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comparison libtomcrypt/src/ciphers/safer/saferp.c @ 398:59c7938af2bd

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merge of '1250b8af44b62d8f4fe0f8d9fc7e7a1cc34e7e1c' and '7f8670ac3bb975f40967f3979d09d2199b7e90c8'
author Matt Johnston <matt@ucc.asn.au>
date Sat, 03 Feb 2007 08:20:30 +0000
parents 0cbe8f6dbf9e
children f849a5ca2efc
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396:e7c1a77d2921 398:59c7938af2bd
4 * algorithms in a highly modular and flexible manner. 4 * algorithms in a highly modular and flexible manner.
5 * 5 *
6 * The library is free for all purposes without any express 6 * The library is free for all purposes without any express
7 * guarantee it works. 7 * guarantee it works.
8 * 8 *
9 * Tom St Denis, [email protected], http://libtomcrypt.org 9 * Tom St Denis, [email protected], http://libtomcrypt.com
10 */ 10 */
11 11
12 /** 12 /**
13 @file saferp.c 13 @file saferp.c
14 SAFER+ Implementation by Tom St Denis 14 SAFER+ Implementation by Tom St Denis
26 &saferp_ecb_encrypt, 26 &saferp_ecb_encrypt,
27 &saferp_ecb_decrypt, 27 &saferp_ecb_decrypt,
28 &saferp_test, 28 &saferp_test,
29 &saferp_done, 29 &saferp_done,
30 &saferp_keysize, 30 &saferp_keysize,
31 NULL, NULL, NULL, NULL, NULL, NULL, NULL 31 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
32 }; 32 };
33 33
34 /* ROUND(b,i) 34 /* ROUND(b,i)
35 * 35 *
36 * This is one forward key application. Note the basic form is 36 * This is one forward key application. Note the basic form is
327 /** 327 /**
328 Encrypts a block of text with SAFER+ 328 Encrypts a block of text with SAFER+
329 @param pt The input plaintext (16 bytes) 329 @param pt The input plaintext (16 bytes)
330 @param ct The output ciphertext (16 bytes) 330 @param ct The output ciphertext (16 bytes)
331 @param skey The key as scheduled 331 @param skey The key as scheduled
332 */ 332 @return CRYPT_OK if successful
333 void saferp_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey) 333 */
334 int saferp_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey)
334 { 335 {
335 unsigned char b[16]; 336 unsigned char b[16];
336 int x; 337 int x;
337 338
338 LTC_ARGCHK(pt != NULL); 339 LTC_ARGCHK(pt != NULL);
382 ct[14] = (b[14] + skey->saferp.K[skey->saferp.rounds*2][14]) & 255; 383 ct[14] = (b[14] + skey->saferp.K[skey->saferp.rounds*2][14]) & 255;
383 ct[15] = b[15] ^ skey->saferp.K[skey->saferp.rounds*2][15]; 384 ct[15] = b[15] ^ skey->saferp.K[skey->saferp.rounds*2][15];
384 #ifdef LTC_CLEAN_STACK 385 #ifdef LTC_CLEAN_STACK
385 zeromem(b, sizeof(b)); 386 zeromem(b, sizeof(b));
386 #endif 387 #endif
388 return CRYPT_OK;
387 } 389 }
388 390
389 /** 391 /**
390 Decrypts a block of text with SAFER+ 392 Decrypts a block of text with SAFER+
391 @param ct The input ciphertext (16 bytes) 393 @param ct The input ciphertext (16 bytes)
392 @param pt The output plaintext (16 bytes) 394 @param pt The output plaintext (16 bytes)
393 @param skey The key as scheduled 395 @param skey The key as scheduled
394 */ 396 @return CRYPT_OK if successful
395 void saferp_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey) 397 */
398 int saferp_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey)
396 { 399 {
397 unsigned char b[16]; 400 unsigned char b[16];
398 int x; 401 int x;
399 402
400 LTC_ARGCHK(pt != NULL); 403 LTC_ARGCHK(pt != NULL);
444 pt[x] = b[x]; 447 pt[x] = b[x];
445 } 448 }
446 #ifdef LTC_CLEAN_STACK 449 #ifdef LTC_CLEAN_STACK
447 zeromem(b, sizeof(b)); 450 zeromem(b, sizeof(b));
448 #endif 451 #endif
452 return CRYPT_OK;
449 } 453 }
450 454
451 /** 455 /**
452 Performs a self-test of the SAFER+ block cipher 456 Performs a self-test of the SAFER+ block cipher
453 @return CRYPT_OK if functional, CRYPT_NOP if self-test has been disabled 457 @return CRYPT_OK if functional, CRYPT_NOP if self-test has been disabled
501 } 505 }
502 saferp_ecb_encrypt(tests[i].pt, tmp[0], &skey); 506 saferp_ecb_encrypt(tests[i].pt, tmp[0], &skey);
503 saferp_ecb_decrypt(tmp[0], tmp[1], &skey); 507 saferp_ecb_decrypt(tmp[0], tmp[1], &skey);
504 508
505 /* compare */ 509 /* compare */
506 if (memcmp(tmp[0], tests[i].ct, 16) || memcmp(tmp[1], tests[i].pt, 16)) { 510 if (XMEMCMP(tmp[0], tests[i].ct, 16) || XMEMCMP(tmp[1], tests[i].pt, 16)) {
507 return CRYPT_FAIL_TESTVECTOR; 511 return CRYPT_FAIL_TESTVECTOR;
508 } 512 }
509 513
510 /* now see if we can encrypt all zero bytes 1000 times, decrypt and come back where we started */ 514 /* now see if we can encrypt all zero bytes 1000 times, decrypt and come back where we started */
511 for (y = 0; y < 16; y++) tmp[0][y] = 0; 515 for (y = 0; y < 16; y++) tmp[0][y] = 0;
549 #endif 553 #endif
550 554
551 555
552 556
553 /* $Source: /cvs/libtom/libtomcrypt/src/ciphers/safer/saferp.c,v $ */ 557 /* $Source: /cvs/libtom/libtomcrypt/src/ciphers/safer/saferp.c,v $ */
554 /* $Revision: 1.7 $ */ 558 /* $Revision: 1.12 $ */
555 /* $Date: 2005/05/05 14:35:58 $ */ 559 /* $Date: 2006/11/08 23:01:06 $ */