crypto/openssl-0.9/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 /* -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