Annotation of src/usr.bin/ssh/md-sha256.c, Revision 1.6
1.6 ! djm 1: /* $OpenBSD: md-sha256.c,v 1.5 2006/08/03 03:34:42 deraadt Exp $ */
1.1 djm 2: /*
3: * Copyright (c) 2005 Damien Miller <djm@openbsd.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: /* EVP wrapper for SHA256 */
19:
1.5 deraadt 20: #include <sys/types.h>
1.4 stevesk 21:
1.1 djm 22: #include <openssl/evp.h>
1.4 stevesk 23:
1.1 djm 24: #include <sha2.h>
1.4 stevesk 25: #include <string.h>
1.1 djm 26:
27: const EVP_MD *evp_ssh_sha256(void);
28:
29: static int
30: ssh_sha256_init(EVP_MD_CTX *ctxt)
31: {
1.6 ! djm 32: SHA256Init(ctxt->md_data);
1.1 djm 33: return (1);
34: }
35:
36: static int
37: ssh_sha256_update(EVP_MD_CTX *ctxt, const void *data, unsigned long len)
38: {
1.6 ! djm 39: SHA256Update(ctxt->md_data, data, len);
1.1 djm 40: return (1);
41: }
42:
43: static int
44: ssh_sha256_final(EVP_MD_CTX *ctxt, unsigned char *digest)
45: {
1.6 ! djm 46: SHA256Final(digest, ctxt->md_data);
1.1 djm 47: return (1);
48: }
49:
50: static int
51: ssh_sha256_cleanup(EVP_MD_CTX *ctxt)
52: {
1.6 ! djm 53: memset(ctxt->md_data, 0, sizeof(SHA2_CTX));
1.1 djm 54: return (1);
55: }
56:
57: const EVP_MD *
58: evp_ssh_sha256(void)
59: {
60: static EVP_MD ssh_sha256;
61:
62: memset(&ssh_sha256, 0, sizeof(ssh_sha256));
63: ssh_sha256.type = NID_undef;
64: ssh_sha256.md_size = SHA256_DIGEST_LENGTH;
65: ssh_sha256.init = ssh_sha256_init;
66: ssh_sha256.update = ssh_sha256_update;
67: ssh_sha256.final = ssh_sha256_final;
68: ssh_sha256.cleanup = ssh_sha256_cleanup;
69: ssh_sha256.block_size = SHA256_BLOCK_LENGTH;
1.6 ! djm 70: ssh_sha256.ctx_size = sizeof(SHA2_CTX);
1.1 djm 71:
72: return (&ssh_sha256);
73: }