asn.c 75.4 KB
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/* wintrust asn functions
 *
 * Copyright 2007 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
 *
 */
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#include "config.h"
#include "wine/port.h"

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#include <stdarg.h>
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#include <stdio.h>
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#include <assert.h>
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#define NONAMELESSUNION
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "wincrypt.h"
#include "wintrust.h"
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#include "snmp.h"
#include "winternl.h"
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#include "wine/debug.h"
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#include "wine/exception.h"
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WINE_DEFAULT_DEBUG_CHANNEL(cryptasn);

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#ifdef WORDS_BIGENDIAN

#define hton16(x) (x)
#define n16toh(x) (x)

#else

#define hton16(x) RtlUshortByteSwap(x)
#define n16toh(x) RtlUshortByteSwap(x)

#endif

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#define ASN_BOOL            (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x01)
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#define ASN_BITSTRING       (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x03)
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#define ASN_BMPSTRING       (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x1e)
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static BOOL CRYPT_EncodeLen(DWORD len, BYTE *pbEncoded, DWORD *pcbEncoded)
{
    DWORD bytesNeeded, significantBytes = 0;

    if (len <= 0x7f)
        bytesNeeded = 1;
    else
    {
        DWORD temp;

        for (temp = len, significantBytes = sizeof(temp); !(temp & 0xff000000);
         temp <<= 8, significantBytes--)
            ;
        bytesNeeded = significantBytes + 1;
    }
    if (!pbEncoded)
    {
        *pcbEncoded = bytesNeeded;
        return TRUE;
    }
    if (*pcbEncoded < bytesNeeded)
    {
        SetLastError(ERROR_MORE_DATA);
        return FALSE;
    }
    if (len <= 0x7f)
        *pbEncoded = (BYTE)len;
    else
    {
        DWORD i;

        *pbEncoded++ = significantBytes | 0x80;
        for (i = 0; i < significantBytes; i++)
        {
            *(pbEncoded + significantBytes - i - 1) = (BYTE)(len & 0xff);
            len >>= 8;
        }
    }
    *pcbEncoded = bytesNeeded;
    return TRUE;
}

static BOOL WINAPI CRYPT_AsnEncodeOctets(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
    BOOL ret = TRUE;
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    const CRYPT_DATA_BLOB *blob = pvStructInfo;
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    DWORD bytesNeeded, lenBytes;

    TRACE("(%d, %p), %p, %d\n", blob->cbData, blob->pbData, pbEncoded,
     *pcbEncoded);

    CRYPT_EncodeLen(blob->cbData, NULL, &lenBytes);
    bytesNeeded = 1 + lenBytes + blob->cbData;
    if (!pbEncoded)
        *pcbEncoded = bytesNeeded;
    else if (*pcbEncoded < bytesNeeded)
    {
        *pcbEncoded = bytesNeeded;
        SetLastError(ERROR_MORE_DATA);
        ret = FALSE;
    }
    else
    {
        *pbEncoded++ = ASN_OCTETSTRING;
        CRYPT_EncodeLen(blob->cbData, pbEncoded, &lenBytes);
        pbEncoded += lenBytes;
        if (blob->cbData)
            memcpy(pbEncoded, blob->pbData, blob->cbData);
    }
    TRACE("returning %d\n", ret);
    return ret;
}

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BOOL WINAPI WVTAsn1SpcLinkEncode(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
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    BOOL ret = FALSE;

    TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
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     debugstr_a(lpszStructType), pvStructInfo, pbEncoded,
     pcbEncoded);
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    __TRY
    {
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        const SPC_LINK *link = pvStructInfo;
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        DWORD bytesNeeded, lenBytes;

        switch (link->dwLinkChoice)
        {
        case SPC_FILE_LINK_CHOICE:
        {
            DWORD fileNameLen, fileNameLenBytes;
            LPWSTR ptr;

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            fileNameLen = link->u.pwszFile ?
             lstrlenW(link->u.pwszFile) * sizeof(WCHAR) : 0;
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            CRYPT_EncodeLen(fileNameLen, NULL, &fileNameLenBytes);
            CRYPT_EncodeLen(1 + fileNameLenBytes + fileNameLen, NULL,
             &lenBytes);
            bytesNeeded = 2 + lenBytes + fileNameLenBytes + fileNameLen;
            if (!pbEncoded)
            {
                *pcbEncoded = bytesNeeded;
                ret = TRUE;
            }
            else if (*pcbEncoded < bytesNeeded)
            {
                SetLastError(ERROR_MORE_DATA);
                *pcbEncoded = bytesNeeded;
            }
            else
            {
                *pcbEncoded = bytesNeeded;
                *pbEncoded++ = ASN_CONSTRUCTOR | ASN_CONTEXT | 2;
                CRYPT_EncodeLen(1 + fileNameLenBytes + fileNameLen, pbEncoded,
                 &lenBytes);
                pbEncoded += lenBytes;
                *pbEncoded++ = ASN_CONTEXT;
                CRYPT_EncodeLen(fileNameLen, pbEncoded, &fileNameLenBytes);
                pbEncoded += fileNameLenBytes;
                for (ptr = link->u.pwszFile; ptr && *ptr; ptr++)
                {
                    *(WCHAR *)pbEncoded = hton16(*ptr);
                    pbEncoded += sizeof(WCHAR);
                }
                ret = TRUE;
            }
            break;
        }
        case SPC_MONIKER_LINK_CHOICE:
        {
            DWORD classIdLenBytes, dataLenBytes, dataLen;
            CRYPT_DATA_BLOB classId = { sizeof(link->u.Moniker.ClassId),
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             (BYTE *)link->u.Moniker.ClassId };
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            CRYPT_EncodeLen(classId.cbData, NULL, &classIdLenBytes);
            CRYPT_EncodeLen(link->u.Moniker.SerializedData.cbData, NULL,
             &dataLenBytes);
            dataLen = 2 + classIdLenBytes + classId.cbData +
             dataLenBytes + link->u.Moniker.SerializedData.cbData;
            CRYPT_EncodeLen(dataLen, NULL, &lenBytes);
            bytesNeeded = 1 + dataLen + lenBytes;
            if (!pbEncoded)
            {
                *pcbEncoded = bytesNeeded;
                ret = TRUE;
            }
            else if (*pcbEncoded < bytesNeeded)
            {
                SetLastError(ERROR_MORE_DATA);
                *pcbEncoded = bytesNeeded;
            }
            else
            {
                DWORD size;

                *pcbEncoded = bytesNeeded;
                *pbEncoded++ = ASN_CONSTRUCTOR | ASN_CONTEXT | 1;
                CRYPT_EncodeLen(dataLen, pbEncoded, &lenBytes);
                pbEncoded += lenBytes;
                size = 1 + classIdLenBytes + classId.cbData;
                CRYPT_AsnEncodeOctets(X509_ASN_ENCODING, NULL, &classId,
                 pbEncoded, &size);
                pbEncoded += size;
                size = 1 + dataLenBytes + link->u.Moniker.SerializedData.cbData;
                CRYPT_AsnEncodeOctets(X509_ASN_ENCODING, NULL,
                 &link->u.Moniker.SerializedData, pbEncoded, &size);
                pbEncoded += size;
                ret = TRUE;
            }
            break;
        }
        case SPC_URL_LINK_CHOICE:
        {
            LPWSTR ptr;
            DWORD urlLen;

            /* Check for invalid characters in URL */
            ret = TRUE;
            urlLen = 0;
            for (ptr = link->u.pwszUrl; ptr && *ptr && ret; ptr++)
                if (*ptr > 0x7f)
                {
                    *pcbEncoded = 0;
                    SetLastError(CRYPT_E_INVALID_IA5_STRING);
                    ret = FALSE;
                }
                else
                    urlLen++;
            if (ret)
            {
                CRYPT_EncodeLen(urlLen, NULL, &lenBytes);
                bytesNeeded = 1 + lenBytes + urlLen;
                if (!pbEncoded)
                    *pcbEncoded = bytesNeeded;
                else if (*pcbEncoded < bytesNeeded)
                {
                    SetLastError(ERROR_MORE_DATA);
                    *pcbEncoded = bytesNeeded;
                    ret = FALSE;
                }
                else
                {
                    *pcbEncoded = bytesNeeded;
                    *pbEncoded++ = ASN_CONTEXT;
                    CRYPT_EncodeLen(urlLen, pbEncoded, &lenBytes);
                    pbEncoded += lenBytes;
                    for (ptr = link->u.pwszUrl; ptr && *ptr; ptr++)
                        *pbEncoded++ = (BYTE)*ptr;
                }
            }
            break;
        }
        default:
            SetLastError(E_INVALIDARG);
        }
    }
    __EXCEPT_PAGE_FAULT
    {
        SetLastError(STATUS_ACCESS_VIOLATION);
    }
    __ENDTRY
    TRACE("returning %d\n", ret);
    return ret;
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}

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typedef BOOL (WINAPI *CryptEncodeObjectFunc)(DWORD, LPCSTR, const void *,
 BYTE *, DWORD *);

struct AsnEncodeSequenceItem
{
    const void           *pvStructInfo;
    CryptEncodeObjectFunc encodeFunc;
    DWORD                 size; /* used during encoding, not for your use */
};

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static BOOL CRYPT_AsnEncodeSequence(DWORD dwCertEncodingType,
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 struct AsnEncodeSequenceItem items[], DWORD cItem, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
    BOOL ret;
    DWORD i, dataLen = 0;

    TRACE("%p, %d, %p, %d\n", items, cItem, pbEncoded, *pcbEncoded);
    for (i = 0, ret = TRUE; ret && i < cItem; i++)
    {
        ret = items[i].encodeFunc(dwCertEncodingType, NULL,
         items[i].pvStructInfo, NULL, &items[i].size);
        /* Some functions propagate their errors through the size */
        if (!ret)
            *pcbEncoded = items[i].size;
        dataLen += items[i].size;
    }
    if (ret)
    {
        DWORD lenBytes, bytesNeeded;

        CRYPT_EncodeLen(dataLen, NULL, &lenBytes);
        bytesNeeded = 1 + lenBytes + dataLen;
        if (!pbEncoded)
            *pcbEncoded = bytesNeeded;
        else if (*pcbEncoded < bytesNeeded)
        {
            *pcbEncoded = bytesNeeded;
            SetLastError(ERROR_MORE_DATA);
            ret = FALSE;
        }
        else
        {
            *pcbEncoded = bytesNeeded;
            *pbEncoded++ = ASN_SEQUENCE;
            CRYPT_EncodeLen(dataLen, pbEncoded, &lenBytes);
            pbEncoded += lenBytes;
            for (i = 0; ret && i < cItem; i++)
            {
                ret = items[i].encodeFunc(dwCertEncodingType, NULL,
                 items[i].pvStructInfo, pbEncoded, &items[i].size);
                /* Some functions propagate their errors through the size */
                if (!ret)
                    *pcbEncoded = items[i].size;
                pbEncoded += items[i].size;
            }
        }
    }
    TRACE("returning %d\n", ret);
    return ret;
}

static BOOL WINAPI CRYPT_AsnEncodeBits(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
    BOOL ret = FALSE;

    __TRY
    {
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        const CRYPT_BIT_BLOB *blob = pvStructInfo;
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        DWORD bytesNeeded, lenBytes, dataBytes;
        BYTE unusedBits;

        /* yep, MS allows cUnusedBits to be >= 8 */
        if (!blob->cUnusedBits)
        {
            dataBytes = blob->cbData;
            unusedBits = 0;
        }
        else if (blob->cbData * 8 > blob->cUnusedBits)
        {
            dataBytes = (blob->cbData * 8 - blob->cUnusedBits) / 8 + 1;
            unusedBits = blob->cUnusedBits >= 8 ? blob->cUnusedBits / 8 :
             blob->cUnusedBits;
        }
        else
        {
            dataBytes = 0;
            unusedBits = 0;
        }
        CRYPT_EncodeLen(dataBytes + 1, NULL, &lenBytes);
        bytesNeeded = 1 + lenBytes + dataBytes + 1;
        if (!pbEncoded)
        {
            *pcbEncoded = bytesNeeded;
            ret = TRUE;
        }
        else if (*pcbEncoded < bytesNeeded)
        {
            *pcbEncoded = bytesNeeded;
            SetLastError(ERROR_MORE_DATA);
        }
        else
        {
            ret = TRUE;
            *pcbEncoded = bytesNeeded;
            *pbEncoded++ = ASN_BITSTRING;
            CRYPT_EncodeLen(dataBytes + 1, pbEncoded, &lenBytes);
            pbEncoded += lenBytes;
            *pbEncoded++ = unusedBits;
            if (dataBytes)
            {
                BYTE mask = 0xff << unusedBits;

                if (dataBytes > 1)
                {
                    memcpy(pbEncoded, blob->pbData, dataBytes - 1);
                    pbEncoded += dataBytes - 1;
                }
                *pbEncoded = *(blob->pbData + dataBytes - 1) & mask;
            }
        }
    }
    __EXCEPT_PAGE_FAULT
    {
        SetLastError(STATUS_ACCESS_VIOLATION);
    }
    __ENDTRY
    return ret;
}

struct AsnConstructedItem
{
    BYTE                  tag;
    const void           *pvStructInfo;
    CryptEncodeObjectFunc encodeFunc;
};

static BOOL WINAPI CRYPT_AsnEncodeConstructed(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
    BOOL ret;
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    const struct AsnConstructedItem *item = pvStructInfo;
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    DWORD len;

    if ((ret = item->encodeFunc(dwCertEncodingType, lpszStructType,
     item->pvStructInfo, NULL, &len)))
    {
        DWORD dataLen, bytesNeeded;

        CRYPT_EncodeLen(len, NULL, &dataLen);
        bytesNeeded = 1 + dataLen + len;
        if (!pbEncoded)
            *pcbEncoded = bytesNeeded;
        else if (*pcbEncoded < bytesNeeded)
        {
            *pcbEncoded = bytesNeeded;
            SetLastError(ERROR_MORE_DATA);
            ret = FALSE;
        }
        else
        {
            *pcbEncoded = bytesNeeded;
            *pbEncoded++ = ASN_CONTEXT | ASN_CONSTRUCTOR | item->tag;
            CRYPT_EncodeLen(len, pbEncoded, &dataLen);
            pbEncoded += dataLen;
            ret = item->encodeFunc(dwCertEncodingType, lpszStructType,
             item->pvStructInfo, pbEncoded, &len);
            if (!ret)
            {
                /* Some functions propagate their errors through the size */
                *pcbEncoded = len;
            }
        }
    }
    else
    {
        /* Some functions propagate their errors through the size */
        *pcbEncoded = len;
    }
    return ret;
}


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BOOL WINAPI WVTAsn1SpcPeImageDataEncode(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
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    const SPC_PE_IMAGE_DATA *imageData = pvStructInfo;
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    BOOL ret = FALSE;

    TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
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     debugstr_a(lpszStructType), pvStructInfo, pbEncoded,
     pcbEncoded);
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    __TRY
    {
        struct AsnEncodeSequenceItem items[2] = {
         { 0 }
        };
        struct AsnConstructedItem constructed = { 0, imageData->pFile,
         WVTAsn1SpcLinkEncode };
        DWORD cItem = 0;

        if (imageData->Flags.cbData)
        {
            items[cItem].pvStructInfo = &imageData->Flags;
            items[cItem].encodeFunc = CRYPT_AsnEncodeBits;
            cItem++;
        }
        if (imageData->pFile)
        {
            items[cItem].pvStructInfo = &constructed;
            items[cItem].encodeFunc = CRYPT_AsnEncodeConstructed;
            cItem++;
        }

        ret = CRYPT_AsnEncodeSequence(dwCertEncodingType, items, cItem,
         pbEncoded, pcbEncoded);
    }
    __EXCEPT_PAGE_FAULT
    {
        SetLastError(STATUS_ACCESS_VIOLATION);
    }
    __ENDTRY
    TRACE("returning %d\n", ret);
    return ret;
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}

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static BOOL WINAPI CRYPT_AsnEncodeOid(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
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    LPCSTR pszObjId = pvStructInfo;
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    DWORD bytesNeeded = 0, lenBytes;
    BOOL ret = TRUE;
    int firstPos = 0;
    BYTE firstByte = 0;

    TRACE("%s\n", debugstr_a(pszObjId));

    if (pszObjId)
    {
        const char *ptr;
        int val1, val2;

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        if (sscanf(pszObjId, "%d.%d%n", &val1, &val2, &firstPos) != 2)
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        {
            SetLastError(CRYPT_E_ASN1_ERROR);
            return FALSE;
        }
        bytesNeeded++;
        firstByte = val1 * 40 + val2;
        ptr = pszObjId + firstPos;
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        if (*ptr == '.')
        {
            ptr++;
            firstPos++;
        }
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        while (ret && *ptr)
        {
            int pos;

            /* note I assume each component is at most 32-bits long in base 2 */
            if (sscanf(ptr, "%d%n", &val1, &pos) == 1)
            {
                if (val1 >= 0x10000000)
                    bytesNeeded += 5;
                else if (val1 >= 0x200000)
                    bytesNeeded += 4;
                else if (val1 >= 0x4000)
                    bytesNeeded += 3;
                else if (val1 >= 0x80)
                    bytesNeeded += 2;
                else
                    bytesNeeded += 1;
                ptr += pos;
                if (*ptr == '.')
                    ptr++;
            }
            else
            {
                SetLastError(CRYPT_E_ASN1_ERROR);
                return FALSE;
            }
        }
        CRYPT_EncodeLen(bytesNeeded, NULL, &lenBytes);
    }
    else
        lenBytes = 1;
    bytesNeeded += 1 + lenBytes;
    if (pbEncoded)
    {
        if (*pcbEncoded < bytesNeeded)
        {
            SetLastError(ERROR_MORE_DATA);
            ret = FALSE;
        }
        else
        {
            *pbEncoded++ = ASN_OBJECTIDENTIFIER;
            CRYPT_EncodeLen(bytesNeeded - 1 - lenBytes, pbEncoded, &lenBytes);
            pbEncoded += lenBytes;
            if (pszObjId)
            {
                const char *ptr;
                int val, pos;

                *pbEncoded++ = firstByte;
                ptr = pszObjId + firstPos;
                while (ret && *ptr)
                {
                    sscanf(ptr, "%d%n", &val, &pos);
                    {
                        unsigned char outBytes[5];
                        int numBytes, i;

                        if (val >= 0x10000000)
                            numBytes = 5;
                        else if (val >= 0x200000)
                            numBytes = 4;
                        else if (val >= 0x4000)
                            numBytes = 3;
                        else if (val >= 0x80)
                            numBytes = 2;
                        else
                            numBytes = 1;
                        for (i = numBytes; i > 0; i--)
                        {
                            outBytes[i - 1] = val & 0x7f;
                            val >>= 7;
                        }
                        for (i = 0; i < numBytes - 1; i++)
                            *pbEncoded++ = outBytes[i] | 0x80;
                        *pbEncoded++ = outBytes[i];
                        ptr += pos;
                        if (*ptr == '.')
                            ptr++;
                    }
                }
            }
        }
    }
    *pcbEncoded = bytesNeeded;
    return ret;
}

static BOOL WINAPI CRYPT_CopyEncodedBlob(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
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    const CRYPT_DER_BLOB *blob = pvStructInfo;
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    BOOL ret = TRUE;

    if (!pbEncoded)
        *pcbEncoded = blob->cbData;
    else if (*pcbEncoded < blob->cbData)
    {
        *pcbEncoded = blob->cbData;
        SetLastError(ERROR_MORE_DATA);
        ret = FALSE;
    }
    else
    {
        if (blob->cbData)
            memcpy(pbEncoded, blob->pbData, blob->cbData);
        *pcbEncoded = blob->cbData;
    }
    return ret;
}

static BOOL WINAPI CRYPT_AsnEncodeAlgorithmIdWithNullParams(
 DWORD dwCertEncodingType, LPCSTR lpszStructType, const void *pvStructInfo,
 BYTE *pbEncoded, DWORD *pcbEncoded)
{
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    const CRYPT_ALGORITHM_IDENTIFIER *algo = pvStructInfo;
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    static const BYTE asn1Null[] = { ASN_NULL, 0 };
    static const CRYPT_DATA_BLOB nullBlob = { sizeof(asn1Null),
     (LPBYTE)asn1Null };
    BOOL ret;
    struct AsnEncodeSequenceItem items[2] = {
     { algo->pszObjId, CRYPT_AsnEncodeOid, 0 },
     { NULL,           CRYPT_CopyEncodedBlob, 0 },
    };

    if (algo->Parameters.cbData)
        items[1].pvStructInfo = &algo->Parameters;
    else
        items[1].pvStructInfo = &nullBlob;
    ret = CRYPT_AsnEncodeSequence(dwCertEncodingType, items,
     sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
    return ret;
}

static BOOL WINAPI CRYPT_AsnEncodeAttributeTypeValue(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
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    const CRYPT_ATTRIBUTE_TYPE_VALUE *typeValue = pvStructInfo;
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    struct AsnEncodeSequenceItem items[] = {
     { &typeValue->pszObjId, CRYPT_AsnEncodeOid, 0 },
     { &typeValue->Value,    CRYPT_CopyEncodedBlob, 0 },
    };

    return CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
     items, sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
}

struct SPCDigest
{
    CRYPT_ALGORITHM_IDENTIFIER DigestAlgorithm;
    CRYPT_HASH_BLOB            Digest;
};

static BOOL WINAPI CRYPT_AsnEncodeSPCDigest(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
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    const struct SPCDigest *digest = pvStructInfo;
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    struct AsnEncodeSequenceItem items[] = {
     { &digest->DigestAlgorithm, CRYPT_AsnEncodeAlgorithmIdWithNullParams, 0 },
     { &digest->Digest,          CRYPT_CopyEncodedBlob, 0 },
    };

    return CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
     items, sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
}

BOOL WINAPI WVTAsn1SpcIndirectDataContentEncode(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
    BOOL ret = FALSE;

    TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
     debugstr_a(lpszStructType), pvStructInfo, pbEncoded, pcbEncoded);

    __TRY
    {
726
        const SPC_INDIRECT_DATA_CONTENT *data = pvStructInfo;
727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742
        struct AsnEncodeSequenceItem items[] = {
         { &data->Data,            CRYPT_AsnEncodeAttributeTypeValue, 0 },
         { &data->DigestAlgorithm, CRYPT_AsnEncodeSPCDigest, 0 },
        };

        ret = CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
         items, sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
    }
    __EXCEPT_PAGE_FAULT
    {
        SetLastError(STATUS_ACCESS_VIOLATION);
    }
    __ENDTRY
    return ret;
}

743 744 745 746 747
static BOOL WINAPI CRYPT_AsnEncodeBMPString(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
    BOOL ret = TRUE;
748
    LPCWSTR str = pvStructInfo;
749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781
    DWORD bytesNeeded, lenBytes, strLen;

    if (str)
        strLen = lstrlenW(str);
    else
        strLen = 0;
    CRYPT_EncodeLen(strLen * 2, NULL, &lenBytes);
    bytesNeeded = 1 + lenBytes + strLen * 2;
    if (!pbEncoded)
        *pcbEncoded = bytesNeeded;
    else if (*pcbEncoded < bytesNeeded)
    {
        *pcbEncoded = bytesNeeded;
        SetLastError(ERROR_MORE_DATA);
        ret = FALSE;
    }
    else
    {
        DWORD i;

        *pcbEncoded = bytesNeeded;
        *pbEncoded++ = ASN_BMPSTRING;
        CRYPT_EncodeLen(strLen * 2, pbEncoded, &lenBytes);
        pbEncoded += lenBytes;
        for (i = 0; i < strLen; i++)
        {
            *pbEncoded++ = (str[i] & 0xff00) >> 8;
            *pbEncoded++ = str[i] & 0x00ff;
        }
    }
    return ret;
}

782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881
struct AsnEncodeTagSwappedItem
{
    BYTE                  tag;
    const void           *pvStructInfo;
    CryptEncodeObjectFunc encodeFunc;
};

/* Sort of a wacky hack, it encodes something using the struct
 * AsnEncodeTagSwappedItem's encodeFunc, then replaces the tag byte with the tag
 * given in the struct AsnEncodeTagSwappedItem.
 */
static BOOL WINAPI CRYPT_AsnEncodeSwapTag(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
    BOOL ret;
    const struct AsnEncodeTagSwappedItem *item = pvStructInfo;

    ret = item->encodeFunc(dwCertEncodingType, lpszStructType,
     item->pvStructInfo, pbEncoded, pcbEncoded);
    if (ret && pbEncoded)
        *pbEncoded = item->tag;
    return ret;
}

BOOL WINAPI WVTAsn1SpcSpOpusInfoEncode(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
    BOOL ret = FALSE;

    TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
     debugstr_a(lpszStructType), pvStructInfo, pbEncoded, pcbEncoded);

    __TRY
    {
        const SPC_SP_OPUS_INFO *info = pvStructInfo;

        if (info->pMoreInfo &&
         info->pMoreInfo->dwLinkChoice != SPC_URL_LINK_CHOICE &&
         info->pMoreInfo->dwLinkChoice != SPC_MONIKER_LINK_CHOICE &&
         info->pMoreInfo->dwLinkChoice != SPC_FILE_LINK_CHOICE)
            SetLastError(E_INVALIDARG);
        else if (info->pPublisherInfo &&
         info->pPublisherInfo->dwLinkChoice != SPC_URL_LINK_CHOICE &&
         info->pPublisherInfo->dwLinkChoice != SPC_MONIKER_LINK_CHOICE &&
         info->pPublisherInfo->dwLinkChoice != SPC_FILE_LINK_CHOICE)
            SetLastError(E_INVALIDARG);
        else
        {
            struct AsnEncodeSequenceItem items[3] = { { 0 } };
            struct AsnConstructedItem constructed[3] = { { 0 } };
            struct AsnEncodeTagSwappedItem swapped;
            DWORD cItem = 0, cConstructed = 0;

            if (info->pwszProgramName)
            {
                swapped.tag = ASN_CONTEXT;
                swapped.pvStructInfo = info->pwszProgramName;
                swapped.encodeFunc = CRYPT_AsnEncodeBMPString;
                constructed[cConstructed].tag = 0;
                constructed[cConstructed].pvStructInfo = &swapped;
                constructed[cConstructed].encodeFunc = CRYPT_AsnEncodeSwapTag;
                items[cItem].pvStructInfo = &constructed[cConstructed];
                items[cItem].encodeFunc = CRYPT_AsnEncodeConstructed;
                cConstructed++;
                cItem++;
            }
            if (info->pMoreInfo)
            {
                constructed[cConstructed].tag = 1;
                constructed[cConstructed].pvStructInfo = info->pMoreInfo;
                constructed[cConstructed].encodeFunc = WVTAsn1SpcLinkEncode;
                items[cItem].pvStructInfo = &constructed[cConstructed];
                items[cItem].encodeFunc = CRYPT_AsnEncodeConstructed;
                cConstructed++;
                cItem++;
            }
            if (info->pPublisherInfo)
            {
                constructed[cConstructed].tag = 2;
                constructed[cConstructed].pvStructInfo = info->pPublisherInfo;
                constructed[cConstructed].encodeFunc = WVTAsn1SpcLinkEncode;
                items[cItem].pvStructInfo = &constructed[cConstructed];
                items[cItem].encodeFunc = CRYPT_AsnEncodeConstructed;
                cConstructed++;
                cItem++;
            }
            ret = CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
             items, cItem, pbEncoded, pcbEncoded);
        }
    }
    __EXCEPT_PAGE_FAULT
    {
        SetLastError(STATUS_ACCESS_VIOLATION);
    }
    __ENDTRY
    return ret;
}

882
static BOOL CRYPT_AsnEncodeInteger(DWORD dwCertEncodingType,
883 884 885 886 887 888 889 890 891 892
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
    BOOL ret;

    __TRY
    {
        DWORD significantBytes, lenBytes, bytesNeeded;
        BYTE padByte = 0;
        BOOL pad = FALSE;
893
        const CRYPT_INTEGER_BLOB *blob = pvStructInfo;
894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971

        significantBytes = blob->cbData;
        if (significantBytes)
        {
            if (blob->pbData[significantBytes - 1] & 0x80)
            {
                /* negative, lop off leading (little-endian) 0xffs */
                for (; significantBytes > 0 &&
                 blob->pbData[significantBytes - 1] == 0xff; significantBytes--)
                    ;
                if (blob->pbData[significantBytes - 1] < 0x80)
                {
                    padByte = 0xff;
                    pad = TRUE;
                }
            }
            else
            {
                /* positive, lop off leading (little-endian) zeroes */
                for (; significantBytes > 0 &&
                 !blob->pbData[significantBytes - 1]; significantBytes--)
                    ;
                if (significantBytes == 0)
                    significantBytes = 1;
                if (blob->pbData[significantBytes - 1] > 0x7f)
                {
                    padByte = 0;
                    pad = TRUE;
                }
            }
        }
        if (pad)
            CRYPT_EncodeLen(significantBytes + 1, NULL, &lenBytes);
        else
            CRYPT_EncodeLen(significantBytes, NULL, &lenBytes);
        bytesNeeded = 1 + lenBytes + significantBytes;
        if (pad)
            bytesNeeded++;
        if (!pbEncoded)
        {
            *pcbEncoded = bytesNeeded;
            ret = TRUE;
        }
        else if (*pcbEncoded < bytesNeeded)
        {
            *pcbEncoded = bytesNeeded;
            SetLastError(ERROR_MORE_DATA);
            ret = FALSE;
        }
        else
        {
            *pcbEncoded = bytesNeeded;
            *pbEncoded++ = ASN_INTEGER;
            if (pad)
            {
                CRYPT_EncodeLen(significantBytes + 1, pbEncoded, &lenBytes);
                pbEncoded += lenBytes;
                *pbEncoded++ = padByte;
            }
            else
            {
                CRYPT_EncodeLen(significantBytes, pbEncoded, &lenBytes);
                pbEncoded += lenBytes;
            }
            for (; significantBytes > 0; significantBytes--)
                *(pbEncoded++) = blob->pbData[significantBytes - 1];
            ret = TRUE;
        }
    }
    __EXCEPT_PAGE_FAULT
    {
        SetLastError(STATUS_ACCESS_VIOLATION);
        ret = FALSE;
    }
    __ENDTRY
    return ret;
}

972
static BOOL WINAPI CRYPT_AsnEncodeInt(DWORD dwCertEncodingType,
973 974 975 976 977 978 979 980 981
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
    CRYPT_INTEGER_BLOB blob = { sizeof(INT), (BYTE *)pvStructInfo };

    return CRYPT_AsnEncodeInteger(dwCertEncodingType, X509_MULTI_BYTE_INTEGER,
     &blob, pbEncoded, pcbEncoded);
}

982 983 984 985
BOOL WINAPI WVTAsn1CatMemberInfoEncode(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
986 987 988
    BOOL ret = FALSE;

    TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
989
     debugstr_a(lpszStructType), pvStructInfo, pbEncoded, pcbEncoded);
990 991 992

    __TRY
    {
993
        const CAT_MEMBERINFO *info = pvStructInfo;
994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007
        struct AsnEncodeSequenceItem items[] = {
         { info->pwszSubjGuid, CRYPT_AsnEncodeBMPString, 0 },
         { &info->dwCertVersion, CRYPT_AsnEncodeInt, 0 },
        };

        ret = CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
         items, sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
    }
    __EXCEPT_PAGE_FAULT
    {
        SetLastError(STATUS_ACCESS_VIOLATION);
    }
    __ENDTRY
    return ret;
1008 1009
}

1010 1011 1012 1013
BOOL WINAPI WVTAsn1CatNameValueEncode(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
1014 1015 1016
    BOOL ret = FALSE;

    TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
1017
     debugstr_a(lpszStructType), pvStructInfo, pbEncoded, pcbEncoded);
1018 1019 1020

    __TRY
    {
1021
        const CAT_NAMEVALUE *value = pvStructInfo;
1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036
        struct AsnEncodeSequenceItem items[] = {
         { value->pwszTag,   CRYPT_AsnEncodeBMPString, 0 },
         { &value->fdwFlags, CRYPT_AsnEncodeInt, 0 },
         { &value->Value,    CRYPT_AsnEncodeOctets, 0 },
        };

        ret = CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
         items, sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
    }
    __EXCEPT_PAGE_FAULT
    {
        SetLastError(STATUS_ACCESS_VIOLATION);
    }
    __ENDTRY
    return ret;
1037 1038
}

1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069
static BOOL WINAPI CRYPT_AsnEncodeBool(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
    BOOL val = *(const BOOL *)pvStructInfo, ret;

    TRACE("%d\n", val);

    if (!pbEncoded)
    {
        *pcbEncoded = 3;
        ret = TRUE;
    }
    else if (*pcbEncoded < 3)
    {
        *pcbEncoded = 3;
        SetLastError(ERROR_MORE_DATA);
        ret = FALSE;
    }
    else
    {
        *pcbEncoded = 3;
        *pbEncoded++ = ASN_BOOL;
        *pbEncoded++ = 1;
        *pbEncoded++ = val ? 0xff : 0;
        ret = TRUE;
    }
    TRACE("returning %d (%08x)\n", ret, GetLastError());
    return ret;
}

1070 1071 1072 1073
BOOL WINAPI WVTAsn1SpcFinancialCriteriaInfoEncode(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const void *pvStructInfo, BYTE *pbEncoded,
 DWORD *pcbEncoded)
{
1074 1075 1076
    BOOL ret = FALSE;

    TRACE("(0x%08x, %s, %p, %p, %p)\n", dwCertEncodingType,
1077
     debugstr_a(lpszStructType), pvStructInfo, pbEncoded, pcbEncoded);
1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095

    __TRY
    {
        const SPC_FINANCIAL_CRITERIA *criteria = pvStructInfo;
        struct AsnEncodeSequenceItem items[] = {
         { &criteria->fFinancialInfoAvailable, CRYPT_AsnEncodeBool, 0 },
         { &criteria->fMeetsCriteria,          CRYPT_AsnEncodeBool, 0 },
        };

        ret = CRYPT_AsnEncodeSequence(X509_ASN_ENCODING,
         items, sizeof(items) / sizeof(items[0]), pbEncoded, pcbEncoded);
    }
    __EXCEPT_PAGE_FAULT
    {
        SetLastError(STATUS_ACCESS_VIOLATION);
    }
    __ENDTRY
    return ret;
1096 1097
}

1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211
/* Gets the number of length bytes from the given (leading) length byte */
#define GET_LEN_BYTES(b) ((b) <= 0x7f ? 1 : 1 + ((b) & 0x7f))

/* Helper function to get the encoded length of the data starting at pbEncoded,
 * where pbEncoded[0] is the tag.  If the data are too short to contain a
 * length or if the length is too large for cbEncoded, sets an appropriate
 * error code and returns FALSE.
 */
static BOOL CRYPT_GetLen(const BYTE *pbEncoded, DWORD cbEncoded, DWORD *len)
{
    BOOL ret;

    if (cbEncoded <= 1)
    {
        SetLastError(CRYPT_E_ASN1_CORRUPT);
        ret = FALSE;
    }
    else if (pbEncoded[1] <= 0x7f)
    {
        if (pbEncoded[1] + 1 > cbEncoded)
        {
            SetLastError(CRYPT_E_ASN1_EOD);
            ret = FALSE;
        }
        else
        {
            *len = pbEncoded[1];
            ret = TRUE;
        }
    }
    else if (pbEncoded[1] == 0x80)
    {
        FIXME("unimplemented for indefinite-length encoding\n");
        SetLastError(CRYPT_E_ASN1_CORRUPT);
        ret = FALSE;
    }
    else
    {
        BYTE lenLen = GET_LEN_BYTES(pbEncoded[1]);

        if (lenLen > sizeof(DWORD) + 1)
        {
            SetLastError(CRYPT_E_ASN1_LARGE);
            ret = FALSE;
        }
        else if (lenLen + 2 > cbEncoded)
        {
            SetLastError(CRYPT_E_ASN1_CORRUPT);
            ret = FALSE;
        }
        else
        {
            DWORD out = 0;

            pbEncoded += 2;
            while (--lenLen)
            {
                out <<= 8;
                out |= *pbEncoded++;
            }
            if (out + lenLen + 1 > cbEncoded)
            {
                SetLastError(CRYPT_E_ASN1_EOD);
                ret = FALSE;
            }
            else
            {
                *len = out;
                ret = TRUE;
            }
        }
    }
    return ret;
}

static BOOL WINAPI CRYPT_AsnDecodeOctets(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
    BOOL ret;
    DWORD bytesNeeded, dataLen;

    TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, *pcbStructInfo);

    if (!cbEncoded)
    {
        SetLastError(CRYPT_E_ASN1_CORRUPT);
        ret = FALSE;
    }
    else if (pbEncoded[0] != ASN_OCTETSTRING)
    {
        SetLastError(CRYPT_E_ASN1_BADTAG);
        ret = FALSE;
    }
    else if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
    {
        if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
            bytesNeeded = sizeof(CRYPT_DATA_BLOB);
        else
            bytesNeeded = dataLen + sizeof(CRYPT_DATA_BLOB);
        if (!pvStructInfo)
            *pcbStructInfo = bytesNeeded;
        else if (*pcbStructInfo < bytesNeeded)
        {
            SetLastError(ERROR_MORE_DATA);
            *pcbStructInfo = bytesNeeded;
            ret = FALSE;
        }
        else
        {
            CRYPT_DATA_BLOB *blob;
            BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);

1212
            blob = pvStructInfo;
1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227
            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;
}

1228
static BOOL CRYPT_AsnDecodeSPCLinkInternal(DWORD dwCertEncodingType,
1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
    BOOL ret = FALSE;
    DWORD bytesNeeded = sizeof(SPC_LINK), dataLen;

    TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, *pcbStructInfo);

    if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
    {
        BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
        DWORD realDataLen;

        switch (pbEncoded[0])
        {
        case ASN_CONTEXT:
            bytesNeeded += (dataLen + 1) * sizeof(WCHAR);
            if (!pvStructInfo)
                *pcbStructInfo = bytesNeeded;
            else if (*pcbStructInfo < bytesNeeded)
            {
                *pcbStructInfo = bytesNeeded;
                SetLastError(ERROR_MORE_DATA);
                ret = FALSE;
            }
            else
            {
1257
                PSPC_LINK link = pvStructInfo;
1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305
                DWORD i;

                link->dwLinkChoice = SPC_URL_LINK_CHOICE;
                for (i = 0; i < dataLen; i++)
                    link->u.pwszUrl[i] =
                     *(pbEncoded + 1 + lenBytes + i);
                link->u.pwszUrl[i] = '\0';
                TRACE("returning url %s\n", debugstr_w(link->u.pwszUrl));
            }
            break;
        case ASN_CONSTRUCTOR | ASN_CONTEXT | 1:
        {
            CRYPT_DATA_BLOB classId;
            DWORD size = sizeof(classId);

            if ((ret = CRYPT_AsnDecodeOctets(dwCertEncodingType, NULL,
             pbEncoded + 1 + lenBytes, cbEncoded - 1 - lenBytes,
             CRYPT_DECODE_NOCOPY_FLAG, &classId, &size)))
            {
                if (classId.cbData != sizeof(SPC_UUID))
                {
                    SetLastError(CRYPT_E_BAD_ENCODE);
                    ret = FALSE;
                }
                else
                {
                    CRYPT_DATA_BLOB data;

                    /* The tag length for the classId must be 1 since the
                     * length is correct.
                     */
                    size = sizeof(data);
                    if ((ret = CRYPT_AsnDecodeOctets(dwCertEncodingType, NULL,
                     pbEncoded + 3 + lenBytes + classId.cbData,
                     cbEncoded - 3 - lenBytes - classId.cbData,
                     CRYPT_DECODE_NOCOPY_FLAG, &data, &size)))
                    {
                        bytesNeeded += data.cbData;
                        if (!pvStructInfo)
                            *pcbStructInfo = bytesNeeded;
                        else if (*pcbStructInfo < bytesNeeded)
                        {
                            *pcbStructInfo = bytesNeeded;
                            SetLastError(ERROR_MORE_DATA);
                            ret = FALSE;
                        }
                        else
                        {
1306
                            PSPC_LINK link = pvStructInfo;
1307 1308 1309 1310 1311 1312 1313

                            link->dwLinkChoice = SPC_MONIKER_LINK_CHOICE;
                            /* pwszFile pointer was set by caller, copy it
                             * before overwriting it
                             */
                            link->u.Moniker.SerializedData.pbData =
                             (BYTE *)link->u.pwszFile;
1314
                            memcpy(link->u.Moniker.ClassId, classId.pbData,
1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343
                             classId.cbData);
                            memcpy(link->u.Moniker.SerializedData.pbData,
                             data.pbData, data.cbData);
                            link->u.Moniker.SerializedData.cbData = data.cbData;
                        }
                    }
                }
            }
            break;
        }
        case ASN_CONSTRUCTOR | ASN_CONTEXT | 2:
            if (dataLen && pbEncoded[1 + lenBytes] != ASN_CONTEXT)
                SetLastError(CRYPT_E_ASN1_BADTAG);
            else if ((ret = CRYPT_GetLen(pbEncoded + 1 + lenBytes, dataLen,
             &realDataLen)))
            {
                BYTE realLenBytes = GET_LEN_BYTES(pbEncoded[2 + lenBytes]);

                bytesNeeded += realDataLen + sizeof(WCHAR);
                if (!pvStructInfo)
                    *pcbStructInfo = bytesNeeded;
                else if (*pcbStructInfo < bytesNeeded)
                {
                    *pcbStructInfo = bytesNeeded;
                    SetLastError(ERROR_MORE_DATA);
                    ret = FALSE;
                }
                else
                {
1344
                    PSPC_LINK link = pvStructInfo;
1345 1346 1347 1348 1349 1350
                    DWORD i;
                    const BYTE *ptr = pbEncoded + 2 + lenBytes + realLenBytes;

                    link->dwLinkChoice = SPC_FILE_LINK_CHOICE;
                    for (i = 0; i < dataLen / sizeof(WCHAR); i++)
                        link->u.pwszFile[i] =
1351
                         hton16(*(const WORD *)(ptr + i * sizeof(WCHAR)));
1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368
                    link->u.pwszFile[realDataLen / sizeof(WCHAR)] = '\0';
                    TRACE("returning file %s\n", debugstr_w(link->u.pwszFile));
                }
            }
            else
            {
                bytesNeeded += sizeof(WCHAR);
                if (!pvStructInfo)
                    *pcbStructInfo = bytesNeeded;
                else if (*pcbStructInfo < bytesNeeded)
                {
                    *pcbStructInfo = bytesNeeded;
                    SetLastError(ERROR_MORE_DATA);
                    ret = FALSE;
                }
                else
                {
1369
                    PSPC_LINK link = pvStructInfo;
1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384

                    link->dwLinkChoice = SPC_FILE_LINK_CHOICE;
                    link->u.pwszFile[0] = '\0';
                    ret = TRUE;
                }
            }
            break;
        default:
            SetLastError(CRYPT_E_ASN1_BADTAG);
        }
    }
    TRACE("returning %d\n", ret);
    return ret;
}

1385 1386 1387 1388
BOOL WINAPI WVTAsn1SpcLinkDecode(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411
    BOOL ret = FALSE;

    TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, *pcbStructInfo);

    __TRY
    {
        DWORD bytesNeeded;

        ret = CRYPT_AsnDecodeSPCLinkInternal(dwCertEncodingType,
         lpszStructType, pbEncoded, cbEncoded, dwFlags, NULL, &bytesNeeded);
        if (ret)
        {
            if (!pvStructInfo)
                *pcbStructInfo = bytesNeeded;
            else if (*pcbStructInfo < bytesNeeded)
            {
                *pcbStructInfo = bytesNeeded;
                SetLastError(ERROR_MORE_DATA);
                ret = FALSE;
            }
            else
            {
1412
                SPC_LINK *link = pvStructInfo;
1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428

                link->u.pwszFile =
                 (LPWSTR)((BYTE *)pvStructInfo + sizeof(SPC_LINK));
                ret = CRYPT_AsnDecodeSPCLinkInternal(dwCertEncodingType,
                 lpszStructType, pbEncoded, cbEncoded, dwFlags, pvStructInfo,
                 pcbStructInfo);
            }
        }
    }
    __EXCEPT_PAGE_FAULT
    {
        SetLastError(STATUS_ACCESS_VIOLATION);
    }
    __ENDTRY
    TRACE("returning %d\n", ret);
    return ret;
1429 1430
}

1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467
typedef BOOL (WINAPI *CryptDecodeObjectFunc)(DWORD, LPCSTR, const BYTE *,
 DWORD, DWORD, void *, DWORD *);

/* tag:
 *     The expected tag of the item.  If tag is 0, decodeFunc is called
 *     regardless of the tag value seen.
 * offset:
 *     A sequence is decoded into a struct.  The offset member is the
 *     offset of this item within that struct.
 * decodeFunc:
 *     The decoder function to use.  If this is NULL, then the member isn't
 *     decoded, but minSize space is reserved for it.
 * minSize:
 *     The minimum amount of space occupied after decoding.  You must set this.
 * optional:
 *     If true, and the tag doesn't match the expected tag for this item,
 *     or the decodeFunc fails with CRYPT_E_ASN1_BADTAG, then minSize space is
 *     filled with 0 for this member.
 * hasPointer, pointerOffset:
 *     If the item has dynamic data, set hasPointer to TRUE, pointerOffset to
 *     the offset within the struct of the data pointer (or to the
 *     first data pointer, if more than one exist).
 * size:
 *     Used by CRYPT_AsnDecodeSequence, not for your use.
 */
struct AsnDecodeSequenceItem
{
    BYTE                  tag;
    DWORD                 offset;
    CryptDecodeObjectFunc decodeFunc;
    DWORD                 minSize;
    BOOL                  optional;
    BOOL                  hasPointer;
    DWORD                 pointerOffset;
    DWORD                 size;
};

1468 1469 1470 1471
/* Align up to a DWORD_PTR boundary
 */
#define ALIGN_DWORD_PTR(x) (((x) + sizeof(DWORD_PTR) - 1) & ~(sizeof(DWORD_PTR) - 1))

1472 1473 1474 1475 1476
#define FINALMEMBERSIZE(s, member) (sizeof(s) - offsetof(s, member))
#define MEMBERSIZE(s, member, nextmember) \
    (offsetof(s, nextmember) - offsetof(s, member))


1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527
/* Decodes the items in a sequence, where the items are described in items,
 * the encoded data are in pbEncoded with length cbEncoded.  Decodes into
 * pvStructInfo.  nextData is a pointer to the memory location at which the
 * first decoded item with a dynamic pointer should point.
 * Upon decoding, *cbDecoded is the total number of bytes decoded.
 */
static BOOL CRYPT_AsnDecodeSequenceItems(DWORD dwCertEncodingType,
 struct AsnDecodeSequenceItem items[], DWORD cItem, const BYTE *pbEncoded,
 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, BYTE *nextData,
 DWORD *cbDecoded)
{
    BOOL ret;
    DWORD i, decoded = 0;
    const BYTE *ptr = pbEncoded;

    TRACE("%p, %d, %p, %d, %08x, %p, %p, %p\n", items, cItem, pbEncoded,
     cbEncoded, dwFlags, pvStructInfo, nextData, cbDecoded);

    for (i = 0, ret = TRUE; ret && i < cItem; i++)
    {
        if (cbEncoded - (ptr - pbEncoded) != 0)
        {
            DWORD nextItemLen;

            if ((ret = CRYPT_GetLen(ptr, cbEncoded - (ptr - pbEncoded),
             &nextItemLen)))
            {
                BYTE nextItemLenBytes = GET_LEN_BYTES(ptr[1]);

                if (ptr[0] == items[i].tag || !items[i].tag)
                {
                    if (nextData && pvStructInfo && items[i].hasPointer)
                    {
                        TRACE("Setting next pointer to %p\n",
                         nextData);
                        *(BYTE **)((BYTE *)pvStructInfo +
                         items[i].pointerOffset) = nextData;
                    }
                    if (items[i].decodeFunc)
                    {
                        if (pvStructInfo)
                            TRACE("decoding item %d\n", i);
                        else
                            TRACE("sizing item %d\n", i);
                        ret = items[i].decodeFunc(dwCertEncodingType,
                         NULL, ptr, 1 + nextItemLenBytes + nextItemLen,
                         dwFlags & ~CRYPT_DECODE_ALLOC_FLAG,
                         pvStructInfo ?  (BYTE *)pvStructInfo + items[i].offset
                         : NULL, &items[i].size);
                        if (ret)
                        {
1528 1529 1530 1531 1532 1533 1534
                            if (items[i].size < items[i].minSize)
                                items[i].size = items[i].minSize;
                            else if (items[i].size > items[i].minSize)
                            {
                                /* Account for alignment padding */
                                items[i].size = ALIGN_DWORD_PTR(items[i].size);
                            }
1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663
                            TRACE("item %d size: %d\n", i, items[i].size);
                            if (nextData && items[i].hasPointer &&
                             items[i].size > items[i].minSize)
                                nextData += items[i].size - items[i].minSize;
                            ptr += 1 + nextItemLenBytes + nextItemLen;
                            decoded += 1 + nextItemLenBytes + nextItemLen;
                            TRACE("item %d: decoded %d bytes\n", i,
                             1 + nextItemLenBytes + nextItemLen);
                        }
                        else if (items[i].optional &&
                         GetLastError() == CRYPT_E_ASN1_BADTAG)
                        {
                            TRACE("skipping optional item %d\n", i);
                            items[i].size = items[i].minSize;
                            SetLastError(NOERROR);
                            ret = TRUE;
                        }
                        else
                            TRACE("item %d failed: %08x\n", i,
                             GetLastError());
                    }
                    else
                    {
                        TRACE("item %d: decoded %d bytes\n", i,
                         1 + nextItemLenBytes + nextItemLen);
                        ptr += 1 + nextItemLenBytes + nextItemLen;
                        decoded += 1 + nextItemLenBytes + nextItemLen;
                        items[i].size = items[i].minSize;
                    }
                }
                else if (items[i].optional)
                {
                    TRACE("skipping optional item %d\n", i);
                    items[i].size = items[i].minSize;
                }
                else
                {
                    TRACE("item %d: tag %02x doesn't match expected %02x\n",
                     i, ptr[0], items[i].tag);
                    SetLastError(CRYPT_E_ASN1_BADTAG);
                    ret = FALSE;
                }
            }
        }
        else if (items[i].optional)
        {
            TRACE("missing optional item %d, skipping\n", i);
            items[i].size = items[i].minSize;
        }
        else
        {
            TRACE("not enough bytes for item %d, failing\n", i);
            SetLastError(CRYPT_E_ASN1_CORRUPT);
            ret = FALSE;
        }
    }
    if (ret)
        *cbDecoded = decoded;
    TRACE("returning %d\n", ret);
    return ret;
}

/* This decodes an arbitrary sequence into a contiguous block of memory
 * (basically, a struct.)  Each element being decoded is described by a struct
 * AsnDecodeSequenceItem, see above.
 * startingPointer is an optional pointer to the first place where dynamic
 * data will be stored.  If you know the starting offset, you may pass it
 * here.  Otherwise, pass NULL, and one will be inferred from the items.
 */
static BOOL CRYPT_AsnDecodeSequence(DWORD dwCertEncodingType,
 struct AsnDecodeSequenceItem items[], DWORD cItem, const BYTE *pbEncoded,
 DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo, DWORD *pcbStructInfo,
 void *startingPointer)
{
    BOOL ret;

    TRACE("%p, %d, %p, %d, %08x, %p, %d, %p\n", items, cItem, pbEncoded,
     cbEncoded, dwFlags, pvStructInfo, *pcbStructInfo, startingPointer);

    if (pbEncoded[0] == ASN_SEQUENCE)
    {
        DWORD dataLen;

        if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
        {
            DWORD lenBytes = GET_LEN_BYTES(pbEncoded[1]), cbDecoded;
            const BYTE *ptr = pbEncoded + 1 + lenBytes;

            cbEncoded -= 1 + lenBytes;
            if (cbEncoded < dataLen)
            {
                TRACE("dataLen %d exceeds cbEncoded %d, failing\n", dataLen,
                 cbEncoded);
                SetLastError(CRYPT_E_ASN1_CORRUPT);
                ret = FALSE;
            }
            else
                ret = CRYPT_AsnDecodeSequenceItems(dwFlags, items, cItem, ptr,
                 cbEncoded, dwFlags, NULL, NULL, &cbDecoded);
            if (ret && cbDecoded != dataLen)
            {
                TRACE("expected %d decoded, got %d, failing\n", dataLen,
                 cbDecoded);
                SetLastError(CRYPT_E_ASN1_CORRUPT);
                ret = FALSE;
            }
            if (ret)
            {
                DWORD i, bytesNeeded = 0, structSize = 0;

                for (i = 0; i < cItem; i++)
                {
                    bytesNeeded += items[i].size;
                    structSize += items[i].minSize;
                }
                if (!pvStructInfo)
                    *pcbStructInfo = bytesNeeded;
                else if (*pcbStructInfo < bytesNeeded)
                {
                    SetLastError(ERROR_MORE_DATA);
                    *pcbStructInfo = bytesNeeded;
                    ret = FALSE;
                }
                else
                {
                    BYTE *nextData;

                    *pcbStructInfo = bytesNeeded;
                    if (startingPointer)
1664
                        nextData = startingPointer;
1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714
                    else
                        nextData = (BYTE *)pvStructInfo + structSize;
                    memset(pvStructInfo, 0, structSize);
                    ret = CRYPT_AsnDecodeSequenceItems(dwFlags, items, cItem,
                     ptr, cbEncoded, dwFlags, pvStructInfo, nextData,
                     &cbDecoded);
                }
            }
        }
    }
    else
    {
        SetLastError(CRYPT_E_ASN1_BADTAG);
        ret = FALSE;
    }
    TRACE("returning %d (%08x)\n", ret, GetLastError());
    return ret;
}

static BOOL WINAPI CRYPT_AsnDecodeBitsInternal(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
    BOOL ret;

    TRACE("(%p, %d, 0x%08x, %p, %d)\n", pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, *pcbStructInfo);

    if (pbEncoded[0] == ASN_BITSTRING)
    {
        DWORD bytesNeeded, dataLen;

        if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
        {
            if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
                bytesNeeded = sizeof(CRYPT_BIT_BLOB);
            else
                bytesNeeded = dataLen - 1 + sizeof(CRYPT_BIT_BLOB);
            if (!pvStructInfo)
                *pcbStructInfo = bytesNeeded;
            else if (*pcbStructInfo < bytesNeeded)
            {
                *pcbStructInfo = bytesNeeded;
                SetLastError(ERROR_MORE_DATA);
                ret = FALSE;
            }
            else
            {
                CRYPT_BIT_BLOB *blob;

1715
                blob = pvStructInfo;
1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758
                blob->cbData = dataLen - 1;
                blob->cUnusedBits = *(pbEncoded + 1 +
                 GET_LEN_BYTES(pbEncoded[1]));
                if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
                {
                    blob->pbData = (BYTE *)pbEncoded + 2 +
                     GET_LEN_BYTES(pbEncoded[1]);
                }
                else
                {
                    assert(blob->pbData);
                    if (blob->cbData)
                    {
                        BYTE mask = 0xff << blob->cUnusedBits;

                        memcpy(blob->pbData, pbEncoded + 2 +
                         GET_LEN_BYTES(pbEncoded[1]), blob->cbData);
                        blob->pbData[blob->cbData - 1] &= mask;
                    }
                }
            }
        }
    }
    else
    {
        SetLastError(CRYPT_E_ASN1_BADTAG);
        ret = FALSE;
    }
    TRACE("returning %d (%08x)\n", ret, GetLastError());
    return ret;
}

static BOOL WINAPI CRYPT_AsnDecodeSPCLinkPointer(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
    BOOL ret = FALSE;
    DWORD dataLen;

    if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
    {
        BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
        DWORD size;
1759
        SPC_LINK **pLink = pvStructInfo;
1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790

        ret = CRYPT_AsnDecodeSPCLinkInternal(dwCertEncodingType, lpszStructType,
         pbEncoded + 1 + lenBytes, dataLen, dwFlags, NULL, &size);
        if (ret)
        {
            if (!pvStructInfo)
                *pcbStructInfo = size + sizeof(PSPC_LINK);
            else if (*pcbStructInfo < size + sizeof(PSPC_LINK))
            {
                *pcbStructInfo = size + sizeof(PSPC_LINK);
                SetLastError(ERROR_MORE_DATA);
                ret = FALSE;
            }
            else
            {
                *pcbStructInfo = size + sizeof(PSPC_LINK);
                /* Set imageData's pointer if necessary */
                if (size > sizeof(SPC_LINK))
                {
                    (*pLink)->u.pwszUrl =
                     (LPWSTR)((BYTE *)*pLink + sizeof(SPC_LINK));
                }
                ret = CRYPT_AsnDecodeSPCLinkInternal(dwCertEncodingType,
                 lpszStructType, pbEncoded + 1 + lenBytes, dataLen, dwFlags,
                 *pLink, pcbStructInfo);
            }
        }
    }
    return ret;
}

1791 1792 1793 1794
BOOL WINAPI WVTAsn1SpcPeImageDataDecode(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821
    BOOL ret = FALSE;

    TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, *pcbStructInfo);

    __TRY
    {
        struct AsnDecodeSequenceItem items[] = {
         { ASN_BITSTRING, offsetof(SPC_PE_IMAGE_DATA, Flags),
           CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), TRUE, TRUE,
           offsetof(SPC_PE_IMAGE_DATA, Flags.pbData), 0 },
         { ASN_CONSTRUCTOR | ASN_CONTEXT, offsetof(SPC_PE_IMAGE_DATA, pFile),
           CRYPT_AsnDecodeSPCLinkPointer, sizeof(PSPC_LINK), TRUE, TRUE,
           offsetof(SPC_PE_IMAGE_DATA, pFile), 0 },
        };

        ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
         sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
         pvStructInfo, pcbStructInfo, NULL);
    }
    __EXCEPT_PAGE_FAULT
    {
        SetLastError(STATUS_ACCESS_VIOLATION);
    }
    __ENDTRY
    TRACE("returning %d\n", ret);
    return ret;
1822
}
1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967

static BOOL WINAPI CRYPT_AsnDecodeOidIgnoreTag(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
    BOOL ret = TRUE;
    DWORD dataLen;

    TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, *pcbStructInfo);

    if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
    {
        BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
        DWORD bytesNeeded = sizeof(LPSTR);

        if (dataLen)
        {
            /* The largest possible string for the first two components
             * is 2.175 (= 2 * 40 + 175 = 255), so this is big enough.
             */
            char firstTwo[6];
            const BYTE *ptr;

            snprintf(firstTwo, sizeof(firstTwo), "%d.%d",
             pbEncoded[1 + lenBytes] / 40,
             pbEncoded[1 + lenBytes] - (pbEncoded[1 + lenBytes] / 40)
             * 40);
            bytesNeeded += strlen(firstTwo) + 1;
            for (ptr = pbEncoded + 2 + lenBytes; ret &&
             ptr - pbEncoded - 1 - lenBytes < dataLen; )
            {
                /* large enough for ".4000000" */
                char str[9];
                int val = 0;

                while (ptr - pbEncoded - 1 - lenBytes < dataLen &&
                 (*ptr & 0x80))
                {
                    val <<= 7;
                    val |= *ptr & 0x7f;
                    ptr++;
                }
                if (ptr - pbEncoded - 1 - lenBytes >= dataLen ||
                 (*ptr & 0x80))
                {
                    SetLastError(CRYPT_E_ASN1_CORRUPT);
                    ret = FALSE;
                }
                else
                {
                    val <<= 7;
                    val |= *ptr++;
                    snprintf(str, sizeof(str), ".%d", val);
                    bytesNeeded += strlen(str);
                }
            }
        }
        if (!pvStructInfo)
            *pcbStructInfo = bytesNeeded;
        else if (*pcbStructInfo < bytesNeeded)
        {
            *pcbStructInfo = bytesNeeded;
            SetLastError(ERROR_MORE_DATA);
            ret = FALSE;
        }
        else
        {
            if (dataLen)
            {
                const BYTE *ptr;
                LPSTR pszObjId = *(LPSTR *)pvStructInfo;

                *pszObjId = 0;
                sprintf(pszObjId, "%d.%d", pbEncoded[1 + lenBytes] / 40,
                 pbEncoded[1 + lenBytes] - (pbEncoded[1 + lenBytes] /
                 40) * 40);
                pszObjId += strlen(pszObjId);
                for (ptr = pbEncoded + 2 + lenBytes; ret &&
                 ptr - pbEncoded - 1 - lenBytes < dataLen; )
                {
                    int val = 0;

                    while (ptr - pbEncoded - 1 - lenBytes < dataLen &&
                     (*ptr & 0x80))
                    {
                        val <<= 7;
                        val |= *ptr & 0x7f;
                        ptr++;
                    }
                    val <<= 7;
                    val |= *ptr++;
                    sprintf(pszObjId, ".%d", val);
                    pszObjId += strlen(pszObjId);
                }
            }
            else
                *(LPSTR *)pvStructInfo = NULL;
            *pcbStructInfo = bytesNeeded;
        }
    }
    return ret;
}

static BOOL WINAPI CRYPT_AsnDecodeOid(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
    BOOL ret = FALSE;

    TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, *pcbStructInfo);

    if (!cbEncoded)
        SetLastError(CRYPT_E_ASN1_CORRUPT);
    else if (pbEncoded[0] == ASN_OBJECTIDENTIFIER)
        ret = CRYPT_AsnDecodeOidIgnoreTag(dwCertEncodingType, lpszStructType,
         pbEncoded, cbEncoded, dwFlags, pvStructInfo, pcbStructInfo);
    else
        SetLastError(CRYPT_E_ASN1_BADTAG);
    return ret;
}

static BOOL WINAPI CRYPT_AsnDecodeCopyBytes(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
    BOOL ret = TRUE;
    DWORD bytesNeeded = sizeof(CRYPT_OBJID_BLOB);

    TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, *pcbStructInfo);

    if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
        bytesNeeded += cbEncoded;
    if (!pvStructInfo)
        *pcbStructInfo = bytesNeeded;
    else if (*pcbStructInfo < bytesNeeded)
    {
        SetLastError(ERROR_MORE_DATA);
        *pcbStructInfo = bytesNeeded;
        ret = FALSE;
    }
    else
    {
1968
        PCRYPT_OBJID_BLOB blob = pvStructInfo;
1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986

        *pcbStructInfo = bytesNeeded;
        blob->cbData = cbEncoded;
        if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
            blob->pbData = (LPBYTE)pbEncoded;
        else
        {
            assert(blob->pbData);
            memcpy(blob->pbData, pbEncoded, blob->cbData);
        }
    }
    return ret;
}

static BOOL WINAPI CRYPT_AsnDecodeAttributeTypeValue(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
1987
    CRYPT_ATTRIBUTE_TYPE_VALUE *typeValue = pvStructInfo;
1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
    struct AsnDecodeSequenceItem items[] = {
     { ASN_OBJECTIDENTIFIER, offsetof(CRYPT_ATTRIBUTE_TYPE_VALUE, pszObjId),
       CRYPT_AsnDecodeOid, sizeof(LPSTR), FALSE, TRUE,
       offsetof(CRYPT_ATTRIBUTE_TYPE_VALUE, pszObjId), 0 },
     { 0, offsetof(CRYPT_ATTRIBUTE_TYPE_VALUE, Value),
       CRYPT_AsnDecodeCopyBytes, sizeof(CRYPT_DATA_BLOB), TRUE, TRUE,
       offsetof(CRYPT_ATTRIBUTE_TYPE_VALUE, Value.pbData), 0 },
    };

    TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, *pcbStructInfo);

    return CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
     sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, pcbStructInfo,
     typeValue ? typeValue->pszObjId : NULL);
}

static BOOL WINAPI CRYPT_AsnDecodeAlgorithmId(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
2010
    CRYPT_ALGORITHM_IDENTIFIER *algo = pvStructInfo;
2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038
    BOOL ret = TRUE;
    struct AsnDecodeSequenceItem items[] = {
     { ASN_OBJECTIDENTIFIER, offsetof(CRYPT_ALGORITHM_IDENTIFIER, pszObjId),
       CRYPT_AsnDecodeOidIgnoreTag, sizeof(LPSTR), FALSE, TRUE,
       offsetof(CRYPT_ALGORITHM_IDENTIFIER, pszObjId), 0 },
     { 0, offsetof(CRYPT_ALGORITHM_IDENTIFIER, Parameters),
       CRYPT_AsnDecodeCopyBytes, sizeof(CRYPT_OBJID_BLOB), TRUE, TRUE,
       offsetof(CRYPT_ALGORITHM_IDENTIFIER, Parameters.pbData), 0 },
    };

    TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, *pcbStructInfo);

    ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
     sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, pcbStructInfo, algo ? algo->pszObjId : NULL);
    if (ret && pvStructInfo)
    {
        TRACE("pszObjId is %p (%s)\n", algo->pszObjId,
         debugstr_a(algo->pszObjId));
    }
    return ret;
}

static BOOL WINAPI CRYPT_AsnDecodeSPCDigest(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
2039
    struct SPCDigest *digest = pvStructInfo;
2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092
    struct AsnDecodeSequenceItem items[] = {
     { ASN_SEQUENCEOF, offsetof(struct SPCDigest, DigestAlgorithm),
       CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
       FALSE, TRUE,
       offsetof(struct SPCDigest, DigestAlgorithm.pszObjId), 0 },
     { ASN_OCTETSTRING, offsetof(struct SPCDigest, Digest),
       CRYPT_AsnDecodeOctets, sizeof(CRYPT_DER_BLOB),
       FALSE, TRUE, offsetof(struct SPCDigest, Digest.pbData), 0 },
    };

    TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, *pcbStructInfo);

    return CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
     sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, pcbStructInfo,
     digest ? digest->DigestAlgorithm.pszObjId : NULL);
}

BOOL WINAPI WVTAsn1SpcIndirectDataContentDecode(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
    BOOL ret = FALSE;

    TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, *pcbStructInfo);

    __TRY
    {
        struct AsnDecodeSequenceItem items[] = {
         { ASN_SEQUENCEOF, offsetof(SPC_INDIRECT_DATA_CONTENT, Data),
           CRYPT_AsnDecodeAttributeTypeValue,
           sizeof(CRYPT_ATTRIBUTE_TYPE_VALUE), FALSE, TRUE,
           offsetof(SPC_INDIRECT_DATA_CONTENT, Data.pszObjId), 0 },
         { ASN_SEQUENCEOF, offsetof(SPC_INDIRECT_DATA_CONTENT, DigestAlgorithm),
           CRYPT_AsnDecodeSPCDigest, sizeof(struct SPCDigest),
           FALSE, TRUE,
           offsetof(SPC_INDIRECT_DATA_CONTENT, DigestAlgorithm.pszObjId), 0 },
        };

        ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
         sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
         pvStructInfo, pcbStructInfo, NULL);
    }
    __EXCEPT_PAGE_FAULT
    {
        SetLastError(STATUS_ACCESS_VIOLATION);
    }
    __ENDTRY
    TRACE("returning %d\n", ret);
    return ret;
}
2093

2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131
static BOOL WINAPI CRYPT_AsnDecodeBMPString(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
    BOOL ret;
    DWORD bytesNeeded, dataLen;

    if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
    {
        BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);

        bytesNeeded = dataLen + 2 + sizeof(LPWSTR);
        if (!pvStructInfo)
            *pcbStructInfo = bytesNeeded;
        else if (*pcbStructInfo < bytesNeeded)
        {
            *pcbStructInfo = bytesNeeded;
            SetLastError(ERROR_MORE_DATA);
            ret = FALSE;
        }
        else
        {
            LPWSTR str;
            DWORD i;

            *pcbStructInfo = bytesNeeded;
            assert(pvStructInfo);
            str = *(LPWSTR *)pvStructInfo;
            for (i = 0; i < dataLen / 2; i++)
                str[i] = (pbEncoded[1 + lenBytes + 2 * i] << 8) |
                 pbEncoded[1 + lenBytes + 2 * i + 1];
            /* Decoded string is always NULL-terminated */
            str[i] = '\0';
        }
    }
    return ret;
}

2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191
static BOOL WINAPI CRYPT_AsnDecodeProgramName(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
    BOOL ret = FALSE;
    DWORD dataLen;

    TRACE("(%p, %d, %08x, %p, %d)\n", pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, pvStructInfo ? *pcbStructInfo : 0);

    if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
    {
        BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);

        ret = CRYPT_AsnDecodeBMPString(dwCertEncodingType, lpszStructType,
         pbEncoded + 1 + lenBytes, dataLen, dwFlags, pvStructInfo,
         pcbStructInfo);
    }
    return ret;
}

BOOL WINAPI WVTAsn1SpcSpOpusInfoDecode(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
    BOOL ret = FALSE;

    TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
     pvStructInfo, *pcbStructInfo);

    __TRY
    {
        struct AsnDecodeSequenceItem items[] = {
         { ASN_CONSTRUCTOR | ASN_CONTEXT,
           offsetof(SPC_SP_OPUS_INFO, pwszProgramName),
           CRYPT_AsnDecodeProgramName, sizeof(LPCWSTR), TRUE, TRUE,
           offsetof(SPC_SP_OPUS_INFO, pwszProgramName), 0 },
         { ASN_CONSTRUCTOR | ASN_CONTEXT | 1,
           offsetof(SPC_SP_OPUS_INFO, pMoreInfo),
           CRYPT_AsnDecodeSPCLinkPointer, sizeof(PSPC_LINK), TRUE, TRUE,
           offsetof(SPC_SP_OPUS_INFO, pMoreInfo), 0 },
         { ASN_CONSTRUCTOR | ASN_CONTEXT | 2,
           offsetof(SPC_SP_OPUS_INFO, pPublisherInfo),
           CRYPT_AsnDecodeSPCLinkPointer, sizeof(PSPC_LINK), TRUE, TRUE,
           offsetof(SPC_SP_OPUS_INFO, pPublisherInfo), 0 },
        };

        ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
         sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
         pvStructInfo, pcbStructInfo, NULL);
    }
    __EXCEPT_PAGE_FAULT
    {
        SetLastError(STATUS_ACCESS_VIOLATION);
    }
    __ENDTRY
    TRACE("returning %d\n", ret);
    return ret;
}

2192 2193 2194 2195
/* Ignores tag.  Only allows integers 4 bytes or smaller in size. */
static BOOL WINAPI CRYPT_AsnDecodeInt(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
2196 2197
{
    BOOL ret;
2198
    DWORD dataLen;
2199 2200 2201 2202 2203

    if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
    {
        BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);

2204
        if (dataLen > sizeof(int))
2205
        {
2206
            SetLastError(CRYPT_E_ASN1_LARGE);
2207 2208
            ret = FALSE;
        }
2209
        else if (!pvStructInfo)
2210 2211 2212 2213 2214 2215 2216 2217 2218
            *pcbStructInfo = sizeof(int);
        else if (*pcbStructInfo < sizeof(int))
        {
            *pcbStructInfo = sizeof(int);
            SetLastError(ERROR_MORE_DATA);
            ret = FALSE;
        }
        else
        {
2219 2220
            int val;
            DWORD i;
2221 2222

            *pcbStructInfo = sizeof(int);
2223
            if (dataLen && pbEncoded[1 + lenBytes] & 0x80)
2224 2225 2226 2227 2228 2229
            {
                /* initialize to a negative value to sign-extend */
                val = -1;
            }
            else
                val = 0;
2230
            for (i = 0; i < dataLen; i++)
2231 2232
            {
                val <<= 8;
2233
                val |= pbEncoded[1 + lenBytes + i];
2234 2235 2236 2237 2238 2239 2240
            }
            memcpy(pvStructInfo, &val, sizeof(int));
        }
    }
    return ret;
}

2241 2242 2243 2244
BOOL WINAPI WVTAsn1CatMemberInfoDecode(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
2245 2246 2247
    BOOL ret = FALSE;

    TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2248
     pvStructInfo, *pcbStructInfo);
2249 2250 2251 2252 2253 2254 2255 2256

    __TRY
    {
        struct AsnDecodeSequenceItem items[] = {
         { ASN_BMPSTRING, offsetof(CAT_MEMBERINFO, pwszSubjGuid),
           CRYPT_AsnDecodeBMPString, sizeof(LPWSTR), FALSE, TRUE,
           offsetof(CAT_MEMBERINFO, pwszSubjGuid), 0 },
         { ASN_INTEGER, offsetof(CAT_MEMBERINFO, dwCertVersion),
2257
           CRYPT_AsnDecodeInt, FINALMEMBERSIZE(CAT_MEMBERINFO, dwCertVersion),
2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271
           FALSE, FALSE, 0, 0 },
        };

        ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
         sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
         pvStructInfo, pcbStructInfo, NULL);
    }
    __EXCEPT_PAGE_FAULT
    {
        SetLastError(STATUS_ACCESS_VIOLATION);
    }
    __ENDTRY
    TRACE("returning %d\n", ret);
    return ret;
2272
}
2273 2274 2275 2276 2277

BOOL WINAPI WVTAsn1CatNameValueDecode(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
2278 2279 2280
    BOOL ret = FALSE;

    TRACE("%p, %d, %08x, %p, %d\n", pbEncoded, cbEncoded, dwFlags,
2281
     pvStructInfo, *pcbStructInfo);
2282 2283 2284 2285 2286 2287 2288 2289

    __TRY
    {
        struct AsnDecodeSequenceItem items[] = {
         { ASN_BMPSTRING, offsetof(CAT_NAMEVALUE, pwszTag),
           CRYPT_AsnDecodeBMPString, sizeof(LPWSTR), FALSE, TRUE,
           offsetof(CAT_NAMEVALUE, pwszTag), 0 },
         { ASN_INTEGER, offsetof(CAT_NAMEVALUE, fdwFlags),
2290 2291
           CRYPT_AsnDecodeInt, MEMBERSIZE(CAT_NAMEVALUE, fdwFlags, Value),
           FALSE, FALSE, 0, 0 },
2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307
         { ASN_OCTETSTRING, offsetof(CAT_NAMEVALUE, Value),
           CRYPT_AsnDecodeOctets, sizeof(CRYPT_DER_BLOB), FALSE, TRUE,
           offsetof(CAT_NAMEVALUE, Value.pbData), 0 },
        };

        ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
         sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
         pvStructInfo, pcbStructInfo, NULL);
    }
    __EXCEPT_PAGE_FAULT
    {
        SetLastError(STATUS_ACCESS_VIOLATION);
    }
    __ENDTRY
    TRACE("returning %d\n", ret);
    return ret;
2308
}
2309

2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351
static BOOL WINAPI CRYPT_AsnDecodeBool(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
    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 (!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;
}

2352 2353 2354 2355
BOOL WINAPI WVTAsn1SpcFinancialCriteriaInfoDecode(DWORD dwCertEncodingType,
 LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
 void *pvStructInfo, DWORD *pcbStructInfo)
{
2356 2357 2358
    BOOL ret = FALSE;

    TRACE("(%p, %d, %08x, %p, %d)\n", pbEncoded, cbEncoded, dwFlags,
2359
     pvStructInfo, *pcbStructInfo);
2360 2361 2362 2363 2364

    __TRY
    {
        struct AsnDecodeSequenceItem items[] = {
         { ASN_BOOL, offsetof(SPC_FINANCIAL_CRITERIA, fFinancialInfoAvailable),
2365 2366
           CRYPT_AsnDecodeBool, MEMBERSIZE(SPC_FINANCIAL_CRITERIA,
           fFinancialInfoAvailable, fMeetsCriteria), FALSE, FALSE, 0, 0 },
2367
         { ASN_BOOL, offsetof(SPC_FINANCIAL_CRITERIA, fMeetsCriteria),
2368 2369
           CRYPT_AsnDecodeBool, FINALMEMBERSIZE(SPC_FINANCIAL_CRITERIA,
           fMeetsCriteria), FALSE, FALSE, 0, 0 },
2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382
        };

        ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
         sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
         pvStructInfo, pcbStructInfo, NULL);
    }
    __EXCEPT_PAGE_FAULT
    {
        SetLastError(STATUS_ACCESS_VIOLATION);
    }
    __ENDTRY
    TRACE("returning %d\n", ret);
    return ret;
2383
}