X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/898a4e2555438ff8adb08b4d82690d08715e1048..b817bfc642225b8c3c0b6a7e42d1fb949b61a606:/oaep.h

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-/* -*-c-*-
- *
- * $Id: oaep.h,v 1.1 2000/07/01 11:18:30 mdw Exp $
- *
- * Optimal asymmetric encryption packing
- *
- * (c) 2000 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.
- */
-
-/*----- Revision history --------------------------------------------------* 
- *
- * $Log: oaep.h,v $
- * Revision 1.1  2000/07/01 11:18:30  mdw
- * Support for Optimal Asymmetric Encryption Padding.
- *
- */
-
-/*----- Notes on OAEP -----------------------------------------------------*
- *
- * Applying OAEP before RSA encryption renders the construction plaintext-
- * aware under the random oracle model.  This is probably a good thing.  OAEP
- * was designed by Bellare and Rogaway.  This particular variant is the one
- * specified in PKCS#1 version 2.0.  It's apparently not compatible with the
- * OAEP used in the SET protocols.
- */
-
-#ifndef CATACOMB_OAEP_H
-#define CATACOMB_OAEP_H
-
-#ifdef __cplusplus
-  extern "C" {
-#endif
-
-/*----- Header files ------------------------------------------------------*/
-
-#include <mLib/bits.h>
-#include <mLib/dstr.h>
-
-#ifndef CATACOMB_GCIPHER_H
-#  include "gcipher.h"
-#endif
-
-#ifndef CATACOMB_GHASH_H
-#  include "ghash.h"
-#endif
-
-#ifndef CATACOMB_GRAND_H
-#  include "grand.h"
-#endif
-
-/*----- Data structures ---------------------------------------------------*/
-
-typedef struct oaep {
-  const gccipher *cc;			/* Cipher class for masking */
-  const gchash *ch;			/* Hash class for parameter block */
-  grand *r;				/* Random number source */
-  const void *ep;			/* Encoding parameters block */
-  size_t epsz;				/* Size of the parameter block */
-} oaep;
-
-/*----- Functions provided ------------------------------------------------*/
-
-/* --- @oaep_encode@ --- *
- *
- * Arguments:	@const void *msg@ = pointer to message data
- *		@size_t msz@ = size of message data
- *		@void *buf@ = pointer to output buffer
- *		@size_t sz@ = size of the output buffer
- *		@void *p@ = pointer to OAEP parameter block
- *
- * Returns:	Zero if all went well, negative on failure.
- *
- * Use:		Implements the operation @EME-OAEP-ENCODE@, as defined in
- *		PKCS#1 v. 2.0 (RFC2437).
- */
-
-extern int oaep_encode(const void */*msg*/, size_t /*msz*/,
-		       void */*buf*/, size_t /*sz*/, void */*p*/);
-
-/* --- @oaep_decode@ --- *
- *
- * Arguments:	@const void *buf@ = pointer to encoded buffer
- *		@size_t sz@ = size of the encoded buffer
- *		@dstr *d@ = pointer to destination string
- *		@void *p@ = pointer to OAEP parameter block
- *
- * Returns:	The length of the output string if successful, negative on
- *		failure.
- *
- * Use:		Implements the operation @EME-OAEP-DECODE@, as defined in
- *		PKCS#1 v. 2.0 (RFC2437).
- */
-
-extern int oaep_decode(const void */*buf*/, size_t /*sz*/,
-		       dstr */*d*/, void */*p*/);
-
-/*----- That's all, folks -------------------------------------------------*/
-
-#ifdef __cplusplus
-  }
-#endif
-
-#endif