bin/openssl/gendsa.c

   1 /* $OpenBSD: gendsa.c,v 1.8 2017/01/20 08:57:12 deraadt Exp $ */
   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
  62 #include <sys/types.h>
  63 #include <sys/stat.h>
  64
  65 #include <stdio.h>
  66 #include <string.h>
  67
  68 #include "apps.h"
  69
  70 #include <openssl/bio.h>
  71 #include <openssl/bn.h>
  72 #include <openssl/dsa.h>
  73 #include <openssl/err.h>
  74 #include <openssl/pem.h>
  75 #include <openssl/x509.h>
  76
  77 int
  78 gendsa_main(int argc, char **argv)
  79 {
  80         DSA *dsa = NULL;
  81         int ret = 1;
  82         char *outfile = NULL;
  83         char *dsaparams = NULL;
  84         char *passargout = NULL, *passout = NULL;
  85         BIO *out = NULL, *in = NULL;
  86         const EVP_CIPHER *enc = NULL;
  87
  88         if (single_execution) {
  89                 if (pledge("stdio cpath wpath rpath tty", NULL) == -1) {
  90                         perror("pledge");
  91                         exit(1);
  92                 }
  93         }
  94
  95         argv++;
  96         argc--;
  97         for (;;) {
  98                 if (argc <= 0)
  99                         break;
 100                 if (strcmp(*argv, "-out") == 0) {
 101                         if (--argc < 1)
 102                                 goto bad;
 103                         outfile = *(++argv);
 104                 } else if (strcmp(*argv, "-passout") == 0) {
 105                         if (--argc < 1)
 106                                 goto bad;
 107                         passargout = *(++argv);
 108                 }
 109                 else if (strcmp(*argv, "-") == 0)
 110                         goto bad;
 111 #ifndef OPENSSL_NO_DES
 112                 else if (strcmp(*argv, "-des") == 0)
 113                         enc = EVP_des_cbc();
 114                 else if (strcmp(*argv, "-des3") == 0)
 115                         enc = EVP_des_ede3_cbc();
 116 #endif
 117 #ifndef OPENSSL_NO_IDEA
 118                 else if (strcmp(*argv, "-idea") == 0)
 119                         enc = EVP_idea_cbc();
 120 #endif
 121 #ifndef OPENSSL_NO_AES
 122                 else if (strcmp(*argv, "-aes128") == 0)
 123                         enc = EVP_aes_128_cbc();
 124                 else if (strcmp(*argv, "-aes192") == 0)
 125                         enc = EVP_aes_192_cbc();
 126                 else if (strcmp(*argv, "-aes256") == 0)
 127                         enc = EVP_aes_256_cbc();
 128 #endif
 129 #ifndef OPENSSL_NO_CAMELLIA
 130                 else if (strcmp(*argv, "-camellia128") == 0)
 131                         enc = EVP_camellia_128_cbc();
 132                 else if (strcmp(*argv, "-camellia192") == 0)
 133                         enc = EVP_camellia_192_cbc();
 134                 else if (strcmp(*argv, "-camellia256") == 0)
 135                         enc = EVP_camellia_256_cbc();
 136 #endif
 137                 else if (**argv != '-' && dsaparams == NULL) {
 138                         dsaparams = *argv;
 139                 } else
 140                         goto bad;
 141                 argv++;
 142                 argc--;
 143         }
 144
 145         if (dsaparams == NULL) {
 146 bad:
 147                 BIO_printf(bio_err, "usage: gendsa [args] dsaparam-file\n");
 148                 BIO_printf(bio_err, " -out file - output the key to 'file'\n");
 149 #ifndef OPENSSL_NO_DES
 150                 BIO_printf(bio_err, " -des      - encrypt the generated key with DES in cbc mode\n");
 151                 BIO_printf(bio_err, " -des3     - encrypt the generated key with DES in ede cbc mode (168 bit key)\n");
 152 #endif
 153 #ifndef OPENSSL_NO_IDEA
 154                 BIO_printf(bio_err, " -idea     - encrypt the generated key with IDEA in cbc mode\n");
 155 #endif
 156 #ifndef OPENSSL_NO_AES
 157                 BIO_printf(bio_err, " -aes128, -aes192, -aes256\n");
 158                 BIO_printf(bio_err, "                 encrypt PEM output with cbc aes\n");
 159 #endif
 160 #ifndef OPENSSL_NO_CAMELLIA
 161                 BIO_printf(bio_err, " -camellia128, -camellia192, -camellia256\n");
 162                 BIO_printf(bio_err, "                 encrypt PEM output with cbc camellia\n");
 163 #endif
 164                 BIO_printf(bio_err, " dsaparam-file\n");
 165                 BIO_printf(bio_err, "           - a DSA parameter file as generated by the dsaparam command\n");
 166                 goto end;
 167         }
 168         if (!app_passwd(bio_err, NULL, passargout, NULL, &passout)) {
 169                 BIO_printf(bio_err, "Error getting password\n");
 170                 goto end;
 171         }
 172         in = BIO_new(BIO_s_file());
 173         if (!(BIO_read_filename(in, dsaparams))) {
 174                 perror(dsaparams);
 175                 goto end;
 176         }
 177         if ((dsa = PEM_read_bio_DSAparams(in, NULL, NULL, NULL)) == NULL) {
 178                 BIO_printf(bio_err, "unable to load DSA parameter file\n");
 179                 goto end;
 180         }
 181         BIO_free(in);
 182         in = NULL;
 183
 184         out = BIO_new(BIO_s_file());
 185         if (out == NULL)
 186                 goto end;
 187
 188         if (outfile == NULL) {
 189                 BIO_set_fp(out, stdout, BIO_NOCLOSE);
 190         } else {
 191                 if (BIO_write_filename(out, outfile) <= 0) {
 192                         perror(outfile);
 193                         goto end;
 194                 }
 195         }
 196
 197         BIO_printf(bio_err, "Generating DSA key, %d bits\n",
 198             BN_num_bits(dsa->p));
 199         if (!DSA_generate_key(dsa))
 200                 goto end;
 201
 202         if (!PEM_write_bio_DSAPrivateKey(out, dsa, enc, NULL, 0, NULL, passout))
 203                 goto end;
 204         ret = 0;
 205 end:
 206         if (ret != 0)
 207                 ERR_print_errors(bio_err);
 208         BIO_free(in);
 209         if (out != NULL)
 210                 BIO_free_all(out);
 211         if (dsa != NULL)
 212                 DSA_free(dsa);
 213         free(passout);
 214
 215         return (ret);
 216 }