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