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