1 /* apps/dhparam.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 /* ==================================================================== 59 * Copyright (c) 1998-2000 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core@openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@cryptsoft.com). 109 * 110 */ 111 112 #include <openssl/opensslconf.h> /* for OPENSSL_NO_DH */ 113 #ifndef OPENSSL_NO_DH 114 # include <stdio.h> 115 # include <stdlib.h> 116 # include <time.h> 117 # include <string.h> 118 # include "apps.h" 119 # include <openssl/bio.h> 120 # include <openssl/err.h> 121 # include <openssl/bn.h> 122 # include <openssl/dh.h> 123 # include <openssl/x509.h> 124 # include <openssl/pem.h> 125 126 # ifndef OPENSSL_NO_DSA 127 # include <openssl/dsa.h> 128 # endif 129 130 # undef PROG 131 # define PROG dhparam_main 132 133 # define DEFBITS 2048 134 135 /*- 136 * -inform arg - input format - default PEM (DER or PEM) 137 * -outform arg - output format - default PEM 138 * -in arg - input file - default stdin 139 * -out arg - output file - default stdout 140 * -dsaparam - read or generate DSA parameters, convert to DH 141 * -check - check the parameters are ok 142 * -noout 143 * -text 144 * -C 145 */ 146 147 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb); 148 149 int MAIN(int, char **); 150 151 int MAIN(int argc, char **argv) 152 { 153 DH *dh = NULL; 154 int i, badops = 0, text = 0; 155 # ifndef OPENSSL_NO_DSA 156 int dsaparam = 0; 157 # endif 158 BIO *in = NULL, *out = NULL; 159 int informat, outformat, check = 0, noout = 0, C = 0, ret = 1; 160 char *infile, *outfile, *prog; 161 char *inrand = NULL; 162 char *engine = NULL; 163 ENGINE *e = NULL; 164 int num = 0, g = 0; 165 166 apps_startup(); 167 168 if (bio_err == NULL) 169 if ((bio_err = BIO_new(BIO_s_file())) != NULL) 170 BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT); 171 172 if (!load_config(bio_err, NULL)) 173 goto end; 174 175 infile = NULL; 176 outfile = NULL; 177 informat = FORMAT_PEM; 178 outformat = FORMAT_PEM; 179 180 prog = argv[0]; 181 argc--; 182 argv++; 183 while (argc >= 1) { 184 if (strcmp(*argv, "-inform") == 0) { 185 if (--argc < 1) 186 goto bad; 187 informat = str2fmt(*(++argv)); 188 } else if (strcmp(*argv, "-outform") == 0) { 189 if (--argc < 1) 190 goto bad; 191 outformat = str2fmt(*(++argv)); 192 } else if (strcmp(*argv, "-in") == 0) { 193 if (--argc < 1) 194 goto bad; 195 infile = *(++argv); 196 } else if (strcmp(*argv, "-out") == 0) { 197 if (--argc < 1) 198 goto bad; 199 outfile = *(++argv); 200 } 201 # ifndef OPENSSL_NO_ENGINE 202 else if (strcmp(*argv, "-engine") == 0) { 203 if (--argc < 1) 204 goto bad; 205 engine = *(++argv); 206 } 207 # endif 208 else if (strcmp(*argv, "-check") == 0) 209 check = 1; 210 else if (strcmp(*argv, "-text") == 0) 211 text = 1; 212 # ifndef OPENSSL_NO_DSA 213 else if (strcmp(*argv, "-dsaparam") == 0) 214 dsaparam = 1; 215 # endif 216 else if (strcmp(*argv, "-C") == 0) 217 C = 1; 218 else if (strcmp(*argv, "-noout") == 0) 219 noout = 1; 220 else if (strcmp(*argv, "-2") == 0) 221 g = 2; 222 else if (strcmp(*argv, "-5") == 0) 223 g = 5; 224 else if (strcmp(*argv, "-rand") == 0) { 225 if (--argc < 1) 226 goto bad; 227 inrand = *(++argv); 228 } else if (((sscanf(*argv, "%d", &num) == 0) || (num <= 0))) 229 goto bad; 230 argv++; 231 argc--; 232 } 233 234 if (badops) { 235 bad: 236 BIO_printf(bio_err, "%s [options] [numbits]\n", prog); 237 BIO_printf(bio_err, "where options are\n"); 238 BIO_printf(bio_err, " -inform arg input format - one of DER PEM\n"); 239 BIO_printf(bio_err, 240 " -outform arg output format - one of DER PEM\n"); 241 BIO_printf(bio_err, " -in arg input file\n"); 242 BIO_printf(bio_err, " -out arg output file\n"); 243 # ifndef OPENSSL_NO_DSA 244 BIO_printf(bio_err, 245 " -dsaparam read or generate DSA parameters, convert to DH\n"); 246 # endif 247 BIO_printf(bio_err, " -check check the DH parameters\n"); 248 BIO_printf(bio_err, 249 " -text print a text form of the DH parameters\n"); 250 BIO_printf(bio_err, " -C Output C code\n"); 251 BIO_printf(bio_err, 252 " -2 generate parameters using 2 as the generator value\n"); 253 BIO_printf(bio_err, 254 " -5 generate parameters using 5 as the generator value\n"); 255 BIO_printf(bio_err, 256 " numbits number of bits in to generate (default 2048)\n"); 257 # ifndef OPENSSL_NO_ENGINE 258 BIO_printf(bio_err, 259 " -engine e use engine e, possibly a hardware device.\n"); 260 # endif 261 BIO_printf(bio_err, " -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, 262 LIST_SEPARATOR_CHAR); 263 BIO_printf(bio_err, 264 " - load the file (or the files in the directory) into\n"); 265 BIO_printf(bio_err, " the random number generator\n"); 266 BIO_printf(bio_err, " -noout no output\n"); 267 goto end; 268 } 269 270 ERR_load_crypto_strings(); 271 272 e = setup_engine(bio_err, engine, 0); 273 274 if (g && !num) 275 num = DEFBITS; 276 277 # ifndef OPENSSL_NO_DSA 278 if (dsaparam) { 279 if (g) { 280 BIO_printf(bio_err, 281 "generator may not be chosen for DSA parameters\n"); 282 goto end; 283 } 284 } else 285 # endif 286 { 287 /* DH parameters */ 288 if (num && !g) 289 g = 2; 290 } 291 292 if (num) { 293 294 BN_GENCB cb; 295 BN_GENCB_set(&cb, dh_cb, bio_err); 296 if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL) { 297 BIO_printf(bio_err, 298 "warning, not much extra random data, consider using the -rand option\n"); 299 } 300 if (inrand != NULL) 301 BIO_printf(bio_err, "%ld semi-random bytes loaded\n", 302 app_RAND_load_files(inrand)); 303 304 # ifndef OPENSSL_NO_DSA 305 if (dsaparam) { 306 DSA *dsa = DSA_new(); 307 308 BIO_printf(bio_err, 309 "Generating DSA parameters, %d bit long prime\n", num); 310 if (!dsa 311 || !DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL, 312 &cb)) { 313 if (dsa) 314 DSA_free(dsa); 315 ERR_print_errors(bio_err); 316 goto end; 317 } 318 319 dh = DSA_dup_DH(dsa); 320 DSA_free(dsa); 321 if (dh == NULL) { 322 ERR_print_errors(bio_err); 323 goto end; 324 } 325 } else 326 # endif 327 { 328 dh = DH_new(); 329 BIO_printf(bio_err, 330 "Generating DH parameters, %d bit long safe prime, generator %d\n", 331 num, g); 332 BIO_printf(bio_err, "This is going to take a long time\n"); 333 if (!dh || !DH_generate_parameters_ex(dh, num, g, &cb)) { 334 ERR_print_errors(bio_err); 335 goto end; 336 } 337 } 338 339 app_RAND_write_file(NULL, bio_err); 340 } else { 341 342 in = BIO_new(BIO_s_file()); 343 if (in == NULL) { 344 ERR_print_errors(bio_err); 345 goto end; 346 } 347 if (infile == NULL) 348 BIO_set_fp(in, stdin, BIO_NOCLOSE); 349 else { 350 if (BIO_read_filename(in, infile) <= 0) { 351 perror(infile); 352 goto end; 353 } 354 } 355 356 if (informat != FORMAT_ASN1 && informat != FORMAT_PEM) { 357 BIO_printf(bio_err, "bad input format specified\n"); 358 goto end; 359 } 360 # ifndef OPENSSL_NO_DSA 361 if (dsaparam) { 362 DSA *dsa; 363 364 if (informat == FORMAT_ASN1) 365 dsa = d2i_DSAparams_bio(in, NULL); 366 else /* informat == FORMAT_PEM */ 367 dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL); 368 369 if (dsa == NULL) { 370 BIO_printf(bio_err, "unable to load DSA parameters\n"); 371 ERR_print_errors(bio_err); 372 goto end; 373 } 374 375 dh = DSA_dup_DH(dsa); 376 DSA_free(dsa); 377 if (dh == NULL) { 378 ERR_print_errors(bio_err); 379 goto end; 380 } 381 } else 382 # endif 383 { 384 if (informat == FORMAT_ASN1) { 385 /* 386 * We have no PEM header to determine what type of DH params it 387 * is. We'll just try both. 388 */ 389 dh = d2i_DHparams_bio(in, NULL); 390 /* BIO_reset() returns 0 for success for file BIOs only!!! */ 391 if (dh == NULL && BIO_reset(in) == 0) 392 dh = d2i_DHxparams_bio(in, NULL); 393 } else { 394 /* informat == FORMAT_PEM */ 395 dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL); 396 } 397 398 if (dh == NULL) { 399 BIO_printf(bio_err, "unable to load DH parameters\n"); 400 ERR_print_errors(bio_err); 401 goto end; 402 } 403 } 404 405 /* dh != NULL */ 406 } 407 408 out = BIO_new(BIO_s_file()); 409 if (out == NULL) { 410 ERR_print_errors(bio_err); 411 goto end; 412 } 413 if (outfile == NULL) { 414 BIO_set_fp(out, stdout, BIO_NOCLOSE); 415 # ifdef OPENSSL_SYS_VMS 416 { 417 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 418 out = BIO_push(tmpbio, out); 419 } 420 # endif 421 } else { 422 if (BIO_write_filename(out, outfile) <= 0) { 423 perror(outfile); 424 goto end; 425 } 426 } 427 428 if (text) { 429 DHparams_print(out, dh); 430 } 431 432 if (check) { 433 if (!DH_check(dh, &i)) { 434 ERR_print_errors(bio_err); 435 goto end; 436 } 437 if (i & DH_CHECK_P_NOT_PRIME) 438 printf("p value is not prime\n"); 439 if (i & DH_CHECK_P_NOT_SAFE_PRIME) 440 printf("p value is not a safe prime\n"); 441 if (i & DH_UNABLE_TO_CHECK_GENERATOR) 442 printf("unable to check the generator value\n"); 443 if (i & DH_NOT_SUITABLE_GENERATOR) 444 printf("the g value is not a generator\n"); 445 if (i == 0) 446 printf("DH parameters appear to be ok.\n"); 447 } 448 if (C) { 449 unsigned char *data; 450 int len, l, bits; 451 452 len = BN_num_bytes(dh->p); 453 bits = BN_num_bits(dh->p); 454 data = (unsigned char *)OPENSSL_malloc(len); 455 if (data == NULL) { 456 perror("OPENSSL_malloc"); 457 goto end; 458 } 459 printf("#ifndef HEADER_DH_H\n" 460 "#include <openssl/dh.h>\n" "#endif\n"); 461 printf("DH *get_dh%d()\n\t{\n", bits); 462 463 l = BN_bn2bin(dh->p, data); 464 printf("\tstatic unsigned char dh%d_p[]={", bits); 465 for (i = 0; i < l; i++) { 466 if ((i % 12) == 0) 467 printf("\n\t\t"); 468 printf("0x%02X,", data[i]); 469 } 470 printf("\n\t\t};\n"); 471 472 l = BN_bn2bin(dh->g, data); 473 printf("\tstatic unsigned char dh%d_g[]={", bits); 474 for (i = 0; i < l; i++) { 475 if ((i % 12) == 0) 476 printf("\n\t\t"); 477 printf("0x%02X,", data[i]); 478 } 479 printf("\n\t\t};\n"); 480 481 printf("\tDH *dh;\n\n"); 482 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n"); 483 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n", 484 bits, bits); 485 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n", 486 bits, bits); 487 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n"); 488 printf("\t\t{ DH_free(dh); return(NULL); }\n"); 489 if (dh->length) 490 printf("\tdh->length = %ld;\n", dh->length); 491 printf("\treturn(dh);\n\t}\n"); 492 OPENSSL_free(data); 493 } 494 495 if (!noout) { 496 if (outformat == FORMAT_ASN1) { 497 if (dh->q != NULL) 498 i = i2d_DHxparams_bio(out, dh); 499 else 500 i = i2d_DHparams_bio(out, dh); 501 } else if (outformat == FORMAT_PEM) { 502 if (dh->q != NULL) 503 i = PEM_write_bio_DHxparams(out, dh); 504 else 505 i = PEM_write_bio_DHparams(out, dh); 506 } else { 507 BIO_printf(bio_err, "bad output format specified for outfile\n"); 508 goto end; 509 } 510 if (!i) { 511 BIO_printf(bio_err, "unable to write DH parameters\n"); 512 ERR_print_errors(bio_err); 513 goto end; 514 } 515 } 516 ret = 0; 517 end: 518 if (in != NULL) 519 BIO_free(in); 520 if (out != NULL) 521 BIO_free_all(out); 522 if (dh != NULL) 523 DH_free(dh); 524 release_engine(e); 525 apps_shutdown(); 526 OPENSSL_EXIT(ret); 527 } 528 529 /* dh_cb is identical to dsa_cb in apps/dsaparam.c */ 530 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb) 531 { 532 char c = '*'; 533 534 if (p == 0) 535 c = '.'; 536 if (p == 1) 537 c = '+'; 538 if (p == 2) 539 c = '*'; 540 if (p == 3) 541 c = '\n'; 542 BIO_write(cb->arg, &c, 1); 543 (void)BIO_flush(cb->arg); 544 # ifdef LINT 545 p = n; 546 # endif 547 return 1; 548 } 549 550 #else /* !OPENSSL_NO_DH */ 551 552 # if PEDANTIC 553 static void *dummy = &dummy; 554 # endif 555 556 #endif 557