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