apps/dsa.c

   1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   4  * This package is an SSL implementation written
   5  * by Eric Young (eay@cryptsoft.com).
   6  * The implementation was written so as to conform with Netscapes SSL.
   7  *
   8  * This library is free for commercial and non-commercial use as long as
   9  * the following conditions are aheared to.  The following conditions
  10  * apply to all code found in this distribution, be it the RC4, RSA,
  11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  12  * included with this distribution is covered by the same copyright terms
  13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14  *
  15  * Copyright remains Eric Young's, and as such any Copyright notices in
  16  * the code are not to be removed.
  17  * If this package is used in a product, Eric Young should be given attribution
  18  * as the author of the parts of the library used.
  19  * This can be in the form of a textual message at program startup or
  20  * in documentation (online or textual) provided with the package.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. All advertising materials mentioning features or use of this software
  31  *    must display the following acknowledgement:
  32  *    "This product includes cryptographic software written by
  33  *     Eric Young (eay@cryptsoft.com)"
  34  *    The word 'cryptographic' can be left out if the rouines from the library
  35  *    being used are not cryptographic related :-).
  36  * 4. If you include any Windows specific code (or a derivative thereof) from
  37  *    the apps directory (application code) you must include an acknowledgement:
  38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  * The licence and distribution terms for any publically available version or
  53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  54  * copied and put under another distribution licence
  55  * [including the GNU Public Licence.]
  56  */
  57
  58 #include <openssl/opensslconf.h> /* for OPENSSL_NO_DSA */
  59 #ifndef OPENSSL_NO_DSA
  60 # include <stdio.h>
  61 # include <stdlib.h>
  62 # include <string.h>
  63 # include <time.h>
  64 # include "apps.h"
  65 # include <openssl/bio.h>
  66 # include <openssl/err.h>
  67 # include <openssl/dsa.h>
  68 # include <openssl/evp.h>
  69 # include <openssl/x509.h>
  70 # include <openssl/pem.h>
  71 # include <openssl/bn.h>
  72
  73 typedef enum OPTION_choice {
  74     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  75     OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT,
  76     OPT_ENGINE, OPT_PVK_STRONG, OPT_PVK_WEAK,
  77     OPT_PVK_NONE, OPT_NOOUT, OPT_TEXT, OPT_MODULUS, OPT_PUBIN,
  78     OPT_PUBOUT, OPT_CIPHER, OPT_PASSIN, OPT_PASSOUT
  79 } OPTION_CHOICE;
  80
  81 OPTIONS dsa_options[] = {
  82     {"help", OPT_HELP, '-', "Display this summary"},
  83     {"inform", OPT_INFORM, 'F', "Input format, DER PEM PVK"},
  84     {"outform", OPT_OUTFORM, 'F', "Output format, DER PEM PVK"},
  85 # ifndef OPENSSL_NO_ENGINE
  86     {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
  87 # endif
  88     {"in", OPT_IN, '<', "Input file"},
  89     {"out", OPT_OUT, '>', "Output file"},
  90     {"pvk-strong", OPT_PVK_STRONG, '-'},
  91     {"pvk-weak", OPT_PVK_WEAK, '-'},
  92     {"pvk-none", OPT_PVK_NONE, '-'},
  93     {"noout", OPT_NOOUT, '-', "Don't print key out"},
  94     {"text", OPT_TEXT, '-', "Print the key in text"},
  95     {"modulus", OPT_MODULUS, '-', "Print the DSA public value"},
  96     {"pubin", OPT_PUBIN, '-'},
  97     {"pubout", OPT_PUBOUT, '-'},
  98     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  99     {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
 100     {"", OPT_CIPHER, '-', "Any supported cipher"},
 101     {NULL}
 102 };
 103
 104 int dsa_main(int argc, char **argv)
 105 {
 106     BIO *out = NULL;
 107     DSA *dsa = NULL;
 108     ENGINE *e = NULL;
 109     const EVP_CIPHER *enc = NULL;
 110     char *infile = NULL, *outfile = NULL, *prog;
 111     char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
 112     OPTION_CHOICE o;
 113     int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, noout = 0;
 114     int i, modulus = 0, pubin = 0, pubout = 0, pvk_encr = 2, ret = 1;
 115
 116     prog = opt_init(argc, argv, dsa_options);
 117     while ((o = opt_next()) != OPT_EOF) {
 118         switch (o) {
 119         case OPT_EOF:
 120         case OPT_ERR:
 121 #ifdef OPENSSL_NO_RC4
 122         case OPT_PVK_STRONG:
 123         case OPT_PVK_WEAK:
 124         case OPT_PVK_NONE:
 125 #endif
 126  opthelp:
 127             ret = 0;
 128             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 129             goto end;
 130         case OPT_HELP:
 131             opt_help(dsa_options);
 132             ret = 0;
 133             goto end;
 134         case OPT_INFORM:
 135             if (!opt_format
 136                 (opt_arg(), OPT_FMT_PEMDER | OPT_FMT_PVK, &informat))
 137                 goto opthelp;
 138             break;
 139         case OPT_IN:
 140             infile = opt_arg();
 141             break;
 142         case OPT_OUTFORM:
 143             if (!opt_format
 144                 (opt_arg(), OPT_FMT_PEMDER | OPT_FMT_PVK, &outformat))
 145                 goto opthelp;
 146             break;
 147         case OPT_OUT:
 148             outfile = opt_arg();
 149             break;
 150         case OPT_ENGINE:
 151             e = setup_engine(opt_arg(), 0);
 152             break;
 153         case OPT_PASSIN:
 154             passinarg = opt_arg();
 155             break;
 156         case OPT_PASSOUT:
 157             passoutarg = opt_arg();
 158             break;
 159 #ifndef OPENSSL_NO_RC4
 160         case OPT_PVK_STRONG:
 161             pvk_encr = 2;
 162             break;
 163         case OPT_PVK_WEAK:
 164             pvk_encr = 1;
 165             break;
 166         case OPT_PVK_NONE:
 167             pvk_encr = 0;
 168             break;
 169 #endif
 170         case OPT_NOOUT:
 171             noout = 1;
 172             break;
 173         case OPT_TEXT:
 174             text = 1;
 175             break;
 176         case OPT_MODULUS:
 177             modulus = 1;
 178             break;
 179         case OPT_PUBIN:
 180             pubin = 1;
 181             break;
 182         case OPT_PUBOUT:
 183             pubout = 1;
 184             break;
 185         case OPT_CIPHER:
 186             if (!opt_cipher(opt_unknown(), &enc))
 187                 goto end;
 188             break;
 189         }
 190     }
 191     argc = opt_num_rest();
 192     argv = opt_rest();
 193
 194     if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
 195         BIO_printf(bio_err, "Error getting passwords\n");
 196         goto end;
 197     }
 198
 199     BIO_printf(bio_err, "read DSA key\n");
 200     {
 201         EVP_PKEY *pkey;
 202
 203         if (pubin)
 204             pkey = load_pubkey(infile, informat, 1, passin, e, "Public Key");
 205         else
 206             pkey = load_key(infile, informat, 1, passin, e, "Private Key");
 207
 208         if (pkey) {
 209             dsa = EVP_PKEY_get1_DSA(pkey);
 210             EVP_PKEY_free(pkey);
 211         }
 212     }
 213     if (dsa == NULL) {
 214         BIO_printf(bio_err, "unable to load Key\n");
 215         ERR_print_errors(bio_err);
 216         goto end;
 217     }
 218
 219     out = bio_open_default(outfile, "w");
 220     if (out == NULL)
 221         goto end;
 222
 223     if (text)
 224         if (!DSA_print(out, dsa, 0)) {
 225             perror(outfile);
 226             ERR_print_errors(bio_err);
 227             goto end;
 228         }
 229
 230     if (modulus) {
 231         BIO_printf(out, "Public Key=");
 232         BN_print(out, dsa->pub_key);
 233         BIO_printf(out, "\n");
 234     }
 235
 236     if (noout) {
 237         ret = 0;
 238         goto end;
 239     }
 240     BIO_printf(bio_err, "writing DSA key\n");
 241     if (outformat == FORMAT_ASN1) {
 242         if (pubin || pubout)
 243             i = i2d_DSA_PUBKEY_bio(out, dsa);
 244         else
 245             i = i2d_DSAPrivateKey_bio(out, dsa);
 246     } else if (outformat == FORMAT_PEM) {
 247         if (pubin || pubout)
 248             i = PEM_write_bio_DSA_PUBKEY(out, dsa);
 249         else
 250             i = PEM_write_bio_DSAPrivateKey(out, dsa, enc,
 251                                             NULL, 0, NULL, passout);
 252 # if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_RC4)
 253     } else if (outformat == FORMAT_MSBLOB || outformat == FORMAT_PVK) {
 254         EVP_PKEY *pk;
 255         pk = EVP_PKEY_new();
 256         EVP_PKEY_set1_DSA(pk, dsa);
 257         if (outformat == FORMAT_PVK)
 258             i = i2b_PVK_bio(out, pk, pvk_encr, 0, passout);
 259         else if (pubin || pubout)
 260             i = i2b_PublicKey_bio(out, pk);
 261         else
 262             i = i2b_PrivateKey_bio(out, pk);
 263         EVP_PKEY_free(pk);
 264 # endif
 265     } else {
 266         BIO_printf(bio_err, "bad output format specified for outfile\n");
 267         goto end;
 268     }
 269     if (i <= 0) {
 270         BIO_printf(bio_err, "unable to write private key\n");
 271         ERR_print_errors(bio_err);
 272         goto end;
 273     }
 274     ret = 0;
 275  end:
 276     BIO_free_all(out);
 277     DSA_free(dsa);
 278     if (passin)
 279         OPENSSL_free(passin);
 280     if (passout)
 281         OPENSSL_free(passout);
 282     return (ret);
 283 }
 284 #else                           /* !OPENSSL_NO_DSA */
 285
 286 # if PEDANTIC
 287 static void *dummy = &dummy;
 288 # endif
 289
 290 #endif