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
  61 #ifndef OPENSSL_NO_DSA
  62 #include <assert.h>
  63 #include <stdio.h>
  64 #include <stdlib.h>
  65 #include <time.h>
  66 #include <string.h>
  67 #include "apps.h"
  68 #include <openssl/bio.h>
  69 #include <openssl/err.h>
  70 #include <openssl/bn.h>
  71 #include <openssl/dsa.h>
  72 #include <openssl/x509.h>
  73 #include <openssl/pem.h>
  74
  75 #undef PROG
  76 #define PROG    dsaparam_main
  77
  78 /*-
  79  * -inform arg  - input format - default PEM (DER or PEM)
  80  * -outform arg - output format - default PEM
  81  * -in arg      - input file - default stdin
  82  * -out arg     - output file - default stdout
  83  * -noout
  84  * -text
  85  * -C
  86  * -noout
  87  * -genkey
  88  *  #ifdef GENCB_TEST
  89  * -timebomb n  - interrupt keygen after <n> seconds
  90  *  #endif
  91  */
  92
  93 #ifdef GENCB_TEST
  94
  95 static int stop_keygen_flag = 0;
  96
  97 static void timebomb_sigalarm(int foo)
  98         {
  99         stop_keygen_flag = 1;
 100         }
 101
 102 #endif
 103
 104 static int dsa_cb(int p, int n, BN_GENCB *cb);
 105
 106 int MAIN(int, char **);
 107
 108 int MAIN(int argc, char **argv)
 109         {
 110         DSA *dsa=NULL;
 111         int i,badops=0,text=0;
 112         BIO *in=NULL,*out=NULL;
 113         int informat,outformat,noout=0,C=0,ret=1;
 114         char *infile,*outfile,*prog,*inrand=NULL;
 115         int numbits= -1,num,genkey=0;
 116         int need_rand=0;
 117         int non_fips_allow = 0;
 118         BN_GENCB *cb = NULL;
 119 #ifndef OPENSSL_NO_ENGINE
 120         char *engine=NULL;
 121 #endif
 122 #ifdef GENCB_TEST
 123         int timebomb=0;
 124 #endif
 125
 126         apps_startup();
 127
 128         if (bio_err == NULL)
 129                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 130                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 131
 132         if (!load_config(bio_err, NULL))
 133                 goto end;
 134
 135         infile=NULL;
 136         outfile=NULL;
 137         informat=FORMAT_PEM;
 138         outformat=FORMAT_PEM;
 139
 140         prog=argv[0];
 141         argc--;
 142         argv++;
 143         while (argc >= 1)
 144                 {
 145                 if      (strcmp(*argv,"-inform") == 0)
 146                         {
 147                         if (--argc < 1) goto bad;
 148                         informat=str2fmt(*(++argv));
 149                         }
 150                 else if (strcmp(*argv,"-outform") == 0)
 151                         {
 152                         if (--argc < 1) goto bad;
 153                         outformat=str2fmt(*(++argv));
 154                         }
 155                 else if (strcmp(*argv,"-in") == 0)
 156                         {
 157                         if (--argc < 1) goto bad;
 158                         infile= *(++argv);
 159                         }
 160                 else if (strcmp(*argv,"-out") == 0)
 161                         {
 162                         if (--argc < 1) goto bad;
 163                         outfile= *(++argv);
 164                         }
 165 #ifndef OPENSSL_NO_ENGINE
 166                 else if(strcmp(*argv, "-engine") == 0)
 167                         {
 168                         if (--argc < 1) goto bad;
 169                         engine = *(++argv);
 170                         }
 171 #endif
 172 #ifdef GENCB_TEST
 173                 else if(strcmp(*argv, "-timebomb") == 0)
 174                         {
 175                         if (--argc < 1) 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                         {
 185                         genkey=1;
 186                         need_rand=1;
 187                         }
 188                 else if (strcmp(*argv,"-rand") == 0)
 189                         {
 190                         if (--argc < 1) goto bad;
 191                         inrand= *(++argv);
 192                         need_rand=1;
 193                         }
 194                 else if (strcmp(*argv,"-noout") == 0)
 195                         noout=1;
 196                 else if (strcmp(*argv,"-non-fips-allow") == 0)
 197                         non_fips_allow = 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                 cb = BN_GENCB_new();
 292                 if(!cb)
 293                         {
 294                         BIO_printf(bio_err,"Error allocating BN_GENCB object\n");
 295                         goto end;
 296                         }
 297                 BN_GENCB_set(cb, dsa_cb, bio_err);
 298                 assert(need_rand);
 299                 dsa = DSA_new();
 300                 if(!dsa)
 301                         {
 302                         BIO_printf(bio_err,"Error allocating DSA object\n");
 303                         goto end;
 304                         }
 305                 if (non_fips_allow)
 306                         dsa->flags |= DSA_FLAG_NON_FIPS_ALLOW;
 307                 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
 308                 BIO_printf(bio_err,"This could take some time\n");
 309 #ifdef GENCB_TEST
 310                 if(timebomb > 0)
 311         {
 312                 struct sigaction act;
 313                 act.sa_handler = timebomb_sigalarm;
 314                 act.sa_flags = 0;
 315                 BIO_printf(bio_err,"(though I'll stop it if not done within %d secs)\n",
 316                                 timebomb);
 317                 if(sigaction(SIGALRM, &act, NULL) != 0)
 318                         {
 319                         BIO_printf(bio_err,"Error, couldn't set SIGALRM handler\n");
 320                         goto end;
 321                         }
 322                 alarm(timebomb);
 323         }
 324 #endif
 325                 if(!DSA_generate_parameters_ex(dsa,num,NULL,0,NULL,NULL, cb))
 326                         {
 327 #ifdef GENCB_TEST
 328                         if(stop_keygen_flag)
 329                                 {
 330                                 BIO_printf(bio_err,"DSA key generation time-stopped\n");
 331                                 /* This is an asked-for behaviour! */
 332                                 ret = 0;
 333                                 goto end;
 334                                 }
 335 #endif
 336                         ERR_print_errors(bio_err);
 337                         BIO_printf(bio_err,"Error, DSA key generation failed\n");
 338                         goto end;
 339                         }
 340                 }
 341         else if (informat == FORMAT_ASN1)
 342                 dsa=d2i_DSAparams_bio(in,NULL);
 343         else if (informat == FORMAT_PEM)
 344                 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL);
 345         else
 346                 {
 347                 BIO_printf(bio_err,"bad input format specified\n");
 348                 goto end;
 349                 }
 350         if (dsa == NULL)
 351                 {
 352                 BIO_printf(bio_err,"unable to load DSA parameters\n");
 353                 ERR_print_errors(bio_err);
 354                 goto end;
 355                 }
 356
 357         if (text)
 358                 {
 359                 DSAparams_print(out,dsa);
 360                 }
 361
 362         if (C)
 363                 {
 364                 unsigned char *data;
 365                 int l,len,bits_p;
 366
 367                 len=BN_num_bytes(dsa->p);
 368                 bits_p=BN_num_bits(dsa->p);
 369                 data=(unsigned char *)OPENSSL_malloc(len+20);
 370                 if (data == NULL)
 371                         {
 372                         perror("OPENSSL_malloc");
 373                         goto end;
 374                         }
 375                 l=BN_bn2bin(dsa->p,data);
 376                 printf("static unsigned char dsa%d_p[]={",bits_p);
 377                 for (i=0; i<l; i++)
 378                         {
 379                         if ((i%12) == 0) printf("\n\t");
 380                         printf("0x%02X,",data[i]);
 381                         }
 382                 printf("\n\t};\n");
 383
 384                 l=BN_bn2bin(dsa->q,data);
 385                 printf("static unsigned char dsa%d_q[]={",bits_p);
 386                 for (i=0; i<l; i++)
 387                         {
 388                         if ((i%12) == 0) printf("\n\t");
 389                         printf("0x%02X,",data[i]);
 390                         }
 391                 printf("\n\t};\n");
 392
 393                 l=BN_bn2bin(dsa->g,data);
 394                 printf("static unsigned char dsa%d_g[]={",bits_p);
 395                 for (i=0; i<l; i++)
 396                         {
 397                         if ((i%12) == 0) printf("\n\t");
 398                         printf("0x%02X,",data[i]);
 399                         }
 400                 printf("\n\t};\n\n");
 401
 402                 printf("DSA *get_dsa%d()\n\t{\n",bits_p);
 403                 printf("\tDSA *dsa;\n\n");
 404                 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
 405                 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
 406                         bits_p,bits_p);
 407                 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
 408                         bits_p,bits_p);
 409                 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
 410                         bits_p,bits_p);
 411                 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
 412                 printf("\t\t{ DSA_free(dsa); return(NULL); }\n");
 413                 printf("\treturn(dsa);\n\t}\n");
 414                 }
 415
 416
 417         if (!noout)
 418                 {
 419                 if      (outformat == FORMAT_ASN1)
 420                         i=i2d_DSAparams_bio(out,dsa);
 421                 else if (outformat == FORMAT_PEM)
 422                         i=PEM_write_bio_DSAparams(out,dsa);
 423                 else    {
 424                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 425                         goto end;
 426                         }
 427                 if (!i)
 428                         {
 429                         BIO_printf(bio_err,"unable to write DSA parameters\n");
 430                         ERR_print_errors(bio_err);
 431                         goto end;
 432                         }
 433                 }
 434         if (genkey)
 435                 {
 436                 DSA *dsakey;
 437
 438                 assert(need_rand);
 439                 if ((dsakey=DSAparams_dup(dsa)) == NULL) goto end;
 440                 if (non_fips_allow)
 441                         dsakey->flags |= DSA_FLAG_NON_FIPS_ALLOW;
 442                 if (!DSA_generate_key(dsakey))
 443                         {
 444                         ERR_print_errors(bio_err);
 445                         DSA_free(dsakey);
 446                         goto end;
 447                         }
 448                 if      (outformat == FORMAT_ASN1)
 449                         i=i2d_DSAPrivateKey_bio(out,dsakey);
 450                 else if (outformat == FORMAT_PEM)
 451                         i=PEM_write_bio_DSAPrivateKey(out,dsakey,NULL,NULL,0,NULL,NULL);
 452                 else    {
 453                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 454                         DSA_free(dsakey);
 455                         goto end;
 456                         }
 457                 DSA_free(dsakey);
 458                 }
 459         if (need_rand)
 460                 app_RAND_write_file(NULL, bio_err);
 461         ret=0;
 462 end:
 463         if (cb != NULL) BN_GENCB_free(cb);
 464         if (in != NULL) BIO_free(in);
 465         if (out != NULL) BIO_free_all(out);
 466         if (dsa != NULL) DSA_free(dsa);
 467         apps_shutdown();
 468         OPENSSL_EXIT(ret);
 469         }
 470
 471 static int dsa_cb(int p, int n, BN_GENCB *cb)
 472         {
 473         char c='*';
 474
 475         if (p == 0) c='.';
 476         if (p == 1) c='+';
 477         if (p == 2) c='*';
 478         if (p == 3) c='\n';
 479         BIO_write(BN_GENCB_get_arg(cb),&c,1);
 480         (void)BIO_flush(BN_GENCB_get_arg(cb));
 481 #ifdef GENCB_TEST
 482         if(stop_keygen_flag)
 483                 return 0;
 484 #endif
 485         return 1;
 486         }
 487 #else /* !OPENSSL_NO_DSA */
 488
 489 # if PEDANTIC
 490 static void *dummy=&dummy;
 491 # endif
 492
 493 #endif