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Annotation of src/usr.bin/ssh/hmac.c, Revision 1.2.2.1

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:  * 3. All advertising materials mentioning features or use of this software
                     13:  *    must display the following acknowledgement:
                     14:  *      This product includes software developed by Markus Friedl.
                     15:  * 4. The name of the author may not be used to endorse or promote products
                     16:  *    derived from this software without specific prior written permission.
                     17:  *
                     18:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     19:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     20:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     21:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
                     22:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
                     23:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
                     24:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
                     25:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
                     26:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
                     27:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                     28:  */
                     29:
                     30: #include "includes.h"
1.2.2.1 ! jason      31: RCSID("$OpenBSD: hmac.c,v 1.3 2000/06/20 01:39:41 markus Exp $");
1.1       markus     32:
                     33: #include "xmalloc.h"
                     34: #include "ssh.h"
                     35: #include "getput.h"
                     36:
1.2       markus     37: #include <openssl/hmac.h>
1.1       markus     38:
                     39: unsigned char *
                     40: hmac(
                     41:     EVP_MD *evp_md,
                     42:     unsigned int seqno,
                     43:     unsigned char *data, int datalen,
                     44:     unsigned char *key, int keylen)
                     45: {
                     46:        HMAC_CTX c;
                     47:        static unsigned char m[EVP_MAX_MD_SIZE];
                     48:        unsigned char b[4];
                     49:
                     50:        if (key == NULL)
                     51:                fatal("hmac: no key");
                     52:        HMAC_Init(&c, key, keylen, evp_md);
                     53:        PUT_32BIT(b, seqno);
                     54:        HMAC_Update(&c, b, sizeof b);
                     55:        HMAC_Update(&c, data, datalen);
                     56:        HMAC_Final(&c, m, NULL);
                     57:        HMAC_cleanup(&c);
                     58:        return(m);
                     59: }