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         DSA *dsa=NULL;
 115         int i,badops=0,text=0;
 116         BIO *in=NULL,*out=NULL;
 117         int informat,outformat,noout=0,C=0,ret=1;
 118         char *infile,*outfile,*prog,*inrand=NULL;
 119         int numbits= -1,num,genkey=0;
 120         int need_rand=0;
 121 #ifndef OPENSSL_NO_ENGINE
 122         char *engine=NULL;
 123 #endif
 124 #ifdef GENCB_TEST
 125         int timebomb=0;
 126 #endif
 127
 128         apps_startup();
 129
 130         if (bio_err == NULL)
 131                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 132                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 133
 134         if (!load_config(bio_err, NULL))
 135                 goto end;
 136
 137         infile=NULL;
 138         outfile=NULL;
 139         informat=FORMAT_PEM;
 140         outformat=FORMAT_PEM;
 141
 142         prog=argv[0];
 143         argc--;
 144         argv++;
 145         while (argc >= 1)
 146                 {
 147                 if      (strcmp(*argv,"-inform") == 0)
 148                         {
 149                         if (--argc < 1) goto bad;
 150                         informat=str2fmt(*(++argv));
 151                         }
 152                 else if (strcmp(*argv,"-outform") == 0)
 153                         {
 154                         if (--argc < 1) goto bad;
 155                         outformat=str2fmt(*(++argv));
 156                         }
 157                 else if (strcmp(*argv,"-in") == 0)
 158                         {
 159                         if (--argc < 1) goto bad;
 160                         infile= *(++argv);
 161                         }
 162                 else if (strcmp(*argv,"-out") == 0)
 163                         {
 164                         if (--argc < 1) goto bad;
 165                         outfile= *(++argv);
 166                         }
 167 #ifndef OPENSSL_NO_ENGINE
 168                 else if(strcmp(*argv, "-engine") == 0)
 169                         {
 170                         if (--argc < 1) goto bad;
 171                         engine = *(++argv);
 172                         }
 173 #endif
 174 #ifdef GENCB_TEST
 175                 else if(strcmp(*argv, "-timebomb") == 0)
 176                         {
 177                         if (--argc < 1) goto bad;
 178                         timebomb = atoi(*(++argv));
 179                         }
 180 #endif
 181                 else if (strcmp(*argv,"-text") == 0)
 182                         text=1;
 183                 else if (strcmp(*argv,"-C") == 0)
 184                         C=1;
 185                 else if (strcmp(*argv,"-genkey") == 0)
 186                         {
 187                         genkey=1;
 188                         need_rand=1;
 189                         }
 190                 else if (strcmp(*argv,"-rand") == 0)
 191                         {
 192                         if (--argc < 1) goto bad;
 193                         inrand= *(++argv);
 194                         need_rand=1;
 195                         }
 196                 else if (strcmp(*argv,"-noout") == 0)
 197                         noout=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                 BN_GENCB cb;
 292                 BN_GENCB_set(&cb, dsa_cb, bio_err);
 293                 assert(need_rand);
 294                 dsa = DSA_new();
 295                 if(!dsa)
 296                         {
 297                         BIO_printf(bio_err,"Error allocating DSA object\n");
 298                         goto end;
 299                         }
 300                 BIO_printf(bio_err,"Generating DSA parameters, %d bit long prime\n",num);
 301                 BIO_printf(bio_err,"This could take some time\n");
 302 #ifdef GENCB_TEST
 303                 if(timebomb > 0)
 304         {
 305                 struct sigaction act;
 306                 act.sa_handler = timebomb_sigalarm;
 307                 act.sa_flags = 0;
 308                 BIO_printf(bio_err,"(though I'll stop it if not done within %d secs)\n",
 309                                 timebomb);
 310                 if(sigaction(SIGALRM, &act, NULL) != 0)
 311                         {
 312                         BIO_printf(bio_err,"Error, couldn't set SIGALRM handler\n");
 313                         goto end;
 314                         }
 315                 alarm(timebomb);
 316         }
 317 #endif
 318                 if(!DSA_generate_parameters_ex(dsa,num,NULL,0,NULL,NULL, &cb))
 319                         {
 320 #ifdef GENCB_TEST
 321                         if(stop_keygen_flag)
 322                                 {
 323                                 BIO_printf(bio_err,"DSA key generation time-stopped\n");
 324                                 /* This is an asked-for behaviour! */
 325                                 ret = 0;
 326                                 goto end;
 327                                 }
 328 #endif
 329                         BIO_printf(bio_err,"Error, DSA key generation failed\n");
 330                         goto end;
 331                         }
 332                 }
 333         else if (informat == FORMAT_ASN1)
 334                 dsa=d2i_DSAparams_bio(in,NULL);
 335         else if (informat == FORMAT_PEM)
 336                 dsa=PEM_read_bio_DSAparams(in,NULL,NULL,NULL);
 337         else
 338                 {
 339                 BIO_printf(bio_err,"bad input format specified\n");
 340                 goto end;
 341                 }
 342         if (dsa == NULL)
 343                 {
 344                 BIO_printf(bio_err,"unable to load DSA parameters\n");
 345                 ERR_print_errors(bio_err);
 346                 goto end;
 347                 }
 348
 349         if (text)
 350                 {
 351                 DSAparams_print(out,dsa);
 352                 }
 353
 354         if (C)
 355                 {
 356                 unsigned char *data;
 357                 int l,len,bits_p;
 358
 359                 len=BN_num_bytes(dsa->p);
 360                 bits_p=BN_num_bits(dsa->p);
 361                 data=(unsigned char *)OPENSSL_malloc(len+20);
 362                 if (data == NULL)
 363                         {
 364                         perror("OPENSSL_malloc");
 365                         goto end;
 366                         }
 367                 l=BN_bn2bin(dsa->p,data);
 368                 printf("static unsigned char dsa%d_p[]={",bits_p);
 369                 for (i=0; i<l; i++)
 370                         {
 371                         if ((i%12) == 0) printf("\n\t");
 372                         printf("0x%02X,",data[i]);
 373                         }
 374                 printf("\n\t};\n");
 375
 376                 l=BN_bn2bin(dsa->q,data);
 377                 printf("static unsigned char dsa%d_q[]={",bits_p);
 378                 for (i=0; i<l; i++)
 379                         {
 380                         if ((i%12) == 0) printf("\n\t");
 381                         printf("0x%02X,",data[i]);
 382                         }
 383                 printf("\n\t};\n");
 384
 385                 l=BN_bn2bin(dsa->g,data);
 386                 printf("static unsigned char dsa%d_g[]={",bits_p);
 387                 for (i=0; i<l; i++)
 388                         {
 389                         if ((i%12) == 0) printf("\n\t");
 390                         printf("0x%02X,",data[i]);
 391                         }
 392                 printf("\n\t};\n\n");
 393
 394                 printf("DSA *get_dsa%d()\n\t{\n",bits_p);
 395                 printf("\tDSA *dsa;\n\n");
 396                 printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
 397                 printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
 398                         bits_p,bits_p);
 399                 printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
 400                         bits_p,bits_p);
 401                 printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
 402                         bits_p,bits_p);
 403                 printf("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
 404                 printf("\t\t{ DSA_free(dsa); return(NULL); }\n");
 405                 printf("\treturn(dsa);\n\t}\n");
 406                 }
 407
 408
 409         if (!noout)
 410                 {
 411                 if      (outformat == FORMAT_ASN1)
 412                         i=i2d_DSAparams_bio(out,dsa);
 413                 else if (outformat == FORMAT_PEM)
 414                         i=PEM_write_bio_DSAparams(out,dsa);
 415                 else    {
 416                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 417                         goto end;
 418                         }
 419                 if (!i)
 420                         {
 421                         BIO_printf(bio_err,"unable to write DSA parameters\n");
 422                         ERR_print_errors(bio_err);
 423                         goto end;
 424                         }
 425                 }
 426         if (genkey)
 427                 {
 428                 DSA *dsakey;
 429
 430                 assert(need_rand);
 431                 if ((dsakey=DSAparams_dup(dsa)) == NULL) goto end;
 432                 if (!DSA_generate_key(dsakey)) goto end;
 433                 if      (outformat == FORMAT_ASN1)
 434                         i=i2d_DSAPrivateKey_bio(out,dsakey);
 435                 else if (outformat == FORMAT_PEM)
 436                         i=PEM_write_bio_DSAPrivateKey(out,dsakey,NULL,NULL,0,NULL,NULL);
 437                 else    {
 438                         BIO_printf(bio_err,"bad output format specified for outfile\n");
 439                         goto end;
 440                         }
 441                 DSA_free(dsakey);
 442                 }
 443         if (need_rand)
 444                 app_RAND_write_file(NULL, bio_err);
 445         ret=0;
 446 end:
 447         if (in != NULL) BIO_free(in);
 448         if (out != NULL) BIO_free_all(out);
 449         if (dsa != NULL) DSA_free(dsa);
 450         apps_shutdown();
 451         OPENSSL_EXIT(ret);
 452         }
 453
 454 static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb)
 455         {
 456         char c='*';
 457
 458         if (p == 0) c='.';
 459         if (p == 1) c='+';
 460         if (p == 2) c='*';
 461         if (p == 3) c='\n';
 462         BIO_write(cb->arg,&c,1);
 463         (void)BIO_flush(cb->arg);
 464 #ifdef LINT
 465         p=n;
 466 #endif
 467 #ifdef GENCB_TEST
 468         if(stop_keygen_flag)
 469                 return 0;
 470 #endif
 471         return 1;
 472         }
 473 #else /* !OPENSSL_NO_DSA */
 474
 475 # if PEDANTIC
 476 static void *dummy=&dummy;
 477 # endif
 478
 479 #endif