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 #ifndef OPENSSL_NO_RSA
  62 # include <stdio.h>
  63 # include <string.h>
  64 # include <sys/types.h>
  65 # include <sys/stat.h>
  66 # include "apps.h"
  67 # include <openssl/bio.h>
  68 # include <openssl/err.h>
  69 # include <openssl/bn.h>
  70 # include <openssl/rsa.h>
  71 # include <openssl/evp.h>
  72 # include <openssl/x509.h>
  73 # include <openssl/pem.h>
  74 # include <openssl/rand.h>
  75
  76 # define DEFBITS 2048
  77 # undef PROG
  78 # define PROG genrsa_main
  79
  80 static int genrsa_cb(int p, int n, BN_GENCB *cb);
  81
  82 int MAIN(int, char **);
  83
  84 int MAIN(int argc, char **argv)
  85 {
  86     BN_GENCB *cb = NULL;
  87 # ifndef OPENSSL_NO_ENGINE
  88     ENGINE *e = NULL;
  89 # endif
  90     int ret = 1;
  91     int non_fips_allow = 0;
  92     int num = DEFBITS;
  93     const EVP_CIPHER *enc = NULL;
  94     unsigned long f4 = RSA_F4;
  95     char *outfile = NULL;
  96     char *passargout = NULL, *passout = NULL;
  97     char *hexe, *dece;
  98 # ifndef OPENSSL_NO_ENGINE
  99     char *engine = NULL;
 100 # endif
 101     char *inrand = NULL;
 102     BIO *out = NULL;
 103     BIGNUM *bn = BN_new();
 104     RSA *rsa = NULL;
 105     if (!bn)
 106         goto err;
 107
 108     cb = BN_GENCB_new();
 109     if (!cb)
 110         goto err;
 111
 112     apps_startup();
 113
 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 # ifndef OPENSSL_NO_ENGINE
 141         else if (strcmp(*argv, "-engine") == 0) {
 142             if (--argc < 1)
 143                 goto bad;
 144             engine = *(++argv);
 145         }
 146 # endif
 147         else if (strcmp(*argv, "-rand") == 0) {
 148             if (--argc < 1)
 149                 goto bad;
 150             inrand = *(++argv);
 151         }
 152 # ifndef OPENSSL_NO_DES
 153         else if (strcmp(*argv, "-des") == 0)
 154             enc = EVP_des_cbc();
 155         else if (strcmp(*argv, "-des3") == 0)
 156             enc = EVP_des_ede3_cbc();
 157 # endif
 158 # ifndef OPENSSL_NO_IDEA
 159         else if (strcmp(*argv, "-idea") == 0)
 160             enc = EVP_idea_cbc();
 161 # endif
 162 # ifndef OPENSSL_NO_SEED
 163         else if (strcmp(*argv, "-seed") == 0)
 164             enc = EVP_seed_cbc();
 165 # endif
 166 # ifndef OPENSSL_NO_AES
 167         else if (strcmp(*argv, "-aes128") == 0)
 168             enc = EVP_aes_128_cbc();
 169         else if (strcmp(*argv, "-aes192") == 0)
 170             enc = EVP_aes_192_cbc();
 171         else if (strcmp(*argv, "-aes256") == 0)
 172             enc = EVP_aes_256_cbc();
 173 # endif
 174 # ifndef OPENSSL_NO_CAMELLIA
 175         else if (strcmp(*argv, "-camellia128") == 0)
 176             enc = EVP_camellia_128_cbc();
 177         else if (strcmp(*argv, "-camellia192") == 0)
 178             enc = EVP_camellia_192_cbc();
 179         else if (strcmp(*argv, "-camellia256") == 0)
 180             enc = EVP_camellia_256_cbc();
 181 # endif
 182         else if (strcmp(*argv, "-passout") == 0) {
 183             if (--argc < 1)
 184                 goto bad;
 185             passargout = *(++argv);
 186         } else if (strcmp(*argv, "-non-fips-allow") == 0)
 187             non_fips_allow = 1;
 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     e = 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 # ifdef OPENSSL_NO_ENGINE
 274     rsa = RSA_new();
 275 # else
 276     rsa = RSA_new_method(e);
 277 # endif
 278     if (!rsa)
 279         goto err;
 280
 281     if (non_fips_allow)
 282         rsa->flags |= RSA_FLAG_NON_FIPS_ALLOW;
 283
 284     if (!BN_set_word(bn, f4) || !RSA_generate_key_ex(rsa, num, bn, cb))
 285         goto err;
 286
 287     app_RAND_write_file(NULL, bio_err);
 288
 289     hexe = BN_bn2hex(rsa->e);
 290     dece = BN_bn2dec(rsa->e);
 291     if (hexe && dece) {
 292         BIO_printf(bio_err, "e is %s (0x%s)\n", dece, hexe);
 293     }
 294     if (hexe)
 295         OPENSSL_free(hexe);
 296     if (dece)
 297         OPENSSL_free(dece);
 298     {
 299         PW_CB_DATA cb_data;
 300         cb_data.password = passout;
 301         cb_data.prompt_info = outfile;
 302         if (!PEM_write_bio_RSAPrivateKey(out, rsa, enc, NULL, 0,
 303                                          (pem_password_cb *)password_callback,
 304                                          &cb_data))
 305             goto err;
 306     }
 307
 308     ret = 0;
 309  err:
 310     if (bn)
 311         BN_free(bn);
 312     if (cb)
 313         BN_GENCB_free(cb);
 314     RSA_free(rsa);
 315     if (out)
 316         BIO_free_all(out);
 317     if (passout)
 318         OPENSSL_free(passout);
 319     if (ret != 0)
 320         ERR_print_errors(bio_err);
 321     apps_shutdown();
 322     OPENSSL_EXIT(ret);
 323 }
 324
 325 static int genrsa_cb(int p, int n, BN_GENCB *cb)
 326 {
 327     char c = '*';
 328
 329     if (p == 0)
 330         c = '.';
 331     if (p == 1)
 332         c = '+';
 333     if (p == 2)
 334         c = '*';
 335     if (p == 3)
 336         c = '\n';
 337     BIO_write(BN_GENCB_get_arg(cb), &c, 1);
 338     (void)BIO_flush(BN_GENCB_get_arg(cb));
 339     return 1;
 340 }
 341 #else                           /* !OPENSSL_NO_RSA */
 342
 343 # if PEDANTIC
 344 static void *dummy = &dummy;
 345 # endif
 346
 347 #endif