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/* Copyright (C) 1998,1999 Nikos Mavroyanopoulos This library is free |
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* software; you can redistribute it and/or modify it under the terms of the |
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* GNU Library General Public License as published by the Free Software |
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* Foundation; either version 2 of the License, or (at your option) any |
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* later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public |
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* License along with this library; if not, write to the |
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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* Boston, MA 02111-1307, USA. |
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*/ |
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|
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/* $Id: mcrypt_extra.c,v 1.7 1999/10/20 03:38:11 nmav Exp $ */ |
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|
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#ifndef LIBDEFS_H |
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#define LIBDEFS_H |
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#include <libdefs.h> |
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#endif |
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#include <bzero.h> |
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#include <swap.h> |
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#include <mcrypt_int.h> |
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#include <blowfish.h> |
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#include <3-way.h> |
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#include <des.h> |
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#include <safer.h> |
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#include <tean.h> |
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#include <xmemory.h> |
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#include <rc2.h> |
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#include <loki97.h> |
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#include <rijndael.h> |
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#include <ctype.h> |
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|
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#define MCRYPT_ENTRY(name, blksize, keysize, block) \ |
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{ #name, name, blksize, keysize, block } |
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|
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struct mcrypt_algorithm_entry { |
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char *name; |
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int id; |
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size_t blocksize; |
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size_t keysize; |
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int block; |
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}; |
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|
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static mcrypt_algorithm_entry algorithms[] = { |
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MCRYPT_ENTRY(MCRYPT_BLOWFISH, 8, 56, 1), |
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MCRYPT_ENTRY(MCRYPT_DES, 8, 8, 1), |
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MCRYPT_ENTRY(MCRYPT_TRIPLEDES, 8, 24, 1), |
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MCRYPT_ENTRY(MCRYPT_THREEWAY, 12, 12, 1), |
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MCRYPT_ENTRY(MCRYPT_GOST, 8, 32, 1), |
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MCRYPT_ENTRY(MCRYPT_SAFER_SK64, 8, 8, 1), |
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MCRYPT_ENTRY(MCRYPT_SAFER_SK128, 8, 16, 1), |
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MCRYPT_ENTRY(MCRYPT_CAST_128, 8, 16, 1), |
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MCRYPT_ENTRY(MCRYPT_XTEA, 8, 16, 1), |
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MCRYPT_ENTRY(MCRYPT_RC2, 8, 128, 1), |
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MCRYPT_ENTRY(MCRYPT_TWOFISH, 16, 32, 1), |
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MCRYPT_ENTRY(MCRYPT_CAST_256, 16, 32, 1), |
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MCRYPT_ENTRY(MCRYPT_SAFERPLUS, 16, 32, 1), |
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MCRYPT_ENTRY(MCRYPT_LOKI97, 16, 32, 1), |
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MCRYPT_ENTRY(MCRYPT_SERPENT, 16, 32, 1), |
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MCRYPT_ENTRY(MCRYPT_RIJNDAEL_128, 16, 32, 1), |
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MCRYPT_ENTRY(MCRYPT_ARCFOUR, 1, 256, 0), |
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MCRYPT_ENTRY(MCRYPT_ENIGMA, 1, 13, 0), |
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{0} |
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}; |
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|
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void tolow( char* str, int size) { |
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int i; |
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|
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for(i=0;i<size;i++) { |
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str[i]=tolower(str[i]); |
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} |
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} |
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|
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#define MCRYPT_LOOP(b) \ |
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mcrypt_algorithm_entry *p; \ |
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for(p = algorithms; p->name != NULL; p++) { b ; } |
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|
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#define MCRYPT_ALG_LOOP(a) \ |
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MCRYPT_LOOP( if(p->id == algorithm) { a; break; } ) |
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|
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|
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#define MCRYPT_MODE_ENTRY(name, block_algo, IV, block) \ |
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{ #name, name, block_algo, IV, block } |
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|
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struct mcrypt_mode_entry { |
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char *name; |
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int id; |
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int block_algo; |
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int IV; |
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int block; |
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}; |
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|
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static mcrypt_mode_entry modes[] = { |
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MCRYPT_MODE_ENTRY(MCRYPT_ECB, 1, 0, 1), |
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MCRYPT_MODE_ENTRY(MCRYPT_CBC, 1, 1, 1), |
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MCRYPT_MODE_ENTRY(MCRYPT_CFB, 1, 1, 0), |
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MCRYPT_MODE_ENTRY(MCRYPT_OFB, 1, 1, 0), |
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MCRYPT_MODE_ENTRY(MCRYPT_nOFB, 1, 1, 1), |
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MCRYPT_MODE_ENTRY(MCRYPT_STREAM, 0, 0, 0), |
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{0} |
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}; |
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|
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|
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#define MCRYPT_MODE_LOOP(b) \ |
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mcrypt_mode_entry *p; \ |
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for(p = modes; p->name != NULL; p++) { b ; } |
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|
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#define MCRYPT_MLOOP(a) \ |
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MCRYPT_MODE_LOOP( if(p->id == mode) { a; break; } ) |
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|
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|
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int mcrypt_mode_has_iv(int mode) |
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{ |
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int ret = 0; |
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|
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MCRYPT_MLOOP(ret = p->IV); |
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return ret; |
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|
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} |
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|
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|
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|
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|
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int mcrypt_get_block_size(int algorithm) |
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{ |
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size_t ret = 0; |
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|
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MCRYPT_ALG_LOOP(ret = p->blocksize); |
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return ret; |
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|
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} |
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|
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int mcrypt_is_block_algorithm(int algorithm) |
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{ |
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size_t ret = 0; |
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|
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MCRYPT_ALG_LOOP(ret = p->block); |
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return ret; |
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|
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} |
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|
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int mcrypt_is_block_algorithm_mode(int mode) |
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{ |
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int ret = 0; |
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|
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MCRYPT_MLOOP(ret = p->block_algo); |
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return ret; |
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|
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} |
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|
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int mcrypt_is_block_mode(int mode) |
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{ |
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int ret = 0; |
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|
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MCRYPT_MLOOP(ret = p->block); |
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return ret; |
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|
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} |
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|
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int mcrypt_get_key_size(int algorithm) |
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{ /* In bytes */ |
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size_t ret = 0; |
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|
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MCRYPT_ALG_LOOP(ret = p->keysize); |
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return ret; |
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|
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} |
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|
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|
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|
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char *mcrypt_get_algorithms_name(int algorithm) |
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{ |
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char *ret = NULL; |
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char *pointerTo_; |
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|
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/* avoid prefix */ |
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MCRYPT_ALG_LOOP(ret = strdup(p->name + sizeof("MCRYPT_") - 1)); |
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|
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|
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if (ret != NULL) { |
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tolow( ret, strlen(ret)); |
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pointerTo_ = strchr(ret, '_'); |
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|
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while (pointerTo_ != NULL) { |
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*pointerTo_ = '-'; |
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pointerTo_ = strchr(ret, '_'); |
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} |
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} |
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return ret; |
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} |
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|
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|
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|
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int mcrypt_is_ok_algorithm(int algorithm) |
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{ |
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char *y = mcrypt_get_algorithms_name(algorithm); |
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|
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if (y != NULL) { |
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free(y); |
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return 0; |
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} else { |
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return 1; |
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} |
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|
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} |
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|
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int mcrypt_is_ok_mode(int mode) |
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{ /* if this mode exists returns 0 */ |
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char *y = mcrypt_get_modes_name(mode); |
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|
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if (y != NULL) { |
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free(y); |
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return 0; |
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} else { |
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return 1; |
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} |
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|
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} |
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|
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|
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|
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|
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char *mcrypt_get_modes_name(int mode) |
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{ |
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char *ret = NULL; |
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|
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/* avoid prefix */ |
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MCRYPT_MLOOP(ret = strdup(p->name + sizeof("MCRYPT_") - 1)); |
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if (ret!=NULL) tolow( ret, strlen(ret)); |
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|
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return ret; |
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} |
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