crypto/openssl-0.9.7e/apps/gendh.c

   1 /* apps/gendh.c */
   2 /* obsoleted by dhparam.c */
   3 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   4  * All rights reserved.
   5  *
   6  * This package is an SSL implementation written
   7  * by Eric Young (eay@cryptsoft.com).
   8  * The implementation was written so as to conform with Netscapes SSL.
   9  *
  10  * This library is free for commercial and non-commercial use as long as
  11  * the following conditions are aheared to.  The following conditions
  12  * apply to all code found in this distribution, be it the RC4, RSA,
  13  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  14  * included with this distribution is covered by the same copyright terms
  15  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  16  *
  17  * Copyright remains Eric Young's, and as such any Copyright notices in
  18  * the code are not to be removed.
  19  * If this package is used in a product, Eric Young should be given attribution
  20  * as the author of the parts of the library used.
  21  * This can be in the form of a textual message at program startup or
  22  * in documentation (online or textual) provided with the package.
  23  *
  24  * Redistribution and use in source and binary forms, with or without
  25  * modification, are permitted provided that the following conditions
  26  * are met:
  27  * 1. Redistributions of source code must retain the copyright
  28  *    notice, this list of conditions and the following disclaimer.
  29  * 2. Redistributions in binary form must reproduce the above copyright
  30  *    notice, this list of conditions and the following disclaimer in the
  31  *    documentation and/or other materials provided with the distribution.
  32  * 3. All advertising materials mentioning features or use of this software
  33  *    must display the following acknowledgement:
  34  *    "This product includes cryptographic software written by
  35  *     Eric Young (eay@cryptsoft.com)"
  36  *    The word 'cryptographic' can be left out if the rouines from the library
  37  *    being used are not cryptographic related :-).
  38  * 4. If you include any Windows specific code (or a derivative thereof) from
  39  *    the apps directory (application code) you must include an acknowledgement:
  40  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  43  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  44  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  46  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  *
  54  * The licence and distribution terms for any publically available version or
  55  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  56  * copied and put under another distribution licence
  57  * [including the GNU Public Licence.]
  58  */
  59
  60 #ifndef OPENSSL_NO_DH
  61 #include <stdio.h>
  62 #include <string.h>
  63 #include <sys/types.h>
  64 #include <sys/stat.h>
  65 #include "apps.h"
  66 #include <openssl/bio.h>
  67 #include <openssl/rand.h>
  68 #include <openssl/err.h>
  69 #include <openssl/bn.h>
  70 #include <openssl/dh.h>
  71 #include <openssl/x509.h>
  72 #include <openssl/pem.h>
  73
  74 #define DEFBITS 512
  75 #undef PROG
  76 #define PROG gendh_main
  77
  78 static void MS_CALLBACK dh_cb(int p, int n, void *arg);
  79
  80 int MAIN(int, char **);
  81
  82 int MAIN(int argc, char **argv)
  83         {
  84 #ifndef OPENSSL_NO_ENGINE
  85         ENGINE *e = NULL;
  86 #endif
  87         DH *dh=NULL;
  88         int ret=1,num=DEFBITS;
  89         int g=2;
  90         char *outfile=NULL;
  91         char *inrand=NULL;
  92 #ifndef OPENSSL_NO_ENGINE
  93         char *engine=NULL;
  94 #endif
  95         BIO *out=NULL;
  96
  97         apps_startup();
  98
  99         if (bio_err == NULL)
 100                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 101                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 102
 103         if (!load_config(bio_err, NULL))
 104                 goto end;
 105
 106         argv++;
 107         argc--;
 108         for (;;)
 109                 {
 110                 if (argc <= 0) break;
 111                 if (strcmp(*argv,"-out") == 0)
 112                         {
 113                         if (--argc < 1) goto bad;
 114                         outfile= *(++argv);
 115                         }
 116                 else if (strcmp(*argv,"-2") == 0)
 117                         g=2;
 118         /*      else if (strcmp(*argv,"-3") == 0)
 119                         g=3; */
 120                 else if (strcmp(*argv,"-5") == 0)
 121                         g=5;
 122 #ifndef OPENSSL_NO_ENGINE
 123                 else if (strcmp(*argv,"-engine") == 0)
 124                         {
 125                         if (--argc < 1) goto bad;
 126                         engine= *(++argv);
 127                         }
 128 #endif
 129                 else if (strcmp(*argv,"-rand") == 0)
 130                         {
 131                         if (--argc < 1) goto bad;
 132                         inrand= *(++argv);
 133                         }
 134                 else
 135                         break;
 136                 argv++;
 137                 argc--;
 138                 }
 139         if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0)))
 140                 {
 141 bad:
 142                 BIO_printf(bio_err,"usage: gendh [args] [numbits]\n");
 143                 BIO_printf(bio_err," -out file - output the key to 'file\n");
 144                 BIO_printf(bio_err," -2        - use 2 as the generator value\n");
 145         /*      BIO_printf(bio_err," -3        - use 3 as the generator value\n"); */
 146                 BIO_printf(bio_err," -5        - use 5 as the generator value\n");
 147 #ifndef OPENSSL_NO_ENGINE
 148                 BIO_printf(bio_err," -engine e - use engine e, possibly a hardware device.\n");
 149 #endif
 150                 BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
 151                 BIO_printf(bio_err,"           - load the file (or the files in the directory) into\n");
 152                 BIO_printf(bio_err,"             the random number generator\n");
 153                 goto end;
 154                 }
 155
 156 #ifndef OPENSSL_NO_ENGINE
 157         e = setup_engine(bio_err, engine, 0);
 158 #endif
 159
 160         out=BIO_new(BIO_s_file());
 161         if (out == NULL)
 162                 {
 163                 ERR_print_errors(bio_err);
 164                 goto end;
 165                 }
 166
 167         if (outfile == NULL)
 168                 {
 169                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 170 #ifdef OPENSSL_SYS_VMS
 171                 {
 172                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 173                 out = BIO_push(tmpbio, out);
 174                 }
 175 #endif
 176                 }
 177         else
 178                 {
 179                 if (BIO_write_filename(out,outfile) <= 0)
 180                         {
 181                         perror(outfile);
 182                         goto end;
 183                         }
 184                 }
 185
 186         if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL)
 187                 {
 188                 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
 189                 }
 190         if (inrand != NULL)
 191                 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 192                         app_RAND_load_files(inrand));
 193
 194         BIO_printf(bio_err,"Generating DH parameters, %d bit long safe prime, generator %d\n",num,g);
 195         BIO_printf(bio_err,"This is going to take a long time\n");
 196         dh=DH_generate_parameters(num,g,dh_cb,bio_err);
 197
 198         if (dh == NULL) goto end;
 199
 200         app_RAND_write_file(NULL, bio_err);
 201
 202         if (!PEM_write_bio_DHparams(out,dh))
 203                 goto end;
 204         ret=0;
 205 end:
 206         if (ret != 0)
 207                 ERR_print_errors(bio_err);
 208         if (out != NULL) BIO_free_all(out);
 209         if (dh != NULL) DH_free(dh);
 210         apps_shutdown();
 211         OPENSSL_EXIT(ret);
 212         }
 213
 214 static void MS_CALLBACK dh_cb(int p, int n, void *arg)
 215         {
 216         char c='*';
 217
 218         if (p == 0) c='.';
 219         if (p == 1) c='+';
 220         if (p == 2) c='*';
 221         if (p == 3) c='\n';
 222         BIO_write((BIO *)arg,&c,1);
 223         (void)BIO_flush((BIO *)arg);
 224 #ifdef LINT
 225         p=n;
 226 #endif
 227         }
 228 #endif