1*fb9475d6Sderaadt /* $OpenBSD: prf.h,v 1.10 2004/04/15 18:39:26 deraadt Exp $ */ 201f1f88eSniklas /* $EOM: prf.h,v 1.1 1998/07/11 20:06:22 provos Exp $ */ 32040585eSniklas 42040585eSniklas /* 52040585eSniklas * Copyright (c) 1998 Niels Provos. All rights reserved. 642af7185Sniklas * Copyright (c) 2001 Niklas Hallqvist. All rights reserved. 72040585eSniklas * 82040585eSniklas * Redistribution and use in source and binary forms, with or without 92040585eSniklas * modification, are permitted provided that the following conditions 102040585eSniklas * are met: 112040585eSniklas * 1. Redistributions of source code must retain the above copyright 122040585eSniklas * notice, this list of conditions and the following disclaimer. 132040585eSniklas * 2. Redistributions in binary form must reproduce the above copyright 142040585eSniklas * notice, this list of conditions and the following disclaimer in the 152040585eSniklas * documentation and/or other materials provided with the distribution. 162040585eSniklas * 172040585eSniklas * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 182040585eSniklas * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 192040585eSniklas * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 202040585eSniklas * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 212040585eSniklas * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 222040585eSniklas * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232040585eSniklas * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242040585eSniklas * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252040585eSniklas * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 262040585eSniklas * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272040585eSniklas */ 282040585eSniklas 292040585eSniklas /* 302040585eSniklas * This code was written under funding by Ericsson Radio Systems. 312040585eSniklas */ 322040585eSniklas 332040585eSniklas #ifndef _PRF_H_ 342040585eSniklas #define _PRF_H_ 352040585eSniklas 362040585eSniklas /* Enumeration of possible PRF - Pseudo-Random Functions. */ 372040585eSniklas enum prfs { 3817120c27Sderaadt PRF_HMAC = 0 /* No PRFs in drafts, this is the default */ 392040585eSniklas }; 402040585eSniklas 412040585eSniklas struct prf { 422040585eSniklas enum prfs type; /* Type of PRF */ 432040585eSniklas void *prfctx; /* Context for PRF */ 442040585eSniklas u_int8_t blocksize; /* The blocksize of PRF */ 452040585eSniklas void (*Init) (void *); 462040585eSniklas void (*Update) (void *, unsigned char *, unsigned int); 472040585eSniklas void (*Final) (unsigned char *, void *); 482040585eSniklas }; 492040585eSniklas 502040585eSniklas struct prf_hash_ctx { 512040585eSniklas struct hash *hash; /* Hash type to use */ 522040585eSniklas void *ctx, *ctx2; /* Contexts we need for later */ 532040585eSniklas }; 542040585eSniklas 55f1d529f7Sho struct prf *prf_alloc(enum prfs, int, unsigned char *, unsigned int); 562040585eSniklas void prf_free(struct prf *); 572040585eSniklas 582040585eSniklas #endif /* _PRF_H_ */ 59