2 * base64 encoder/decoder
4 * Copyright 2005 by Kai Blin
5 * Copyright 2006 Juan Lang
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
27 #include "wine/debug.h"
28 #include "wine/unicode.h"
30 WINE_DEFAULT_DEBUG_CHANNEL(crypt);
32 #define CERT_HEADER "-----BEGIN CERTIFICATE-----"
33 #define CERT_TRAILER "-----END CERTIFICATE-----"
34 #define CERT_REQUEST_HEADER "-----BEGIN NEW CERTIFICATE REQUEST-----"
35 #define CERT_REQUEST_TRAILER "-----END NEW CERTIFICATE REQUEST-----"
36 #define X509_HEADER "-----BEGIN X509 CRL-----"
37 #define X509_TRAILER "-----END X509 CRL-----"
39 static const WCHAR CERT_HEADER_W[] = {
40 '-','-','-','-','-','B','E','G','I','N',' ','C','E','R','T','I','F','I','C',
41 'A','T','E','-','-','-','-','-',0 };
42 static const WCHAR CERT_TRAILER_W[] = {
43 '-','-','-','-','-','E','N','D',' ','C','E','R','T','I','F','I','C','A','T',
44 'E','-','-','-','-','-',0 };
45 static const WCHAR CERT_REQUEST_HEADER_W[] = {
46 '-','-','-','-','-','B','E','G','I','N',' ','N','E','W',' ','C','E','R','T',
47 'I','F','I','C','A','T','E','R','E','Q','U','E','S','T','-','-','-','-','-',0 };
48 static const WCHAR CERT_REQUEST_TRAILER_W[] = {
49 '-','-','-','-','-','E','N','D',' ','N','E','W',' ','C','E','R','T','I','F',
50 'I','C','A','T','E','R','E','Q','U','E','S','T','-','-','-','-','-',0 };
51 static const WCHAR X509_HEADER_W[] = {
52 '-','-','-','-','-','B','E','G','I','N',' ','X','5','0','9',' ','C','R','L',
53 '-','-','-','-','-',0 };
54 static const WCHAR X509_TRAILER_W[] = {
55 '-','-','-','-','-','E','N','D',' ','X','5','0','9',' ','C','R','L','-','-',
58 static const char b64[] =
59 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
61 typedef BOOL (*BinaryToStringAFunc)(const BYTE *pbBinary,
62 DWORD cbBinary, DWORD dwFlags, LPSTR pszString, DWORD *pcchString);
63 typedef BOOL (*BinaryToStringWFunc)(const BYTE *pbBinary,
64 DWORD cbBinary, DWORD dwFlags, LPWSTR pszString, DWORD *pcchString);
66 static BOOL EncodeBinaryToBinaryA(const BYTE *pbBinary,
67 DWORD cbBinary, DWORD dwFlags, LPSTR pszString, DWORD *pcchString)
71 if (*pcchString < cbBinary)
74 *pcchString = cbBinary;
77 SetLastError(ERROR_INSUFFICIENT_BUFFER);
78 *pcchString = cbBinary;
85 memcpy(pszString, pbBinary, cbBinary);
86 *pcchString = cbBinary;
91 static LONG encodeBase64A(const BYTE *in_buf, int in_len, LPCSTR sep,
92 char* out_buf, DWORD *out_len)
95 const BYTE *d = in_buf;
96 int bytes = (in_len*8 + 5)/6, pad_bytes = (bytes % 4) ? 4 - (bytes % 4) : 0;
100 TRACE("bytes is %d, pad bytes is %d\n", bytes, pad_bytes);
101 needed = bytes + pad_bytes + 1;
103 needed += (needed / 64 + 1) * strlen(sep);
105 if (needed > *out_len)
108 return ERROR_INSUFFICIENT_BUFFER;
113 /* Three bytes of input give 4 chars of output */
120 if (sep && i && i % 64 == 0)
125 /* first char is the first 6 bits of the first byte*/
126 *ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
127 /* second char is the last 2 bits of the first byte and the first 4
128 * bits of the second byte */
129 *ptr++ = b64[ ((d[0] << 4) & 0x30) | (d[1] >> 4 & 0x0f)];
130 /* third char is the last 4 bits of the second byte and the first 2
131 * bits of the third byte */
132 *ptr++ = b64[ ((d[1] << 2) & 0x3c) | (d[2] >> 6 & 0x03)];
133 /* fourth char is the remaining 6 bits of the third byte */
134 *ptr++ = b64[ d[2] & 0x3f];
143 /* first char is the first 6 bits of the first byte*/
144 *ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
145 /* second char is the last 2 bits of the first byte and the first 4
146 * bits of the second byte */
147 *ptr++ = b64[ ((d[0] << 4) & 0x30) | (d[1] >> 4 & 0x0f)];
148 /* third char is the last 4 bits of the second byte padded with
150 *ptr++ = b64[ ((d[1] << 2) & 0x3c) ];
151 /* fourth char is a = to indicate one byte of padding */
155 /* first char is the first 6 bits of the first byte*/
156 *ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
157 /* second char is the last 2 bits of the first byte padded with
159 *ptr++ = b64[ ((d[0] << 4) & 0x30)];
160 /* third char is = to indicate padding */
162 /* fourth char is = to indicate padding */
169 return ERROR_SUCCESS;
172 static BOOL BinaryToBase64A(const BYTE *pbBinary,
173 DWORD cbBinary, DWORD dwFlags, LPSTR pszString, DWORD *pcchString)
175 static const char crlf[] = "\r\n", lf[] = "\n";
177 LPCSTR header = NULL, trailer = NULL, sep;
180 if (dwFlags & CRYPT_STRING_NOCR)
182 else if (dwFlags & CRYPT_STRING_NOCRLF)
186 switch (dwFlags & 0x0fffffff)
188 case CRYPT_STRING_BASE64:
189 /* no header or footer */
191 case CRYPT_STRING_BASE64HEADER:
192 header = CERT_HEADER;
193 trailer = CERT_TRAILER;
195 case CRYPT_STRING_BASE64REQUESTHEADER:
196 header = CERT_REQUEST_HEADER;
197 trailer = CERT_REQUEST_TRAILER;
199 case CRYPT_STRING_BASE64X509CRLHEADER:
200 header = X509_HEADER;
201 trailer = X509_TRAILER;
206 encodeBase64A(pbBinary, cbBinary, sep, NULL, &charsNeeded);
208 charsNeeded += strlen(sep);
210 charsNeeded += strlen(header) + strlen(sep);
212 charsNeeded += strlen(trailer) + strlen(sep);
213 if (charsNeeded <= *pcchString)
215 LPSTR ptr = pszString;
216 DWORD size = charsNeeded;
228 encodeBase64A(pbBinary, cbBinary, sep, ptr, &size);
232 strcpy(ptr, trailer);
240 *pcchString = charsNeeded - 1;
244 *pcchString = charsNeeded;
245 SetLastError(ERROR_INSUFFICIENT_BUFFER);
249 *pcchString = charsNeeded;
253 BOOL WINAPI CryptBinaryToStringA(const BYTE *pbBinary,
254 DWORD cbBinary, DWORD dwFlags, LPSTR pszString, DWORD *pcchString)
256 BinaryToStringAFunc encoder = NULL;
258 TRACE("(%p, %d, %08x, %p, %p)\n", pbBinary, cbBinary, dwFlags, pszString,
263 SetLastError(ERROR_INVALID_PARAMETER);
268 SetLastError(ERROR_INVALID_PARAMETER);
272 switch (dwFlags & 0x0fffffff)
274 case CRYPT_STRING_BINARY:
275 encoder = EncodeBinaryToBinaryA;
277 case CRYPT_STRING_BASE64:
278 case CRYPT_STRING_BASE64HEADER:
279 case CRYPT_STRING_BASE64REQUESTHEADER:
280 case CRYPT_STRING_BASE64X509CRLHEADER:
281 encoder = BinaryToBase64A;
283 case CRYPT_STRING_HEX:
284 case CRYPT_STRING_HEXASCII:
285 case CRYPT_STRING_HEXADDR:
286 case CRYPT_STRING_HEXASCIIADDR:
287 FIXME("Unimplemented type %d\n", dwFlags & 0x0fffffff);
290 SetLastError(ERROR_INVALID_PARAMETER);
293 return encoder(pbBinary, cbBinary, dwFlags, pszString, pcchString);
296 static LONG encodeBase64W(const BYTE *in_buf, int in_len, LPCWSTR sep,
297 WCHAR* out_buf, DWORD *out_len)
300 const BYTE *d = in_buf;
301 int bytes = (in_len*8 + 5)/6, pad_bytes = (bytes % 4) ? 4 - (bytes % 4) : 0;
305 TRACE("bytes is %d, pad bytes is %d\n", bytes, pad_bytes);
306 needed = bytes + pad_bytes + 1;
308 needed += (needed / 64 + 1) * strlenW(sep);
310 if (needed > *out_len)
313 return ERROR_INSUFFICIENT_BUFFER;
318 /* Three bytes of input give 4 chars of output */
325 if (sep && i && i % 64 == 0)
330 /* first char is the first 6 bits of the first byte*/
331 *ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
332 /* second char is the last 2 bits of the first byte and the first 4
333 * bits of the second byte */
334 *ptr++ = b64[ ((d[0] << 4) & 0x30) | (d[1] >> 4 & 0x0f)];
335 /* third char is the last 4 bits of the second byte and the first 2
336 * bits of the third byte */
337 *ptr++ = b64[ ((d[1] << 2) & 0x3c) | (d[2] >> 6 & 0x03)];
338 /* fourth char is the remaining 6 bits of the third byte */
339 *ptr++ = b64[ d[2] & 0x3f];
348 /* first char is the first 6 bits of the first byte*/
349 *ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
350 /* second char is the last 2 bits of the first byte and the first 4
351 * bits of the second byte */
352 *ptr++ = b64[ ((d[0] << 4) & 0x30) | (d[1] >> 4 & 0x0f)];
353 /* third char is the last 4 bits of the second byte padded with
355 *ptr++ = b64[ ((d[1] << 2) & 0x3c) ];
356 /* fourth char is a = to indicate one byte of padding */
360 /* first char is the first 6 bits of the first byte*/
361 *ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
362 /* second char is the last 2 bits of the first byte padded with
364 *ptr++ = b64[ ((d[0] << 4) & 0x30)];
365 /* third char is = to indicate padding */
367 /* fourth char is = to indicate padding */
374 return ERROR_SUCCESS;
377 static BOOL BinaryToBase64W(const BYTE *pbBinary,
378 DWORD cbBinary, DWORD dwFlags, LPWSTR pszString, DWORD *pcchString)
380 static const WCHAR crlf[] = { '\r','\n',0 }, lf[] = { '\n',0 };
382 LPCWSTR header = NULL, trailer = NULL, sep;
385 if (dwFlags & CRYPT_STRING_NOCR)
387 else if (dwFlags & CRYPT_STRING_NOCRLF)
391 switch (dwFlags & 0x0fffffff)
393 case CRYPT_STRING_BASE64:
394 /* no header or footer */
396 case CRYPT_STRING_BASE64HEADER:
397 header = CERT_HEADER_W;
398 trailer = CERT_TRAILER_W;
400 case CRYPT_STRING_BASE64REQUESTHEADER:
401 header = CERT_REQUEST_HEADER_W;
402 trailer = CERT_REQUEST_TRAILER_W;
404 case CRYPT_STRING_BASE64X509CRLHEADER:
405 header = X509_HEADER_W;
406 trailer = X509_TRAILER_W;
411 encodeBase64W(pbBinary, cbBinary, sep, NULL, &charsNeeded);
413 charsNeeded += strlenW(sep);
415 charsNeeded += strlenW(header) + strlenW(sep);
417 charsNeeded += strlenW(trailer) + strlenW(sep);
418 if (charsNeeded <= *pcchString)
420 LPWSTR ptr = pszString;
421 DWORD size = charsNeeded;
425 strcpyW(ptr, header);
433 encodeBase64W(pbBinary, cbBinary, sep, ptr, &size);
437 strcpyW(ptr, trailer);
445 *pcchString = charsNeeded - 1;
449 *pcchString = charsNeeded;
450 SetLastError(ERROR_INSUFFICIENT_BUFFER);
454 *pcchString = charsNeeded;
458 BOOL WINAPI CryptBinaryToStringW(const BYTE *pbBinary,
459 DWORD cbBinary, DWORD dwFlags, LPWSTR pszString, DWORD *pcchString)
461 BinaryToStringWFunc encoder = NULL;
463 TRACE("(%p, %d, %08x, %p, %p)\n", pbBinary, cbBinary, dwFlags, pszString,
468 SetLastError(ERROR_INVALID_PARAMETER);
473 SetLastError(ERROR_INVALID_PARAMETER);
477 switch (dwFlags & 0x0fffffff)
479 case CRYPT_STRING_BASE64:
480 case CRYPT_STRING_BASE64HEADER:
481 case CRYPT_STRING_BASE64REQUESTHEADER:
482 case CRYPT_STRING_BASE64X509CRLHEADER:
483 encoder = BinaryToBase64W;
485 case CRYPT_STRING_BINARY:
486 case CRYPT_STRING_HEX:
487 case CRYPT_STRING_HEXASCII:
488 case CRYPT_STRING_HEXADDR:
489 case CRYPT_STRING_HEXASCIIADDR:
490 FIXME("Unimplemented type %d\n", dwFlags & 0x0fffffff);
493 SetLastError(ERROR_INVALID_PARAMETER);
496 return encoder(pbBinary, cbBinary, dwFlags, pszString, pcchString);
499 static inline BYTE decodeBase64Byte(int c)
503 if (c >= 'A' && c <= 'Z')
505 else if (c >= 'a' && c <= 'z')
507 else if (c >= '0' && c <= '9')
518 static LONG decodeBase64Block(const char *in_buf, int in_len,
519 const char **nextBlock, PBYTE out_buf, DWORD *out_len)
522 const char *d = in_buf;
523 int ip0, ip1, ip2, ip3;
526 return ERROR_INVALID_DATA;
531 if ((ip0 = decodeBase64Byte(d[0])) > 63)
532 return ERROR_INVALID_DATA;
533 if ((ip1 = decodeBase64Byte(d[1])) > 63)
534 return ERROR_INVALID_DATA;
537 out_buf[i] = (ip0 << 2) | (ip1 >> 4);
540 else if (d[3] == '=')
542 if ((ip0 = decodeBase64Byte(d[0])) > 63)
543 return ERROR_INVALID_DATA;
544 if ((ip1 = decodeBase64Byte(d[1])) > 63)
545 return ERROR_INVALID_DATA;
546 if ((ip2 = decodeBase64Byte(d[2])) > 63)
547 return ERROR_INVALID_DATA;
551 out_buf[i + 0] = (ip0 << 2) | (ip1 >> 4);
552 out_buf[i + 1] = (ip1 << 4) | (ip2 >> 2);
558 if ((ip0 = decodeBase64Byte(d[0])) > 63)
559 return ERROR_INVALID_DATA;
560 if ((ip1 = decodeBase64Byte(d[1])) > 63)
561 return ERROR_INVALID_DATA;
562 if ((ip2 = decodeBase64Byte(d[2])) > 63)
563 return ERROR_INVALID_DATA;
564 if ((ip3 = decodeBase64Byte(d[3])) > 63)
565 return ERROR_INVALID_DATA;
569 out_buf[i + 0] = (ip0 << 2) | (ip1 >> 4);
570 out_buf[i + 1] = (ip1 << 4) | (ip2 >> 2);
571 out_buf[i + 2] = (ip2 << 6) | ip3;
575 if (len >= 6 && d[4] == '\r' && d[5] == '\n')
577 else if (len >= 5 && d[4] == '\n')
579 else if (len >= 4 && d[4])
584 return ERROR_SUCCESS;
587 /* Unlike CryptStringToBinaryA, cchString is guaranteed to be the length of the
590 typedef LONG (*StringToBinaryAFunc)(LPCSTR pszString, DWORD cchString,
591 BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags);
593 static LONG Base64ToBinaryA(LPCSTR pszString, DWORD cchString,
594 BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
596 LONG ret = ERROR_SUCCESS;
597 const char *nextBlock;
600 nextBlock = pszString;
601 while (nextBlock && !ret)
605 ret = decodeBase64Block(nextBlock, cchString - (nextBlock - pszString),
606 &nextBlock, pbBinary ? pbBinary + outLen : NULL, &len);
609 if (cchString - (nextBlock - pszString) <= 0)
618 *pdwFlags = CRYPT_STRING_BASE64;
620 else if (ret == ERROR_INSUFFICIENT_BUFFER)
628 static LONG Base64WithHeaderAndTrailerToBinaryA(LPCSTR pszString,
629 DWORD cchString, LPCSTR header, LPCSTR trailer, BYTE *pbBinary,
630 DWORD *pcbBinary, DWORD *pdwSkip)
635 if (cchString > strlen(header) + strlen(trailer)
636 && (ptr = strstr(pszString, header)) != NULL)
638 LPCSTR trailerSpot = pszString + cchString - strlen(trailer);
640 if (pszString[cchString - 1] == '\n')
645 if (pszString[cchString - 1] == '\r')
650 if (!strncmp(trailerSpot, trailer, strlen(trailer)))
653 *pdwSkip = ptr - pszString;
654 ptr += strlen(header);
655 if (*ptr == '\r') ptr++;
656 if (*ptr == '\n') ptr++;
657 cchString -= ptr - pszString + strlen(trailer);
658 ret = Base64ToBinaryA(ptr, cchString, pbBinary, pcbBinary, NULL,
662 ret = ERROR_INVALID_DATA;
665 ret = ERROR_INVALID_DATA;
669 static LONG Base64HeaderToBinaryA(LPCSTR pszString, DWORD cchString,
670 BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
672 LONG ret = Base64WithHeaderAndTrailerToBinaryA(pszString, cchString,
673 CERT_HEADER, CERT_TRAILER, pbBinary, pcbBinary, pdwSkip);
675 if (!ret && pdwFlags)
676 *pdwFlags = CRYPT_STRING_BASE64HEADER;
680 static LONG Base64RequestHeaderToBinaryA(LPCSTR pszString, DWORD cchString,
681 BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
683 LONG ret = Base64WithHeaderAndTrailerToBinaryA(pszString, cchString,
684 CERT_REQUEST_HEADER, CERT_REQUEST_TRAILER, pbBinary, pcbBinary, pdwSkip);
686 if (!ret && pdwFlags)
687 *pdwFlags = CRYPT_STRING_BASE64REQUESTHEADER;
691 static LONG Base64X509HeaderToBinaryA(LPCSTR pszString, DWORD cchString,
692 BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
694 LONG ret = Base64WithHeaderAndTrailerToBinaryA(pszString, cchString,
695 X509_HEADER, X509_TRAILER, pbBinary, pcbBinary, pdwSkip);
697 if (!ret && pdwFlags)
698 *pdwFlags = CRYPT_STRING_BASE64X509CRLHEADER;
702 static LONG Base64AnyToBinaryA(LPCSTR pszString, DWORD cchString,
703 BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
707 ret = Base64HeaderToBinaryA(pszString, cchString, pbBinary, pcbBinary,
709 if (ret == ERROR_INVALID_DATA)
710 ret = Base64ToBinaryA(pszString, cchString, pbBinary, pcbBinary,
715 static LONG DecodeBinaryToBinaryA(LPCSTR pszString, DWORD cchString,
716 BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
718 LONG ret = ERROR_SUCCESS;
720 if (*pcbBinary < cchString)
723 *pcbBinary = cchString;
726 ret = ERROR_INSUFFICIENT_BUFFER;
727 *pcbBinary = cchString;
733 memcpy(pbBinary, pszString, cchString);
734 *pcbBinary = cchString;
739 static LONG DecodeAnyA(LPCSTR pszString, DWORD cchString,
740 BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
744 ret = Base64HeaderToBinaryA(pszString, cchString, pbBinary, pcbBinary,
746 if (ret == ERROR_INVALID_DATA)
747 ret = Base64ToBinaryA(pszString, cchString, pbBinary, pcbBinary,
749 if (ret == ERROR_INVALID_DATA)
750 ret = DecodeBinaryToBinaryA(pszString, cchString, pbBinary, pcbBinary,
755 BOOL WINAPI CryptStringToBinaryA(LPCSTR pszString,
756 DWORD cchString, DWORD dwFlags, BYTE *pbBinary, DWORD *pcbBinary,
757 DWORD *pdwSkip, DWORD *pdwFlags)
759 StringToBinaryAFunc decoder;
762 TRACE("(%s, %d, %08x, %p, %p, %p, %p)\n", debugstr_a(pszString),
763 cchString, dwFlags, pbBinary, pcbBinary, pdwSkip, pdwFlags);
767 SetLastError(ERROR_INVALID_PARAMETER);
770 /* Only the bottom byte contains valid types */
771 if (dwFlags & 0xfffffff0)
773 SetLastError(ERROR_INVALID_DATA);
778 case CRYPT_STRING_BASE64_ANY:
779 decoder = Base64AnyToBinaryA;
781 case CRYPT_STRING_BASE64:
782 decoder = Base64ToBinaryA;
784 case CRYPT_STRING_BASE64HEADER:
785 decoder = Base64HeaderToBinaryA;
787 case CRYPT_STRING_BASE64REQUESTHEADER:
788 decoder = Base64RequestHeaderToBinaryA;
790 case CRYPT_STRING_BASE64X509CRLHEADER:
791 decoder = Base64X509HeaderToBinaryA;
793 case CRYPT_STRING_BINARY:
794 decoder = DecodeBinaryToBinaryA;
796 case CRYPT_STRING_ANY:
797 decoder = DecodeAnyA;
799 case CRYPT_STRING_HEX:
800 case CRYPT_STRING_HEXASCII:
801 case CRYPT_STRING_HEXADDR:
802 case CRYPT_STRING_HEXASCIIADDR:
803 FIXME("Unimplemented type %d\n", dwFlags & 0x7fffffff);
806 SetLastError(ERROR_INVALID_PARAMETER);
810 cchString = strlen(pszString);
811 ret = decoder(pszString, cchString, pbBinary, pcbBinary, pdwSkip, pdwFlags);
814 return (ret == ERROR_SUCCESS) ? TRUE : FALSE;
817 static LONG decodeBase64BlockW(const WCHAR *in_buf, int in_len,
818 const WCHAR **nextBlock, PBYTE out_buf, DWORD *out_len)
821 const WCHAR *d = in_buf;
822 int ip0, ip1, ip2, ip3;
825 return ERROR_INVALID_DATA;
830 if ((ip0 = decodeBase64Byte(d[0])) > 63)
831 return ERROR_INVALID_DATA;
832 if ((ip1 = decodeBase64Byte(d[1])) > 63)
833 return ERROR_INVALID_DATA;
836 out_buf[i] = (ip0 << 2) | (ip1 >> 4);
839 else if (d[3] == '=')
841 if ((ip0 = decodeBase64Byte(d[0])) > 63)
842 return ERROR_INVALID_DATA;
843 if ((ip1 = decodeBase64Byte(d[1])) > 63)
844 return ERROR_INVALID_DATA;
845 if ((ip2 = decodeBase64Byte(d[2])) > 63)
846 return ERROR_INVALID_DATA;
850 out_buf[i + 0] = (ip0 << 2) | (ip1 >> 4);
851 out_buf[i + 1] = (ip1 << 4) | (ip2 >> 2);
857 if ((ip0 = decodeBase64Byte(d[0])) > 63)
858 return ERROR_INVALID_DATA;
859 if ((ip1 = decodeBase64Byte(d[1])) > 63)
860 return ERROR_INVALID_DATA;
861 if ((ip2 = decodeBase64Byte(d[2])) > 63)
862 return ERROR_INVALID_DATA;
863 if ((ip3 = decodeBase64Byte(d[3])) > 63)
864 return ERROR_INVALID_DATA;
868 out_buf[i + 0] = (ip0 << 2) | (ip1 >> 4);
869 out_buf[i + 1] = (ip1 << 4) | (ip2 >> 2);
870 out_buf[i + 2] = (ip2 << 6) | ip3;
874 if (len >= 6 && d[4] == '\r' && d[5] == '\n')
876 else if (len >= 5 && d[4] == '\n')
878 else if (len >= 4 && d[4])
883 return ERROR_SUCCESS;
886 /* Unlike CryptStringToBinaryW, cchString is guaranteed to be the length of the
889 typedef LONG (*StringToBinaryWFunc)(LPCWSTR pszString, DWORD cchString,
890 BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags);
892 static LONG Base64ToBinaryW(LPCWSTR pszString, DWORD cchString,
893 BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
895 LONG ret = ERROR_SUCCESS;
896 const WCHAR *nextBlock;
899 nextBlock = pszString;
900 while (nextBlock && !ret)
904 ret = decodeBase64BlockW(nextBlock, cchString - (nextBlock - pszString),
905 &nextBlock, pbBinary ? pbBinary + outLen : NULL, &len);
908 if (cchString - (nextBlock - pszString) <= 0)
917 *pdwFlags = CRYPT_STRING_BASE64;
919 else if (ret == ERROR_INSUFFICIENT_BUFFER)
927 static LONG Base64WithHeaderAndTrailerToBinaryW(LPCWSTR pszString,
928 DWORD cchString, LPCWSTR header, LPCWSTR trailer, BYTE *pbBinary,
929 DWORD *pcbBinary, DWORD *pdwSkip)
934 if (cchString > strlenW(header) + strlenW(trailer)
935 && (ptr = strstrW(pszString, header)) != NULL)
937 LPCWSTR trailerSpot = pszString + cchString - strlenW(trailer);
939 if (pszString[cchString - 1] == '\n')
944 if (pszString[cchString - 1] == '\r')
949 if (!strncmpW(trailerSpot, trailer, strlenW(trailer)))
952 *pdwSkip = ptr - pszString;
953 ptr += strlenW(header);
954 if (*ptr == '\r') ptr++;
955 if (*ptr == '\n') ptr++;
956 cchString -= ptr - pszString + strlenW(trailer);
957 ret = Base64ToBinaryW(ptr, cchString, pbBinary, pcbBinary, NULL,
961 ret = ERROR_INVALID_DATA;
964 ret = ERROR_INVALID_DATA;
968 static LONG Base64HeaderToBinaryW(LPCWSTR pszString, DWORD cchString,
969 BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
971 LONG ret = Base64WithHeaderAndTrailerToBinaryW(pszString, cchString,
972 CERT_HEADER_W, CERT_TRAILER_W, pbBinary, pcbBinary, pdwSkip);
974 if (!ret && pdwFlags)
975 *pdwFlags = CRYPT_STRING_BASE64HEADER;
979 static LONG Base64RequestHeaderToBinaryW(LPCWSTR pszString, DWORD cchString,
980 BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
982 LONG ret = Base64WithHeaderAndTrailerToBinaryW(pszString, cchString,
983 CERT_REQUEST_HEADER_W, CERT_REQUEST_TRAILER_W, pbBinary, pcbBinary,
986 if (!ret && pdwFlags)
987 *pdwFlags = CRYPT_STRING_BASE64REQUESTHEADER;
991 static LONG Base64X509HeaderToBinaryW(LPCWSTR pszString, DWORD cchString,
992 BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
994 LONG ret = Base64WithHeaderAndTrailerToBinaryW(pszString, cchString,
995 X509_HEADER_W, X509_TRAILER_W, pbBinary, pcbBinary, pdwSkip);
997 if (!ret && pdwFlags)
998 *pdwFlags = CRYPT_STRING_BASE64X509CRLHEADER;
1002 static LONG Base64AnyToBinaryW(LPCWSTR pszString, DWORD cchString,
1003 BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
1007 ret = Base64HeaderToBinaryW(pszString, cchString, pbBinary, pcbBinary,
1009 if (ret == ERROR_INVALID_DATA)
1010 ret = Base64ToBinaryW(pszString, cchString, pbBinary, pcbBinary,
1015 static LONG DecodeBinaryToBinaryW(LPCWSTR pszString, DWORD cchString,
1016 BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
1018 LONG ret = ERROR_SUCCESS;
1020 if (*pcbBinary < cchString)
1023 *pcbBinary = cchString;
1026 ret = ERROR_INSUFFICIENT_BUFFER;
1027 *pcbBinary = cchString;
1033 memcpy(pbBinary, pszString, cchString * sizeof(WCHAR));
1034 *pcbBinary = cchString * sizeof(WCHAR);
1039 static LONG DecodeAnyW(LPCWSTR pszString, DWORD cchString,
1040 BYTE *pbBinary, DWORD *pcbBinary, DWORD *pdwSkip, DWORD *pdwFlags)
1044 ret = Base64HeaderToBinaryW(pszString, cchString, pbBinary, pcbBinary,
1046 if (ret == ERROR_INVALID_DATA)
1047 ret = Base64ToBinaryW(pszString, cchString, pbBinary, pcbBinary,
1049 if (ret == ERROR_INVALID_DATA)
1050 ret = DecodeBinaryToBinaryW(pszString, cchString, pbBinary, pcbBinary,
1055 BOOL WINAPI CryptStringToBinaryW(LPCWSTR pszString,
1056 DWORD cchString, DWORD dwFlags, BYTE *pbBinary, DWORD *pcbBinary,
1057 DWORD *pdwSkip, DWORD *pdwFlags)
1059 StringToBinaryWFunc decoder;
1062 TRACE("(%s, %d, %08x, %p, %p, %p, %p)\n", debugstr_w(pszString),
1063 cchString, dwFlags, pbBinary, pcbBinary, pdwSkip, pdwFlags);
1067 SetLastError(ERROR_INVALID_PARAMETER);
1070 /* Only the bottom byte contains valid types */
1071 if (dwFlags & 0xfffffff0)
1073 SetLastError(ERROR_INVALID_DATA);
1078 case CRYPT_STRING_BASE64_ANY:
1079 decoder = Base64AnyToBinaryW;
1081 case CRYPT_STRING_BASE64:
1082 decoder = Base64ToBinaryW;
1084 case CRYPT_STRING_BASE64HEADER:
1085 decoder = Base64HeaderToBinaryW;
1087 case CRYPT_STRING_BASE64REQUESTHEADER:
1088 decoder = Base64RequestHeaderToBinaryW;
1090 case CRYPT_STRING_BASE64X509CRLHEADER:
1091 decoder = Base64X509HeaderToBinaryW;
1093 case CRYPT_STRING_BINARY:
1094 decoder = DecodeBinaryToBinaryW;
1096 case CRYPT_STRING_ANY:
1097 decoder = DecodeAnyW;
1099 case CRYPT_STRING_HEX:
1100 case CRYPT_STRING_HEXASCII:
1101 case CRYPT_STRING_HEXADDR:
1102 case CRYPT_STRING_HEXASCIIADDR:
1103 FIXME("Unimplemented type %d\n", dwFlags & 0x7fffffff);
1106 SetLastError(ERROR_INVALID_PARAMETER);
1110 cchString = strlenW(pszString);
1111 ret = decoder(pszString, cchString, pbBinary, pcbBinary, pdwSkip, pdwFlags);
1114 return (ret == ERROR_SUCCESS) ? TRUE : FALSE;