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 */ 145 146 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb); 147 148 int MAIN(int, char **); 149 150 int MAIN(int argc, char **argv) 151 { 152 #ifndef OPENSSL_NO_ENGINE 153 ENGINE *e = NULL; 154 #endif 155 DH *dh=NULL; 156 int i,badops=0,text=0; 157 #ifndef OPENSSL_NO_DSA 158 int dsaparam=0; 159 #endif 160 BIO *in=NULL,*out=NULL; 161 int informat,outformat,check=0,noout=0,C=0,ret=1; 162 char *infile,*outfile,*prog; 163 char *inrand=NULL; 164 #ifndef OPENSSL_NO_ENGINE 165 char *engine=NULL; 166 #endif 167 int num = 0, g = 0; 168 169 apps_startup(); 170 171 if (bio_err == NULL) 172 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 173 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 174 175 if (!load_config(bio_err, NULL)) 176 goto end; 177 178 infile=NULL; 179 outfile=NULL; 180 informat=FORMAT_PEM; 181 outformat=FORMAT_PEM; 182 183 prog=argv[0]; 184 argc--; 185 argv++; 186 while (argc >= 1) 187 { 188 if (strcmp(*argv,"-inform") == 0) 189 { 190 if (--argc < 1) goto bad; 191 informat=str2fmt(*(++argv)); 192 } 193 else if (strcmp(*argv,"-outform") == 0) 194 { 195 if (--argc < 1) goto bad; 196 outformat=str2fmt(*(++argv)); 197 } 198 else if (strcmp(*argv,"-in") == 0) 199 { 200 if (--argc < 1) goto bad; 201 infile= *(++argv); 202 } 203 else if (strcmp(*argv,"-out") == 0) 204 { 205 if (--argc < 1) goto bad; 206 outfile= *(++argv); 207 } 208 #ifndef OPENSSL_NO_ENGINE 209 else if (strcmp(*argv,"-engine") == 0) 210 { 211 if (--argc < 1) goto bad; 212 engine= *(++argv); 213 } 214 #endif 215 else if (strcmp(*argv,"-check") == 0) 216 check=1; 217 else if (strcmp(*argv,"-text") == 0) 218 text=1; 219 #ifndef OPENSSL_NO_DSA 220 else if (strcmp(*argv,"-dsaparam") == 0) 221 dsaparam=1; 222 #endif 223 else if (strcmp(*argv,"-C") == 0) 224 C=1; 225 else if (strcmp(*argv,"-noout") == 0) 226 noout=1; 227 else if (strcmp(*argv,"-2") == 0) 228 g=2; 229 else if (strcmp(*argv,"-5") == 0) 230 g=5; 231 else if (strcmp(*argv,"-rand") == 0) 232 { 233 if (--argc < 1) goto bad; 234 inrand= *(++argv); 235 } 236 else if (((sscanf(*argv,"%d",&num) == 0) || (num <= 0))) 237 goto bad; 238 argv++; 239 argc--; 240 } 241 242 if (badops) 243 { 244 bad: 245 BIO_printf(bio_err,"%s [options] [numbits]\n",prog); 246 BIO_printf(bio_err,"where options are\n"); 247 BIO_printf(bio_err," -inform arg input format - one of DER PEM\n"); 248 BIO_printf(bio_err," -outform arg output format - one of DER PEM\n"); 249 BIO_printf(bio_err," -in arg input file\n"); 250 BIO_printf(bio_err," -out arg output file\n"); 251 #ifndef OPENSSL_NO_DSA 252 BIO_printf(bio_err," -dsaparam read or generate DSA parameters, convert to DH\n"); 253 #endif 254 BIO_printf(bio_err," -check check the DH parameters\n"); 255 BIO_printf(bio_err," -text print a text form of the DH parameters\n"); 256 BIO_printf(bio_err," -C Output C code\n"); 257 BIO_printf(bio_err," -2 generate parameters using 2 as the generator value\n"); 258 BIO_printf(bio_err," -5 generate parameters using 5 as the generator value\n"); 259 BIO_printf(bio_err," numbits number of bits in to generate (default 512)\n"); 260 #ifndef OPENSSL_NO_ENGINE 261 BIO_printf(bio_err," -engine e use engine e, possibly a hardware device.\n"); 262 #endif 263 BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR); 264 BIO_printf(bio_err," - 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 #ifndef OPENSSL_NO_ENGINE 273 e = setup_engine(bio_err, engine, 0); 274 #endif 275 276 if (g && !num) 277 num = DEFBITS; 278 279 #ifndef OPENSSL_NO_DSA 280 if (dsaparam) 281 { 282 if (g) 283 { 284 BIO_printf(bio_err, "generator may not be chosen for DSA parameters\n"); 285 goto end; 286 } 287 } 288 else 289 #endif 290 { 291 /* DH parameters */ 292 if (num && !g) 293 g = 2; 294 } 295 296 if(num) { 297 298 BN_GENCB cb; 299 BN_GENCB_set(&cb, dh_cb, bio_err); 300 if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL) 301 { 302 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n"); 303 } 304 if (inrand != NULL) 305 BIO_printf(bio_err,"%ld semi-random bytes loaded\n", 306 app_RAND_load_files(inrand)); 307 308 #ifndef OPENSSL_NO_DSA 309 if (dsaparam) 310 { 311 DSA *dsa = DSA_new(); 312 313 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num); 314 if(!dsa || !DSA_generate_parameters_ex(dsa, num, 315 NULL, 0, NULL, NULL, &cb)) 316 { 317 if(dsa) DSA_free(dsa); 318 ERR_print_errors(bio_err); 319 goto end; 320 } 321 322 dh = DSA_dup_DH(dsa); 323 DSA_free(dsa); 324 if (dh == NULL) 325 { 326 ERR_print_errors(bio_err); 327 goto end; 328 } 329 } 330 else 331 #endif 332 { 333 dh = DH_new(); 334 BIO_printf(bio_err,"Generating DH parameters, %d bit long safe prime, generator %d\n",num,g); 335 BIO_printf(bio_err,"This is going to take a long time\n"); 336 if(!dh || !DH_generate_parameters_ex(dh, num, g, &cb)) 337 { 338 if(dh) DH_free(dh); 339 ERR_print_errors(bio_err); 340 goto end; 341 } 342 } 343 344 app_RAND_write_file(NULL, bio_err); 345 } else { 346 347 in=BIO_new(BIO_s_file()); 348 if (in == NULL) 349 { 350 ERR_print_errors(bio_err); 351 goto end; 352 } 353 if (infile == NULL) 354 BIO_set_fp(in,stdin,BIO_NOCLOSE); 355 else 356 { 357 if (BIO_read_filename(in,infile) <= 0) 358 { 359 perror(infile); 360 goto end; 361 } 362 } 363 364 if (informat != FORMAT_ASN1 && informat != FORMAT_PEM) 365 { 366 BIO_printf(bio_err,"bad input format specified\n"); 367 goto end; 368 } 369 370 #ifndef OPENSSL_NO_DSA 371 if (dsaparam) 372 { 373 DSA *dsa; 374 375 if (informat == FORMAT_ASN1) 376 dsa=d2i_DSAparams_bio(in,NULL); 377 else /* informat == FORMAT_PEM */ 378 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL); 379 380 if (dsa == NULL) 381 { 382 BIO_printf(bio_err,"unable to load DSA parameters\n"); 383 ERR_print_errors(bio_err); 384 goto end; 385 } 386 387 dh = DSA_dup_DH(dsa); 388 DSA_free(dsa); 389 if (dh == NULL) 390 { 391 ERR_print_errors(bio_err); 392 goto end; 393 } 394 } 395 else 396 #endif 397 { 398 if (informat == FORMAT_ASN1) 399 dh=d2i_DHparams_bio(in,NULL); 400 else /* informat == FORMAT_PEM */ 401 dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL); 402 403 if (dh == NULL) 404 { 405 BIO_printf(bio_err,"unable to load DH parameters\n"); 406 ERR_print_errors(bio_err); 407 goto end; 408 } 409 } 410 411 /* dh != NULL */ 412 } 413 414 out=BIO_new(BIO_s_file()); 415 if (out == NULL) 416 { 417 ERR_print_errors(bio_err); 418 goto end; 419 } 420 if (outfile == NULL) 421 { 422 BIO_set_fp(out,stdout,BIO_NOCLOSE); 423 #ifdef OPENSSL_SYS_VMS 424 { 425 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 426 out = BIO_push(tmpbio, out); 427 } 428 #endif 429 } 430 else 431 { 432 if (BIO_write_filename(out,outfile) <= 0) 433 { 434 perror(outfile); 435 goto end; 436 } 437 } 438 439 440 if (text) 441 { 442 DHparams_print(out,dh); 443 } 444 445 if (check) 446 { 447 if (!DH_check(dh,&i)) 448 { 449 ERR_print_errors(bio_err); 450 goto end; 451 } 452 if (i & DH_CHECK_P_NOT_PRIME) 453 printf("p value is not prime\n"); 454 if (i & DH_CHECK_P_NOT_SAFE_PRIME) 455 printf("p value is not a safe prime\n"); 456 if (i & DH_UNABLE_TO_CHECK_GENERATOR) 457 printf("unable to check the generator value\n"); 458 if (i & DH_NOT_SUITABLE_GENERATOR) 459 printf("the g value is not a generator\n"); 460 if (i == 0) 461 printf("DH parameters appear to be ok.\n"); 462 } 463 if (C) 464 { 465 unsigned char *data; 466 int len,l,bits; 467 468 len=BN_num_bytes(dh->p); 469 bits=BN_num_bits(dh->p); 470 data=(unsigned char *)OPENSSL_malloc(len); 471 if (data == NULL) 472 { 473 perror("OPENSSL_malloc"); 474 goto end; 475 } 476 printf("#ifndef HEADER_DH_H\n" 477 "#include <openssl/dh.h>\n" 478 "#endif\n"); 479 printf("DH *get_dh%d()\n\t{\n",bits); 480 481 l=BN_bn2bin(dh->p,data); 482 printf("\tstatic unsigned char dh%d_p[]={",bits); 483 for (i=0; i<l; i++) 484 { 485 if ((i%12) == 0) printf("\n\t\t"); 486 printf("0x%02X,",data[i]); 487 } 488 printf("\n\t\t};\n"); 489 490 l=BN_bn2bin(dh->g,data); 491 printf("\tstatic unsigned char dh%d_g[]={",bits); 492 for (i=0; i<l; i++) 493 { 494 if ((i%12) == 0) printf("\n\t\t"); 495 printf("0x%02X,",data[i]); 496 } 497 printf("\n\t\t};\n"); 498 499 printf("\tDH *dh;\n\n"); 500 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n"); 501 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n", 502 bits,bits); 503 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n", 504 bits,bits); 505 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n"); 506 printf("\t\t{ DH_free(dh); return(NULL); }\n"); 507 if (dh->length) 508 printf("\tdh->length = %ld;\n", dh->length); 509 printf("\treturn(dh);\n\t}\n"); 510 OPENSSL_free(data); 511 } 512 513 514 if (!noout) 515 { 516 if (outformat == FORMAT_ASN1) 517 i=i2d_DHparams_bio(out,dh); 518 else if (outformat == FORMAT_PEM) 519 i=PEM_write_bio_DHparams(out,dh); 520 else { 521 BIO_printf(bio_err,"bad output format specified for outfile\n"); 522 goto end; 523 } 524 if (!i) 525 { 526 BIO_printf(bio_err,"unable to write DH parameters\n"); 527 ERR_print_errors(bio_err); 528 goto end; 529 } 530 } 531 ret=0; 532 end: 533 if (in != NULL) BIO_free(in); 534 if (out != NULL) BIO_free_all(out); 535 if (dh != NULL) DH_free(dh); 536 apps_shutdown(); 537 OPENSSL_EXIT(ret); 538 } 539 540 /* dh_cb is identical to dsa_cb in apps/dsaparam.c */ 541 static int MS_CALLBACK dh_cb(int p, int n, BN_GENCB *cb) 542 { 543 char c='*'; 544 545 if (p == 0) c='.'; 546 if (p == 1) c='+'; 547 if (p == 2) c='*'; 548 if (p == 3) c='\n'; 549 BIO_write(cb->arg,&c,1); 550 (void)BIO_flush(cb->arg); 551 #ifdef LINT 552 p=n; 553 #endif 554 return 1; 555 } 556 557 #endif 558