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>
  59 #ifdef OPENSSL_NO_DSA
  60 NON_EMPTY_TRANSLATION_UNIT
  61 #else
  62
  63 # include <stdio.h>
  64 # include <stdlib.h>
  65 # include <string.h>
  66 # include <time.h>
  67 # include "apps.h"
  68 # include <openssl/bio.h>
  69 # include <openssl/err.h>
  70 # include <openssl/dsa.h>
  71 # include <openssl/evp.h>
  72 # include <openssl/x509.h>
  73 # include <openssl/pem.h>
  74 # include <openssl/bn.h>
  75
  76 typedef enum OPTION_choice {
  77     OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
  78     OPT_INFORM, OPT_OUTFORM, OPT_IN, OPT_OUT,
  79     OPT_ENGINE, OPT_PVK_STRONG, OPT_PVK_WEAK,
  80     OPT_PVK_NONE, OPT_NOOUT, OPT_TEXT, OPT_MODULUS, OPT_PUBIN,
  81     OPT_PUBOUT, OPT_CIPHER, OPT_PASSIN, OPT_PASSOUT
  82 } OPTION_CHOICE;
  83
  84 OPTIONS dsa_options[] = {
  85     {"help", OPT_HELP, '-', "Display this summary"},
  86     {"inform", OPT_INFORM, 'F', "Input format, DER PEM PVK"},
  87     {"outform", OPT_OUTFORM, 'F', "Output format, DER PEM PVK"},
  88     {"in", OPT_IN, 's', "Input key"},
  89     {"out", OPT_OUT, '>', "Output file"},
  90     {"noout", OPT_NOOUT, '-', "Don't print key out"},
  91     {"text", OPT_TEXT, '-', "Print the key in text"},
  92     {"modulus", OPT_MODULUS, '-', "Print the DSA public value"},
  93     {"pubin", OPT_PUBIN, '-'},
  94     {"pubout", OPT_PUBOUT, '-'},
  95     {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
  96     {"passout", OPT_PASSOUT, 's', "Output file pass phrase source"},
  97     {"", OPT_CIPHER, '-', "Any supported cipher"},
  98 # ifndef OPENSSL_NO_RC4
  99     {"pvk-strong", OPT_PVK_STRONG, '-'},
 100     {"pvk-weak", OPT_PVK_WEAK, '-'},
 101     {"pvk-none", OPT_PVK_NONE, '-'},
 102 # endif
 103 # ifndef OPENSSL_NO_ENGINE
 104     {"engine", OPT_ENGINE, 's', "Use engine e, possibly a hardware device"},
 105 # endif
 106     {NULL}
 107 };
 108
 109 int dsa_main(int argc, char **argv)
 110 {
 111     BIO *out = NULL;
 112     DSA *dsa = NULL;
 113     ENGINE *e = NULL;
 114     const EVP_CIPHER *enc = NULL;
 115     char *infile = NULL, *outfile = NULL, *prog;
 116     char *passin = NULL, *passout = NULL, *passinarg = NULL, *passoutarg = NULL;
 117     OPTION_CHOICE o;
 118     int informat = FORMAT_PEM, outformat = FORMAT_PEM, text = 0, noout = 0;
 119     int i, modulus = 0, pubin = 0, pubout = 0, ret = 1;
 120 # ifndef OPENSSL_NO_RC4
 121     int pvk_encr = 2;
 122 # endif
 123     int private = 0;
 124
 125     prog = opt_init(argc, argv, dsa_options);
 126     while ((o = opt_next()) != OPT_EOF) {
 127         switch (o) {
 128         case OPT_EOF:
 129         case OPT_ERR:
 130  opthelp:
 131             ret = 0;
 132             BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
 133             goto end;
 134         case OPT_HELP:
 135             opt_help(dsa_options);
 136             ret = 0;
 137             goto end;
 138         case OPT_INFORM:
 139             if (!opt_format(opt_arg(), OPT_FMT_ANY, &informat))
 140                 goto opthelp;
 141             break;
 142         case OPT_IN:
 143             infile = opt_arg();
 144             break;
 145         case OPT_OUTFORM:
 146             if (!opt_format
 147                 (opt_arg(), OPT_FMT_PEMDER | OPT_FMT_PVK, &outformat))
 148                 goto opthelp;
 149             break;
 150         case OPT_OUT:
 151             outfile = opt_arg();
 152             break;
 153         case OPT_ENGINE:
 154             e = setup_engine(opt_arg(), 0);
 155             break;
 156         case OPT_PASSIN:
 157             passinarg = opt_arg();
 158             break;
 159         case OPT_PASSOUT:
 160             passoutarg = opt_arg();
 161             break;
 162 #ifndef OPENSSL_NO_RC4
 163         case OPT_PVK_STRONG:
 164             pvk_encr = 2;
 165             break;
 166         case OPT_PVK_WEAK:
 167             pvk_encr = 1;
 168             break;
 169         case OPT_PVK_NONE:
 170             pvk_encr = 0;
 171             break;
 172 #else
 173         case OPT_PVK_STRONG:
 174         case OPT_PVK_WEAK:
 175         case OPT_PVK_NONE:
 176             break;
 177 #endif
 178         case OPT_NOOUT:
 179             noout = 1;
 180             break;
 181         case OPT_TEXT:
 182             text = 1;
 183             break;
 184         case OPT_MODULUS:
 185             modulus = 1;
 186             break;
 187         case OPT_PUBIN:
 188             pubin = 1;
 189             break;
 190         case OPT_PUBOUT:
 191             pubout = 1;
 192             break;
 193         case OPT_CIPHER:
 194             if (!opt_cipher(opt_unknown(), &enc))
 195                 goto end;
 196             break;
 197         }
 198     }
 199     argc = opt_num_rest();
 200     if (argc != 0)
 201         goto opthelp;
 202
 203     private = pubin || pubout ? 0 : 1;
 204     if (text && !pubin)
 205         private = 1;
 206
 207     if (!app_passwd(passinarg, passoutarg, &passin, &passout)) {
 208         BIO_printf(bio_err, "Error getting passwords\n");
 209         goto end;
 210     }
 211
 212     BIO_printf(bio_err, "read DSA key\n");
 213     {
 214         EVP_PKEY *pkey;
 215
 216         if (pubin)
 217             pkey = load_pubkey(infile, informat, 1, passin, e, "Public Key");
 218         else
 219             pkey = load_key(infile, informat, 1, passin, e, "Private Key");
 220
 221         if (pkey) {
 222             dsa = EVP_PKEY_get1_DSA(pkey);
 223             EVP_PKEY_free(pkey);
 224         }
 225     }
 226     if (dsa == NULL) {
 227         BIO_printf(bio_err, "unable to load Key\n");
 228         ERR_print_errors(bio_err);
 229         goto end;
 230     }
 231
 232     out = bio_open_owner(outfile, outformat, private);
 233     if (out == NULL)
 234         goto end;
 235
 236     if (text) {
 237         assert(pubin || private);
 238         if (!DSA_print(out, dsa, 0)) {
 239             perror(outfile);
 240             ERR_print_errors(bio_err);
 241             goto end;
 242         }
 243     }
 244
 245     if (modulus) {
 246         BIO_printf(out, "Public Key=");
 247         BN_print(out, DSA_get0_pub_key(dsa));
 248         BIO_printf(out, "\n");
 249     }
 250
 251     if (noout) {
 252         ret = 0;
 253         goto end;
 254     }
 255     BIO_printf(bio_err, "writing DSA key\n");
 256     if (outformat == FORMAT_ASN1) {
 257         if (pubin || pubout)
 258             i = i2d_DSA_PUBKEY_bio(out, dsa);
 259         else {
 260             assert(private);
 261             i = i2d_DSAPrivateKey_bio(out, dsa);
 262         }
 263     } else if (outformat == FORMAT_PEM) {
 264         if (pubin || pubout)
 265             i = PEM_write_bio_DSA_PUBKEY(out, dsa);
 266         else {
 267             assert(private);
 268             i = PEM_write_bio_DSAPrivateKey(out, dsa, enc,
 269                                             NULL, 0, NULL, passout);
 270         }
 271 # if !defined(OPENSSL_NO_RSA) && !defined(OPENSSL_NO_RC4)
 272     } else if (outformat == FORMAT_MSBLOB || outformat == FORMAT_PVK) {
 273         EVP_PKEY *pk;
 274         pk = EVP_PKEY_new();
 275         EVP_PKEY_set1_DSA(pk, dsa);
 276         if (outformat == FORMAT_PVK) {
 277             if (pubin) {
 278                 BIO_printf(bio_err, "PVK form impossible with public key input\n");
 279                 EVP_PKEY_free(pk);
 280                 goto end;
 281             }
 282             assert(private);
 283             i = i2b_PVK_bio(out, pk, pvk_encr, 0, passout);
 284         }
 285         else if (pubin || pubout)
 286             i = i2b_PublicKey_bio(out, pk);
 287         else {
 288             assert(private);
 289             i = i2b_PrivateKey_bio(out, pk);
 290         }
 291         EVP_PKEY_free(pk);
 292 # endif
 293     } else {
 294         BIO_printf(bio_err, "bad output format specified for outfile\n");
 295         goto end;
 296     }
 297     if (i <= 0) {
 298         BIO_printf(bio_err, "unable to write private key\n");
 299         ERR_print_errors(bio_err);
 300         goto end;
 301     }
 302     ret = 0;
 303  end:
 304     BIO_free_all(out);
 305     DSA_free(dsa);
 306     OPENSSL_free(passin);
 307     OPENSSL_free(passout);
 308     return (ret);
 309 }
 310 #endif