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81 lines
2.0 KiB
C
81 lines
2.0 KiB
C
/*
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* Copyright (c) 2005 Damien Miller <djm@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/* EVP wrapper for SHA256 */
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#include "includes.h"
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#ifndef HAVE_EVP_SHA256
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#include <string.h>
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#include <openssl/evp.h>
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#if defined(HAVE_SHA2_H) && defined(HAVE_SHA256_UPDATE)
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# include <sha2.h>
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#endif
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RCSID("$OpenBSD: md-sha256.c,v 1.1 2006/03/07 09:07:40 djm Exp $");
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const EVP_MD *evp_ssh_sha256(void);
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static int
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ssh_sha256_init(EVP_MD_CTX *ctxt)
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{
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SHA256_Init(ctxt->md_data);
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return (1);
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}
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static int
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ssh_sha256_update(EVP_MD_CTX *ctxt, const void *data, unsigned long len)
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{
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SHA256_Update(ctxt->md_data, data, len);
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return (1);
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}
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static int
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ssh_sha256_final(EVP_MD_CTX *ctxt, unsigned char *digest)
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{
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SHA256_Final(digest, ctxt->md_data);
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return (1);
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}
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static int
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ssh_sha256_cleanup(EVP_MD_CTX *ctxt)
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{
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memset(ctxt->md_data, 0, sizeof(SHA256_CTX));
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return (1);
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}
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const EVP_MD *
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evp_ssh_sha256(void)
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{
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static EVP_MD ssh_sha256;
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memset(&ssh_sha256, 0, sizeof(ssh_sha256));
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ssh_sha256.type = NID_undef;
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ssh_sha256.md_size = SHA256_DIGEST_LENGTH;
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ssh_sha256.init = ssh_sha256_init;
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ssh_sha256.update = ssh_sha256_update;
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ssh_sha256.final = ssh_sha256_final;
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ssh_sha256.cleanup = ssh_sha256_cleanup;
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ssh_sha256.block_size = SHA256_BLOCK_LENGTH;
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ssh_sha256.ctx_size = sizeof(SHA256_CTX);
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return (&ssh_sha256);
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}
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#endif /* HAVE_EVP_SHA256 */
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