apps/dsaparam.c

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