diff options
Diffstat (limited to 'digest.c')
-rw-r--r-- | digest.c | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/digest.c b/digest.c deleted file mode 100644 index 1a11b2b1c..000000000 --- a/digest.c +++ /dev/null | |||
@@ -1,166 +0,0 @@ | |||
1 | /* $OpenBSD: digest.c,v 1.4 2014/01/27 18:58:14 markus Exp $ */ | ||
2 | /* | ||
3 | * Copyright (c) 2013 Damien Miller <djm@mindrot.org> | ||
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 <limits.h> | ||
22 | #include <stdlib.h> | ||
23 | #include <string.h> | ||
24 | |||
25 | #include <openssl/evp.h> | ||
26 | |||
27 | #include "openbsd-compat/openssl-compat.h" | ||
28 | |||
29 | #include "buffer.h" | ||
30 | #include "digest.h" | ||
31 | |||
32 | struct ssh_digest_ctx { | ||
33 | int alg; | ||
34 | EVP_MD_CTX mdctx; | ||
35 | }; | ||
36 | |||
37 | struct ssh_digest { | ||
38 | int id; | ||
39 | const char *name; | ||
40 | size_t digest_len; | ||
41 | const EVP_MD *(*mdfunc)(void); | ||
42 | }; | ||
43 | |||
44 | /* NB. Indexed directly by algorithm number */ | ||
45 | const struct ssh_digest digests[] = { | ||
46 | { SSH_DIGEST_MD5, "MD5", 16, EVP_md5 }, | ||
47 | { SSH_DIGEST_RIPEMD160, "RIPEMD160", 20, EVP_ripemd160 }, | ||
48 | { SSH_DIGEST_SHA1, "SHA1", 20, EVP_sha1 }, | ||
49 | #ifdef HAVE_EVP_SHA256 /* XXX replace with local if missing */ | ||
50 | { SSH_DIGEST_SHA256, "SHA256", 32, EVP_sha256 }, | ||
51 | { SSH_DIGEST_SHA384, "SHA384", 48, EVP_sha384 }, | ||
52 | { SSH_DIGEST_SHA512, "SHA512", 64, EVP_sha512 }, | ||
53 | #endif | ||
54 | { -1, NULL, 0, NULL }, | ||
55 | }; | ||
56 | |||
57 | static const struct ssh_digest * | ||
58 | ssh_digest_by_alg(int alg) | ||
59 | { | ||
60 | if (alg < 0 || alg >= SSH_DIGEST_MAX) | ||
61 | return NULL; | ||
62 | if (digests[alg].id != alg) /* sanity */ | ||
63 | return NULL; | ||
64 | return &(digests[alg]); | ||
65 | } | ||
66 | |||
67 | size_t | ||
68 | ssh_digest_bytes(int alg) | ||
69 | { | ||
70 | const struct ssh_digest *digest = ssh_digest_by_alg(alg); | ||
71 | |||
72 | return digest == NULL ? 0 : digest->digest_len; | ||
73 | } | ||
74 | |||
75 | size_t | ||
76 | ssh_digest_blocksize(struct ssh_digest_ctx *ctx) | ||
77 | { | ||
78 | return EVP_MD_CTX_block_size(&ctx->mdctx); | ||
79 | } | ||
80 | |||
81 | struct ssh_digest_ctx * | ||
82 | ssh_digest_start(int alg) | ||
83 | { | ||
84 | const struct ssh_digest *digest = ssh_digest_by_alg(alg); | ||
85 | struct ssh_digest_ctx *ret; | ||
86 | |||
87 | if (digest == NULL || ((ret = calloc(1, sizeof(*ret))) == NULL)) | ||
88 | return NULL; | ||
89 | ret->alg = alg; | ||
90 | EVP_MD_CTX_init(&ret->mdctx); | ||
91 | if (EVP_DigestInit_ex(&ret->mdctx, digest->mdfunc(), NULL) != 1) { | ||
92 | free(ret); | ||
93 | return NULL; | ||
94 | } | ||
95 | return ret; | ||
96 | } | ||
97 | |||
98 | int | ||
99 | ssh_digest_copy_state(struct ssh_digest_ctx *from, struct ssh_digest_ctx *to) | ||
100 | { | ||
101 | /* we have bcopy-style order while openssl has memcpy-style */ | ||
102 | if (!EVP_MD_CTX_copy_ex(&to->mdctx, &from->mdctx)) | ||
103 | return -1; | ||
104 | return 0; | ||
105 | } | ||
106 | |||
107 | int | ||
108 | ssh_digest_update(struct ssh_digest_ctx *ctx, const void *m, size_t mlen) | ||
109 | { | ||
110 | if (EVP_DigestUpdate(&ctx->mdctx, m, mlen) != 1) | ||
111 | return -1; | ||
112 | return 0; | ||
113 | } | ||
114 | |||
115 | int | ||
116 | ssh_digest_update_buffer(struct ssh_digest_ctx *ctx, const Buffer *b) | ||
117 | { | ||
118 | return ssh_digest_update(ctx, buffer_ptr(b), buffer_len(b)); | ||
119 | } | ||
120 | |||
121 | int | ||
122 | ssh_digest_final(struct ssh_digest_ctx *ctx, u_char *d, size_t dlen) | ||
123 | { | ||
124 | const struct ssh_digest *digest = ssh_digest_by_alg(ctx->alg); | ||
125 | u_int l = dlen; | ||
126 | |||
127 | if (dlen > UINT_MAX) | ||
128 | return -1; | ||
129 | if (dlen < digest->digest_len) /* No truncation allowed */ | ||
130 | return -1; | ||
131 | if (EVP_DigestFinal_ex(&ctx->mdctx, d, &l) != 1) | ||
132 | return -1; | ||
133 | if (l != digest->digest_len) /* sanity */ | ||
134 | return -1; | ||
135 | return 0; | ||
136 | } | ||
137 | |||
138 | void | ||
139 | ssh_digest_free(struct ssh_digest_ctx *ctx) | ||
140 | { | ||
141 | if (ctx != NULL) { | ||
142 | EVP_MD_CTX_cleanup(&ctx->mdctx); | ||
143 | memset(ctx, 0, sizeof(*ctx)); | ||
144 | free(ctx); | ||
145 | } | ||
146 | } | ||
147 | |||
148 | int | ||
149 | ssh_digest_memory(int alg, const void *m, size_t mlen, u_char *d, size_t dlen) | ||
150 | { | ||
151 | struct ssh_digest_ctx *ctx = ssh_digest_start(alg); | ||
152 | |||
153 | if (ctx == NULL) | ||
154 | return -1; | ||
155 | if (ssh_digest_update(ctx, m, mlen) != 0 || | ||
156 | ssh_digest_final(ctx, d, dlen) != 0) | ||
157 | return -1; | ||
158 | ssh_digest_free(ctx); | ||
159 | return 0; | ||
160 | } | ||
161 | |||
162 | int | ||
163 | ssh_digest_buffer(int alg, const Buffer *b, u_char *d, size_t dlen) | ||
164 | { | ||
165 | return ssh_digest_memory(alg, buffer_ptr(b), buffer_len(b), d, dlen); | ||
166 | } | ||