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dh.c 11 KB

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  1. /* apps/dh.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> /* for OPENSSL_NO_DH */
  60. #ifndef OPENSSL_NO_DH
  61. # include <stdio.h>
  62. # include <stdlib.h>
  63. # include <time.h>
  64. # include <string.h>
  65. # include "apps.h"
  66. # include <openssl/bio.h>
  67. # include <openssl/err.h>
  68. # include <openssl/bn.h>
  69. # include <openssl/dh.h>
  70. # include <openssl/x509.h>
  71. # include <openssl/pem.h>
  72. # undef PROG
  73. # define PROG dh_main
  74. /*-
  75. * -inform arg - input format - default PEM (DER or PEM)
  76. * -outform arg - output format - default PEM
  77. * -in arg - input file - default stdin
  78. * -out arg - output file - default stdout
  79. * -check - check the parameters are ok
  80. * -noout
  81. * -text
  82. * -C
  83. */
  84. int MAIN(int, char **);
  85. int MAIN(int argc, char **argv)
  86. {
  87. DH *dh = NULL;
  88. int i, badops = 0, text = 0;
  89. BIO *in = NULL, *out = NULL;
  90. int informat, outformat, check = 0, noout = 0, C = 0, ret = 1;
  91. char *infile, *outfile, *prog;
  92. char *engine;
  93. apps_startup();
  94. if (bio_err == NULL)
  95. if ((bio_err = BIO_new(BIO_s_file())) != NULL)
  96. BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
  97. if (!load_config(bio_err, NULL))
  98. goto end;
  99. engine = NULL;
  100. infile = NULL;
  101. outfile = NULL;
  102. informat = FORMAT_PEM;
  103. outformat = FORMAT_PEM;
  104. prog = argv[0];
  105. argc--;
  106. argv++;
  107. while (argc >= 1) {
  108. if (strcmp(*argv, "-inform") == 0) {
  109. if (--argc < 1)
  110. goto bad;
  111. informat = str2fmt(*(++argv));
  112. } else if (strcmp(*argv, "-outform") == 0) {
  113. if (--argc < 1)
  114. goto bad;
  115. outformat = str2fmt(*(++argv));
  116. } else if (strcmp(*argv, "-in") == 0) {
  117. if (--argc < 1)
  118. goto bad;
  119. infile = *(++argv);
  120. } else if (strcmp(*argv, "-out") == 0) {
  121. if (--argc < 1)
  122. goto bad;
  123. outfile = *(++argv);
  124. }
  125. # ifndef OPENSSL_NO_ENGINE
  126. else if (strcmp(*argv, "-engine") == 0) {
  127. if (--argc < 1)
  128. goto bad;
  129. engine = *(++argv);
  130. }
  131. # endif
  132. else if (strcmp(*argv, "-check") == 0)
  133. check = 1;
  134. else if (strcmp(*argv, "-text") == 0)
  135. text = 1;
  136. else if (strcmp(*argv, "-C") == 0)
  137. C = 1;
  138. else if (strcmp(*argv, "-noout") == 0)
  139. noout = 1;
  140. else {
  141. BIO_printf(bio_err, "unknown option %s\n", *argv);
  142. badops = 1;
  143. break;
  144. }
  145. argc--;
  146. argv++;
  147. }
  148. if (badops) {
  149. bad:
  150. BIO_printf(bio_err, "%s [options] <infile >outfile\n", prog);
  151. BIO_printf(bio_err, "where options are\n");
  152. BIO_printf(bio_err, " -inform arg input format - one of DER PEM\n");
  153. BIO_printf(bio_err,
  154. " -outform arg output format - one of DER PEM\n");
  155. BIO_printf(bio_err, " -in arg input file\n");
  156. BIO_printf(bio_err, " -out arg output file\n");
  157. BIO_printf(bio_err, " -check check the DH parameters\n");
  158. BIO_printf(bio_err,
  159. " -text print a text form of the DH parameters\n");
  160. BIO_printf(bio_err, " -C Output C code\n");
  161. BIO_printf(bio_err, " -noout no output\n");
  162. # ifndef OPENSSL_NO_ENGINE
  163. BIO_printf(bio_err,
  164. " -engine e use engine e, possibly a hardware device.\n");
  165. # endif
  166. goto end;
  167. }
  168. ERR_load_crypto_strings();
  169. setup_engine(bio_err, engine, 0);
  170. in = BIO_new(BIO_s_file());
  171. out = BIO_new(BIO_s_file());
  172. if ((in == NULL) || (out == NULL)) {
  173. ERR_print_errors(bio_err);
  174. goto end;
  175. }
  176. if (infile == NULL)
  177. BIO_set_fp(in, stdin, BIO_NOCLOSE);
  178. else {
  179. if (BIO_read_filename(in, infile) <= 0) {
  180. perror(infile);
  181. goto end;
  182. }
  183. }
  184. if (outfile == NULL) {
  185. BIO_set_fp(out, stdout, BIO_NOCLOSE);
  186. # ifdef OPENSSL_SYS_VMS
  187. {
  188. BIO *tmpbio = BIO_new(BIO_f_linebuffer());
  189. out = BIO_push(tmpbio, out);
  190. }
  191. # endif
  192. } else {
  193. if (BIO_write_filename(out, outfile) <= 0) {
  194. perror(outfile);
  195. goto end;
  196. }
  197. }
  198. if (informat == FORMAT_ASN1)
  199. dh = d2i_DHparams_bio(in, NULL);
  200. else if (informat == FORMAT_PEM)
  201. dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL);
  202. else {
  203. BIO_printf(bio_err, "bad input format specified\n");
  204. goto end;
  205. }
  206. if (dh == NULL) {
  207. BIO_printf(bio_err, "unable to load DH parameters\n");
  208. ERR_print_errors(bio_err);
  209. goto end;
  210. }
  211. if (text) {
  212. DHparams_print(out, dh);
  213. # ifdef undef
  214. printf("p=");
  215. BN_print(stdout, dh->p);
  216. printf("\ng=");
  217. BN_print(stdout, dh->g);
  218. printf("\n");
  219. if (dh->length != 0)
  220. printf("recommended private length=%ld\n", dh->length);
  221. # endif
  222. }
  223. if (check) {
  224. if (!DH_check(dh, &i)) {
  225. ERR_print_errors(bio_err);
  226. goto end;
  227. }
  228. if (i & DH_CHECK_P_NOT_PRIME)
  229. printf("p value is not prime\n");
  230. if (i & DH_CHECK_P_NOT_SAFE_PRIME)
  231. printf("p value is not a safe prime\n");
  232. if (i & DH_UNABLE_TO_CHECK_GENERATOR)
  233. printf("unable to check the generator value\n");
  234. if (i & DH_NOT_SUITABLE_GENERATOR)
  235. printf("the g value is not a generator\n");
  236. if (i == 0)
  237. printf("DH parameters appear to be ok.\n");
  238. }
  239. if (C) {
  240. unsigned char *data;
  241. int len, l, bits;
  242. len = BN_num_bytes(dh->p);
  243. bits = BN_num_bits(dh->p);
  244. data = (unsigned char *)OPENSSL_malloc(len);
  245. if (data == NULL) {
  246. perror("OPENSSL_malloc");
  247. goto end;
  248. }
  249. l = BN_bn2bin(dh->p, data);
  250. printf("static unsigned char dh%d_p[]={", bits);
  251. for (i = 0; i < l; i++) {
  252. if ((i % 12) == 0)
  253. printf("\n\t");
  254. printf("0x%02X,", data[i]);
  255. }
  256. printf("\n\t};\n");
  257. l = BN_bn2bin(dh->g, data);
  258. printf("static unsigned char dh%d_g[]={", bits);
  259. for (i = 0; i < l; i++) {
  260. if ((i % 12) == 0)
  261. printf("\n\t");
  262. printf("0x%02X,", data[i]);
  263. }
  264. printf("\n\t};\n\n");
  265. printf("DH *get_dh%d()\n\t{\n", bits);
  266. printf("\tDH *dh;\n\n");
  267. printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n");
  268. printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n",
  269. bits, bits);
  270. printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n",
  271. bits, bits);
  272. printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n");
  273. printf("\t\treturn(NULL);\n");
  274. printf("\treturn(dh);\n\t}\n");
  275. OPENSSL_free(data);
  276. }
  277. if (!noout) {
  278. if (outformat == FORMAT_ASN1)
  279. i = i2d_DHparams_bio(out, dh);
  280. else if (outformat == FORMAT_PEM)
  281. i = PEM_write_bio_DHparams(out, dh);
  282. else {
  283. BIO_printf(bio_err, "bad output format specified for outfile\n");
  284. goto end;
  285. }
  286. if (!i) {
  287. BIO_printf(bio_err, "unable to write DH parameters\n");
  288. ERR_print_errors(bio_err);
  289. goto end;
  290. }
  291. }
  292. ret = 0;
  293. end:
  294. if (in != NULL)
  295. BIO_free(in);
  296. if (out != NULL)
  297. BIO_free_all(out);
  298. if (dh != NULL)
  299. DH_free(dh);
  300. apps_shutdown();
  301. OPENSSL_EXIT(ret);
  302. }
  303. #else /* !OPENSSL_NO_DH */
  304. # if PEDANTIC
  305. static void *dummy = &dummy;
  306. # endif
  307. #endif