1 /* apps/dsaparam.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 #include <openssl/opensslconf.h> /* for OPENSSL_NO_DSA */ 60 /* 61 * Until the key-gen callbacks are modified to use newer prototypes, we allow 62 * deprecated functions for openssl-internal code 63 */ 64 #ifdef OPENSSL_NO_DEPRECATED 65 # undef OPENSSL_NO_DEPRECATED 66 #endif 67 68 #ifndef OPENSSL_NO_DSA 69 # include <assert.h> 70 # include <stdio.h> 71 # include <stdlib.h> 72 # include <time.h> 73 # include <string.h> 74 # include "apps.h" 75 # include <openssl/bio.h> 76 # include <openssl/err.h> 77 # include <openssl/bn.h> 78 # include <openssl/dsa.h> 79 # include <openssl/x509.h> 80 # include <openssl/pem.h> 81 82 # undef PROG 83 # define PROG dsaparam_main 84 85 /*- 86 * -inform arg - input format - default PEM (DER or PEM) 87 * -outform arg - output format - default PEM 88 * -in arg - input file - default stdin 89 * -out arg - output file - default stdout 90 * -noout 91 * -text 92 * -C 93 * -noout 94 * -genkey 95 * #ifdef GENCB_TEST 96 * -timebomb n - interrupt keygen after <n> seconds 97 * #endif 98 */ 99 100 # ifdef GENCB_TEST 101 102 static int stop_keygen_flag = 0; 103 104 static void timebomb_sigalarm(int foo) 105 { 106 stop_keygen_flag = 1; 107 } 108 109 # endif 110 111 static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb); 112 113 int MAIN(int, char **); 114 115 int MAIN(int argc, char **argv) 116 { 117 DSA *dsa = NULL; 118 int i, badops = 0, text = 0; 119 BIO *in = NULL, *out = NULL; 120 int informat, outformat, noout = 0, C = 0, ret = 1; 121 char *infile, *outfile, *prog, *inrand = NULL; 122 int numbits = -1, num, genkey = 0; 123 int need_rand = 0; 124 # ifndef OPENSSL_NO_ENGINE 125 char *engine = NULL; 126 # endif 127 # ifdef GENCB_TEST 128 int timebomb = 0; 129 # endif 130 131 apps_startup(); 132 133 if (bio_err == NULL) 134 if ((bio_err = BIO_new(BIO_s_file())) != NULL) 135 BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT); 136 137 if (!load_config(bio_err, NULL)) 138 goto end; 139 140 infile = NULL; 141 outfile = NULL; 142 informat = FORMAT_PEM; 143 outformat = FORMAT_PEM; 144 145 prog = argv[0]; 146 argc--; 147 argv++; 148 while (argc >= 1) { 149 if (strcmp(*argv, "-inform") == 0) { 150 if (--argc < 1) 151 goto bad; 152 informat = str2fmt(*(++argv)); 153 } else if (strcmp(*argv, "-outform") == 0) { 154 if (--argc < 1) 155 goto bad; 156 outformat = str2fmt(*(++argv)); 157 } else if (strcmp(*argv, "-in") == 0) { 158 if (--argc < 1) 159 goto bad; 160 infile = *(++argv); 161 } else if (strcmp(*argv, "-out") == 0) { 162 if (--argc < 1) 163 goto bad; 164 outfile = *(++argv); 165 } 166 # ifndef OPENSSL_NO_ENGINE 167 else if (strcmp(*argv, "-engine") == 0) { 168 if (--argc < 1) 169 goto bad; 170 engine = *(++argv); 171 } 172 # endif 173 # ifdef GENCB_TEST 174 else if (strcmp(*argv, "-timebomb") == 0) { 175 if (--argc < 1) 176 goto bad; 177 timebomb = atoi(*(++argv)); 178 } 179 # endif 180 else if (strcmp(*argv, "-text") == 0) 181 text = 1; 182 else if (strcmp(*argv, "-C") == 0) 183 C = 1; 184 else if (strcmp(*argv, "-genkey") == 0) { 185 genkey = 1; 186 need_rand = 1; 187 } else if (strcmp(*argv, "-rand") == 0) { 188 if (--argc < 1) 189 goto bad; 190 inrand = *(++argv); 191 need_rand = 1; 192 } else if (strcmp(*argv, "-noout") == 0) 193 noout = 1; 194 else if (sscanf(*argv, "%d", &num) == 1) { 195 /* generate a key */ 196 numbits = num; 197 need_rand = 1; 198 } else { 199 BIO_printf(bio_err, "unknown option %s\n", *argv); 200 badops = 1; 201 break; 202 } 203 argc--; 204 argv++; 205 } 206 207 if (badops) { 208 bad: 209 BIO_printf(bio_err, "%s [options] [bits] <infile >outfile\n", prog); 210 BIO_printf(bio_err, "where options are\n"); 211 BIO_printf(bio_err, " -inform arg input format - DER or PEM\n"); 212 BIO_printf(bio_err, " -outform arg output format - DER or PEM\n"); 213 BIO_printf(bio_err, " -in arg input file\n"); 214 BIO_printf(bio_err, " -out arg output file\n"); 215 BIO_printf(bio_err, " -text print as text\n"); 216 BIO_printf(bio_err, " -C Output C code\n"); 217 BIO_printf(bio_err, " -noout no output\n"); 218 BIO_printf(bio_err, " -genkey generate a DSA key\n"); 219 BIO_printf(bio_err, 220 " -rand files to use for random number input\n"); 221 # ifndef OPENSSL_NO_ENGINE 222 BIO_printf(bio_err, 223 " -engine e use engine e, possibly a hardware device.\n"); 224 # endif 225 # ifdef GENCB_TEST 226 BIO_printf(bio_err, 227 " -timebomb n interrupt keygen after <n> seconds\n"); 228 # endif 229 BIO_printf(bio_err, 230 " number number of bits to use for generating private key\n"); 231 goto end; 232 } 233 234 ERR_load_crypto_strings(); 235 236 in = BIO_new(BIO_s_file()); 237 out = BIO_new(BIO_s_file()); 238 if ((in == NULL) || (out == NULL)) { 239 ERR_print_errors(bio_err); 240 goto end; 241 } 242 243 if (infile == NULL) 244 BIO_set_fp(in, stdin, BIO_NOCLOSE); 245 else { 246 if (BIO_read_filename(in, infile) <= 0) { 247 perror(infile); 248 goto end; 249 } 250 } 251 if (outfile == NULL) { 252 BIO_set_fp(out, stdout, BIO_NOCLOSE); 253 # ifdef OPENSSL_SYS_VMS 254 { 255 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 256 out = BIO_push(tmpbio, out); 257 } 258 # endif 259 } else { 260 if (BIO_write_filename(out, outfile) <= 0) { 261 perror(outfile); 262 goto end; 263 } 264 } 265 266 # ifndef OPENSSL_NO_ENGINE 267 setup_engine(bio_err, engine, 0); 268 # endif 269 270 if (need_rand) { 271 app_RAND_load_file(NULL, bio_err, (inrand != NULL)); 272 if (inrand != NULL) 273 BIO_printf(bio_err, "%ld semi-random bytes loaded\n", 274 app_RAND_load_files(inrand)); 275 } 276 277 if (numbits > 0) { 278 BN_GENCB cb; 279 BN_GENCB_set(&cb, dsa_cb, bio_err); 280 assert(need_rand); 281 dsa = DSA_new(); 282 if (!dsa) { 283 BIO_printf(bio_err, "Error allocating DSA object\n"); 284 goto end; 285 } 286 BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n", 287 num); 288 BIO_printf(bio_err, "This could take some time\n"); 289 # ifdef GENCB_TEST 290 if (timebomb > 0) { 291 struct sigaction act; 292 act.sa_handler = timebomb_sigalarm; 293 act.sa_flags = 0; 294 BIO_printf(bio_err, 295 "(though I'll stop it if not done within %d secs)\n", 296 timebomb); 297 if (sigaction(SIGALRM, &act, NULL) != 0) { 298 BIO_printf(bio_err, "Error, couldn't set SIGALRM handler\n"); 299 goto end; 300 } 301 alarm(timebomb); 302 } 303 # endif 304 if (!DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL, &cb)) { 305 # ifdef GENCB_TEST 306 if (stop_keygen_flag) { 307 BIO_printf(bio_err, "DSA key generation time-stopped\n"); 308 /* This is an asked-for behaviour! */ 309 ret = 0; 310 goto end; 311 } 312 # endif 313 ERR_print_errors(bio_err); 314 BIO_printf(bio_err, "Error, DSA key generation failed\n"); 315 goto end; 316 } 317 } else if (informat == FORMAT_ASN1) 318 dsa = d2i_DSAparams_bio(in, NULL); 319 else if (informat == FORMAT_PEM) 320 dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL); 321 else { 322 BIO_printf(bio_err, "bad input format specified\n"); 323 goto end; 324 } 325 if (dsa == NULL) { 326 BIO_printf(bio_err, "unable to load DSA parameters\n"); 327 ERR_print_errors(bio_err); 328 goto end; 329 } 330 331 if (text) { 332 DSAparams_print(out, dsa); 333 } 334 335 if (C) { 336 unsigned char *data; 337 int l, len, bits_p; 338 339 len = BN_num_bytes(dsa->p); 340 bits_p = BN_num_bits(dsa->p); 341 data = (unsigned char *)OPENSSL_malloc(len + 20); 342 if (data == NULL) { 343 perror("OPENSSL_malloc"); 344 goto end; 345 } 346 l = BN_bn2bin(dsa->p, data); 347 printf("static unsigned char dsa%d_p[]={", bits_p); 348 for (i = 0; i < l; i++) { 349 if ((i % 12) == 0) 350 printf("\n\t"); 351 printf("0x%02X,", data[i]); 352 } 353 printf("\n\t};\n"); 354 355 l = BN_bn2bin(dsa->q, data); 356 printf("static unsigned char dsa%d_q[]={", bits_p); 357 for (i = 0; i < l; i++) { 358 if ((i % 12) == 0) 359 printf("\n\t"); 360 printf("0x%02X,", data[i]); 361 } 362 printf("\n\t};\n"); 363 364 l = BN_bn2bin(dsa->g, data); 365 printf("static unsigned char dsa%d_g[]={", bits_p); 366 for (i = 0; i < l; i++) { 367 if ((i % 12) == 0) 368 printf("\n\t"); 369 printf("0x%02X,", data[i]); 370 } 371 printf("\n\t};\n\n"); 372 373 printf("DSA *get_dsa%d()\n\t{\n", bits_p); 374 printf("\tDSA *dsa;\n\n"); 375 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n"); 376 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n", 377 bits_p, bits_p); 378 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n", 379 bits_p, bits_p); 380 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n", 381 bits_p, bits_p); 382 printf 383 ("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n"); 384 printf("\t\t{ DSA_free(dsa); return(NULL); }\n"); 385 printf("\treturn(dsa);\n\t}\n"); 386 } 387 388 if (!noout) { 389 if (outformat == FORMAT_ASN1) 390 i = i2d_DSAparams_bio(out, dsa); 391 else if (outformat == FORMAT_PEM) 392 i = PEM_write_bio_DSAparams(out, dsa); 393 else { 394 BIO_printf(bio_err, "bad output format specified for outfile\n"); 395 goto end; 396 } 397 if (!i) { 398 BIO_printf(bio_err, "unable to write DSA parameters\n"); 399 ERR_print_errors(bio_err); 400 goto end; 401 } 402 } 403 if (genkey) { 404 DSA *dsakey; 405 406 assert(need_rand); 407 if ((dsakey = DSAparams_dup(dsa)) == NULL) 408 goto end; 409 if (!DSA_generate_key(dsakey)) { 410 ERR_print_errors(bio_err); 411 DSA_free(dsakey); 412 goto end; 413 } 414 if (outformat == FORMAT_ASN1) 415 i = i2d_DSAPrivateKey_bio(out, dsakey); 416 else if (outformat == FORMAT_PEM) 417 i = PEM_write_bio_DSAPrivateKey(out, dsakey, NULL, NULL, 0, NULL, 418 NULL); 419 else { 420 BIO_printf(bio_err, "bad output format specified for outfile\n"); 421 DSA_free(dsakey); 422 goto end; 423 } 424 DSA_free(dsakey); 425 } 426 if (need_rand) 427 app_RAND_write_file(NULL, bio_err); 428 ret = 0; 429 end: 430 if (in != NULL) 431 BIO_free(in); 432 if (out != NULL) 433 BIO_free_all(out); 434 if (dsa != NULL) 435 DSA_free(dsa); 436 apps_shutdown(); 437 OPENSSL_EXIT(ret); 438 } 439 440 static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb) 441 { 442 char c = '*'; 443 444 if (p == 0) 445 c = '.'; 446 if (p == 1) 447 c = '+'; 448 if (p == 2) 449 c = '*'; 450 if (p == 3) 451 c = '\n'; 452 BIO_write(cb->arg, &c, 1); 453 (void)BIO_flush(cb->arg); 454 # ifdef LINT 455 p = n; 456 # endif 457 # ifdef GENCB_TEST 458 if (stop_keygen_flag) 459 return 0; 460 # endif 461 return 1; 462 } 463 #else /* !OPENSSL_NO_DSA */ 464 465 # if PEDANTIC 466 static void *dummy = &dummy; 467 # endif 468 469 #endif 470