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 /* -inform arg  - input format - default PEM (DER or PEM)
  79  * -outform arg - output format - default PEM
  80  * -in arg      - input file - default stdin
  81  * -out arg     - output file - default stdout
  82  * -noout
  83  * -text
  84  * -C
  85  * -noout
  86  * -genkey
  87  *  #ifdef GENCB_TEST
  88  * -timebomb n  - interrupt keygen after <n> seconds
  89  *  #endif
  90  */
  91
  92 #ifdef GENCB_TEST
  93
  94 static int stop_keygen_flag = 0;
  95
  96 static void timebomb_sigalarm(int foo)
  97         {
  98         stop_keygen_flag = 1;
  99         }
 100
 101 #endif
 102
 103 static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb);
 104
 105 int MAIN(int, char **);
 106
 107 int MAIN(int argc, char **argv)
 108         {
 109         DSA *dsa=NULL;
 110         int i,badops=0,text=0;
 111         BIO *in=NULL,*out=NULL;
 112         int informat,outformat,noout=0,C=0,ret=1;
 113         char *infile,*outfile,*prog,*inrand=NULL;
 114         int numbits= -1,num,genkey=0;
 115         int need_rand=0;
 116         int non_fips_allow = 0;
 117         BN_GENCB *cb = NULL;
 118 #ifndef OPENSSL_NO_ENGINE
 119         char *engine=NULL;
 120 #endif
 121 #ifdef GENCB_TEST
 122         int timebomb=0;
 123 #endif
 124
 125         apps_startup();
 126
 127         if (bio_err == NULL)
 128                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 129                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 130
 131         if (!load_config(bio_err, NULL))
 132                 goto end;
 133
 134         infile=NULL;
 135         outfile=NULL;
 136         informat=FORMAT_PEM;
 137         outformat=FORMAT_PEM;
 138
 139         prog=argv[0];
 140         argc--;
 141         argv++;
 142         while (argc >= 1)
 143                 {
 144                 if      (strcmp(*argv,"-inform") == 0)
 145                         {
 146                         if (--argc < 1) goto bad;
 147                         informat=str2fmt(*(++argv));
 148                         }
 149                 else if (strcmp(*argv,"-outform") == 0)
 150                         {
 151                         if (--argc < 1) goto bad;
 152                         outformat=str2fmt(*(++argv));
 153                         }
 154                 else if (strcmp(*argv,"-in") == 0)
 155                         {
 156                         if (--argc < 1) goto bad;
 157                         infile= *(++argv);
 158                         }
 159                 else if (strcmp(*argv,"-out") == 0)
 160                         {
 161                         if (--argc < 1) goto bad;
 162                         outfile= *(++argv);
 163                         }
 164 #ifndef OPENSSL_NO_ENGINE
 165                 else if(strcmp(*argv, "-engine") == 0)
 166                         {
 167                         if (--argc < 1) goto bad;
 168                         engine = *(++argv);
 169                         }
 170 #endif
 171 #ifdef GENCB_TEST
 172                 else if(strcmp(*argv, "-timebomb") == 0)
 173                         {
 174                         if (--argc < 1) goto bad;
 175                         timebomb = atoi(*(++argv));
 176                         }
 177 #endif
 178                 else if (strcmp(*argv,"-text") == 0)
 179                         text=1;
 180                 else if (strcmp(*argv,"-C") == 0)
 181                         C=1;
 182                 else if (strcmp(*argv,"-genkey") == 0)
 183                         {
 184                         genkey=1;
 185                         need_rand=1;
 186                         }
 187                 else if (strcmp(*argv,"-rand") == 0)
 188                         {
 189                         if (--argc < 1) goto bad;
 190                         inrand= *(++argv);
 191                         need_rand=1;
 192                         }
 193                 else if (strcmp(*argv,"-noout") == 0)
 194                         noout=1;
 195                 else if (strcmp(*argv,"-non-fips-allow") == 0)
 196                         non_fips_allow = 1;
 197                 else if (sscanf(*argv,"%d",&num) == 1)
 198                         {
 199                         /* generate a key */
 200                         numbits=num;
 201                         need_rand=1;
 202                         }
 203                 else
 204                         {
 205                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 206                         badops=1;
 207                         break;
 208                         }
 209                 argc--;
 210                 argv++;
 211                 }
 212
 213         if (badops)
 214                 {
 215 bad:
 216                 BIO_printf(bio_err,"%s [options] [bits] <infile >outfile\n",prog);
 217                 BIO_printf(bio_err,"where options are\n");
 218                 BIO_printf(bio_err," -inform arg   input format - DER or PEM\n");
 219                 BIO_printf(bio_err," -outform arg  output format - DER or PEM\n");
 220                 BIO_printf(bio_err," -in arg       input file\n");
 221                 BIO_printf(bio_err," -out arg      output file\n");
 222                 BIO_printf(bio_err," -text         print as text\n");
 223                 BIO_printf(bio_err," -C            Output C code\n");
 224                 BIO_printf(bio_err," -noout        no output\n");
 225                 BIO_printf(bio_err," -genkey       generate a DSA key\n");
 226                 BIO_printf(bio_err," -rand         files to use for random number input\n");
 227 #ifndef OPENSSL_NO_ENGINE
 228                 BIO_printf(bio_err," -engine e     use engine e, possibly a hardware device.\n");
 229 #endif
 230 #ifdef GENCB_TEST
 231                 BIO_printf(bio_err," -timebomb n   interrupt keygen after <n> seconds\n");
 232 #endif
 233                 BIO_printf(bio_err," number        number of bits to use for generating private key\n");
 234                 goto end;
 235                 }
 236
 237         ERR_load_crypto_strings();
 238
 239         in=BIO_new(BIO_s_file());
 240         out=BIO_new(BIO_s_file());
 241         if ((in == NULL) || (out == NULL))
 242                 {
 243                 ERR_print_errors(bio_err);
 244                 goto end;
 245                 }
 246
 247         if (infile == NULL)
 248                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 249         else
 250                 {
 251                 if (BIO_read_filename(in,infile) <= 0)
 252                         {
 253                         perror(infile);
 254                         goto end;
 255                         }
 256                 }
 257         if (outfile == NULL)
 258                 {
 259                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 260 #ifdef OPENSSL_SYS_VMS
 261                 {
 262                 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 263                 out = BIO_push(tmpbio, out);
 264                 }
 265 #endif
 266                 }
 267         else
 268                 {
 269                 if (BIO_write_filename(out,outfile) <= 0)
 270                         {
 271                         perror(outfile);
 272                         goto end;
 273                         }
 274                 }
 275
 276 #ifndef OPENSSL_NO_ENGINE
 277         setup_engine(bio_err, engine, 0);
 278 #endif
 279
 280         if (need_rand)
 281                 {
 282                 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
 283                 if (inrand != NULL)
 284                         BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 285                                 app_RAND_load_files(inrand));
 286                 }
 287
 288         if (numbits > 0)
 289                 {
 290                 cb = BN_GENCB_new();
 291                 if(!cb)
 292                         {
 293                         BIO_printf(bio_err,"Error allocating BN_GENCB object\n");
 294                         goto end;
 295                         }
 296                 BN_GENCB_set(cb, dsa_cb, bio_err);
 297                 assert(need_rand);
 298                 dsa = DSA_new();
 299                 if(!dsa)
 300                         {
 301                         BIO_printf(bio_err,"Error allocating DSA object\n");
 302                         goto end;
 303                         }
 304                 if (non_fips_allow)
 305                         dsa->flags |= DSA_FLAG_NON_FIPS_ALLOW;
 306                 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
 307                 BIO_printf(bio_err,"This could take some time\n");
 308 #ifdef GENCB_TEST
 309                 if(timebomb > 0)
 310         {
 311                 struct sigaction act;
 312                 act.sa_handler = timebomb_sigalarm;
 313                 act.sa_flags = 0;
 314                 BIO_printf(bio_err,"(though I'll stop it if not done within %d secs)\n",
 315                                 timebomb);
 316                 if(sigaction(SIGALRM, &act, NULL) != 0)
 317                         {
 318                         BIO_printf(bio_err,"Error, couldn't set SIGALRM handler\n");
 319                         goto end;
 320                         }
 321                 alarm(timebomb);
 322         }
 323 #endif
 324                 if(!DSA_generate_parameters_ex(dsa,num,NULL,0,NULL,NULL, cb))
 325                         {
 326 #ifdef GENCB_TEST
 327                         if(stop_keygen_flag)
 328                                 {
 329                                 BIO_printf(bio_err,"DSA key generation time-stopped\n");
 330                                 /* This is an asked-for behaviour! */
 331                                 ret = 0;
 332                                 goto end;
 333                                 }
 334 #endif
 335                         ERR_print_errors(bio_err);
 336                         BIO_printf(bio_err,"Error, DSA key generation failed\n");
 337                         goto end;
 338                         }
 339                 }
 340         else if (informat == FORMAT_ASN1)
 341                 dsa=d2i_DSAparams_bio(in,NULL);
 342         else if (informat == FORMAT_PEM)
 343                 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL);
 344         else
 345                 {
 346                 BIO_printf(bio_err,"bad input format specified\n");
 347                 goto end;
 348                 }
 349         if (dsa == NULL)
 350                 {
 351                 BIO_printf(bio_err,"unable to load DSA parameters\n");
 352                 ERR_print_errors(bio_err);
 353                 goto end;
 354                 }
 355
 356         if (text)
 357                 {
 358                 DSAparams_print(out,dsa);
 359                 }
 360
 361         if (C)
 362                 {
 363                 unsigned char *data;
 364                 int l,len,bits_p;
 365
 366                 len=BN_num_bytes(dsa->p);
 367                 bits_p=BN_num_bits(dsa->p);
 368                 data=(unsigned char *)OPENSSL_malloc(len+20);
 369                 if (data == NULL)
 370                         {
 371                         perror("OPENSSL_malloc");
 372                         goto end;
 373                         }
 374                 l=BN_bn2bin(dsa->p,data);
 375                 printf("static unsigned char dsa%d_p[]={",bits_p);
 376                 for (i=0; i<l; i++)
 377                         {
 378                         if ((i%12) == 0) printf("\n\t");
 379                         printf("0x%02X,",data[i]);
 380                         }
 381                 printf("\n\t};\n");
 382
 383                 l=BN_bn2bin(dsa->q,data);
 384                 printf("static unsigned char dsa%d_q[]={",bits_p);
 385                 for (i=0; i<l; i++)
 386                         {
 387                         if ((i%12) == 0) printf("\n\t");
 388                         printf("0x%02X,",data[i]);
 389                         }
 390                 printf("\n\t};\n");
 391
 392                 l=BN_bn2bin(dsa->g,data);
 393                 printf("static unsigned char dsa%d_g[]={",bits_p);
 394                 for (i=0; i<l; i++)
 395                         {
 396                         if ((i%12) == 0) printf("\n\t");
 397                         printf("0x%02X,",data[i]);
 398                         }
 399                 printf("\n\t};\n\n");
 400
 401                 printf("DSA *get_dsa%d()\n\t{\n",bits_p);
 402                 printf("\tDSA *dsa;\n\n");
 403                 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
 404                 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
 405                         bits_p,bits_p);
 406                 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
 407                         bits_p,bits_p);
 408                 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
 409                         bits_p,bits_p);
 410                 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
 411                 printf("\t\t{ DSA_free(dsa); return(NULL); }\n");
 412                 printf("\treturn(dsa);\n\t}\n");
 413                 }
 414
 415
 416         if (!noout)
 417                 {
 418                 if      (outformat == FORMAT_ASN1)
 419                         i=i2d_DSAparams_bio(out,dsa);
 420                 else if (outformat == FORMAT_PEM)
 421                         i=PEM_write_bio_DSAparams(out,dsa);
 422                 else    {
 423                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 424                         goto end;
 425                         }
 426                 if (!i)
 427                         {
 428                         BIO_printf(bio_err,"unable to write DSA parameters\n");
 429                         ERR_print_errors(bio_err);
 430                         goto end;
 431                         }
 432                 }
 433         if (genkey)
 434                 {
 435                 DSA *dsakey;
 436
 437                 assert(need_rand);
 438                 if ((dsakey=DSAparams_dup(dsa)) == NULL) goto end;
 439                 if (non_fips_allow)
 440                         dsakey->flags |= DSA_FLAG_NON_FIPS_ALLOW;
 441                 if (!DSA_generate_key(dsakey))
 442                         {
 443                         ERR_print_errors(bio_err);
 444                         DSA_free(dsakey);
 445                         goto end;
 446                         }
 447                 if      (outformat == FORMAT_ASN1)
 448                         i=i2d_DSAPrivateKey_bio(out,dsakey);
 449                 else if (outformat == FORMAT_PEM)
 450                         i=PEM_write_bio_DSAPrivateKey(out,dsakey,NULL,NULL,0,NULL,NULL);
 451                 else    {
 452                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 453                         DSA_free(dsakey);
 454                         goto end;
 455                         }
 456                 DSA_free(dsakey);
 457                 }
 458         if (need_rand)
 459                 app_RAND_write_file(NULL, bio_err);
 460         ret=0;
 461 end:
 462         if (cb != NULL) BN_GENCB_free(cb);
 463         if (in != NULL) BIO_free(in);
 464         if (out != NULL) BIO_free_all(out);
 465         if (dsa != NULL) DSA_free(dsa);
 466         apps_shutdown();
 467         OPENSSL_EXIT(ret);
 468         }
 469
 470 static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb)
 471         {
 472         char c='*';
 473
 474         if (p == 0) c='.';
 475         if (p == 1) c='+';
 476         if (p == 2) c='*';
 477         if (p == 3) c='\n';
 478         BIO_write(BN_GENCB_get_arg(cb),&c,1);
 479         (void)BIO_flush(BN_GENCB_get_arg(cb));
 480 #ifdef GENCB_TEST
 481         if(stop_keygen_flag)
 482                 return 0;
 483 #endif
 484         return 1;
 485         }
 486 #else /* !OPENSSL_NO_DSA */
 487
 488 # if PEDANTIC
 489 static void *dummy=&dummy;
 490 # endif
 491
 492 #endif