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wine/dlls/crypt32/base64.c
Gerald Pfeifer ca41486b8a crypt32: Fix type of empty in encodeBase64W().
2010-03-26 10:32:23 +01:00

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/*
* base64 encoder/decoder
*
* Copyright 2005 by Kai Blin
* Copyright 2006 Juan Lang
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "wincrypt.h"
#include "wine/debug.h"
#include "wine/unicode.h"
WINE_DEFAULT_DEBUG_CHANNEL(crypt);
#define CERT_HEADER "-----BEGIN CERTIFICATE-----"
#define CERT_TRAILER "-----END CERTIFICATE-----"
#define CERT_REQUEST_HEADER "-----BEGIN NEW CERTIFICATE REQUEST-----"
#define CERT_REQUEST_TRAILER "-----END NEW CERTIFICATE REQUEST-----"
#define X509_HEADER "-----BEGIN X509 CRL-----"
#define X509_TRAILER "-----END X509 CRL-----"
static const WCHAR CERT_HEADER_W[] = {
'-','-','-','-','-','B','E','G','I','N',' ','C','E','R','T','I','F','I','C',
'A','T','E','-','-','-','-','-',0 };
static const WCHAR CERT_TRAILER_W[] = {
'-','-','-','-','-','E','N','D',' ','C','E','R','T','I','F','I','C','A','T',
'E','-','-','-','-','-',0 };
static const WCHAR CERT_REQUEST_HEADER_W[] = {
'-','-','-','-','-','B','E','G','I','N',' ','N','E','W',' ','C','E','R','T',
'I','F','I','C','A','T','E','R','E','Q','U','E','S','T','-','-','-','-','-',0 };
static const WCHAR CERT_REQUEST_TRAILER_W[] = {
'-','-','-','-','-','E','N','D',' ','N','E','W',' ','C','E','R','T','I','F',
'I','C','A','T','E','R','E','Q','U','E','S','T','-','-','-','-','-',0 };
static const WCHAR X509_HEADER_W[] = {
'-','-','-','-','-','B','E','G','I','N',' ','X','5','0','9',' ','C','R','L',
'-','-','-','-','-',0 };
static const WCHAR X509_TRAILER_W[] = {
'-','-','-','-','-','E','N','D',' ','X','5','0','9',' ','C','R','L','-','-',
'-','-','-',0 };
static const char b64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
typedef BOOL (*BinaryToStringAFunc)(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPSTR pszString, DWORD *pcchString);
typedef BOOL (*BinaryToStringWFunc)(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPWSTR pszString, DWORD *pcchString);
static BOOL EncodeBinaryToBinaryA(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPSTR pszString, DWORD *pcchString)
{
BOOL ret = TRUE;
if (*pcchString < cbBinary)
{
if (!pszString)
*pcchString = cbBinary;
else
{
SetLastError(ERROR_INSUFFICIENT_BUFFER);
*pcchString = cbBinary;
ret = FALSE;
}
}
else
{
if (cbBinary)
memcpy(pszString, pbBinary, cbBinary);
*pcchString = cbBinary;
}
return ret;
}
static LONG encodeBase64A(const BYTE *in_buf, int in_len, LPCSTR sep,
char* out_buf, DWORD *out_len)
{
int div, i;
const BYTE *d = in_buf;
int bytes = (in_len*8 + 5)/6, pad_bytes = (bytes % 4) ? 4 - (bytes % 4) : 0;
DWORD needed;
LPSTR ptr;
TRACE("bytes is %d, pad bytes is %d\n", bytes, pad_bytes);
needed = bytes + pad_bytes + 1;
needed += (needed / 64 + 1) * strlen(sep);
if (needed > *out_len)
{
*out_len = needed;
return ERROR_INSUFFICIENT_BUFFER;
}
else
*out_len = needed;
/* Three bytes of input give 4 chars of output */
div = in_len / 3;
ptr = out_buf;
i = 0;
while (div > 0)
{
if (i && i % 64 == 0)
{
strcpy(ptr, sep);
ptr += strlen(sep);
}
/* first char is the first 6 bits of the first byte*/
*ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
/* second char is the last 2 bits of the first byte and the first 4
* bits of the second byte */
*ptr++ = b64[ ((d[0] << 4) & 0x30) | (d[1] >> 4 & 0x0f)];
/* third char is the last 4 bits of the second byte and the first 2
* bits of the third byte */
*ptr++ = b64[ ((d[1] << 2) & 0x3c) | (d[2] >> 6 & 0x03)];
/* fourth char is the remaining 6 bits of the third byte */
*ptr++ = b64[ d[2] & 0x3f];
i += 4;
d += 3;
div--;
}
switch(pad_bytes)
{
case 1:
/* first char is the first 6 bits of the first byte*/
*ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
/* second char is the last 2 bits of the first byte and the first 4
* bits of the second byte */
*ptr++ = b64[ ((d[0] << 4) & 0x30) | (d[1] >> 4 & 0x0f)];
/* third char is the last 4 bits of the second byte padded with
* two zeroes */
*ptr++ = b64[ ((d[1] << 2) & 0x3c) ];
/* fourth char is a = to indicate one byte of padding */
*ptr++ = '=';
break;
case 2:
/* first char is the first 6 bits of the first byte*/
*ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
/* second char is the last 2 bits of the first byte padded with
* four zeroes*/
*ptr++ = b64[ ((d[0] << 4) & 0x30)];
/* third char is = to indicate padding */
*ptr++ = '=';
/* fourth char is = to indicate padding */
*ptr++ = '=';
break;
}
strcpy(ptr, sep);
return ERROR_SUCCESS;
}
static BOOL BinaryToBase64A(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPSTR pszString, DWORD *pcchString)
{
static const char crlf[] = "\r\n", lf[] = "\n";
BOOL ret = TRUE;
LPCSTR header = NULL, trailer = NULL, sep;
DWORD charsNeeded;
if (dwFlags & CRYPT_STRING_NOCR)
sep = lf;
else if (dwFlags & CRYPT_STRING_NOCRLF)
sep = "";
else
sep = crlf;
switch (dwFlags & 0x0fffffff)
{
case CRYPT_STRING_BASE64:
/* no header or footer */
break;
case CRYPT_STRING_BASE64HEADER:
header = CERT_HEADER;
trailer = CERT_TRAILER;
break;
case CRYPT_STRING_BASE64REQUESTHEADER:
header = CERT_REQUEST_HEADER;
trailer = CERT_REQUEST_TRAILER;
break;
case CRYPT_STRING_BASE64X509CRLHEADER:
header = X509_HEADER;
trailer = X509_TRAILER;
break;
}
charsNeeded = 0;
encodeBase64A(pbBinary, cbBinary, sep, NULL, &charsNeeded);
if (header)
charsNeeded += strlen(header) + strlen(sep);
if (trailer)
charsNeeded += strlen(trailer) + strlen(sep);
if (charsNeeded <= *pcchString)
{
LPSTR ptr = pszString;
DWORD size = charsNeeded;
if (header)
{
strcpy(ptr, header);
ptr += strlen(ptr);
strcpy(ptr, sep);
ptr += strlen(sep);
}
encodeBase64A(pbBinary, cbBinary, sep, ptr, &size);
ptr += size - 1;
if (trailer)
{
strcpy(ptr, trailer);
ptr += strlen(ptr);
strcpy(ptr, sep);
ptr += strlen(sep);
}
*pcchString = charsNeeded - 1;
}
else if (pszString)
{
*pcchString = charsNeeded;
SetLastError(ERROR_INSUFFICIENT_BUFFER);
ret = FALSE;
}
else
*pcchString = charsNeeded;
return ret;
}
BOOL WINAPI CryptBinaryToStringA(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPSTR pszString, DWORD *pcchString)
{
BinaryToStringAFunc encoder = NULL;
TRACE("(%p, %d, %08x, %p, %p)\n", pbBinary, cbBinary, dwFlags, pszString,
pcchString);
if (!pbBinary)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
if (!pcchString)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
switch (dwFlags & 0x0fffffff)
{
case CRYPT_STRING_BINARY:
encoder = EncodeBinaryToBinaryA;
break;
case CRYPT_STRING_BASE64:
case CRYPT_STRING_BASE64HEADER:
case CRYPT_STRING_BASE64REQUESTHEADER:
case CRYPT_STRING_BASE64X509CRLHEADER:
encoder = BinaryToBase64A;
break;
case CRYPT_STRING_HEX:
case CRYPT_STRING_HEXASCII:
case CRYPT_STRING_HEXADDR:
case CRYPT_STRING_HEXASCIIADDR:
FIXME("Unimplemented type %d\n", dwFlags & 0x0fffffff);
/* fall through */
default:
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
return encoder(pbBinary, cbBinary, dwFlags, pszString, pcchString);
}
static LONG encodeBase64W(const BYTE *in_buf, int in_len, LPCWSTR sep,
WCHAR* out_buf, DWORD *out_len)
{
int div, i;
const BYTE *d = in_buf;
int bytes = (in_len*8 + 5)/6, pad_bytes = (bytes % 4) ? 4 - (bytes % 4) : 0;
DWORD needed;
LPWSTR ptr;
TRACE("bytes is %d, pad bytes is %d\n", bytes, pad_bytes);
needed = bytes + pad_bytes + 1;
needed += (needed / 64 + 1) * strlenW(sep);
if (needed > *out_len)
{
*out_len = needed;
return ERROR_INSUFFICIENT_BUFFER;
}
else
*out_len = needed;
/* Three bytes of input give 4 chars of output */
div = in_len / 3;
ptr = out_buf;
i = 0;
while (div > 0)
{
if (i && i % 64 == 0)
{
strcpyW(ptr, sep);
ptr += strlenW(sep);
}
/* first char is the first 6 bits of the first byte*/
*ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
/* second char is the last 2 bits of the first byte and the first 4
* bits of the second byte */
*ptr++ = b64[ ((d[0] << 4) & 0x30) | (d[1] >> 4 & 0x0f)];
/* third char is the last 4 bits of the second byte and the first 2
* bits of the third byte */
*ptr++ = b64[ ((d[1] << 2) & 0x3c) | (d[2] >> 6 & 0x03)];
/* fourth char is the remaining 6 bits of the third byte */
*ptr++ = b64[ d[2] & 0x3f];
i += 4;
d += 3;
div--;
}
switch(pad_bytes)
{
case 1:
/* first char is the first 6 bits of the first byte*/
*ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
/* second char is the last 2 bits of the first byte and the first 4
* bits of the second byte */
*ptr++ = b64[ ((d[0] << 4) & 0x30) | (d[1] >> 4 & 0x0f)];
/* third char is the last 4 bits of the second byte padded with
* two zeroes */
*ptr++ = b64[ ((d[1] << 2) & 0x3c) ];
/* fourth char is a = to indicate one byte of padding */
*ptr++ = '=';
break;
case 2:
/* first char is the first 6 bits of the first byte*/
*ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
/* second char is the last 2 bits of the first byte padded with
* four zeroes*/
*ptr++ = b64[ ((d[0] << 4) & 0x30)];
/* third char is = to indicate padding */
*ptr++ = '=';
/* fourth char is = to indicate padding */
*ptr++ = '=';
break;
}
strcpyW(ptr, sep);
return ERROR_SUCCESS;
}
static BOOL BinaryToBase64W(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPWSTR pszString, DWORD *pcchString)
{
static const WCHAR crlf[] = { '\r','\n',0 }, lf[] = { '\n',0 }, empty[] = {0};
BOOL ret = TRUE;
LPCWSTR header = NULL, trailer = NULL, sep;
DWORD charsNeeded;
if (dwFlags & CRYPT_STRING_NOCR)
sep = lf;
else if (dwFlags & CRYPT_STRING_NOCRLF)
sep = empty;
else
sep = crlf;
switch (dwFlags & 0x0fffffff)
{
case CRYPT_STRING_BASE64:
/* no header or footer */
break;
case CRYPT_STRING_BASE64HEADER:
header = CERT_HEADER_W;
trailer = CERT_TRAILER_W;
break;
case CRYPT_STRING_BASE64REQUESTHEADER:
header = CERT_REQUEST_HEADER_W;
trailer = CERT_REQUEST_TRAILER_W;
break;
case CRYPT_STRING_BASE64X509CRLHEADER:
header = X509_HEADER_W;
trailer = X509_TRAILER_W;
break;
}
charsNeeded = 0;
encodeBase64W(pbBinary, cbBinary, sep, NULL, &charsNeeded);
if (header)
charsNeeded += strlenW(header) + strlenW(sep);
if (trailer)
charsNeeded += strlenW(trailer) + strlenW(sep);
if (charsNeeded <= *pcchString)
{
LPWSTR ptr = pszString;
DWORD size = charsNeeded;
if (header)
{
strcpyW(ptr, header);
ptr += strlenW(ptr);
strcpyW(ptr, sep);
ptr += strlenW(sep);
}
encodeBase64W(pbBinary, cbBinary, sep, ptr, &size);
ptr += size - 1;
if (trailer)
{
strcpyW(ptr, trailer);
ptr += strlenW(ptr);
strcpyW(ptr, sep);
ptr += strlenW(sep);
}
*pcchString = charsNeeded - 1;
}
else if (pszString)
{
*pcchString = charsNeeded;
SetLastError(ERROR_INSUFFICIENT_BUFFER);
ret = FALSE;
}
else
*pcchString = charsNeeded;
return ret;
}
BOOL WINAPI CryptBinaryToStringW(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPWSTR pszString, DWORD *pcchString)
{
BinaryToStringWFunc encoder = NULL;
TRACE("(%p, %d, %08x, %p, %p)\n", pbBinary, cbBinary, dwFlags, pszString,
pcchString);
if (!pbBinary)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
if (!pcchString)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
switch (dwFlags & 0x0fffffff)
{
case CRYPT_STRING_BASE64:
case CRYPT_STRING_BASE64HEADER:
case CRYPT_STRING_BASE64REQUESTHEADER:
case CRYPT_STRING_BASE64X509CRLHEADER:
encoder = BinaryToBase64W;
break;
case CRYPT_STRING_BINARY:
case CRYPT_STRING_HEX:
case CRYPT_STRING_HEXASCII:
case CRYPT_STRING_HEXADDR:
case CRYPT_STRING_HEXASCIIADDR:
FIXME("Unimplemented type %d\n", dwFlags & 0x0fffffff);
/* fall through */
default:
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
return encoder(pbBinary, cbBinary, dwFlags, pszString, pcchString);
}
static inline BYTE decodeBase64Byte(int c)
{
BYTE ret;
if (c >= 'A' && c <= 'Z')
ret = c - 'A';
else if (c >= 'a' && c <= 'z')
ret = c - 'a' + 26;
else if (c >= '0' && c <= '9')
ret = c - '0' + 52;
else if (c == '+')
ret = 62;
else if (c == '/')
ret = 63;
else
ret = 64;
return ret;
}
static LONG decodeBase64Block(const char *in_buf, int in_len,
const char **nextBlock, PBYTE out_buf, DWORD *out_len)
{
int len = in_len, i;
const char *d = in_buf;
int ip0, ip1, ip2, ip3;
if (len < 4)
return ERROR_INVALID_DATA;
i = 0;
if (d[2] == '=')
{
if ((ip0 = decodeBase64Byte(d[0])) > 63)
return ERROR_INVALID_DATA;
if ((ip1 = decodeBase64Byte(d[1])) > 63)
return ERROR_INVALID_DATA;
if (out_buf)
out_buf[i] = (ip0 << 2) | (ip1 >> 4);
i++;
}
else if (d[3] == '=')
{
if ((ip0 = decodeBase64Byte(d[0])) > 63)
return ERROR_INVALID_DATA;
if ((ip1 = decodeBase64Byte(d[1])) > 63)
return ERROR_INVALID_DATA;
if ((ip2 = decodeBase64Byte(d[2])) > 63)
return ERROR_INVALID_DATA;
if (out_buf)
{
out_buf[i + 0] = (ip0 << 2) | (ip1 >> 4);
out_buf[i + 1] = (ip1 << 4) | (ip2 >> 2);
}
i += 2;
}
else
{
if ((ip0 = decodeBase64Byte(d[0])) > 63)
return ERROR_INVALID_DATA;
if ((ip1 = decodeBase64Byte(d[1])) > 63)
return ERROR_INVALID_DATA;
if ((ip2 = decodeBase64Byte(d[2])) > 63)
return ERROR_INVALID_DATA;
if ((ip3 = decodeBase64Byte(d[3])) > 63)
return ERROR_INVALID_DATA;
if (out_buf)
{
out_buf[i + 0] = (ip0 << 2) | (ip1 >> 4);
out_buf[i + 1] = (ip1 << 4) | (ip2 >> 2);
out_buf[i + 2] = (ip2 << 6) | ip3;
}
i += 3;
}
if (len >= 6 && d[4] == '\r' && d[5] == '\n')
*nextBlock = d + 6;
else if (len >= 5 && d[4] == '\n')
*nextBlock = d + 5;
else if (len >= 4 && d[4])
*nextBlock = d + 4;
else
*nextBlock = NULL;
*out_len = i;
return ERROR_SUCCESS;
}
/* Unlike CryptStringToBinaryA, cchString is guaranteed to be the length of the
* string to convert.
*/
typedef LONG (*StringToBinaryAFunc)(LPCSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags);
static LONG Base64ToBinaryA(LPCSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = ERROR_SUCCESS;
const char *nextBlock;
DWORD outLen = 0;
nextBlock = pszString;
while (nextBlock && !ret)
{
DWORD len = 0;
ret = decodeBase64Block(nextBlock, cchString - (nextBlock - pszString),
&nextBlock, pbBinary ? pbBinary + outLen : NULL, &len);
if (!ret)
outLen += len;
if (cchString - (nextBlock - pszString) <= 0)
nextBlock = NULL;
}
*pcbBinary = outLen;
if (!ret)
{
if (pdwSkip)
*pdwSkip = 0;
if (pdwFlags)
*pdwFlags = CRYPT_STRING_BASE64;
}
else if (ret == ERROR_INSUFFICIENT_BUFFER)
{
if (!pbBinary)
ret = ERROR_SUCCESS;
}
return ret;
}
static LONG Base64WithHeaderAndTrailerToBinaryA(LPCSTR pszString,
DWORD cchString, LPCSTR header, LPCSTR trailer, BYTE *pbBinary,
DWORD *pcbBinary, DWORD *pdwSkip)
{
LONG ret;
LPCSTR ptr;
if (cchString > strlen(header) + strlen(trailer)
&& (ptr = strstr(pszString, header)) != NULL)
{
LPCSTR trailerSpot = pszString + cchString - strlen(trailer);
if (pszString[cchString - 1] == '\n')
{
cchString--;
trailerSpot--;
}
if (pszString[cchString - 1] == '\r')
{
cchString--;
trailerSpot--;
}
if (!strncmp(trailerSpot, trailer, strlen(trailer)))
{
if (pdwSkip)
*pdwSkip = ptr - pszString;
ptr += strlen(header);
if (*ptr == '\r') ptr++;
if (*ptr == '\n') ptr++;
cchString -= ptr - pszString + strlen(trailer);
ret = Base64ToBinaryA(ptr, cchString, pbBinary, pcbBinary, NULL,
NULL);
}
else
ret = ERROR_INVALID_DATA;
}
else
ret = ERROR_INVALID_DATA;
return ret;
}
static LONG Base64HeaderToBinaryA(LPCSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = Base64WithHeaderAndTrailerToBinaryA(pszString, cchString,
CERT_HEADER, CERT_TRAILER, pbBinary, pcbBinary, pdwSkip);
if (!ret && pdwFlags)
*pdwFlags = CRYPT_STRING_BASE64HEADER;
return ret;
}
static LONG Base64RequestHeaderToBinaryA(LPCSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = Base64WithHeaderAndTrailerToBinaryA(pszString, cchString,
CERT_REQUEST_HEADER, CERT_REQUEST_TRAILER, pbBinary, pcbBinary, pdwSkip);
if (!ret && pdwFlags)
*pdwFlags = CRYPT_STRING_BASE64REQUESTHEADER;
return ret;
}
static LONG Base64X509HeaderToBinaryA(LPCSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = Base64WithHeaderAndTrailerToBinaryA(pszString, cchString,
X509_HEADER, X509_TRAILER, pbBinary, pcbBinary, pdwSkip);
if (!ret && pdwFlags)
*pdwFlags = CRYPT_STRING_BASE64X509CRLHEADER;
return ret;
}
static LONG Base64AnyToBinaryA(LPCSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret;
ret = Base64HeaderToBinaryA(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
if (ret == ERROR_INVALID_DATA)
ret = Base64ToBinaryA(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
return ret;
}
static LONG DecodeBinaryToBinaryA(LPCSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = ERROR_SUCCESS;
if (*pcbBinary < cchString)
{
if (!pbBinary)
*pcbBinary = cchString;
else
{
ret = ERROR_INSUFFICIENT_BUFFER;
*pcbBinary = cchString;
}
}
else
{
if (cchString)
memcpy(pbBinary, pszString, cchString);
*pcbBinary = cchString;
}
return ret;
}
static LONG DecodeAnyA(LPCSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret;
ret = Base64HeaderToBinaryA(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
if (ret == ERROR_INVALID_DATA)
ret = Base64ToBinaryA(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
if (ret == ERROR_INVALID_DATA)
ret = DecodeBinaryToBinaryA(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
return ret;
}
BOOL WINAPI CryptStringToBinaryA(LPCSTR pszString,
DWORD cchString, DWORD dwFlags, BYTE *pbBinary, DWORD *pcbBinary,
DWORD *pdwSkip, DWORD *pdwFlags)
{
StringToBinaryAFunc decoder;
LONG ret;
TRACE("(%s, %d, %08x, %p, %p, %p, %p)\n", debugstr_a(pszString),
cchString, dwFlags, pbBinary, pcbBinary, pdwSkip, pdwFlags);
if (!pszString)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
/* Only the bottom byte contains valid types */
if (dwFlags & 0xfffffff0)
{
SetLastError(ERROR_INVALID_DATA);
return FALSE;
}
switch (dwFlags)
{
case CRYPT_STRING_BASE64_ANY:
decoder = Base64AnyToBinaryA;
break;
case CRYPT_STRING_BASE64:
decoder = Base64ToBinaryA;
break;
case CRYPT_STRING_BASE64HEADER:
decoder = Base64HeaderToBinaryA;
break;
case CRYPT_STRING_BASE64REQUESTHEADER:
decoder = Base64RequestHeaderToBinaryA;
break;
case CRYPT_STRING_BASE64X509CRLHEADER:
decoder = Base64X509HeaderToBinaryA;
break;
case CRYPT_STRING_BINARY:
decoder = DecodeBinaryToBinaryA;
break;
case CRYPT_STRING_ANY:
decoder = DecodeAnyA;
break;
case CRYPT_STRING_HEX:
case CRYPT_STRING_HEXASCII:
case CRYPT_STRING_HEXADDR:
case CRYPT_STRING_HEXASCIIADDR:
FIXME("Unimplemented type %d\n", dwFlags & 0x7fffffff);
/* fall through */
default:
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
if (!cchString)
cchString = strlen(pszString);
ret = decoder(pszString, cchString, pbBinary, pcbBinary, pdwSkip, pdwFlags);
if (ret)
SetLastError(ret);
return (ret == ERROR_SUCCESS) ? TRUE : FALSE;
}
static LONG decodeBase64BlockW(const WCHAR *in_buf, int in_len,
const WCHAR **nextBlock, PBYTE out_buf, DWORD *out_len)
{
int len = in_len, i;
const WCHAR *d = in_buf;
int ip0, ip1, ip2, ip3;
if (len < 4)
return ERROR_INVALID_DATA;
i = 0;
if (d[2] == '=')
{
if ((ip0 = decodeBase64Byte(d[0])) > 63)
return ERROR_INVALID_DATA;
if ((ip1 = decodeBase64Byte(d[1])) > 63)
return ERROR_INVALID_DATA;
if (out_buf)
out_buf[i] = (ip0 << 2) | (ip1 >> 4);
i++;
}
else if (d[3] == '=')
{
if ((ip0 = decodeBase64Byte(d[0])) > 63)
return ERROR_INVALID_DATA;
if ((ip1 = decodeBase64Byte(d[1])) > 63)
return ERROR_INVALID_DATA;
if ((ip2 = decodeBase64Byte(d[2])) > 63)
return ERROR_INVALID_DATA;
if (out_buf)
{
out_buf[i + 0] = (ip0 << 2) | (ip1 >> 4);
out_buf[i + 1] = (ip1 << 4) | (ip2 >> 2);
}
i += 2;
}
else
{
if ((ip0 = decodeBase64Byte(d[0])) > 63)
return ERROR_INVALID_DATA;
if ((ip1 = decodeBase64Byte(d[1])) > 63)
return ERROR_INVALID_DATA;
if ((ip2 = decodeBase64Byte(d[2])) > 63)
return ERROR_INVALID_DATA;
if ((ip3 = decodeBase64Byte(d[3])) > 63)
return ERROR_INVALID_DATA;
if (out_buf)
{
out_buf[i + 0] = (ip0 << 2) | (ip1 >> 4);
out_buf[i + 1] = (ip1 << 4) | (ip2 >> 2);
out_buf[i + 2] = (ip2 << 6) | ip3;
}
i += 3;
}
if (len >= 6 && d[4] == '\r' && d[5] == '\n')
*nextBlock = d + 6;
else if (len >= 5 && d[4] == '\n')
*nextBlock = d + 5;
else if (len >= 4 && d[4])
*nextBlock = d + 4;
else
*nextBlock = NULL;
*out_len = i;
return ERROR_SUCCESS;
}
/* Unlike CryptStringToBinaryW, cchString is guaranteed to be the length of the
* string to convert.
*/
typedef LONG (*StringToBinaryWFunc)(LPCWSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags);
static LONG Base64ToBinaryW(LPCWSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = ERROR_SUCCESS;
const WCHAR *nextBlock;
DWORD outLen = 0;
nextBlock = pszString;
while (nextBlock && !ret)
{
DWORD len = 0;
ret = decodeBase64BlockW(nextBlock, cchString - (nextBlock - pszString),
&nextBlock, pbBinary ? pbBinary + outLen : NULL, &len);
if (!ret)
outLen += len;
if (cchString - (nextBlock - pszString) <= 0)
nextBlock = NULL;
}
*pcbBinary = outLen;
if (!ret)
{
if (pdwSkip)
*pdwSkip = 0;
if (pdwFlags)
*pdwFlags = CRYPT_STRING_BASE64;
}
else if (ret == ERROR_INSUFFICIENT_BUFFER)
{
if (!pbBinary)
ret = ERROR_SUCCESS;
}
return ret;
}
static LONG Base64WithHeaderAndTrailerToBinaryW(LPCWSTR pszString,
DWORD cchString, LPCWSTR header, LPCWSTR trailer, BYTE *pbBinary,
DWORD *pcbBinary, DWORD *pdwSkip)
{
LONG ret;
LPCWSTR ptr;
if (cchString > strlenW(header) + strlenW(trailer)
&& (ptr = strstrW(pszString, header)) != NULL)
{
LPCWSTR trailerSpot = pszString + cchString - strlenW(trailer);
if (pszString[cchString - 1] == '\n')
{
cchString--;
trailerSpot--;
}
if (pszString[cchString - 1] == '\r')
{
cchString--;
trailerSpot--;
}
if (!strncmpW(trailerSpot, trailer, strlenW(trailer)))
{
if (pdwSkip)
*pdwSkip = ptr - pszString;
ptr += strlenW(header);
if (*ptr == '\r') ptr++;
if (*ptr == '\n') ptr++;
cchString -= ptr - pszString + strlenW(trailer);
ret = Base64ToBinaryW(ptr, cchString, pbBinary, pcbBinary, NULL,
NULL);
}
else
ret = ERROR_INVALID_DATA;
}
else
ret = ERROR_INVALID_DATA;
return ret;
}
static LONG Base64HeaderToBinaryW(LPCWSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = Base64WithHeaderAndTrailerToBinaryW(pszString, cchString,
CERT_HEADER_W, CERT_TRAILER_W, pbBinary, pcbBinary, pdwSkip);
if (!ret && pdwFlags)
*pdwFlags = CRYPT_STRING_BASE64HEADER;
return ret;
}
static LONG Base64RequestHeaderToBinaryW(LPCWSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = Base64WithHeaderAndTrailerToBinaryW(pszString, cchString,
CERT_REQUEST_HEADER_W, CERT_REQUEST_TRAILER_W, pbBinary, pcbBinary,
pdwSkip);
if (!ret && pdwFlags)
*pdwFlags = CRYPT_STRING_BASE64REQUESTHEADER;
return ret;
}
static LONG Base64X509HeaderToBinaryW(LPCWSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = Base64WithHeaderAndTrailerToBinaryW(pszString, cchString,
X509_HEADER_W, X509_TRAILER_W, pbBinary, pcbBinary, pdwSkip);
if (!ret && pdwFlags)
*pdwFlags = CRYPT_STRING_BASE64X509CRLHEADER;
return ret;
}
static LONG Base64AnyToBinaryW(LPCWSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret;
ret = Base64HeaderToBinaryW(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
if (ret == ERROR_INVALID_DATA)
ret = Base64ToBinaryW(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
return ret;
}
static LONG DecodeBinaryToBinaryW(LPCWSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret = ERROR_SUCCESS;
if (*pcbBinary < cchString)
{
if (!pbBinary)
*pcbBinary = cchString;
else
{
ret = ERROR_INSUFFICIENT_BUFFER;
*pcbBinary = cchString;
}
}
else
{
if (cchString)
memcpy(pbBinary, pszString, cchString * sizeof(WCHAR));
*pcbBinary = cchString * sizeof(WCHAR);
}
return ret;
}
static LONG DecodeAnyW(LPCWSTR pszString, DWORD cchString,
BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
{
LONG ret;
ret = Base64HeaderToBinaryW(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
if (ret == ERROR_INVALID_DATA)
ret = Base64ToBinaryW(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
if (ret == ERROR_INVALID_DATA)
ret = DecodeBinaryToBinaryW(pszString, cchString, pbBinary, pcbBinary,
pdwSkip, pdwFlags);
return ret;
}
BOOL WINAPI CryptStringToBinaryW(LPCWSTR pszString,
DWORD cchString, DWORD dwFlags, BYTE *pbBinary, DWORD *pcbBinary,
DWORD *pdwSkip, DWORD *pdwFlags)
{
StringToBinaryWFunc decoder;
LONG ret;
TRACE("(%s, %d, %08x, %p, %p, %p, %p)\n", debugstr_w(pszString),
cchString, dwFlags, pbBinary, pcbBinary, pdwSkip, pdwFlags);
if (!pszString)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
/* Only the bottom byte contains valid types */
if (dwFlags & 0xfffffff0)
{
SetLastError(ERROR_INVALID_DATA);
return FALSE;
}
switch (dwFlags)
{
case CRYPT_STRING_BASE64_ANY:
decoder = Base64AnyToBinaryW;
break;
case CRYPT_STRING_BASE64:
decoder = Base64ToBinaryW;
break;
case CRYPT_STRING_BASE64HEADER:
decoder = Base64HeaderToBinaryW;
break;
case CRYPT_STRING_BASE64REQUESTHEADER:
decoder = Base64RequestHeaderToBinaryW;
break;
case CRYPT_STRING_BASE64X509CRLHEADER:
decoder = Base64X509HeaderToBinaryW;
break;
case CRYPT_STRING_BINARY:
decoder = DecodeBinaryToBinaryW;
break;
case CRYPT_STRING_ANY:
decoder = DecodeAnyW;
break;
case CRYPT_STRING_HEX:
case CRYPT_STRING_HEXASCII:
case CRYPT_STRING_HEXADDR:
case CRYPT_STRING_HEXASCIIADDR:
FIXME("Unimplemented type %d\n", dwFlags & 0x7fffffff);
/* fall through */
default:
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
if (!cchString)
cchString = strlenW(pszString);
ret = decoder(pszString, cchString, pbBinary, pcbBinary, pdwSkip, pdwFlags);
if (ret)
SetLastError(ret);
return (ret == ERROR_SUCCESS) ? TRUE : FALSE;
}
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