apps/genrsa.c

   1 /* apps/genrsa.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>
  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_RSA
  69 # include <stdio.h>
  70 # include <string.h>
  71 # include <sys/types.h>
  72 # include <sys/stat.h>
  73 # include "apps.h"
  74 # include <openssl/bio.h>
  75 # include <openssl/err.h>
  76 # include <openssl/bn.h>
  77 # include <openssl/rsa.h>
  78 # include <openssl/evp.h>
  79 # include <openssl/x509.h>
  80 # include <openssl/pem.h>
  81 # include <openssl/rand.h>
  82
  83 # define DEFBITS 512
  84 # undef PROG
  85 # define PROG genrsa_main
  86
  87 static int MS_CALLBACK genrsa_cb(int p, int n, BN_GENCB *cb);
  88
  89 int MAIN(int, char **);
  90
  91 int MAIN(int argc, char **argv)
  92 {
  93     BN_GENCB cb;
  94     int ret = 1;
  95     int i, num = DEFBITS;
  96     long l;
  97     int use_x931 = 0;
  98     const EVP_CIPHER *enc = NULL;
  99     unsigned long f4 = RSA_F4;
 100     char *outfile = NULL;
 101     char *passargout = NULL, *passout = NULL;
 102 # ifndef OPENSSL_NO_ENGINE
 103     char *engine = NULL;
 104 # endif
 105     char *inrand = NULL;
 106     BIO *out = NULL;
 107     BIGNUM *bn = BN_new();
 108     RSA *rsa = NULL;
 109
 110     if (!bn)
 111         goto err;
 112
 113     apps_startup();
 114     BN_GENCB_set(&cb, genrsa_cb, bio_err);
 115
 116     if (bio_err == NULL)
 117         if ((bio_err = BIO_new(BIO_s_file())) != NULL)
 118             BIO_set_fp(bio_err, stderr, BIO_NOCLOSE | BIO_FP_TEXT);
 119
 120     if (!load_config(bio_err, NULL))
 121         goto err;
 122     if ((out = BIO_new(BIO_s_file())) == NULL) {
 123         BIO_printf(bio_err, "unable to create BIO for output\n");
 124         goto err;
 125     }
 126
 127     argv++;
 128     argc--;
 129     for (;;) {
 130         if (argc <= 0)
 131             break;
 132         if (strcmp(*argv, "-out") == 0) {
 133             if (--argc < 1)
 134                 goto bad;
 135             outfile = *(++argv);
 136         } else if (strcmp(*argv, "-3") == 0)
 137             f4 = 3;
 138         else if (strcmp(*argv, "-F4") == 0 || strcmp(*argv, "-f4") == 0)
 139             f4 = RSA_F4;
 140         else if (strcmp(*argv, "-x931") == 0)
 141             use_x931 = 1;
 142 # ifndef OPENSSL_NO_ENGINE
 143         else if (strcmp(*argv, "-engine") == 0) {
 144             if (--argc < 1)
 145                 goto bad;
 146             engine = *(++argv);
 147         }
 148 # endif
 149         else if (strcmp(*argv, "-rand") == 0) {
 150             if (--argc < 1)
 151                 goto bad;
 152             inrand = *(++argv);
 153         }
 154 # ifndef OPENSSL_NO_DES
 155         else if (strcmp(*argv, "-des") == 0)
 156             enc = EVP_des_cbc();
 157         else if (strcmp(*argv, "-des3") == 0)
 158             enc = EVP_des_ede3_cbc();
 159 # endif
 160 # ifndef OPENSSL_NO_IDEA
 161         else if (strcmp(*argv, "-idea") == 0)
 162             enc = EVP_idea_cbc();
 163 # endif
 164 # ifndef OPENSSL_NO_SEED
 165         else if (strcmp(*argv, "-seed") == 0)
 166             enc = EVP_seed_cbc();
 167 # endif
 168 # ifndef OPENSSL_NO_AES
 169         else if (strcmp(*argv, "-aes128") == 0)
 170             enc = EVP_aes_128_cbc();
 171         else if (strcmp(*argv, "-aes192") == 0)
 172             enc = EVP_aes_192_cbc();
 173         else if (strcmp(*argv, "-aes256") == 0)
 174             enc = EVP_aes_256_cbc();
 175 # endif
 176 # ifndef OPENSSL_NO_CAMELLIA
 177         else if (strcmp(*argv, "-camellia128") == 0)
 178             enc = EVP_camellia_128_cbc();
 179         else if (strcmp(*argv, "-camellia192") == 0)
 180             enc = EVP_camellia_192_cbc();
 181         else if (strcmp(*argv, "-camellia256") == 0)
 182             enc = EVP_camellia_256_cbc();
 183 # endif
 184         else if (strcmp(*argv, "-passout") == 0) {
 185             if (--argc < 1)
 186                 goto bad;
 187             passargout = *(++argv);
 188         } else
 189             break;
 190         argv++;
 191         argc--;
 192     }
 193     if ((argc >= 1) && ((sscanf(*argv, "%d", &num) == 0) || (num < 0))) {
 194  bad:
 195         BIO_printf(bio_err, "usage: genrsa [args] [numbits]\n");
 196         BIO_printf(bio_err,
 197                    " -des            encrypt the generated key with DES in cbc mode\n");
 198         BIO_printf(bio_err,
 199                    " -des3           encrypt the generated key with DES in ede cbc mode (168 bit key)\n");
 200 # ifndef OPENSSL_NO_IDEA
 201         BIO_printf(bio_err,
 202                    " -idea           encrypt the generated key with IDEA in cbc mode\n");
 203 # endif
 204 # ifndef OPENSSL_NO_SEED
 205         BIO_printf(bio_err, " -seed\n");
 206         BIO_printf(bio_err,
 207                    "                 encrypt PEM output with cbc seed\n");
 208 # endif
 209 # ifndef OPENSSL_NO_AES
 210         BIO_printf(bio_err, " -aes128, -aes192, -aes256\n");
 211         BIO_printf(bio_err,
 212                    "                 encrypt PEM output with cbc aes\n");
 213 # endif
 214 # ifndef OPENSSL_NO_CAMELLIA
 215         BIO_printf(bio_err, " -camellia128, -camellia192, -camellia256\n");
 216         BIO_printf(bio_err,
 217                    "                 encrypt PEM output with cbc camellia\n");
 218 # endif
 219         BIO_printf(bio_err, " -out file       output the key to 'file\n");
 220         BIO_printf(bio_err,
 221                    " -passout arg    output file pass phrase source\n");
 222         BIO_printf(bio_err,
 223                    " -f4             use F4 (0x10001) for the E value\n");
 224         BIO_printf(bio_err, " -3              use 3 for the E value\n");
 225 # ifndef OPENSSL_NO_ENGINE
 226         BIO_printf(bio_err,
 227                    " -engine e       use engine e, possibly a hardware device.\n");
 228 # endif
 229         BIO_printf(bio_err, " -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR,
 230                    LIST_SEPARATOR_CHAR);
 231         BIO_printf(bio_err,
 232                    "                 load the file (or the files in the directory) into\n");
 233         BIO_printf(bio_err, "                 the random number generator\n");
 234         goto err;
 235     }
 236
 237     ERR_load_crypto_strings();
 238
 239     if (!app_passwd(bio_err, NULL, passargout, NULL, &passout)) {
 240         BIO_printf(bio_err, "Error getting password\n");
 241         goto err;
 242     }
 243 # ifndef OPENSSL_NO_ENGINE
 244     setup_engine(bio_err, engine, 0);
 245 # endif
 246
 247     if (outfile == NULL) {
 248         BIO_set_fp(out, stdout, BIO_NOCLOSE);
 249 # ifdef OPENSSL_SYS_VMS
 250         {
 251             BIO *tmpbio = BIO_new(BIO_f_linebuffer());
 252             out = BIO_push(tmpbio, out);
 253         }
 254 # endif
 255     } else {
 256         if (BIO_write_filename(out, outfile) <= 0) {
 257             perror(outfile);
 258             goto err;
 259         }
 260     }
 261
 262     if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL
 263         && !RAND_status()) {
 264         BIO_printf(bio_err,
 265                    "warning, not much extra random data, consider using the -rand option\n");
 266     }
 267     if (inrand != NULL)
 268         BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
 269                    app_RAND_load_files(inrand));
 270
 271     BIO_printf(bio_err, "Generating RSA private key, %d bit long modulus\n",
 272                num);
 273
 274     rsa = RSA_new();
 275     if (!rsa)
 276         goto err;
 277
 278     if (use_x931) {
 279         BIGNUM *pubexp;
 280         pubexp = BN_new();
 281         if (!BN_set_word(pubexp, f4))
 282             goto err;
 283         if (!RSA_X931_generate_key_ex(rsa, num, pubexp, &cb))
 284             goto err;
 285         BN_free(pubexp);
 286     } else if (!BN_set_word(bn, f4)
 287                || !RSA_generate_key_ex(rsa, num, bn, &cb))
 288         goto err;
 289
 290     app_RAND_write_file(NULL, bio_err);
 291
 292     /*
 293      * We need to do the following for when the base number size is < long,
 294      * esp windows 3.1 :-(.
 295      */
 296     l = 0L;
 297     for (i = 0; i < rsa->e->top; i++) {
 298 # ifndef SIXTY_FOUR_BIT
 299         l <<= BN_BITS4;
 300         l <<= BN_BITS4;
 301 # endif
 302         l += rsa->e->d[i];
 303     }
 304     BIO_printf(bio_err, "e is %ld (0x%lX)\n", l, l);
 305     {
 306         PW_CB_DATA cb_data;
 307         cb_data.password = passout;
 308         cb_data.prompt_info = outfile;
 309         if (!PEM_write_bio_RSAPrivateKey(out, rsa, enc, NULL, 0,
 310                                          (pem_password_cb *)password_callback,
 311                                          &cb_data))
 312             goto err;
 313     }
 314
 315     ret = 0;
 316  err:
 317     if (bn)
 318         BN_free(bn);
 319     if (rsa)
 320         RSA_free(rsa);
 321     if (out)
 322         BIO_free_all(out);
 323     if (passout)
 324         OPENSSL_free(passout);
 325     if (ret != 0)
 326         ERR_print_errors(bio_err);
 327     apps_shutdown();
 328     OPENSSL_EXIT(ret);
 329 }
 330
 331 static int MS_CALLBACK genrsa_cb(int p, int n, BN_GENCB *cb)
 332 {
 333     char c = '*';
 334
 335     if (p == 0)
 336         c = '.';
 337     if (p == 1)
 338         c = '+';
 339     if (p == 2)
 340         c = '*';
 341     if (p == 3)
 342         c = '\n';
 343     BIO_write(cb->arg, &c, 1);
 344     (void)BIO_flush(cb->arg);
 345 # ifdef LINT
 346     p = n;
 347 # endif
 348     return 1;
 349 }
 350 #else                           /* !OPENSSL_NO_RSA */
 351
 352 # if PEDANTIC
 353 static void *dummy = &dummy;
 354 # endif
 355
 356 #endif