X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/ba6e6b64033b1f9de49feccb5c9cd438354481f7..0f00dc4c8eb47e67bc0f148c2dd109f73a451e0a:/tlsprf.h

diff --git a/tlsprf.h b/tlsprf.h
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-/* -*-c-*-
- *
- * $Id: tlsprf.h,v 1.2 2004/04/08 01:36:15 mdw Exp $
- *
- * The TLS pseudo-random function
- *
- * (c) 2001 Straylight/Edgeware
- */
-
-/*----- Licensing notice --------------------------------------------------*
- *
- * This file is part of Catacomb.
- *
- * Catacomb is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Library General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * Catacomb is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with Catacomb; if not, write to the Free
- * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- */
-
-#ifndef CATACOMB_TLSPRF_H
-#define CATACOMB_TLSPRF_H
-
-#ifdef __cplusplus
-  extern "C" {
-#endif
-
-/*----- Header files ------------------------------------------------------*/
-
-#ifndef CATACOMB_GMAC_H
-#  include "gmac.h"
-#endif
-
-#ifndef CATACOMB_GRAND_H
-#  include "grand.h"
-#endif
-
-/*----- Data structures ---------------------------------------------------*/
-
-typedef struct tlsdx_ctx {
-  gmac *k;				/* The MAC key to use */
-  size_t hashsz;			/* Size of hash outputs */
-  ghash *i, *o;				/* Inner and outer hash contexts */
-  const octet *sd;			/* Pointer to seed buffer */
-  size_t sdsz;				/* Size of the seed buffer */
-  octet *p;				/* Pointer to buffered output */
-  size_t sz;				/* Bytes remaining in buffer */
-  octet *ai;				/* Pointer to inner result */
-} tlsdx_ctx;
-
-typedef struct tlsprf_ctx {
-  tlsdx_ctx px, py;
-} tlsprf_ctx;
-
-/*----- The data expansion function ---------------------------------------*/
-
-/* --- @tlsdx_init@ --- *
- *
- * Arguments:	@tlsdx_ctx *c@ = pointer to a context
- *		@gmac *m@ = pointer to a generic MAC instance
- *		@const void *sd@ = pointer to the seed block
- *		@size_t sdsz@ = size of the seed block
- *
- * Returns:	---
- *
- * Use:		Initializes a context for the TLS data expansion function.
- *		This doesn't take ownership of the MAC instance or the seed
- *		memory, nor does it allocate copies.
- */
-
-extern void tlsdx_init(tlsdx_ctx */*c*/, gmac */*m*/,
-		       const void */*sd*/, size_t /*sdsz*/);
-
-/* --- @tlsdx_encrypt@ --- *
- *
- * Arguments:	@tlsdx_ctx *c@ = pointer to a context
- *		@const void *src@ = pointer to source data
- *		@void *dest@ = pointer to destination buffer
- *		@size_t sz@ = size of buffer
- *
- * Returns:	---
- *
- * Use:		Encrypts data using the TLS data expansion function.  If the
- *		destination pointer is null, the generator is spun and no
- *		output is produced; if the source pointer is null, raw output
- *		from the generator is written; otherwise, the source data is
- *		XORed with the generator output.
- */
-
-extern void tlsdx_encrypt(tlsdx_ctx */*c*/, const void */*src*/,
-			  void */*dest*/, size_t /*sz*/);
-
-/* --- @tlsdx_free@ --- *
- *
- * Arguments:	@tlsdx_ctx *c@ = pointer to the context block
- *
- * Returns:	---
- *
- * Use:		Frees a context for the TLS data expansion function
- */
-
-extern void tlsdx_free(tlsdx_ctx */*c*/);
-
-/* ---@tlsdx_rand@ --- *
- *
- * Arguments:	@const gcmac *mc@ = MAC function to use
- *		@const void *k@ = pointer to the key material
- *		@size_t ksz@ = size of the key material
- *		@const void *sd@ = pointer to the seed material
- *		@size_t sdsz@ = size of the seed material
- *
- * Returns:	Pointer to generic random number generator interface.
- *
- * Use:		Creates a generic generator which does TLS data expansion.
- */
-
-extern grand *tlsdx_rand(const gcmac */*mc*/,
-			 const void */*k*/, size_t /*ksz*/,
-			 const void */*sd*/, size_t /*sdsz*/);
-
-/* --- The actual very paranoid PRF ---------------------------------------*/
-
-/* --- @tlsprf_init@ --- *
- *
- * Arguments:	@tlsprf_ctx *c@ = pointer to context block
- *		@const gcmac *mcx, *mcy@ = left and right MAC functions
- *		@const void *k@ = pointer to the key material
- *		@size_t ksz@ = size of the key material
- *		@const void *sd@ = pointer to the seed material
- *		@size_t sdsz@ = size of the seed material
- *
- * Returns:	---
- *
- * Use:		Initializes a TLS PRF context.
- */
-
-extern void tlsprf_init(tlsprf_ctx */*c*/,
-			const gcmac */*mcx*/, const gcmac */*mcy*/,
-			const void */*k*/, size_t /*ksz*/,
-			const void */*sd*/, size_t /*sdsz*/);
-
-/* --- @tlsprf_encrypt@ --- *
- *
- * Arguments:	@tlsprf_ctx *c@ = pointer to a context
- *		@const void *src@ = pointer to source data
- *		@void *dest@ = pointer to destination buffer
- *		@size_t sz@ = size of buffer
- *
- * Returns:	---
- *
- * Use:		Encrypts data using the TLS pseudo-random function.  If the
- *		destination pointer is null, the generator is spun and no
- *		output is produced; if the source pointer is null, raw output
- *		from the generator is written; otherwise, the source data is
- *		XORed with the generator output.
- */
-
-extern void tlsprf_encrypt(tlsprf_ctx */*c*/,
-			   const void */*src*/, void */*dest*/,
-			   size_t /*sz*/);
-
-/* --- @tlsprf_free@ --- *
- *
- * Arguments:	@tlsprf_ctx *c@ = pointer to a context
- *
- * Returns:	---
- *
- * Use:		Frees a TLS PRF context.
- */
-
-extern void tlsprf_free(tlsprf_ctx */*c*/);
-
-/* ---@tlsprf_rand@ --- *
- *
- * Arguments:	@const gcmac *mcx, *mcy@ = MAC function to use
- *		@const void *k@ = pointer to the key material
- *		@size_t ksz@ = size of the key material
- *		@const void *sd@ = pointer to the seed material
- *		@size_t sdsz@ = size of the seed material
- *
- * Returns:	Pointer to generic random number generator interface.
- *
- * Use:		Creates a generic generator which does TLS data expansion.
- */
-
-extern grand *tlsprf_rand(const gcmac */*mcx*/, const gcmac */*mcy*/,
-			  const void */*k*/, size_t /*ksz*/,
-			  const void */*sd*/, size_t /*sdsz*/);
-
-/*----- That's all, folks -------------------------------------------------*/
-
-#ifdef __cplusplus
-  }
-#endif
-
-#endif