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2ff8003a | 1 | /* |
2 | * Copyright (c) 2005 Damien Miller <djm@openbsd.org> | |
3 | * | |
4 | * Permission to use, copy, modify, and distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
17 | /* EVP wrapper for SHA256 */ | |
18 | ||
19 | #include "includes.h" | |
13ff27b7 | 20 | |
21 | #ifndef HAVE_EVP_SHA256 | |
22 | ||
f73e2ad7 | 23 | #include <string.h> |
2ff8003a | 24 | #include <openssl/evp.h> |
f73e2ad7 | 25 | #if defined(HAVE_SHA2_H) && defined(HAVE_SHA256_UPDATE) |
26 | # include <sha2.h> | |
27 | #endif | |
2ff8003a | 28 | |
29 | RCSID("$OpenBSD: md-sha256.c,v 1.1 2006/03/07 09:07:40 djm Exp $"); | |
30 | ||
31 | const EVP_MD *evp_ssh_sha256(void); | |
32 | ||
33 | static int | |
34 | ssh_sha256_init(EVP_MD_CTX *ctxt) | |
35 | { | |
36 | SHA256_Init(ctxt->md_data); | |
37 | return (1); | |
38 | } | |
39 | ||
40 | static int | |
41 | ssh_sha256_update(EVP_MD_CTX *ctxt, const void *data, unsigned long len) | |
42 | { | |
43 | SHA256_Update(ctxt->md_data, data, len); | |
44 | return (1); | |
45 | } | |
46 | ||
47 | static int | |
48 | ssh_sha256_final(EVP_MD_CTX *ctxt, unsigned char *digest) | |
49 | { | |
50 | SHA256_Final(digest, ctxt->md_data); | |
51 | return (1); | |
52 | } | |
53 | ||
54 | static int | |
55 | ssh_sha256_cleanup(EVP_MD_CTX *ctxt) | |
56 | { | |
57 | memset(ctxt->md_data, 0, sizeof(SHA256_CTX)); | |
58 | return (1); | |
59 | } | |
60 | ||
61 | const EVP_MD * | |
62 | evp_ssh_sha256(void) | |
63 | { | |
64 | static EVP_MD ssh_sha256; | |
65 | ||
66 | memset(&ssh_sha256, 0, sizeof(ssh_sha256)); | |
67 | ssh_sha256.type = NID_undef; | |
68 | ssh_sha256.md_size = SHA256_DIGEST_LENGTH; | |
69 | ssh_sha256.init = ssh_sha256_init; | |
70 | ssh_sha256.update = ssh_sha256_update; | |
71 | ssh_sha256.final = ssh_sha256_final; | |
72 | ssh_sha256.cleanup = ssh_sha256_cleanup; | |
73 | ssh_sha256.block_size = SHA256_BLOCK_LENGTH; | |
74 | ssh_sha256.ctx_size = sizeof(SHA256_CTX); | |
75 | ||
76 | return (&ssh_sha256); | |
77 | } | |
13ff27b7 | 78 | |
79 | #endif /* HAVE_EVP_SHA256 */ | |
80 |