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