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 ENGINE *e = NULL; 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,*engine=NULL; 161 int num = 0, g = 0; 162 163 apps_startup(); 164 165 if (bio_err == NULL) 166 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 167 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 168 169 if (!load_config(bio_err, NULL)) 170 goto end; 171 172 infile=NULL; 173 outfile=NULL; 174 informat=FORMAT_PEM; 175 outformat=FORMAT_PEM; 176 177 prog=argv[0]; 178 argc--; 179 argv++; 180 while (argc >= 1) 181 { 182 if (strcmp(*argv,"-inform") == 0) 183 { 184 if (--argc < 1) goto bad; 185 informat=str2fmt(*(++argv)); 186 } 187 else if (strcmp(*argv,"-outform") == 0) 188 { 189 if (--argc < 1) goto bad; 190 outformat=str2fmt(*(++argv)); 191 } 192 else if (strcmp(*argv,"-in") == 0) 193 { 194 if (--argc < 1) goto bad; 195 infile= *(++argv); 196 } 197 else if (strcmp(*argv,"-out") == 0) 198 { 199 if (--argc < 1) goto bad; 200 outfile= *(++argv); 201 } 202 else if (strcmp(*argv,"-engine") == 0) 203 { 204 if (--argc < 1) goto bad; 205 engine= *(++argv); 206 } 207 else if (strcmp(*argv,"-check") == 0) 208 check=1; 209 else if (strcmp(*argv,"-text") == 0) 210 text=1; 211 #ifndef OPENSSL_NO_DSA 212 else if (strcmp(*argv,"-dsaparam") == 0) 213 dsaparam=1; 214 #endif 215 else if (strcmp(*argv,"-C") == 0) 216 C=1; 217 else if (strcmp(*argv,"-noout") == 0) 218 noout=1; 219 else if (strcmp(*argv,"-2") == 0) 220 g=2; 221 else if (strcmp(*argv,"-5") == 0) 222 g=5; 223 else if (strcmp(*argv,"-rand") == 0) 224 { 225 if (--argc < 1) goto bad; 226 inrand= *(++argv); 227 } 228 else if (((sscanf(*argv,"%d",&num) == 0) || (num <= 0))) 229 goto bad; 230 argv++; 231 argc--; 232 } 233 234 if (badops) 235 { 236 bad: 237 BIO_printf(bio_err,"%s [options] [numbits]\n",prog); 238 BIO_printf(bio_err,"where options are\n"); 239 BIO_printf(bio_err," -inform arg input format - one of DER PEM\n"); 240 BIO_printf(bio_err," -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," -dsaparam read or generate DSA parameters, convert to DH\n"); 245 #endif 246 BIO_printf(bio_err," -check check the DH parameters\n"); 247 BIO_printf(bio_err," -text print a text form of the DH parameters\n"); 248 BIO_printf(bio_err," -C Output C code\n"); 249 BIO_printf(bio_err," -2 generate parameters using 2 as the generator value\n"); 250 BIO_printf(bio_err," -5 generate parameters using 5 as the generator value\n"); 251 BIO_printf(bio_err," numbits number of bits in to generate (default 512)\n"); 252 BIO_printf(bio_err," -engine e use engine e, possibly a hardware device.\n"); 253 BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR); 254 BIO_printf(bio_err," - load the file (or the files in the directory) into\n"); 255 BIO_printf(bio_err," the random number generator\n"); 256 BIO_printf(bio_err," -noout no output\n"); 257 goto end; 258 } 259 260 ERR_load_crypto_strings(); 261 262 e = setup_engine(bio_err, engine, 0); 263 264 if (g && !num) 265 num = DEFBITS; 266 267 #ifndef OPENSSL_NO_DSA 268 if (dsaparam) 269 { 270 if (g) 271 { 272 BIO_printf(bio_err, "generator may not be chosen for DSA parameters\n"); 273 goto end; 274 } 275 } 276 else 277 #endif 278 { 279 /* DH parameters */ 280 if (num && !g) 281 g = 2; 282 } 283 284 if(num) { 285 286 if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL) 287 { 288 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n"); 289 } 290 if (inrand != NULL) 291 BIO_printf(bio_err,"%ld semi-random bytes loaded\n", 292 app_RAND_load_files(inrand)); 293 294 #ifndef OPENSSL_NO_DSA 295 if (dsaparam) 296 { 297 DSA *dsa; 298 299 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num); 300 dsa = DSA_generate_parameters(num, NULL, 0, NULL, NULL, dh_cb, bio_err); 301 if (dsa == NULL) 302 { 303 ERR_print_errors(bio_err); 304 goto end; 305 } 306 307 dh = DSA_dup_DH(dsa); 308 DSA_free(dsa); 309 if (dh == NULL) 310 { 311 ERR_print_errors(bio_err); 312 goto end; 313 } 314 } 315 else 316 #endif 317 { 318 BIO_printf(bio_err,"Generating DH parameters, %d bit long safe prime, generator %d\n",num,g); 319 BIO_printf(bio_err,"This is going to take a long time\n"); 320 dh=DH_generate_parameters(num,g,dh_cb,bio_err); 321 322 if (dh == NULL) 323 { 324 ERR_print_errors(bio_err); 325 goto end; 326 } 327 } 328 329 app_RAND_write_file(NULL, bio_err); 330 } else { 331 332 in=BIO_new(BIO_s_file()); 333 if (in == NULL) 334 { 335 ERR_print_errors(bio_err); 336 goto end; 337 } 338 if (infile == NULL) 339 BIO_set_fp(in,stdin,BIO_NOCLOSE); 340 else 341 { 342 if (BIO_read_filename(in,infile) <= 0) 343 { 344 perror(infile); 345 goto end; 346 } 347 } 348 349 if (informat != FORMAT_ASN1 && informat != FORMAT_PEM) 350 { 351 BIO_printf(bio_err,"bad input format specified\n"); 352 goto end; 353 } 354 355 #ifndef OPENSSL_NO_DSA 356 if (dsaparam) 357 { 358 DSA *dsa; 359 360 if (informat == FORMAT_ASN1) 361 dsa=d2i_DSAparams_bio(in,NULL); 362 else /* informat == FORMAT_PEM */ 363 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL); 364 365 if (dsa == NULL) 366 { 367 BIO_printf(bio_err,"unable to load DSA parameters\n"); 368 ERR_print_errors(bio_err); 369 goto end; 370 } 371 372 dh = DSA_dup_DH(dsa); 373 DSA_free(dsa); 374 if (dh == NULL) 375 { 376 ERR_print_errors(bio_err); 377 goto end; 378 } 379 } 380 else 381 #endif 382 { 383 if (informat == FORMAT_ASN1) 384 dh=d2i_DHparams_bio(in,NULL); 385 else /* informat == FORMAT_PEM */ 386 dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL); 387 388 if (dh == NULL) 389 { 390 BIO_printf(bio_err,"unable to load DH parameters\n"); 391 ERR_print_errors(bio_err); 392 goto end; 393 } 394 } 395 396 /* dh != NULL */ 397 } 398 399 out=BIO_new(BIO_s_file()); 400 if (out == NULL) 401 { 402 ERR_print_errors(bio_err); 403 goto end; 404 } 405 if (outfile == NULL) 406 { 407 BIO_set_fp(out,stdout,BIO_NOCLOSE); 408 #ifdef OPENSSL_SYS_VMS 409 { 410 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 411 out = BIO_push(tmpbio, out); 412 } 413 #endif 414 } 415 else 416 { 417 if (BIO_write_filename(out,outfile) <= 0) 418 { 419 perror(outfile); 420 goto end; 421 } 422 } 423 424 425 if (text) 426 { 427 DHparams_print(out,dh); 428 } 429 430 if (check) 431 { 432 if (!DH_check(dh,&i)) 433 { 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 { 450 unsigned char *data; 451 int len,l,bits; 452 453 len=BN_num_bytes(dh->p); 454 bits=BN_num_bits(dh->p); 455 data=(unsigned char *)OPENSSL_malloc(len); 456 if (data == NULL) 457 { 458 perror("OPENSSL_malloc"); 459 goto end; 460 } 461 printf("#ifndef HEADER_DH_H\n" 462 "#include <openssl/dh.h>\n" 463 "#endif\n"); 464 printf("DH *get_dh%d()\n\t{\n",bits); 465 466 l=BN_bn2bin(dh->p,data); 467 printf("\tstatic unsigned char dh%d_p[]={",bits); 468 for (i=0; i<l; i++) 469 { 470 if ((i%12) == 0) printf("\n\t\t"); 471 printf("0x%02X,",data[i]); 472 } 473 printf("\n\t\t};\n"); 474 475 l=BN_bn2bin(dh->g,data); 476 printf("\tstatic unsigned char dh%d_g[]={",bits); 477 for (i=0; i<l; i++) 478 { 479 if ((i%12) == 0) printf("\n\t\t"); 480 printf("0x%02X,",data[i]); 481 } 482 printf("\n\t\t};\n"); 483 484 printf("\tDH *dh;\n\n"); 485 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n"); 486 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n", 487 bits,bits); 488 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n", 489 bits,bits); 490 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n"); 491 printf("\t\t{ DH_free(dh); return(NULL); }\n"); 492 if (dh->length) 493 printf("\tdh->length = %ld;\n", dh->length); 494 printf("\treturn(dh);\n\t}\n"); 495 OPENSSL_free(data); 496 } 497 498 499 if (!noout) 500 { 501 if (outformat == FORMAT_ASN1) 502 i=i2d_DHparams_bio(out,dh); 503 else if (outformat == FORMAT_PEM) 504 i=PEM_write_bio_DHparams(out,dh); 505 else { 506 BIO_printf(bio_err,"bad output format specified for outfile\n"); 507 goto end; 508 } 509 if (!i) 510 { 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) BIO_free(in); 519 if (out != NULL) BIO_free_all(out); 520 if (dh != NULL) DH_free(dh); 521 apps_shutdown(); 522 OPENSSL_EXIT(ret); 523 } 524 525 /* dh_cb is identical to dsa_cb in apps/dsaparam.c */ 526 static void MS_CALLBACK dh_cb(int p, int n, void *arg) 527 { 528 char c='*'; 529 530 if (p == 0) c='.'; 531 if (p == 1) c='+'; 532 if (p == 2) c='*'; 533 if (p == 3) c='\n'; 534 BIO_write((BIO *)arg,&c,1); 535 (void)BIO_flush((BIO *)arg); 536 #ifdef LINT 537 p=n; 538 #endif 539 } 540 541 #endif 542