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 /* Until the key-gen callbacks are modified to use newer prototypes, we allow 61 * deprecated functions for openssl-internal code */ 62 #ifdef OPENSSL_NO_DEPRECATED 63 #undef OPENSSL_NO_DEPRECATED 64 #endif 65 66 #ifndef OPENSSL_NO_DSA 67 #include <assert.h> 68 #include <stdio.h> 69 #include <stdlib.h> 70 #include <time.h> 71 #include <string.h> 72 #include "apps.h" 73 #include <openssl/bio.h> 74 #include <openssl/err.h> 75 #include <openssl/bn.h> 76 #include <openssl/dsa.h> 77 #include <openssl/x509.h> 78 #include <openssl/pem.h> 79 80 #undef PROG 81 #define PROG dsaparam_main 82 83 /* -inform arg - input format - default PEM (DER or PEM) 84 * -outform arg - output format - default PEM 85 * -in arg - input file - default stdin 86 * -out arg - output file - default stdout 87 * -noout 88 * -text 89 * -C 90 * -noout 91 * -genkey 92 * #ifdef GENCB_TEST 93 * -timebomb n - interrupt keygen after <n> seconds 94 * #endif 95 */ 96 97 #ifdef GENCB_TEST 98 99 static int stop_keygen_flag = 0; 100 101 static void timebomb_sigalarm(int foo) 102 { 103 stop_keygen_flag = 1; 104 } 105 106 #endif 107 108 static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb); 109 110 int MAIN(int, char **); 111 112 int MAIN(int argc, char **argv) 113 { 114 DSA *dsa=NULL; 115 int i,badops=0,text=0; 116 BIO *in=NULL,*out=NULL; 117 int informat,outformat,noout=0,C=0,ret=1; 118 char *infile,*outfile,*prog,*inrand=NULL; 119 int numbits= -1,num,genkey=0; 120 int need_rand=0; 121 #ifndef OPENSSL_NO_ENGINE 122 char *engine=NULL; 123 #endif 124 #ifdef GENCB_TEST 125 int timebomb=0; 126 #endif 127 128 apps_startup(); 129 130 if (bio_err == NULL) 131 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 132 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 133 134 if (!load_config(bio_err, NULL)) 135 goto end; 136 137 infile=NULL; 138 outfile=NULL; 139 informat=FORMAT_PEM; 140 outformat=FORMAT_PEM; 141 142 prog=argv[0]; 143 argc--; 144 argv++; 145 while (argc >= 1) 146 { 147 if (strcmp(*argv,"-inform") == 0) 148 { 149 if (--argc < 1) goto bad; 150 informat=str2fmt(*(++argv)); 151 } 152 else if (strcmp(*argv,"-outform") == 0) 153 { 154 if (--argc < 1) goto bad; 155 outformat=str2fmt(*(++argv)); 156 } 157 else if (strcmp(*argv,"-in") == 0) 158 { 159 if (--argc < 1) goto bad; 160 infile= *(++argv); 161 } 162 else if (strcmp(*argv,"-out") == 0) 163 { 164 if (--argc < 1) goto bad; 165 outfile= *(++argv); 166 } 167 #ifndef OPENSSL_NO_ENGINE 168 else if(strcmp(*argv, "-engine") == 0) 169 { 170 if (--argc < 1) goto bad; 171 engine = *(++argv); 172 } 173 #endif 174 #ifdef GENCB_TEST 175 else if(strcmp(*argv, "-timebomb") == 0) 176 { 177 if (--argc < 1) goto bad; 178 timebomb = atoi(*(++argv)); 179 } 180 #endif 181 else if (strcmp(*argv,"-text") == 0) 182 text=1; 183 else if (strcmp(*argv,"-C") == 0) 184 C=1; 185 else if (strcmp(*argv,"-genkey") == 0) 186 { 187 genkey=1; 188 need_rand=1; 189 } 190 else if (strcmp(*argv,"-rand") == 0) 191 { 192 if (--argc < 1) goto bad; 193 inrand= *(++argv); 194 need_rand=1; 195 } 196 else if (strcmp(*argv,"-noout") == 0) 197 noout=1; 198 else if (sscanf(*argv,"%d",&num) == 1) 199 { 200 /* generate a key */ 201 numbits=num; 202 need_rand=1; 203 } 204 else 205 { 206 BIO_printf(bio_err,"unknown option %s\n",*argv); 207 badops=1; 208 break; 209 } 210 argc--; 211 argv++; 212 } 213 214 if (badops) 215 { 216 bad: 217 BIO_printf(bio_err,"%s [options] [bits] <infile >outfile\n",prog); 218 BIO_printf(bio_err,"where options are\n"); 219 BIO_printf(bio_err," -inform arg input format - DER or PEM\n"); 220 BIO_printf(bio_err," -outform arg output format - DER or PEM\n"); 221 BIO_printf(bio_err," -in arg input file\n"); 222 BIO_printf(bio_err," -out arg output file\n"); 223 BIO_printf(bio_err," -text print as text\n"); 224 BIO_printf(bio_err," -C Output C code\n"); 225 BIO_printf(bio_err," -noout no output\n"); 226 BIO_printf(bio_err," -genkey generate a DSA key\n"); 227 BIO_printf(bio_err," -rand files to use for random number input\n"); 228 #ifndef OPENSSL_NO_ENGINE 229 BIO_printf(bio_err," -engine e use engine e, possibly a hardware device.\n"); 230 #endif 231 #ifdef GENCB_TEST 232 BIO_printf(bio_err," -timebomb n interrupt keygen after <n> seconds\n"); 233 #endif 234 BIO_printf(bio_err," number number of bits to use for generating private key\n"); 235 goto end; 236 } 237 238 ERR_load_crypto_strings(); 239 240 in=BIO_new(BIO_s_file()); 241 out=BIO_new(BIO_s_file()); 242 if ((in == NULL) || (out == NULL)) 243 { 244 ERR_print_errors(bio_err); 245 goto end; 246 } 247 248 if (infile == NULL) 249 BIO_set_fp(in,stdin,BIO_NOCLOSE); 250 else 251 { 252 if (BIO_read_filename(in,infile) <= 0) 253 { 254 perror(infile); 255 goto end; 256 } 257 } 258 if (outfile == NULL) 259 { 260 BIO_set_fp(out,stdout,BIO_NOCLOSE); 261 #ifdef OPENSSL_SYS_VMS 262 { 263 BIO *tmpbio = BIO_new(BIO_f_linebuffer()); 264 out = BIO_push(tmpbio, out); 265 } 266 #endif 267 } 268 else 269 { 270 if (BIO_write_filename(out,outfile) <= 0) 271 { 272 perror(outfile); 273 goto end; 274 } 275 } 276 277 #ifndef OPENSSL_NO_ENGINE 278 setup_engine(bio_err, engine, 0); 279 #endif 280 281 if (need_rand) 282 { 283 app_RAND_load_file(NULL, bio_err, (inrand != NULL)); 284 if (inrand != NULL) 285 BIO_printf(bio_err,"%ld semi-random bytes loaded\n", 286 app_RAND_load_files(inrand)); 287 } 288 289 if (numbits > 0) 290 { 291 BN_GENCB cb; 292 BN_GENCB_set(&cb, dsa_cb, bio_err); 293 assert(need_rand); 294 dsa = DSA_new(); 295 if(!dsa) 296 { 297 BIO_printf(bio_err,"Error allocating DSA object\n"); 298 goto end; 299 } 300 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num); 301 BIO_printf(bio_err,"This could take some time\n"); 302 #ifdef GENCB_TEST 303 if(timebomb > 0) 304 { 305 struct sigaction act; 306 act.sa_handler = timebomb_sigalarm; 307 act.sa_flags = 0; 308 BIO_printf(bio_err,"(though I'll stop it if not done within %d secs)\n", 309 timebomb); 310 if(sigaction(SIGALRM, &act, NULL) != 0) 311 { 312 BIO_printf(bio_err,"Error, couldn't set SIGALRM handler\n"); 313 goto end; 314 } 315 alarm(timebomb); 316 } 317 #endif 318 if(!DSA_generate_parameters_ex(dsa,num,NULL,0,NULL,NULL, &cb)) 319 { 320 #ifdef GENCB_TEST 321 if(stop_keygen_flag) 322 { 323 BIO_printf(bio_err,"DSA key generation time-stopped\n"); 324 /* This is an asked-for behaviour! */ 325 ret = 0; 326 goto end; 327 } 328 #endif 329 ERR_print_errors(bio_err); 330 BIO_printf(bio_err,"Error, DSA key generation failed\n"); 331 goto end; 332 } 333 } 334 else if (informat == FORMAT_ASN1) 335 dsa=d2i_DSAparams_bio(in,NULL); 336 else if (informat == FORMAT_PEM) 337 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL); 338 else 339 { 340 BIO_printf(bio_err,"bad input format specified\n"); 341 goto end; 342 } 343 if (dsa == NULL) 344 { 345 BIO_printf(bio_err,"unable to load DSA parameters\n"); 346 ERR_print_errors(bio_err); 347 goto end; 348 } 349 350 if (text) 351 { 352 DSAparams_print(out,dsa); 353 } 354 355 if (C) 356 { 357 unsigned char *data; 358 int l,len,bits_p; 359 360 len=BN_num_bytes(dsa->p); 361 bits_p=BN_num_bits(dsa->p); 362 data=(unsigned char *)OPENSSL_malloc(len+20); 363 if (data == NULL) 364 { 365 perror("OPENSSL_malloc"); 366 goto end; 367 } 368 l=BN_bn2bin(dsa->p,data); 369 printf("static unsigned char dsa%d_p[]={",bits_p); 370 for (i=0; i<l; i++) 371 { 372 if ((i%12) == 0) printf("\n\t"); 373 printf("0x%02X,",data[i]); 374 } 375 printf("\n\t};\n"); 376 377 l=BN_bn2bin(dsa->q,data); 378 printf("static unsigned char dsa%d_q[]={",bits_p); 379 for (i=0; i<l; i++) 380 { 381 if ((i%12) == 0) printf("\n\t"); 382 printf("0x%02X,",data[i]); 383 } 384 printf("\n\t};\n"); 385 386 l=BN_bn2bin(dsa->g,data); 387 printf("static unsigned char dsa%d_g[]={",bits_p); 388 for (i=0; i<l; i++) 389 { 390 if ((i%12) == 0) printf("\n\t"); 391 printf("0x%02X,",data[i]); 392 } 393 printf("\n\t};\n\n"); 394 395 printf("DSA *get_dsa%d()\n\t{\n",bits_p); 396 printf("\tDSA *dsa;\n\n"); 397 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n"); 398 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n", 399 bits_p,bits_p); 400 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n", 401 bits_p,bits_p); 402 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n", 403 bits_p,bits_p); 404 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n"); 405 printf("\t\t{ DSA_free(dsa); return(NULL); }\n"); 406 printf("\treturn(dsa);\n\t}\n"); 407 } 408 409 410 if (!noout) 411 { 412 if (outformat == FORMAT_ASN1) 413 i=i2d_DSAparams_bio(out,dsa); 414 else if (outformat == FORMAT_PEM) 415 i=PEM_write_bio_DSAparams(out,dsa); 416 else { 417 BIO_printf(bio_err,"bad output format specified for outfile\n"); 418 goto end; 419 } 420 if (!i) 421 { 422 BIO_printf(bio_err,"unable to write DSA parameters\n"); 423 ERR_print_errors(bio_err); 424 goto end; 425 } 426 } 427 if (genkey) 428 { 429 DSA *dsakey; 430 431 assert(need_rand); 432 if ((dsakey=DSAparams_dup(dsa)) == NULL) goto end; 433 if (!DSA_generate_key(dsakey)) 434 { 435 ERR_print_errors(bio_err); 436 DSA_free(dsakey); 437 goto end; 438 } 439 if (outformat == FORMAT_ASN1) 440 i=i2d_DSAPrivateKey_bio(out,dsakey); 441 else if (outformat == FORMAT_PEM) 442 i=PEM_write_bio_DSAPrivateKey(out,dsakey,NULL,NULL,0,NULL,NULL); 443 else { 444 BIO_printf(bio_err,"bad output format specified for outfile\n"); 445 DSA_free(dsakey); 446 goto end; 447 } 448 DSA_free(dsakey); 449 } 450 if (need_rand) 451 app_RAND_write_file(NULL, bio_err); 452 ret=0; 453 end: 454 if (in != NULL) BIO_free(in); 455 if (out != NULL) BIO_free_all(out); 456 if (dsa != NULL) DSA_free(dsa); 457 apps_shutdown(); 458 OPENSSL_EXIT(ret); 459 } 460 461 static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb) 462 { 463 char c='*'; 464 465 if (p == 0) c='.'; 466 if (p == 1) c='+'; 467 if (p == 2) c='*'; 468 if (p == 3) c='\n'; 469 BIO_write(cb->arg,&c,1); 470 (void)BIO_flush(cb->arg); 471 #ifdef LINT 472 p=n; 473 #endif 474 #ifdef GENCB_TEST 475 if(stop_keygen_flag) 476 return 0; 477 #endif 478 return 1; 479 } 480 #else /* !OPENSSL_NO_DSA */ 481 482 # if PEDANTIC 483 static void *dummy=&dummy; 484 # endif 485 486 #endif 487