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/**
* \file rsa.h
*
* \brief The RSA public-key cryptosystem
*
* Copyright (C) 2006-2010, Brainspark B.V.
*
* This file is part of PolarSSL (http://www.polarssl.org)
* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef TPMRSA_H
#define TPMRSA_H
#include "tcg.h"
#include <polarssl/bignum.h>
/* tpm software key */
typedef struct
{
size_t len; /*!< size(N) in chars */
mpi N; /*!< public modulus */
mpi E; /*!< public exponent */
mpi RN; /*!< cached R^2 mod N */
}
tpmrsa_context;
#define TPMRSA_CTX_INIT { 0, {0, 0, NULL}, {0, 0, NULL}, {0, 0, NULL}}
/* Setup the rsa context using tpm public key data */
void tpmrsa_set_pubkey(tpmrsa_context* ctx,
const unsigned char* key,
int keylen,
const unsigned char* exponent,
int explen);
/* Do rsa public crypto */
TPM_RESULT tpmrsa_pub_encrypt_oaep( tpmrsa_context *ctx,
int (*f_rng)(void *, unsigned char *, size_t),
void *p_rng,
size_t ilen,
const unsigned char *input,
unsigned char *output );
/* free tpmrsa key */
inline void tpmrsa_free( tpmrsa_context *ctx ) {
mpi_free( &ctx->RN ); mpi_free( &ctx->E ); mpi_free( &ctx->N );
}
#endif /* tpmrsa.h */
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