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gendh.c 7.1 KB

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