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 512 134 135/* -inform arg - input format - default PEM (DER or PEM) 136 * -outform arg - output format - default PEM 137 * -in arg - input file - default stdin 138 * -out arg - output file - default stdout 139 * -dsaparam - read or generate DSA parameters, convert to DH 140 * -check - check the parameters are ok 141 * -noout 142 * -text 143 * -C 144 */ 145 146static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb); 147 148int MAIN(int, char **); 149 150int MAIN(int argc, char **argv) 151 { 152 DH *dh=NULL; 153 int i,badops=0,text=0; 154#ifndef OPENSSL_NO_DSA 155 int dsaparam=0; 156#endif 157 BIO *in=NULL,*out=NULL; 158 int informat,outformat,check=0,noout=0,C=0,ret=1; 159 char *infile,*outfile,*prog; 160 char *inrand=NULL; 161#ifndef OPENSSL_NO_ENGINE 162 char *engine=NULL; 163#endif 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 { 185 if (strcmp(*argv,"-inform") == 0) 186 { 187 if (--argc < 1) goto bad; 188 informat=str2fmt(*(++argv)); 189 } 190 else if (strcmp(*argv,"-outform") == 0) 191 { 192 if (--argc < 1) goto bad; 193 outformat=str2fmt(*(++argv)); 194 } 195 else if (strcmp(*argv,"-in") == 0) 196 { 197 if (--argc < 1) goto bad; 198 infile= *(++argv); 199 } 200 else if (strcmp(*argv,"-out") == 0) 201 { 202 if (--argc < 1) goto bad; 203 outfile= *(++argv); 204 } 205#ifndef OPENSSL_NO_ENGINE 206 else if (strcmp(*argv,"-engine") == 0) 207 { 208 if (--argc < 1) goto bad; 209 engine= *(++argv); 210 } 211#endif 212 else if (strcmp(*argv,"-check") == 0) 213 check=1; 214 else if (strcmp(*argv,"-text") == 0) 215 text=1; 216#ifndef OPENSSL_NO_DSA 217 else if (strcmp(*argv,"-dsaparam") == 0) 218 dsaparam=1; 219#endif 220 else if (strcmp(*argv,"-C") == 0) 221 C=1; 222 else if (strcmp(*argv,"-noout") == 0) 223 noout=1; 224 else if (strcmp(*argv,"-2") == 0) 225 g=2; 226 else if (strcmp(*argv,"-5") == 0) 227 g=5; 228 else if (strcmp(*argv,"-rand") == 0) 229 { 230 if (--argc < 1) goto bad; 231 inrand= *(++argv); 232 } 233 else if (((sscanf(*argv,"%d",&num) == 0) || (num <= 0))) 234 goto bad; 235 argv++; 236 argc--; 237 } 238 239 if (badops) 240 { 241bad: 242 BIO_printf(bio_err,"%s [options] [numbits]\n",prog); 243 BIO_printf(bio_err,"where options are\n"); 244 BIO_printf(bio_err," -inform arg input format - one of DER PEM\n"); 245 BIO_printf(bio_err," -outform arg output format - one of DER PEM\n"); 246 BIO_printf(bio_err," -in arg input file\n"); 247 BIO_printf(bio_err," -out arg output file\n"); 248#ifndef OPENSSL_NO_DSA 249 BIO_printf(bio_err," -dsaparam read or generate DSA parameters, convert to DH\n"); 250#endif 251 BIO_printf(bio_err," -check check the DH parameters\n"); 252 BIO_printf(bio_err," -text print a text form of the DH parameters\n"); 253 BIO_printf(bio_err," -C Output C code\n"); 254 BIO_printf(bio_err," -2 generate parameters using 2 as the generator value\n"); 255 BIO_printf(bio_err," -5 generate parameters using 5 as the generator value\n"); 256 BIO_printf(bio_err," numbits number of bits in to generate (default 512)\n"); 257#ifndef OPENSSL_NO_ENGINE 258 BIO_printf(bio_err," -engine e use engine e, possibly a hardware device.\n"); 259#endif 260 BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR); 261 BIO_printf(bio_err," - load the file (or the files in the directory) into\n"); 262 BIO_printf(bio_err," the random number generator\n"); 263 BIO_printf(bio_err," -noout no output\n"); 264 goto end; 265 } 266 267 ERR_load_crypto_strings(); 268 269#ifndef OPENSSL_NO_ENGINE 270 setup_engine(bio_err, engine, 0); 271#endif 272 273 if (g && !num) 274 num = DEFBITS; 275 276#ifndef OPENSSL_NO_DSA 277 if (dsaparam) 278 { 279 if (g) 280 { 281 BIO_printf(bio_err, "generator may not be chosen for DSA parameters\n"); 282 goto end; 283 } 284 } 285 else 286#endif 287 { 288 /* DH parameters */ 289 if (num && !g) 290 g = 2; 291 } 292 293 if(num) { 294 295 BN_GENCB cb; 296 BN_GENCB_set(&cb, dh_cb, bio_err); 297 if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL) 298 { 299 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n"); 300 } 301 if (inrand != NULL) 302 BIO_printf(bio_err,"%ld semi-random bytes loaded\n", 303 app_RAND_load_files(inrand)); 304 305#ifndef OPENSSL_NO_DSA 306 if (dsaparam) 307 { 308 DSA *dsa = DSA_new(); 309 310 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num); 311 if(!dsa || !DSA_generate_parameters_ex(dsa, num, 312 NULL, 0, NULL, NULL, &cb)) 313 { 314 if(dsa) 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 { 323 ERR_print_errors(bio_err); 324 goto end; 325 } 326 } 327 else 328#endif 329 { 330 dh = DH_new(); 331 BIO_printf(bio_err,"Generating DH parameters, %d bit long safe prime, generator %d\n",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 { 335 if(dh) DH_free(dh); 336 ERR_print_errors(bio_err); 337 goto end; 338 } 339 } 340 341 app_RAND_write_file(NULL, bio_err); 342 } else { 343 344 in=BIO_new(BIO_s_file()); 345 if (in == NULL) 346 { 347 ERR_print_errors(bio_err); 348 goto end; 349 } 350 if (infile == NULL) 351 BIO_set_fp(in,stdin,BIO_NOCLOSE); 352 else 353 { 354 if (BIO_read_filename(in,infile) <= 0) 355 { 356 perror(infile); 357 goto end; 358 } 359 } 360 361 if (informat != FORMAT_ASN1 && informat != FORMAT_PEM) 362 { 363 BIO_printf(bio_err,"bad input format specified\n"); 364 goto end; 365 } 366 367#ifndef OPENSSL_NO_DSA 368 if (dsaparam) 369 { 370 DSA *dsa; 371 372 if (informat == FORMAT_ASN1) 373 dsa=d2i_DSAparams_bio(in,NULL); 374 else /* informat == FORMAT_PEM */ 375 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL); 376 377 if (dsa == NULL) 378 { 379 BIO_printf(bio_err,"unable to load DSA parameters\n"); 380 ERR_print_errors(bio_err); 381 goto end; 382 } 383 384 dh = DSA_dup_DH(dsa); 385 DSA_free(dsa); 386 if (dh == NULL) 387 { 388 ERR_print_errors(bio_err); 389 goto end; 390 } 391 } 392 else 393#endif 394 { 395 if (informat == FORMAT_ASN1) 396 dh=d2i_DHparams_bio(in,NULL); 397 else /* informat == FORMAT_PEM */ 398 dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL); 399 400 if (dh == NULL) 401 { 402 BIO_printf(bio_err,"unable to load DH parameters\n"); 403 ERR_print_errors(bio_err); 404 goto end; 405 } 406 } 407 408 /* dh != NULL */ 409 } 410 411 out=BIO_new(BIO_s_file()); 412 if (out == NULL) 413 { 414 ERR_print_errors(bio_err); 415 goto end; 416 } 417 if (outfile == NULL) 418 { 419 BIO_set_fp(out,stdout,BIO_NOCLOSE); 420#ifdef OPENSSL_SYS_VMS 421 { 422 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 423 out = BIO_push(tmpbio, out); 424 } 425#endif 426 } 427 else 428 { 429 if (BIO_write_filename(out,outfile) <= 0) 430 { 431 perror(outfile); 432 goto end; 433 } 434 } 435 436 437 if (text) 438 { 439 DHparams_print(out,dh); 440 } 441 442 if (check) 443 { 444 if (!DH_check(dh,&i)) 445 { 446 ERR_print_errors(bio_err); 447 goto end; 448 } 449 if (i & DH_CHECK_P_NOT_PRIME) 450 printf("p value is not prime\n"); 451 if (i & DH_CHECK_P_NOT_SAFE_PRIME) 452 printf("p value is not a safe prime\n"); 453 if (i & DH_UNABLE_TO_CHECK_GENERATOR) 454 printf("unable to check the generator value\n"); 455 if (i & DH_NOT_SUITABLE_GENERATOR) 456 printf("the g value is not a generator\n"); 457 if (i == 0) 458 printf("DH parameters appear to be ok.\n"); 459 } 460 if (C) 461 { 462 unsigned char *data; 463 int len,l,bits; 464 465 len=BN_num_bytes(dh->p); 466 bits=BN_num_bits(dh->p); 467 data=(unsigned char *)OPENSSL_malloc(len); 468 if (data == NULL) 469 { 470 perror("OPENSSL_malloc"); 471 goto end; 472 } 473 printf("#ifndef HEADER_DH_H\n" 474 "#include <openssl/dh.h>\n" 475 "#endif\n"); 476 printf("DH *get_dh%d()\n\t{\n",bits); 477 478 l=BN_bn2bin(dh->p,data); 479 printf("\tstatic unsigned char dh%d_p[]={",bits); 480 for (i=0; i<l; i++) 481 { 482 if ((i%12) == 0) printf("\n\t\t"); 483 printf("0x%02X,",data[i]); 484 } 485 printf("\n\t\t};\n"); 486 487 l=BN_bn2bin(dh->g,data); 488 printf("\tstatic unsigned char dh%d_g[]={",bits); 489 for (i=0; i<l; i++) 490 { 491 if ((i%12) == 0) printf("\n\t\t"); 492 printf("0x%02X,",data[i]); 493 } 494 printf("\n\t\t};\n"); 495 496 printf("\tDH *dh;\n\n"); 497 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n"); 498 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n", 499 bits,bits); 500 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n", 501 bits,bits); 502 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n"); 503 printf("\t\t{ DH_free(dh); return(NULL); }\n"); 504 if (dh->length) 505 printf("\tdh->length = %ld;\n", dh->length); 506 printf("\treturn(dh);\n\t}\n"); 507 OPENSSL_free(data); 508 } 509 510 511 if (!noout) 512 { 513 if (outformat == FORMAT_ASN1) 514 i=i2d_DHparams_bio(out,dh); 515 else if (outformat == FORMAT_PEM) 516 i=PEM_write_bio_DHparams(out,dh); 517 else { 518 BIO_printf(bio_err,"bad output format specified for outfile\n"); 519 goto end; 520 } 521 if (!i) 522 { 523 BIO_printf(bio_err,"unable to write DH parameters\n"); 524 ERR_print_errors(bio_err); 525 goto end; 526 } 527 } 528 ret=0; 529end: 530 if (in != NULL) BIO_free(in); 531 if (out != NULL) BIO_free_all(out); 532 if (dh != NULL) DH_free(dh); 533 apps_shutdown(); 534 OPENSSL_EXIT(ret); 535 } 536 537/* dh_cb is identical to dsa_cb in apps/dsaparam.c */ 538static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb) 539 { 540 char c='*'; 541 542 if (p == 0) c='.'; 543 if (p == 1) c='+'; 544 if (p == 2) c='*'; 545 if (p == 3) c='\n'; 546 BIO_write(cb->arg,&c,1); 547 (void)BIO_flush(cb->arg); 548#ifdef LINT 549 p=n; 550#endif 551 return 1; 552 } 553 554#else /* !OPENSSL_NO_DH */ 555 556# if PEDANTIC 557static void *dummy=&dummy; 558# endif 559 560#endif 561