pkeyparam.c

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/* apps/pkeyparam.c */
/* Written by Dr Stephen N Henson ([email protected]) for the OpenSSL
 * project 2006
 */
/* ====================================================================
 * Copyright (c) 2006 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
 *    [email protected].
 *
 * 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
 * ([email protected]).  This product includes software written by Tim
 * Hudson ([email protected]).
 *
 */
#include <stdio.h>
#include <string.h>
#include "apps.h"
#include <openssl/pem.h>
#include <openssl/err.h>
#include <openssl/evp.h>

#define PROG pkeyparam_main

int MAIN(int, char **);

int MAIN(int argc, char **argv)
    {
    char **args, *infile = NULL, *outfile = NULL;
    BIO *in = NULL, *out = NULL;
    int text = 0, noout = 0;
    EVP_PKEY *pkey=NULL;
    int badarg = 0;
#ifndef OPENSSL_NO_ENGINE
    char *engine=NULL;
#endif
    int ret = 1;

    if (bio_err == NULL)
        bio_err = BIO_new_fp (stderr, BIO_NOCLOSE);

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

    ERR_load_crypto_strings();
    OpenSSL_add_all_algorithms();
    args = argv + 1;
    while (!badarg && *args && *args[0] == '-')
        {
        if (!strcmp (*args, "-in"))
            {
            if (args[1])
                {
                args++;
                infile = *args;
                }
            else badarg = 1;
            }
        else if (!strcmp (*args, "-out"))
            {
            if (args[1])
                {
                args++;
                outfile = *args;
                }
            else badarg = 1;
            }
#ifndef OPENSSL_NO_ENGINE
        else if (strcmp(*args,"-engine") == 0)
            {
            if (!args[1]) goto bad;
            engine= *(++args);
            }
#endif

        else if (strcmp(*args,"-text") == 0)
            text=1;
        else if (strcmp(*args,"-noout") == 0)
            noout=1;
        args++;
        }

    if (badarg)
        {
#ifndef OPENSSL_NO_ENGINE
        bad:
#endif
        BIO_printf(bio_err, "Usage pkeyparam [options]\n");
        BIO_printf(bio_err, "where options are\n");
        BIO_printf(bio_err, "-in file        input file\n");
        BIO_printf(bio_err, "-out file       output file\n");
        BIO_printf(bio_err, "-text           print parameters as text\n");
        BIO_printf(bio_err, "-noout          don't output encoded parameters\n");
#ifndef OPENSSL_NO_ENGINE
        BIO_printf(bio_err, "-engine e       use engine e, possibly a hardware device.\n");
#endif
        return 1;
        }

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

    if (infile)
        {
        if (!(in = BIO_new_file (infile, "r")))
            {
            BIO_printf(bio_err,
                 "Can't open input file %s\n", infile);
            goto end;
            }
        }
    else
        in = BIO_new_fp (stdin, BIO_NOCLOSE);

    if (outfile)
        {
        if (!(out = BIO_new_file (outfile, "w")))
            {
            BIO_printf(bio_err,
                 "Can't open output file %s\n", outfile);
            goto end;
            }
        }
    else
        {
        out = BIO_new_fp (stdout, BIO_NOCLOSE);
#ifdef OPENSSL_SYS_VMS
            {
            BIO *tmpbio = BIO_new(BIO_f_linebuffer());
            out = BIO_push(tmpbio, out);
            }
#endif
        }

    pkey = PEM_read_bio_Parameters(in, NULL);
    if (!pkey)
        {
        BIO_printf(bio_err, "Error reading parameters\n");
        ERR_print_errors(bio_err);
        goto end;
        }

    if (!noout)
        PEM_write_bio_Parameters(out,pkey);

    if (text)
        EVP_PKEY_print_params(out, pkey, 0, NULL);

    ret = 0;

    end:
    EVP_PKEY_free(pkey);
    BIO_free_all(out);
    BIO_free(in);

    return ret;
    }