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Annotation of src/usr.bin/ssh/hmac.c, Revision 1.2.2.2

1.1       markus      1: /*
                      2:  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
                      3:  *
                      4:  * Redistribution and use in source and binary forms, with or without
                      5:  * modification, are permitted provided that the following conditions
                      6:  * are met:
                      7:  * 1. Redistributions of source code must retain the above copyright
                      8:  *    notice, this list of conditions and the following disclaimer.
                      9:  * 2. Redistributions in binary form must reproduce the above copyright
                     10:  *    notice, this list of conditions and the following disclaimer in the
                     11:  *    documentation and/or other materials provided with the distribution.
                     12:  *
                     13:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     14:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     15:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     16:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
                     17:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
                     18:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
                     19:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
                     20:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
                     21:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
                     22:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     23:  */
                     24:
                     25: #include "includes.h"
1.2.2.2 ! jason      26: RCSID("$OpenBSD: hmac.c,v 1.4 2000/09/07 20:27:51 deraadt Exp $");
1.1       markus     27:
                     28: #include "xmalloc.h"
                     29: #include "ssh.h"
                     30: #include "getput.h"
                     31:
1.2       markus     32: #include <openssl/hmac.h>
1.1       markus     33:
                     34: unsigned char *
                     35: hmac(
                     36:     EVP_MD *evp_md,
                     37:     unsigned int seqno,
                     38:     unsigned char *data, int datalen,
                     39:     unsigned char *key, int keylen)
                     40: {
                     41:        HMAC_CTX c;
                     42:        static unsigned char m[EVP_MAX_MD_SIZE];
                     43:        unsigned char b[4];
                     44:
                     45:        if (key == NULL)
                     46:                fatal("hmac: no key");
                     47:        HMAC_Init(&c, key, keylen, evp_md);
                     48:        PUT_32BIT(b, seqno);
                     49:        HMAC_Update(&c, b, sizeof b);
                     50:        HMAC_Update(&c, data, datalen);
                     51:        HMAC_Final(&c, m, NULL);
                     52:        HMAC_cleanup(&c);
                     53:        return(m);
                     54: }