253 lines
7.9 KiB
C
253 lines
7.9 KiB
C
/* camellia-glue.c - Glue for the Camellia cipher
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* Copyright (C) 2007 Free Software Foundation, Inc.
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*
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* This file is part of Libgcrypt.
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*
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* Libgcrypt is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* Libgcrypt 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*/
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/* I put all the libgcrypt-specific stuff in this file to keep the
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camellia.c/camellia.h files exactly as provided by NTT. If they
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update their code, this should make it easier to bring the changes
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in. - dshaw
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There is one small change which needs to be done: Include the
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following code at the top of camellia.h: */
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#if 0
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/* To use Camellia with libraries it is often useful to keep the name
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* space of the library clean. The following macro is thus useful:
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*
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* #define CAMELLIA_EXT_SYM_PREFIX foo_
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*
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* This prefixes all external symbols with "foo_".
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#ifdef CAMELLIA_EXT_SYM_PREFIX
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#define CAMELLIA_PREFIX1(x,y) x ## y
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#define CAMELLIA_PREFIX2(x,y) CAMELLIA_PREFIX1(x,y)
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#define CAMELLIA_PREFIX(x) CAMELLIA_PREFIX2(CAMELLIA_EXT_SYM_PREFIX,x)
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#define Camellia_Ekeygen CAMELLIA_PREFIX(Camellia_Ekeygen)
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#define Camellia_EncryptBlock CAMELLIA_PREFIX(Camellia_EncryptBlock)
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#define Camellia_DecryptBlock CAMELLIA_PREFIX(Camellia_DecryptBlock)
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#define camellia_decrypt128 CAMELLIA_PREFIX(camellia_decrypt128)
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#define camellia_decrypt256 CAMELLIA_PREFIX(camellia_decrypt256)
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#define camellia_encrypt128 CAMELLIA_PREFIX(camellia_encrypt128)
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#define camellia_encrypt256 CAMELLIA_PREFIX(camellia_encrypt256)
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#define camellia_setup128 CAMELLIA_PREFIX(camellia_setup128)
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#define camellia_setup192 CAMELLIA_PREFIX(camellia_setup192)
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#define camellia_setup256 CAMELLIA_PREFIX(camellia_setup256)
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#endif /*CAMELLIA_EXT_SYM_PREFIX*/
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#endif /* Code sample. */
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#include <config.h>
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#include "types.h"
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#include "g10lib.h"
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#include "cipher.h"
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#include "camellia.h"
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typedef struct
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{
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int keybitlength;
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KEY_TABLE_TYPE keytable;
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} CAMELLIA_context;
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static const char *selftest(void);
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static gcry_err_code_t
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camellia_setkey(void *c, const byte *key, unsigned keylen)
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{
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CAMELLIA_context *ctx=c;
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static int initialized=0;
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static const char *selftest_failed=NULL;
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if(keylen!=16 && keylen!=24 && keylen!=32)
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return GPG_ERR_INV_KEYLEN;
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if(!initialized)
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{
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initialized=1;
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selftest_failed=selftest();
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if(selftest_failed)
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log_error("%s\n",selftest_failed);
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}
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if(selftest_failed)
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return GPG_ERR_SELFTEST_FAILED;
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ctx->keybitlength=keylen*8;
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Camellia_Ekeygen(ctx->keybitlength,key,ctx->keytable);
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_gcry_burn_stack
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((19+34+34)*sizeof(u32)+2*sizeof(void*) /* camellia_setup256 */
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+(4+32)*sizeof(u32)+2*sizeof(void*) /* camellia_setup192 */
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+0+sizeof(int)+2*sizeof(void*) /* Camellia_Ekeygen */
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+3*2*sizeof(void*) /* Function calls. */
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);
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return 0;
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}
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static void
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camellia_encrypt(void *c, byte *outbuf, const byte *inbuf)
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{
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CAMELLIA_context *ctx=c;
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Camellia_EncryptBlock(ctx->keybitlength,inbuf,ctx->keytable,outbuf);
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_gcry_burn_stack
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(sizeof(int)+2*sizeof(unsigned char *)+sizeof(KEY_TABLE_TYPE)
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+4*sizeof(u32)
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+2*sizeof(u32*)+4*sizeof(u32)
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+2*2*sizeof(void*) /* Function calls. */
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);
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}
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static void
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camellia_decrypt(void *c, byte *outbuf, const byte *inbuf)
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{
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CAMELLIA_context *ctx=c;
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Camellia_DecryptBlock(ctx->keybitlength,inbuf,ctx->keytable,outbuf);
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_gcry_burn_stack
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(sizeof(int)+2*sizeof(unsigned char *)+sizeof(KEY_TABLE_TYPE)
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+4*sizeof(u32)
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+2*sizeof(u32*)+4*sizeof(u32)
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+2*2*sizeof(void*) /* Function calls. */
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);
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}
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static const char *
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selftest(void)
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{
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CAMELLIA_context ctx;
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byte scratch[16];
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/* These test vectors are from RFC-3713 */
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const byte plaintext[]=
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{
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0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,
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0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10
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};
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const byte key_128[]=
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{
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0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,
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0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10
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};
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const byte ciphertext_128[]=
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{
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0x67,0x67,0x31,0x38,0x54,0x96,0x69,0x73,
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0x08,0x57,0x06,0x56,0x48,0xea,0xbe,0x43
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};
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const byte key_192[]=
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{
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0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,0xfe,0xdc,0xba,0x98,
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0x76,0x54,0x32,0x10,0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77
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};
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const byte ciphertext_192[]=
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{
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0xb4,0x99,0x34,0x01,0xb3,0xe9,0x96,0xf8,
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0x4e,0xe5,0xce,0xe7,0xd7,0x9b,0x09,0xb9
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};
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const byte key_256[]=
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{
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0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,0xfe,0xdc,0xba,
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0x98,0x76,0x54,0x32,0x10,0x00,0x11,0x22,0x33,0x44,0x55,
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0x66,0x77,0x88,0x99,0xaa,0xbb,0xcc,0xdd,0xee,0xff
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};
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const byte ciphertext_256[]=
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{
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0x9a,0xcc,0x23,0x7d,0xff,0x16,0xd7,0x6c,
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0x20,0xef,0x7c,0x91,0x9e,0x3a,0x75,0x09
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};
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camellia_setkey(&ctx,key_128,sizeof(key_128));
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camellia_encrypt(&ctx,scratch,plaintext);
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if(memcmp(scratch,ciphertext_128,sizeof(ciphertext_128))!=0)
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return "CAMELLIA-128 test encryption failed.";
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camellia_decrypt(&ctx,scratch,scratch);
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if(memcmp(scratch,plaintext,sizeof(plaintext))!=0)
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return "CAMELLIA-128 test decryption failed.";
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camellia_setkey(&ctx,key_192,sizeof(key_192));
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camellia_encrypt(&ctx,scratch,plaintext);
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if(memcmp(scratch,ciphertext_192,sizeof(ciphertext_192))!=0)
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return "CAMELLIA-192 test encryption failed.";
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camellia_decrypt(&ctx,scratch,scratch);
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if(memcmp(scratch,plaintext,sizeof(plaintext))!=0)
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return "CAMELLIA-192 test decryption failed.";
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camellia_setkey(&ctx,key_256,sizeof(key_256));
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camellia_encrypt(&ctx,scratch,plaintext);
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if(memcmp(scratch,ciphertext_256,sizeof(ciphertext_256))!=0)
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return "CAMELLIA-256 test encryption failed.";
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camellia_decrypt(&ctx,scratch,scratch);
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if(memcmp(scratch,plaintext,sizeof(plaintext))!=0)
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return "CAMELLIA-256 test decryption failed.";
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return NULL;
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}
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/* These oids are from
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<http://info.isl.ntt.co.jp/crypt/eng/camellia/specifications_oid.html>,
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retrieved May 1, 2007. */
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static gcry_cipher_oid_spec_t camellia128_oids[] =
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{
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{"1.2.392.200011.61.1.1.1.2", GCRY_CIPHER_MODE_CBC},
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{"0.3.4401.5.3.1.9.1", GCRY_CIPHER_MODE_ECB},
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{"0.3.4401.5.3.1.9.3", GCRY_CIPHER_MODE_OFB},
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{"0.3.4401.5.3.1.9.4", GCRY_CIPHER_MODE_CFB},
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{ NULL }
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};
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static gcry_cipher_oid_spec_t camellia192_oids[] =
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{
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{"1.2.392.200011.61.1.1.1.3", GCRY_CIPHER_MODE_CBC},
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{"0.3.4401.5.3.1.9.21", GCRY_CIPHER_MODE_ECB},
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{"0.3.4401.5.3.1.9.23", GCRY_CIPHER_MODE_OFB},
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{"0.3.4401.5.3.1.9.24", GCRY_CIPHER_MODE_CFB},
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{ NULL }
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};
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static gcry_cipher_oid_spec_t camellia256_oids[] =
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{
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{"1.2.392.200011.61.1.1.1.4", GCRY_CIPHER_MODE_CBC},
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{"0.3.4401.5.3.1.9.41", GCRY_CIPHER_MODE_ECB},
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{"0.3.4401.5.3.1.9.43", GCRY_CIPHER_MODE_OFB},
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{"0.3.4401.5.3.1.9.44", GCRY_CIPHER_MODE_CFB},
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{ NULL }
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};
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gcry_cipher_spec_t _gcry_cipher_spec_camellia128 =
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{
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"CAMELLIA128",NULL,camellia128_oids,CAMELLIA_BLOCK_SIZE,128,
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sizeof(CAMELLIA_context),camellia_setkey,camellia_encrypt,camellia_decrypt
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};
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gcry_cipher_spec_t _gcry_cipher_spec_camellia192 =
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{
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"CAMELLIA192",NULL,camellia192_oids,CAMELLIA_BLOCK_SIZE,192,
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sizeof(CAMELLIA_context),camellia_setkey,camellia_encrypt,camellia_decrypt
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};
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gcry_cipher_spec_t _gcry_cipher_spec_camellia256 =
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{
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"CAMELLIA256",NULL,camellia256_oids,CAMELLIA_BLOCK_SIZE,256,
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sizeof(CAMELLIA_context),camellia_setkey,camellia_encrypt,camellia_decrypt
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};
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