| /* |
| * 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); |
| |
| 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 = NULL; |
| DWORD charsNeeded; |
| |
| if (dwFlags & CRYPT_STRING_NOCR) |
| sep = lf; |
| else |
| sep = crlf; |
| switch (dwFlags & 0x7fffffff) |
| { |
| 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); |
| charsNeeded += strlen(sep); |
| 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 & 0x7fffffff) |
| { |
| 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 & 0x7fffffff); |
| /* 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; |
| } |
