134 lines
4 KiB
C
134 lines
4 KiB
C
/*
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* Example RSA key generation program
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*
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* Copyright (C) 2006-2010, Brainspark B.V.
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*
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* This file is part of PolarSSL (http://www.polarssl.org)
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* Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef _CRT_SECURE_NO_DEPRECATE
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#define _CRT_SECURE_NO_DEPRECATE 1
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#endif
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#include <stdio.h>
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#include "polarssl/havege.h"
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#include "polarssl/bignum.h"
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#include "polarssl/x509.h"
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#include "polarssl/rsa.h"
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#define KEY_SIZE 1024
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#define EXPONENT 65537
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int main( void )
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{
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int ret;
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rsa_context rsa;
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havege_state hs;
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FILE *fpub = NULL;
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FILE *fpriv = NULL;
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printf( "\n . Seeding the random number generator..." );
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fflush( stdout );
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havege_init( &hs );
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printf( " ok\n . Generating the RSA key [ %d-bit ]...", KEY_SIZE );
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fflush( stdout );
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rsa_init( &rsa, RSA_PKCS_V15, 0 );
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if( ( ret = rsa_gen_key( &rsa, havege_rand, &hs, KEY_SIZE, EXPONENT ) ) != 0 )
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{
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printf( " failed\n ! rsa_gen_key returned %d\n\n", ret );
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goto exit;
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}
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printf( " ok\n . Exporting the public key in rsa_pub.txt...." );
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fflush( stdout );
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if( ( fpub = fopen( "rsa_pub.txt", "wb+" ) ) == NULL )
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{
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printf( " failed\n ! could not open rsa_pub.txt for writing\n\n" );
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ret = 1;
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goto exit;
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}
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if( ( ret = mpi_write_file( "N = ", &rsa.N, 16, fpub ) ) != 0 ||
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( ret = mpi_write_file( "E = ", &rsa.E, 16, fpub ) ) != 0 )
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{
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printf( " failed\n ! mpi_write_file returned %d\n\n", ret );
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goto exit;
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}
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printf( " ok\n . Exporting the private key in rsa_priv.txt..." );
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fflush( stdout );
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if( ( fpriv = fopen( "rsa_priv.txt", "wb+" ) ) == NULL )
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{
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printf( " failed\n ! could not open rsa_priv.txt for writing\n" );
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ret = 1;
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goto exit;
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}
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if( ( ret = mpi_write_file( "N = " , &rsa.N , 16, fpriv ) ) != 0 ||
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( ret = mpi_write_file( "E = " , &rsa.E , 16, fpriv ) ) != 0 ||
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( ret = mpi_write_file( "D = " , &rsa.D , 16, fpriv ) ) != 0 ||
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( ret = mpi_write_file( "P = " , &rsa.P , 16, fpriv ) ) != 0 ||
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( ret = mpi_write_file( "Q = " , &rsa.Q , 16, fpriv ) ) != 0 ||
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( ret = mpi_write_file( "DP = ", &rsa.DP, 16, fpriv ) ) != 0 ||
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( ret = mpi_write_file( "DQ = ", &rsa.DQ, 16, fpriv ) ) != 0 ||
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( ret = mpi_write_file( "QP = ", &rsa.QP, 16, fpriv ) ) != 0 )
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{
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printf( " failed\n ! mpi_write_file returned %d\n\n", ret );
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goto exit;
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}
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/*
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printf( " ok\n . Generating the certificate..." );
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x509write_init_raw( &cert );
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x509write_add_pubkey( &cert, &rsa );
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x509write_add_subject( &cert, "CN='localhost'" );
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x509write_add_validity( &cert, "2007-09-06 17:00:32",
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"2010-09-06 17:00:32" );
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x509write_create_selfsign( &cert, &rsa );
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x509write_crtfile( &cert, "cert.der", X509_OUTPUT_DER );
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x509write_crtfile( &cert, "cert.pem", X509_OUTPUT_PEM );
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x509write_free_raw( &cert );
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*/
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printf( " ok\n\n" );
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exit:
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if( fpub != NULL )
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fclose( fpub );
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if( fpriv != NULL )
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fclose( fpriv );
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rsa_free( &rsa );
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#ifdef WIN32
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printf( " Press Enter to exit this program.\n" );
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fflush( stdout ); getchar();
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#endif
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return( ret );
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}
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