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ec.c

/* apps/ec.c */
/*
 * Written by Nils Larsch for the OpenSSL project.
 */
/* ====================================================================
 * Copyright (c) 1998-2005 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <openssl/opensslconf.h>
#ifndef OPENSSL_NO_EC
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/pem.h>

#undef PROG
#define PROG      ec_main

/* -inform arg    - input format - default PEM (one of DER, NET or PEM)
 * -outform arg   - output format - default PEM
 * -in arg        - input file - default stdin
 * -out arg       - output file - default stdout
 * -des           - encrypt output if PEM format with DES in cbc mode
 * -text          - print a text version
 * -param_out     - print the elliptic curve parameters
 * -conv_form arg - specifies the point encoding form
 * -param_enc arg - specifies the parameter encoding
 */

int MAIN(int, char **);

int MAIN(int argc, char **argv)
{
#ifndef OPENSSL_NO_ENGINE
      ENGINE      *e = NULL;
#endif
      int   ret = 1;
      EC_KEY      *eckey = NULL;
      const EC_GROUP *group;
      int   i, badops = 0;
      const EVP_CIPHER *enc = NULL;
      BIO   *in = NULL, *out = NULL;
      int   informat, outformat, text=0, noout=0;
      int   pubin = 0, pubout = 0, param_out = 0;
      char  *infile, *outfile, *prog, *engine;
      char  *passargin = NULL, *passargout = NULL;
      char  *passin = NULL, *passout = NULL;
      point_conversion_form_t form = POINT_CONVERSION_UNCOMPRESSED;
      int   new_form = 0;
      int   asn1_flag = OPENSSL_EC_NAMED_CURVE;
      int   new_asn1_flag = 0;

      apps_startup();

      if (bio_err == NULL)
            if ((bio_err=BIO_new(BIO_s_file())) != NULL)
                  BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT);

      if (!load_config(bio_err, NULL))
            goto end;

      engine = NULL;
      infile = NULL;
      outfile = NULL;
      informat = FORMAT_PEM;
      outformat = FORMAT_PEM;

      prog = argv[0];
      argc--;
      argv++;
      while (argc >= 1)
            {
            if (strcmp(*argv,"-inform") == 0)
                  {
                  if (--argc < 1) goto bad;
                  informat=str2fmt(*(++argv));
                  }
            else if (strcmp(*argv,"-outform") == 0)
                  {
                  if (--argc < 1) goto bad;
                  outformat=str2fmt(*(++argv));
                  }
            else if (strcmp(*argv,"-in") == 0)
                  {
                  if (--argc < 1) goto bad;
                  infile= *(++argv);
                  }
            else if (strcmp(*argv,"-out") == 0)
                  {
                  if (--argc < 1) goto bad;
                  outfile= *(++argv);
                  }
            else if (strcmp(*argv,"-passin") == 0)
                  {
                  if (--argc < 1) goto bad;
                  passargin= *(++argv);
                  }
            else if (strcmp(*argv,"-passout") == 0)
                  {
                  if (--argc < 1) goto bad;
                  passargout= *(++argv);
                  }
            else if (strcmp(*argv, "-engine") == 0)
                  {
                  if (--argc < 1) goto bad;
                  engine= *(++argv);
                  }
            else if (strcmp(*argv, "-noout") == 0)
                  noout = 1;
            else if (strcmp(*argv, "-text") == 0)
                  text = 1;
            else if (strcmp(*argv, "-conv_form") == 0)
                  {
                  if (--argc < 1)
                        goto bad;
                  ++argv;
                  new_form = 1;
                  if (strcmp(*argv, "compressed") == 0)
                        form = POINT_CONVERSION_COMPRESSED;
                  else if (strcmp(*argv, "uncompressed") == 0)
                        form = POINT_CONVERSION_UNCOMPRESSED;
                  else if (strcmp(*argv, "hybrid") == 0)
                        form = POINT_CONVERSION_HYBRID;
                  else
                        goto bad;
                  }
            else if (strcmp(*argv, "-param_enc") == 0)
                  {
                  if (--argc < 1)
                        goto bad;
                  ++argv;
                  new_asn1_flag = 1;
                  if (strcmp(*argv, "named_curve") == 0)
                        asn1_flag = OPENSSL_EC_NAMED_CURVE;
                  else if (strcmp(*argv, "explicit") == 0)
                        asn1_flag = 0;
                  else
                        goto bad;
                  }
            else if (strcmp(*argv, "-param_out") == 0)
                  param_out = 1;
            else if (strcmp(*argv, "-pubin") == 0)
                  pubin=1;
            else if (strcmp(*argv, "-pubout") == 0)
                  pubout=1;
            else if ((enc=EVP_get_cipherbyname(&(argv[0][1]))) == NULL)
                  {
                  BIO_printf(bio_err, "unknown option %s\n", *argv);
                  badops=1;
                  break;
                  }
            argc--;
            argv++;
            }

      if (badops)
            {
bad:
            BIO_printf(bio_err, "%s [options] <infile >outfile\n", prog);
            BIO_printf(bio_err, "where options are\n");
            BIO_printf(bio_err, " -inform arg     input format - "
                        "DER or PEM\n");
            BIO_printf(bio_err, " -outform arg    output format - "
                        "DER or PEM\n");
            BIO_printf(bio_err, " -in arg         input file\n");
            BIO_printf(bio_err, " -passin arg     input file pass "
                        "phrase source\n");
            BIO_printf(bio_err, " -out arg        output file\n");
            BIO_printf(bio_err, " -passout arg    output file pass "
                        "phrase source\n");
            BIO_printf(bio_err, " -engine e       use engine e, "
                        "possibly a hardware device.\n");
            BIO_printf(bio_err, " -des            encrypt PEM output, "
                        "instead of 'des' every other \n"
                        "                 cipher "
                        "supported by OpenSSL can be used\n");
            BIO_printf(bio_err, " -text           print the key\n");
            BIO_printf(bio_err, " -noout          don't print key out\n");
            BIO_printf(bio_err, " -param_out      print the elliptic "
                        "curve parameters\n");
            BIO_printf(bio_err, " -conv_form arg  specifies the "
                        "point conversion form \n");
            BIO_printf(bio_err, "                 possible values:"
                        " compressed\n");
            BIO_printf(bio_err, "                                 "
                        " uncompressed (default)\n");
            BIO_printf(bio_err, "                                  "
                        " hybrid\n");
            BIO_printf(bio_err, " -param_enc arg  specifies the way"
                        " the ec parameters are encoded\n");
            BIO_printf(bio_err, "                 in the asn1 der "
                        "encoding\n");
            BIO_printf(bio_err, "                 possible values:"
                        " named_curve (default)\n");
            BIO_printf(bio_err,"                                  "
                        "explicit\n");
            goto end;
            }

      ERR_load_crypto_strings();

#ifndef OPENSSL_NO_ENGINE
        e = setup_engine(bio_err, engine, 0);
#endif

      if(!app_passwd(bio_err, passargin, passargout, &passin, &passout)) 
            {
            BIO_printf(bio_err, "Error getting passwords\n");
            goto end;
            }

      in = BIO_new(BIO_s_file());
      out = BIO_new(BIO_s_file());
      if ((in == NULL) || (out == NULL))
            {
            ERR_print_errors(bio_err);
            goto end;
            }

      if (infile == NULL)
            BIO_set_fp(in, stdin, BIO_NOCLOSE);
      else
            {
            if (BIO_read_filename(in, infile) <= 0)
                  {
                  perror(infile);
                  goto end;
                  }
            }

      BIO_printf(bio_err, "read EC key\n");
      if (informat == FORMAT_ASN1) 
            {
            if (pubin) 
                  eckey = d2i_EC_PUBKEY_bio(in, NULL);
            else 
                  eckey = d2i_ECPrivateKey_bio(in, NULL);
            } 
      else if (informat == FORMAT_PEM) 
            {
            if (pubin) 
                  eckey = PEM_read_bio_EC_PUBKEY(in, NULL, NULL, 
                        NULL);
            else 
                  eckey = PEM_read_bio_ECPrivateKey(in, NULL, NULL,
                        passin);
            } 
      else
            {
            BIO_printf(bio_err, "bad input format specified for key\n");
            goto end;
            }
      if (eckey == NULL)
            {
            BIO_printf(bio_err,"unable to load Key\n");
            ERR_print_errors(bio_err);
            goto end;
            }

      if (outfile == NULL)
            {
            BIO_set_fp(out, stdout, BIO_NOCLOSE);
#ifdef OPENSSL_SYS_VMS
                  {
                  BIO *tmpbio = BIO_new(BIO_f_linebuffer());
                  out = BIO_push(tmpbio, out);
                  }
#endif
            }
      else
            {
            if (BIO_write_filename(out, outfile) <= 0)
                  {
                  perror(outfile);
                  goto end;
                  }
            }

      group = EC_KEY_get0_group(eckey);

      if (new_form)
            EC_KEY_set_conv_form(eckey, form);

      if (new_asn1_flag)
            EC_KEY_set_asn1_flag(eckey, asn1_flag);

      if (text) 
            if (!EC_KEY_print(out, eckey, 0))
                  {
                  perror(outfile);
                  ERR_print_errors(bio_err);
                  goto end;
                  }

      if (noout) 
            {
            ret = 0;
            goto end;
            }

      BIO_printf(bio_err, "writing EC key\n");
      if (outformat == FORMAT_ASN1) 
            {
            if (param_out)
                  i = i2d_ECPKParameters_bio(out, group);
            else if (pubin || pubout) 
                  i = i2d_EC_PUBKEY_bio(out, eckey);
            else 
                  i = i2d_ECPrivateKey_bio(out, eckey);
            } 
      else if (outformat == FORMAT_PEM) 
            {
            if (param_out)
                  i = PEM_write_bio_ECPKParameters(out, group);
            else if (pubin || pubout)
                  i = PEM_write_bio_EC_PUBKEY(out, eckey);
            else 
                  i = PEM_write_bio_ECPrivateKey(out, eckey, enc,
                                    NULL, 0, NULL, passout);
            } 
      else 
            {
            BIO_printf(bio_err, "bad output format specified for "
                  "outfile\n");
            goto end;
            }

      if (!i)
            {
            BIO_printf(bio_err, "unable to write private key\n");
            ERR_print_errors(bio_err);
            }
      else
            ret=0;
end:
      if (in)
            BIO_free(in);
      if (out)
            BIO_free_all(out);
      if (eckey)
            EC_KEY_free(eckey);
      if (passin)
            OPENSSL_free(passin);
      if (passout)
            OPENSSL_free(passout);
      apps_shutdown();
      OPENSSL_EXIT(ret);
}
#endif

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