00001 /* 00002 * Example RSA key generation program 00003 * 00004 * Copyright (C) 2006-2007 Christophe Devine 00005 * 00006 * This program is free software; you can redistribute it and/or modify 00007 * it under the terms of the GNU General Public License as published by 00008 * the Free Software Foundation; either version 2 of the License, or 00009 * (at your option) any later version. 00010 * 00011 * This program is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 * GNU General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU General Public License along 00017 * with this program; if not, write to the Free Software Foundation, Inc., 00018 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 00019 */ 00020 00021 #ifndef _CRT_SECURE_NO_DEPRECATE 00022 #define _CRT_SECURE_NO_DEPRECATE 1 00023 #endif 00024 00025 #include <stdio.h> 00026 00027 #include "xyssl/havege.h" 00028 #include "xyssl/bignum.h" 00029 #include "xyssl/x509.h" 00030 #include "xyssl/rsa.h" 00031 00032 #define KEY_SIZE 1024 00033 #define EXPONENT 65537 00034 00035 int main( void ) 00036 { 00037 int ret; 00038 rsa_context rsa; 00039 havege_state hs; 00040 FILE *fpub = NULL; 00041 FILE *fpriv = NULL; 00042 x509_raw cert; 00043 00044 printf( "\n . Seeding the random number generator..." ); 00045 fflush( stdout ); 00046 00047 havege_init( &hs ); 00048 00049 printf( " ok\n . Generating the RSA key [ %d-bit ]...", KEY_SIZE ); 00050 fflush( stdout ); 00051 00052 rsa_init( &rsa, RSA_PKCS_V15, 0, havege_rand, &hs ); 00053 00054 if( ( ret = rsa_gen_key( &rsa, KEY_SIZE, EXPONENT ) ) != 0 ) 00055 { 00056 printf( " failed\n ! rsa_gen_key returned %d\n\n", ret ); 00057 goto exit; 00058 } 00059 00060 printf( " ok\n . Exporting the public key in rsa_pub.txt...." ); 00061 fflush( stdout ); 00062 00063 if( ( fpub = fopen( "rsa_pub.txt", "wb+" ) ) == NULL ) 00064 { 00065 printf( " failed\n ! could not open rsa_pub.txt for writing\n\n" ); 00066 ret = 1; 00067 goto exit; 00068 } 00069 00070 if( ( ret = mpi_write_file( "N = ", &rsa.N, 16, fpub ) ) != 0 || 00071 ( ret = mpi_write_file( "E = ", &rsa.E, 16, fpub ) ) != 0 ) 00072 { 00073 printf( " failed\n ! mpi_write_file returned %d\n\n", ret ); 00074 goto exit; 00075 } 00076 00077 printf( " ok\n . Exporting the private key in rsa_priv.txt..." ); 00078 fflush( stdout ); 00079 00080 if( ( fpriv = fopen( "rsa_priv.txt", "wb+" ) ) == NULL ) 00081 { 00082 printf( " failed\n ! could not open rsa_priv.txt for writing\n" ); 00083 ret = 1; 00084 goto exit; 00085 } 00086 00087 if( ( ret = mpi_write_file( "N = " , &rsa.N , 16, fpriv ) ) != 0 || 00088 ( ret = mpi_write_file( "E = " , &rsa.E , 16, fpriv ) ) != 0 || 00089 ( ret = mpi_write_file( "D = " , &rsa.D , 16, fpriv ) ) != 0 || 00090 ( ret = mpi_write_file( "P = " , &rsa.P , 16, fpriv ) ) != 0 || 00091 ( ret = mpi_write_file( "Q = " , &rsa.Q , 16, fpriv ) ) != 0 || 00092 ( ret = mpi_write_file( "DP = ", &rsa.DP, 16, fpriv ) ) != 0 || 00093 ( ret = mpi_write_file( "DQ = ", &rsa.DQ, 16, fpriv ) ) != 0 || 00094 ( ret = mpi_write_file( "QP = ", &rsa.QP, 16, fpriv ) ) != 0 ) 00095 { 00096 printf( " failed\n ! mpi_write_file returned %d\n\n", ret ); 00097 goto exit; 00098 } 00099 /* 00100 printf( " ok\n . Generating the certificate..." ); 00101 00102 x509write_init_raw( &cert ); 00103 x509write_add_pubkey( &cert, &rsa ); 00104 x509write_add_subject( &cert, "CN='localhost'" ); 00105 x509write_add_validity( &cert, "2007-09-06 17:00:32", 00106 "2010-09-06 17:00:32" ); 00107 x509write_create_selfsign( &cert, &rsa ); 00108 x509write_crtfile( &cert, "cert.der", X509_OUTPUT_DER ); 00109 x509write_crtfile( &cert, "cert.pem", X509_OUTPUT_PEM ); 00110 x509write_free_raw( &cert ); 00111 */ 00112 printf( " ok\n\n" ); 00113 00114 exit: 00115 00116 if( fpub != NULL ) 00117 fclose( fpub ); 00118 00119 if( fpriv != NULL ) 00120 fclose( fpriv ); 00121 00122 rsa_free( &rsa ); 00123 00124 #ifdef WIN32 00125 printf( " Press Enter to exit this program.\n" ); 00126 fflush( stdout ); getchar(); 00127 #endif 00128 00129 return( ret ); 00130 }