94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/*
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* Copyright (c) 2000, 2001, 2002 Virtual Unlimited, B.V.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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/*!\file dhaes.h
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* \brief DHAES encryption scheme.
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*
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* This code implements the encryption scheme from the paper:
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*
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* "DHAES: An Encryption Scheme Based on the Diffie-Hellman Problem"
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* Michel Abdalla, Mihir Bellare, Phillip Rogaway
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* September 1998
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*
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* \author Bob Deblier <bob.deblier@pandora.be>
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* \ingroup DL_m DL_dh_m
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*/
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#ifndef _DHAES_H
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#define _DHAES_H
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#include "beecrypt.h"
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#include "dldp.h"
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typedef struct
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{
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const dldp_p* param;
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const hashFunction* hash;
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const blockCipher* cipher;
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const keyedHashFunction* mac;
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size_t cipherkeybits;
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size_t mackeybits;
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} dhaes_pParameters;
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typedef struct
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{
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dldp_p param;
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mpnumber pub;
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mpnumber pri;
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hashFunctionContext hash;
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blockCipherContext cipher;
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keyedHashFunctionContext mac;
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size_t cipherkeybits;
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size_t mackeybits;
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} dhaes_pContext;
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#ifdef __cplusplus
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extern "C" {
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#endif
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BEECRYPTAPI
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int dhaes_pUsable(const dhaes_pParameters* params)
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/*@*/;
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BEECRYPTAPI
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int dhaes_pContextInit (dhaes_pContext* ctxt, const dhaes_pParameters* params)
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/*@modifies ctxt @*/;
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BEECRYPTAPI
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int dhaes_pContextInitDecrypt(dhaes_pContext* ctxt, const dhaes_pParameters* params, const mpnumber* pri)
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/*@modifies ctxt @*/;
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BEECRYPTAPI
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int dhaes_pContextInitEncrypt(dhaes_pContext* ctxt, const dhaes_pParameters* params, const mpnumber* pub)
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/*@modifies ctxt @*/;
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BEECRYPTAPI
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int dhaes_pContextFree (dhaes_pContext* ctxt)
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/*@modifies ctxt @*/;
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BEECRYPTAPI
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memchunk* dhaes_pContextEncrypt(dhaes_pContext* ctxt, mpnumber* ephemeralPublicKey, mpnumber* mac, const memchunk* cleartext, randomGeneratorContext* rng)
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/*@modifies ctxt, ephemeralPublicKey, mac @*/;
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BEECRYPTAPI /*@null@*/
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memchunk* dhaes_pContextDecrypt(dhaes_pContext* ctxt, const mpnumber* ephemeralPublicKey, const mpnumber* mac, const memchunk* ciphertext)
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/*@modifies ctxt @*/;
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#ifdef __cplusplus
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}
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#endif
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#endif
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