/* The next data pointer is in the pwszURL spot, that is,
* the first 4 bytes. Need to move it to the next spot.
*/
entry->u.IPAddress.pbData = (LPBYTE)entry->u.pwszURL;
entry->u.IPAddress.cbData = dataLen;
memcpy(entry->u.IPAddress.pbData, pbEncoded + 1 + lenBytes,
dataLen);
break;
case 8: /* registeredID */
ret = CRYPT_AsnDecodeOidIgnoreTag(pbEncoded, cbEncoded, 0,
&entry->u.pszRegisteredID, &dataLen, NULL);
break;
}
}
}
}
return ret;
}
static BOOL CRYPT_AsnDecodeAltNameInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
struct AsnArrayDescriptor arrayDesc = { 0,
CRYPT_AsnDecodeAltNameEntry, sizeof(CERT_ALT_NAME_ENTRY), TRUE,
offsetof(CERT_ALT_NAME_ENTRY, u.pwszURL) };
PCERT_ALT_NAME_INFO info = (PCERT_ALT_NAME_INFO)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
if (info)
TRACE("info->rgAltEntry is %p\n", info->rgAltEntry);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
info ? info->rgAltEntry : NULL);
return ret;
}
/* Like CRYPT_AsnDecodeIntegerInternal, but swaps the bytes */
static BOOL CRYPT_AsnDecodeIntegerSwapBytes(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
TRACE("(%p, %d, 0x%08x, %p, %d, %p)\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
/* Can't use the CRYPT_DECODE_NOCOPY_FLAG, because we modify the bytes in-
* place.
*/
ret = CRYPT_AsnDecodeIntegerInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_NOCOPY_FLAG, pvStructInfo, pcbStructInfo,
pcbDecoded);
if (ret && pvStructInfo)
{
CRYPT_DATA_BLOB *blob = (CRYPT_DATA_BLOB *)pvStructInfo;
if (blob->cbData)
{
DWORD i;
BYTE temp;
for (i = 0; i < blob->cbData / 2; i++)
{
temp = blob->pbData[i];
blob->pbData[i] = blob->pbData[blob->cbData - i - 1];
blob->pbData[blob->cbData - i - 1] = temp;
}
}
}
TRACE("returning %d (%08x)\n", ret, GetLastError());
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeAuthorityKeyId(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_CONTEXT | 0, offsetof(CERT_AUTHORITY_KEY_ID_INFO, KeyId),
CRYPT_AsnDecodeIntegerSwapBytes, sizeof(CRYPT_DATA_BLOB),
TRUE, TRUE, offsetof(CERT_AUTHORITY_KEY_ID_INFO, KeyId.pbData), 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR| 1,
offsetof(CERT_AUTHORITY_KEY_ID_INFO, CertIssuer),
CRYPT_AsnDecodeOctetsInternal, sizeof(CERT_NAME_BLOB), TRUE, TRUE,
offsetof(CERT_AUTHORITY_KEY_ID_INFO, CertIssuer.pbData), 0 },
{ ASN_CONTEXT | 2, offsetof(CERT_AUTHORITY_KEY_ID_INFO,
CertSerialNumber), CRYPT_AsnDecodeIntegerInternal,
sizeof(CRYPT_INTEGER_BLOB), TRUE, TRUE,
offsetof(CERT_AUTHORITY_KEY_ID_INFO, CertSerialNumber.pbData), 0 },
};
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeAuthorityKeyId2(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_CONTEXT | 0, offsetof(CERT_AUTHORITY_KEY_ID2_INFO, KeyId),
CRYPT_AsnDecodeIntegerSwapBytes, sizeof(CRYPT_DATA_BLOB),
TRUE, TRUE, offsetof(CERT_AUTHORITY_KEY_ID2_INFO, KeyId.pbData), 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR| 1,
offsetof(CERT_AUTHORITY_KEY_ID2_INFO, AuthorityCertIssuer),
CRYPT_AsnDecodeAltNameInternal, sizeof(CERT_ALT_NAME_INFO), TRUE,
TRUE, offsetof(CERT_AUTHORITY_KEY_ID2_INFO,
AuthorityCertIssuer.rgAltEntry), 0 },
{ ASN_CONTEXT | 2, offsetof(CERT_AUTHORITY_KEY_ID2_INFO,
AuthorityCertSerialNumber), CRYPT_AsnDecodeIntegerInternal,
sizeof(CRYPT_INTEGER_BLOB), TRUE, TRUE,
offsetof(CERT_AUTHORITY_KEY_ID2_INFO,
AuthorityCertSerialNumber.pbData), 0 },
};
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeAccessDescription(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
struct AsnDecodeSequenceItem items[] = {
{ 0, offsetof(CERT_ACCESS_DESCRIPTION, pszAccessMethod),
CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), FALSE, TRUE,
offsetof(CERT_ACCESS_DESCRIPTION, pszAccessMethod), 0 },
{ 0, offsetof(CERT_ACCESS_DESCRIPTION, AccessLocation),
CRYPT_AsnDecodeAltNameEntry, sizeof(CERT_ALT_NAME_ENTRY), FALSE,
TRUE, offsetof(CERT_ACCESS_DESCRIPTION, AccessLocation.u.pwszURL), 0 },
};
CERT_ACCESS_DESCRIPTION *descr = (CERT_ACCESS_DESCRIPTION *)pvStructInfo;
return CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, descr ? descr->pszAccessMethod : NULL);
}
static BOOL WINAPI CRYPT_AsnDecodeAuthorityInfoAccess(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
CRYPT_AsnDecodeAccessDescription, sizeof(CERT_ACCESS_DESCRIPTION),
TRUE, offsetof(CERT_ACCESS_DESCRIPTION, pszAccessMethod) };
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodePKCSContent(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
DWORD dataLen;
TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
/* The caller has already checked the tag, no need to check it again.
* Check the outer length is valid:
*/
if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD innerLen;
pbEncoded += 1 + lenBytes;
cbEncoded -= 1 + lenBytes;
if (dataLen == CMSG_INDEFINITE_LENGTH)
cbEncoded -= 2; /* space for 0 TLV */
/* Check the inner length is valid: */
if ((ret = CRYPT_GetLengthIndefinite(pbEncoded, cbEncoded, &innerLen)))
{
DWORD decodedLen;
ret = CRYPT_AsnDecodeCopyBytes(pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pcbStructInfo, &decodedLen);
if (dataLen == CMSG_INDEFINITE_LENGTH)
{
if (*(pbEncoded + decodedLen) != 0 ||
*(pbEncoded + decodedLen + 1) != 0)
{
TRACE("expected 0 TLV, got {%02x,%02x}\n",
*(pbEncoded + decodedLen),
*(pbEncoded + decodedLen + 1));
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
decodedLen += 2;
}
if (ret && pcbDecoded)
{
*pcbDecoded = 1 + lenBytes + decodedLen;
TRACE("decoded %d bytes\n", *pcbDecoded);
}
}
}
return ret;
}
static BOOL CRYPT_AsnDecodePKCSContentInfoInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
CRYPT_CONTENT_INFO *info = (CRYPT_CONTENT_INFO *)pvStructInfo;
struct AsnDecodeSequenceItem items[] = {
{ ASN_OBJECTIDENTIFIER, offsetof(CRYPT_CONTENT_INFO, pszObjId),
CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
offsetof(CRYPT_CONTENT_INFO, pszObjId), 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 0,
offsetof(CRYPT_CONTENT_INFO, Content), CRYPT_AsnDecodePKCSContent,
sizeof(CRYPT_DER_BLOB), TRUE, TRUE,
offsetof(CRYPT_CONTENT_INFO, Content.pbData), 0 },
};
BOOL ret;
TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, info ? info->pszObjId : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodePKCSContentInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
ret = CRYPT_AsnDecodePKCSContentInfoInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
if (ret && pvStructInfo)
{
ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, *pcbStructInfo);
if (ret)
{
CRYPT_CONTENT_INFO *info;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
info = (CRYPT_CONTENT_INFO *)pvStructInfo;
info->pszObjId = (LPSTR)((BYTE *)info +
sizeof(CRYPT_CONTENT_INFO));
ret = CRYPT_AsnDecodePKCSContentInfoInternal(pbEncoded,
cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
pcbStructInfo, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
return ret;
}
BOOL CRYPT_AsnDecodePKCSDigestedData(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
CRYPT_DIGESTED_DATA *digestedData, DWORD *pcbDigestedData)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CRYPT_DIGESTED_DATA, version),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
{ ASN_SEQUENCEOF, offsetof(CRYPT_DIGESTED_DATA, DigestAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CRYPT_DIGESTED_DATA, DigestAlgorithm.pszObjId),
0 },
{ ASN_SEQUENCEOF, offsetof(CRYPT_DIGESTED_DATA, ContentInfo),
CRYPT_AsnDecodePKCSContentInfoInternal,
sizeof(CRYPT_CONTENT_INFO), FALSE, TRUE, offsetof(CRYPT_DIGESTED_DATA,
ContentInfo.pszObjId), 0 },
{ ASN_OCTETSTRING, offsetof(CRYPT_DIGESTED_DATA, hash),
CRYPT_AsnDecodeOctetsInternal, sizeof(CRYPT_HASH_BLOB), FALSE, TRUE,
offsetof(CRYPT_DIGESTED_DATA, hash.pbData), 0 },
};
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, pDecodePara, digestedData, pcbDigestedData,
NULL, NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeAltName(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
DWORD bytesNeeded;
if ((ret = CRYPT_AsnDecodeAltNameInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL)))
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
CERT_ALT_NAME_INFO *name;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
name = (CERT_ALT_NAME_INFO *)pvStructInfo;
name->rgAltEntry = (PCERT_ALT_NAME_ENTRY)
((BYTE *)pvStructInfo + sizeof(CERT_ALT_NAME_INFO));
ret = CRYPT_AsnDecodeAltNameInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
struct PATH_LEN_CONSTRAINT
{
BOOL fPathLenConstraint;
DWORD dwPathLenConstraint;
};
static BOOL CRYPT_AsnDecodePathLenConstraint(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
DWORD bytesNeeded = sizeof(struct PATH_LEN_CONSTRAINT), size;
TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
if (!pvStructInfo)
{
ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded, dwFlags, NULL,
&size, pcbDecoded);
*pcbStructInfo = bytesNeeded;
}
else if (*pcbStructInfo < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
*pcbStructInfo = bytesNeeded;
ret = FALSE;
}
else
{
struct PATH_LEN_CONSTRAINT *constraint =
(struct PATH_LEN_CONSTRAINT *)pvStructInfo;
*pcbStructInfo = bytesNeeded;
size = sizeof(constraint->dwPathLenConstraint);
ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded, dwFlags,
&constraint->dwPathLenConstraint, &size, pcbDecoded);
if (ret)
constraint->fPathLenConstraint = TRUE;
TRACE("got an int, dwPathLenConstraint is %d\n",
constraint->dwPathLenConstraint);
}
TRACE("returning %d (%08x)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnDecodeSubtreeConstraints(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
CRYPT_AsnDecodeCopyBytes, sizeof(CERT_NAME_BLOB), TRUE,
offsetof(CERT_NAME_BLOB, pbData) };
struct GenericArray *entries = (struct GenericArray *)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
entries ? entries->rgItems : NULL);
TRACE("Returning %d (%08x)\n", ret, GetLastError());
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeBasicConstraints(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_BITSTRING, offsetof(CERT_BASIC_CONSTRAINTS_INFO, SubjectType),
CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
offsetof(CERT_BASIC_CONSTRAINTS_INFO, SubjectType.pbData), 0 },
{ ASN_INTEGER, offsetof(CERT_BASIC_CONSTRAINTS_INFO,
fPathLenConstraint), CRYPT_AsnDecodePathLenConstraint,
sizeof(struct PATH_LEN_CONSTRAINT), TRUE, FALSE, 0, 0 },
{ ASN_SEQUENCEOF, offsetof(CERT_BASIC_CONSTRAINTS_INFO,
cSubtreesConstraint), CRYPT_AsnDecodeSubtreeConstraints,
sizeof(struct GenericArray), TRUE, TRUE,
offsetof(CERT_BASIC_CONSTRAINTS_INFO, rgSubtreesConstraint), 0 },
};
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeBasicConstraints2(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_BOOL, offsetof(CERT_BASIC_CONSTRAINTS2_INFO, fCA),
CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE, FALSE, 0, 0 },
{ ASN_INTEGER, offsetof(CERT_BASIC_CONSTRAINTS2_INFO,
fPathLenConstraint), CRYPT_AsnDecodePathLenConstraint,
sizeof(struct PATH_LEN_CONSTRAINT), TRUE, FALSE, 0, 0 },
};
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
#define RSA1_MAGIC 0x31415352
struct DECODED_RSA_PUB_KEY
{
DWORD pubexp;
CRYPT_INTEGER_BLOB modulus;
};
static BOOL WINAPI CRYPT_AsnDecodeRsaPubKey(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(struct DECODED_RSA_PUB_KEY, modulus),
CRYPT_AsnDecodeUnsignedIntegerInternal, sizeof(CRYPT_INTEGER_BLOB),
FALSE, TRUE, offsetof(struct DECODED_RSA_PUB_KEY, modulus.pbData),
0 },
{ ASN_INTEGER, offsetof(struct DECODED_RSA_PUB_KEY, pubexp),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
};
struct DECODED_RSA_PUB_KEY *decodedKey = NULL;
DWORD size = 0;
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, CRYPT_DECODE_ALLOC_FLAG, NULL, &decodedKey,
&size, NULL, NULL);
if (ret)
{
DWORD bytesNeeded = sizeof(BLOBHEADER) + sizeof(RSAPUBKEY) +
decodedKey->modulus.cbData;
if (!pvStructInfo)
{
*pcbStructInfo = bytesNeeded;
ret = TRUE;
}
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
BLOBHEADER *hdr;
RSAPUBKEY *rsaPubKey;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
hdr = (BLOBHEADER *)pvStructInfo;
hdr->bType = PUBLICKEYBLOB;
hdr->bVersion = CUR_BLOB_VERSION;
hdr->reserved = 0;
hdr->aiKeyAlg = CALG_RSA_KEYX;
rsaPubKey = (RSAPUBKEY *)((BYTE *)pvStructInfo +
sizeof(BLOBHEADER));
rsaPubKey->magic = RSA1_MAGIC;
rsaPubKey->pubexp = decodedKey->pubexp;
rsaPubKey->bitlen = decodedKey->modulus.cbData * 8;
memcpy((BYTE *)pvStructInfo + sizeof(BLOBHEADER) +
sizeof(RSAPUBKEY), decodedKey->modulus.pbData,
decodedKey->modulus.cbData);
}
LocalFree(decodedKey);
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeOctetsInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
DWORD bytesNeeded, dataLen;
TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
bytesNeeded = sizeof(CRYPT_DATA_BLOB);
else
bytesNeeded = dataLen + sizeof(CRYPT_DATA_BLOB);
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
*pcbStructInfo = bytesNeeded;
ret = FALSE;
}
else
{
CRYPT_DATA_BLOB *blob;
*pcbStructInfo = bytesNeeded;
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_AsnDecodeOctets(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
DWORD bytesNeeded;
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_AsnDecodeOctetsInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL)))
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
CRYPT_DATA_BLOB *blob;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
blob = (CRYPT_DATA_BLOB *)pvStructInfo;
blob->pbData = (BYTE *)pvStructInfo + sizeof(CRYPT_DATA_BLOB);
ret = CRYPT_AsnDecodeOctetsInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeBitsInternal(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
TRACE("(%p, %d, 0x%08x, %p, %d, %p)\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
if (pbEncoded[0] == ASN_BITSTRING)
{
DWORD bytesNeeded, dataLen;
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
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 (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
CRYPT_BIT_BLOB *blob;
*pcbStructInfo = bytesNeeded;
blob = (CRYPT_BIT_BLOB *)pvStructInfo;
blob->cbData = dataLen - 1;
blob->cUnusedBits = *(pbEncoded + 1 + lenBytes);
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
{
blob->pbData = (BYTE *)pbEncoded + 2 + lenBytes;
}
else
{
assert(blob->pbData);
if (blob->cbData)
{
BYTE mask = 0xff << blob->cUnusedBits;
memcpy(blob->pbData, pbEncoded + 2 + lenBytes,
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_AsnDecodeBits(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
TRACE("(%p, %d, 0x%08x, %p, %p, %p)\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo);
__TRY
{
DWORD bytesNeeded;
if ((ret = CRYPT_AsnDecodeBitsInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL)))
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
CRYPT_BIT_BLOB *blob;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
blob = (CRYPT_BIT_BLOB *)pvStructInfo;
blob->pbData = (BYTE *)pvStructInfo + sizeof(CRYPT_BIT_BLOB);
ret = CRYPT_AsnDecodeBitsInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
TRACE("returning %d (%08x)\n", ret, GetLastError());
return ret;
}
/* Ignores tag. Only allows integers 4 bytes or smaller in size. */
static BOOL CRYPT_AsnDecodeIntInternal(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
BYTE buf[sizeof(CRYPT_INTEGER_BLOB) + sizeof(int)];
CRYPT_INTEGER_BLOB *blob = (CRYPT_INTEGER_BLOB *)buf;
DWORD size = sizeof(buf);
blob->pbData = buf + sizeof(CRYPT_INTEGER_BLOB);
ret = CRYPT_AsnDecodeIntegerInternal(pbEncoded, cbEncoded, 0, buf,
&size, pcbDecoded);
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = sizeof(int);
else if ((ret = CRYPT_DecodeCheckSpace(pcbStructInfo, sizeof(int))))
{
int val, i;
if (blob->pbData[blob->cbData - 1] & 0x80)
{
/* initialize to a negative value to sign-extend */
val = -1;
}
else
val = 0;
for (i = 0; i < blob->cbData; i++)
{
val <<= 8;
val |= blob->pbData[blob->cbData - i - 1];
}
memcpy(pvStructInfo, &val, sizeof(int));
}
}
else if (GetLastError() == ERROR_MORE_DATA)
SetLastError(CRYPT_E_ASN1_LARGE);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeInt(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
DWORD bytesNeeded;
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else if (pbEncoded[0] != ASN_INTEGER)
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
else
ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL);
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeIntegerInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
DWORD bytesNeeded, dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
bytesNeeded = dataLen + sizeof(CRYPT_INTEGER_BLOB);
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
CRYPT_INTEGER_BLOB *blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
*pcbStructInfo = bytesNeeded;
blob->cbData = dataLen;
assert(blob->pbData);
if (blob->cbData)
{
DWORD i;
for (i = 0; i < blob->cbData; i++)
{
blob->pbData[i] = *(pbEncoded + 1 + lenBytes +
dataLen - i - 1);
}
}
}
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeInteger(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
DWORD bytesNeeded;
if (pbEncoded[0] != ASN_INTEGER)
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
else
ret = CRYPT_AsnDecodeIntegerInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL);
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
CRYPT_INTEGER_BLOB *blob;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
blob->pbData = (BYTE *)pvStructInfo +
sizeof(CRYPT_INTEGER_BLOB);
ret = CRYPT_AsnDecodeIntegerInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeUnsignedIntegerInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
if (pbEncoded[0] == ASN_INTEGER)
{
DWORD bytesNeeded, dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
bytesNeeded = dataLen + sizeof(CRYPT_INTEGER_BLOB);
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
CRYPT_INTEGER_BLOB *blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
*pcbStructInfo = bytesNeeded;
blob->cbData = dataLen;
assert(blob->pbData);
/* remove leading zero byte if it exists */
if (blob->cbData && *(pbEncoded + 1 + lenBytes) == 0)
{
blob->cbData--;
blob->pbData++;
}
if (blob->cbData)
{
DWORD i;
for (i = 0; i < blob->cbData; i++)
{
blob->pbData[i] = *(pbEncoded + 1 + lenBytes +
dataLen - i - 1);
}
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeUnsignedInteger(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
DWORD bytesNeeded;
if ((ret = CRYPT_AsnDecodeUnsignedIntegerInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL)))
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
CRYPT_INTEGER_BLOB *blob;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
blob->pbData = (BYTE *)pvStructInfo +
sizeof(CRYPT_INTEGER_BLOB);
ret = CRYPT_AsnDecodeUnsignedIntegerInternal(pbEncoded,
cbEncoded, dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeEnumerated(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
if (!pvStructInfo)
{
*pcbStructInfo = sizeof(int);
return TRUE;
}
__TRY
{
if (pbEncoded[0] == ASN_ENUMERATED)
{
unsigned int val = 0, i;
if (cbEncoded <= 1)
{
SetLastError(CRYPT_E_ASN1_EOD);
ret = FALSE;
}
else if (pbEncoded[1] == 0)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
{
/* A little strange looking, but we have to accept a sign byte:
* 0xffffffff gets encoded as 0a 05 00 ff ff ff ff. Also,
* assuming a small length is okay here, it has to be in short
* form.
*/
if (pbEncoded[1] > sizeof(unsigned int) + 1)
{
SetLastError(CRYPT_E_ASN1_LARGE);
return FALSE;
}
for (i = 0; i < pbEncoded[1]; i++)
{
val <<= 8;
val |= pbEncoded[2 + i];
}
if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, sizeof(unsigned int))))
{
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
memcpy(pvStructInfo, &val, sizeof(unsigned int));
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
/* Modifies word, pbEncoded, and len, and magically sets a value ret to FALSE
* if it fails.
*/
#define CRYPT_TIME_GET_DIGITS(pbEncoded, len, numDigits, word) \
do { \
BYTE i; \
\
(word) = 0; \
for (i = 0; (len) > 0 && i < (numDigits); i++, (len)--) \
{ \
if (!isdigit(*(pbEncoded))) \
{ \
SetLastError(CRYPT_E_ASN1_CORRUPT); \
ret = FALSE; \
} \
else \
{ \
(word) *= 10; \
(word) += *(pbEncoded)++ - '0'; \
} \
} \
} while (0)
static BOOL CRYPT_AsnDecodeTimeZone(const BYTE *pbEncoded, DWORD len,
SYSTEMTIME *sysTime)
{
BOOL ret = TRUE;
if (len >= 3 && (*pbEncoded == '+' || *pbEncoded == '-'))
{
WORD hours, minutes = 0;
BYTE sign = *pbEncoded++;
len--;
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, hours);
if (ret && hours >= 24)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else if (len >= 2)
{
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, minutes);
if (ret && minutes >= 60)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
}
if (ret)
{
if (sign == '+')
{
sysTime->wHour += hours;
sysTime->wMinute += minutes;
}
else
{
if (hours > sysTime->wHour)
{
sysTime->wDay--;
sysTime->wHour = 24 - (hours - sysTime->wHour);
}
else
sysTime->wHour -= hours;
if (minutes > sysTime->wMinute)
{
sysTime->wHour--;
sysTime->wMinute = 60 - (minutes - sysTime->wMinute);
}
else
sysTime->wMinute -= minutes;
}
}
}
return ret;
}
#define MIN_ENCODED_TIME_LENGTH 10
static BOOL CRYPT_AsnDecodeUtcTimeInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = FALSE;
if (pbEncoded[0] == ASN_UTCTIME)
{
if (cbEncoded <= 1)
SetLastError(CRYPT_E_ASN1_EOD);
else if (pbEncoded[1] > 0x7f)
{
/* long-form date strings really can't be valid */
SetLastError(CRYPT_E_ASN1_CORRUPT);
}
else
{
SYSTEMTIME sysTime = { 0 };
BYTE len = pbEncoded[1];
if (len < MIN_ENCODED_TIME_LENGTH)
SetLastError(CRYPT_E_ASN1_CORRUPT);
else
{
ret = TRUE;
if (pcbDecoded)
*pcbDecoded = 2 + len;
pbEncoded += 2;
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wYear);
if (sysTime.wYear >= 50)
sysTime.wYear += 1900;
else
sysTime.wYear += 2000;
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wMonth);
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wDay);
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wHour);
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wMinute);
if (ret && len > 0)
{
if (len >= 2 && isdigit(*pbEncoded) &&
isdigit(*(pbEncoded + 1)))
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2,
sysTime.wSecond);
else if (isdigit(*pbEncoded))
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 1,
sysTime.wSecond);
if (ret)
ret = CRYPT_AsnDecodeTimeZone(pbEncoded, len,
&sysTime);
}
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = sizeof(FILETIME);
else if ((ret = CRYPT_DecodeCheckSpace(pcbStructInfo,
sizeof(FILETIME))))
ret = SystemTimeToFileTime(&sysTime,
(FILETIME *)pvStructInfo);
}
}
}
}
else
SetLastError(CRYPT_E_ASN1_BADTAG);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeUtcTime(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
__TRY
{
DWORD bytesNeeded;
ret = CRYPT_AsnDecodeUtcTimeInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL);
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, bytesNeeded)))
{
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
ret = CRYPT_AsnDecodeUtcTimeInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeGeneralizedTime(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = FALSE;
if (pbEncoded[0] == ASN_GENERALTIME)
{
if (cbEncoded <= 1)
SetLastError(CRYPT_E_ASN1_EOD);
else if (pbEncoded[1] > 0x7f)
{
/* long-form date strings really can't be valid */
SetLastError(CRYPT_E_ASN1_CORRUPT);
}
else
{
BYTE len = pbEncoded[1];
if (len < MIN_ENCODED_TIME_LENGTH)
SetLastError(CRYPT_E_ASN1_CORRUPT);
else
{
SYSTEMTIME sysTime = { 0 };
ret = TRUE;
if (pcbDecoded)
*pcbDecoded = 2 + len;
pbEncoded += 2;
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 4, sysTime.wYear);
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wMonth);
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wDay);
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2, sysTime.wHour);
if (ret && len > 0)
{
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2,
sysTime.wMinute);
if (ret && len > 0)
CRYPT_TIME_GET_DIGITS(pbEncoded, len, 2,
sysTime.wSecond);
if (ret && len > 0 && (*pbEncoded == '.' ||
*pbEncoded == ','))
{
BYTE digits;
pbEncoded++;
len--;
/* workaround macro weirdness */
digits = min(len, 3);
CRYPT_TIME_GET_DIGITS(pbEncoded, len, digits,
sysTime.wMilliseconds);
}
if (ret)
ret = CRYPT_AsnDecodeTimeZone(pbEncoded, len,
&sysTime);
}
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = sizeof(FILETIME);
else if ((ret = CRYPT_DecodeCheckSpace(pcbStructInfo,
sizeof(FILETIME))))
ret = SystemTimeToFileTime(&sysTime,
(FILETIME *)pvStructInfo);
}
}
}
}
else
SetLastError(CRYPT_E_ASN1_BADTAG);
return ret;
}
static BOOL CRYPT_AsnDecodeChoiceOfTimeInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
InternalDecodeFunc decode = NULL;
if (pbEncoded[0] == ASN_UTCTIME)
decode = CRYPT_AsnDecodeUtcTimeInternal;
else if (pbEncoded[0] == ASN_GENERALTIME)
decode = CRYPT_AsnDecodeGeneralizedTime;
if (decode)
ret = decode(pbEncoded, cbEncoded, dwFlags, pvStructInfo,
pcbStructInfo, pcbDecoded);
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeChoiceOfTime(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
__TRY
{
DWORD bytesNeeded;
ret = CRYPT_AsnDecodeChoiceOfTimeInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &bytesNeeded, NULL);
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
ret = CRYPT_AsnDecodeChoiceOfTimeInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
&bytesNeeded, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeSequenceOfAny(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
__TRY
{
if (pbEncoded[0] == ASN_SEQUENCEOF)
{
DWORD bytesNeeded, dataLen, remainingLen, cValue;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes;
const BYTE *ptr;
lenBytes = GET_LEN_BYTES(pbEncoded[1]);
bytesNeeded = sizeof(CRYPT_SEQUENCE_OF_ANY);
cValue = 0;
ptr = pbEncoded + 1 + lenBytes;
remainingLen = dataLen;
while (ret && remainingLen)
{
DWORD nextLen;
ret = CRYPT_GetLen(ptr, remainingLen, &nextLen);
if (ret)
{
DWORD nextLenBytes = GET_LEN_BYTES(ptr[1]);
remainingLen -= 1 + nextLenBytes + nextLen;
ptr += 1 + nextLenBytes + nextLen;
bytesNeeded += sizeof(CRYPT_DER_BLOB);
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += 1 + nextLenBytes + nextLen;
cValue++;
}
}
if (ret)
{
CRYPT_SEQUENCE_OF_ANY *seq;
BYTE *nextPtr;
DWORD i;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
seq = (CRYPT_SEQUENCE_OF_ANY *)pvStructInfo;
seq->cValue = cValue;
seq->rgValue = (CRYPT_DER_BLOB *)((BYTE *)seq +
sizeof(*seq));
nextPtr = (BYTE *)seq->rgValue +
cValue * sizeof(CRYPT_DER_BLOB);
ptr = pbEncoded + 1 + lenBytes;
remainingLen = dataLen;
i = 0;
while (ret && remainingLen)
{
DWORD nextLen;
ret = CRYPT_GetLen(ptr, remainingLen, &nextLen);
if (ret)
{
DWORD nextLenBytes = GET_LEN_BYTES(ptr[1]);
seq->rgValue[i].cbData = 1 + nextLenBytes +
nextLen;
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
seq->rgValue[i].pbData = (BYTE *)ptr;
else
{
seq->rgValue[i].pbData = nextPtr;
memcpy(nextPtr, ptr, 1 + nextLenBytes +
nextLen);
nextPtr += 1 + nextLenBytes + nextLen;
}
remainingLen -= 1 + nextLenBytes + nextLen;
ptr += 1 + nextLenBytes + nextLen;
i++;
}
}
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeDistPointName(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
if (pbEncoded[0] == (ASN_CONTEXT | ASN_CONSTRUCTOR | 0))
{
DWORD bytesNeeded, dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
struct AsnArrayDescriptor arrayDesc = {
ASN_CONTEXT | ASN_CONSTRUCTOR | 0, CRYPT_AsnDecodeAltNameEntry,
sizeof(CERT_ALT_NAME_ENTRY), TRUE,
offsetof(CERT_ALT_NAME_ENTRY, u.pwszURL) };
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD nameLen;
if (dataLen)
{
ret = CRYPT_AsnDecodeArray(&arrayDesc,
pbEncoded + 1 + lenBytes, cbEncoded - 1 - lenBytes,
0, NULL, NULL, &nameLen, NULL, NULL);
/* The CERT_ALT_NAME_INFO's size is included by CRYPT_AsnDecodeArray
* as the sizeof(struct GenericArray), so don't include it in the
* total bytes needed.
*/
bytesNeeded = sizeof(CRL_DIST_POINT_NAME) + nameLen -
sizeof(CERT_ALT_NAME_INFO);
}
else
bytesNeeded = sizeof(CRL_DIST_POINT_NAME);
if (pcbDecoded)
*pcbDecoded = 1 + lenBytes + dataLen;
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
CRL_DIST_POINT_NAME *name = (CRL_DIST_POINT_NAME *)pvStructInfo;
*pcbStructInfo = bytesNeeded;
if (dataLen)
{
name->dwDistPointNameChoice = CRL_DIST_POINT_FULL_NAME;
ret = CRYPT_AsnDecodeArray(&arrayDesc,
pbEncoded + 1 + lenBytes, cbEncoded - 1 - lenBytes,
0, NULL, &name->u.FullName, &nameLen, NULL,
name->u.FullName.rgAltEntry);
}
else
name->dwDistPointNameChoice = CRL_DIST_POINT_NO_NAME;
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
return ret;
}
static BOOL CRYPT_AsnDecodeDistPoint(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 0, offsetof(CRL_DIST_POINT,
DistPointName), CRYPT_AsnDecodeDistPointName,
sizeof(CRL_DIST_POINT_NAME), TRUE, TRUE, offsetof(CRL_DIST_POINT,
DistPointName.u.FullName.rgAltEntry), 0 },
{ ASN_CONTEXT | 1, offsetof(CRL_DIST_POINT, ReasonFlags),
CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
offsetof(CRL_DIST_POINT, ReasonFlags.pbData), 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 2, offsetof(CRL_DIST_POINT, CRLIssuer),
CRYPT_AsnDecodeAltNameInternal, sizeof(CERT_ALT_NAME_INFO), TRUE, TRUE,
offsetof(CRL_DIST_POINT, CRLIssuer.rgAltEntry), 0 },
};
BOOL ret;
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCRLDistPoints(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
CRYPT_AsnDecodeDistPoint, sizeof(CRL_DIST_POINT), TRUE,
offsetof(CRL_DIST_POINT, DistPointName.u.FullName.rgAltEntry) };
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeEnhancedKeyUsage(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnArrayDescriptor arrayDesc = { ASN_SEQUENCEOF,
CRYPT_AsnDecodeOidInternal, sizeof(LPSTR), TRUE, 0 };
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeIssuingDistPoint(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 0, offsetof(CRL_ISSUING_DIST_POINT,
DistPointName), CRYPT_AsnDecodeDistPointName,
sizeof(CRL_DIST_POINT_NAME), TRUE, TRUE,
offsetof(CRL_ISSUING_DIST_POINT,
DistPointName.u.FullName.rgAltEntry), 0 },
{ ASN_CONTEXT | 1, offsetof(CRL_ISSUING_DIST_POINT,
fOnlyContainsUserCerts), CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE,
FALSE, 0 },
{ ASN_CONTEXT | 2, offsetof(CRL_ISSUING_DIST_POINT,
fOnlyContainsCACerts), CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE,
FALSE, 0 },
{ ASN_CONTEXT | 3, offsetof(CRL_ISSUING_DIST_POINT,
OnlySomeReasonFlags), CRYPT_AsnDecodeBitsInternal,
sizeof(CRYPT_BIT_BLOB), TRUE, TRUE, offsetof(CRL_ISSUING_DIST_POINT,
OnlySomeReasonFlags.pbData), 0 },
{ ASN_CONTEXT | 4, offsetof(CRL_ISSUING_DIST_POINT,
fIndirectCRL), CRYPT_AsnDecodeBool, sizeof(BOOL), TRUE, FALSE, 0 },
};
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeMaximum(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = FALSE;
TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
if (pbEncoded[0] != (ASN_CONTEXT | 1))
{
SetLastError(CRYPT_E_ASN1_BADTAG);
return FALSE;
}
/* The BOOL is implicit: if the integer is present, then it's TRUE */
ret = CRYPT_AsnDecodeIntInternal(pbEncoded, cbEncoded, dwFlags,
pvStructInfo ? (BYTE *)pvStructInfo + sizeof(BOOL) : NULL, pcbStructInfo,
pcbDecoded);
if (ret && pvStructInfo)
*(BOOL *)pvStructInfo = TRUE;
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodeSubtree(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ 0, offsetof(CERT_GENERAL_SUBTREE, Base),
CRYPT_AsnDecodeAltNameEntry, sizeof(CERT_ALT_NAME_ENTRY), TRUE, TRUE,
offsetof(CERT_ALT_NAME_ENTRY, u.pwszURL), 0 },
{ ASN_CONTEXT | 0, offsetof(CERT_GENERAL_SUBTREE, dwMinimum),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), TRUE, FALSE, 0, 0 },
{ ASN_CONTEXT | 1, offsetof(CERT_GENERAL_SUBTREE, fMaximum),
CRYPT_AsnDecodeMaximum, sizeof(BOOL) + sizeof(DWORD), TRUE, FALSE, 0,
0 },
};
CERT_GENERAL_SUBTREE *subtree = (CERT_GENERAL_SUBTREE *)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, subtree ? (BYTE *)subtree->Base.u.pwszURL : NULL);
if (pcbDecoded)
{
TRACE("%d\n", *pcbDecoded);
if (*pcbDecoded < cbEncoded)
TRACE("%02x %02x\n", *(pbEncoded + *pcbDecoded),
*(pbEncoded + *pcbDecoded + 1));
}
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodeSubtreeArray(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret = TRUE;
struct AsnArrayDescriptor arrayDesc = { 0,
CRYPT_AsnDecodeSubtree, sizeof(CERT_GENERAL_SUBTREE), TRUE,
offsetof(CERT_GENERAL_SUBTREE, Base.u.pwszURL) };
struct GenericArray *array = (struct GenericArray *)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
array ? array->rgItems : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeNameConstraints(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 0,
offsetof(CERT_NAME_CONSTRAINTS_INFO, cPermittedSubtree),
CRYPT_AsnDecodeSubtreeArray, sizeof(struct GenericArray), TRUE, TRUE,
offsetof(CERT_NAME_CONSTRAINTS_INFO, rgPermittedSubtree), 0 },
{ ASN_CONTEXT | ASN_CONSTRUCTOR | 1,
offsetof(CERT_NAME_CONSTRAINTS_INFO, cExcludedSubtree),
CRYPT_AsnDecodeSubtreeArray, sizeof(struct GenericArray), TRUE, TRUE,
offsetof(CERT_NAME_CONSTRAINTS_INFO, rgExcludedSubtree), 0 },
};
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, NULL, NULL);
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeIssuerSerialNumber(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ 0, offsetof(CERT_ISSUER_SERIAL_NUMBER, Issuer), CRYPT_AsnDecodeDerBlob,
sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CERT_ISSUER_SERIAL_NUMBER,
Issuer.pbData) },
{ ASN_INTEGER, offsetof(CERT_ISSUER_SERIAL_NUMBER, SerialNumber),
CRYPT_AsnDecodeIntegerInternal, sizeof(CRYPT_INTEGER_BLOB), FALSE,
TRUE, offsetof(CERT_ISSUER_SERIAL_NUMBER, SerialNumber.pbData), 0 },
};
CERT_ISSUER_SERIAL_NUMBER *issuerSerial =
(CERT_ISSUER_SERIAL_NUMBER *)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, issuerSerial ? issuerSerial->Issuer.pbData : NULL);
if (ret && issuerSerial && !issuerSerial->SerialNumber.cbData)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodePKCSSignerInfoInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
CMSG_SIGNER_INFO *info = (CMSG_SIGNER_INFO *)pvStructInfo;
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CMSG_SIGNER_INFO, dwVersion),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
{ ASN_SEQUENCEOF, offsetof(CMSG_SIGNER_INFO, Issuer),
CRYPT_AsnDecodeIssuerSerialNumber, sizeof(CERT_ISSUER_SERIAL_NUMBER),
FALSE, TRUE, offsetof(CMSG_SIGNER_INFO, Issuer.pbData), 0 },
{ ASN_SEQUENCEOF, offsetof(CMSG_SIGNER_INFO, HashAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CMSG_SIGNER_INFO, HashAlgorithm.pszObjId), 0 },
{ ASN_CONSTRUCTOR | ASN_CONTEXT | 0,
offsetof(CMSG_SIGNER_INFO, AuthAttrs),
CRYPT_AsnDecodePKCSAttributesInternal, sizeof(CRYPT_ATTRIBUTES),
TRUE, TRUE, offsetof(CMSG_SIGNER_INFO, AuthAttrs.rgAttr), 0 },
{ ASN_SEQUENCEOF, offsetof(CMSG_SIGNER_INFO, HashEncryptionAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CMSG_SIGNER_INFO,
HashEncryptionAlgorithm.pszObjId), 0 },
{ ASN_OCTETSTRING, offsetof(CMSG_SIGNER_INFO, EncryptedHash),
CRYPT_AsnDecodeOctetsInternal, sizeof(CRYPT_DER_BLOB),
FALSE, TRUE, offsetof(CMSG_SIGNER_INFO, EncryptedHash.pbData), 0 },
{ ASN_CONSTRUCTOR | ASN_CONTEXT | 1,
offsetof(CMSG_SIGNER_INFO, UnauthAttrs),
CRYPT_AsnDecodePKCSAttributesInternal, sizeof(CRYPT_ATTRIBUTES),
TRUE, TRUE, offsetof(CMSG_SIGNER_INFO, UnauthAttrs.rgAttr), 0 },
};
BOOL ret;
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, info ? info->Issuer.pbData : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodePKCSSignerInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
ret = CRYPT_AsnDecodePKCSSignerInfoInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
if (ret && pvStructInfo)
{
ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, *pcbStructInfo);
if (ret)
{
CMSG_SIGNER_INFO *info;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
info = (CMSG_SIGNER_INFO *)pvStructInfo;
info->Issuer.pbData = ((BYTE *)info +
sizeof(CMSG_SIGNER_INFO));
ret = CRYPT_AsnDecodePKCSSignerInfoInternal(pbEncoded,
cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
pcbStructInfo, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_AsnDecodeCMSSignerId(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
CERT_ID *id = (CERT_ID *)pvStructInfo;
BOOL ret = FALSE;
if (*pbEncoded == ASN_SEQUENCEOF)
{
ret = CRYPT_AsnDecodeIssuerSerialNumber(pbEncoded, cbEncoded, dwFlags,
id ? &id->u.IssuerSerialNumber : NULL, pcbStructInfo, pcbDecoded);
if (ret)
{
if (id)
id->dwIdChoice = CERT_ID_ISSUER_SERIAL_NUMBER;
if (*pcbStructInfo > sizeof(CERT_ISSUER_SERIAL_NUMBER))
*pcbStructInfo = sizeof(CERT_ID) + *pcbStructInfo -
sizeof(CERT_ISSUER_SERIAL_NUMBER);
else
*pcbStructInfo = sizeof(CERT_ID);
}
}
else if (*pbEncoded == (ASN_CONTEXT | 0))
{
ret = CRYPT_AsnDecodeOctetsInternal(pbEncoded, cbEncoded, dwFlags,
id ? &id->u.KeyId : NULL, pcbStructInfo, pcbDecoded);
if (ret)
{
if (id)
id->dwIdChoice = CERT_ID_KEY_IDENTIFIER;
if (*pcbStructInfo > sizeof(CRYPT_DATA_BLOB))
*pcbStructInfo = sizeof(CERT_ID) + *pcbStructInfo -
sizeof(CRYPT_DATA_BLOB);
else
*pcbStructInfo = sizeof(CERT_ID);
}
}
else
SetLastError(CRYPT_E_ASN1_BADTAG);
return ret;
}
static BOOL CRYPT_AsnDecodeCMSSignerInfoInternal(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
DWORD *pcbDecoded)
{
CMSG_CMS_SIGNER_INFO *info = (CMSG_CMS_SIGNER_INFO *)pvStructInfo;
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CMSG_CMS_SIGNER_INFO, dwVersion),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
{ 0, offsetof(CMSG_CMS_SIGNER_INFO, SignerId),
CRYPT_AsnDecodeCMSSignerId, sizeof(CERT_ID), FALSE, TRUE,
offsetof(CMSG_CMS_SIGNER_INFO, SignerId.u.KeyId.pbData), 0 },
{ ASN_SEQUENCEOF, offsetof(CMSG_CMS_SIGNER_INFO, HashAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CMSG_CMS_SIGNER_INFO, HashAlgorithm.pszObjId), 0 },
{ ASN_CONSTRUCTOR | ASN_CONTEXT | 0,
offsetof(CMSG_CMS_SIGNER_INFO, AuthAttrs),
CRYPT_AsnDecodePKCSAttributesInternal, sizeof(CRYPT_ATTRIBUTES),
TRUE, TRUE, offsetof(CMSG_CMS_SIGNER_INFO, AuthAttrs.rgAttr), 0 },
{ ASN_SEQUENCEOF, offsetof(CMSG_CMS_SIGNER_INFO, HashEncryptionAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CMSG_CMS_SIGNER_INFO,
HashEncryptionAlgorithm.pszObjId), 0 },
{ ASN_OCTETSTRING, offsetof(CMSG_CMS_SIGNER_INFO, EncryptedHash),
CRYPT_AsnDecodeOctetsInternal, sizeof(CRYPT_DER_BLOB),
FALSE, TRUE, offsetof(CMSG_CMS_SIGNER_INFO, EncryptedHash.pbData), 0 },
{ ASN_CONSTRUCTOR | ASN_CONTEXT | 1,
offsetof(CMSG_CMS_SIGNER_INFO, UnauthAttrs),
CRYPT_AsnDecodePKCSAttributesInternal, sizeof(CRYPT_ATTRIBUTES),
TRUE, TRUE, offsetof(CMSG_CMS_SIGNER_INFO, UnauthAttrs.rgAttr), 0 },
};
BOOL ret;
TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo,
pcbDecoded, info ? info->SignerId.u.KeyId.pbData : NULL);
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCMSSignerInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
ret = CRYPT_AsnDecodeCMSSignerInfoInternal(pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pcbStructInfo, NULL);
if (ret && pvStructInfo)
{
ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo, *pcbStructInfo);
if (ret)
{
CMSG_CMS_SIGNER_INFO *info;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
info = (CMSG_CMS_SIGNER_INFO *)pvStructInfo;
info->SignerId.u.KeyId.pbData = ((BYTE *)info +
sizeof(CMSG_CMS_SIGNER_INFO));
ret = CRYPT_AsnDecodeCMSSignerInfoInternal(pbEncoded,
cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, pvStructInfo,
pcbStructInfo, NULL);
}
}
}
__EXCEPT_PAGE_FAULT
{
SetLastError(STATUS_ACCESS_VIOLATION);
}
__ENDTRY
TRACE("returning %d\n", ret);
return ret;
}
static BOOL CRYPT_DecodeSignerArray(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo, DWORD *pcbDecoded)
{
BOOL ret;
struct AsnArrayDescriptor arrayDesc = { ASN_CONSTRUCTOR | ASN_SETOF,
CRYPT_AsnDecodeCMSSignerInfoInternal, sizeof(CMSG_CMS_SIGNER_INFO), TRUE,
offsetof(CMSG_CMS_SIGNER_INFO, SignerId.u.KeyId.pbData) };
struct GenericArray *array = (struct GenericArray *)pvStructInfo;
TRACE("%p, %d, %08x, %p, %d, %p\n", pbEncoded, cbEncoded, dwFlags,
pvStructInfo, *pcbStructInfo, pcbDecoded);
ret = CRYPT_AsnDecodeArray(&arrayDesc, pbEncoded, cbEncoded, dwFlags,
NULL, pvStructInfo, pcbStructInfo, pcbDecoded,
array ? array->rgItems : NULL);
return ret;
}
BOOL CRYPT_AsnDecodeCMSSignedInfo(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
CRYPT_SIGNED_INFO *signedInfo, DWORD *pcbSignedInfo)
{
BOOL ret = FALSE;
struct AsnDecodeSequenceItem items[] = {
{ ASN_INTEGER, offsetof(CRYPT_SIGNED_INFO, version),
CRYPT_AsnDecodeIntInternal, sizeof(DWORD), FALSE, FALSE, 0, 0 },
/* Placeholder for the hash algorithms - redundant with those in the
* signers, so just ignore them.
*/
{ ASN_CONSTRUCTOR | ASN_SETOF, 0, NULL, 0, TRUE, FALSE, 0, 0 },
{ ASN_SEQUENCE, offsetof(CRYPT_SIGNED_INFO, content),
CRYPT_AsnDecodePKCSContentInfoInternal, sizeof(CRYPT_CONTENT_INFO),
FALSE, TRUE, offsetof(CRYPT_SIGNED_INFO, content.pszObjId), 0 },
{ ASN_CONSTRUCTOR | ASN_CONTEXT | 0,
offsetof(CRYPT_SIGNED_INFO, cCertEncoded),
CRYPT_DecodeDERArray, sizeof(struct GenericArray), TRUE, TRUE,
offsetof(CRYPT_SIGNED_INFO, rgCertEncoded), 0 },
{ ASN_CONSTRUCTOR | ASN_CONTEXT | 1,
offsetof(CRYPT_SIGNED_INFO, cCrlEncoded), CRYPT_DecodeDERArray,
sizeof(struct GenericArray), TRUE, TRUE,
offsetof(CRYPT_SIGNED_INFO, rgCrlEncoded), 0 },
{ ASN_CONSTRUCTOR | ASN_SETOF, offsetof(CRYPT_SIGNED_INFO, cSignerInfo),
CRYPT_DecodeSignerArray, sizeof(struct GenericArray), TRUE, TRUE,
offsetof(CRYPT_SIGNED_INFO, rgSignerInfo), 0 },
};
TRACE("%p, %d, %08x, %p, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, signedInfo, *pcbSignedInfo);
ret = CRYPT_AsnDecodeSequence(items, sizeof(items) / sizeof(items[0]),
pbEncoded, cbEncoded, dwFlags, pDecodePara, signedInfo, pcbSignedInfo,
NULL, NULL);
TRACE("returning %d\n", ret);
return ret;
}
static CryptDecodeObjectExFunc CRYPT_GetBuiltinDecoder(DWORD dwCertEncodingType,
LPCSTR lpszStructType)
{
CryptDecodeObjectExFunc decodeFunc = NULL;
if ((dwCertEncodingType & CERT_ENCODING_TYPE_MASK) != X509_ASN_ENCODING
&& (dwCertEncodingType & CMSG_ENCODING_TYPE_MASK) != PKCS_7_ASN_ENCODING)
{
SetLastError(ERROR_FILE_NOT_FOUND);
return NULL;
}
if (!HIWORD(lpszStructType))
{
switch (LOWORD(lpszStructType))
{
case LOWORD(X509_CERT):
decodeFunc = CRYPT_AsnDecodeCertSignedContent;
break;
case LOWORD(X509_CERT_TO_BE_SIGNED):
decodeFunc = CRYPT_AsnDecodeCert;
break;
case LOWORD(X509_CERT_CRL_TO_BE_SIGNED):
decodeFunc = CRYPT_AsnDecodeCRL;
break;
case LOWORD(X509_EXTENSIONS):
decodeFunc = CRYPT_AsnDecodeExtensions;
break;
case LOWORD(X509_NAME_VALUE):
decodeFunc = CRYPT_AsnDecodeNameValue;
break;
case LOWORD(X509_NAME):
decodeFunc = CRYPT_AsnDecodeName;
break;
case LOWORD(X509_PUBLIC_KEY_INFO):
decodeFunc = CRYPT_AsnDecodePubKeyInfo;
break;
case LOWORD(X509_AUTHORITY_KEY_ID):
decodeFunc = CRYPT_AsnDecodeAuthorityKeyId;
break;
case LOWORD(X509_ALTERNATE_NAME):
decodeFunc = CRYPT_AsnDecodeAltName;
break;
case LOWORD(X509_BASIC_CONSTRAINTS):
decodeFunc = CRYPT_AsnDecodeBasicConstraints;
break;
case LOWORD(X509_BASIC_CONSTRAINTS2):
decodeFunc = CRYPT_AsnDecodeBasicConstraints2;
break;
case LOWORD(RSA_CSP_PUBLICKEYBLOB):
decodeFunc = CRYPT_AsnDecodeRsaPubKey;
break;
case LOWORD(X509_UNICODE_NAME):
decodeFunc = CRYPT_AsnDecodeUnicodeName;
break;
case LOWORD(PKCS_ATTRIBUTE):
decodeFunc = CRYPT_AsnDecodePKCSAttribute;
break;
case LOWORD(X509_UNICODE_NAME_VALUE):
decodeFunc = CRYPT_AsnDecodeUnicodeNameValue;
break;
case LOWORD(X509_OCTET_STRING):
decodeFunc = CRYPT_AsnDecodeOctets;
break;
case LOWORD(X509_BITS):
case LOWORD(X509_KEY_USAGE):
decodeFunc = CRYPT_AsnDecodeBits;
break;
case LOWORD(X509_INTEGER):
decodeFunc = CRYPT_AsnDecodeInt;
break;
case LOWORD(X509_MULTI_BYTE_INTEGER):
decodeFunc = CRYPT_AsnDecodeInteger;
break;
case LOWORD(X509_MULTI_BYTE_UINT):
decodeFunc = CRYPT_AsnDecodeUnsignedInteger;
break;
case LOWORD(X509_ENUMERATED):
decodeFunc = CRYPT_AsnDecodeEnumerated;
break;
case LOWORD(X509_CHOICE_OF_TIME):
decodeFunc = CRYPT_AsnDecodeChoiceOfTime;
break;
case LOWORD(X509_AUTHORITY_KEY_ID2):
decodeFunc = CRYPT_AsnDecodeAuthorityKeyId2;
break;
case LOWORD(X509_AUTHORITY_INFO_ACCESS):
decodeFunc = CRYPT_AsnDecodeAuthorityInfoAccess;
break;
case LOWORD(PKCS_CONTENT_INFO):
decodeFunc = CRYPT_AsnDecodePKCSContentInfo;
break;
case LOWORD(X509_SEQUENCE_OF_ANY):
decodeFunc = CRYPT_AsnDecodeSequenceOfAny;
break;
case LOWORD(PKCS_UTC_TIME):
decodeFunc = CRYPT_AsnDecodeUtcTime;
break;
case LOWORD(X509_CRL_DIST_POINTS):
decodeFunc = CRYPT_AsnDecodeCRLDistPoints;
break;
case LOWORD(X509_ENHANCED_KEY_USAGE):
decodeFunc = CRYPT_AsnDecodeEnhancedKeyUsage;
break;
case LOWORD(PKCS_CTL):
decodeFunc = CRYPT_AsnDecodeCTL;
break;
case LOWORD(PKCS_SMIME_CAPABILITIES):
decodeFunc = CRYPT_AsnDecodeSMIMECapabilities;
break;
case LOWORD(PKCS_ATTRIBUTES):
decodeFunc = CRYPT_AsnDecodePKCSAttributes;
break;
case LOWORD(X509_ISSUING_DIST_POINT):
decodeFunc = CRYPT_AsnDecodeIssuingDistPoint;
break;
case LOWORD(X509_NAME_CONSTRAINTS):
decodeFunc = CRYPT_AsnDecodeNameConstraints;
break;
case LOWORD(PKCS7_SIGNER_INFO):
decodeFunc = CRYPT_AsnDecodePKCSSignerInfo;
break;
case LOWORD(CMS_SIGNER_INFO):
decodeFunc = CRYPT_AsnDecodeCMSSignerInfo;
break;
}
}
else if (!strcmp(lpszStructType, szOID_CERT_EXTENSIONS))
decodeFunc = CRYPT_AsnDecodeExtensions;
else if (!strcmp(lpszStructType, szOID_RSA_signingTime))
decodeFunc = CRYPT_AsnDecodeUtcTime;
else if (!strcmp(lpszStructType, szOID_RSA_SMIMECapabilities))
decodeFunc = CRYPT_AsnDecodeSMIMECapabilities;
else if (!strcmp(lpszStructType, szOID_AUTHORITY_KEY_IDENTIFIER))
decodeFunc = CRYPT_AsnDecodeAuthorityKeyId;
else if (!strcmp(lpszStructType, szOID_AUTHORITY_KEY_IDENTIFIER2))
decodeFunc = CRYPT_AsnDecodeAuthorityKeyId2;
else if (!strcmp(lpszStructType, szOID_CRL_REASON_CODE))
decodeFunc = CRYPT_AsnDecodeEnumerated;
else if (!strcmp(lpszStructType, szOID_KEY_USAGE))
decodeFunc = CRYPT_AsnDecodeBits;
else if (!strcmp(lpszStructType, szOID_SUBJECT_KEY_IDENTIFIER))
decodeFunc = CRYPT_AsnDecodeOctets;
else if (!strcmp(lpszStructType, szOID_BASIC_CONSTRAINTS))
decodeFunc = CRYPT_AsnDecodeBasicConstraints;
else if (!strcmp(lpszStructType, szOID_BASIC_CONSTRAINTS2))
decodeFunc = CRYPT_AsnDecodeBasicConstraints2;
else if (!strcmp(lpszStructType, szOID_ISSUER_ALT_NAME))
decodeFunc = CRYPT_AsnDecodeAltName;
else if (!strcmp(lpszStructType, szOID_ISSUER_ALT_NAME2))
decodeFunc = CRYPT_AsnDecodeAltName;
else if (!strcmp(lpszStructType, szOID_NEXT_UPDATE_LOCATION))
decodeFunc = CRYPT_AsnDecodeAltName;
else if (!strcmp(lpszStructType, szOID_SUBJECT_ALT_NAME))
decodeFunc = CRYPT_AsnDecodeAltName;
else if (!strcmp(lpszStructType, szOID_SUBJECT_ALT_NAME2))
decodeFunc = CRYPT_AsnDecodeAltName;
else if (!strcmp(lpszStructType, szOID_CRL_DIST_POINTS))
decodeFunc = CRYPT_AsnDecodeCRLDistPoints;
else if (!strcmp(lpszStructType, szOID_ENHANCED_KEY_USAGE))
decodeFunc = CRYPT_AsnDecodeEnhancedKeyUsage;
else if (!strcmp(lpszStructType, szOID_ISSUING_DIST_POINT))
decodeFunc = CRYPT_AsnDecodeIssuingDistPoint;
else if (!strcmp(lpszStructType, szOID_NAME_CONSTRAINTS))
decodeFunc = CRYPT_AsnDecodeNameConstraints;
else if (!strcmp(lpszStructType, szOID_AUTHORITY_INFO_ACCESS))
decodeFunc = CRYPT_AsnDecodeAuthorityInfoAccess;
else if (!strcmp(lpszStructType, szOID_CTL))
decodeFunc = CRYPT_AsnDecodeCTL;
return decodeFunc;
}
static CryptDecodeObjectFunc CRYPT_LoadDecoderFunc(DWORD dwCertEncodingType,
LPCSTR lpszStructType, HCRYPTOIDFUNCADDR *hFunc)
{
static HCRYPTOIDFUNCSET set = NULL;
CryptDecodeObjectFunc decodeFunc = NULL;
if (!set)
set = CryptInitOIDFunctionSet(CRYPT_OID_DECODE_OBJECT_FUNC, 0);
CryptGetOIDFunctionAddress(set, dwCertEncodingType, lpszStructType, 0,
(void **)&decodeFunc, hFunc);
return decodeFunc;
}
static CryptDecodeObjectExFunc CRYPT_LoadDecoderExFunc(DWORD dwCertEncodingType,
LPCSTR lpszStructType, HCRYPTOIDFUNCADDR *hFunc)
{
static HCRYPTOIDFUNCSET set = NULL;
CryptDecodeObjectExFunc decodeFunc = NULL;
if (!set)
set = CryptInitOIDFunctionSet(CRYPT_OID_DECODE_OBJECT_EX_FUNC, 0);
CryptGetOIDFunctionAddress(set, dwCertEncodingType, lpszStructType, 0,
(void **)&decodeFunc, hFunc);
return decodeFunc;
}
BOOL WINAPI CryptDecodeObject(DWORD dwCertEncodingType, LPCSTR lpszStructType,
const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo,
DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
CryptDecodeObjectFunc pCryptDecodeObject = NULL;
CryptDecodeObjectExFunc pCryptDecodeObjectEx = NULL;
HCRYPTOIDFUNCADDR hFunc = NULL;
TRACE_(crypt)("(0x%08x, %s, %p, %d, 0x%08x, %p, %p)\n", dwCertEncodingType,
debugstr_a(lpszStructType), pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pcbStructInfo);
if (!pvStructInfo && !pcbStructInfo)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
if (cbEncoded > MAX_ENCODED_LEN)
{
SetLastError(CRYPT_E_ASN1_LARGE);
return FALSE;
}
if (!(pCryptDecodeObjectEx = CRYPT_GetBuiltinDecoder(dwCertEncodingType,
lpszStructType)))
{
TRACE_(crypt)("OID %s not found or unimplemented, looking for DLL\n",
debugstr_a(lpszStructType));
pCryptDecodeObject = CRYPT_LoadDecoderFunc(dwCertEncodingType,
lpszStructType, &hFunc);
if (!pCryptDecodeObject)
pCryptDecodeObjectEx = CRYPT_LoadDecoderExFunc(dwCertEncodingType,
lpszStructType, &hFunc);
}
if (pCryptDecodeObject)
ret = pCryptDecodeObject(dwCertEncodingType, lpszStructType,
pbEncoded, cbEncoded, dwFlags, pvStructInfo, pcbStructInfo);
else if (pCryptDecodeObjectEx)
ret = pCryptDecodeObjectEx(dwCertEncodingType, lpszStructType,
pbEncoded, cbEncoded, dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL,
pvStructInfo, pcbStructInfo);
if (hFunc)
CryptFreeOIDFunctionAddress(hFunc, 0);
TRACE_(crypt)("returning %d\n", ret);
return ret;
}
BOOL WINAPI CryptDecodeObjectEx(DWORD dwCertEncodingType, LPCSTR lpszStructType,
const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
CryptDecodeObjectExFunc decodeFunc;
HCRYPTOIDFUNCADDR hFunc = NULL;
TRACE_(crypt)("(0x%08x, %s, %p, %d, 0x%08x, %p, %p, %p)\n",
dwCertEncodingType, debugstr_a(lpszStructType), pbEncoded,
cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
if (!pvStructInfo && !pcbStructInfo)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
if (!cbEncoded)
{
SetLastError(CRYPT_E_ASN1_EOD);
return FALSE;
}
if (cbEncoded > MAX_ENCODED_LEN)
{
SetLastError(CRYPT_E_ASN1_LARGE);
return FALSE;
}
SetLastError(NOERROR);
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG && pvStructInfo)
*(BYTE **)pvStructInfo = NULL;
decodeFunc = CRYPT_GetBuiltinDecoder(dwCertEncodingType, lpszStructType);
if (!decodeFunc)
{
TRACE_(crypt)("OID %s not found or unimplemented, looking for DLL\n",
debugstr_a(lpszStructType));
decodeFunc = CRYPT_LoadDecoderExFunc(dwCertEncodingType, lpszStructType,
&hFunc);
}
if (decodeFunc)
ret = decodeFunc(dwCertEncodingType, lpszStructType, pbEncoded,
cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
else
{
CryptDecodeObjectFunc pCryptDecodeObject =
CRYPT_LoadDecoderFunc(dwCertEncodingType, lpszStructType, &hFunc);
/* Try CryptDecodeObject function. Don't call CryptDecodeObject
* directly, as that could cause an infinite loop.
*/
if (pCryptDecodeObject)
{
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
{
ret = pCryptDecodeObject(dwCertEncodingType, lpszStructType,
pbEncoded, cbEncoded, dwFlags, NULL, pcbStructInfo);
if (ret && (ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, *pcbStructInfo)))
ret = pCryptDecodeObject(dwCertEncodingType,
lpszStructType, pbEncoded, cbEncoded, dwFlags,
*(BYTE **)pvStructInfo, pcbStructInfo);
}
else
ret = pCryptDecodeObject(dwCertEncodingType, lpszStructType,
pbEncoded, cbEncoded, dwFlags, pvStructInfo, pcbStructInfo);
}
}
if (hFunc)
CryptFreeOIDFunctionAddress(hFunc, 0);
TRACE_(crypt)("returning %d\n", ret);
return ret;
}
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