1 /* $OpenBSD: hash.h,v 1.8 2006/06/10 20:10:02 hshoexer Exp $ */ 2 /* $EOM: hash.h,v 1.6 1998/07/25 22:04:36 niklas Exp $ */ 3 4 /* 5 * Copyright (c) 1998 Niels Provos. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 /* 29 * This code was written under funding by Ericsson Radio Systems. 30 */ 31 32 #ifndef _HASH_H_ 33 #define _HASH_H_ 34 35 /* Normal mode hash encapsulation */ 36 37 #define MD5_SIZE 16 38 #define SHA1_SIZE 20 39 #define SHA2_256_SIZE 32 40 #define SHA2_384_SIZE 48 41 #define SHA2_512_SIZE 64 42 #define HASH_MAX SHA2_512_SIZE 43 44 enum hashes { 45 HASH_MD5 = 0, 46 HASH_SHA1, 47 HASH_SHA2_256, 48 HASH_SHA2_384, 49 HASH_SHA2_512 50 }; 51 52 struct hash { 53 enum hashes type; 54 int id; /* ISAKMP/Oakley ID */ 55 u_int8_t hashsize; /* Size of the hash */ 56 void *ctx; /* Pointer to a context, for HMAC ictx */ 57 unsigned char *digest; /* Pointer to a digest */ 58 int ctxsize; 59 void *ctx2; /* Pointer to a 2nd context, for HMAC octx */ 60 void (*Init) (void *); 61 void (*Update) (void *, unsigned char *, unsigned int); 62 void (*Final) (unsigned char *, void *); 63 void (*HMACInit) (struct hash *, unsigned char *, unsigned int); 64 void (*HMACFinal) (unsigned char *, struct hash *); 65 }; 66 67 /* HMAC Hash Encapsulation */ 68 69 #define HMAC_IPAD_VAL 0x36 70 #define HMAC_OPAD_VAL 0x5C 71 #define HMAC_BLOCKLEN 64 72 73 extern struct hash *hash_get(enum hashes); 74 extern void hmac_init(struct hash *, unsigned char *, unsigned int); 75 76 #endif /* _HASH_H_ */ 77