99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*
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* Tom St Denis, tomstdenis@iahu.ca, http://libtomcrypt.org
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*/
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/* SHA-224 new NIST standard based off of SHA-256 truncated to 224 bits */
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const struct _hash_descriptor sha224_desc =
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{
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"sha224",
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10,
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28,
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64,
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/* DER identifier (not supported) */
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{ 0x00 },
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0,
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&sha224_init,
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&sha256_process,
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&sha224_done,
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&sha224_test
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};
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/* init the sha256 er... sha224 state ;-) */
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void sha224_init(hash_state * md)
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{
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_ARGCHK(md != NULL);
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md->sha256.curlen = 0;
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md->sha256.length = 0;
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md->sha256.state[0] = 0xc1059ed8UL;
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md->sha256.state[1] = 0x367cd507UL;
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md->sha256.state[2] = 0x3070dd17UL;
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md->sha256.state[3] = 0xf70e5939UL;
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md->sha256.state[4] = 0xffc00b31UL;
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md->sha256.state[5] = 0x68581511UL;
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md->sha256.state[6] = 0x64f98fa7UL;
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md->sha256.state[7] = 0xbefa4fa4UL;
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}
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int sha224_done(hash_state * md, unsigned char *hash)
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{
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unsigned char buf[32];
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int err;
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err = sha256_done(md, buf);
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XMEMCPY(hash, buf, 28);
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#ifdef CLEAN_STACK
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zeromem(buf, sizeof(buf));
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#endif
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return err;
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}
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int sha224_test(void)
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{
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#ifndef LTC_TEST
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return CRYPT_NOP;
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#else
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static const struct {
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char *msg;
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unsigned char hash[28];
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} tests[] = {
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{ "abc",
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{ 0x23, 0x09, 0x7d, 0x22, 0x34, 0x05, 0xd8,
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0x22, 0x86, 0x42, 0xa4, 0x77, 0xbd, 0xa2,
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0x55, 0xb3, 0x2a, 0xad, 0xbc, 0xe4, 0xbd,
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0xa0, 0xb3, 0xf7, 0xe3, 0x6c, 0x9d, 0xa7 }
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},
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{ "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
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{ 0x75, 0x38, 0x8b, 0x16, 0x51, 0x27, 0x76,
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0xcc, 0x5d, 0xba, 0x5d, 0xa1, 0xfd, 0x89,
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0x01, 0x50, 0xb0, 0xc6, 0x45, 0x5c, 0xb4,
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0xf5, 0x8b, 0x19, 0x52, 0x52, 0x25, 0x25 }
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},
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};
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int i;
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unsigned char tmp[28];
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hash_state md;
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for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) {
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sha224_init(&md);
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sha224_process(&md, (unsigned char*)tests[i].msg, (unsigned long)strlen(tests[i].msg));
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sha224_done(&md, tmp);
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if (memcmp(tmp, tests[i].hash, 28) != 0) {
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return CRYPT_FAIL_TESTVECTOR;
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}
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}
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return CRYPT_OK;
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#endif
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}
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