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 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 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 DH *dh=NULL; 152 int i,badops=0,text=0; 153 #ifndef NO_DSA 154 int dsaparam=0; 155 #endif 156 BIO *in=NULL,*out=NULL; 157 int informat,outformat,check=0,noout=0,C=0,ret=1; 158 char *infile,*outfile,*prog; 159 char *inrand=NULL; 160 int num = 0, g = 0; 161 162 apps_startup(); 163 164 if (bio_err == NULL) 165 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 166 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 167 168 infile=NULL; 169 outfile=NULL; 170 informat=FORMAT_PEM; 171 outformat=FORMAT_PEM; 172 173 prog=argv[0]; 174 argc--; 175 argv++; 176 while (argc >= 1) 177 { 178 if (strcmp(*argv,"-inform") == 0) 179 { 180 if (--argc < 1) goto bad; 181 informat=str2fmt(*(++argv)); 182 } 183 else if (strcmp(*argv,"-outform") == 0) 184 { 185 if (--argc < 1) goto bad; 186 outformat=str2fmt(*(++argv)); 187 } 188 else if (strcmp(*argv,"-in") == 0) 189 { 190 if (--argc < 1) goto bad; 191 infile= *(++argv); 192 } 193 else if (strcmp(*argv,"-out") == 0) 194 { 195 if (--argc < 1) goto bad; 196 outfile= *(++argv); 197 } 198 else if (strcmp(*argv,"-check") == 0) 199 check=1; 200 else if (strcmp(*argv,"-text") == 0) 201 text=1; 202 #ifndef NO_DSA 203 else if (strcmp(*argv,"-dsaparam") == 0) 204 dsaparam=1; 205 #endif 206 else if (strcmp(*argv,"-C") == 0) 207 C=1; 208 else if (strcmp(*argv,"-noout") == 0) 209 noout=1; 210 else if (strcmp(*argv,"-2") == 0) 211 g=2; 212 else if (strcmp(*argv,"-5") == 0) 213 g=5; 214 else if (strcmp(*argv,"-rand") == 0) 215 { 216 if (--argc < 1) goto bad; 217 inrand= *(++argv); 218 } 219 else if (((sscanf(*argv,"%d",&num) == 0) || (num <= 0))) 220 goto bad; 221 argv++; 222 argc--; 223 } 224 225 if (badops) 226 { 227 bad: 228 BIO_printf(bio_err,"%s [options] [numbits]\n",prog); 229 BIO_printf(bio_err,"where options are\n"); 230 BIO_printf(bio_err," -inform arg input format - one of DER PEM\n"); 231 BIO_printf(bio_err," -outform arg output format - one of DER PEM\n"); 232 BIO_printf(bio_err," -in arg input file\n"); 233 BIO_printf(bio_err," -out arg output file\n"); 234 #ifndef NO_DSA 235 BIO_printf(bio_err," -dsaparam read or generate DSA parameters, convert to DH\n"); 236 #endif 237 BIO_printf(bio_err," -check check the DH parameters\n"); 238 BIO_printf(bio_err," -text print a text form of the DH parameters\n"); 239 BIO_printf(bio_err," -C Output C code\n"); 240 BIO_printf(bio_err," -2 generate parameters using 2 as the generator value\n"); 241 BIO_printf(bio_err," -5 generate parameters using 5 as the generator value\n"); 242 BIO_printf(bio_err," numbits number of bits in to generate (default 512)\n"); 243 BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR); 244 BIO_printf(bio_err," - load the file (or the files in the directory) into\n"); 245 BIO_printf(bio_err," the random number generator\n"); 246 BIO_printf(bio_err," -noout no output\n"); 247 goto end; 248 } 249 250 ERR_load_crypto_strings(); 251 252 if (g && !num) 253 num = DEFBITS; 254 255 #ifndef NO_DSA 256 if (dsaparam) 257 { 258 if (g) 259 { 260 BIO_printf(bio_err, "generator may not be chosen for DSA parameters\n"); 261 goto end; 262 } 263 } 264 else 265 #endif 266 { 267 /* DH parameters */ 268 if (num && !g) 269 g = 2; 270 } 271 272 if(num) { 273 274 if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL) 275 { 276 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n"); 277 } 278 if (inrand != NULL) 279 BIO_printf(bio_err,"%ld semi-random bytes loaded\n", 280 app_RAND_load_files(inrand)); 281 282 #ifndef NO_DSA 283 if (dsaparam) 284 { 285 DSA *dsa; 286 287 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num); 288 dsa = DSA_generate_parameters(num, NULL, 0, NULL, NULL, dh_cb, bio_err); 289 if (dsa == NULL) 290 { 291 ERR_print_errors(bio_err); 292 goto end; 293 } 294 295 dh = DSA_dup_DH(dsa); 296 DSA_free(dsa); 297 if (dh == NULL) 298 { 299 ERR_print_errors(bio_err); 300 goto end; 301 } 302 } 303 else 304 #endif 305 { 306 BIO_printf(bio_err,"Generating DH parameters, %d bit long safe prime, generator %d\n",num,g); 307 BIO_printf(bio_err,"This is going to take a long time\n"); 308 dh=DH_generate_parameters(num,g,dh_cb,bio_err); 309 310 if (dh == NULL) 311 { 312 ERR_print_errors(bio_err); 313 goto end; 314 } 315 } 316 317 app_RAND_write_file(NULL, bio_err); 318 } else { 319 320 in=BIO_new(BIO_s_file()); 321 if (in == NULL) 322 { 323 ERR_print_errors(bio_err); 324 goto end; 325 } 326 if (infile == NULL) 327 BIO_set_fp(in,stdin,BIO_NOCLOSE); 328 else 329 { 330 if (BIO_read_filename(in,infile) <= 0) 331 { 332 perror(infile); 333 goto end; 334 } 335 } 336 337 if (informat != FORMAT_ASN1 && informat != FORMAT_PEM) 338 { 339 BIO_printf(bio_err,"bad input format specified\n"); 340 goto end; 341 } 342 343 #ifndef NO_DSA 344 if (dsaparam) 345 { 346 DSA *dsa; 347 348 if (informat == FORMAT_ASN1) 349 dsa=d2i_DSAparams_bio(in,NULL); 350 else /* informat == FORMAT_PEM */ 351 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL); 352 353 if (dsa == NULL) 354 { 355 BIO_printf(bio_err,"unable to load DSA parameters\n"); 356 ERR_print_errors(bio_err); 357 goto end; 358 } 359 360 dh = DSA_dup_DH(dsa); 361 DSA_free(dsa); 362 if (dh == NULL) 363 { 364 ERR_print_errors(bio_err); 365 goto end; 366 } 367 } 368 else 369 #endif 370 { 371 if (informat == FORMAT_ASN1) 372 dh=d2i_DHparams_bio(in,NULL); 373 else /* informat == FORMAT_PEM */ 374 dh=PEM_read_bio_DHparams(in,NULL,NULL,NULL); 375 376 if (dh == NULL) 377 { 378 BIO_printf(bio_err,"unable to load DH parameters\n"); 379 ERR_print_errors(bio_err); 380 goto end; 381 } 382 } 383 384 /* dh != NULL */ 385 } 386 387 out=BIO_new(BIO_s_file()); 388 if (out == NULL) 389 { 390 ERR_print_errors(bio_err); 391 goto end; 392 } 393 if (outfile == NULL) 394 { 395 BIO_set_fp(out,stdout,BIO_NOCLOSE); 396 #ifdef VMS 397 { 398 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 399 out = BIO_push(tmpbio, out); 400 } 401 #endif 402 } 403 else 404 { 405 if (BIO_write_filename(out,outfile) <= 0) 406 { 407 perror(outfile); 408 goto end; 409 } 410 } 411 412 413 if (text) 414 { 415 DHparams_print(out,dh); 416 } 417 418 if (check) 419 { 420 if (!DH_check(dh,&i)) 421 { 422 ERR_print_errors(bio_err); 423 goto end; 424 } 425 if (i & DH_CHECK_P_NOT_PRIME) 426 printf("p value is not prime\n"); 427 if (i & DH_CHECK_P_NOT_SAFE_PRIME) 428 printf("p value is not a safe prime\n"); 429 if (i & DH_UNABLE_TO_CHECK_GENERATOR) 430 printf("unable to check the generator value\n"); 431 if (i & DH_NOT_SUITABLE_GENERATOR) 432 printf("the g value is not a generator\n"); 433 if (i == 0) 434 printf("DH parameters appear to be ok.\n"); 435 } 436 if (C) 437 { 438 unsigned char *data; 439 int len,l,bits; 440 441 len=BN_num_bytes(dh->p); 442 bits=BN_num_bits(dh->p); 443 data=(unsigned char *)OPENSSL_malloc(len); 444 if (data == NULL) 445 { 446 perror("OPENSSL_malloc"); 447 goto end; 448 } 449 printf("#ifndef HEADER_DH_H\n" 450 "#include <openssl/dh.h>\n" 451 "#endif\n"); 452 printf("DH *get_dh%d()\n\t{\n",bits); 453 454 l=BN_bn2bin(dh->p,data); 455 printf("\tstatic unsigned char dh%d_p[]={",bits); 456 for (i=0; i<l; i++) 457 { 458 if ((i%12) == 0) printf("\n\t\t"); 459 printf("0x%02X,",data[i]); 460 } 461 printf("\n\t\t};\n"); 462 463 l=BN_bn2bin(dh->g,data); 464 printf("\tstatic unsigned char dh%d_g[]={",bits); 465 for (i=0; i<l; i++) 466 { 467 if ((i%12) == 0) printf("\n\t\t"); 468 printf("0x%02X,",data[i]); 469 } 470 printf("\n\t\t};\n"); 471 472 printf("\tDH *dh;\n\n"); 473 printf("\tif ((dh=DH_new()) == NULL) return(NULL);\n"); 474 printf("\tdh->p=BN_bin2bn(dh%d_p,sizeof(dh%d_p),NULL);\n", 475 bits,bits); 476 printf("\tdh->g=BN_bin2bn(dh%d_g,sizeof(dh%d_g),NULL);\n", 477 bits,bits); 478 printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n"); 479 printf("\t\t{ DH_free(dh); return(NULL); }\n"); 480 if (dh->length) 481 printf("\tdh->length = %d;\n", dh->length); 482 printf("\treturn(dh);\n\t}\n"); 483 OPENSSL_free(data); 484 } 485 486 487 if (!noout) 488 { 489 if (outformat == FORMAT_ASN1) 490 i=i2d_DHparams_bio(out,dh); 491 else if (outformat == FORMAT_PEM) 492 i=PEM_write_bio_DHparams(out,dh); 493 else { 494 BIO_printf(bio_err,"bad output format specified for outfile\n"); 495 goto end; 496 } 497 if (!i) 498 { 499 BIO_printf(bio_err,"unable to write DH parameters\n"); 500 ERR_print_errors(bio_err); 501 goto end; 502 } 503 } 504 ret=0; 505 end: 506 if (in != NULL) BIO_free(in); 507 if (out != NULL) BIO_free_all(out); 508 if (dh != NULL) DH_free(dh); 509 EXIT(ret); 510 } 511 512 /* dh_cb is identical to dsa_cb in apps/dsaparam.c */ 513 static void MS_CALLBACK dh_cb(int p, int n, void *arg) 514 { 515 char c='*'; 516 517 if (p == 0) c='.'; 518 if (p == 1) c='+'; 519 if (p == 2) c='*'; 520 if (p == 3) c='\n'; 521 BIO_write((BIO *)arg,&c,1); 522 (void)BIO_flush((BIO *)arg); 523 #ifdef LINT 524 p=n; 525 #endif 526 } 527 528 #endif 529