dhparam.c revision 284295
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/* -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 2048)\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 ERR_print_errors(bio_err); 336 goto end; 337 } 338 } 339 340 app_RAND_write_file(NULL, bio_err); 341 } else { 342 343 in=BIO_new(BIO_s_file()); 344 if (in == NULL) 345 { 346 ERR_print_errors(bio_err); 347 goto end; 348 } 349 if (infile == NULL) 350 BIO_set_fp(in,stdin,BIO_NOCLOSE); 351 else 352 { 353 if (BIO_read_filename(in,infile) <= 0) 354 { 355 perror(infile); 356 goto end; 357 } 358 } 359 360 if (informat != FORMAT_ASN1 && informat != FORMAT_PEM) 361 { 362 BIO_printf(bio_err,"bad input format specified\n"); 363 goto end; 364 } 365 366#ifndef OPENSSL_NO_DSA 367 if (dsaparam) 368 { 369 DSA *dsa; 370 371 if (informat == FORMAT_ASN1) 372 dsa=d2i_DSAparams_bio(in,NULL); 373 else /* informat == FORMAT_PEM */ 374 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL); 375 376 if (dsa == NULL) 377 { 378 BIO_printf(bio_err,"unable to load DSA parameters\n"); 379 ERR_print_errors(bio_err); 380 goto end; 381 } 382 383 dh = DSA_dup_DH(dsa); 384 DSA_free(dsa); 385 if (dh == NULL) 386 { 387 ERR_print_errors(bio_err); 388 goto end; 389 } 390 } 391 else 392#endif 393 { 394 if (informat == FORMAT_ASN1) 395 dh=d2i_DHparams_bio(in,NULL); 396 else /* informat == FORMAT_PEM */ 397 dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL); 398 399 if (dh == NULL) 400 { 401 BIO_printf(bio_err,"unable to load DH parameters\n"); 402 ERR_print_errors(bio_err); 403 goto end; 404 } 405 } 406 407 /* dh != NULL */ 408 } 409 410 out=BIO_new(BIO_s_file()); 411 if (out == NULL) 412 { 413 ERR_print_errors(bio_err); 414 goto end; 415 } 416 if (outfile == NULL) 417 { 418 BIO_set_fp(out,stdout,BIO_NOCLOSE); 419#ifdef OPENSSL_SYS_VMS 420 { 421 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 422 out = BIO_push(tmpbio, out); 423 } 424#endif 425 } 426 else 427 { 428 if (BIO_write_filename(out,outfile) <= 0) 429 { 430 perror(outfile); 431 goto end; 432 } 433 } 434 435 436 if (text) 437 { 438 DHparams_print(out,dh); 439 } 440 441 if (check) 442 { 443 if (!DH_check(dh,&i)) 444 { 445 ERR_print_errors(bio_err); 446 goto end; 447 } 448 if (i & DH_CHECK_P_NOT_PRIME) 449 printf("p value is not prime\n"); 450 if (i & DH_CHECK_P_NOT_SAFE_PRIME) 451 printf("p value is not a safe prime\n"); 452 if (i & DH_UNABLE_TO_CHECK_GENERATOR) 453 printf("unable to check the generator value\n"); 454 if (i & DH_NOT_SUITABLE_GENERATOR) 455 printf("the g value is not a generator\n"); 456 if (i == 0) 457 printf("DH parameters appear to be ok.\n"); 458 } 459 if (C) 460 { 461 unsigned char *data; 462 int len,l,bits; 463 464 len=BN_num_bytes(dh->p); 465 bits=BN_num_bits(dh->p); 466 data=(unsigned char *)OPENSSL_malloc(len); 467 if (data == NULL) 468 { 469 perror("OPENSSL_malloc"); 470 goto end; 471 } 472 printf("#ifndef HEADER_DH_H\n" 473 "#include <openssl/dh.h>\n" 474 "#endif\n"); 475 printf("DH *get_dh%d()\n\t{\n",bits); 476 477 l=BN_bn2bin(dh->p,data); 478 printf("\tstatic unsigned char dh%d_p[]={",bits); 479 for (i=0; i<l; i++) 480 { 481 if ((i%12) == 0) printf("\n\t\t"); 482 printf("0x%02X,",data[i]); 483 } 484 printf("\n\t\t};\n"); 485 486 l=BN_bn2bin(dh->g,data); 487 printf("\tstatic unsigned char dh%d_g[]={",bits); 488 for (i=0; i<l; i++) 489 { 490 if ((i%12) == 0) printf("\n\t\t"); 491 printf("0x%02X,",data[i]); 492 } 493 printf("\n\t\t};\n"); 494 495 printf("\tDH *dh;\n\n"); 496 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n"); 497 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n", 498 bits,bits); 499 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n", 500 bits,bits); 501 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n"); 502 printf("\t\t{ DH_free(dh); return(NULL); }\n"); 503 if (dh->length) 504 printf("\tdh->length = %ld;\n", dh->length); 505 printf("\treturn(dh);\n\t}\n"); 506 OPENSSL_free(data); 507 } 508 509 510 if (!noout) 511 { 512 if (outformat == FORMAT_ASN1) 513 i=i2d_DHparams_bio(out,dh); 514 else if (outformat == FORMAT_PEM) 515 i=PEM_write_bio_DHparams(out,dh); 516 else { 517 BIO_printf(bio_err,"bad output format specified for outfile\n"); 518 goto end; 519 } 520 if (!i) 521 { 522 BIO_printf(bio_err,"unable to write DH parameters\n"); 523 ERR_print_errors(bio_err); 524 goto end; 525 } 526 } 527 ret=0; 528end: 529 if (in != NULL) BIO_free(in); 530 if (out != NULL) BIO_free_all(out); 531 if (dh != NULL) DH_free(dh); 532 apps_shutdown(); 533 OPENSSL_EXIT(ret); 534 } 535 536/* dh_cb is identical to dsa_cb in apps/dsaparam.c */ 537static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb) 538 { 539 char c='*'; 540 541 if (p == 0) c='.'; 542 if (p == 1) c='+'; 543 if (p == 2) c='*'; 544 if (p == 3) c='\n'; 545 BIO_write(cb->arg,&c,1); 546 (void)BIO_flush(cb->arg); 547#ifdef LINT 548 p=n; 549#endif 550 return 1; 551 } 552 553#else /* !OPENSSL_NO_DH */ 554 555# if PEDANTIC 556static void *dummy=&dummy; 557# endif 558 559#endif 560