| /* LibTomCrypt, modular cryptographic library -- Tom St Denis |
| * |
| * LibTomCrypt is a library that provides various cryptographic |
| * algorithms in a highly modular and flexible manner. |
| * |
| * The library is free for all purposes without any express |
| * guarantee it works. |
| * |
| * Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com |
| */ |
| /** |
| @param sha224.c |
| SHA-224 new NIST standard based off of SHA-256 truncated to 224 bits (Tom St Denis) |
| */ |
| |
| const struct ltc_hash_descriptor sha224_desc = |
| { |
| "sha224", |
| 10, |
| 28, |
| 64, |
| |
| /* OID */ |
| { 2, 16, 840, 1, 101, 3, 4, 2, 4, }, |
| 9, |
| |
| &sha224_init, |
| &sha256_process, |
| &sha224_done, |
| &sha224_test, |
| NULL |
| }; |
| |
| /* init the sha256 er... sha224 state ;-) */ |
| /** |
| Initialize the hash state |
| @param md The hash state you wish to initialize |
| @return CRYPT_OK if successful |
| */ |
| int sha224_init(hash_state * md) |
| { |
| LTC_ARGCHK(md != NULL); |
| |
| md->sha256.curlen = 0; |
| md->sha256.length = 0; |
| md->sha256.state[0] = 0xc1059ed8UL; |
| md->sha256.state[1] = 0x367cd507UL; |
| md->sha256.state[2] = 0x3070dd17UL; |
| md->sha256.state[3] = 0xf70e5939UL; |
| md->sha256.state[4] = 0xffc00b31UL; |
| md->sha256.state[5] = 0x68581511UL; |
| md->sha256.state[6] = 0x64f98fa7UL; |
| md->sha256.state[7] = 0xbefa4fa4UL; |
| return CRYPT_OK; |
| } |
| |
| /** |
| Terminate the hash to get the digest |
| @param md The hash state |
| @param out [out] The destination of the hash (28 bytes) |
| @return CRYPT_OK if successful |
| */ |
| int sha224_done(hash_state * md, unsigned char *out) |
| { |
| unsigned char buf[32]; |
| int err; |
| |
| LTC_ARGCHK(md != NULL); |
| LTC_ARGCHK(out != NULL); |
| |
| err = sha256_done(md, buf); |
| XMEMCPY(out, buf, 28); |
| #ifdef LTC_CLEAN_STACK |
| zeromem(buf, sizeof(buf)); |
| #endif |
| return err; |
| } |
| |
| /** |
| Self-test the hash |
| @return CRYPT_OK if successful, CRYPT_NOP if self-tests have been disabled |
| */ |
| int sha224_test(void) |
| { |
| #ifndef LTC_TEST |
| return CRYPT_NOP; |
| #else |
| static const struct { |
| char *msg; |
| unsigned char hash[28]; |
| } tests[] = { |
| { "abc", |
| { 0x23, 0x09, 0x7d, 0x22, 0x34, 0x05, 0xd8, |
| 0x22, 0x86, 0x42, 0xa4, 0x77, 0xbd, 0xa2, |
| 0x55, 0xb3, 0x2a, 0xad, 0xbc, 0xe4, 0xbd, |
| 0xa0, 0xb3, 0xf7, 0xe3, 0x6c, 0x9d, 0xa7 } |
| }, |
| { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", |
| { 0x75, 0x38, 0x8b, 0x16, 0x51, 0x27, 0x76, |
| 0xcc, 0x5d, 0xba, 0x5d, 0xa1, 0xfd, 0x89, |
| 0x01, 0x50, 0xb0, 0xc6, 0x45, 0x5c, 0xb4, |
| 0xf5, 0x8b, 0x19, 0x52, 0x52, 0x25, 0x25 } |
| }, |
| }; |
| |
| int i; |
| unsigned char tmp[28]; |
| hash_state md; |
| |
| for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) { |
| sha224_init(&md); |
| sha224_process(&md, (unsigned char*)tests[i].msg, (unsigned long)strlen(tests[i].msg)); |
| sha224_done(&md, tmp); |
| if (XMEMCMP(tmp, tests[i].hash, 28) != 0) { |
| return CRYPT_FAIL_TESTVECTOR; |
| } |
| } |
| return CRYPT_OK; |
| #endif |
| } |
| |
| |
| /* $Source: /cvs/libtom/libtomcrypt/src/hashes/sha2/sha224.c,v $ */ |
| /* $Revision: 1.8 $ */ |
| /* $Date: 2006/11/01 09:28:17 $ */ |