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genrsa.c 11 KB

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  1. /* apps/genrsa.c */
  2. /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
  3. * All rights reserved.
  4. *
  5. * This package is an SSL implementation written
  6. * by Eric Young (eay@cryptsoft.com).
  7. * The implementation was written so as to conform with Netscapes SSL.
  8. *
  9. * This library is free for commercial and non-commercial use as long as
  10. * the following conditions are aheared to. The following conditions
  11. * apply to all code found in this distribution, be it the RC4, RSA,
  12. * lhash, DES, etc., code; not just the SSL code. The SSL documentation
  13. * included with this distribution is covered by the same copyright terms
  14. * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15. *
  16. * Copyright remains Eric Young's, and as such any Copyright notices in
  17. * the code are not to be removed.
  18. * If this package is used in a product, Eric Young should be given attribution
  19. * as the author of the parts of the library used.
  20. * This can be in the form of a textual message at program startup or
  21. * in documentation (online or textual) provided with the package.
  22. *
  23. * Redistribution and use in source and binary forms, with or without
  24. * modification, are permitted provided that the following conditions
  25. * are met:
  26. * 1. Redistributions of source code must retain the copyright
  27. * notice, this list of conditions and the following disclaimer.
  28. * 2. Redistributions in binary form must reproduce the above copyright
  29. * notice, this list of conditions and the following disclaimer in the
  30. * documentation and/or other materials provided with the distribution.
  31. * 3. All advertising materials mentioning features or use of this software
  32. * must display the following acknowledgement:
  33. * "This product includes cryptographic software written by
  34. * Eric Young (eay@cryptsoft.com)"
  35. * The word 'cryptographic' can be left out if the rouines from the library
  36. * being used are not cryptographic related :-).
  37. * 4. If you include any Windows specific code (or a derivative thereof) from
  38. * the apps directory (application code) you must include an acknowledgement:
  39. * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40. *
  41. * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42. * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44. * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45. * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47. * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49. * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50. * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51. * SUCH DAMAGE.
  52. *
  53. * The licence and distribution terms for any publically available version or
  54. * derivative of this code cannot be changed. i.e. this code cannot simply be
  55. * copied and put under another distribution licence
  56. * [including the GNU Public Licence.]
  57. */
  58. #include <openssl/opensslconf.h>
  59. /*
  60. * Until the key-gen callbacks are modified to use newer prototypes, we allow
  61. * deprecated functions for openssl-internal code
  62. */
  63. #ifdef OPENSSL_NO_DEPRECATED
  64. # undef OPENSSL_NO_DEPRECATED
  65. #endif
  66. #ifndef OPENSSL_NO_RSA
  67. # include <stdio.h>
  68. # include <string.h>
  69. # include <sys/types.h>
  70. # include <sys/stat.h>
  71. # include "apps.h"
  72. # include <openssl/bio.h>
  73. # include <openssl/err.h>
  74. # include <openssl/bn.h>
  75. # include <openssl/rsa.h>
  76. # include <openssl/evp.h>
  77. # include <openssl/x509.h>
  78. # include <openssl/pem.h>
  79. # include <openssl/rand.h>
  80. # define DEFBITS 512
  81. # undef PROG
  82. # define PROG genrsa_main
  83. static int MS_CALLBACK genrsa_cb(int p, int n, BN_GENCB *cb);
  84. int MAIN(int, char **);
  85. int MAIN(int argc, char **argv)
  86. {
  87. BN_GENCB cb;
  88. int ret = 1;
  89. int i, num = DEFBITS;
  90. long l;
  91. int use_x931 = 0;
  92. const EVP_CIPHER *enc = NULL;
  93. unsigned long f4 = RSA_F4;
  94. char *outfile = NULL;
  95. char *passargout = NULL, *passout = NULL;
  96. # ifndef OPENSSL_NO_ENGINE
  97. char *engine = NULL;
  98. # endif
  99. char *inrand = NULL;
  100. BIO *out = NULL;
  101. BIGNUM *bn = BN_new();
  102. RSA *rsa = NULL;
  103. if (!bn)
  104. goto err;
  105. apps_startup();
  106. BN_GENCB_set(&cb, genrsa_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. if (!load_config(bio_err, NULL))
  111. goto err;
  112. if ((out = BIO_new(BIO_s_file())) == NULL) {
  113. BIO_printf(bio_err, "unable to create BIO for output\n");
  114. goto err;
  115. }
  116. argv++;
  117. argc--;
  118. for (;;) {
  119. if (argc <= 0)
  120. break;
  121. if (strcmp(*argv, "-out") == 0) {
  122. if (--argc < 1)
  123. goto bad;
  124. outfile = *(++argv);
  125. } else if (strcmp(*argv, "-3") == 0)
  126. f4 = 3;
  127. else if (strcmp(*argv, "-F4") == 0 || strcmp(*argv, "-f4") == 0)
  128. f4 = RSA_F4;
  129. else if (strcmp(*argv, "-x931") == 0)
  130. use_x931 = 1;
  131. # ifndef OPENSSL_NO_ENGINE
  132. else if (strcmp(*argv, "-engine") == 0) {
  133. if (--argc < 1)
  134. goto bad;
  135. engine = *(++argv);
  136. }
  137. # endif
  138. else if (strcmp(*argv, "-rand") == 0) {
  139. if (--argc < 1)
  140. goto bad;
  141. inrand = *(++argv);
  142. }
  143. # ifndef OPENSSL_NO_DES
  144. else if (strcmp(*argv, "-des") == 0)
  145. enc = EVP_des_cbc();
  146. else if (strcmp(*argv, "-des3") == 0)
  147. enc = EVP_des_ede3_cbc();
  148. # endif
  149. # ifndef OPENSSL_NO_IDEA
  150. else if (strcmp(*argv, "-idea") == 0)
  151. enc = EVP_idea_cbc();
  152. # endif
  153. # ifndef OPENSSL_NO_SEED
  154. else if (strcmp(*argv, "-seed") == 0)
  155. enc = EVP_seed_cbc();
  156. # endif
  157. # ifndef OPENSSL_NO_AES
  158. else if (strcmp(*argv, "-aes128") == 0)
  159. enc = EVP_aes_128_cbc();
  160. else if (strcmp(*argv, "-aes192") == 0)
  161. enc = EVP_aes_192_cbc();
  162. else if (strcmp(*argv, "-aes256") == 0)
  163. enc = EVP_aes_256_cbc();
  164. # endif
  165. # ifndef OPENSSL_NO_CAMELLIA
  166. else if (strcmp(*argv, "-camellia128") == 0)
  167. enc = EVP_camellia_128_cbc();
  168. else if (strcmp(*argv, "-camellia192") == 0)
  169. enc = EVP_camellia_192_cbc();
  170. else if (strcmp(*argv, "-camellia256") == 0)
  171. enc = EVP_camellia_256_cbc();
  172. # endif
  173. else if (strcmp(*argv, "-passout") == 0) {
  174. if (--argc < 1)
  175. goto bad;
  176. passargout = *(++argv);
  177. } else
  178. break;
  179. argv++;
  180. argc--;
  181. }
  182. if ((argc >= 1) && ((sscanf(*argv, "%d", &num) == 0) || (num < 0))) {
  183. bad:
  184. BIO_printf(bio_err, "usage: genrsa [args] [numbits]\n");
  185. BIO_printf(bio_err,
  186. " -des encrypt the generated key with DES in cbc mode\n");
  187. BIO_printf(bio_err,
  188. " -des3 encrypt the generated key with DES in ede cbc mode (168 bit key)\n");
  189. # ifndef OPENSSL_NO_IDEA
  190. BIO_printf(bio_err,
  191. " -idea encrypt the generated key with IDEA in cbc mode\n");
  192. # endif
  193. # ifndef OPENSSL_NO_SEED
  194. BIO_printf(bio_err, " -seed\n");
  195. BIO_printf(bio_err,
  196. " encrypt PEM output with cbc seed\n");
  197. # endif
  198. # ifndef OPENSSL_NO_AES
  199. BIO_printf(bio_err, " -aes128, -aes192, -aes256\n");
  200. BIO_printf(bio_err,
  201. " encrypt PEM output with cbc aes\n");
  202. # endif
  203. # ifndef OPENSSL_NO_CAMELLIA
  204. BIO_printf(bio_err, " -camellia128, -camellia192, -camellia256\n");
  205. BIO_printf(bio_err,
  206. " encrypt PEM output with cbc camellia\n");
  207. # endif
  208. BIO_printf(bio_err, " -out file output the key to 'file\n");
  209. BIO_printf(bio_err,
  210. " -passout arg output file pass phrase source\n");
  211. BIO_printf(bio_err,
  212. " -f4 use F4 (0x10001) for the E value\n");
  213. BIO_printf(bio_err, " -3 use 3 for the E value\n");
  214. # ifndef OPENSSL_NO_ENGINE
  215. BIO_printf(bio_err,
  216. " -engine e use engine e, possibly a hardware device.\n");
  217. # endif
  218. BIO_printf(bio_err, " -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR,
  219. LIST_SEPARATOR_CHAR);
  220. BIO_printf(bio_err,
  221. " load the file (or the files in the directory) into\n");
  222. BIO_printf(bio_err, " the random number generator\n");
  223. goto err;
  224. }
  225. ERR_load_crypto_strings();
  226. if (!app_passwd(bio_err, NULL, passargout, NULL, &passout)) {
  227. BIO_printf(bio_err, "Error getting password\n");
  228. goto err;
  229. }
  230. # ifndef OPENSSL_NO_ENGINE
  231. setup_engine(bio_err, engine, 0);
  232. # endif
  233. if (outfile == NULL) {
  234. BIO_set_fp(out, stdout, BIO_NOCLOSE);
  235. # ifdef OPENSSL_SYS_VMS
  236. {
  237. BIO *tmpbio = BIO_new(BIO_f_linebuffer());
  238. out = BIO_push(tmpbio, out);
  239. }
  240. # endif
  241. } else {
  242. if (BIO_write_filename(out, outfile) <= 0) {
  243. perror(outfile);
  244. goto err;
  245. }
  246. }
  247. if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL
  248. && !RAND_status()) {
  249. BIO_printf(bio_err,
  250. "warning, not much extra random data, consider using the -rand option\n");
  251. }
  252. if (inrand != NULL)
  253. BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
  254. app_RAND_load_files(inrand));
  255. BIO_printf(bio_err, "Generating RSA private key, %d bit long modulus\n",
  256. num);
  257. rsa = RSA_new();
  258. if (!rsa)
  259. goto err;
  260. if (use_x931) {
  261. BIGNUM *pubexp;
  262. pubexp = BN_new();
  263. if (!BN_set_word(pubexp, f4))
  264. goto err;
  265. if (!RSA_X931_generate_key_ex(rsa, num, pubexp, &cb))
  266. goto err;
  267. BN_free(pubexp);
  268. } else if (!BN_set_word(bn, f4)
  269. || !RSA_generate_key_ex(rsa, num, bn, &cb))
  270. goto err;
  271. app_RAND_write_file(NULL, bio_err);
  272. /*
  273. * We need to do the following for when the base number size is < long,
  274. * esp windows 3.1 :-(.
  275. */
  276. l = 0L;
  277. for (i = 0; i < rsa->e->top; i++) {
  278. # ifndef SIXTY_FOUR_BIT
  279. l <<= BN_BITS4;
  280. l <<= BN_BITS4;
  281. # endif
  282. l += rsa->e->d[i];
  283. }
  284. BIO_printf(bio_err, "e is %ld (0x%lX)\n", l, l);
  285. {
  286. PW_CB_DATA cb_data;
  287. cb_data.password = passout;
  288. cb_data.prompt_info = outfile;
  289. if (!PEM_write_bio_RSAPrivateKey(out, rsa, enc, NULL, 0,
  290. (pem_password_cb *)password_callback,
  291. &cb_data))
  292. goto err;
  293. }
  294. ret = 0;
  295. err:
  296. if (bn)
  297. BN_free(bn);
  298. if (rsa)
  299. RSA_free(rsa);
  300. if (out)
  301. BIO_free_all(out);
  302. if (passout)
  303. OPENSSL_free(passout);
  304. if (ret != 0)
  305. ERR_print_errors(bio_err);
  306. apps_shutdown();
  307. OPENSSL_EXIT(ret);
  308. }
  309. static int MS_CALLBACK genrsa_cb(int p, int n, BN_GENCB *cb)
  310. {
  311. char c = '*';
  312. if (p == 0)
  313. c = '.';
  314. if (p == 1)
  315. c = '+';
  316. if (p == 2)
  317. c = '*';
  318. if (p == 3)
  319. c = '\n';
  320. BIO_write(cb->arg, &c, 1);
  321. (void)BIO_flush(cb->arg);
  322. # ifdef LINT
  323. p = n;
  324. # endif
  325. return 1;
  326. }
  327. #else /* !OPENSSL_NO_RSA */
  328. # if PEDANTIC
  329. static void *dummy = &dummy;
  330. # endif
  331. #endif