crypto/openssl/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  * Until the key-gen callbacks are modified to use newer prototypes, we allow
  62  * deprecated functions for openssl-internal code
  63  */
  64 #ifdef OPENSSL_NO_DEPRECATED
  65 # undef OPENSSL_NO_DEPRECATED
  66 #endif
  67
  68 #ifndef OPENSSL_NO_DSA
  69 # include <assert.h>
  70 # include <stdio.h>
  71 # include <stdlib.h>
  72 # include <time.h>
  73 # include <string.h>
  74 # include "apps.h"
  75 # include <openssl/bio.h>
  76 # include <openssl/err.h>
  77 # include <openssl/bn.h>
  78 # include <openssl/dsa.h>
  79 # include <openssl/x509.h>
  80 # include <openssl/pem.h>
  81
  82 # undef PROG
  83 # define PROG    dsaparam_main
  84
  85 /*-
  86  * -inform arg  - input format - default PEM (DER or PEM)
  87  * -outform arg - output format - default PEM
  88  * -in arg      - input file - default stdin
  89  * -out arg     - output file - default stdout
  90  * -noout
  91  * -text
  92  * -C
  93  * -noout
  94  * -genkey
  95  *  #ifdef GENCB_TEST
  96  * -timebomb n  - interrupt keygen after <n> seconds
  97  *  #endif
  98  */
  99
 100 # ifdef GENCB_TEST
 101
 102 static int stop_keygen_flag = 0;
 103
 104 static void timebomb_sigalarm(int foo)
 105 {
 106     stop_keygen_flag = 1;
 107 }
 108
 109 # endif
 110
 111 static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb);
 112
 113 int MAIN(int, char **);
 114
 115 int MAIN(int argc, char **argv)
 116 {
 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         if (strcmp(*argv, "-inform") == 0) {
 150             if (--argc < 1)
 151                 goto bad;
 152             informat = str2fmt(*(++argv));
 153         } else if (strcmp(*argv, "-outform") == 0) {
 154             if (--argc < 1)
 155                 goto bad;
 156             outformat = str2fmt(*(++argv));
 157         } else if (strcmp(*argv, "-in") == 0) {
 158             if (--argc < 1)
 159                 goto bad;
 160             infile = *(++argv);
 161         } else if (strcmp(*argv, "-out") == 0) {
 162             if (--argc < 1)
 163                 goto bad;
 164             outfile = *(++argv);
 165         }
 166 # ifndef OPENSSL_NO_ENGINE
 167         else if (strcmp(*argv, "-engine") == 0) {
 168             if (--argc < 1)
 169                 goto bad;
 170             engine = *(++argv);
 171         }
 172 # endif
 173 # ifdef GENCB_TEST
 174         else if (strcmp(*argv, "-timebomb") == 0) {
 175             if (--argc < 1)
 176                 goto bad;
 177             timebomb = atoi(*(++argv));
 178         }
 179 # endif
 180         else if (strcmp(*argv, "-text") == 0)
 181             text = 1;
 182         else if (strcmp(*argv, "-C") == 0)
 183             C = 1;
 184         else if (strcmp(*argv, "-genkey") == 0) {
 185             genkey = 1;
 186             need_rand = 1;
 187         } else if (strcmp(*argv, "-rand") == 0) {
 188             if (--argc < 1)
 189                 goto bad;
 190             inrand = *(++argv);
 191             need_rand = 1;
 192         } else if (strcmp(*argv, "-noout") == 0)
 193             noout = 1;
 194         else if (sscanf(*argv, "%d", &num) == 1) {
 195             /* generate a key */
 196             numbits = num;
 197             need_rand = 1;
 198         } else {
 199             BIO_printf(bio_err, "unknown option %s\n", *argv);
 200             badops = 1;
 201             break;
 202         }
 203         argc--;
 204         argv++;
 205     }
 206
 207     if (badops) {
 208  bad:
 209         BIO_printf(bio_err, "%s [options] [bits] <infile >outfile\n", prog);
 210         BIO_printf(bio_err, "where options are\n");
 211         BIO_printf(bio_err, " -inform arg   input format - DER or PEM\n");
 212         BIO_printf(bio_err, " -outform arg  output format - DER or PEM\n");
 213         BIO_printf(bio_err, " -in arg       input file\n");
 214         BIO_printf(bio_err, " -out arg      output file\n");
 215         BIO_printf(bio_err, " -text         print as text\n");
 216         BIO_printf(bio_err, " -C            Output C code\n");
 217         BIO_printf(bio_err, " -noout        no output\n");
 218         BIO_printf(bio_err, " -genkey       generate a DSA key\n");
 219         BIO_printf(bio_err,
 220                    " -rand         files to use for random number input\n");
 221 # ifndef OPENSSL_NO_ENGINE
 222         BIO_printf(bio_err,
 223                    " -engine e     use engine e, possibly a hardware device.\n");
 224 # endif
 225 # ifdef GENCB_TEST
 226         BIO_printf(bio_err,
 227                    " -timebomb n   interrupt keygen after <n> seconds\n");
 228 # endif
 229         BIO_printf(bio_err,
 230                    " number        number of bits to use for generating private key\n");
 231         goto end;
 232     }
 233
 234     ERR_load_crypto_strings();
 235
 236     in = BIO_new(BIO_s_file());
 237     out = BIO_new(BIO_s_file());
 238     if ((in == NULL) || (out == NULL)) {
 239         ERR_print_errors(bio_err);
 240         goto end;
 241     }
 242
 243     if (infile == NULL)
 244         BIO_set_fp(in, stdin, BIO_NOCLOSE);
 245     else {
 246         if (BIO_read_filename(in, infile) <= 0) {
 247             perror(infile);
 248             goto end;
 249         }
 250     }
 251     if (outfile == NULL) {
 252         BIO_set_fp(out, stdout, BIO_NOCLOSE);
 253 # ifdef OPENSSL_SYS_VMS
 254         {
 255             BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 256             out = BIO_push(tmpbio, out);
 257         }
 258 # endif
 259     } else {
 260         if (BIO_write_filename(out, outfile) <= 0) {
 261             perror(outfile);
 262             goto end;
 263         }
 264     }
 265
 266 # ifndef OPENSSL_NO_ENGINE
 267     setup_engine(bio_err, engine, 0);
 268 # endif
 269
 270     if (need_rand) {
 271         app_RAND_load_file(NULL, bio_err, (inrand != NULL));
 272         if (inrand != NULL)
 273             BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
 274                        app_RAND_load_files(inrand));
 275     }
 276
 277     if (numbits > 0) {
 278         BN_GENCB cb;
 279         BN_GENCB_set(&cb, dsa_cb, bio_err);
 280         assert(need_rand);
 281         dsa = DSA_new();
 282         if (!dsa) {
 283             BIO_printf(bio_err, "Error allocating DSA object\n");
 284             goto end;
 285         }
 286         BIO_printf(bio_err, "Generating DSA parameters, %d bit long prime\n",
 287                    num);
 288         BIO_printf(bio_err, "This could take some time\n");
 289 # ifdef GENCB_TEST
 290         if (timebomb > 0) {
 291             struct sigaction act;
 292             act.sa_handler = timebomb_sigalarm;
 293             act.sa_flags = 0;
 294             BIO_printf(bio_err,
 295                        "(though I'll stop it if not done within %d secs)\n",
 296                        timebomb);
 297             if (sigaction(SIGALRM, &act, NULL) != 0) {
 298                 BIO_printf(bio_err, "Error, couldn't set SIGALRM handler\n");
 299                 goto end;
 300             }
 301             alarm(timebomb);
 302         }
 303 # endif
 304         if (!DSA_generate_parameters_ex(dsa, num, NULL, 0, NULL, NULL, &cb)) {
 305 # ifdef GENCB_TEST
 306             if (stop_keygen_flag) {
 307                 BIO_printf(bio_err, "DSA key generation time-stopped\n");
 308                 /* This is an asked-for behaviour! */
 309                 ret = 0;
 310                 goto end;
 311             }
 312 # endif
 313             ERR_print_errors(bio_err);
 314             BIO_printf(bio_err, "Error, DSA key generation failed\n");
 315             goto end;
 316         }
 317     } else if (informat == FORMAT_ASN1)
 318         dsa = d2i_DSAparams_bio(in, NULL);
 319     else if (informat == FORMAT_PEM)
 320         dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL);
 321     else {
 322         BIO_printf(bio_err, "bad input format specified\n");
 323         goto end;
 324     }
 325     if (dsa == NULL) {
 326         BIO_printf(bio_err, "unable to load DSA parameters\n");
 327         ERR_print_errors(bio_err);
 328         goto end;
 329     }
 330
 331     if (text) {
 332         DSAparams_print(out, dsa);
 333     }
 334
 335     if (C) {
 336         unsigned char *data;
 337         int l, len, bits_p;
 338
 339         len = BN_num_bytes(dsa->p);
 340         bits_p = BN_num_bits(dsa->p);
 341         data = (unsigned char *)OPENSSL_malloc(len + 20);
 342         if (data == NULL) {
 343             perror("OPENSSL_malloc");
 344             goto end;
 345         }
 346         l = BN_bn2bin(dsa->p, data);
 347         printf("static unsigned char dsa%d_p[]={", bits_p);
 348         for (i = 0; i < l; i++) {
 349             if ((i % 12) == 0)
 350                 printf("\n\t");
 351             printf("0x%02X,", data[i]);
 352         }
 353         printf("\n\t};\n");
 354
 355         l = BN_bn2bin(dsa->q, data);
 356         printf("static unsigned char dsa%d_q[]={", bits_p);
 357         for (i = 0; i < l; i++) {
 358             if ((i % 12) == 0)
 359                 printf("\n\t");
 360             printf("0x%02X,", data[i]);
 361         }
 362         printf("\n\t};\n");
 363
 364         l = BN_bn2bin(dsa->g, data);
 365         printf("static unsigned char dsa%d_g[]={", bits_p);
 366         for (i = 0; i < l; i++) {
 367             if ((i % 12) == 0)
 368                 printf("\n\t");
 369             printf("0x%02X,", data[i]);
 370         }
 371         printf("\n\t};\n\n");
 372
 373         printf("DSA *get_dsa%d()\n\t{\n", bits_p);
 374         printf("\tDSA *dsa;\n\n");
 375         printf("\tif ((dsa=DSA_new()) == NULL) return(NULL);\n");
 376         printf("\tdsa->p=BN_bin2bn(dsa%d_p,sizeof(dsa%d_p),NULL);\n",
 377                bits_p, bits_p);
 378         printf("\tdsa->q=BN_bin2bn(dsa%d_q,sizeof(dsa%d_q),NULL);\n",
 379                bits_p, bits_p);
 380         printf("\tdsa->g=BN_bin2bn(dsa%d_g,sizeof(dsa%d_g),NULL);\n",
 381                bits_p, bits_p);
 382         printf
 383             ("\tif ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))\n");
 384         printf("\t\t{ DSA_free(dsa); return(NULL); }\n");
 385         printf("\treturn(dsa);\n\t}\n");
 386     }
 387
 388     if (!noout) {
 389         if (outformat == FORMAT_ASN1)
 390             i = i2d_DSAparams_bio(out, dsa);
 391         else if (outformat == FORMAT_PEM)
 392             i = PEM_write_bio_DSAparams(out, dsa);
 393         else {
 394             BIO_printf(bio_err, "bad output format specified for outfile\n");
 395             goto end;
 396         }
 397         if (!i) {
 398             BIO_printf(bio_err, "unable to write DSA parameters\n");
 399             ERR_print_errors(bio_err);
 400             goto end;
 401         }
 402     }
 403     if (genkey) {
 404         DSA *dsakey;
 405
 406         assert(need_rand);
 407         if ((dsakey = DSAparams_dup(dsa)) == NULL)
 408             goto end;
 409         if (!DSA_generate_key(dsakey)) {
 410             ERR_print_errors(bio_err);
 411             DSA_free(dsakey);
 412             goto end;
 413         }
 414         if (outformat == FORMAT_ASN1)
 415             i = i2d_DSAPrivateKey_bio(out, dsakey);
 416         else if (outformat == FORMAT_PEM)
 417             i = PEM_write_bio_DSAPrivateKey(out, dsakey, NULL, NULL, 0, NULL,
 418                                             NULL);
 419         else {
 420             BIO_printf(bio_err, "bad output format specified for outfile\n");
 421             DSA_free(dsakey);
 422             goto end;
 423         }
 424         DSA_free(dsakey);
 425     }
 426     if (need_rand)
 427         app_RAND_write_file(NULL, bio_err);
 428     ret = 0;
 429  end:
 430     if (in != NULL)
 431         BIO_free(in);
 432     if (out != NULL)
 433         BIO_free_all(out);
 434     if (dsa != NULL)
 435         DSA_free(dsa);
 436     apps_shutdown();
 437     OPENSSL_EXIT(ret);
 438 }
 439
 440 static int MS_CALLBACK dsa_cb(int p, int n, BN_GENCB *cb)
 441 {
 442     char c = '*';
 443
 444     if (p == 0)
 445         c = '.';
 446     if (p == 1)
 447         c = '+';
 448     if (p == 2)
 449         c = '*';
 450     if (p == 3)
 451         c = '\n';
 452     BIO_write(cb->arg, &c, 1);
 453     (void)BIO_flush(cb->arg);
 454 # ifdef LINT
 455     p = n;
 456 # endif
 457 # ifdef GENCB_TEST
 458     if (stop_keygen_flag)
 459         return 0;
 460 # endif
 461     return 1;
 462 }
 463 #else                           /* !OPENSSL_NO_DSA */
 464
 465 # if PEDANTIC
 466 static void *dummy = &dummy;
 467 # endif
 468
 469 #endif