Absolute File Name: | /home/opencoverage/opencoverage/guest-scripts/openssh/src/hmac.c |
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1 | /* $OpenBSD: hmac.c,v 1.12 2015/03/24 20:03:44 markus Exp $ */ | - | ||||||
2 | /* | - | ||||||
3 | * Copyright (c) 2014 Markus Friedl. All rights reserved. | - | ||||||
4 | * | - | ||||||
5 | * Permission to use, copy, modify, and distribute this software for any | - | ||||||
6 | * purpose with or without fee is hereby granted, provided that the above | - | ||||||
7 | * copyright notice and this permission notice appear in all copies. | - | ||||||
8 | * | - | ||||||
9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | - | ||||||
10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | - | ||||||
11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | - | ||||||
12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | - | ||||||
13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | - | ||||||
14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | - | ||||||
15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | - | ||||||
16 | */ | - | ||||||
17 | - | |||||||
18 | #include "includes.h" | - | ||||||
19 | - | |||||||
20 | #include <sys/types.h> | - | ||||||
21 | #include <string.h> | - | ||||||
22 | - | |||||||
23 | #include "sshbuf.h" | - | ||||||
24 | #include "digest.h" | - | ||||||
25 | #include "hmac.h" | - | ||||||
26 | - | |||||||
27 | struct ssh_hmac_ctx { | - | ||||||
28 | int alg; | - | ||||||
29 | struct ssh_digest_ctx *ictx; | - | ||||||
30 | struct ssh_digest_ctx *octx; | - | ||||||
31 | struct ssh_digest_ctx *digest; | - | ||||||
32 | u_char *buf; | - | ||||||
33 | size_t buf_len; | - | ||||||
34 | }; | - | ||||||
35 | - | |||||||
36 | size_t | - | ||||||
37 | ssh_hmac_bytes(int alg) | - | ||||||
38 | { | - | ||||||
39 | return ssh_digest_bytes(alg); executed 416 times by 1 test: return ssh_digest_bytes(alg); Executed by:
| 416 | ||||||
40 | } | - | ||||||
41 | - | |||||||
42 | struct ssh_hmac_ctx * | - | ||||||
43 | ssh_hmac_start(int alg) | - | ||||||
44 | { | - | ||||||
45 | struct ssh_hmac_ctx *ret; | - | ||||||
46 | - | |||||||
47 | if ((ret = calloc(1, sizeof(*ret))) == NULL)
| 0-416 | ||||||
48 | return NULL; never executed: return ((void *)0) ; | 0 | ||||||
49 | ret->alg = alg; | - | ||||||
50 | if ((ret->ictx = ssh_digest_start(alg)) == NULL ||
| 0-416 | ||||||
51 | (ret->octx = ssh_digest_start(alg)) == NULL ||
| 0-416 | ||||||
52 | (ret->digest = ssh_digest_start(alg)) == NULL)
| 0-416 | ||||||
53 | goto fail; never executed: goto fail; | 0 | ||||||
54 | ret->buf_len = ssh_digest_blocksize(ret->ictx); | - | ||||||
55 | if ((ret->buf = calloc(1, ret->buf_len)) == NULL)
| 0-416 | ||||||
56 | goto fail; never executed: goto fail; | 0 | ||||||
57 | return ret; executed 416 times by 1 test: return ret; Executed by:
| 416 | ||||||
58 | fail: | - | ||||||
59 | ssh_hmac_free(ret); | - | ||||||
60 | return NULL; never executed: return ((void *)0) ; | 0 | ||||||
61 | } | - | ||||||
62 | - | |||||||
63 | int | - | ||||||
64 | ssh_hmac_init(struct ssh_hmac_ctx *ctx, const void *key, size_t klen) | - | ||||||
65 | { | - | ||||||
66 | size_t i; | - | ||||||
67 | - | |||||||
68 | /* reset ictx and octx if no is key given */ | - | ||||||
69 | if (key != NULL) {
| 0-416 | ||||||
70 | /* truncate long keys */ | - | ||||||
71 | if (klen <= ctx->buf_len)
| 0-416 | ||||||
72 | memcpy(ctx->buf, key, klen); executed 416 times by 1 test: memcpy(ctx->buf, key, klen); Executed by:
| 416 | ||||||
73 | else if (ssh_digest_memory(ctx->alg, key, klen, ctx->buf,
| 0 | ||||||
74 | ctx->buf_len) < 0)
| 0 | ||||||
75 | return -1; never executed: return -1; | 0 | ||||||
76 | for (i = 0; i < ctx->buf_len; i++)
| 416-26624 | ||||||
77 | ctx->buf[i] ^= 0x36; executed 26624 times by 1 test: ctx->buf[i] ^= 0x36; Executed by:
| 26624 | ||||||
78 | if (ssh_digest_update(ctx->ictx, ctx->buf, ctx->buf_len) < 0)
| 0-416 | ||||||
79 | return -1; never executed: return -1; | 0 | ||||||
80 | for (i = 0; i < ctx->buf_len; i++)
| 416-26624 | ||||||
81 | ctx->buf[i] ^= 0x36 ^ 0x5c; executed 26624 times by 1 test: ctx->buf[i] ^= 0x36 ^ 0x5c; Executed by:
| 26624 | ||||||
82 | if (ssh_digest_update(ctx->octx, ctx->buf, ctx->buf_len) < 0)
| 0-416 | ||||||
83 | return -1; never executed: return -1; | 0 | ||||||
84 | explicit_bzero(ctx->buf, ctx->buf_len); | - | ||||||
85 | } executed 416 times by 1 test: end of block Executed by:
| 416 | ||||||
86 | /* start with ictx */ | - | ||||||
87 | if (ssh_digest_copy_state(ctx->ictx, ctx->digest) < 0)
| 0-416 | ||||||
88 | return -1; never executed: return -1; | 0 | ||||||
89 | return 0; executed 416 times by 1 test: return 0; Executed by:
| 416 | ||||||
90 | } | - | ||||||
91 | - | |||||||
92 | int | - | ||||||
93 | ssh_hmac_update(struct ssh_hmac_ctx *ctx, const void *m, size_t mlen) | - | ||||||
94 | { | - | ||||||
95 | return ssh_digest_update(ctx->digest, m, mlen); executed 416 times by 1 test: return ssh_digest_update(ctx->digest, m, mlen); Executed by:
| 416 | ||||||
96 | } | - | ||||||
97 | - | |||||||
98 | int | - | ||||||
99 | ssh_hmac_update_buffer(struct ssh_hmac_ctx *ctx, const struct sshbuf *b) | - | ||||||
100 | { | - | ||||||
101 | return ssh_digest_update_buffer(ctx->digest, b); never executed: return ssh_digest_update_buffer(ctx->digest, b); | 0 | ||||||
102 | } | - | ||||||
103 | - | |||||||
104 | int | - | ||||||
105 | ssh_hmac_final(struct ssh_hmac_ctx *ctx, u_char *d, size_t dlen) | - | ||||||
106 | { | - | ||||||
107 | size_t len; | - | ||||||
108 | - | |||||||
109 | len = ssh_digest_bytes(ctx->alg); | - | ||||||
110 | if (dlen < len ||
| 0-416 | ||||||
111 | ssh_digest_final(ctx->digest, ctx->buf, len))
| 0-416 | ||||||
112 | return -1; never executed: return -1; | 0 | ||||||
113 | /* switch to octx */ | - | ||||||
114 | if (ssh_digest_copy_state(ctx->octx, ctx->digest) < 0 ||
| 0-416 | ||||||
115 | ssh_digest_update(ctx->digest, ctx->buf, len) < 0 ||
| 0-416 | ||||||
116 | ssh_digest_final(ctx->digest, d, dlen) < 0)
| 0-416 | ||||||
117 | return -1; never executed: return -1; | 0 | ||||||
118 | return 0; executed 416 times by 1 test: return 0; Executed by:
| 416 | ||||||
119 | } | - | ||||||
120 | - | |||||||
121 | void | - | ||||||
122 | ssh_hmac_free(struct ssh_hmac_ctx *ctx) | - | ||||||
123 | { | - | ||||||
124 | if (ctx != NULL) {
| 0-416 | ||||||
125 | ssh_digest_free(ctx->ictx); | - | ||||||
126 | ssh_digest_free(ctx->octx); | - | ||||||
127 | ssh_digest_free(ctx->digest); | - | ||||||
128 | if (ctx->buf) {
| 0-416 | ||||||
129 | explicit_bzero(ctx->buf, ctx->buf_len); | - | ||||||
130 | free(ctx->buf); | - | ||||||
131 | } executed 416 times by 1 test: end of block Executed by:
| 416 | ||||||
132 | explicit_bzero(ctx, sizeof(*ctx)); | - | ||||||
133 | free(ctx); | - | ||||||
134 | } executed 416 times by 1 test: end of block Executed by:
| 416 | ||||||
135 | } executed 416 times by 1 test: end of block Executed by:
| 416 | ||||||
136 | - | |||||||
137 | #ifdef TEST | - | ||||||
138 | - | |||||||
139 | /* cc -DTEST hmac.c digest.c buffer.c cleanup.c fatal.c log.c xmalloc.c -lcrypto */ | - | ||||||
140 | static void | - | ||||||
141 | hmac_test(void *key, size_t klen, void *m, size_t mlen, u_char *e, size_t elen) | - | ||||||
142 | { | - | ||||||
143 | struct ssh_hmac_ctx *ctx; | - | ||||||
144 | size_t i; | - | ||||||
145 | u_char digest[16]; | - | ||||||
146 | - | |||||||
147 | if ((ctx = ssh_hmac_start(SSH_DIGEST_MD5)) == NULL) | - | ||||||
148 | printf("ssh_hmac_start failed"); | - | ||||||
149 | if (ssh_hmac_init(ctx, key, klen) < 0 || | - | ||||||
150 | ssh_hmac_update(ctx, m, mlen) < 0 || | - | ||||||
151 | ssh_hmac_final(ctx, digest, sizeof(digest)) < 0) | - | ||||||
152 | printf("ssh_hmac_xxx failed"); | - | ||||||
153 | ssh_hmac_free(ctx); | - | ||||||
154 | - | |||||||
155 | if (memcmp(e, digest, elen)) { | - | ||||||
156 | for (i = 0; i < elen; i++) | - | ||||||
157 | printf("[%zu] %2.2x %2.2x\n", i, e[i], digest[i]); | - | ||||||
158 | printf("mismatch\n"); | - | ||||||
159 | } else | - | ||||||
160 | printf("ok\n"); | - | ||||||
161 | } | - | ||||||
162 | - | |||||||
163 | int | - | ||||||
164 | main(int argc, char **argv) | - | ||||||
165 | { | - | ||||||
166 | /* try test vectors from RFC 2104 */ | - | ||||||
167 | - | |||||||
168 | u_char key1[16] = { | - | ||||||
169 | 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, | - | ||||||
170 | 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb, 0xb }; | - | ||||||
171 | u_char *data1 = "Hi There"; | - | ||||||
172 | u_char dig1[16] = { | - | ||||||
173 | 0x92, 0x94, 0x72, 0x7a, 0x36, 0x38, 0xbb, 0x1c, | - | ||||||
174 | 0x13, 0xf4, 0x8e, 0xf8, 0x15, 0x8b, 0xfc, 0x9d }; | - | ||||||
175 | - | |||||||
176 | u_char *key2 = "Jefe"; | - | ||||||
177 | u_char *data2 = "what do ya want for nothing?"; | - | ||||||
178 | u_char dig2[16] = { | - | ||||||
179 | 0x75, 0x0c, 0x78, 0x3e, 0x6a, 0xb0, 0xb5, 0x03, | - | ||||||
180 | 0xea, 0xa8, 0x6e, 0x31, 0x0a, 0x5d, 0xb7, 0x38 }; | - | ||||||
181 | - | |||||||
182 | u_char key3[16]; | - | ||||||
183 | u_char data3[50]; | - | ||||||
184 | u_char dig3[16] = { | - | ||||||
185 | 0x56, 0xbe, 0x34, 0x52, 0x1d, 0x14, 0x4c, 0x88, | - | ||||||
186 | 0xdb, 0xb8, 0xc7, 0x33, 0xf0, 0xe8, 0xb3, 0xf6 }; | - | ||||||
187 | memset(key3, 0xaa, sizeof(key3)); | - | ||||||
188 | memset(data3, 0xdd, sizeof(data3)); | - | ||||||
189 | - | |||||||
190 | hmac_test(key1, sizeof(key1), data1, strlen(data1), dig1, sizeof(dig1)); | - | ||||||
191 | hmac_test(key2, strlen(key2), data2, strlen(data2), dig2, sizeof(dig2)); | - | ||||||
192 | hmac_test(key3, sizeof(key3), data3, sizeof(data3), dig3, sizeof(dig3)); | - | ||||||
193 | - | |||||||
194 | return 0; | - | ||||||
195 | } | - | ||||||
196 | - | |||||||
197 | #endif | - | ||||||
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