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 #ifndef OPENSSL_NO_DH 113 #include <stdio.h> 114 #include <stdlib.h> 115 #include <time.h> 116 #include <string.h> 117 #include "apps.h" 118 #include <openssl/bio.h> 119 #include <openssl/err.h> 120 #include <openssl/bn.h> 121 #include <openssl/dh.h> 122 #include <openssl/x509.h> 123 #include <openssl/pem.h> 124 125 #ifndef OPENSSL_NO_DSA 126 #include <openssl/dsa.h> 127 #endif 128 129 #undef PROG 130 #define PROG dhparam_main 131 132 #define DEFBITS 512 133 134 /* -inform arg - input format - default PEM (DER or PEM) 135 * -outform arg - output format - default PEM 136 * -in arg - input file - default stdin 137 * -out arg - output file - default stdout 138 * -dsaparam - read or generate DSA parameters, convert to DH 139 * -check - check the parameters are ok 140 * -noout 141 * -text 142 * -C 143 */ 144 145 static void MS_CALLBACK dh_cb(int p, int n, void *arg); 146 147 int MAIN(int, char **); 148 149 int MAIN(int argc, char **argv) 150 { 151 #ifndef OPENSSL_NO_ENGINE 152 ENGINE *e = NULL; 153 #endif 154 DH *dh=NULL; 155 int i,badops=0,text=0; 156 #ifndef OPENSSL_NO_DSA 157 int dsaparam=0; 158 #endif 159 BIO *in=NULL,*out=NULL; 160 int informat,outformat,check=0,noout=0,C=0,ret=1; 161 char *infile,*outfile,*prog; 162 char *inrand=NULL; 163 #ifndef OPENSSL_NO_ENGINE 164 char *engine=NULL; 165 #endif 166 int num = 0, g = 0; 167 168 apps_startup(); 169 170 if (bio_err == NULL) 171 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 172 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 173 174 if (!load_config(bio_err, NULL)) 175 goto end; 176 177 infile=NULL; 178 outfile=NULL; 179 informat=FORMAT_PEM; 180 outformat=FORMAT_PEM; 181 182 prog=argv[0]; 183 argc--; 184 argv++; 185 while (argc >= 1) 186 { 187 if (strcmp(*argv,"-inform") == 0) 188 { 189 if (--argc < 1) goto bad; 190 informat=str2fmt(*(++argv)); 191 } 192 else if (strcmp(*argv,"-outform") == 0) 193 { 194 if (--argc < 1) goto bad; 195 outformat=str2fmt(*(++argv)); 196 } 197 else if (strcmp(*argv,"-in") == 0) 198 { 199 if (--argc < 1) goto bad; 200 infile= *(++argv); 201 } 202 else if (strcmp(*argv,"-out") == 0) 203 { 204 if (--argc < 1) goto bad; 205 outfile= *(++argv); 206 } 207 #ifndef OPENSSL_NO_ENGINE 208 else if (strcmp(*argv,"-engine") == 0) 209 { 210 if (--argc < 1) goto bad; 211 engine= *(++argv); 212 } 213 #endif 214 else if (strcmp(*argv,"-check") == 0) 215 check=1; 216 else if (strcmp(*argv,"-text") == 0) 217 text=1; 218 #ifndef OPENSSL_NO_DSA 219 else if (strcmp(*argv,"-dsaparam") == 0) 220 dsaparam=1; 221 #endif 222 else if (strcmp(*argv,"-C") == 0) 223 C=1; 224 else if (strcmp(*argv,"-noout") == 0) 225 noout=1; 226 else if (strcmp(*argv,"-2") == 0) 227 g=2; 228 else if (strcmp(*argv,"-5") == 0) 229 g=5; 230 else if (strcmp(*argv,"-rand") == 0) 231 { 232 if (--argc < 1) goto bad; 233 inrand= *(++argv); 234 } 235 else if (((sscanf(*argv,"%d",&num) == 0) || (num <= 0))) 236 goto bad; 237 argv++; 238 argc--; 239 } 240 241 if (badops) 242 { 243 bad: 244 BIO_printf(bio_err,"%s [options] [numbits]\n",prog); 245 BIO_printf(bio_err,"where options are\n"); 246 BIO_printf(bio_err," -inform arg input format - one of DER PEM\n"); 247 BIO_printf(bio_err," -outform arg output format - one of DER PEM\n"); 248 BIO_printf(bio_err," -in arg input file\n"); 249 BIO_printf(bio_err," -out arg output file\n"); 250 #ifndef OPENSSL_NO_DSA 251 BIO_printf(bio_err," -dsaparam read or generate DSA parameters, convert to DH\n"); 252 #endif 253 BIO_printf(bio_err," -check check the DH parameters\n"); 254 BIO_printf(bio_err," -text print a text form of the DH parameters\n"); 255 BIO_printf(bio_err," -C Output C code\n"); 256 BIO_printf(bio_err," -2 generate parameters using 2 as the generator value\n"); 257 BIO_printf(bio_err," -5 generate parameters using 5 as the generator value\n"); 258 BIO_printf(bio_err," numbits number of bits in to generate (default 512)\n"); 259 #ifndef OPENSSL_NO_ENGINE 260 BIO_printf(bio_err," -engine e use engine e, possibly a hardware device.\n"); 261 #endif 262 BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR); 263 BIO_printf(bio_err," - load the file (or the files in the directory) into\n"); 264 BIO_printf(bio_err," the random number generator\n"); 265 BIO_printf(bio_err," -noout no output\n"); 266 goto end; 267 } 268 269 ERR_load_crypto_strings(); 270 271 #ifndef OPENSSL_NO_ENGINE 272 e = setup_engine(bio_err, engine, 0); 273 #endif 274 275 if (g && !num) 276 num = DEFBITS; 277 278 #ifndef OPENSSL_NO_DSA 279 if (dsaparam) 280 { 281 if (g) 282 { 283 BIO_printf(bio_err, "generator may not be chosen for DSA parameters\n"); 284 goto end; 285 } 286 } 287 else 288 #endif 289 { 290 /* DH parameters */ 291 if (num && !g) 292 g = 2; 293 } 294 295 if(num) { 296 297 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; 309 310 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num); 311 dsa = DSA_generate_parameters(num, NULL, 0, NULL, NULL, dh_cb, bio_err); 312 if (dsa == NULL) 313 { 314 ERR_print_errors(bio_err); 315 goto end; 316 } 317 318 dh = DSA_dup_DH(dsa); 319 DSA_free(dsa); 320 if (dh == NULL) 321 { 322 ERR_print_errors(bio_err); 323 goto end; 324 } 325 } 326 else 327 #endif 328 { 329 BIO_printf(bio_err,"Generating DH parameters, %d bit long safe prime, generator %d\n",num,g); 330 BIO_printf(bio_err,"This is going to take a long time\n"); 331 dh=DH_generate_parameters(num,g,dh_cb,bio_err); 332 333 if (dh == NULL) 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; 528 end: 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 */ 537 static void MS_CALLBACK dh_cb(int p, int n, void *arg) 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((BIO *)arg,&c,1); 546 (void)BIO_flush((BIO *)arg); 547 #ifdef LINT 548 p=n; 549 #endif 550 } 551 552 #endif 553