1 /* $OpenBSD: prf.h,v 1.10 2004/04/15 18:39:26 deraadt Exp $ */ 2 /* $EOM: prf.h,v 1.1 1998/07/11 20:06:22 provos Exp $ */ 3 4 /* 5 * Copyright (c) 1998 Niels Provos. All rights reserved. 6 * Copyright (c) 2001 Niklas Hallqvist. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * This code was written under funding by Ericsson Radio Systems. 31 */ 32 33 #ifndef _PRF_H_ 34 #define _PRF_H_ 35 36 /* Enumeration of possible PRF - Pseudo-Random Functions. */ 37 enum prfs { 38 PRF_HMAC = 0 /* No PRFs in drafts, this is the default */ 39 }; 40 41 struct prf { 42 enum prfs type; /* Type of PRF */ 43 void *prfctx; /* Context for PRF */ 44 u_int8_t blocksize; /* The blocksize of PRF */ 45 void (*Init) (void *); 46 void (*Update) (void *, unsigned char *, unsigned int); 47 void (*Final) (unsigned char *, void *); 48 }; 49 50 struct prf_hash_ctx { 51 struct hash *hash; /* Hash type to use */ 52 void *ctx, *ctx2; /* Contexts we need for later */ 53 }; 54 55 struct prf *prf_alloc(enum prfs, int, unsigned char *, unsigned int); 56 void prf_free(struct prf *); 57 58 #endif /* _PRF_H_ */ 59