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/* |
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* Copyright (C) 1998,1999 Nikos Mavroyanopoulos |
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* |
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* This library is free |
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* software; you can redistribute it and/or modify it under the terms of the |
| 6 |
* 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 |
| 13 |
* 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 |
| 16 |
* 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.c,v 1.8 1999/10/20 09:13:41 nmav Exp $ */ |
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|
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#ifndef LIBDEFS_H |
| 24 |
#define LIBDEFS_H |
| 25 |
#include <libdefs.h> |
| 26 |
#endif |
| 27 |
#include <bzero.h> |
| 28 |
#include <swap.h> |
| 29 |
|
| 30 |
#define MCRYPT_STRUCT_DEFINED |
| 31 |
#include <mcrypt_int.h> |
| 32 |
#include <blowfish.h> |
| 33 |
#include <3-way.h> |
| 34 |
#include <tripledes.h> |
| 35 |
#include <gost.h> |
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#include <des.h> |
| 37 |
#include <safer.h> |
| 38 |
#include <cast-128.h> |
| 39 |
#include <cast-256.h> |
| 40 |
#include <tean.h> |
| 41 |
#include <twofish.h> |
| 42 |
#include <xmemory.h> |
| 43 |
#include <rc2.h> |
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#include <enigma.h> |
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#include <saferplus.h> |
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#include <loki97.h> |
| 47 |
#include <rijndael.h> |
| 48 |
#include <serpent.h> |
| 49 |
#include <arcfour.h> |
| 50 |
|
| 51 |
MCRYPT init_mcrypt(const int mode, const int algorithm, void *key, |
| 52 |
int lenofkey) |
| 53 |
{ |
| 54 |
MCRYPT thread; |
| 55 |
|
| 56 |
if (lenofkey == 0) |
| 57 |
return MCRYPT_FAILED; /* error */ |
| 58 |
|
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thread = malloc(sizeof(struct MCRYPT_INT)); |
| 60 |
|
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if (mcrypt_get_key_size(algorithm) < lenofkey) |
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lenofkey = mcrypt_get_key_size(algorithm); |
| 63 |
|
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thread->algorithm_given = algorithm; |
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thread->mode_given = mode; |
| 66 |
thread->keyword_given = |
| 67 |
mxcalloc(1, mcrypt_get_key_size(algorithm)); |
| 68 |
|
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memmove(thread->keyword_given, key, lenofkey); |
| 70 |
|
| 71 |
|
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switch (algorithm) { |
| 73 |
|
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case MCRYPT_DES: |
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thread->akey = mxcalloc(1, sizeof(DES_KEY)); |
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_mcrypt_des_set_key((void *) thread->akey, |
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(void *) thread->keyword_given, lenofkey); |
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return thread; |
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|
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case MCRYPT_ENIGMA: |
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thread->akey = mxcalloc(1, sizeof(CRYPT_KEY)); |
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_mcrypt_enigma_set_key((void *) thread->akey, |
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(void *) thread->keyword_given, lenofkey); |
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return thread; |
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|
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case MCRYPT_SAFER_SK64: |
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thread->akey = |
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mxcalloc(1, 1 + |
| 89 |
SAFER_BLOCK_LEN * (1 + |
| 90 |
2 * SAFER_MAX_NOF_ROUNDS)); |
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|
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_mcrypt_Safer_Init_Module(); |
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_mcrypt_Safer_Expand_Userkey((void *) |
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thread->keyword_given, |
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(void *) |
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thread->keyword_given, |
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SAFER_SK64_DEFAULT_NOF_ROUNDS, |
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1, thread->akey); |
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/* 8 rounds and secure key schedule */ |
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return thread; |
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|
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case MCRYPT_CAST_128: |
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thread->akey = mxcalloc(1, sizeof(struct cast_key)); |
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_mcrypt_cast_setkey((void *) thread->akey, |
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(void *) thread->keyword_given, |
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lenofkey); |
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return thread; |
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|
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case MCRYPT_LOKI97: |
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thread->akey = mxcalloc(1, 96 * sizeof(word32)); |
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_mcrypt_loki97_set_key((void *) thread->akey, |
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(void *) thread->keyword_given, |
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lenofkey); |
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return thread; |
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|
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case MCRYPT_CAST_256: |
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thread->akey = mxcalloc(1, 96 * sizeof(word32)); |
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_mcrypt_cast256_set_key((void *) thread->akey, |
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(void *) thread->keyword_given, |
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lenofkey); |
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return thread; |
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|
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|
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case MCRYPT_RIJNDAEL_128: |
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thread->akey = mxcalloc(1, sizeof(RI)); |
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_mcrypt_rijndael_gentables(); |
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_mcrypt_rijndael_set_key((void *) thread->akey, 4, |
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lenofkey / 4, |
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(void *) thread->keyword_given); |
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return thread; |
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|
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case MCRYPT_SERPENT: |
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thread->akey = mxcalloc(1, sizeof(SERPENT_KEY)); |
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_mcrypt_serpent_set_key((void *) thread->akey, |
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(void *) thread->keyword_given, |
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lenofkey); |
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return thread; |
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|
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case MCRYPT_RC2: |
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thread->akey = mxcalloc(1, 64 * sizeof(word16)); |
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_mcrypt_rc2_keyschedule((void *) thread->akey, |
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(void *) thread->keyword_given, |
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lenofkey); |
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return thread; |
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|
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case MCRYPT_ARCFOUR: |
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thread->akey = mxcalloc(1, sizeof(arcfour_key)); |
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_mcrypt_arcfour_prepare_key((void *) thread->keyword_given, |
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lenofkey, |
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(void *) thread->akey); |
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return thread; |
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|
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case MCRYPT_SAFER_SK128: |
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_mcrypt_Safer_Init_Module(); |
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thread->akey = |
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mxcalloc(1, 1 + |
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SAFER_BLOCK_LEN * (1 + |
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2 * SAFER_MAX_NOF_ROUNDS)); |
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|
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_mcrypt_Safer_Expand_Userkey((void *) |
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thread->keyword_given, |
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(void *) |
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&(thread->keyword_given)[8], |
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SAFER_SK128_DEFAULT_NOF_ROUNDS, |
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1, thread->akey); |
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|
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/* 8 rounds and secure key schedule */ |
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|
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return thread; |
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|
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case MCRYPT_TRIPLEDES: |
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thread->akey = mxcalloc(1, sizeof(TRIPLEDES_KEY)); |
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_mcrypt_3des_set_key((void *) thread->akey, |
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(void *) thread->keyword_given, mcrypt_get_key_size(algorithm)); |
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|
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return thread; |
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|
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case MCRYPT_SAFERPLUS: |
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thread->akey = mxcalloc(1, sizeof(SPI)); |
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_mcrypt_saferplus_set_key((void *) thread->akey, |
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(void *) thread->keyword_given, |
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lenofkey); |
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return thread; |
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|
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case MCRYPT_BLOWFISH: |
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thread->akey = mxcalloc(1, sizeof(blf_ctx)); |
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if (lenofkey < 2) { |
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_mcrypt_blf_key((void *) thread->akey, |
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(void *) thread->keyword_given, 2); |
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} else { |
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_mcrypt_blf_key((void *) thread->akey, |
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(void *) thread->keyword_given, |
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lenofkey); |
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} |
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return thread; |
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|
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case MCRYPT_TWOFISH: |
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thread->akey = mxcalloc(1, sizeof(TWI)); |
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_mcrypt_twofish_set_key((void *) thread->akey, |
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(void *) thread->keyword_given, |
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lenofkey); |
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return thread; |
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|
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case MCRYPT_GOST: |
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thread->akey = mxcalloc(1, 8*sizeof(word32)); |
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_mcrypt_gost_set_key((void *) thread->akey, (void *) thread->keyword_given, lenofkey); |
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|
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return thread; |
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|
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case MCRYPT_THREEWAY: |
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case MCRYPT_XTEA: |
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return thread; |
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|
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default: |
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return MCRYPT_FAILED; |
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} |
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|
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} |
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|
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|
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/* plaintext should be in block's size */ |
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int mcrypt(MCRYPT thread, void *plaintext) |
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{ |
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|
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switch (thread->algorithm_given) { |
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|
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case MCRYPT_SAFER_SK64: |
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case MCRYPT_SAFER_SK128: |
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_mcrypt_Safer_Encrypt_Block(plaintext, thread->akey); |
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return 0; |
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|
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case MCRYPT_SAFERPLUS: |
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_mcrypt_saferplus_encrypt((void *) thread->akey, |
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plaintext); |
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return 0; |
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|
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case MCRYPT_CAST_128: |
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_mcrypt_cast_encrypt((void *) thread->akey, |
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(void *) plaintext); |
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return 0; |
| 241 |
|
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case MCRYPT_LOKI97: |
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_mcrypt_loki97_encrypt((void *) thread->akey, |
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(void *) plaintext); |
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return 0; |
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|
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case MCRYPT_CAST_256: |
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_mcrypt_cast256_encrypt((void *) thread->akey, |
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(void *) plaintext); |
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return 0; |
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|
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case MCRYPT_RC2: |
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_mcrypt_rc2_encrypt((void *) thread->akey, |
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(void *) plaintext); |
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return 0; |
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|
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case MCRYPT_RIJNDAEL_128: |
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_mcrypt_rijndael_encrypt((void *) thread->akey, |
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(void *) plaintext); |
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return 0; |
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|
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case MCRYPT_SERPENT: |
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_mcrypt_serpent_encrypt((void *) thread->akey, |
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(void *) plaintext); |
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return 0; |
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|
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case MCRYPT_DES: |
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_mcrypt_des_encrypt((void *) thread->akey, plaintext); |
| 269 |
return 0; |
| 270 |
|
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case MCRYPT_TRIPLEDES: |
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_mcrypt_3des_encrypt((void *) thread->akey, plaintext); |
| 273 |
return 0; |
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|
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case MCRYPT_BLOWFISH: |
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_mcrypt_enblf((void *) thread->akey, plaintext); |
| 277 |
return 0; |
| 278 |
|
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case MCRYPT_TWOFISH: |
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_mcrypt_twofish_encrypt((void *) thread->akey, plaintext); |
| 281 |
return 0; |
| 282 |
|
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case MCRYPT_GOST: |
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_mcrypt_gost_encrypt((void *) thread->akey, plaintext); |
| 285 |
return 0; |
| 286 |
|
| 287 |
case MCRYPT_XTEA: |
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_mcrypt_cl_enc_block((void *) thread->keyword_given, |
| 289 |
plaintext); |
| 290 |
return 0; |
| 291 |
|
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case MCRYPT_THREEWAY: |
| 293 |
_mcrypt_en3way(plaintext, (void *) thread->keyword_given); |
| 294 |
return 0; |
| 295 |
|
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default: |
| 297 |
return 0; |
| 298 |
} |
| 299 |
|
| 300 |
} |
| 301 |
|
| 302 |
|
| 303 |
/* plaintext should be in block's size */ |
| 304 |
int mdecrypt(MCRYPT thread, void *plaintext) |
| 305 |
{ |
| 306 |
switch (thread->algorithm_given) { |
| 307 |
|
| 308 |
case MCRYPT_SAFER_SK64: |
| 309 |
case MCRYPT_SAFER_SK128: |
| 310 |
_mcrypt_Safer_Decrypt_Block(plaintext, |
| 311 |
(void *) thread->akey); |
| 312 |
return 0; |
| 313 |
|
| 314 |
case MCRYPT_SAFERPLUS: |
| 315 |
_mcrypt_saferplus_decrypt((void *) thread->akey, |
| 316 |
plaintext); |
| 317 |
return 0; |
| 318 |
|
| 319 |
case MCRYPT_CAST_128: |
| 320 |
_mcrypt_cast_decrypt((void *) thread->akey, |
| 321 |
(void *) plaintext); |
| 322 |
return 0; |
| 323 |
|
| 324 |
case MCRYPT_LOKI97: |
| 325 |
_mcrypt_loki97_decrypt((void *) thread->akey, |
| 326 |
(void *) plaintext); |
| 327 |
return 0; |
| 328 |
|
| 329 |
case MCRYPT_CAST_256: |
| 330 |
_mcrypt_cast256_decrypt((void *) thread->akey, |
| 331 |
(void *) plaintext); |
| 332 |
return 0; |
| 333 |
|
| 334 |
case MCRYPT_RC2: |
| 335 |
_mcrypt_rc2_decrypt((void *) thread->akey, |
| 336 |
(void *) plaintext); |
| 337 |
return 0; |
| 338 |
|
| 339 |
case MCRYPT_RIJNDAEL_128: |
| 340 |
_mcrypt_rijndael_decrypt((void *) thread->akey, |
| 341 |
(void *) plaintext); |
| 342 |
return 0; |
| 343 |
|
| 344 |
case MCRYPT_SERPENT: |
| 345 |
_mcrypt_serpent_decrypt((void *) thread->akey, |
| 346 |
(void *) plaintext); |
| 347 |
return 0; |
| 348 |
|
| 349 |
case MCRYPT_DES: |
| 350 |
_mcrypt_des_decrypt( (void*) thread->akey, plaintext); |
| 351 |
return 0; |
| 352 |
|
| 353 |
case MCRYPT_XTEA: |
| 354 |
_mcrypt_cl_dec_block((void *) thread->keyword_given, |
| 355 |
plaintext); |
| 356 |
return 0; |
| 357 |
|
| 358 |
case MCRYPT_TRIPLEDES: |
| 359 |
_mcrypt_3des_decrypt((void *) thread->akey, plaintext); |
| 360 |
return 0; |
| 361 |
|
| 362 |
case MCRYPT_TWOFISH: |
| 363 |
_mcrypt_twofish_decrypt((void *) thread->akey, plaintext); |
| 364 |
return 0; |
| 365 |
|
| 366 |
case MCRYPT_BLOWFISH: |
| 367 |
_mcrypt_deblf((void *) thread->akey, plaintext); |
| 368 |
return 0; |
| 369 |
|
| 370 |
case MCRYPT_GOST: |
| 371 |
_mcrypt_gost_decrypt( (void *) thread->akey, plaintext); |
| 372 |
return 0; |
| 373 |
|
| 374 |
case MCRYPT_THREEWAY: |
| 375 |
_mcrypt_de3way(plaintext, (void *) thread->keyword_given); |
| 376 |
return 0; |
| 377 |
|
| 378 |
default: |
| 379 |
return 0; |
| 380 |
} |
| 381 |
} |
| 382 |
|
| 383 |
|
| 384 |
int end_mcrypt(MCRYPT td) |
| 385 |
{ |
| 386 |
|
| 387 |
if (td==MCRYPT_FAILED) return -1; |
| 388 |
|
| 389 |
mxfree(td->keyword_given, |
| 390 |
mcrypt_get_key_size(td->algorithm_given)); |
| 391 |
|
| 392 |
switch (td->algorithm_given) { |
| 393 |
|
| 394 |
case MCRYPT_RIJNDAEL_128: |
| 395 |
mxfree(td->akey, sizeof(RI)); |
| 396 |
break; |
| 397 |
|
| 398 |
case MCRYPT_SERPENT: |
| 399 |
mxfree(td->akey, sizeof(SERPENT_KEY)); |
| 400 |
break; |
| 401 |
|
| 402 |
|
| 403 |
case MCRYPT_DES: |
| 404 |
mxfree(td->akey, sizeof(DES_KEY)); |
| 405 |
break; |
| 406 |
|
| 407 |
case MCRYPT_TRIPLEDES: |
| 408 |
mxfree(td->akey, sizeof(TRIPLEDES_KEY)); |
| 409 |
break; |
| 410 |
|
| 411 |
case MCRYPT_RC2: |
| 412 |
mxfree(td->akey, 64 * sizeof(word16)); |
| 413 |
break; |
| 414 |
|
| 415 |
case MCRYPT_ARCFOUR: |
| 416 |
mxfree(td->akey, sizeof(arcfour_key)); |
| 417 |
break; |
| 418 |
|
| 419 |
case MCRYPT_ENIGMA: |
| 420 |
mxfree(td->akey, sizeof(CRYPT_KEY)); |
| 421 |
break; |
| 422 |
|
| 423 |
case MCRYPT_TWOFISH: |
| 424 |
mxfree(td->akey, sizeof(TWI)); |
| 425 |
break; |
| 426 |
|
| 427 |
case MCRYPT_BLOWFISH: |
| 428 |
mxfree(td->akey, sizeof(blf_ctx)); |
| 429 |
break; |
| 430 |
|
| 431 |
case MCRYPT_GOST: |
| 432 |
mxfree(td->akey, 8*sizeof(word32)); |
| 433 |
break; |
| 434 |
|
| 435 |
case MCRYPT_XTEA: |
| 436 |
case MCRYPT_THREEWAY: |
| 437 |
break; |
| 438 |
|
| 439 |
case MCRYPT_CAST_128: |
| 440 |
mxfree(td->akey, sizeof(struct cast_key)); |
| 441 |
break; |
| 442 |
|
| 443 |
case MCRYPT_LOKI97: |
| 444 |
mxfree(td->akey, 96 * sizeof(word32)); |
| 445 |
break; |
| 446 |
|
| 447 |
case MCRYPT_CAST_256: |
| 448 |
mxfree(td->akey, 96 * sizeof(word32)); |
| 449 |
break; |
| 450 |
|
| 451 |
case MCRYPT_SAFER_SK64: |
| 452 |
case MCRYPT_SAFER_SK128: |
| 453 |
mxfree(td->akey, |
| 454 |
1 + SAFER_BLOCK_LEN * (1 + |
| 455 |
2 * SAFER_MAX_NOF_ROUNDS)); |
| 456 |
break; |
| 457 |
|
| 458 |
default: |
| 459 |
return 0; |
| 460 |
} |
| 461 |
|
| 462 |
free(td); |
| 463 |
return 0; |
| 464 |
} |
| 465 |
|
| 466 |
/* ECB MODE */ |
| 467 |
|
| 468 |
MCRYPT init_mcrypt_ecb(const int algorithm, void *key, int lenofkey) |
| 469 |
{ |
| 470 |
MCRYPT x; |
| 471 |
|
| 472 |
x = init_mcrypt(MCRYPT_ECB, algorithm, key, lenofkey); |
| 473 |
|
| 474 |
return x; |
| 475 |
|
| 476 |
} |
| 477 |
|
| 478 |
|
| 479 |
|
| 480 |
|
| 481 |
int mcrypt_ecb(MCRYPT td, void *plaintext, int len) |
| 482 |
{ |
| 483 |
int j, blocksize; |
| 484 |
char *plain = plaintext; |
| 485 |
|
| 486 |
blocksize = mcrypt_get_block_size(td->algorithm_given); |
| 487 |
for (j = 0; j < len / blocksize; j++) { |
| 488 |
|
| 489 |
mcrypt(td, &plain[j * blocksize]); |
| 490 |
|
| 491 |
} |
| 492 |
return 0; |
| 493 |
} |
| 494 |
|
| 495 |
|
| 496 |
|
| 497 |
int mdecrypt_ecb(MCRYPT td, void *ciphertext, int len) |
| 498 |
{ |
| 499 |
int j, blocksize = mcrypt_get_block_size(td->algorithm_given); |
| 500 |
char *cipher = ciphertext; |
| 501 |
|
| 502 |
for (j = 0; j < len / blocksize; j++) { |
| 503 |
|
| 504 |
mdecrypt(td, &cipher[j * blocksize]); |
| 505 |
|
| 506 |
} |
| 507 |
|
| 508 |
return 0; |
| 509 |
} |
| 510 |
|
| 511 |
|
| 512 |
|
| 513 |
/* STREAM MODE */ |
| 514 |
MCRYPT init_mcrypt_stream(const int algorithm, void *key, int lenofkey) |
| 515 |
{ |
| 516 |
MCRYPT x; |
| 517 |
|
| 518 |
x = init_mcrypt(MCRYPT_STREAM, algorithm, key, lenofkey); |
| 519 |
|
| 520 |
return x; |
| 521 |
|
| 522 |
} |
| 523 |
|
| 524 |
|
| 525 |
|
| 526 |
|
| 527 |
int mcrypt_stream(MCRYPT td, void *plaintext, int len) |
| 528 |
{ |
| 529 |
switch (td->algorithm_given) { |
| 530 |
|
| 531 |
|
| 532 |
case MCRYPT_ENIGMA: |
| 533 |
_mcrypt_enigma_encrypt((void *) td->akey, plaintext, len); |
| 534 |
return 0; |
| 535 |
|
| 536 |
case MCRYPT_ARCFOUR: |
| 537 |
_mcrypt_arcfour((void *) plaintext, len, |
| 538 |
(void *) td->akey); |
| 539 |
return 0; |
| 540 |
default: |
| 541 |
return -1; |
| 542 |
} |
| 543 |
|
| 544 |
} |
| 545 |
|
| 546 |
|
| 547 |
|
| 548 |
int mdecrypt_stream(MCRYPT td, void *ciphertext, int len) |
| 549 |
{ |
| 550 |
switch (td->algorithm_given) { |
| 551 |
|
| 552 |
|
| 553 |
case MCRYPT_ENIGMA: |
| 554 |
_mcrypt_enigma_decrypt((void *) td->akey, ciphertext, len); |
| 555 |
return 0; |
| 556 |
|
| 557 |
case MCRYPT_ARCFOUR: |
| 558 |
_mcrypt_arcfour((void *) ciphertext, len, |
| 559 |
(void *) td->akey); |
| 560 |
return 0; |
| 561 |
default: |
| 562 |
return -1; |
| 563 |
} |
| 564 |
} |
| 565 |
|
| 566 |
|
| 567 |
|
| 568 |
|
| 569 |
/* CBC MODE */ |
| 570 |
|
| 571 |
int end_mcrypt_cbc(MCRYPT td) |
| 572 |
{ |
| 573 |
|
| 574 |
mxfree(td->previous_ciphertext, |
| 575 |
mcrypt_get_block_size(td->algorithm_given)); |
| 576 |
mxfree(td->previous_cipher, |
| 577 |
mcrypt_get_block_size(td->algorithm_given)); |
| 578 |
mxfree(td->previous_plaintext, |
| 579 |
mcrypt_get_block_size(td->algorithm_given)); |
| 580 |
return end_mcrypt(td); |
| 581 |
|
| 582 |
} |
| 583 |
|
| 584 |
|
| 585 |
MCRYPT init_mcrypt_cbc(const int algorithm, void *key, int lenofkey) |
| 586 |
{ |
| 587 |
|
| 588 |
MCRYPT x; |
| 589 |
|
| 590 |
x = init_mcrypt(MCRYPT_CBC, algorithm, key, lenofkey); |
| 591 |
|
| 592 |
/* For cbc */ |
| 593 |
if (x != MCRYPT_FAILED) { |
| 594 |
x->previous_ciphertext = |
| 595 |
mxcalloc(1, mcrypt_get_block_size(algorithm)); |
| 596 |
x->previous_cipher = |
| 597 |
mxmalloc(mcrypt_get_block_size(algorithm)); |
| 598 |
x->previous_plaintext = |
| 599 |
mxcalloc(1, mcrypt_get_block_size(algorithm)); |
| 600 |
} |
| 601 |
/* End cbc */ |
| 602 |
|
| 603 |
return x; |
| 604 |
|
| 605 |
} |
| 606 |
|
| 607 |
MCRYPT init_mcrypt_cbc_iv(const int algorithm, void *key, int lenofkey, |
| 608 |
void *IV) |
| 609 |
{ |
| 610 |
|
| 611 |
MCRYPT x; |
| 612 |
|
| 613 |
x = init_mcrypt(MCRYPT_CBC, algorithm, key, lenofkey); |
| 614 |
|
| 615 |
if (x != MCRYPT_FAILED) { |
| 616 |
x->previous_ciphertext = |
| 617 |
mxcalloc(1, mcrypt_get_block_size(algorithm)); |
| 618 |
x->previous_cipher = |
| 619 |
mxmalloc(mcrypt_get_block_size(algorithm)); |
| 620 |
x->previous_plaintext = |
| 621 |
mxcalloc(1, mcrypt_get_block_size(algorithm)); |
| 622 |
|
| 623 |
memmove(x->previous_ciphertext, IV, |
| 624 |
mcrypt_get_block_size(algorithm)); |
| 625 |
memmove(x->previous_plaintext, IV, |
| 626 |
mcrypt_get_block_size(algorithm)); |
| 627 |
/* End cbc */ |
| 628 |
} |
| 629 |
|
| 630 |
return x; |
| 631 |
|
| 632 |
} |
| 633 |
|
| 634 |
|
| 635 |
int mcrypt_cbc(MCRYPT td, void *plaintext, int len) |
| 636 |
{ |
| 637 |
word32 *fplain = plaintext; |
| 638 |
word32 *plain; |
| 639 |
int i, j, blocksize = mcrypt_get_block_size(td->algorithm_given); |
| 640 |
|
| 641 |
for (j = 0; j < len / blocksize; j++) { |
| 642 |
|
| 643 |
plain = &fplain[j * blocksize / sizeof(word32)]; |
| 644 |
|
| 645 |
for (i = 0; i < blocksize / sizeof(word32); i++) { |
| 646 |
plain[i] ^= td->previous_ciphertext[i]; |
| 647 |
} |
| 648 |
|
| 649 |
mcrypt(td, plain); |
| 650 |
|
| 651 |
|
| 652 |
/* Copy the ciphertext to prev_ciphertext */ |
| 653 |
memmove(td->previous_ciphertext, plain, blocksize); |
| 654 |
} |
| 655 |
|
| 656 |
return 0; |
| 657 |
} |
| 658 |
|
| 659 |
|
| 660 |
|
| 661 |
int mdecrypt_cbc(MCRYPT td, void *ciphertext, int len) |
| 662 |
{ |
| 663 |
word32 *cipher; |
| 664 |
word32 *fcipher = ciphertext; |
| 665 |
int i, j, blocksize = mcrypt_get_block_size(td->algorithm_given); |
| 666 |
|
| 667 |
for (j = 0; j < len / blocksize; j++) { |
| 668 |
|
| 669 |
cipher = &fcipher[j * blocksize / sizeof(word32)]; |
| 670 |
memmove(td->previous_cipher, cipher, blocksize); |
| 671 |
|
| 672 |
mdecrypt(td, cipher); |
| 673 |
for (i = 0; i < blocksize / sizeof(word32); i++) { |
| 674 |
cipher[i] ^= td->previous_plaintext[i]; |
| 675 |
} |
| 676 |
|
| 677 |
/* Copy the ciphertext to prev_cipher */ |
| 678 |
memmove(td->previous_plaintext, td->previous_cipher, |
| 679 |
blocksize); |
| 680 |
|
| 681 |
} |
| 682 |
|
| 683 |
return 0; |
| 684 |
} |
| 685 |
|
| 686 |
|
| 687 |
|
| 688 |
/* CFB MODE */ |
| 689 |
|
| 690 |
int end_mcrypt_cfb(MCRYPT td) |
| 691 |
{ |
| 692 |
|
| 693 |
mxfree(td->s_register, mcrypt_get_block_size(td->algorithm_given)); |
| 694 |
mxfree(td->enc_s_register, |
| 695 |
mcrypt_get_block_size(td->algorithm_given)); |
| 696 |
mxfree(td->enc_sd_register, |
| 697 |
mcrypt_get_block_size(td->algorithm_given)); |
| 698 |
mxfree(td->sd_register, |
| 699 |
mcrypt_get_block_size(td->algorithm_given)); |
| 700 |
|
| 701 |
return end_mcrypt(td); |
| 702 |
|
| 703 |
} |
| 704 |
|
| 705 |
|
| 706 |
MCRYPT init_mcrypt_cfb(const int algorithm, void *key, int lenofkey, |
| 707 |
void *IV) |
| 708 |
{ |
| 709 |
MCRYPT x; |
| 710 |
|
| 711 |
x = init_mcrypt(MCRYPT_CFB, algorithm, key, lenofkey); |
| 712 |
|
| 713 |
if (x != MCRYPT_FAILED) { |
| 714 |
/* For cfb */ |
| 715 |
x->s_register = mxmalloc(mcrypt_get_block_size(algorithm)); |
| 716 |
x->sd_register = |
| 717 |
mxmalloc(mcrypt_get_block_size(algorithm)); |
| 718 |
x->enc_s_register = |
| 719 |
mxmalloc(mcrypt_get_block_size(algorithm)); |
| 720 |
x->enc_sd_register = |
| 721 |
mxmalloc(mcrypt_get_block_size(algorithm)); |
| 722 |
memmove(x->sd_register, IV, |
| 723 |
mcrypt_get_block_size(algorithm)); |
| 724 |
memmove(x->s_register, IV, |
| 725 |
mcrypt_get_block_size(algorithm)); |
| 726 |
|
| 727 |
/* End cfb */ |
| 728 |
} |
| 729 |
|
| 730 |
return x; |
| 731 |
} |
| 732 |
|
| 733 |
int mcrypt_cfb(MCRYPT td, void *plaintext, int len) |
| 734 |
{ /* plaintext is 1 byte (8bit cfb) */ |
| 735 |
char *plain = plaintext; |
| 736 |
int i, j, blocksize = mcrypt_get_block_size(td->algorithm_given);; |
| 737 |
|
| 738 |
for (j = 0; j < len; j++) { |
| 739 |
|
| 740 |
memmove(td->enc_s_register, td->s_register, blocksize); |
| 741 |
|
| 742 |
mcrypt(td, td->enc_s_register); |
| 743 |
|
| 744 |
plain[j] ^= td->enc_s_register[0]; |
| 745 |
|
| 746 |
/* Shift the register */ |
| 747 |
for (i = 0; i < (blocksize - 1); i++) |
| 748 |
td->s_register[i] = td->s_register[i + 1]; |
| 749 |
|
| 750 |
td->s_register[blocksize - 1] = plain[j]; |
| 751 |
|
| 752 |
|
| 753 |
} |
| 754 |
|
| 755 |
return 0; |
| 756 |
|
| 757 |
} |
| 758 |
|
| 759 |
|
| 760 |
int mdecrypt_cfb(MCRYPT td, void *plaintext, int len) |
| 761 |
{ /* plaintext is 1 byte (8bit cfb) */ |
| 762 |
char *plain = plaintext; |
| 763 |
int i, j, blocksize = mcrypt_get_block_size(td->algorithm_given);; |
| 764 |
|
| 765 |
for (j = 0; j < len; j++) { |
| 766 |
|
| 767 |
memmove(td->enc_sd_register, td->sd_register, blocksize); |
| 768 |
|
| 769 |
mcrypt(td, td->enc_sd_register); |
| 770 |
|
| 771 |
/* Shift the register */ |
| 772 |
for (i = 0; i < (blocksize - 1); i++) |
| 773 |
td->sd_register[i] = td->sd_register[i + 1]; |
| 774 |
|
| 775 |
td->sd_register[blocksize - 1] = plain[j]; |
| 776 |
|
| 777 |
plain[j] ^= td->enc_sd_register[0]; |
| 778 |
|
| 779 |
} |
| 780 |
|
| 781 |
return 0; |
| 782 |
} |
| 783 |
|
| 784 |
|
| 785 |
/* OFB MODE */ |
| 786 |
|
| 787 |
int end_mcrypt_ofb(MCRYPT td) |
| 788 |
{ |
| 789 |
|
| 790 |
mxfree(td->s_register, mcrypt_get_block_size(td->algorithm_given)); |
| 791 |
mxfree(td->enc_s_register, |
| 792 |
mcrypt_get_block_size(td->algorithm_given)); |
| 793 |
mxfree(td->enc_sd_register, |
| 794 |
mcrypt_get_block_size(td->algorithm_given)); |
| 795 |
mxfree(td->sd_register, |
| 796 |
mcrypt_get_block_size(td->algorithm_given)); |
| 797 |
|
| 798 |
return end_mcrypt(td); |
| 799 |
|
| 800 |
} |
| 801 |
|
| 802 |
|
| 803 |
MCRYPT init_mcrypt_ofb(const int algorithm, void *key, int lenofkey, |
| 804 |
void *IV) |
| 805 |
{ |
| 806 |
MCRYPT x; |
| 807 |
|
| 808 |
x = init_mcrypt(MCRYPT_OFB, algorithm, key, lenofkey); |
| 809 |
|
| 810 |
|
| 811 |
if (x != MCRYPT_FAILED) { |
| 812 |
/* For ofb */ |
| 813 |
x->s_register = mxmalloc(mcrypt_get_block_size(algorithm)); |
| 814 |
x->sd_register = |
| 815 |
mxmalloc(mcrypt_get_block_size(algorithm)); |
| 816 |
x->enc_s_register = |
| 817 |
mxmalloc(mcrypt_get_block_size(algorithm)); |
| 818 |
x->enc_sd_register = |
| 819 |
mxmalloc(mcrypt_get_block_size(algorithm)); |
| 820 |
memmove(x->sd_register, IV, |
| 821 |
mcrypt_get_block_size(algorithm)); |
| 822 |
memmove(x->s_register, IV, |
| 823 |
mcrypt_get_block_size(algorithm)); |
| 824 |
/* End ofb */ |
| 825 |
} |
| 826 |
|
| 827 |
|
| 828 |
return x; |
| 829 |
} |
| 830 |
|
| 831 |
int mcrypt_ofb(MCRYPT td, void *plaintext, int len) |
| 832 |
{ /* plaintext is 1 byte (8bit cfb) */ |
| 833 |
char *plain = plaintext; |
| 834 |
int i, j, blocksize = mcrypt_get_block_size(td->algorithm_given);; |
| 835 |
|
| 836 |
for (j = 0; j < len; j++) { |
| 837 |
|
| 838 |
memmove(td->enc_s_register, td->s_register, blocksize); |
| 839 |
|
| 840 |
mcrypt(td, td->enc_s_register); |
| 841 |
|
| 842 |
plain[j] ^= td->enc_s_register[0]; |
| 843 |
|
| 844 |
/* Shift the register */ |
| 845 |
for (i = 0; i < (blocksize - 1); i++) |
| 846 |
td->s_register[i] = td->s_register[i + 1]; |
| 847 |
|
| 848 |
td->s_register[blocksize - 1] = td->enc_s_register[0]; |
| 849 |
|
| 850 |
|
| 851 |
} |
| 852 |
|
| 853 |
return 0; |
| 854 |
|
| 855 |
} |
| 856 |
|
| 857 |
|
| 858 |
int mdecrypt_ofb(MCRYPT td, void *plaintext, int len) |
| 859 |
{ /* plaintext is 1 byte (8bit ofb) */ |
| 860 |
char *plain = plaintext; |
| 861 |
int i, j, blocksize = mcrypt_get_block_size(td->algorithm_given);; |
| 862 |
|
| 863 |
for (j = 0; j < len; j++) { |
| 864 |
|
| 865 |
memmove(td->enc_sd_register, td->sd_register, blocksize); |
| 866 |
|
| 867 |
mcrypt(td, td->enc_sd_register); |
| 868 |
|
| 869 |
/* Shift the register */ |
| 870 |
for (i = 0; i < (blocksize - 1); i++) |
| 871 |
td->sd_register[i] = td->sd_register[i + 1]; |
| 872 |
|
| 873 |
td->sd_register[blocksize - 1] = td->enc_sd_register[0]; |
| 874 |
|
| 875 |
plain[j] ^= td->enc_sd_register[0]; |
| 876 |
|
| 877 |
} |
| 878 |
|
| 879 |
return 0; |
| 880 |
} |
| 881 |
|
| 882 |
|
| 883 |
|
| 884 |
/* n-bit ofb */ |
| 885 |
|
| 886 |
int end_mcrypt_nofb(MCRYPT td) |
| 887 |
{ |
| 888 |
|
| 889 |
mxfree(td->s_register, mcrypt_get_block_size(td->algorithm_given)); |
| 890 |
mxfree(td->enc_s_register, |
| 891 |
mcrypt_get_block_size(td->algorithm_given)); |
| 892 |
mxfree(td->enc_sd_register, |
| 893 |
mcrypt_get_block_size(td->algorithm_given)); |
| 894 |
mxfree(td->sd_register, |
| 895 |
mcrypt_get_block_size(td->algorithm_given)); |
| 896 |
|
| 897 |
return end_mcrypt(td); |
| 898 |
|
| 899 |
} |
| 900 |
|
| 901 |
|
| 902 |
MCRYPT init_mcrypt_nofb(const int algorithm, void *key, int lenofkey, |
| 903 |
void *IV) |
| 904 |
{ |
| 905 |
MCRYPT x; |
| 906 |
|
| 907 |
x = init_mcrypt(MCRYPT_nOFB, algorithm, key, lenofkey); |
| 908 |
|
| 909 |
if (x != MCRYPT_FAILED) { |
| 910 |
/* For nofb */ |
| 911 |
x->s_register = mxmalloc(mcrypt_get_block_size(algorithm)); |
| 912 |
x->sd_register = |
| 913 |
mxmalloc(mcrypt_get_block_size(algorithm)); |
| 914 |
x->enc_s_register = |
| 915 |
mxmalloc(mcrypt_get_block_size(algorithm)); |
| 916 |
x->enc_sd_register = |
| 917 |
mxmalloc(mcrypt_get_block_size(algorithm)); |
| 918 |
memmove(x->sd_register, IV, |
| 919 |
mcrypt_get_block_size(algorithm)); |
| 920 |
memmove(x->s_register, IV, |
| 921 |
mcrypt_get_block_size(algorithm)); |
| 922 |
/* End nofb */ |
| 923 |
} |
| 924 |
|
| 925 |
return x; |
| 926 |
} |
| 927 |
|
| 928 |
int mcrypt_nofb(MCRYPT td, void *plaintext, int len) |
| 929 |
{ /* plaintext is n*blocksize bytes (nbit ofb) */ |
| 930 |
word32 *plain, *fplain = plaintext; |
| 931 |
int i, j, blocksize = mcrypt_get_block_size(td->algorithm_given); |
| 932 |
|
| 933 |
for (j = 0; j < len / blocksize; j++) { |
| 934 |
plain = &fplain[j * blocksize / sizeof(word32)]; |
| 935 |
memmove(td->enc_s_register, td->s_register, blocksize); |
| 936 |
mcrypt(td, td->enc_s_register); |
| 937 |
|
| 938 |
for (i = 0; i < blocksize / sizeof(word32); i++) { |
| 939 |
plain[i] ^= |
| 940 |
((word32 *) & |
| 941 |
td->enc_s_register[0 + |
| 942 |
i * sizeof(word32)])[0]; |
| 943 |
} |
| 944 |
/* Put the new register */ |
| 945 |
memmove(td->s_register, td->enc_s_register, blocksize); |
| 946 |
} |
| 947 |
return 0; |
| 948 |
} |
| 949 |
|
| 950 |
|
| 951 |
int mdecrypt_nofb(MCRYPT td, void *plaintext, int len) |
| 952 |
{ /* plaintext is n bytes (nbit ofb) */ |
| 953 |
word32 *plain, *fplain = plaintext; |
| 954 |
int i, j, blocksize = mcrypt_get_block_size(td->algorithm_given); |
| 955 |
|
| 956 |
for (j = 0; j < len / blocksize; j++) { |
| 957 |
plain = &fplain[j * blocksize / sizeof(word32)]; |
| 958 |
memmove(td->enc_sd_register, td->sd_register, blocksize); |
| 959 |
mcrypt(td, td->enc_sd_register); |
| 960 |
|
| 961 |
/* Shift the register */ |
| 962 |
memmove(td->sd_register, td->enc_sd_register, blocksize); |
| 963 |
|
| 964 |
for (i = 0; i < blocksize / sizeof(word32); i++) { |
| 965 |
plain[i] ^= |
| 966 |
((word32 *) & |
| 967 |
td->enc_sd_register[0 + |
| 968 |
i * sizeof(word32)])[0]; |
| 969 |
} |
| 970 |
} |
| 971 |
|
| 972 |
return 0; |
| 973 |
} |
| 974 |
|
| 975 |
|
| 976 |
|
| 977 |
/* Generic -High level functions */ |
| 978 |
|
| 979 |
MCRYPT mcrypt_generic_init(const int mode, const int algorithm, void *key, |
| 980 |
int lenofkey, void *IV) |
| 981 |
{ |
| 982 |
if (mcrypt_is_block_algorithm(algorithm) != 0) { |
| 983 |
switch (mode) { |
| 984 |
case MCRYPT_CBC: |
| 985 |
if (IV == NULL) { |
| 986 |
return init_mcrypt_cbc(algorithm, key, |
| 987 |
lenofkey); |
| 988 |
} else { |
| 989 |
return init_mcrypt_cbc_iv(algorithm, key, |
| 990 |
lenofkey, IV); |
| 991 |
} |
| 992 |
|
| 993 |
case MCRYPT_ECB: |
| 994 |
return init_mcrypt_ecb(algorithm, key, lenofkey); |
| 995 |
case MCRYPT_CFB: |
| 996 |
return init_mcrypt_cfb(algorithm, key, lenofkey, |
| 997 |
IV); |
| 998 |
case MCRYPT_OFB: |
| 999 |
return init_mcrypt_ofb(algorithm, key, lenofkey, |
| 1000 |
IV); |
| 1001 |
case MCRYPT_nOFB: |
| 1002 |
return init_mcrypt_nofb(algorithm, key, lenofkey, |
| 1003 |
IV); |
| 1004 |
default: |
| 1005 |
return MCRYPT_FAILED; |
| 1006 |
} |
| 1007 |
} else { |
| 1008 |
if (mode == MCRYPT_STREAM) { |
| 1009 |
return init_mcrypt_stream(algorithm, key, |
| 1010 |
lenofkey); |
| 1011 |
} else { |
| 1012 |
return MCRYPT_FAILED; |
| 1013 |
} |
| 1014 |
} |
| 1015 |
|
| 1016 |
|
| 1017 |
} |
| 1018 |
|
| 1019 |
int mcrypt_generic(MCRYPT td, void *plaintext, int len) |
| 1020 |
{ |
| 1021 |
|
| 1022 |
switch (td->mode_given) { |
| 1023 |
case MCRYPT_CBC: |
| 1024 |
return mcrypt_cbc(td, plaintext, len); |
| 1025 |
case MCRYPT_ECB: |
| 1026 |
return mcrypt_ecb(td, plaintext, len); |
| 1027 |
case MCRYPT_CFB: |
| 1028 |
return mcrypt_cfb(td, plaintext, len); |
| 1029 |
case MCRYPT_OFB: |
| 1030 |
return mcrypt_ofb(td, plaintext, len); |
| 1031 |
case MCRYPT_nOFB: |
| 1032 |
return mcrypt_nofb(td, plaintext, len); |
| 1033 |
case MCRYPT_STREAM: |
| 1034 |
return mcrypt_stream(td, plaintext, len); |
| 1035 |
|
| 1036 |
default: |
| 1037 |
return -1; |
| 1038 |
} |
| 1039 |
|
| 1040 |
} |
| 1041 |
|
| 1042 |
int mdecrypt_generic(MCRYPT td, void *ciphertext, int len) |
| 1043 |
{ |
| 1044 |
|
| 1045 |
switch (td->mode_given) { |
| 1046 |
case MCRYPT_CBC: |
| 1047 |
return mdecrypt_cbc(td, ciphertext, len); |
| 1048 |
case MCRYPT_ECB: |
| 1049 |
return mdecrypt_ecb(td, ciphertext, len); |
| 1050 |
case MCRYPT_CFB: |
| 1051 |
return mdecrypt_cfb(td, ciphertext, len); |
| 1052 |
case MCRYPT_OFB: |
| 1053 |
return mdecrypt_ofb(td, ciphertext, len); |
| 1054 |
case MCRYPT_nOFB: |
| 1055 |
return mdecrypt_nofb(td, ciphertext, len); |
| 1056 |
case MCRYPT_STREAM: |
| 1057 |
return mdecrypt_stream(td, ciphertext, len); |
| 1058 |
|
| 1059 |
default: |
| 1060 |
return -1; |
| 1061 |
} |
| 1062 |
|
| 1063 |
} |
| 1064 |
|
| 1065 |
int mcrypt_generic_end(const MCRYPT td) |
| 1066 |
{ |
| 1067 |
|
| 1068 |
switch (td->mode_given) { |
| 1069 |
case MCRYPT_CBC: |
| 1070 |
return end_mcrypt_cbc(td); |
| 1071 |
case MCRYPT_ECB: |
| 1072 |
return end_mcrypt_ecb(td); |
| 1073 |
case MCRYPT_CFB: |
| 1074 |
return end_mcrypt_cfb(td); |
| 1075 |
case MCRYPT_OFB: |
| 1076 |
return end_mcrypt_ofb(td); |
| 1077 |
case MCRYPT_nOFB: |
| 1078 |
return end_mcrypt_nofb(td); |
| 1079 |
case MCRYPT_STREAM: |
| 1080 |
return end_mcrypt_stream(td); |
| 1081 |
default: |
| 1082 |
return -1; |
| 1083 |
} |
| 1084 |
} |
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