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