apps/genrsa.c

   1 /* apps/genrsa.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #ifndef NO_RSA
  60 #include <stdio.h>
  61 #include <string.h>
  62 #include <sys/types.h>
  63 #include <sys/stat.h>
  64 #include "apps.h"
  65 #include <openssl/bio.h>
  66 #include <openssl/err.h>
  67 #include <openssl/bn.h>
  68 #include <openssl/rsa.h>
  69 #include <openssl/evp.h>
  70 #include <openssl/x509.h>
  71 #include <openssl/pem.h>
  72
  73 #define DEFBITS 512
  74 #undef PROG
  75 #define PROG genrsa_main
  76
  77 static void MS_CALLBACK genrsa_cb(int p, int n, void *arg);
  78 int MAIN(int argc, char **argv)
  79         {
  80         int ret=1;
  81         RSA *rsa=NULL;
  82         int i,num=DEFBITS;
  83         long l;
  84         EVP_CIPHER *enc=NULL;
  85         unsigned long f4=RSA_F4;
  86         char *outfile=NULL;
  87         char *inrand=NULL;
  88         BIO *out=NULL;
  89
  90         apps_startup();
  91
  92         if (bio_err == NULL)
  93                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
  94                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
  95         if ((out=BIO_new(BIO_s_file())) == NULL)
  96                 {
  97                 BIO_printf(bio_err,"unable to create BIO for output\n");
  98                 goto err;
  99                 }
 100
 101         argv++;
 102         argc--;
 103         for (;;)
 104                 {
 105                 if (argc <= 0) break;
 106                 if (strcmp(*argv,"-out") == 0)
 107                         {
 108                         if (--argc < 1) goto bad;
 109                         outfile= *(++argv);
 110                         }
 111                 else if (strcmp(*argv,"-3") == 0)
 112                         f4=3;
 113                 else if (strcmp(*argv,"-F4") == 0)
 114                         f4=RSA_F4;
 115                 else if (strcmp(*argv,"-rand") == 0)
 116                         {
 117                         if (--argc < 1) goto bad;
 118                         inrand= *(++argv);
 119                         }
 120 #ifndef NO_DES
 121                 else if (strcmp(*argv,"-des") == 0)
 122                         enc=EVP_des_cbc();
 123                 else if (strcmp(*argv,"-des3") == 0)
 124                         enc=EVP_des_ede3_cbc();
 125 #endif
 126 #ifndef NO_IDEA
 127                 else if (strcmp(*argv,"-idea") == 0)
 128                         enc=EVP_idea_cbc();
 129 #endif
 130                 else
 131                         break;
 132                 argv++;
 133                 argc--;
 134                 }
 135         if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0)))
 136                 {
 137 bad:
 138                 BIO_printf(bio_err,"usage: genrsa [args] [numbits]\n");
 139                 BIO_printf(bio_err," -des      - encrypt the generated key with DES in cbc mode\n");
 140                 BIO_printf(bio_err," -des3     - encrypt the generated key with DES in ede cbc mode (168 bit key)\n");
 141 #ifndef NO_IDEA
 142                 BIO_printf(bio_err," -idea     - encrypt the generated key with IDEA in cbc mode\n");
 143 #endif
 144                 BIO_printf(bio_err," -out file - output the key to 'file\n");
 145                 BIO_printf(bio_err," -f4       - use F4 (0x10001) for the E value\n");
 146                 BIO_printf(bio_err," -3        - use 3 for the E value\n");
 147                 BIO_printf(bio_err," -rand file:file:...\n");
 148                 BIO_printf(bio_err,"           - load the file (or the files in the directory) into\n");
 149                 BIO_printf(bio_err,"             the random number generator\n");
 150                 goto err;
 151                 }
 152
 153         ERR_load_crypto_strings();
 154         if (outfile == NULL)
 155                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 156         else
 157                 {
 158                 if (BIO_write_filename(out,outfile) <= 0)
 159                         {
 160                         perror(outfile);
 161                         goto err;
 162                         }
 163                 }
 164
 165         if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL)
 166                 {
 167                 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
 168                 }
 169         if (inrand != NULL)
 170                 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 171                         app_RAND_load_files(inrand));
 172
 173         BIO_printf(bio_err,"Generating RSA private key, %d bit long modulus\n",
 174                 num);
 175         rsa=RSA_generate_key(num,f4,genrsa_cb,bio_err);
 176
 177         app_RAND_write_file(NULL, bio_err);
 178
 179         if (rsa == NULL) goto err;
 180
 181         /* We need to do the following for when the base number size is <
 182          * long, esp windows 3.1 :-(. */
 183         l=0L;
 184         for (i=0; i<rsa->e->top; i++)
 185                 {
 186 #ifndef SIXTY_FOUR_BIT
 187                 l<<=BN_BITS4;
 188                 l<<=BN_BITS4;
 189 #endif
 190                 l+=rsa->e->d[i];
 191                 }
 192         BIO_printf(bio_err,"e is %ld (0x%lX)\n",l,l);
 193         if (!PEM_write_bio_RSAPrivateKey(out,rsa,enc,NULL,0,NULL,NULL))
 194                 goto err;
 195
 196         ret=0;
 197 err:
 198         if (rsa != NULL) RSA_free(rsa);
 199         if (out != NULL) BIO_free(out);
 200         if (ret != 0)
 201                 ERR_print_errors(bio_err);
 202         EXIT(ret);
 203         }
 204
 205 static void MS_CALLBACK genrsa_cb(int p, int n, void *arg)
 206         {
 207         char c='*';
 208
 209         if (p == 0) c='.';
 210         if (p == 1) c='+';
 211         if (p == 2) c='*';
 212         if (p == 3) c='\n';
 213         BIO_write((BIO *)arg,&c,1);
 214         (void)BIO_flush((BIO *)arg);
 215 #ifdef LINT
 216         p=n;
 217 #endif
 218         }
 219 #else /* !NO_RSA */
 220
 221 # if PEDANTIC
 222 static void *dummy=&dummy;
 223 # endif
 224
 225 #endif