ec.c

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/* 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, "                 possilbe 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) 
                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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