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55 lines
1.9 KiB
C
55 lines
1.9 KiB
C
/*
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* Copyright (c) 2000 Markus Friedl. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "includes.h"
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RCSID("$OpenBSD: hmac.c,v 1.4 2000/09/07 20:27:51 deraadt Exp $");
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#include "xmalloc.h"
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#include "ssh.h"
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#include "getput.h"
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#include <openssl/hmac.h>
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unsigned char *
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hmac(
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EVP_MD *evp_md,
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unsigned int seqno,
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unsigned char *data, int datalen,
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unsigned char *key, int keylen)
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{
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HMAC_CTX c;
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static unsigned char m[EVP_MAX_MD_SIZE];
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unsigned char b[4];
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if (key == NULL)
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fatal("hmac: no key");
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HMAC_Init(&c, key, keylen, evp_md);
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PUT_32BIT(b, seqno);
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HMAC_Update(&c, b, sizeof b);
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HMAC_Update(&c, data, datalen);
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HMAC_Final(&c, m, NULL);
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HMAC_cleanup(&c);
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return(m);
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}
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