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goma/wine/e8a316eaff5754759e2d6c019cc8b019fa543403/./dlls/crypt32/encode.c
blob: 121569f6158728662fccb740d2139e580f106b1b [file]
/*
* Copyright 2002 Mike McCormack for CodeWeavers
* Copyright 2005 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* This file implements ASN.1 DER encoding and 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 is
* undocumented, 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:
* http://msdn.microsoft.com/library/en-us/seccrypto/security/constants_for_cryptencodeobject_and_cryptdecodeobject.asp
*/
#include <assert.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#define NONAMELESSUNION
#include "windef.h"
#include "winbase.h"
#include "excpt.h"
#include "wincrypt.h"
#include "winreg.h"
#include "snmp.h"
#include "wine/debug.h"
#include "wine/exception.h"
/* This is a bit arbitrary, but to set some limit: */
#define MAX_ENCODED_LEN 0x02000000
/* a few asn.1 tags we need */
#define ASN_BOOL (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x01)
#define ASN_BITSTRING (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x03)
#define ASN_OCTETSTRING (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x04)
#define ASN_ENUMERATED (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x0a)
#define ASN_SETOF (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x11)
#define ASN_NUMERICSTRING (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x12)
#define ASN_PRINTABLESTRING (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x13)
#define ASN_IA5STRING (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x16)
#define ASN_UTCTIME (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x17)
#define ASN_GENERALTIME (ASN_UNIVERSAL | ASN_PRIMITIVE | 0x18)
#define ASN_FLAGS_MASK 0xf0
#define ASN_TYPE_MASK 0x0f
WINE_DEFAULT_DEBUG_CHANNEL(crypt);
static const WCHAR szDllName[] = { 'D','l','l',0 };
typedef BOOL (WINAPI *CryptEncodeObjectFunc)(DWORD, LPCSTR, const void *,
BYTE *, DWORD *);
typedef BOOL (WINAPI *CryptEncodeObjectExFunc)(DWORD, LPCSTR, const void *,
DWORD, PCRYPT_ENCODE_PARA, BYTE *, DWORD *);
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 *);
/* Prototypes for built-in encoders/decoders. They follow the Ex style
* prototypes. The dwCertEncodingType and lpszStructType are ignored by the
* built-in functions, but the parameters are retained to simplify
* CryptEncodeObjectEx/CryptDecodeObjectEx, since they must call functions in
* external DLLs that follow these signatures.
* FIXME: some built-in functions are suitable to be called directly by
* CryptEncodeObjectEx/CryptDecodeObjectEx (they implement exception handling
* and memory allocation if requested), others are only suitable to be called
* internally. Comment which are which.
*/
static BOOL WINAPI CRYPT_AsnEncodeOid(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded);
static BOOL WINAPI CRYPT_AsnEncodeExtensions(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded);
static BOOL WINAPI CRYPT_AsnEncodeBool(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded);
static BOOL WINAPI CRYPT_AsnEncodePubKeyInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded);
static BOOL WINAPI CRYPT_AsnEncodeOctets(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded);
static BOOL WINAPI CRYPT_AsnEncodeBits(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded);
static BOOL WINAPI CRYPT_AsnEncodeBitsSwapBytes(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded);
static BOOL WINAPI CRYPT_AsnEncodeInt(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded);
static BOOL WINAPI CRYPT_AsnEncodeInteger(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded);
static BOOL WINAPI CRYPT_AsnEncodeChoiceOfTime(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded);
static BOOL WINAPI CRYPT_AsnDecodeChoiceOfTime(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
static BOOL WINAPI CRYPT_AsnDecodePubKeyInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
/* Like CRYPT_AsnDecodeExtensions, except assumes rgExtension is set ahead of
* time, doesn't do memory allocation, and doesn't do exception handling.
* (This isn't intended to be the externally-called one.)
*/
static BOOL WINAPI CRYPT_AsnDecodeExtensionsInternal(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
static BOOL WINAPI CRYPT_AsnDecodeOid(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, LPSTR pszObjId, DWORD *pcbObjId);
/* Assumes algo->Parameters.pbData is set ahead of time */
static BOOL WINAPI CRYPT_AsnDecodeAlgorithmId(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
static BOOL WINAPI CRYPT_AsnDecodeBool(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
static BOOL WINAPI CRYPT_AsnDecodeOctets(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
/* Like CRYPT_AsnDecodeBits, but assumes the CRYPT_INTEGER_BLOB's pbData
* member has been initialized, doesn't do exception handling, and doesn't do
* memory allocation.
*/
static BOOL WINAPI CRYPT_AsnDecodeBitsInternal(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
static BOOL WINAPI CRYPT_AsnDecodeBits(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
static BOOL WINAPI CRYPT_AsnDecodeInt(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
/* 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.
*/
static BOOL WINAPI CRYPT_AsnDecodeIntegerInternal(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo);
/* filter for page-fault exceptions */
static WINE_EXCEPTION_FILTER(page_fault)
{
if (GetExceptionCode() == EXCEPTION_ACCESS_VIOLATION)
return EXCEPTION_EXECUTE_HANDLER;
return EXCEPTION_CONTINUE_SEARCH;
}
static char *CRYPT_GetKeyName(DWORD dwEncodingType, LPCSTR pszFuncName,
LPCSTR pszOID)
{
static const char szEncodingTypeFmt[] =
"Software\\Microsoft\\Cryptography\\OID\\EncodingType %ld\\%s\\%s";
UINT len;
char numericOID[7]; /* enough for "#65535" */
const char *oid;
LPSTR szKey;
/* MSDN says the encoding type is a mask, but it isn't treated that way.
* (E.g., if dwEncodingType were 3, the key names "EncodingType 1" and
* "EncodingType 2" would be expected if it were a mask. Instead native
* stores values in "EncodingType 3".
*/
if (!HIWORD(pszOID))
{
snprintf(numericOID, sizeof(numericOID), "#%d", (int)pszOID);
oid = numericOID;
}
else
oid = pszOID;
/* This is enough: the lengths of the two string parameters are explicitly
* counted, and we need up to five additional characters for the encoding
* type. These are covered by the "%d", "%s", and "%s" characters in the
* format specifier that are removed by sprintf.
*/
len = sizeof(szEncodingTypeFmt) + lstrlenA(pszFuncName) + lstrlenA(oid);
szKey = HeapAlloc(GetProcessHeap(), 0, len);
if (szKey)
sprintf(szKey, szEncodingTypeFmt, dwEncodingType, pszFuncName, oid);
return szKey;
}
BOOL WINAPI CryptRegisterOIDFunction(DWORD dwEncodingType, LPCSTR pszFuncName,
LPCSTR pszOID, LPCWSTR pwszDll, LPCSTR pszOverrideFuncName)
{
LONG r;
HKEY hKey;
LPSTR szKey;
TRACE("%lx %s %s %s %s\n", dwEncodingType, pszFuncName, pszOID,
debugstr_w(pwszDll), pszOverrideFuncName);
/* This only registers functions for encoding certs, not messages */
if (!GET_CERT_ENCODING_TYPE(dwEncodingType))
return TRUE;
/* Native does nothing pwszDll is NULL */
if (!pwszDll)
return TRUE;
/* I'm not matching MS bug for bug here, because I doubt any app depends on
* it:
* - native "succeeds" if pszFuncName is NULL, but the nonsensical entry
* it creates would never be used
* - native returns an HRESULT rather than a Win32 error if pszOID is NULL.
* Instead I disallow both of these with ERROR_INVALID_PARAMETER.
*/
if (!pszFuncName || !pszOID)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
szKey = CRYPT_GetKeyName(dwEncodingType, pszFuncName, pszOID);
TRACE("Key name is %s\n", debugstr_a(szKey));
if (!szKey)
return FALSE;
r = RegCreateKeyA(HKEY_LOCAL_MACHINE, szKey, &hKey);
HeapFree(GetProcessHeap(), 0, szKey);
if(r != ERROR_SUCCESS)
return FALSE;
/* write the values */
if (pszOverrideFuncName)
RegSetValueExA(hKey, "FuncName", 0, REG_SZ, (const BYTE*)pszOverrideFuncName,
lstrlenA(pszOverrideFuncName) + 1);
RegSetValueExW(hKey, szDllName, 0, REG_SZ, (const BYTE*) pwszDll,
(lstrlenW(pwszDll) + 1) * sizeof (WCHAR));
RegCloseKey(hKey);
return TRUE;
}
BOOL WINAPI CryptUnregisterOIDFunction(DWORD dwEncodingType, LPCSTR pszFuncName,
LPCSTR pszOID)
{
LPSTR szKey;
LONG rc;
TRACE("%lx %s %s\n", dwEncodingType, pszFuncName, pszOID);
if (!GET_CERT_ENCODING_TYPE(dwEncodingType))
return TRUE;
if (!pszFuncName || !pszOID)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
szKey = CRYPT_GetKeyName(dwEncodingType, pszFuncName, pszOID);
rc = RegDeleteKeyA(HKEY_LOCAL_MACHINE, szKey);
HeapFree(GetProcessHeap(), 0, szKey);
if (rc)
SetLastError(rc);
return rc ? FALSE : TRUE;
}
BOOL WINAPI CryptGetOIDFunctionValue(DWORD dwEncodingType, LPCSTR pszFuncName,
LPCSTR pszOID, LPCWSTR pwszValueName, DWORD *pdwValueType, BYTE *pbValueData,
DWORD *pcbValueData)
{
LPSTR szKey;
LONG rc;
HKEY hKey;
TRACE("%lx %s %s %s %p %p %p\n", dwEncodingType, debugstr_a(pszFuncName),
debugstr_a(pszOID), debugstr_w(pwszValueName), pdwValueType, pbValueData,
pcbValueData);
if (!GET_CERT_ENCODING_TYPE(dwEncodingType))
return TRUE;
if (!pszFuncName || !pszOID || !pwszValueName)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
szKey = CRYPT_GetKeyName(dwEncodingType, pszFuncName, pszOID);
rc = RegOpenKeyA(HKEY_LOCAL_MACHINE, szKey, &hKey);
HeapFree(GetProcessHeap(), 0, szKey);
if (rc)
SetLastError(rc);
else
{
rc = RegQueryValueExW(hKey, pwszValueName, NULL, pdwValueType,
pbValueData, pcbValueData);
if (rc)
SetLastError(rc);
RegCloseKey(hKey);
}
return rc ? FALSE : TRUE;
}
BOOL WINAPI CryptSetOIDFunctionValue(DWORD dwEncodingType, LPCSTR pszFuncName,
LPCSTR pszOID, LPCWSTR pwszValueName, DWORD dwValueType,
const BYTE *pbValueData, DWORD cbValueData)
{
LPSTR szKey;
LONG rc;
HKEY hKey;
TRACE("%lx %s %s %s %ld %p %ld\n", dwEncodingType, debugstr_a(pszFuncName),
debugstr_a(pszOID), debugstr_w(pwszValueName), dwValueType, pbValueData,
cbValueData);
if (!GET_CERT_ENCODING_TYPE(dwEncodingType))
return TRUE;
if (!pszFuncName || !pszOID || !pwszValueName)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
szKey = CRYPT_GetKeyName(dwEncodingType, pszFuncName, pszOID);
rc = RegOpenKeyA(HKEY_LOCAL_MACHINE, szKey, &hKey);
HeapFree(GetProcessHeap(), 0, szKey);
if (rc)
SetLastError(rc);
else
{
rc = RegSetValueExW(hKey, pwszValueName, 0, dwValueType, pbValueData,
cbValueData);
if (rc)
SetLastError(rc);
RegCloseKey(hKey);
}
return rc ? FALSE : TRUE;
}
/* Gets the registered function named szFuncName for dwCertEncodingType and
* lpszStructType, or NULL if one could not be found. *lib will be set to the
* handle of the module it's in, or NULL if no module was loaded. If the
* return value is NULL, *lib will also be NULL, to simplify error handling.
*/
static void *CRYPT_GetFunc(DWORD dwCertEncodingType, LPCSTR lpszStructType,
LPCSTR szFuncName, HMODULE *lib)
{
void *ret = NULL;
char *szKey = CRYPT_GetKeyName(dwCertEncodingType, szFuncName,
lpszStructType);
const char *funcName;
long r;
HKEY hKey;
DWORD type, size = 0;
TRACE("(%08lx %s %s %p)\n", dwCertEncodingType, debugstr_a(lpszStructType),
debugstr_a(szFuncName), lib);
*lib = NULL;
r = RegOpenKeyA(HKEY_LOCAL_MACHINE, szKey, &hKey);
HeapFree(GetProcessHeap(), 0, szKey);
if(r != ERROR_SUCCESS)
return NULL;
RegQueryValueExA(hKey, "FuncName", NULL, &type, NULL, &size);
if (GetLastError() == ERROR_MORE_DATA && type == REG_SZ)
{
funcName = HeapAlloc(GetProcessHeap(), 0, size);
RegQueryValueExA(hKey, "FuncName", NULL, &type, (LPBYTE)funcName,
&size);
}
else
funcName = szFuncName;
RegQueryValueExW(hKey, szDllName, NULL, &type, NULL, &size);
if (GetLastError() == ERROR_MORE_DATA && type == REG_SZ)
{
LPWSTR dllName = HeapAlloc(GetProcessHeap(), 0, size);
RegQueryValueExW(hKey, szDllName, NULL, &type, (LPBYTE)dllName,
&size);
*lib = LoadLibraryW(dllName);
if (*lib)
{
ret = GetProcAddress(*lib, funcName);
if (!ret)
{
/* Unload the library, the caller doesn't want to unload it
* when the return value is NULL.
*/
FreeLibrary(*lib);
*lib = NULL;
}
}
HeapFree(GetProcessHeap(), 0, dllName);
}
if (funcName != szFuncName)
HeapFree(GetProcessHeap(), 0, (char *)funcName);
TRACE("returning %p\n", ret);
return ret;
}
BOOL WINAPI CryptEncodeObject(DWORD dwCertEncodingType, LPCSTR lpszStructType,
const void *pvStructInfo, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret = FALSE;
HMODULE lib;
CryptEncodeObjectFunc pCryptEncodeObject;
TRACE("(0x%08lx, %s, %p, %p, %p)\n", dwCertEncodingType,
debugstr_a(lpszStructType), pvStructInfo, pbEncoded,
pcbEncoded);
if (!pbEncoded && !pcbEncoded)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
/* Try registered DLL first.. */
pCryptEncodeObject =
(CryptEncodeObjectFunc)CRYPT_GetFunc(dwCertEncodingType,
lpszStructType, "CryptEncodeObject", &lib);
if (pCryptEncodeObject)
{
ret = pCryptEncodeObject(dwCertEncodingType, lpszStructType,
pvStructInfo, pbEncoded, pcbEncoded);
FreeLibrary(lib);
}
else
{
/* If not, use CryptEncodeObjectEx */
ret = CryptEncodeObjectEx(dwCertEncodingType, lpszStructType,
pvStructInfo, 0, NULL, pbEncoded, pcbEncoded);
}
return ret;
}
/* Helper function to check *pcbEncoded, set it to the required size, and
* optionally to allocate memory. Assumes pbEncoded is not NULL.
* If CRYPT_ENCODE_ALLOC_FLAG is set in dwFlags, *pbEncoded will be set to a
* pointer to the newly allocated memory.
*/
static BOOL CRYPT_EncodeEnsureSpace(DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded,
DWORD bytesNeeded)
{
BOOL ret = TRUE;
if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG)
{
if (pEncodePara && pEncodePara->pfnAlloc)
*(BYTE **)pbEncoded = pEncodePara->pfnAlloc(bytesNeeded);
else
*(BYTE **)pbEncoded = LocalAlloc(0, bytesNeeded);
if (!*(BYTE **)pbEncoded)
ret = FALSE;
else
*pcbEncoded = bytesNeeded;
}
else if (bytesNeeded > *pcbEncoded)
{
*pcbEncoded = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
return ret;
}
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;
}
struct AsnEncodeSequenceItem
{
const void *pvStructInfo;
CryptEncodeObjectExFunc encodeFunc;
DWORD size; /* used during encoding, not for your use */
};
static BOOL WINAPI CRYPT_AsnEncodeSequence(DWORD dwCertEncodingType,
struct AsnEncodeSequenceItem items[], DWORD cItem, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
DWORD i, dataLen = 0;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", items, cItem, dwFlags, pEncodePara,
pbEncoded, *pcbEncoded);
for (i = 0, ret = TRUE; ret && i < cItem; i++)
{
ret = items[i].encodeFunc(dwCertEncodingType, NULL,
items[i].pvStructInfo, dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL,
NULL, &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 ((ret = CRYPT_EncodeEnsureSpace(dwFlags, pEncodePara, pbEncoded,
pcbEncoded, bytesNeeded)))
{
if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG)
pbEncoded = *(BYTE **)pbEncoded;
*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, dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG,
NULL, pbEncoded, &items[i].size);
pbEncoded += items[i].size;
}
}
}
}
TRACE("returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
struct AsnConstructedItem
{
BYTE tag;
const void *pvStructInfo;
CryptEncodeObjectExFunc encodeFunc;
};
static BOOL WINAPI CRYPT_AsnEncodeConstructed(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
const struct AsnConstructedItem *item =
(const struct AsnConstructedItem *)pvStructInfo;
DWORD len;
if ((ret = item->encodeFunc(dwCertEncodingType, lpszStructType,
item->pvStructInfo, dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, NULL, &len)))
{
DWORD dataLen, bytesNeeded;
CRYPT_EncodeLen(len, NULL, &dataLen);
bytesNeeded = 1 + dataLen + len;
if (!pbEncoded)
*pcbEncoded = bytesNeeded;
else if ((ret = CRYPT_EncodeEnsureSpace(dwFlags, pEncodePara,
pbEncoded, pcbEncoded, bytesNeeded)))
{
if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG)
pbEncoded = *(BYTE **)pbEncoded;
*pbEncoded++ = ASN_CONTEXT | ASN_CONSTRUCTOR | item->tag;
CRYPT_EncodeLen(len, pbEncoded, &dataLen);
pbEncoded += dataLen;
ret = item->encodeFunc(dwCertEncodingType, lpszStructType,
item->pvStructInfo, dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL,
pbEncoded, &len);
}
}
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeCertVersion(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
const DWORD *ver = (const DWORD *)pvStructInfo;
BOOL ret;
/* CERT_V1 is not encoded */
if (*ver == CERT_V1)
{
*pcbEncoded = 0;
ret = TRUE;
}
else
{
struct AsnConstructedItem item = { 0, ver, CRYPT_AsnEncodeInt };
ret = CRYPT_AsnEncodeConstructed(dwCertEncodingType, X509_INTEGER,
&item, dwFlags, pEncodePara, pbEncoded, pcbEncoded);
}
return ret;
}
static BOOL WINAPI CRYPT_CopyEncodedBlob(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
const CRYPT_DER_BLOB *blob = (const CRYPT_DER_BLOB *)pvStructInfo;
BOOL ret;
if (!pbEncoded)
{
*pcbEncoded = blob->cbData;
ret = TRUE;
}
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;
ret = TRUE;
}
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeValidity(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
/* This has two filetimes in a row, a NotBefore and a NotAfter */
const FILETIME *timePtr = (const FILETIME *)pvStructInfo;
struct AsnEncodeSequenceItem items[] = {
{ timePtr++, CRYPT_AsnEncodeChoiceOfTime, 0 },
{ timePtr, CRYPT_AsnEncodeChoiceOfTime, 0 },
};
ret = CRYPT_AsnEncodeSequence(dwCertEncodingType, items,
sizeof(items) / sizeof(items[0]), dwFlags, pEncodePara, pbEncoded,
pcbEncoded);
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeAlgorithmId(
DWORD dwCertEncodingType, LPCSTR lpszStructType, const void *pvStructInfo,
DWORD dwFlags, PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded,
DWORD *pcbEncoded)
{
const CRYPT_ALGORITHM_IDENTIFIER *algo =
(const CRYPT_ALGORITHM_IDENTIFIER *)pvStructInfo;
BOOL ret;
struct AsnEncodeSequenceItem items[] = {
{ algo->pszObjId, CRYPT_AsnEncodeOid, 0 },
{ &algo->Parameters, CRYPT_CopyEncodedBlob, 0 },
};
ret = CRYPT_AsnEncodeSequence(dwCertEncodingType, items,
sizeof(items) / sizeof(items[0]), dwFlags, pEncodePara, pbEncoded,
pcbEncoded);
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodePubKeyInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
const CERT_PUBLIC_KEY_INFO *info =
(const CERT_PUBLIC_KEY_INFO *)pvStructInfo;
struct AsnEncodeSequenceItem items[] = {
{ &info->Algorithm, CRYPT_AsnEncodeAlgorithmId, 0 },
{ &info->PublicKey, CRYPT_AsnEncodeBits, 0 },
};
TRACE("Encoding public key with OID %s\n",
debugstr_a(info->Algorithm.pszObjId));
ret = CRYPT_AsnEncodeSequence(dwCertEncodingType, items,
sizeof(items) / sizeof(items[0]), dwFlags, pEncodePara, pbEncoded,
pcbEncoded);
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeCert(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
const CERT_SIGNED_CONTENT_INFO *info =
(const CERT_SIGNED_CONTENT_INFO *)pvStructInfo;
struct AsnEncodeSequenceItem items[] = {
{ &info->ToBeSigned, CRYPT_CopyEncodedBlob, 0 },
{ &info->SignatureAlgorithm, CRYPT_AsnEncodeAlgorithmId, 0 },
{ &info->Signature, CRYPT_AsnEncodeBitsSwapBytes, 0 },
};
if (dwFlags & CRYPT_ENCODE_NO_SIGNATURE_BYTE_REVERSAL_FLAG)
items[2].encodeFunc = CRYPT_AsnEncodeBits;
ret = CRYPT_AsnEncodeSequence(dwCertEncodingType, items,
sizeof(items) / sizeof(items[0]), dwFlags, pEncodePara, pbEncoded,
pcbEncoded);
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
/* Like in Windows, this blithely ignores the validity of the passed-in
* CERT_INFO, and just encodes it as-is. The resulting encoded data may not
* decode properly, see CRYPT_AsnDecodeCertInfo.
*/
static BOOL WINAPI CRYPT_AsnEncodeCertInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
const CERT_INFO *info = (const CERT_INFO *)pvStructInfo;
struct AsnEncodeSequenceItem items[10] = {
{ &info->dwVersion, CRYPT_AsnEncodeCertVersion, 0 },
{ &info->SerialNumber, CRYPT_AsnEncodeInteger, 0 },
{ &info->SignatureAlgorithm, CRYPT_AsnEncodeAlgorithmId, 0 },
{ &info->Issuer, CRYPT_CopyEncodedBlob, 0 },
{ &info->NotBefore, CRYPT_AsnEncodeValidity, 0 },
{ &info->Subject, CRYPT_CopyEncodedBlob, 0 },
{ &info->SubjectPublicKeyInfo, CRYPT_AsnEncodePubKeyInfo, 0 },
{ 0 }
};
struct AsnConstructedItem constructed[3] = { { 0 } };
DWORD cItem = 7, cConstructed = 0;
if (info->IssuerUniqueId.cbData)
{
constructed[cConstructed].tag = 1;
constructed[cConstructed].pvStructInfo = &info->IssuerUniqueId;
constructed[cConstructed].encodeFunc = CRYPT_AsnEncodeBits;
items[cItem].pvStructInfo = &constructed[cConstructed];
items[cItem].encodeFunc = CRYPT_AsnEncodeConstructed;
cConstructed++;
cItem++;
}
if (info->SubjectUniqueId.cbData)
{
constructed[cConstructed].tag = 2;
constructed[cConstructed].pvStructInfo = &info->SubjectUniqueId;
constructed[cConstructed].encodeFunc = CRYPT_AsnEncodeBits;
items[cItem].pvStructInfo = &constructed[cConstructed];
items[cItem].encodeFunc = CRYPT_AsnEncodeConstructed;
cConstructed++;
cItem++;
}
if (info->cExtension)
{
constructed[cConstructed].tag = 3;
constructed[cConstructed].pvStructInfo = &info->cExtension;
constructed[cConstructed].encodeFunc = CRYPT_AsnEncodeExtensions;
items[cItem].pvStructInfo = &constructed[cConstructed];
items[cItem].encodeFunc = CRYPT_AsnEncodeConstructed;
cConstructed++;
cItem++;
}
ret = CRYPT_AsnEncodeSequence(dwCertEncodingType, items, cItem,
dwFlags, pEncodePara, pbEncoded, pcbEncoded);
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeCRLEntry(const CRL_ENTRY *entry,
BYTE *pbEncoded, DWORD *pcbEncoded)
{
struct AsnEncodeSequenceItem items[3] = {
{ &entry->SerialNumber, CRYPT_AsnEncodeInteger, 0 },
{ &entry->RevocationDate, CRYPT_AsnEncodeChoiceOfTime, 0 },
{ 0 }
};
DWORD cItem = 2;
BOOL ret;
TRACE("%p, %p, %p\n", entry, pbEncoded, pcbEncoded);
if (entry->cExtension)
{
items[cItem].pvStructInfo = &entry->cExtension;
items[cItem].encodeFunc = CRYPT_AsnEncodeExtensions;
cItem++;
}
ret = CRYPT_AsnEncodeSequence(X509_ASN_ENCODING, items, cItem, 0, NULL,
pbEncoded, pcbEncoded);
TRACE("returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeCRLEntries(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
DWORD cCRLEntry = *(const DWORD *)pvStructInfo;
DWORD bytesNeeded, dataLen, lenBytes, i;
const CRL_ENTRY *rgCRLEntry = *(const CRL_ENTRY **)
((const BYTE *)pvStructInfo + sizeof(DWORD));
BOOL ret = TRUE;
for (i = 0, dataLen = 0; ret && i < cCRLEntry; i++)
{
DWORD size;
ret = CRYPT_AsnEncodeCRLEntry(&rgCRLEntry[i], NULL, &size);
if (ret)
dataLen += size;
}
CRYPT_EncodeLen(dataLen, NULL, &lenBytes);
bytesNeeded = 1 + lenBytes + dataLen;
if (!pbEncoded)
*pcbEncoded = bytesNeeded;
else
{
if ((ret = CRYPT_EncodeEnsureSpace(dwFlags, pEncodePara, pbEncoded,
pcbEncoded, bytesNeeded)))
{
if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG)
pbEncoded = *(BYTE **)pbEncoded;
*pbEncoded++ = ASN_SEQUENCEOF;
CRYPT_EncodeLen(dataLen, pbEncoded, &lenBytes);
pbEncoded += lenBytes;
for (i = 0; i < cCRLEntry; i++)
{
DWORD size = dataLen;
ret = CRYPT_AsnEncodeCRLEntry(&rgCRLEntry[i], pbEncoded, &size);
pbEncoded += size;
dataLen -= size;
}
}
}
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeCRLVersion(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
const DWORD *ver = (const DWORD *)pvStructInfo;
BOOL ret;
/* CRL_V1 is not encoded */
if (*ver == CRL_V1)
{
*pcbEncoded = 0;
ret = TRUE;
}
else
ret = CRYPT_AsnEncodeInt(dwCertEncodingType, X509_INTEGER, ver,
dwFlags, pEncodePara, pbEncoded, pcbEncoded);
return ret;
}
/* Like in Windows, this blithely ignores the validity of the passed-in
* CRL_INFO, and just encodes it as-is. The resulting encoded data may not
* decode properly, see CRYPT_AsnDecodeCRLInfo.
*/
static BOOL WINAPI CRYPT_AsnEncodeCRLInfo(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
const CRL_INFO *info = (const CRL_INFO *)pvStructInfo;
struct AsnEncodeSequenceItem items[7] = {
{ &info->dwVersion, CRYPT_AsnEncodeCRLVersion, 0 },
{ &info->SignatureAlgorithm, CRYPT_AsnEncodeAlgorithmId, 0 },
{ &info->Issuer, CRYPT_CopyEncodedBlob, 0 },
{ &info->ThisUpdate, CRYPT_AsnEncodeChoiceOfTime, 0 },
{ 0 }
};
struct AsnConstructedItem constructed = { 0 };
DWORD cItem = 4;
if (info->NextUpdate.dwLowDateTime || info->NextUpdate.dwHighDateTime)
{
items[cItem].pvStructInfo = &info->NextUpdate;
items[cItem].encodeFunc = CRYPT_AsnEncodeChoiceOfTime;
cItem++;
}
if (info->cCRLEntry)
{
items[cItem].pvStructInfo = &info->cCRLEntry;
items[cItem].encodeFunc = CRYPT_AsnEncodeCRLEntries;
cItem++;
}
if (info->cExtension)
{
/* FIXME: is this really constructed? if so, is this the right tag?
*/
constructed.tag = 3;
constructed.pvStructInfo = &info->cExtension;
constructed.encodeFunc = CRYPT_AsnEncodeExtensions;
items[cItem].pvStructInfo = &constructed;
items[cItem].encodeFunc = CRYPT_AsnEncodeConstructed;
cItem++;
}
ret = CRYPT_AsnEncodeSequence(dwCertEncodingType, items, cItem,
dwFlags, pEncodePara, pbEncoded, pcbEncoded);
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnEncodeExtension(CERT_EXTENSION *ext, BYTE *pbEncoded,
DWORD *pcbEncoded)
{
BOOL ret;
struct AsnEncodeSequenceItem items[3] = {
{ ext->pszObjId, CRYPT_AsnEncodeOid, 0 },
{ NULL, NULL, 0 },
{ NULL, NULL, 0 },
};
DWORD cItem = 1;
TRACE("%p, %p, %ld\n", ext, pbEncoded, *pcbEncoded);
if (ext->fCritical)
{
items[cItem].pvStructInfo = &ext->fCritical;
items[cItem].encodeFunc = CRYPT_AsnEncodeBool;
cItem++;
}
items[cItem].pvStructInfo = &ext->Value;
items[cItem].encodeFunc = CRYPT_AsnEncodeOctets;
cItem++;
ret = CRYPT_AsnEncodeSequence(X509_ASN_ENCODING, items, cItem, 0, NULL,
pbEncoded, pcbEncoded);
TRACE("returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeExtensions(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
DWORD bytesNeeded, dataLen, lenBytes, i;
const CERT_EXTENSIONS *exts = (const CERT_EXTENSIONS *)pvStructInfo;
ret = TRUE;
for (i = 0, dataLen = 0; ret && i < exts->cExtension; i++)
{
DWORD size;
ret = CRYPT_AsnEncodeExtension(&exts->rgExtension[i], NULL, &size);
if (ret)
dataLen += size;
}
CRYPT_EncodeLen(dataLen, NULL, &lenBytes);
bytesNeeded = 1 + lenBytes + dataLen;
if (!pbEncoded)
*pcbEncoded = bytesNeeded;
else
{
if ((ret = CRYPT_EncodeEnsureSpace(dwFlags, pEncodePara, pbEncoded,
pcbEncoded, bytesNeeded)))
{
if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG)
pbEncoded = *(BYTE **)pbEncoded;
*pbEncoded++ = ASN_SEQUENCEOF;
CRYPT_EncodeLen(dataLen, pbEncoded, &lenBytes);
pbEncoded += lenBytes;
for (i = 0; i < exts->cExtension; i++)
{
DWORD size = dataLen;
ret = CRYPT_AsnEncodeExtension(&exts->rgExtension[i],
pbEncoded, &size);
pbEncoded += size;
dataLen -= size;
}
}
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeOid(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
LPCSTR pszObjId = (LPCSTR)pvStructInfo;
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;
if (sscanf(pszObjId, "%d.%d.%n", &val1, &val2, &firstPos) != 2)
{
SetLastError(CRYPT_E_ASN1_ERROR);
return FALSE;
}
bytesNeeded++;
firstByte = val1 * 40 + val2;
ptr = pszObjId + firstPos;
while (ret && *ptr)
{
int pos;
/* note I assume each component is at most 32-bits long in base 2 */
if (sscanf(ptr, "%d%n", &val1, &pos) == 1)
{
if (val1 >= 0x10000000)
bytesNeeded += 5;
else if (val1 >= 0x200000)
bytesNeeded += 4;
else if (val1 >= 0x4000)
bytesNeeded += 3;
else if (val1 >= 0x80)
bytesNeeded += 2;
else
bytesNeeded += 1;
ptr += pos;
if (*ptr == '.')
ptr++;
}
else
{
SetLastError(CRYPT_E_ASN1_ERROR);
return FALSE;
}
}
CRYPT_EncodeLen(bytesNeeded, NULL, &lenBytes);
}
else
lenBytes = 1;
bytesNeeded += 1 + lenBytes;
if (pbEncoded)
{
if (*pcbEncoded < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pbEncoded++ = ASN_OBJECTIDENTIFIER;
CRYPT_EncodeLen(bytesNeeded - 1 - lenBytes, pbEncoded, &lenBytes);
pbEncoded += lenBytes;
if (pszObjId)
{
const char *ptr;
int val, pos;
*pbEncoded++ = firstByte;
ptr = pszObjId + firstPos;
while (ret && *ptr)
{
sscanf(ptr, "%d%n", &val, &pos);
{
unsigned char outBytes[5];
int numBytes, i;
if (val >= 0x10000000)
numBytes = 5;
else if (val >= 0x200000)
numBytes = 4;
else if (val >= 0x4000)
numBytes = 3;
else if (val >= 0x80)
numBytes = 2;
else
numBytes = 1;
for (i = numBytes; i > 0; i--)
{
outBytes[i - 1] = val & 0x7f;
val >>= 7;
}
for (i = 0; i < numBytes - 1; i++)
*pbEncoded++ = outBytes[i] | 0x80;
*pbEncoded++ = outBytes[i];
ptr += pos;
if (*ptr == '.')
ptr++;
}
}
}
}
}
*pcbEncoded = bytesNeeded;
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeNameValue(DWORD dwCertEncodingType,
CERT_NAME_VALUE *value, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BYTE tag;
DWORD bytesNeeded, lenBytes, encodedLen;
BOOL ret = TRUE;
switch (value->dwValueType)
{
case CERT_RDN_NUMERIC_STRING:
tag = ASN_NUMERICSTRING;
encodedLen = value->Value.cbData;
break;
case CERT_RDN_PRINTABLE_STRING:
tag = ASN_PRINTABLESTRING;
encodedLen = value->Value.cbData;
break;
case CERT_RDN_IA5_STRING:
tag = ASN_IA5STRING;
encodedLen = value->Value.cbData;
break;
case CERT_RDN_ANY_TYPE:
/* explicitly disallowed */
SetLastError(HRESULT_FROM_WIN32(ERROR_INVALID_PARAMETER));
return FALSE;
default:
FIXME("String type %ld unimplemented\n", value->dwValueType);
return FALSE;
}
CRYPT_EncodeLen(encodedLen, NULL, &lenBytes);
bytesNeeded = 1 + lenBytes + encodedLen;
if (pbEncoded)
{
if (*pcbEncoded < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pbEncoded++ = tag;
CRYPT_EncodeLen(encodedLen, pbEncoded, &lenBytes);
pbEncoded += lenBytes;
switch (value->dwValueType)
{
case CERT_RDN_NUMERIC_STRING:
case CERT_RDN_PRINTABLE_STRING:
case CERT_RDN_IA5_STRING:
memcpy(pbEncoded, value->Value.pbData, value->Value.cbData);
}
}
}
*pcbEncoded = bytesNeeded;
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeRdnAttr(DWORD dwCertEncodingType,
CERT_RDN_ATTR *attr, BYTE *pbEncoded, DWORD *pcbEncoded)
{
DWORD bytesNeeded = 0, lenBytes, size;
BOOL ret;
ret = CRYPT_AsnEncodeOid(dwCertEncodingType, NULL, attr->pszObjId,
0, NULL, NULL, &size);
if (ret)
{
bytesNeeded += size;
/* hack: a CERT_RDN_ATTR is identical to a CERT_NAME_VALUE beginning
* with dwValueType, so "cast" it to get its encoded size
*/
ret = CRYPT_AsnEncodeNameValue(dwCertEncodingType,
(CERT_NAME_VALUE *)&attr->dwValueType, NULL, &size);
if (ret)
{
bytesNeeded += size;
CRYPT_EncodeLen(bytesNeeded, NULL, &lenBytes);
bytesNeeded += 1 + lenBytes;
if (pbEncoded)
{
if (*pcbEncoded < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pbEncoded++ = ASN_CONSTRUCTOR | ASN_SEQUENCE;
CRYPT_EncodeLen(bytesNeeded - lenBytes - 1, pbEncoded,
&lenBytes);
pbEncoded += lenBytes;
size = bytesNeeded - 1 - lenBytes;
ret = CRYPT_AsnEncodeOid(dwCertEncodingType, NULL,
attr->pszObjId, 0, NULL, pbEncoded, &size);
if (ret)
{
pbEncoded += size;
size = bytesNeeded - 1 - lenBytes - size;
ret = CRYPT_AsnEncodeNameValue(dwCertEncodingType,
(CERT_NAME_VALUE *)&attr->dwValueType, pbEncoded,
&size);
}
}
}
*pcbEncoded = bytesNeeded;
}
}
return ret;
}
static int BLOBComp(const void *l, const void *r)
{
CRYPT_DER_BLOB *a = (CRYPT_DER_BLOB *)l, *b = (CRYPT_DER_BLOB *)r;
int ret;
if (!(ret = memcmp(a->pbData, b->pbData, min(a->cbData, b->cbData))))
ret = a->cbData - b->cbData;
return ret;
}
/* This encodes as a SET OF, which in DER must be lexicographically sorted.
*/
static BOOL WINAPI CRYPT_AsnEncodeRdn(DWORD dwCertEncodingType, CERT_RDN *rdn,
BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
CRYPT_DER_BLOB *blobs = NULL;
__TRY
{
DWORD bytesNeeded = 0, lenBytes, i;
ret = TRUE;
if (rdn->cRDNAttr)
{
blobs = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
rdn->cRDNAttr * sizeof(CRYPT_DER_BLOB));
if (!blobs)
ret = FALSE;
}
for (i = 0; ret && i < rdn->cRDNAttr; i++)
{
ret = CRYPT_AsnEncodeRdnAttr(dwCertEncodingType, &rdn->rgRDNAttr[i],
NULL, &blobs[i].cbData);
if (ret)
bytesNeeded += blobs[i].cbData;
}
if (ret)
{
CRYPT_EncodeLen(bytesNeeded, NULL, &lenBytes);
bytesNeeded += 1 + lenBytes;
if (pbEncoded)
{
if (*pcbEncoded < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
for (i = 0; ret && i < rdn->cRDNAttr; i++)
{
blobs[i].pbData = HeapAlloc(GetProcessHeap(), 0,
blobs[i].cbData);
if (!blobs[i].pbData)
ret = FALSE;
else
ret = CRYPT_AsnEncodeRdnAttr(dwCertEncodingType,
&rdn->rgRDNAttr[i], blobs[i].pbData,
&blobs[i].cbData);
}
if (ret)
{
qsort(blobs, rdn->cRDNAttr, sizeof(CRYPT_DER_BLOB),
BLOBComp);
*pbEncoded++ = ASN_CONSTRUCTOR | ASN_SETOF;
CRYPT_EncodeLen(bytesNeeded - lenBytes - 1, pbEncoded,
&lenBytes);
pbEncoded += lenBytes;
for (i = 0; ret && i < rdn->cRDNAttr; i++)
{
memcpy(pbEncoded, blobs[i].pbData, blobs[i].cbData);
pbEncoded += blobs[i].cbData;
}
}
}
}
*pcbEncoded = bytesNeeded;
}
if (blobs)
{
for (i = 0; i < rdn->cRDNAttr; i++)
HeapFree(GetProcessHeap(), 0, blobs[i].pbData);
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
HeapFree(GetProcessHeap(), 0, blobs);
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeName(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
const CERT_NAME_INFO *info = (const CERT_NAME_INFO *)pvStructInfo;
DWORD bytesNeeded = 0, lenBytes, size, i;
TRACE("encoding name with %ld RDNs\n", info->cRDN);
ret = TRUE;
for (i = 0; ret && i < info->cRDN; i++)
{
ret = CRYPT_AsnEncodeRdn(dwCertEncodingType, &info->rgRDN[i], NULL,
&size);
if (ret)
bytesNeeded += size;
}
CRYPT_EncodeLen(bytesNeeded, NULL, &lenBytes);
bytesNeeded += 1 + lenBytes;
if (ret)
{
if (!pbEncoded)
*pcbEncoded = bytesNeeded;
else
{
if ((ret = CRYPT_EncodeEnsureSpace(dwFlags, pEncodePara,
pbEncoded, pcbEncoded, bytesNeeded)))
{
if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG)
pbEncoded = *(BYTE **)pbEncoded;
*pbEncoded++ = ASN_SEQUENCEOF;
CRYPT_EncodeLen(bytesNeeded - lenBytes - 1, pbEncoded,
&lenBytes);
pbEncoded += lenBytes;
for (i = 0; ret && i < info->cRDN; i++)
{
size = bytesNeeded;
ret = CRYPT_AsnEncodeRdn(dwCertEncodingType,
&info->rgRDN[i], pbEncoded, &size);
if (ret)
{
pbEncoded += size;
bytesNeeded -= size;
}
}
}
}
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeBool(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, 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 (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL CRYPT_AsnEncodeAltNameEntry(const CERT_ALT_NAME_ENTRY *entry,
BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
DWORD dataLen;
ret = TRUE;
switch (entry->dwAltNameChoice)
{
case CERT_ALT_NAME_RFC822_NAME:
case CERT_ALT_NAME_DNS_NAME:
case CERT_ALT_NAME_URL:
if (entry->u.pwszURL)
{
DWORD i;
/* Not + 1: don't encode the NULL-terminator */
dataLen = lstrlenW(entry->u.pwszURL);
for (i = 0; ret && i < dataLen; i++)
{
if (entry->u.pwszURL[i] > 0x7f)
{
SetLastError(CRYPT_E_INVALID_IA5_STRING);
ret = FALSE;
*pcbEncoded = i;
}
}
}
else
dataLen = 0;
break;
case CERT_ALT_NAME_IP_ADDRESS:
dataLen = entry->u.IPAddress.cbData;
break;
case CERT_ALT_NAME_REGISTERED_ID:
/* FIXME: encode OID */
case CERT_ALT_NAME_OTHER_NAME:
case CERT_ALT_NAME_DIRECTORY_NAME:
FIXME("name type %ld unimplemented\n", entry->dwAltNameChoice);
return FALSE;
default:
SetLastError(HRESULT_FROM_WIN32(ERROR_INVALID_PARAMETER));
return FALSE;
}
if (ret)
{
DWORD bytesNeeded, lenBytes;
CRYPT_EncodeLen(dataLen, NULL, &lenBytes);
bytesNeeded = 1 + dataLen + lenBytes;
if (!pbEncoded)
*pcbEncoded = bytesNeeded;
else if (*pcbEncoded < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
*pcbEncoded = bytesNeeded;
ret = FALSE;
}
else
{
*pbEncoded++ = ASN_CONTEXT | (entry->dwAltNameChoice - 1);
CRYPT_EncodeLen(dataLen, pbEncoded, &lenBytes);
pbEncoded += lenBytes;
switch (entry->dwAltNameChoice)
{
case CERT_ALT_NAME_RFC822_NAME:
case CERT_ALT_NAME_DNS_NAME:
case CERT_ALT_NAME_URL:
{
DWORD i;
for (i = 0; i < dataLen; i++)
*pbEncoded++ = (BYTE)entry->u.pwszURL[i];
break;
}
case CERT_ALT_NAME_IP_ADDRESS:
memcpy(pbEncoded, entry->u.IPAddress.pbData, dataLen);
break;
}
if (ret)
*pcbEncoded = bytesNeeded;
}
}
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeAltName(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
const CERT_ALT_NAME_INFO *info =
(const CERT_ALT_NAME_INFO *)pvStructInfo;
DWORD bytesNeeded, dataLen, lenBytes, i;
ret = TRUE;
/* FIXME: should check that cAltEntry is not bigger than 0xff, since we
* can't encode an erroneous entry index if it's bigger than this.
*/
for (i = 0, dataLen = 0; ret && i < info->cAltEntry; i++)
{
DWORD len;
ret = CRYPT_AsnEncodeAltNameEntry(&info->rgAltEntry[i], NULL,
&len);
if (ret)
dataLen += len;
}
if (ret)
{
CRYPT_EncodeLen(dataLen, NULL, &lenBytes);
bytesNeeded = 1 + lenBytes + dataLen;
if (!pbEncoded)
{
*pcbEncoded = bytesNeeded;
ret = TRUE;
}
else
{
if ((ret = CRYPT_EncodeEnsureSpace(dwFlags, pEncodePara,
pbEncoded, pcbEncoded, bytesNeeded)))
{
if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG)
pbEncoded = *(BYTE **)pbEncoded;
*pbEncoded++ = ASN_SEQUENCEOF;
CRYPT_EncodeLen(dataLen, pbEncoded, &lenBytes);
pbEncoded += lenBytes;
for (i = 0; ret && i < info->cAltEntry; i++)
{
DWORD len = dataLen;
ret = CRYPT_AsnEncodeAltNameEntry(&info->rgAltEntry[i],
pbEncoded, &len);
if (ret)
{
pbEncoded += len;
dataLen -= len;
}
else if (GetLastError() == CRYPT_E_INVALID_IA5_STRING)
{
/* CRYPT_AsnEncodeAltNameEntry encoded the index of
* the bad character, now set the index of the bad
* entry
*/
*pcbEncoded |= (BYTE)i <<
CERT_ALT_NAME_ENTRY_ERR_INDEX_SHIFT;
}
}
}
}
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeBasicConstraints2(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
const CERT_BASIC_CONSTRAINTS2_INFO *info =
(const CERT_BASIC_CONSTRAINTS2_INFO *)pvStructInfo;
struct AsnEncodeSequenceItem items[2] = { { 0 } };
DWORD cItem = 0;
if (info->fCA)
{
items[cItem].pvStructInfo = &info->fCA;
items[cItem].encodeFunc = CRYPT_AsnEncodeBool;
cItem++;
}
if (info->fPathLenConstraint)
{
items[cItem].pvStructInfo = &info->dwPathLenConstraint;
items[cItem].encodeFunc = CRYPT_AsnEncodeInt;
cItem++;
}
ret = CRYPT_AsnEncodeSequence(dwCertEncodingType, items, cItem,
dwFlags, pEncodePara, pbEncoded, pcbEncoded);
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeOctets(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
const CRYPT_DATA_BLOB *blob = (const CRYPT_DATA_BLOB *)pvStructInfo;
DWORD bytesNeeded, lenBytes;
TRACE("(%ld, %p), %08lx, %p, %p, %ld\n", blob->cbData, blob->pbData,
dwFlags, pEncodePara, pbEncoded, *pcbEncoded);
CRYPT_EncodeLen(blob->cbData, NULL, &lenBytes);
bytesNeeded = 1 + lenBytes + blob->cbData;
if (!pbEncoded)
{
*pcbEncoded = bytesNeeded;
ret = TRUE;
}
else
{
if ((ret = CRYPT_EncodeEnsureSpace(dwFlags, pEncodePara, pbEncoded,
pcbEncoded, bytesNeeded)))
{
if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG)
pbEncoded = *(BYTE **)pbEncoded;
*pbEncoded++ = ASN_OCTETSTRING;
CRYPT_EncodeLen(blob->cbData, pbEncoded, &lenBytes);
pbEncoded += lenBytes;
if (blob->cbData)
memcpy(pbEncoded, blob->pbData, blob->cbData);
}
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
TRACE("returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeBits(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
const CRYPT_BIT_BLOB *blob = (const CRYPT_BIT_BLOB *)pvStructInfo;
DWORD bytesNeeded, lenBytes, dataBytes;
BYTE unusedBits;
/* yep, MS allows cUnusedBits to be >= 8 */
if (!blob->cUnusedBits)
{
dataBytes = blob->cbData;
unusedBits = 0;
}
else if (blob->cbData * 8 > blob->cUnusedBits)
{
dataBytes = (blob->cbData * 8 - blob->cUnusedBits) / 8 + 1;
unusedBits = blob->cUnusedBits >= 8 ? blob->cUnusedBits / 8 :
blob->cUnusedBits;
}
else
{
dataBytes = 0;
unusedBits = 0;
}
CRYPT_EncodeLen(dataBytes + 1, NULL, &lenBytes);
bytesNeeded = 1 + lenBytes + dataBytes + 1;
if (!pbEncoded)
{
*pcbEncoded = bytesNeeded;
ret = TRUE;
}
else
{
if ((ret = CRYPT_EncodeEnsureSpace(dwFlags, pEncodePara, pbEncoded,
pcbEncoded, bytesNeeded)))
{
if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG)
pbEncoded = *(BYTE **)pbEncoded;
*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);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeBitsSwapBytes(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
const CRYPT_BIT_BLOB *blob = (const CRYPT_BIT_BLOB *)pvStructInfo;
CRYPT_BIT_BLOB newBlob = { blob->cbData, NULL, blob->cUnusedBits };
ret = TRUE;
if (newBlob.cbData)
{
newBlob.pbData = HeapAlloc(GetProcessHeap(), 0, newBlob.cbData);
if (newBlob.pbData)
{
DWORD i;
for (i = 0; i < newBlob.cbData; i++)
newBlob.pbData[newBlob.cbData - i - 1] = blob->pbData[i];
}
else
ret = FALSE;
}
if (ret)
ret = CRYPT_AsnEncodeBits(dwCertEncodingType, lpszStructType,
&newBlob, dwFlags, pEncodePara, pbEncoded, pcbEncoded);
HeapFree(GetProcessHeap(), 0, newBlob.pbData);
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeInt(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
CRYPT_INTEGER_BLOB blob = { sizeof(INT), (BYTE *)pvStructInfo };
return CRYPT_AsnEncodeInteger(dwCertEncodingType, X509_MULTI_BYTE_INTEGER,
&blob, dwFlags, pEncodePara, pbEncoded, pcbEncoded);
}
static BOOL WINAPI CRYPT_AsnEncodeInteger(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
DWORD significantBytes, lenBytes;
BYTE padByte = 0, bytesNeeded;
BOOL pad = FALSE;
const CRYPT_INTEGER_BLOB *blob =
(const CRYPT_INTEGER_BLOB *)pvStructInfo;
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 ((ret = CRYPT_EncodeEnsureSpace(dwFlags, pEncodePara, pbEncoded,
pcbEncoded, bytesNeeded)))
{
if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG)
pbEncoded = *(BYTE **)pbEncoded;
*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];
}
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeUnsignedInteger(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
DWORD significantBytes, lenBytes;
BYTE bytesNeeded;
BOOL pad = FALSE;
const CRYPT_INTEGER_BLOB *blob =
(const CRYPT_INTEGER_BLOB *)pvStructInfo;
significantBytes = blob->cbData;
if (significantBytes)
{
/* 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)
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 ((ret = CRYPT_EncodeEnsureSpace(dwFlags, pEncodePara, pbEncoded,
pcbEncoded, bytesNeeded)))
{
if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG)
pbEncoded = *(BYTE **)pbEncoded;
*pbEncoded++ = ASN_INTEGER;
if (pad)
{
CRYPT_EncodeLen(significantBytes + 1, pbEncoded, &lenBytes);
pbEncoded += lenBytes;
*pbEncoded++ = 0;
}
else
{
CRYPT_EncodeLen(significantBytes, pbEncoded, &lenBytes);
pbEncoded += lenBytes;
}
for (; significantBytes > 0; significantBytes--)
*(pbEncoded++) = blob->pbData[significantBytes - 1];
}
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeEnumerated(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
CRYPT_INTEGER_BLOB blob;
BOOL ret;
/* Encode as an unsigned integer, then change the tag to enumerated */
blob.cbData = sizeof(DWORD);
blob.pbData = (BYTE *)pvStructInfo;
ret = CRYPT_AsnEncodeUnsignedInteger(dwCertEncodingType,
X509_MULTI_BYTE_UINT, &blob, dwFlags, pEncodePara, pbEncoded, pcbEncoded);
if (ret && pbEncoded)
{
if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG)
pbEncoded = *(BYTE **)pbEncoded;
pbEncoded[0] = ASN_ENUMERATED;
}
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeUtcTime(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
SYSTEMTIME sysTime;
/* sorry, magic number: enough for tag, len, YYMMDDHHMMSSZ\0. I use a
* temporary buffer because the output buffer is not NULL-terminated.
*/
char buf[16];
static const DWORD bytesNeeded = sizeof(buf) - 1;
if (!pbEncoded)
{
*pcbEncoded = bytesNeeded;
ret = TRUE;
}
else
{
/* Sanity check the year, this is a two-digit year format */
ret = FileTimeToSystemTime((const FILETIME *)pvStructInfo,
&sysTime);
if (ret && (sysTime.wYear < 1950 || sysTime.wYear > 2050))
{
SetLastError(CRYPT_E_BAD_ENCODE);
ret = FALSE;
}
if (ret)
{
if ((ret = CRYPT_EncodeEnsureSpace(dwFlags, pEncodePara,
pbEncoded, pcbEncoded, bytesNeeded)))
{
if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG)
pbEncoded = *(BYTE **)pbEncoded;
buf[0] = ASN_UTCTIME;
buf[1] = bytesNeeded - 2;
snprintf(buf + 2, sizeof(buf) - 2,
"%02d%02d%02d%02d%02d%02dZ", sysTime.wYear >= 2000 ?
sysTime.wYear - 2000 : sysTime.wYear - 1900,
sysTime.wDay, sysTime.wMonth, sysTime.wHour,
sysTime.wMinute, sysTime.wSecond);
memcpy(pbEncoded, buf, bytesNeeded);
}
}
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeGeneralizedTime(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
SYSTEMTIME sysTime;
/* sorry, magic number: enough for tag, len, YYYYMMDDHHMMSSZ\0. I use a
* temporary buffer because the output buffer is not NULL-terminated.
*/
char buf[18];
static const DWORD bytesNeeded = sizeof(buf) - 1;
if (!pbEncoded)
{
*pcbEncoded = bytesNeeded;
ret = TRUE;
}
else
{
ret = FileTimeToSystemTime((const FILETIME *)pvStructInfo,
&sysTime);
if (ret)
ret = CRYPT_EncodeEnsureSpace(dwFlags, pEncodePara, pbEncoded,
pcbEncoded, bytesNeeded);
if (ret)
{
if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG)
pbEncoded = *(BYTE **)pbEncoded;
buf[0] = ASN_GENERALTIME;
buf[1] = bytesNeeded - 2;
snprintf(buf + 2, sizeof(buf) - 2, "%04d%02d%02d%02d%02d%02dZ",
sysTime.wYear, sysTime.wDay, sysTime.wMonth, sysTime.wHour,
sysTime.wMinute, sysTime.wSecond);
memcpy(pbEncoded, buf, bytesNeeded);
}
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeChoiceOfTime(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
SYSTEMTIME sysTime;
/* Check the year, if it's in the UTCTime range call that encode func */
if (!FileTimeToSystemTime((const FILETIME *)pvStructInfo, &sysTime))
return FALSE;
if (sysTime.wYear >= 1950 && sysTime.wYear <= 2050)
ret = CRYPT_AsnEncodeUtcTime(dwCertEncodingType, lpszStructType,
pvStructInfo, dwFlags, pEncodePara, pbEncoded, pcbEncoded);
else
ret = CRYPT_AsnEncodeGeneralizedTime(dwCertEncodingType,
lpszStructType, pvStructInfo, dwFlags, pEncodePara, pbEncoded,
pcbEncoded);
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnEncodeSequenceOfAny(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const void *pvStructInfo, DWORD dwFlags,
PCRYPT_ENCODE_PARA pEncodePara, BYTE *pbEncoded, DWORD *pcbEncoded)
{
BOOL ret;
__TRY
{
DWORD bytesNeeded, dataLen, lenBytes, i;
const CRYPT_SEQUENCE_OF_ANY *seq =
(const CRYPT_SEQUENCE_OF_ANY *)pvStructInfo;
for (i = 0, dataLen = 0; i < seq->cValue; i++)
dataLen += seq->rgValue[i].cbData;
CRYPT_EncodeLen(dataLen, NULL, &lenBytes);
bytesNeeded = 1 + lenBytes + dataLen;
if (!pbEncoded)
{
*pcbEncoded = bytesNeeded;
ret = TRUE;
}
else
{
if ((ret = CRYPT_EncodeEnsureSpace(dwFlags, pEncodePara, pbEncoded,
pcbEncoded, bytesNeeded)))
{
if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG)
pbEncoded = *(BYTE **)pbEncoded;
*pbEncoded++ = ASN_SEQUENCEOF;
CRYPT_EncodeLen(dataLen, pbEncoded, &lenBytes);
pbEncoded += lenBytes;
for (i = 0; i < seq->cValue; i++)
{
memcpy(pbEncoded, seq->rgValue[i].pbData,
seq->rgValue[i].cbData);
pbEncoded += seq->rgValue[i].cbData;
}
}
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
BOOL WINAPI CryptEncodeObjectEx(DWORD dwCertEncodingType, LPCSTR lpszStructType,
const void *pvStructInfo, DWORD dwFlags, PCRYPT_ENCODE_PARA pEncodePara,
void *pvEncoded, DWORD *pcbEncoded)
{
BOOL ret = FALSE;
HMODULE lib = NULL;
CryptEncodeObjectExFunc encodeFunc = NULL;
TRACE("(0x%08lx, %s, %p, 0x%08lx, %p, %p, %p)\n", dwCertEncodingType,
debugstr_a(lpszStructType), pvStructInfo, dwFlags, pEncodePara,
pvEncoded, pcbEncoded);
if (!pvEncoded && !pcbEncoded)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
if ((dwCertEncodingType & CERT_ENCODING_TYPE_MASK) != X509_ASN_ENCODING
&& (dwCertEncodingType & CMSG_ENCODING_TYPE_MASK) != PKCS_7_ASN_ENCODING)
{
SetLastError(ERROR_FILE_NOT_FOUND);
return FALSE;
}
SetLastError(NOERROR);
if (dwFlags & CRYPT_ENCODE_ALLOC_FLAG && pvEncoded)
*(BYTE **)pvEncoded = NULL;
if (!HIWORD(lpszStructType))
{
switch (LOWORD(lpszStructType))
{
case (WORD)X509_CERT:
encodeFunc = CRYPT_AsnEncodeCert;
break;
case (WORD)X509_CERT_TO_BE_SIGNED:
encodeFunc = CRYPT_AsnEncodeCertInfo;
break;
case (WORD)X509_CERT_CRL_TO_BE_SIGNED:
encodeFunc = CRYPT_AsnEncodeCRLInfo;
break;
case (WORD)X509_EXTENSIONS:
encodeFunc = CRYPT_AsnEncodeExtensions;
break;
case (WORD)X509_NAME:
encodeFunc = CRYPT_AsnEncodeName;
break;
case (WORD)X509_PUBLIC_KEY_INFO:
encodeFunc = CRYPT_AsnEncodePubKeyInfo;
break;
case (WORD)X509_ALTERNATE_NAME:
encodeFunc = CRYPT_AsnEncodeAltName;
break;
case (WORD)X509_BASIC_CONSTRAINTS2:
encodeFunc = CRYPT_AsnEncodeBasicConstraints2;
break;
case (WORD)X509_OCTET_STRING:
encodeFunc = CRYPT_AsnEncodeOctets;
break;
case (WORD)X509_BITS:
case (WORD)X509_KEY_USAGE:
encodeFunc = CRYPT_AsnEncodeBits;
break;
case (WORD)X509_INTEGER:
encodeFunc = CRYPT_AsnEncodeInt;
break;
case (WORD)X509_MULTI_BYTE_INTEGER:
encodeFunc = CRYPT_AsnEncodeInteger;
break;
case (WORD)X509_MULTI_BYTE_UINT:
encodeFunc = CRYPT_AsnEncodeUnsignedInteger;
break;
case (WORD)X509_ENUMERATED:
encodeFunc = CRYPT_AsnEncodeEnumerated;
break;
case (WORD)X509_CHOICE_OF_TIME:
encodeFunc = CRYPT_AsnEncodeChoiceOfTime;
break;
case (WORD)X509_SEQUENCE_OF_ANY:
encodeFunc = CRYPT_AsnEncodeSequenceOfAny;
break;
case (WORD)PKCS_UTC_TIME:
encodeFunc = CRYPT_AsnEncodeUtcTime;
break;
default:
FIXME("%d: unimplemented\n", LOWORD(lpszStructType));
}
}
else if (!strcmp(lpszStructType, szOID_CERT_EXTENSIONS))
encodeFunc = CRYPT_AsnEncodeExtensions;
else if (!strcmp(lpszStructType, szOID_RSA_signingTime))
encodeFunc = CRYPT_AsnEncodeUtcTime;
else if (!strcmp(lpszStructType, szOID_CRL_REASON_CODE))
encodeFunc = CRYPT_AsnEncodeEnumerated;
else if (!strcmp(lpszStructType, szOID_KEY_USAGE))
encodeFunc = CRYPT_AsnEncodeBits;
else if (!strcmp(lpszStructType, szOID_SUBJECT_KEY_IDENTIFIER))
encodeFunc = CRYPT_AsnEncodeOctets;
else if (!strcmp(lpszStructType, szOID_BASIC_CONSTRAINTS2))
encodeFunc = CRYPT_AsnEncodeBasicConstraints2;
else if (!strcmp(lpszStructType, szOID_ISSUER_ALT_NAME))
encodeFunc = CRYPT_AsnEncodeAltName;
else if (!strcmp(lpszStructType, szOID_ISSUER_ALT_NAME2))
encodeFunc = CRYPT_AsnEncodeAltName;
else if (!strcmp(lpszStructType, szOID_NEXT_UPDATE_LOCATION))
encodeFunc = CRYPT_AsnEncodeAltName;
else if (!strcmp(lpszStructType, szOID_SUBJECT_ALT_NAME))
encodeFunc = CRYPT_AsnEncodeAltName;
else if (!strcmp(lpszStructType, szOID_SUBJECT_ALT_NAME2))
encodeFunc = CRYPT_AsnEncodeAltName;
else
TRACE("OID %s not found or unimplemented, looking for DLL\n",
debugstr_a(lpszStructType));
if (!encodeFunc)
encodeFunc = (CryptEncodeObjectExFunc)CRYPT_GetFunc(dwCertEncodingType,
lpszStructType, "CryptEncodeObjectEx", &lib);
if (encodeFunc)
ret = encodeFunc(dwCertEncodingType, lpszStructType, pvStructInfo,
dwFlags, pEncodePara, pvEncoded, pcbEncoded);
else
SetLastError(ERROR_FILE_NOT_FOUND);
if (lib)
FreeLibrary(lib);
return ret;
}
BOOL WINAPI CryptDecodeObject(DWORD dwCertEncodingType, LPCSTR lpszStructType,
const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags, void *pvStructInfo,
DWORD *pcbStructInfo)
{
BOOL ret = FALSE;
HMODULE lib;
CryptDecodeObjectFunc pCryptDecodeObject;
TRACE("(0x%08lx, %s, %p, %ld, 0x%08lx, %p, %p)\n", dwCertEncodingType,
debugstr_a(lpszStructType), pbEncoded, cbEncoded, dwFlags,
pvStructInfo, pcbStructInfo);
if (!pvStructInfo && !pcbStructInfo)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
/* Try registered DLL first.. */
pCryptDecodeObject =
(CryptDecodeObjectFunc)CRYPT_GetFunc(dwCertEncodingType,
lpszStructType, "CryptDecodeObject", &lib);
if (pCryptDecodeObject)
{
ret = pCryptDecodeObject(dwCertEncodingType, lpszStructType,
pbEncoded, cbEncoded, dwFlags, pvStructInfo, pcbStructInfo);
FreeLibrary(lib);
}
else
{
/* If not, use CryptDecodeObjectEx */
ret = CryptDecodeObjectEx(dwCertEncodingType, lpszStructType, pbEncoded,
cbEncoded, dwFlags, NULL, pvStructInfo, pcbStructInfo);
}
return ret;
}
/* Gets the number of length bytes from the given (leading) length byte */
#define GET_LEN_BYTES(b) ((b) <= 0x7f ? 1 : 1 + ((b) & 0x7f))
/* Helper function to get the encoded length of the data starting at pbEncoded,
* where pbEncoded[0] is the tag. If the data are too short to contain a
* length or if the length is too large for cbEncoded, sets an appropriate
* error code and returns FALSE.
*/
static BOOL WINAPI 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)
{
*len = pbEncoded[1];
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;
}
/* 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;
}
return ret;
}
/* A few of the members need explanation:
* 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.
* hasPointer, pointerOffset, minSize:
* If the item has dynamic data, set hasPointer to TRUE, pointerOffset to
* the offset within the (outer) 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
{
DWORD offset;
CryptDecodeObjectExFunc decodeFunc;
DWORD minSize;
BOOL optional;
BOOL hasPointer;
DWORD pointerOffset;
DWORD size;
};
/* 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.
* Each item decoder is never called with CRYPT_DECODE_ALLOC_FLAG set.
* If any undecoded data are left over, fails with CRYPT_E_ASN1_CORRUPT.
* FIXME: use to decode more sequences.
*/
static BOOL CRYPT_AsnDecodeSequence(DWORD dwCertEncodingType,
struct AsnDecodeSequenceItem items[], DWORD cItem, const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, PCRYPT_DECODE_PARA pDecodePara,
void *pvStructInfo, DWORD *pcbStructInfo, void *startingPointer)
{
BOOL ret;
TRACE("%p, %ld, %p, %ld, %08lx, %p, %p, %ld\n", items, cItem, pbEncoded,
cbEncoded, dwFlags, pDecodePara, pvStructInfo, *pcbStructInfo);
if (pbEncoded[0] == ASN_SEQUENCE)
{
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD i, bytesNeeded = 0, minSize = 0;
const BYTE *ptr;
ptr = pbEncoded + 1 + lenBytes;
for (i = 0; ret && i < cItem; i++)
{
DWORD nextItemLen;
minSize += items[i].minSize;
if (cbEncoded - (ptr - pbEncoded) != 0)
{
if ((ret = CRYPT_GetLen(ptr, cbEncoded - (ptr - pbEncoded),
&nextItemLen)))
{
BYTE nextItemLenBytes = GET_LEN_BYTES(ptr[1]);
if (items[i].decodeFunc)
{
ret = items[i].decodeFunc(dwCertEncodingType, NULL,
ptr, 1 + nextItemLenBytes + nextItemLen,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL,
&items[i].size);
if (ret)
{
/* Account for alignment padding */
bytesNeeded += items[i].size;
if (items[i].size % sizeof(DWORD))
bytesNeeded += sizeof(DWORD) -
items[i].size % sizeof(DWORD);
ptr += 1 + nextItemLenBytes + nextItemLen;
}
else if (items[i].optional &&
GetLastError() == CRYPT_E_ASN1_BADTAG)
{
bytesNeeded += items[i].minSize;
SetLastError(NOERROR);
ret = TRUE;
}
}
else
bytesNeeded += items[i].minSize;
}
}
else if (items[i].optional)
bytesNeeded += items[i].minSize;
else
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
}
if (ret)
{
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 + minSize;
memset(pvStructInfo, 0, minSize);
ptr = pbEncoded + 1 + lenBytes;
for (i = 0; ret && i < cItem; i++)
{
if (cbEncoded - (ptr - pbEncoded) != 0)
{
DWORD nextItemLen;
BYTE nextItemLenBytes = GET_LEN_BYTES(ptr[1]);
CRYPT_GetLen(ptr, cbEncoded - (ptr - pbEncoded),
&nextItemLen);
if (items[i].hasPointer)
*(BYTE **)((BYTE *)pvStructInfo +
items[i].pointerOffset) = nextData;
if (items[i].decodeFunc)
ret = items[i].decodeFunc(dwCertEncodingType,
NULL, ptr, 1 + nextItemLenBytes + nextItemLen,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL,
(BYTE *)pvStructInfo + items[i].offset,
&items[i].size);
else
items[i].size = items[i].minSize;
if (ret)
{
if (items[i].hasPointer &&
items[i].size > items[i].minSize)
{
nextData += items[i].size -
items[i].minSize;
/* align nextData to DWORD boundaries */
if (items[i].size % sizeof(DWORD))
nextData += sizeof(DWORD) -
items[i].size % sizeof(DWORD);
}
ptr += 1 + nextItemLenBytes + nextItemLen;
}
else if (items[i].optional &&
GetLastError() == CRYPT_E_ASN1_BADTAG)
{
SetLastError(NOERROR);
ret = TRUE;
}
}
else if (!items[i].optional)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
}
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
TRACE("returning %d (%08lx)\n", ret, GetLastError());
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 WINAPI CRYPT_AsnDecodeDerBlob(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
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 (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
CRYPT_DER_BLOB *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 WINAPI CRYPT_AsnDecodeBitsSwapBytes(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
ret = CRYPT_AsnDecodeBitsInternal(dwCertEncodingType, lpszStructType,
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
if (ret && pvStructInfo)
{
CRYPT_BIT_BLOB *blob = (CRYPT_BIT_BLOB *)pvStructInfo;
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;
}
}
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 = TRUE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ offsetof(CERT_SIGNED_CONTENT_INFO, ToBeSigned),
CRYPT_AsnDecodeDerBlob, sizeof(CRYPT_DER_BLOB), FALSE, TRUE,
offsetof(CERT_SIGNED_CONTENT_INFO, ToBeSigned.pbData), 0 },
{ offsetof(CERT_SIGNED_CONTENT_INFO, SignatureAlgorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CERT_SIGNED_CONTENT_INFO,
SignatureAlgorithm.Parameters.pbData), 0 },
{ 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(dwCertEncodingType, items,
sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, NULL);
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeCertVersion(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
if (pbEncoded[0] == (ASN_CONTEXT | ASN_CONSTRUCTOR))
{
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
ret = CRYPT_AsnDecodeInt(dwCertEncodingType, X509_INTEGER,
pbEncoded + 1 + lenBytes, dataLen, dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo);
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeValidity(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ offsetof(CERT_PRIVATE_KEY_VALIDITY, NotBefore),
CRYPT_AsnDecodeChoiceOfTime, sizeof(FILETIME), FALSE, FALSE, 0 },
{ offsetof(CERT_PRIVATE_KEY_VALIDITY, NotAfter),
CRYPT_AsnDecodeChoiceOfTime, sizeof(FILETIME), FALSE, FALSE, 0 },
};
ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, NULL);
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;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ offsetof(CERT_INFO, dwVersion), CRYPT_AsnDecodeCertVersion,
sizeof(DWORD), TRUE, FALSE, 0, 0 },
{ offsetof(CERT_INFO, SerialNumber), CRYPT_AsnDecodeIntegerInternal,
sizeof(CRYPT_INTEGER_BLOB), FALSE, TRUE, offsetof(CERT_INFO,
SerialNumber.pbData), 0 },
{ offsetof(CERT_INFO, SignatureAlgorithm), CRYPT_AsnDecodeAlgorithmId,
sizeof(CRYPT_ALGORITHM_IDENTIFIER), FALSE, TRUE, offsetof(CERT_INFO,
SignatureAlgorithm.Parameters.pbData), 0 },
{ offsetof(CERT_INFO, Issuer), CRYPT_AsnDecodeDerBlob,
sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CERT_INFO,
Issuer.pbData) },
{ offsetof(CERT_INFO, NotBefore), CRYPT_AsnDecodeValidity,
sizeof(CERT_PRIVATE_KEY_VALIDITY), FALSE, FALSE, 0 },
{ offsetof(CERT_INFO, Subject), CRYPT_AsnDecodeDerBlob,
sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CERT_INFO,
Subject.pbData) },
{ offsetof(CERT_INFO, SubjectPublicKeyInfo), CRYPT_AsnDecodePubKeyInfo,
sizeof(CERT_PUBLIC_KEY_INFO), FALSE, TRUE, offsetof(CERT_INFO,
SubjectPublicKeyInfo.Algorithm.Parameters.pbData), 0 },
{ offsetof(CERT_INFO, IssuerUniqueId), CRYPT_AsnDecodeBitsInternal,
sizeof(CRYPT_BIT_BLOB), TRUE, TRUE, offsetof(CERT_INFO,
IssuerUniqueId.pbData), 0 },
{ offsetof(CERT_INFO, SubjectUniqueId), CRYPT_AsnDecodeBitsInternal,
sizeof(CRYPT_BIT_BLOB), TRUE, TRUE, offsetof(CERT_INFO,
SubjectUniqueId.pbData), 0 },
{ offsetof(CERT_INFO, cExtension), CRYPT_AsnDecodeExtensionsInternal,
sizeof(CERT_EXTENSIONS), TRUE, TRUE, offsetof(CERT_INFO,
rgExtension), 0 },
};
ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, NULL);
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL CRYPT_AsnDecodeCRLEntry(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, PCRL_ENTRY entry, DWORD *pcbEntry)
{
BOOL ret;
struct AsnDecodeSequenceItem items[] = {
{ offsetof(CRL_ENTRY, SerialNumber), CRYPT_AsnDecodeIntegerInternal,
sizeof(CRYPT_INTEGER_BLOB), FALSE, TRUE, offsetof(CRL_ENTRY,
SerialNumber.pbData), 0 },
{ offsetof(CRL_ENTRY, RevocationDate), CRYPT_AsnDecodeChoiceOfTime,
sizeof(FILETIME), FALSE, FALSE, 0 },
{ offsetof(CRL_ENTRY, cExtension), CRYPT_AsnDecodeExtensionsInternal,
sizeof(CERT_EXTENSIONS), TRUE, TRUE, offsetof(CRL_ENTRY,
rgExtension), 0 },
};
TRACE("%p, %ld, %08lx, %p, %ld\n", pbEncoded, cbEncoded, dwFlags, entry,
*pcbEntry);
ret = CRYPT_AsnDecodeSequence(X509_ASN_ENCODING, items,
sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
NULL, entry, pcbEntry, entry ? entry->SerialNumber.pbData : NULL);
TRACE("Returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
typedef struct _WINE_CRL_ENTRIES {
DWORD cCRLEntry;
PCRL_ENTRY rgCRLEntry;
} WINE_CRL_ENTRIES, *PWINE_CRL_ENTRIES;
/* Warning: assumes pvStructInfo is a WINE_CRL_ENTRIES whose rgCRLEntry has
* been set prior to calling.
*/
static BOOL WINAPI CRYPT_AsnDecodeCRLEntries(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
if (pbEncoded[0] == ASN_SEQUENCEOF)
{
DWORD dataLen, bytesNeeded;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
DWORD cCRLEntry = 0;
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
bytesNeeded = sizeof(WINE_CRL_ENTRIES);
if (dataLen)
{
const BYTE *ptr;
DWORD size;
for (ptr = pbEncoded + 1 + lenBytes; ret &&
ptr - pbEncoded - 1 - lenBytes < dataLen; )
{
size = 0;
ret = CRYPT_AsnDecodeCRLEntry(ptr,
cbEncoded - (ptr - pbEncoded), dwFlags, NULL, &size);
if (ret)
{
DWORD nextLen;
cCRLEntry++;
bytesNeeded += size;
ret = CRYPT_GetLen(ptr,
cbEncoded - (ptr - pbEncoded), &nextLen);
if (ret)
ptr += nextLen + 1 + GET_LEN_BYTES(ptr[1]);
}
}
}
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, bytesNeeded)))
{
DWORD size, i;
BYTE *nextData;
const BYTE *ptr;
PWINE_CRL_ENTRIES entries;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
*pcbStructInfo = bytesNeeded;
entries = (PWINE_CRL_ENTRIES)pvStructInfo;
entries->cCRLEntry = cCRLEntry;
assert(entries->rgCRLEntry);
nextData = (BYTE *)entries->rgCRLEntry +
entries->cCRLEntry * sizeof(CRL_ENTRY);
for (i = 0, ptr = pbEncoded + 1 + lenBytes; ret &&
i < cCRLEntry && ptr - pbEncoded - 1 - lenBytes <
dataLen; i++)
{
entries->rgCRLEntry[i].SerialNumber.pbData = nextData;
size = bytesNeeded;
ret = CRYPT_AsnDecodeCRLEntry(ptr,
cbEncoded - (ptr - pbEncoded), dwFlags,
&entries->rgCRLEntry[i], &size);
if (ret)
{
DWORD nextLen;
bytesNeeded -= size;
/* Increment nextData by the difference of the
* minimum size and the actual size.
*/
if (size > sizeof(CRL_ENTRY))
nextData += size - sizeof(CRL_ENTRY);
ret = CRYPT_GetLen(ptr,
cbEncoded - (ptr - pbEncoded), &nextLen);
if (ret)
ptr += nextLen + 1 + GET_LEN_BYTES(ptr[1]);
}
}
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
TRACE("Returning %d (%08lx)\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)
{
BOOL ret = TRUE;
TRACE("%p, %ld, %08lx, %p, %p, %ld\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
__TRY
{
struct AsnDecodeSequenceItem items[] = {
{ offsetof(CRL_INFO, dwVersion), CRYPT_AsnDecodeCertVersion,
sizeof(DWORD), TRUE, FALSE, 0, 0 },
{ offsetof(CRL_INFO, SignatureAlgorithm), CRYPT_AsnDecodeAlgorithmId,
sizeof(CRYPT_ALGORITHM_IDENTIFIER), FALSE, TRUE, offsetof(CRL_INFO,
SignatureAlgorithm.Parameters.pbData), 0 },
{ offsetof(CRL_INFO, Issuer), CRYPT_AsnDecodeDerBlob,
sizeof(CRYPT_DER_BLOB), FALSE, TRUE, offsetof(CRL_INFO,
Issuer.pbData) },
{ offsetof(CRL_INFO, ThisUpdate), CRYPT_AsnDecodeChoiceOfTime,
sizeof(FILETIME), FALSE, FALSE, 0 },
{ offsetof(CRL_INFO, NextUpdate), CRYPT_AsnDecodeChoiceOfTime,
sizeof(FILETIME), TRUE, FALSE, 0 },
{ offsetof(CRL_INFO, cCRLEntry), CRYPT_AsnDecodeCRLEntries,
sizeof(WINE_CRL_ENTRIES), TRUE, TRUE, offsetof(CRL_INFO,
rgCRLEntry), 0 },
/* Note that the extensions are ignored by MS, so I'll ignore them too
*/
{ offsetof(CRL_INFO, cExtension), NULL,
sizeof(CERT_EXTENSIONS), TRUE, FALSE, 0 },
};
ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, NULL);
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
TRACE("Returning %d (%08lx)\n", ret, GetLastError());
return ret;
}
/* Warning: assumes ext->Value.pbData is set ahead of time! */
static BOOL CRYPT_AsnDecodeExtension(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, CERT_EXTENSION *ext, DWORD *pcbExt)
{
BOOL ret = TRUE;
if (pbEncoded[0] == ASN_SEQUENCE)
{
DWORD dataLen, bytesNeeded;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]), oidLenBytes = 0;
bytesNeeded = sizeof(CERT_EXTENSION);
if (dataLen)
{
const BYTE *ptr = pbEncoded + 1 + lenBytes;
DWORD encodedOidLen, oidLen;
CRYPT_GetLen(ptr, cbEncoded - (ptr - pbEncoded),
&encodedOidLen);
oidLenBytes = GET_LEN_BYTES(ptr[1]);
ret = CRYPT_AsnDecodeOid(ptr, cbEncoded - (ptr - pbEncoded),
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &oidLen);
if (ret)
{
bytesNeeded += oidLen;
ptr += 1 + encodedOidLen + oidLenBytes;
if (*ptr == ASN_BOOL)
ptr += 3;
ret = CRYPT_AsnDecodeOctets(X509_ASN_ENCODING,
X509_OCTET_STRING, ptr, cbEncoded - (ptr - pbEncoded),
0, NULL, NULL, &dataLen);
bytesNeeded += dataLen;
if (ret)
{
if (!ext)
*pcbExt = bytesNeeded;
else if (*pcbExt < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
ptr = pbEncoded + 2 + lenBytes + encodedOidLen +
oidLenBytes;
if (*ptr == ASN_BOOL)
{
DWORD size = sizeof(BOOL);
CRYPT_AsnDecodeBool(X509_ASN_ENCODING, NULL,
ptr, cbEncoded - (ptr - pbEncoded),
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL,
&ext->fCritical, &size);
ptr += 3;
}
else
ext->fCritical = FALSE;
ret = CRYPT_AsnDecodeOctets(X509_ASN_ENCODING,
X509_OCTET_STRING, ptr,
cbEncoded - (ptr - pbEncoded),
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL,
&ext->Value, &dataLen);
if (ret)
{
ext->pszObjId = (LPSTR)ext->Value.pbData +
ext->Value.cbData;
ptr = pbEncoded + 1 + lenBytes;
ret = CRYPT_AsnDecodeOid(ptr,
cbEncoded - (ptr - pbEncoded),
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG,
ext->pszObjId, &oidLen);
}
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_EOD);
ret = FALSE;
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeExtensionsInternal(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
if (pbEncoded[0] == ASN_SEQUENCEOF)
{
DWORD dataLen, bytesNeeded;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
DWORD cExtension = 0;
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
bytesNeeded = sizeof(CERT_EXTENSIONS);
if (dataLen)
{
const BYTE *ptr;
DWORD size;
for (ptr = pbEncoded + 1 + lenBytes; ret &&
ptr - pbEncoded - 1 - lenBytes < dataLen; )
{
ret = CRYPT_AsnDecodeExtension(ptr,
cbEncoded - (ptr - pbEncoded), dwFlags, NULL, &size);
if (ret)
{
DWORD nextLen;
cExtension++;
bytesNeeded += size;
ret = CRYPT_GetLen(ptr,
cbEncoded - (ptr - pbEncoded), &nextLen);
if (ret)
ptr += nextLen + 1 + GET_LEN_BYTES(ptr[1]);
}
}
}
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
*pcbStructInfo = bytesNeeded;
ret = FALSE;
}
else
{
DWORD size, i;
BYTE *nextData;
const BYTE *ptr;
CERT_EXTENSIONS *exts;
*pcbStructInfo = bytesNeeded;
exts = (CERT_EXTENSIONS *)pvStructInfo;
exts->cExtension = cExtension;
assert(exts->rgExtension);
nextData = (BYTE *)exts->rgExtension +
exts->cExtension * sizeof(CERT_EXTENSION);
for (i = 0, ptr = pbEncoded + 1 + lenBytes; ret &&
i < cExtension && ptr - pbEncoded - 1 - lenBytes <
dataLen; i++)
{
exts->rgExtension[i].Value.pbData = nextData;
size = bytesNeeded;
ret = CRYPT_AsnDecodeExtension(ptr,
cbEncoded - (ptr - pbEncoded), dwFlags,
&exts->rgExtension[i], &size);
if (ret)
{
DWORD nextLen;
bytesNeeded -= size;
/* If dwFlags & CRYPT_DECODE_NOCOPY_FLAG, the
* data may not have been copied.
*/
if (exts->rgExtension[i].Value.pbData ==
nextData)
nextData +=
exts->rgExtension[i].Value.cbData;
/* Ugly: the OID, if copied, is stored in
* memory after the value, so increment by its
* string length if it's set and points here.
*/
if ((const BYTE *)exts->rgExtension[i].pszObjId
== nextData)
nextData += strlen(
exts->rgExtension[i].pszObjId) + 1;
ret = CRYPT_GetLen(ptr,
cbEncoded - (ptr - pbEncoded), &nextLen);
if (ret)
ptr += nextLen + 1 + GET_LEN_BYTES(ptr[1]);
}
}
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
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(dwCertEncodingType,
lpszStructType, pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL, pcbStructInfo);
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(dwCertEncodingType,
lpszStructType, pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pvStructInfo,
pcbStructInfo);
}
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
/* FIXME: honor the CRYPT_DECODE_SHARE_OID_STRING_FLAG. */
static BOOL WINAPI CRYPT_AsnDecodeOid(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, LPSTR pszObjId, DWORD *pcbObjId)
{
BOOL ret = TRUE;
__TRY
{
if (pbEncoded[0] == ASN_OBJECTIDENTIFIER)
{
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
DWORD bytesNeeded;
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 (!pszObjId)
*pcbObjId = bytesNeeded;
else if (*pcbObjId < bytesNeeded)
{
*pcbObjId = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
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
bytesNeeded = 0;
*pcbObjId = bytesNeeded;
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
}
__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 WINAPI CRYPT_AsnDecodeNameValue(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, CERT_NAME_VALUE *value, DWORD *pcbValue)
{
BOOL ret = TRUE;
__TRY
{
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
switch (pbEncoded[0])
{
case ASN_NUMERICSTRING:
case ASN_PRINTABLESTRING:
case ASN_IA5STRING:
break;
default:
FIXME("Unimplemented string type %02x\n", pbEncoded[0]);
SetLastError(OSS_UNIMPLEMENTED);
ret = FALSE;
}
if (ret)
{
DWORD bytesNeeded = sizeof(CERT_NAME_VALUE);
switch (pbEncoded[0])
{
case ASN_NUMERICSTRING:
case ASN_PRINTABLESTRING:
case ASN_IA5STRING:
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += dataLen;
break;
}
if (!value)
*pcbValue = bytesNeeded;
else if (*pcbValue < bytesNeeded)
{
*pcbValue = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
*pcbValue = bytesNeeded;
switch (pbEncoded[0])
{
case ASN_NUMERICSTRING:
value->dwValueType = CERT_RDN_NUMERIC_STRING;
break;
case ASN_PRINTABLESTRING:
value->dwValueType = CERT_RDN_PRINTABLE_STRING;
break;
case ASN_IA5STRING:
value->dwValueType = CERT_RDN_IA5_STRING;
break;
}
if (dataLen)
{
switch (pbEncoded[0])
{
case ASN_NUMERICSTRING:
case ASN_PRINTABLESTRING:
case ASN_IA5STRING:
value->Value.cbData = dataLen;
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
value->Value.pbData = (BYTE *)pbEncoded + 1 +
lenBytes;
else
{
assert(value->Value.pbData);
memcpy(value->Value.pbData,
pbEncoded + 1 + lenBytes, dataLen);
}
break;
}
}
else
{
value->Value.cbData = 0;
value->Value.pbData = NULL;
}
}
}
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeRdnAttr(const BYTE *pbEncoded,
DWORD cbEncoded, DWORD dwFlags, CERT_RDN_ATTR *attr, DWORD *pcbAttr)
{
BOOL ret;
__TRY
{
if (pbEncoded[0] == (ASN_CONSTRUCTOR | ASN_SEQUENCE))
{
DWORD bytesNeeded, dataLen, size;
BYTE lenBytes;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
/* The data length must be at least 4, two for the tag and
* length for the OID, and two for the string (assuming both
* have short-form lengths.)
*/
if (dataLen < 4)
{
SetLastError(CRYPT_E_ASN1_EOD);
ret = FALSE;
}
else
{
bytesNeeded = sizeof(CERT_RDN_ATTR);
lenBytes = GET_LEN_BYTES(pbEncoded[1]);
ret = CRYPT_AsnDecodeOid(pbEncoded + 1 + lenBytes,
cbEncoded - 1 - lenBytes, dwFlags, NULL, &size);
if (ret)
{
/* ugly: need to know the size of the next element of
* the sequence, so get it directly
*/
DWORD objIdOfset = 1 + lenBytes, objIdLen,
nameValueOffset = 0;
ret = CRYPT_GetLen(pbEncoded + objIdOfset,
cbEncoded - objIdOfset, &objIdLen);
bytesNeeded += size;
/* hack: like encoding, this takes advantage of the
* fact that the rest of the structure is identical to
* a CERT_NAME_VALUE.
*/
if (ret)
{
nameValueOffset = objIdOfset + objIdLen + 1 +
GET_LEN_BYTES(pbEncoded[objIdOfset]);
ret = CRYPT_AsnDecodeNameValue(
pbEncoded + nameValueOffset,
cbEncoded - nameValueOffset, dwFlags, NULL, &size);
}
if (ret)
{
bytesNeeded += size;
if (!attr)
*pcbAttr = bytesNeeded;
else if (*pcbAttr < bytesNeeded)
{
*pcbAttr = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
BYTE *originalData = attr->Value.pbData;
*pcbAttr = bytesNeeded;
/* strange: decode the value first, because it
* has a counted size, and we can store the OID
* after it. Keep track of the original data
* pointer, we'll need to know whether it was
* changed.
*/
size = bytesNeeded;
ret = CRYPT_AsnDecodeNameValue(
pbEncoded + nameValueOffset,
cbEncoded - nameValueOffset, dwFlags,
(CERT_NAME_VALUE *)&attr->dwValueType, &size);
if (ret)
{
if (objIdLen)
{
/* if the data were copied to the
* original location, the OID goes
* after. Otherwise it goes in the
* spot originally reserved for the
* data.
*/
if (attr->Value.pbData == originalData)
attr->pszObjId =
(LPSTR)(attr->Value.pbData +
attr->Value.cbData);
else
attr->pszObjId = (LPSTR)originalData;
size = bytesNeeded - size;
ret = CRYPT_AsnDecodeOid(
pbEncoded + objIdOfset,
cbEncoded - objIdOfset,
dwFlags, attr->pszObjId, &size);
}
else
attr->pszObjId = NULL;
}
}
}
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeRdn(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, CERT_RDN *rdn, DWORD *pcbRdn)
{
BOOL ret = TRUE;
__TRY
{
if (pbEncoded[0] == (ASN_CONSTRUCTOR | ASN_SETOF))
{
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
DWORD bytesNeeded, cRDNAttr = 0;
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
bytesNeeded = sizeof(CERT_RDN);
if (dataLen)
{
const BYTE *ptr;
DWORD size;
for (ptr = pbEncoded + 1 + lenBytes; ret &&
ptr - pbEncoded - 1 - lenBytes < dataLen; )
{
ret = CRYPT_AsnDecodeRdnAttr(ptr,
cbEncoded - (ptr - pbEncoded), dwFlags, NULL, &size);
if (ret)
{
DWORD nextLen;
cRDNAttr++;
bytesNeeded += size;
ret = CRYPT_GetLen(ptr,
cbEncoded - (ptr - pbEncoded), &nextLen);
if (ret)
ptr += nextLen + 1 + GET_LEN_BYTES(ptr[1]);
}
}
}
if (ret)
{
if (!rdn)
*pcbRdn = bytesNeeded;
else if (*pcbRdn < bytesNeeded)
{
*pcbRdn = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
DWORD size, i;
BYTE *nextData;
const BYTE *ptr;
*pcbRdn = bytesNeeded;
rdn->cRDNAttr = cRDNAttr;
rdn->rgRDNAttr = (CERT_RDN_ATTR *)((BYTE *)rdn +
sizeof(CERT_RDN));
nextData = (BYTE *)rdn->rgRDNAttr +
rdn->cRDNAttr * sizeof(CERT_RDN_ATTR);
for (i = 0, ptr = pbEncoded + 1 + lenBytes; ret &&
i < cRDNAttr && ptr - pbEncoded - 1 - lenBytes <
dataLen; i++)
{
rdn->rgRDNAttr[i].Value.pbData = nextData;
size = bytesNeeded;
ret = CRYPT_AsnDecodeRdnAttr(ptr,
cbEncoded - (ptr - pbEncoded), dwFlags,
&rdn->rgRDNAttr[i], &size);
if (ret)
{
DWORD nextLen;
bytesNeeded -= size;
/* If dwFlags & CRYPT_DECODE_NOCOPY_FLAG, the
* data may not have been copied.
*/
if (rdn->rgRDNAttr[i].Value.pbData == nextData)
nextData +=
rdn->rgRDNAttr[i].Value.cbData;
/* Ugly: the OID, if copied, is stored in
* memory after the value, so increment by its
* string length if it's set and points here.
*/
if ((const BYTE *)rdn->rgRDNAttr[i].pszObjId
== nextData)
nextData += strlen(
rdn->rgRDNAttr[i].pszObjId) + 1;
ret = CRYPT_GetLen(ptr,
cbEncoded - (ptr - pbEncoded), &nextLen);
if (ret)
ptr += nextLen + 1 + GET_LEN_BYTES(ptr[1]);
}
}
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
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
{
if (pbEncoded[0] == (ASN_CONSTRUCTOR | ASN_SEQUENCEOF))
{
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
DWORD bytesNeeded, cRDN = 0;
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
bytesNeeded = sizeof(CERT_NAME_INFO);
if (dataLen)
{
const BYTE *ptr;
for (ptr = pbEncoded + 1 + lenBytes; ret &&
ptr - pbEncoded - 1 - lenBytes < dataLen; )
{
DWORD size;
ret = CRYPT_AsnDecodeRdn(ptr,
cbEncoded - (ptr - pbEncoded), dwFlags, NULL, &size);
if (ret)
{
DWORD nextLen;
cRDN++;
bytesNeeded += size;
ret = CRYPT_GetLen(ptr,
cbEncoded - (ptr - pbEncoded), &nextLen);
if (ret)
ptr += nextLen + 1 + GET_LEN_BYTES(ptr[1]);
}
}
}
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, bytesNeeded)))
{
CERT_NAME_INFO *info;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
info = (CERT_NAME_INFO *)pvStructInfo;
info->cRDN = cRDN;
if (info->cRDN == 0)
info->rgRDN = NULL;
else
{
DWORD size, i;
BYTE *nextData;
const BYTE *ptr;
info->rgRDN = (CERT_RDN *)((BYTE *)pvStructInfo +
sizeof(CERT_NAME_INFO));
nextData = (BYTE *)info->rgRDN +
info->cRDN * sizeof(CERT_RDN);
for (i = 0, ptr = pbEncoded + 1 + lenBytes; ret &&
i < cRDN && ptr - pbEncoded - 1 - lenBytes <
dataLen; i++)
{
info->rgRDN[i].rgRDNAttr =
(CERT_RDN_ATTR *)nextData;
size = bytesNeeded;
ret = CRYPT_AsnDecodeRdn(ptr,
cbEncoded - (ptr - pbEncoded), dwFlags,
&info->rgRDN[i], &size);
if (ret)
{
DWORD nextLen;
nextData += size;
bytesNeeded -= size;
ret = CRYPT_GetLen(ptr,
cbEncoded - (ptr - pbEncoded), &nextLen);
if (ret)
ptr += nextLen + 1 +
GET_LEN_BYTES(ptr[1]);
}
}
}
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeAlgorithmId(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
CRYPT_ALGORITHM_IDENTIFIER *algo =
(CRYPT_ALGORITHM_IDENTIFIER *)pvStructInfo;
BOOL ret = TRUE;
if (pbEncoded[0] == ASN_SEQUENCE)
{
DWORD dataLen, bytesNeeded;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
bytesNeeded = sizeof(CRYPT_ALGORITHM_IDENTIFIER);
if (dataLen)
{
const BYTE *ptr = pbEncoded + 1 + lenBytes;
BYTE oidLenBytes;
DWORD encodedOidLen, oidLen;
CRYPT_GetLen(ptr, cbEncoded - (ptr - pbEncoded),
&encodedOidLen);
oidLenBytes = GET_LEN_BYTES(ptr[1]);
ret = CRYPT_AsnDecodeOid(ptr, cbEncoded - (ptr - pbEncoded),
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, &oidLen);
if (ret)
{
bytesNeeded += oidLen;
ptr += 1 + encodedOidLen + oidLenBytes;
/* The remaining bytes are just copied as-is, no decoding
* is done.
*/
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
bytesNeeded += cbEncoded - (ptr - pbEncoded);
if (!algo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
/* Get and sanity-check parameter length first */
if (dataLen - 1 - oidLenBytes - encodedOidLen != 0)
{
DWORD paramsLen;
if ((ret = CRYPT_GetLen(ptr, cbEncoded -
(ptr - pbEncoded), &paramsLen)))
{
BYTE paramsLenBytes = GET_LEN_BYTES(ptr[1]);
if (paramsLen != dataLen - encodedOidLen - 1 -
oidLenBytes - 1 - paramsLenBytes)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
}
}
if (ret)
{
*pcbStructInfo = bytesNeeded;
algo->Parameters.cbData = dataLen - 1 -
oidLenBytes - encodedOidLen;
if (algo->Parameters.cbData)
{
if (!(dwFlags & CRYPT_DECODE_NOCOPY_FLAG))
{
memcpy(algo->Parameters.pbData, ptr,
algo->Parameters.cbData);
algo->pszObjId = (LPSTR)algo->Parameters.pbData +
algo->Parameters.cbData;
}
else
{
algo->Parameters.pbData = (BYTE *)ptr;
algo->pszObjId = (LPSTR)algo->Parameters.pbData;
}
}
else
algo->pszObjId = (LPSTR)algo->Parameters.pbData;
ptr = pbEncoded + 1 + lenBytes;
ret = CRYPT_AsnDecodeOid(ptr,
cbEncoded - (ptr - pbEncoded),
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG,
algo->pszObjId, &oidLen);
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_EOD);
ret = FALSE;
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
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
{
struct AsnDecodeSequenceItem items[] = {
{ offsetof(CERT_PUBLIC_KEY_INFO, Algorithm),
CRYPT_AsnDecodeAlgorithmId, sizeof(CRYPT_ALGORITHM_IDENTIFIER),
FALSE, TRUE, offsetof(CERT_PUBLIC_KEY_INFO,
Algorithm.Parameters.pbData) },
{ offsetof(CERT_PUBLIC_KEY_INFO, PublicKey),
CRYPT_AsnDecodeBitsInternal, sizeof(CRYPT_BIT_BLOB), FALSE, TRUE,
offsetof(CERT_PUBLIC_KEY_INFO, PublicKey.pbData) },
};
ret = CRYPT_AsnDecodeSequence(dwCertEncodingType, items,
sizeof(items) / sizeof(items[0]), pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, NULL);
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeBool(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
if (cbEncoded < 3)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
return FALSE;
}
if (pbEncoded[0] != ASN_BOOL)
{
SetLastError(CRYPT_E_ASN1_BADTAG);
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
{
*(BOOL *)pvStructInfo = pbEncoded[2] ? TRUE : FALSE;
ret = TRUE;
}
return ret;
}
static BOOL CRYPT_AsnDecodeAltNameEntry(const BYTE *pbEncoded, DWORD cbEncoded,
DWORD dwFlags, CERT_ALT_NAME_ENTRY *entry, DWORD *pcbEntry)
{
DWORD dataLen, lenBytes, bytesNeeded = sizeof(CERT_ALT_NAME_ENTRY);
BOOL ret;
if (cbEncoded < 2)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
return FALSE;
}
if ((pbEncoded[0] & ASN_FLAGS_MASK) != ASN_CONTEXT)
{
SetLastError(CRYPT_E_ASN1_BADTAG);
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 7: /* iPAddress */
bytesNeeded += dataLen;
break;
case 8: /* registeredID */
/* FIXME: decode as OID */
case 0: /* otherName */
case 4: /* directoryName */
FIXME("stub\n");
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
break;
case 3: /* x400Address, unimplemented */
case 5: /* ediPartyName, unimplemented */
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
break;
default:
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
if (ret)
{
if (!entry)
*pcbEntry = bytesNeeded;
else if (*pcbEntry < bytesNeeded)
{
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
/* 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;
break;
}
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;
}
}
}
}
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;
__TRY
{
if (pbEncoded[0] == ASN_SEQUENCEOF)
{
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
DWORD bytesNeeded, cEntry = 0;
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
bytesNeeded = sizeof(CERT_ALT_NAME_INFO);
if (dataLen)
{
const BYTE *ptr;
for (ptr = pbEncoded + 1 + lenBytes; ret &&
ptr - pbEncoded - 1 - lenBytes < dataLen; )
{
DWORD size;
ret = CRYPT_AsnDecodeAltNameEntry(ptr,
cbEncoded - (ptr - pbEncoded), dwFlags, NULL, &size);
if (ret)
{
DWORD nextLen;
cEntry++;
bytesNeeded += size;
ret = CRYPT_GetLen(ptr,
cbEncoded - (ptr - pbEncoded), &nextLen);
if (ret)
ptr += nextLen + 1 + GET_LEN_BYTES(ptr[1]);
}
}
}
if (ret)
{
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo, bytesNeeded)))
{
CERT_ALT_NAME_INFO *info;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
info = (CERT_ALT_NAME_INFO *)pvStructInfo;
info->cAltEntry = 0;
if (cEntry == 0)
info->rgAltEntry = NULL;
else
{
DWORD size, i;
BYTE *nextData;
const BYTE *ptr;
info->rgAltEntry =
(CERT_ALT_NAME_ENTRY *)((BYTE *)pvStructInfo +
sizeof(CERT_ALT_NAME_INFO));
nextData = (BYTE *)info->rgAltEntry +
cEntry * sizeof(CERT_ALT_NAME_ENTRY);
for (i = 0, ptr = pbEncoded + 1 + lenBytes; ret &&
i < cEntry && ptr - pbEncoded - 1 - lenBytes <
dataLen; i++)
{
info->rgAltEntry[i].u.pwszURL = (LPWSTR)nextData;
size = bytesNeeded;
ret = CRYPT_AsnDecodeAltNameEntry(ptr,
cbEncoded - (ptr - pbEncoded), dwFlags,
&info->rgAltEntry[i], &size);
if (ret)
{
DWORD nextLen;
info->cAltEntry++;
nextData += size -
sizeof(CERT_ALT_NAME_ENTRY);
bytesNeeded -= size;
ret = CRYPT_GetLen(ptr,
cbEncoded - (ptr - pbEncoded), &nextLen);
if (ret)
ptr += nextLen + 1 +
GET_LEN_BYTES(ptr[1]);
}
}
}
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
}
__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
{
if (pbEncoded[0] == ASN_SEQUENCE)
{
DWORD dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
/* sanity-check length, space enough for 7 bytes of integer and
* 3 bytes of bool
*/
if (dataLen > 10)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
{
DWORD bytesNeeded = sizeof(CERT_BASIC_CONSTRAINTS2_INFO);
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else
{
BYTE lenBytes;
CERT_BASIC_CONSTRAINTS2_INFO info = { 0 };
lenBytes = GET_LEN_BYTES(pbEncoded[1]);
pbEncoded += 1 + lenBytes;
cbEncoded -= 1 + lenBytes;
if (cbEncoded)
{
DWORD size;
if (pbEncoded[0] == ASN_BOOL)
{
size = sizeof(BOOL);
ret = CRYPT_AsnDecodeBool(dwCertEncodingType,
NULL, pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL,
&info.fCA, &size);
if (ret)
{
cbEncoded -= 2 + pbEncoded[1];
pbEncoded += 2 + pbEncoded[1];
}
}
if (ret && cbEncoded && pbEncoded[0] == ASN_INTEGER)
{
size = sizeof(info.dwPathLenConstraint);
ret = CRYPT_AsnDecodeInt(dwCertEncodingType,
X509_INTEGER, pbEncoded, cbEncoded, 0, NULL,
&info.dwPathLenConstraint, &size);
if (ret)
{
cbEncoded -= 2 + pbEncoded[1];
pbEncoded += 2 + pbEncoded[1];
if (cbEncoded)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
info.fPathLenConstraint = TRUE;
}
}
}
if (ret)
{
if ((ret = CRYPT_DecodeEnsureSpace(dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo,
bytesNeeded)))
{
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
memcpy(pvStructInfo, &info,
sizeof(CERT_BASIC_CONSTRAINTS2_INFO));
}
}
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
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;
__TRY
{
if (pbEncoded[0] == ASN_OCTETSTRING)
{
DWORD bytesNeeded, dataLen;
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 ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
CRYPT_DATA_BLOB *blob;
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
blob = (CRYPT_DATA_BLOB *)pvStructInfo;
blob->cbData = dataLen;
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
blob->pbData = (BYTE *)pbEncoded + 1 + lenBytes;
else
{
blob->pbData = (BYTE *)pvStructInfo +
sizeof(CRYPT_DATA_BLOB);
if (blob->cbData)
memcpy(blob->pbData, pbEncoded + 1 + lenBytes,
blob->cbData);
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeBitsInternal(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
TRACE("(%p, %ld, 0x%08lx, %p, %p, %ld)\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, *pcbStructInfo);
if (pbEncoded[0] == ASN_BITSTRING)
{
DWORD bytesNeeded, dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
bytesNeeded = sizeof(CRYPT_BIT_BLOB);
else
bytesNeeded = dataLen - 1 + sizeof(CRYPT_BIT_BLOB);
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if (*pcbStructInfo < bytesNeeded)
{
*pcbStructInfo = bytesNeeded;
SetLastError(ERROR_MORE_DATA);
ret = FALSE;
}
else
{
CRYPT_BIT_BLOB *blob;
blob = (CRYPT_BIT_BLOB *)pvStructInfo;
blob->cbData = dataLen - 1;
blob->cUnusedBits = *(pbEncoded + 1 +
GET_LEN_BYTES(pbEncoded[1]));
if (dwFlags & CRYPT_DECODE_NOCOPY_FLAG)
{
blob->pbData = (BYTE *)pbEncoded + 2 +
GET_LEN_BYTES(pbEncoded[1]);
}
else
{
assert(blob->pbData);
if (blob->cbData)
{
BYTE mask = 0xff << blob->cUnusedBits;
memcpy(blob->pbData, pbEncoded + 2 +
GET_LEN_BYTES(pbEncoded[1]), blob->cbData);
blob->pbData[blob->cbData - 1] &= mask;
}
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
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, %ld, 0x%08lx, %p, %p, %p)\n", pbEncoded, cbEncoded, dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo);
__TRY
{
DWORD bytesNeeded;
if ((ret = CRYPT_AsnDecodeBitsInternal(dwCertEncodingType,
lpszStructType, pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, NULL, &bytesNeeded)))
{
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(dwCertEncodingType,
lpszStructType, pbEncoded, cbEncoded,
dwFlags & ~CRYPT_DECODE_ALLOC_FLAG, NULL, pvStructInfo,
&bytesNeeded);
}
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
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;
if (!pvStructInfo)
{
*pcbStructInfo = sizeof(int);
return TRUE;
}
__TRY
{
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(dwCertEncodingType,
X509_MULTI_BYTE_INTEGER, pbEncoded, cbEncoded, 0, NULL, &buf, &size);
if (ret)
{
if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, sizeof(int))))
{
int val, i;
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
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);
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeIntegerInternal(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret;
if (pbEncoded[0] == ASN_INTEGER)
{
DWORD bytesNeeded, dataLen;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
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;
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);
}
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
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 ((ret = CRYPT_AsnDecodeIntegerInternal(dwCertEncodingType,
lpszStructType, pbEncoded, cbEncoded,
dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, NULL, &bytesNeeded)))
{
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(dwCertEncodingType,
lpszStructType, pbEncoded, cbEncoded,
dwFlags & ~CRYPT_ENCODE_ALLOC_FLAG, NULL, pvStructInfo,
&bytesNeeded);
}
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
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
{
if (pbEncoded[0] == ASN_INTEGER)
{
DWORD bytesNeeded, dataLen;
CRYPT_INTEGER_BLOB *blob;
if ((ret = CRYPT_GetLen(pbEncoded, cbEncoded, &dataLen)))
{
bytesNeeded = dataLen + sizeof(CRYPT_INTEGER_BLOB);
if (!pvStructInfo)
*pcbStructInfo = bytesNeeded;
else if ((ret = CRYPT_DecodeEnsureSpace(dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo, bytesNeeded)))
{
BYTE lenBytes = GET_LEN_BYTES(pbEncoded[1]);
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
blob = (CRYPT_INTEGER_BLOB *)pvStructInfo;
blob->cbData = dataLen;
blob->pbData = (BYTE *)pvStructInfo +
sizeof(CRYPT_INTEGER_BLOB);
/* 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 +
pbEncoded[1] - i - 1);
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
}
__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;
__TRY
{
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;
}
}
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
#define MIN_ENCODED_TIME_LENGTH 10
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 = TRUE;
if (!pvStructInfo)
{
*pcbStructInfo = sizeof(FILETIME);
return TRUE;
}
__TRY
{
if (pbEncoded[0] == ASN_UTCTIME)
{
if (cbEncoded <= 1)
{
SetLastError(CRYPT_E_ASN1_EOD);
ret = FALSE;
}
else if (pbEncoded[1] > 0x7f)
{
/* long-form date strings really can't be valid */
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
{
SYSTEMTIME sysTime = { 0 };
BYTE len = pbEncoded[1];
if (len < MIN_ENCODED_TIME_LENGTH)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
{
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 && (ret = CRYPT_DecodeEnsureSpace(dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo,
sizeof(FILETIME))))
{
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
ret = SystemTimeToFileTime(&sysTime,
(FILETIME *)pvStructInfo);
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
return ret;
}
static BOOL WINAPI CRYPT_AsnDecodeGeneralizedTime(DWORD dwCertEncodingType,
LPCSTR lpszStructType, const BYTE *pbEncoded, DWORD cbEncoded, DWORD dwFlags,
PCRYPT_DECODE_PARA pDecodePara, void *pvStructInfo, DWORD *pcbStructInfo)
{
BOOL ret = TRUE;
if (!pvStructInfo)
{
*pcbStructInfo = sizeof(FILETIME);
return TRUE;
}
__TRY
{
if (pbEncoded[0] == ASN_GENERALTIME)
{
if (cbEncoded <= 1)
{
SetLastError(CRYPT_E_ASN1_EOD);
ret = FALSE;
}
else if (pbEncoded[1] > 0x7f)
{
/* long-form date strings really can't be valid */
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
{
BYTE len = pbEncoded[1];
if (len < MIN_ENCODED_TIME_LENGTH)
{
SetLastError(CRYPT_E_ASN1_CORRUPT);
ret = FALSE;
}
else
{
SYSTEMTIME sysTime = { 0 };
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 && (ret = CRYPT_DecodeEnsureSpace(dwFlags,
pDecodePara, pvStructInfo, pcbStructInfo,
sizeof(FILETIME))))
{
if (dwFlags & CRYPT_DECODE_ALLOC_FLAG)
pvStructInfo = *(BYTE **)pvStructInfo;
ret = SystemTimeToFileTime(&sysTime,
(FILETIME *)pvStructInfo);
}
}
}
}
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
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
{
if (pbEncoded[0] == ASN_UTCTIME)
ret = CRYPT_AsnDecodeUtcTime(dwCertEncodingType, lpszStructType,
pbEncoded, cbEncoded, dwFlags, pDecodePara, pvStructInfo,
pcbStructInfo);
else if (pbEncoded[0] == ASN_GENERALTIME)
ret = CRYPT_AsnDecodeGeneralizedTime(dwCertEncodingType,
lpszStructType, pbEncoded, cbEncoded, dwFlags, pDecodePara,
pvStructInfo, pcbStructInfo);
else
{
SetLastError(CRYPT_E_ASN1_BADTAG);
ret = FALSE;
}
}
__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 ((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);
return FALSE;
}
}
__EXCEPT(page_fault)
{
SetLastError(STATUS_ACCESS_VIOLATION);
ret = FALSE;
}
__ENDTRY
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;
HMODULE lib = NULL;
CryptDecodeObjectExFunc decodeFunc = NULL;
TRACE("(0x%08lx, %s, %p, %ld, 0x%08lx, %p, %p, %p)\n",
dwCertEncodingType, debugstr_a(lpszStructType), pbEncoded,
cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
if (!pvStructInfo && !pcbStructInfo)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
if ((dwCertEncodingType & CERT_ENCODING_TYPE_MASK) != X509_ASN_ENCODING
&& (dwCertEncodingType & CMSG_ENCODING_TYPE_MASK) != PKCS_7_ASN_ENCODING)
{
SetLastError(ERROR_FILE_NOT_FOUND);
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;
if (!HIWORD(lpszStructType))
{
switch (LOWORD(lpszStructType))
{
case (WORD)X509_CERT:
decodeFunc = CRYPT_AsnDecodeCert;
break;
case (WORD)X509_CERT_TO_BE_SIGNED:
decodeFunc = CRYPT_AsnDecodeCertInfo;
break;
case (WORD)X509_CERT_CRL_TO_BE_SIGNED:
decodeFunc = CRYPT_AsnDecodeCRLInfo;
break;
case (WORD)X509_EXTENSIONS:
decodeFunc = CRYPT_AsnDecodeExtensions;
break;
case (WORD)X509_NAME:
decodeFunc = CRYPT_AsnDecodeName;
break;
case (WORD)X509_PUBLIC_KEY_INFO:
decodeFunc = CRYPT_AsnDecodePubKeyInfo;
break;
case (WORD)X509_ALTERNATE_NAME:
decodeFunc = CRYPT_AsnDecodeAltName;
break;
case (WORD)X509_BASIC_CONSTRAINTS2:
decodeFunc = CRYPT_AsnDecodeBasicConstraints2;
break;
case (WORD)X509_OCTET_STRING:
decodeFunc = CRYPT_AsnDecodeOctets;
break;
case (WORD)X509_BITS:
case (WORD)X509_KEY_USAGE:
decodeFunc = CRYPT_AsnDecodeBits;
break;
case (WORD)X509_INTEGER:
decodeFunc = CRYPT_AsnDecodeInt;
break;
case (WORD)X509_MULTI_BYTE_INTEGER:
decodeFunc = CRYPT_AsnDecodeInteger;
break;
case (WORD)X509_MULTI_BYTE_UINT:
decodeFunc = CRYPT_AsnDecodeUnsignedInteger;
break;
case (WORD)X509_ENUMERATED:
decodeFunc = CRYPT_AsnDecodeEnumerated;
break;
case (WORD)X509_CHOICE_OF_TIME:
decodeFunc = CRYPT_AsnDecodeChoiceOfTime;
break;
case (WORD)X509_SEQUENCE_OF_ANY:
decodeFunc = CRYPT_AsnDecodeSequenceOfAny;
break;
case (WORD)PKCS_UTC_TIME:
decodeFunc = CRYPT_AsnDecodeUtcTime;
break;
default:
FIXME("%d: unimplemented\n", LOWORD(lpszStructType));
}
}
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_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_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
TRACE("OID %s not found or unimplemented, looking for DLL\n",
debugstr_a(lpszStructType));
if (!decodeFunc)
decodeFunc = (CryptDecodeObjectExFunc)CRYPT_GetFunc(dwCertEncodingType,
lpszStructType, "CryptDecodeObjectEx", &lib);
if (decodeFunc)
ret = decodeFunc(dwCertEncodingType, lpszStructType, pbEncoded,
cbEncoded, dwFlags, pDecodePara, pvStructInfo, pcbStructInfo);
else
SetLastError(ERROR_FILE_NOT_FOUND);
if (lib)
FreeLibrary(lib);
return ret;
}