programs/pkey/rsa_genkey.c

   1 /*
   2  *  Example RSA key generation program
   3  *
   4  *  Based on XySSL: Copyright (C) 2006-2008  Christophe Devine
   5  *
   6  *  Copyright (C) 2009  Paul Bakker <polarssl_maintainer at polarssl dot org>
   7  *
   8  *  All rights reserved.
   9  *
  10  *  Redistribution and use in source and binary forms, with or without
  11  *  modification, are permitted provided that the following conditions
  12  *  are met:
  13  *
  14  *    * Redistributions of source code must retain the above copyright
  15  *      notice, this list of conditions and the following disclaimer.
  16  *    * Redistributions in binary form must reproduce the above copyright
  17  *      notice, this list of conditions and the following disclaimer in the
  18  *      documentation and/or other materials provided with the distribution.
  19  *    * Neither the names of PolarSSL or XySSL nor the names of its contributors
  20  *      may be used to endorse or promote products derived from this software
  21  *      without specific prior written permission.
  22  *
  23  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  26  *  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  29  *  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  30  *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35
  36 #ifndef _CRT_SECURE_NO_DEPRECATE
  37 #define _CRT_SECURE_NO_DEPRECATE 1
  38 #endif
  39
  40 #include <stdio.h>
  41
  42 #include "tropicssl/havege.h"
  43 #include "tropicssl/bignum.h"
  44 #include "tropicssl/x509.h"
  45 #include "tropicssl/rsa.h"
  46
  47 #define KEY_SIZE 1024
  48 #define EXPONENT 65537
  49
  50 int main(void)
  51 {
  52         int ret;
  53         rsa_context rsa;
  54         havege_state hs;
  55         FILE *fpub = NULL;
  56         FILE *fpriv = NULL;
  57 /*
  58         x509_raw cert;
  59 */
  60
  61         printf("\n  . Seeding the random number generator...");
  62         fflush(stdout);
  63
  64         havege_init(&hs);
  65
  66         printf(" ok\n  . Generating the RSA key [ %d-bit ]...", KEY_SIZE);
  67         fflush(stdout);
  68
  69         rsa_init(&rsa, RSA_PKCS_V15, 0, havege_rand, &hs);
  70
  71         if ((ret = rsa_gen_key(&rsa, KEY_SIZE, EXPONENT)) != 0) {
  72                 printf(" failed\n  ! rsa_gen_key returned %d\n\n", ret);
  73                 goto exit;
  74         }
  75
  76         printf(" ok\n  . Exporting the public  key in rsa_pub.txt....");
  77         fflush(stdout);
  78
  79         if ((fpub = fopen("rsa_pub.txt", "wb+")) == NULL) {
  80                 printf
  81                     (" failed\n  ! could not open rsa_pub.txt for writing\n\n");
  82                 ret = 1;
  83                 goto exit;
  84         }
  85
  86         if ((ret = mpi_write_file("N = ", &rsa.N, 16, fpub)) != 0 ||
  87             (ret = mpi_write_file("E = ", &rsa.E, 16, fpub)) != 0) {
  88                 printf(" failed\n  ! mpi_write_file returned %d\n\n", ret);
  89                 goto exit;
  90         }
  91
  92         printf(" ok\n  . Exporting the private key in rsa_priv.txt...");
  93         fflush(stdout);
  94
  95         if ((fpriv = fopen("rsa_priv.txt", "wb+")) == NULL) {
  96                 printf
  97                     (" failed\n  ! could not open rsa_priv.txt for writing\n");
  98                 ret = 1;
  99                 goto exit;
 100         }
 101
 102         if ((ret = mpi_write_file("N = ", &rsa.N, 16, fpriv)) != 0 ||
 103             (ret = mpi_write_file("E = ", &rsa.E, 16, fpriv)) != 0 ||
 104             (ret = mpi_write_file("D = ", &rsa.D, 16, fpriv)) != 0 ||
 105             (ret = mpi_write_file("P = ", &rsa.P, 16, fpriv)) != 0 ||
 106             (ret = mpi_write_file("Q = ", &rsa.Q, 16, fpriv)) != 0 ||
 107             (ret = mpi_write_file("DP = ", &rsa.DP, 16, fpriv)) != 0 ||
 108             (ret = mpi_write_file("DQ = ", &rsa.DQ, 16, fpriv)) != 0 ||
 109             (ret = mpi_write_file("QP = ", &rsa.QP, 16, fpriv)) != 0) {
 110                 printf(" failed\n  ! mpi_write_file returned %d\n\n", ret);
 111                 goto exit;
 112         }
 113 /*
 114     printf( " ok\n  . Generating the certificate..." );
 115
 116     x509write_init_raw( &cert );
 117     x509write_add_pubkey( &cert, &rsa );
 118     x509write_add_subject( &cert, "CN='localhost'" );
 119     x509write_add_validity( &cert, "2007-09-06 17:00:32",
 120                                    "2010-09-06 17:00:32" );
 121     x509write_create_selfsign( &cert, &rsa );
 122     x509write_crtfile( &cert, "cert.der", X509_OUTPUT_DER );
 123     x509write_crtfile( &cert, "cert.pem", X509_OUTPUT_PEM );
 124     x509write_free_raw( &cert );
 125 */
 126         printf(" ok\n\n");
 127
 128 exit:
 129
 130         if (fpub != NULL)
 131                 fclose(fpub);
 132
 133         if (fpriv != NULL)
 134                 fclose(fpriv);
 135
 136         rsa_free(&rsa);
 137
 138 #ifdef WIN32
 139         printf("  Press Enter to exit this program.\n");
 140         fflush(stdout);
 141         getchar();
 142 #endif
 143
 144         return (ret);
 145 }