diff options
Diffstat (limited to 'libtomcrypt/src/ciphers/twofish/twofish.c')
| -rw-r--r-- | libtomcrypt/src/ciphers/twofish/twofish.c | 48 |
1 files changed, 29 insertions, 19 deletions
diff --git a/libtomcrypt/src/ciphers/twofish/twofish.c b/libtomcrypt/src/ciphers/twofish/twofish.c index f147bab..9e6d0d4 100644 --- a/libtomcrypt/src/ciphers/twofish/twofish.c +++ b/libtomcrypt/src/ciphers/twofish/twofish.c @@ -6,7 +6,7 @@ * The library is free for all purposes without any express * guarantee it works. * - * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.org + * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com */ /** @@ -35,7 +35,7 @@ const struct ltc_cipher_descriptor twofish_desc = &twofish_test, &twofish_done, &twofish_keysize, - NULL, NULL, NULL, NULL, NULL, NULL, NULL + NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }; /* the two polynomials */ @@ -414,8 +414,8 @@ int twofish_setup(const unsigned char *key, int keylen, int num_rounds, symmetri /* make the sboxes (large ram variant) */ if (k == 2) { for (x = 0; x < 256; x++) { - tmpx0 = sbox(0, x); - tmpx1 = sbox(1, x); + tmpx0 = (unsigned char)sbox(0, x); + tmpx1 = (unsigned char)sbox(1, x); skey->twofish.S[0][x] = mds_column_mult(sbox(1, (sbox(0, tmpx0 ^ S[0]) ^ S[4])),0); skey->twofish.S[1][x] = mds_column_mult(sbox(0, (sbox(0, tmpx1 ^ S[1]) ^ S[5])),1); skey->twofish.S[2][x] = mds_column_mult(sbox(1, (sbox(1, tmpx0 ^ S[2]) ^ S[6])),2); @@ -423,8 +423,8 @@ int twofish_setup(const unsigned char *key, int keylen, int num_rounds, symmetri } } else if (k == 3) { for (x = 0; x < 256; x++) { - tmpx0 = sbox(0, x); - tmpx1 = sbox(1, x); + tmpx0 = (unsigned char)sbox(0, x); + tmpx1 = (unsigned char)sbox(1, x); skey->twofish.S[0][x] = mds_column_mult(sbox(1, (sbox(0, sbox(0, tmpx1 ^ S[0]) ^ S[4]) ^ S[8])),0); skey->twofish.S[1][x] = mds_column_mult(sbox(0, (sbox(0, sbox(1, tmpx1 ^ S[1]) ^ S[5]) ^ S[9])),1); skey->twofish.S[2][x] = mds_column_mult(sbox(1, (sbox(1, sbox(0, tmpx0 ^ S[2]) ^ S[6]) ^ S[10])),2); @@ -432,8 +432,8 @@ int twofish_setup(const unsigned char *key, int keylen, int num_rounds, symmetri } } else { for (x = 0; x < 256; x++) { - tmpx0 = sbox(0, x); - tmpx1 = sbox(1, x); + tmpx0 = (unsigned char)sbox(0, x); + tmpx1 = (unsigned char)sbox(1, x); skey->twofish.S[0][x] = mds_column_mult(sbox(1, (sbox(0, sbox(0, sbox(1, tmpx1 ^ S[0]) ^ S[4]) ^ S[8]) ^ S[12])),0); skey->twofish.S[1][x] = mds_column_mult(sbox(0, (sbox(0, sbox(1, sbox(1, tmpx0 ^ S[1]) ^ S[5]) ^ S[9]) ^ S[13])),1); skey->twofish.S[2][x] = mds_column_mult(sbox(1, (sbox(1, sbox(0, sbox(0, tmpx0 ^ S[2]) ^ S[6]) ^ S[10]) ^ S[14])),2); @@ -467,11 +467,12 @@ int twofish_setup(const unsigned char *key, int keylen, int num_rounds, symmetri @param pt The input plaintext (16 bytes) @param ct The output ciphertext (16 bytes) @param skey The key as scheduled + @return CRYPT_OK if successful */ #ifdef LTC_CLEAN_STACK -static void _twofish_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey) +static int _twofish_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey) #else -void twofish_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey) +int twofish_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey) #endif { ulong32 a,b,c,d,ta,tb,tc,td,t1,t2, *k; @@ -521,13 +522,16 @@ void twofish_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_k /* store output */ STORE32L(ta,&ct[0]); STORE32L(tb,&ct[4]); STORE32L(tc,&ct[8]); STORE32L(td,&ct[12]); + + return CRYPT_OK; } #ifdef LTC_CLEAN_STACK -void twofish_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey) +int twofish_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey) { - _twofish_ecb_encrypt(pt, ct, skey); + int err = _twofish_ecb_encrypt(pt, ct, skey); burn_stack(sizeof(ulong32) * 10 + sizeof(int)); + return err; } #endif @@ -536,11 +540,12 @@ void twofish_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_k @param ct The input ciphertext (16 bytes) @param pt The output plaintext (16 bytes) @param skey The key as scheduled + @return CRYPT_OK if successful */ #ifdef LTC_CLEAN_STACK -static void _twofish_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey) +static int _twofish_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey) #else -void twofish_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey) +int twofish_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey) #endif { ulong32 a,b,c,d,ta,tb,tc,td,t1,t2, *k; @@ -593,13 +598,15 @@ void twofish_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_k /* store */ STORE32L(a, &pt[0]); STORE32L(b, &pt[4]); STORE32L(c, &pt[8]); STORE32L(d, &pt[12]); + return CRYPT_OK; } #ifdef LTC_CLEAN_STACK -void twofish_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey) +int twofish_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey) { - _twofish_ecb_decrypt(ct, pt, skey); + int err =_twofish_ecb_decrypt(ct, pt, skey); burn_stack(sizeof(ulong32) * 10 + sizeof(int)); + return err; } #endif @@ -656,7 +663,10 @@ int twofish_test(void) } twofish_ecb_encrypt(tests[i].pt, tmp[0], &key); twofish_ecb_decrypt(tmp[0], tmp[1], &key); - if (memcmp(tmp[0], tests[i].ct, 16) != 0 || memcmp(tmp[1], tests[i].pt, 16) != 0) { + if (XMEMCMP(tmp[0], tests[i].ct, 16) != 0 || XMEMCMP(tmp[1], tests[i].pt, 16) != 0) { +#if 0 + printf("Twofish failed test %d, %d, %d\n", i, XMEMCMP(tmp[0], tests[i].ct, 16), XMEMCMP(tmp[1], tests[i].pt, 16)); +#endif return CRYPT_FAIL_TESTVECTOR; } /* now see if we can encrypt all zero bytes 1000 times, decrypt and come back where we started */ @@ -704,5 +714,5 @@ int twofish_keysize(int *keysize) /* $Source: /cvs/libtom/libtomcrypt/src/ciphers/twofish/twofish.c,v $ */ -/* $Revision: 1.8 $ */ -/* $Date: 2005/05/05 14:35:58 $ */ +/* $Revision: 1.14 $ */ +/* $Date: 2006/12/04 21:34:03 $ */ |