crypto/openssl-0.9/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 #include <openssl/opensslconf.h>
  61 /* Until the key-gen callbacks are modified to use newer prototypes, we allow
  62  * deprecated functions for openssl-internal code */
  63 #ifdef OPENSSL_NO_DEPRECATED
  64 #undef OPENSSL_NO_DEPRECATED
  65 #endif
  66
  67 #ifndef OPENSSL_NO_DH
  68 #include <stdio.h>
  69 #include <string.h>
  70 #include <sys/types.h>
  71 #include <sys/stat.h>
  72 #include "apps.h"
  73 #include <openssl/bio.h>
  74 #include <openssl/rand.h>
  75 #include <openssl/err.h>
  76 #include <openssl/bn.h>
  77 #include <openssl/dh.h>
  78 #include <openssl/x509.h>
  79 #include <openssl/pem.h>
  80
  81 #define DEFBITS 512
  82 #undef PROG
  83 #define PROG gendh_main
  84
  85 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb);
  86
  87 int MAIN(int, char **);
  88
  89 int MAIN(int argc, char **argv)
  90         {
  91         BN_GENCB cb;
  92 #ifndef OPENSSL_NO_ENGINE
  93         ENGINE *e = NULL;
  94 #endif
  95         DH *dh=NULL;
  96         int ret=1,num=DEFBITS;
  97         int g=2;
  98         char *outfile=NULL;
  99         char *inrand=NULL;
 100 #ifndef OPENSSL_NO_ENGINE
 101         char *engine=NULL;
 102 #endif
 103         BIO *out=NULL;
 104
 105         apps_startup();
 106
 107         BN_GENCB_set(&cb, dh_cb, bio_err);
 108         if (bio_err == NULL)
 109                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 110                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 111
 112         if (!load_config(bio_err, NULL))
 113                 goto end;
 114
 115         argv++;
 116         argc--;
 117         for (;;)
 118                 {
 119                 if (argc <= 0) break;
 120                 if (strcmp(*argv,"-out") == 0)
 121                         {
 122                         if (--argc < 1) goto bad;
 123                         outfile= *(++argv);
 124                         }
 125                 else if (strcmp(*argv,"-2") == 0)
 126                         g=2;
 127         /*      else if (strcmp(*argv,"-3") == 0)
 128                         g=3; */
 129                 else if (strcmp(*argv,"-5") == 0)
 130                         g=5;
 131 #ifndef OPENSSL_NO_ENGINE
 132                 else if (strcmp(*argv,"-engine") == 0)
 133                         {
 134                         if (--argc < 1) goto bad;
 135                         engine= *(++argv);
 136                         }
 137 #endif
 138                 else if (strcmp(*argv,"-rand") == 0)
 139                         {
 140                         if (--argc < 1) goto bad;
 141                         inrand= *(++argv);
 142                         }
 143                 else
 144                         break;
 145                 argv++;
 146                 argc--;
 147                 }
 148         if ((argc >= 1) && ((sscanf(*argv,"%d",&num) == 0) || (num < 0)))
 149                 {
 150 bad:
 151                 BIO_printf(bio_err,"usage: gendh [args] [numbits]\n");
 152                 BIO_printf(bio_err," -out file - output the key to 'file\n");
 153                 BIO_printf(bio_err," -2        - use 2 as the generator value\n");
 154         /*      BIO_printf(bio_err," -3        - use 3 as the generator value\n"); */
 155                 BIO_printf(bio_err," -5        - use 5 as the generator value\n");
 156 #ifndef OPENSSL_NO_ENGINE
 157                 BIO_printf(bio_err," -engine e - use engine e, possibly a hardware device.\n");
 158 #endif
 159                 BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
 160                 BIO_printf(bio_err,"           - load the file (or the files in the directory) into\n");
 161                 BIO_printf(bio_err,"             the random number generator\n");
 162                 goto end;
 163                 }
 164
 165 #ifndef OPENSSL_NO_ENGINE
 166         e = setup_engine(bio_err, engine, 0);
 167 #endif
 168
 169         out=BIO_new(BIO_s_file());
 170         if (out == NULL)
 171                 {
 172                 ERR_print_errors(bio_err);
 173                 goto end;
 174                 }
 175
 176         if (outfile == NULL)
 177                 {
 178                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 179 #ifdef OPENSSL_SYS_VMS
 180                 {
 181                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 182                 out = BIO_push(tmpbio, out);
 183                 }
 184 #endif
 185                 }
 186         else
 187                 {
 188                 if (BIO_write_filename(out,outfile) <= 0)
 189                         {
 190                         perror(outfile);
 191                         goto end;
 192                         }
 193                 }
 194
 195         if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL)
 196                 {
 197                 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
 198                 }
 199         if (inrand != NULL)
 200                 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 201                         app_RAND_load_files(inrand));
 202
 203         BIO_printf(bio_err,"Generating DH parameters, %d bit long safe prime, generator %d\n",num,g);
 204         BIO_printf(bio_err,"This is going to take a long time\n");
 205
 206         if(((dh = DH_new()) == NULL) || !DH_generate_parameters_ex(dh, num, g, &cb))
 207                 goto end;
 208
 209         app_RAND_write_file(NULL, bio_err);
 210
 211         if (!PEM_write_bio_DHparams(out,dh))
 212                 goto end;
 213         ret=0;
 214 end:
 215         if (ret != 0)
 216                 ERR_print_errors(bio_err);
 217         if (out != NULL) BIO_free_all(out);
 218         if (dh != NULL) DH_free(dh);
 219         apps_shutdown();
 220         OPENSSL_EXIT(ret);
 221         }
 222
 223 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb)
 224         {
 225         char c='*';
 226
 227         if (p == 0) c='.';
 228         if (p == 1) c='+';
 229         if (p == 2) c='*';
 230         if (p == 3) c='\n';
 231         BIO_write(cb->arg,&c,1);
 232         (void)BIO_flush(cb->arg);
 233 #ifdef LINT
 234         p=n;
 235 #endif
 236         return 1;
 237         }
 238 #endif