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rand.c 5.9 KB

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  1. /* apps/rand.c */
  2. /* ====================================================================
  3. * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
  4. *
  5. * Redistribution and use in source and binary forms, with or without
  6. * modification, are permitted provided that the following conditions
  7. * are met:
  8. *
  9. * 1. Redistributions of source code must retain the above copyright
  10. * notice, this list of conditions and the following disclaimer.
  11. *
  12. * 2. Redistributions in binary form must reproduce the above copyright
  13. * notice, this list of conditions and the following disclaimer in
  14. * the documentation and/or other materials provided with the
  15. * distribution.
  16. *
  17. * 3. All advertising materials mentioning features or use of this
  18. * software must display the following acknowledgment:
  19. * "This product includes software developed by the OpenSSL Project
  20. * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  21. *
  22. * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  23. * endorse or promote products derived from this software without
  24. * prior written permission. For written permission, please contact
  25. * openssl-core@openssl.org.
  26. *
  27. * 5. Products derived from this software may not be called "OpenSSL"
  28. * nor may "OpenSSL" appear in their names without prior written
  29. * permission of the OpenSSL Project.
  30. *
  31. * 6. Redistributions of any form whatsoever must retain the following
  32. * acknowledgment:
  33. * "This product includes software developed by the OpenSSL Project
  34. * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  35. *
  36. * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  37. * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  38. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  39. * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
  40. * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  41. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  42. * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  43. * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  44. * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  45. * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  46. * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  47. * OF THE POSSIBILITY OF SUCH DAMAGE.
  48. * ====================================================================
  49. *
  50. * This product includes cryptographic software written by Eric Young
  51. * (eay@cryptsoft.com). This product includes software written by Tim
  52. * Hudson (tjh@cryptsoft.com).
  53. *
  54. */
  55. #include "apps.h"
  56. #include <ctype.h>
  57. #include <stdio.h>
  58. #include <string.h>
  59. #include <openssl/bio.h>
  60. #include <openssl/err.h>
  61. #include <openssl/rand.h>
  62. #undef PROG
  63. #define PROG rand_main
  64. /* -out file - write to file
  65. * -rand file:file - PRNG seed files
  66. * -base64 - encode output
  67. * num - write 'num' bytes
  68. */
  69. int MAIN(int, char **);
  70. int MAIN(int argc, char **argv)
  71. {
  72. #ifndef OPENSSL_NO_ENGINE
  73. ENGINE *e = NULL;
  74. #endif
  75. int i, r, ret = 1;
  76. int badopt;
  77. char *outfile = NULL;
  78. char *inrand = NULL;
  79. int base64 = 0;
  80. BIO *out = NULL;
  81. int num = -1;
  82. #ifndef OPENSSL_NO_ENGINE
  83. char *engine=NULL;
  84. #endif
  85. apps_startup();
  86. if (bio_err == NULL)
  87. if ((bio_err = BIO_new(BIO_s_file())) != NULL)
  88. BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT);
  89. if (!load_config(bio_err, NULL))
  90. goto err;
  91. badopt = 0;
  92. i = 0;
  93. while (!badopt && argv[++i] != NULL)
  94. {
  95. if (strcmp(argv[i], "-out") == 0)
  96. {
  97. if ((argv[i+1] != NULL) && (outfile == NULL))
  98. outfile = argv[++i];
  99. else
  100. badopt = 1;
  101. }
  102. #ifndef OPENSSL_NO_ENGINE
  103. else if (strcmp(argv[i], "-engine") == 0)
  104. {
  105. if ((argv[i+1] != NULL) && (engine == NULL))
  106. engine = argv[++i];
  107. else
  108. badopt = 1;
  109. }
  110. #endif
  111. else if (strcmp(argv[i], "-rand") == 0)
  112. {
  113. if ((argv[i+1] != NULL) && (inrand == NULL))
  114. inrand = argv[++i];
  115. else
  116. badopt = 1;
  117. }
  118. else if (strcmp(argv[i], "-base64") == 0)
  119. {
  120. if (!base64)
  121. base64 = 1;
  122. else
  123. badopt = 1;
  124. }
  125. else if (isdigit((unsigned char)argv[i][0]))
  126. {
  127. if (num < 0)
  128. {
  129. r = sscanf(argv[i], "%d", &num);
  130. if (r == 0 || num < 0)
  131. badopt = 1;
  132. }
  133. else
  134. badopt = 1;
  135. }
  136. else
  137. badopt = 1;
  138. }
  139. if (num < 0)
  140. badopt = 1;
  141. if (badopt)
  142. {
  143. BIO_printf(bio_err, "Usage: rand [options] num\n");
  144. BIO_printf(bio_err, "where options are\n");
  145. BIO_printf(bio_err, "-out file - write to file\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... - seed PRNG from files\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
  150. BIO_printf(bio_err, "-base64 - encode output\n");
  151. goto err;
  152. }
  153. #ifndef OPENSSL_NO_ENGINE
  154. e = setup_engine(bio_err, engine, 0);
  155. #endif
  156. app_RAND_load_file(NULL, bio_err, (inrand != NULL));
  157. if (inrand != NULL)
  158. BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
  159. app_RAND_load_files(inrand));
  160. out = BIO_new(BIO_s_file());
  161. if (out == NULL)
  162. goto err;
  163. if (outfile != NULL)
  164. r = BIO_write_filename(out, outfile);
  165. else
  166. {
  167. r = BIO_set_fp(out, stdout, BIO_NOCLOSE | BIO_FP_TEXT);
  168. #ifdef OPENSSL_SYS_VMS
  169. {
  170. BIO *tmpbio = BIO_new(BIO_f_linebuffer());
  171. out = BIO_push(tmpbio, out);
  172. }
  173. #endif
  174. }
  175. if (r <= 0)
  176. goto err;
  177. if (base64)
  178. {
  179. BIO *b64 = BIO_new(BIO_f_base64());
  180. if (b64 == NULL)
  181. goto err;
  182. out = BIO_push(b64, out);
  183. }
  184. while (num > 0)
  185. {
  186. unsigned char buf[4096];
  187. int chunk;
  188. chunk = num;
  189. if (chunk > (int)sizeof(buf))
  190. chunk = sizeof buf;
  191. r = RAND_bytes(buf, chunk);
  192. if (r <= 0)
  193. goto err;
  194. BIO_write(out, buf, chunk);
  195. num -= chunk;
  196. }
  197. BIO_flush(out);
  198. app_RAND_write_file(NULL, bio_err);
  199. ret = 0;
  200. err:
  201. ERR_print_errors(bio_err);
  202. if (out)
  203. BIO_free_all(out);
  204. apps_shutdown();
  205. OPENSSL_EXIT(ret);
  206. }