release/src-rt-6.x.4708/router/openssl/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 /*
  62  * Until the key-gen callbacks are modified to use newer prototypes, we allow
  63  * deprecated functions for openssl-internal code
  64  */
  65 #ifdef OPENSSL_NO_DEPRECATED
  66 # undef OPENSSL_NO_DEPRECATED
  67 #endif
  68
  69 #ifndef OPENSSL_NO_DH
  70 # include <stdio.h>
  71 # include <string.h>
  72 # include <sys/types.h>
  73 # include <sys/stat.h>
  74 # include "apps.h"
  75 # include <openssl/bio.h>
  76 # include <openssl/rand.h>
  77 # include <openssl/err.h>
  78 # include <openssl/bn.h>
  79 # include <openssl/dh.h>
  80 # include <openssl/x509.h>
  81 # include <openssl/pem.h>
  82
  83 # define DEFBITS 2048
  84 # undef PROG
  85 # define PROG gendh_main
  86
  87 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb);
  88
  89 int MAIN(int, char **);
  90
  91 int MAIN(int argc, char **argv)
  92 {
  93     BN_GENCB cb;
  94     DH *dh = NULL;
  95     int ret = 1, num = DEFBITS;
  96     int g = 2;
  97     char *outfile = NULL;
  98     char *inrand = NULL;
  99 # ifndef OPENSSL_NO_ENGINE
 100     char *engine = NULL;
 101 # endif
 102     BIO *out = NULL;
 103
 104     apps_startup();
 105
 106     BN_GENCB_set(&cb, dh_cb, bio_err);
 107     if (bio_err == NULL)
 108         if ((bio_err = BIO_new(BIO_s_file())) != NULL)
 109             BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
 110
 111     if (!load_config(bio_err, NULL))
 112         goto end;
 113
 114     argv++;
 115     argc--;
 116     for (;;) {
 117         if (argc <= 0)
 118             break;
 119         if (strcmp(*argv, "-out") == 0) {
 120             if (--argc < 1)
 121                 goto bad;
 122             outfile = *(++argv);
 123         } else if (strcmp(*argv, "-2") == 0)
 124             g = 2;
 125 /*-     else if (strcmp(*argv,"-3") == 0)
 126                 g=3; */
 127         else if (strcmp(*argv, "-5") == 0)
 128             g = 5;
 129 # ifndef OPENSSL_NO_ENGINE
 130         else if (strcmp(*argv, "-engine") == 0) {
 131             if (--argc < 1)
 132                 goto bad;
 133             engine = *(++argv);
 134         }
 135 # endif
 136         else if (strcmp(*argv, "-rand") == 0) {
 137             if (--argc < 1)
 138                 goto bad;
 139             inrand = *(++argv);
 140         } else
 141             break;
 142         argv++;
 143         argc--;
 144     }
 145     if ((argc >= 1) && ((sscanf(*argv, "%d", &num) == 0) || (num < 0))) {
 146  bad:
 147         BIO_printf(bio_err, "usage: gendh [args] [numbits]\n");
 148         BIO_printf(bio_err, " -out file - output the key to 'file\n");
 149         BIO_printf(bio_err, " -2        - use 2 as the generator value\n");
 150         /*
 151          * BIO_printf(bio_err," -3 - use 3 as the generator value\n");
 152          */
 153         BIO_printf(bio_err, " -5        - use 5 as the generator value\n");
 154 # ifndef OPENSSL_NO_ENGINE
 155         BIO_printf(bio_err,
 156                    " -engine e - use engine e, possibly a hardware device.\n");
 157 # endif
 158         BIO_printf(bio_err, " -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR,
 159                    LIST_SEPARATOR_CHAR);
 160         BIO_printf(bio_err,
 161                    "           - load the file (or the files in the directory) into\n");
 162         BIO_printf(bio_err, "             the random number generator\n");
 163         goto end;
 164     }
 165 # ifndef OPENSSL_NO_ENGINE
 166     setup_engine(bio_err, engine, 0);
 167 # endif
 168
 169     out = BIO_new(BIO_s_file());
 170     if (out == NULL) {
 171         ERR_print_errors(bio_err);
 172         goto end;
 173     }
 174
 175     if (outfile == NULL) {
 176         BIO_set_fp(out, stdout, BIO_NOCLOSE);
 177 # ifdef OPENSSL_SYS_VMS
 178         {
 179             BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 180             out = BIO_push(tmpbio, out);
 181         }
 182 # endif
 183     } else {
 184         if (BIO_write_filename(out, outfile) <= 0) {
 185             perror(outfile);
 186             goto end;
 187         }
 188     }
 189
 190     if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL) {
 191         BIO_printf(bio_err,
 192                    "warning, not much extra random data, consider using the -rand option\n");
 193     }
 194     if (inrand != NULL)
 195         BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
 196                    app_RAND_load_files(inrand));
 197
 198     BIO_printf(bio_err,
 199                "Generating DH parameters, %d bit long safe prime, generator %d\n",
 200                num, g);
 201     BIO_printf(bio_err, "This is going to take a long time\n");
 202
 203     if (((dh = DH_new()) == NULL)
 204         || !DH_generate_parameters_ex(dh, num, g, &cb))
 205         goto end;
 206
 207     app_RAND_write_file(NULL, bio_err);
 208
 209     if (!PEM_write_bio_DHparams(out, dh))
 210         goto end;
 211     ret = 0;
 212  end:
 213     if (ret != 0)
 214         ERR_print_errors(bio_err);
 215     if (out != NULL)
 216         BIO_free_all(out);
 217     if (dh != NULL)
 218         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)
 228         c = '.';
 229     if (p == 1)
 230         c = '+';
 231     if (p == 2)
 232         c = '*';
 233     if (p == 3)
 234         c = '\n';
 235     BIO_write(cb->arg, &c, 1);
 236     (void)BIO_flush(cb->arg);
 237 # ifdef LINT
 238     p = n;
 239 # endif
 240     return 1;
 241 }
 242 #else                           /* !OPENSSL_NO_DH */
 243
 244 # if PEDANTIC
 245 static void *dummy = &dummy;
 246 # endif
 247
 248 #endif