1 /* $OpenBSD: md-sha256.c,v 1.4 2006/07/22 20:48:23 stevesk Exp $ */
3 * Copyright (c) 2005 Damien Miller <djm@openbsd.org>
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.
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.
18 /* EVP wrapper for SHA256 */
21 #include <openssl/opensslv.h>
23 #if !defined(HAVE_EVP_SHA256) && (OPENSSL_VERSION_NUMBER >= 0x00907000L)
26 #include <openssl/evp.h>
27 #ifdef HAVE_SHA256_UPDATE
30 # elif defined(HAVE_CRYPTO_SHA2_H)
31 # include <crypto/sha2.h>
35 const EVP_MD *evp_ssh_sha256(void);
38 ssh_sha256_init(EVP_MD_CTX *ctxt)
40 SHA256_Init(ctxt->md_data);
45 ssh_sha256_update(EVP_MD_CTX *ctxt, const void *data, unsigned long len)
47 SHA256_Update(ctxt->md_data, data, len);
52 ssh_sha256_final(EVP_MD_CTX *ctxt, unsigned char *digest)
54 SHA256_Final(digest, ctxt->md_data);
59 ssh_sha256_cleanup(EVP_MD_CTX *ctxt)
61 memset(ctxt->md_data, 0, sizeof(SHA256_CTX));
68 static EVP_MD ssh_sha256;
70 memset(&ssh_sha256, 0, sizeof(ssh_sha256));
71 ssh_sha256.type = NID_undef;
72 ssh_sha256.md_size = SHA256_DIGEST_LENGTH;
73 ssh_sha256.init = ssh_sha256_init;
74 ssh_sha256.update = ssh_sha256_update;
75 ssh_sha256.final = ssh_sha256_final;
76 ssh_sha256.cleanup = ssh_sha256_cleanup;
77 ssh_sha256.block_size = SHA256_BLOCK_LENGTH;
78 ssh_sha256.ctx_size = sizeof(SHA256_CTX);
83 #endif /* !defined(HAVE_EVP_SHA256) && (OPENSSL_VERSION_NUMBER >= 0x00907000L) */