| index : pacman | |
| Archlinux32 fork of pacman | gitolite user |
| summaryrefslogtreecommitdiff |
| -rw-r--r-- | lib/libalpm/Makefile.am | 1 | ||||
| -rw-r--r-- | lib/libalpm/base64.c | 190 | ||||
| -rw-r--r-- | lib/libalpm/base64.h | 68 |
diff --git a/lib/libalpm/Makefile.am b/lib/libalpm/Makefile.am index 1bda5714..7c411b2c 100644 --- a/lib/libalpm/Makefile.am +++ b/lib/libalpm/Makefile.am @@ -25,6 +25,7 @@ libalpm_la_SOURCES = \ alpm.h alpm.c \ alpm_list.h alpm_list.c \ backup.h backup.c \ + base64.h base64.c \ be_local.c \ be_package.c \ be_sync.c \ diff --git a/lib/libalpm/base64.c b/lib/libalpm/base64.c new file mode 100644 index 00000000..fa8bec5c --- /dev/null +++ b/lib/libalpm/base64.c @@ -0,0 +1,190 @@ +/* + * RFC 1521 base64 encoding/decoding + * + * Copyright (C) 2006-2010, Brainspark B.V. + * + * This file is part of PolarSSL (http://www.polarssl.org) + * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org> + * + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +/* + * Pacman Notes: + * + * Taken from the PolarSSL project at www.polarssl.org under terms of the + * GPL. This is from version 0.14.2 of the library, and has been modified + * as following, which may be helpful for future updates: + * * remove "polarssl/config.h" include + * * change include from "polarssl/base64.h" to "base64.h" + * * removal of SELF_TEST code + */ + +#include "base64.h" + +static const unsigned char base64_enc_map[64] = +{ + 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', + 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', + 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', + 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', + 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', + 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', + '8', '9', '+', '/' +}; + +static const unsigned char base64_dec_map[128] = +{ + 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, + 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, + 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, + 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, + 127, 127, 127, 62, 127, 127, 127, 63, 52, 53, + 54, 55, 56, 57, 58, 59, 60, 61, 127, 127, + 127, 64, 127, 127, 127, 0, 1, 2, 3, 4, + 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, + 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, + 25, 127, 127, 127, 127, 127, 127, 26, 27, 28, + 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, + 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, + 49, 50, 51, 127, 127, 127, 127, 127 +}; + +/* + * Encode a buffer into base64 format + */ +int base64_encode( unsigned char *dst, int *dlen, + const unsigned char *src, int slen ) +{ + int i, n; + int C1, C2, C3; + unsigned char *p; + + if( slen == 0 ) + return( 0 ); + + n = (slen << 3) / 6; + + switch( (slen << 3) - (n * 6) ) + { + case 2: n += 3; break; + case 4: n += 2; break; + default: break; + } + + if( *dlen < n + 1 ) + { + *dlen = n + 1; + return( POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL ); + } + + n = (slen / 3) * 3; + + for( i = 0, p = dst; i < n; i += 3 ) + { + C1 = *src++; + C2 = *src++; + C3 = *src++; + + *p++ = base64_enc_map[(C1 >> 2) & 0x3F]; + *p++ = base64_enc_map[(((C1 & 3) << 4) + (C2 >> 4)) & 0x3F]; + *p++ = base64_enc_map[(((C2 & 15) << 2) + (C3 >> 6)) & 0x3F]; + *p++ = base64_enc_map[C3 & 0x3F]; + } + + if( i < slen ) + { + C1 = *src++; + C2 = ((i + 1) < slen) ? *src++ : 0; + + *p++ = base64_enc_map[(C1 >> 2) & 0x3F]; + *p++ = base64_enc_map[(((C1 & 3) << 4) + (C2 >> 4)) & 0x3F]; + + if( (i + 1) < slen ) + *p++ = base64_enc_map[((C2 & 15) << 2) & 0x3F]; + else *p++ = '='; + + *p++ = '='; + } + + *dlen = p - dst; + *p = 0; + + return( 0 ); +} + +/* + * Decode a base64-formatted buffer + */ +int base64_decode( unsigned char *dst, int *dlen, + const unsigned char *src, int slen ) +{ + int i, j, n; + unsigned long x; + unsigned char *p; + + for( i = j = n = 0; i < slen; i++ ) + { + if( ( slen - i ) >= 2 && + src[i] == '\r' && src[i + 1] == '\n' ) + continue; + + if( src[i] == '\n' ) + continue; + + if( src[i] == '=' && ++j > 2 ) + return( POLARSSL_ERR_BASE64_INVALID_CHARACTER ); + + if( src[i] > 127 || base64_dec_map[src[i]] == 127 ) + return( POLARSSL_ERR_BASE64_INVALID_CHARACTER ); + + if( base64_dec_map[src[i]] < 64 && j != 0 ) + return( POLARSSL_ERR_BASE64_INVALID_CHARACTER ); + + n++; + } + + if( n == 0 ) + return( 0 ); + + n = ((n * 6) + 7) >> 3; + + if( *dlen < n ) + { + *dlen = n; + return( POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL ); + } + + for( j = 3, n = x = 0, p = dst; i > 0; i--, src++ ) + { + if( *src == '\r' || *src == '\n' ) + continue; + + j -= ( base64_dec_map[*src] == 64 ); + x = (x << 6) | ( base64_dec_map[*src] & 0x3F ); + + if( ++n == 4 ) + { + n = 0; + if( j > 0 ) *p++ = (unsigned char)( x >> 16 ); + if( j > 1 ) *p++ = (unsigned char)( x >> 8 ); + if( j > 2 ) *p++ = (unsigned char)( x ); + } + } + + *dlen = p - dst; + + return( 0 ); +} diff --git a/lib/libalpm/base64.h b/lib/libalpm/base64.h new file mode 100644 index 00000000..0ae9612c --- /dev/null +++ b/lib/libalpm/base64.h @@ -0,0 +1,68 @@ +/** + * \file base64.h + * + * Copyright (C) 2006-2010, Brainspark B.V. + * + * This file is part of PolarSSL (http://www.polarssl.org) + * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org> + * + * All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef _BASE64_H +#define _BASE64_H + +#define POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL 0x0010 +#define POLARSSL_ERR_BASE64_INVALID_CHARACTER 0x0012 + +/** + * \brief Encode a buffer into base64 format + * + * \param dst destination buffer + * \param dlen size of the buffer + * \param src source buffer + * \param slen amount of data to be encoded + * + * \return 0 if successful, or POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL. + * *dlen is always updated to reflect the amount + * of data that has (or would have) been written. + * + * \note Call this function with *dlen = 0 to obtain the + * required buffer size in *dlen + */ +int base64_encode( unsigned char *dst, int *dlen, + const unsigned char *src, int slen ); + +/** + * \brief Decode a base64-formatted buffer + * + * \param dst destination buffer + * \param dlen size of the buffer + * \param src source buffer + * \param slen amount of data to be decoded + * + * \return 0 if successful, POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL, or + * POLARSSL_ERR_BASE64_INVALID_DATA if the input data is not + * correct. *dlen is always updated to reflect the amount + * of data that has (or would have) been written. + * + * \note Call this function with *dlen = 0 to obtain the + * required buffer size in *dlen + */ +int base64_decode( unsigned char *dst, int *dlen, + const unsigned char *src, int slen ); + +#endif /* base64.h */ |