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comparison src/hashes/sha2/sha224.c @ 192:9cc34777b479 libtomcrypt

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propagate from branch 'au.asn.ucc.matt.ltc-orig' (head 9ba8f01f44320e9cb9f19881105ae84f84a43ea9) to branch 'au.asn.ucc.matt.dropbear.ltc' (head dbf51c569bc34956ad948e4cc87a0eeb2170b768)
author Matt Johnston <matt@ucc.asn.au>
date Sun, 08 May 2005 06:36:47 +0000
parents 1c15b283127b
children 39d5d58461d6
comparison
equal deleted inserted replaced
164:cd1143579f00 192:9cc34777b479
1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
2 *
3 * LibTomCrypt is a library that provides various cryptographic
4 * algorithms in a highly modular and flexible manner.
5 *
6 * The library is free for all purposes without any express
7 * guarantee it works.
8 *
9 * Tom St Denis, [email protected], http://libtomcrypt.org
10 */
11 /**
12 @param sha224.c
13 SHA-224 new NIST standard based off of SHA-256 truncated to 224 bits (Tom St Denis)
14 */
15
16 const struct ltc_hash_descriptor sha224_desc =
17 {
18 "sha224",
19 10,
20 28,
21 64,
22
23 /* DER identifier (not supported) */
24 { 0x00 },
25 0,
26
27 &sha224_init,
28 &sha256_process,
29 &sha224_done,
30 &sha224_test
31 };
32
33 /* init the sha256 er... sha224 state ;-) */
34 /**
35 Initialize the hash state
36 @param md The hash state you wish to initialize
37 @return CRYPT_OK if successful
38 */
39 int sha224_init(hash_state * md)
40 {
41 LTC_ARGCHK(md != NULL);
42
43 md->sha256.curlen = 0;
44 md->sha256.length = 0;
45 md->sha256.state[0] = 0xc1059ed8UL;
46 md->sha256.state[1] = 0x367cd507UL;
47 md->sha256.state[2] = 0x3070dd17UL;
48 md->sha256.state[3] = 0xf70e5939UL;
49 md->sha256.state[4] = 0xffc00b31UL;
50 md->sha256.state[5] = 0x68581511UL;
51 md->sha256.state[6] = 0x64f98fa7UL;
52 md->sha256.state[7] = 0xbefa4fa4UL;
53 return CRYPT_OK;
54 }
55
56 /**
57 Terminate the hash to get the digest
58 @param md The hash state
59 @param out [out] The destination of the hash (28 bytes)
60 @return CRYPT_OK if successful
61 */
62 int sha224_done(hash_state * md, unsigned char *out)
63 {
64 unsigned char buf[32];
65 int err;
66
67 LTC_ARGCHK(md != NULL);
68 LTC_ARGCHK(out != NULL);
69
70 err = sha256_done(md, buf);
71 XMEMCPY(out, buf, 28);
72 #ifdef LTC_CLEAN_STACK
73 zeromem(buf, sizeof(buf));
74 #endif
75 return err;
76 }
77
78 /**
79 Self-test the hash
80 @return CRYPT_OK if successful, CRYPT_NOP if self-tests have been disabled
81 */
82 int sha224_test(void)
83 {
84 #ifndef LTC_TEST
85 return CRYPT_NOP;
86 #else
87 static const struct {
88 char *msg;
89 unsigned char hash[28];
90 } tests[] = {
91 { "abc",
92 { 0x23, 0x09, 0x7d, 0x22, 0x34, 0x05, 0xd8,
93 0x22, 0x86, 0x42, 0xa4, 0x77, 0xbd, 0xa2,
94 0x55, 0xb3, 0x2a, 0xad, 0xbc, 0xe4, 0xbd,
95 0xa0, 0xb3, 0xf7, 0xe3, 0x6c, 0x9d, 0xa7 }
96 },
97 { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
98 { 0x75, 0x38, 0x8b, 0x16, 0x51, 0x27, 0x76,
99 0xcc, 0x5d, 0xba, 0x5d, 0xa1, 0xfd, 0x89,
100 0x01, 0x50, 0xb0, 0xc6, 0x45, 0x5c, 0xb4,
101 0xf5, 0x8b, 0x19, 0x52, 0x52, 0x25, 0x25 }
102 },
103 };
104
105 int i;
106 unsigned char tmp[28];
107 hash_state md;
108
109 for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) {
110 sha224_init(&md);
111 sha224_process(&md, (unsigned char*)tests[i].msg, (unsigned long)strlen(tests[i].msg));
112 sha224_done(&md, tmp);
113 if (memcmp(tmp, tests[i].hash, 28) != 0) {
114 return CRYPT_FAIL_TESTVECTOR;
115 }
116 }
117 return CRYPT_OK;
118 #endif
119 }
120