spkac.c

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/* apps/spkac.c */

/* Written by Dr Stephen N Henson ([email protected]) for the OpenSSL
 * project 1999. Based on an original idea by Massimiliano Pala
 * ([email protected]).
 */
/* ====================================================================
 * Copyright (c) 1999 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 <stdlib.h>
#include <string.h>
#include <time.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/conf.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/lhash.h>
#include <openssl/x509.h>
#include <openssl/pem.h>

#undef PROG
#define PROG    spkac_main

/* -in arg  - input file - default stdin
 * -out arg - output file - default stdout
 */

int MAIN(int, char **);

int MAIN(int argc, char **argv)
    {
    ENGINE *e = NULL;
    int i,badops=0, ret = 1;
    BIO *in = NULL,*out = NULL;
    int verify=0,noout=0,pubkey=0;
    char *infile = NULL,*outfile = NULL,*prog;
    char *passargin = NULL, *passin = NULL;
    const char *spkac = "SPKAC", *spksect = "default";
    char *spkstr = NULL;
    char *challenge = NULL, *keyfile = NULL;
    CONF *conf = NULL;
    NETSCAPE_SPKI *spki = NULL;
    EVP_PKEY *pkey = NULL;
#ifndef OPENSSL_NO_ENGINE
    char *engine=NULL;
#endif

    apps_startup();

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

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

    prog=argv[0];
    argc--;
    argv++;
    while (argc >= 1)
        {
        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,"-key") == 0)
            {
            if (--argc < 1) goto bad;
            keyfile= *(++argv);
            }
        else if (strcmp(*argv,"-challenge") == 0)
            {
            if (--argc < 1) goto bad;
            challenge= *(++argv);
            }
        else if (strcmp(*argv,"-spkac") == 0)
            {
            if (--argc < 1) goto bad;
            spkac= *(++argv);
            }
        else if (strcmp(*argv,"-spksect") == 0)
            {
            if (--argc < 1) goto bad;
            spksect= *(++argv);
            }
#ifndef OPENSSL_NO_ENGINE
        else if (strcmp(*argv,"-engine") == 0)
            {
            if (--argc < 1) goto bad;
            engine= *(++argv);
            }
#endif
        else if (strcmp(*argv,"-noout") == 0)
            noout=1;
        else if (strcmp(*argv,"-pubkey") == 0)
            pubkey=1;
        else if (strcmp(*argv,"-verify") == 0)
            verify=1;
        else badops = 1;
        argc--;
        argv++;
        }

    if (badops)
        {
bad:
        BIO_printf(bio_err,"%s [options]\n",prog);
        BIO_printf(bio_err,"where options are\n");
        BIO_printf(bio_err," -in arg        input file\n");
        BIO_printf(bio_err," -out arg       output file\n");
        BIO_printf(bio_err," -key arg       create SPKAC using private key\n");
        BIO_printf(bio_err," -passin arg    input file pass phrase source\n");
        BIO_printf(bio_err," -challenge arg challenge string\n");
        BIO_printf(bio_err," -spkac arg     alternative SPKAC name\n");
        BIO_printf(bio_err," -noout         don't print SPKAC\n");
        BIO_printf(bio_err," -pubkey        output public key\n");
        BIO_printf(bio_err," -verify        verify SPKAC signature\n");
#ifndef OPENSSL_NO_ENGINE
        BIO_printf(bio_err," -engine e      use engine e, possibly a hardware device.\n");
#endif
        goto end;
        }

    ERR_load_crypto_strings();
    if(!app_passwd(bio_err, passargin, NULL, &passin, NULL)) {
        BIO_printf(bio_err, "Error getting password\n");
        goto end;
    }

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

    if(keyfile) {
        pkey = load_key(bio_err,
                strcmp(keyfile, "-") ? keyfile : NULL,
                FORMAT_PEM, 1, passin, e, "private key");
        if(!pkey) {
            goto end;
        }
        spki = NETSCAPE_SPKI_new();
        if(challenge) ASN1_STRING_set(spki->spkac->challenge,
                         challenge, (int)strlen(challenge));
        NETSCAPE_SPKI_set_pubkey(spki, pkey);
        NETSCAPE_SPKI_sign(spki, pkey, EVP_md5());
        spkstr = NETSCAPE_SPKI_b64_encode(spki);

        if (outfile) out = BIO_new_file(outfile, "w");
        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
        }

        if(!out) {
            BIO_printf(bio_err, "Error opening output file\n");
            ERR_print_errors(bio_err);
            goto end;
        }
        BIO_printf(out, "SPKAC=%s\n", spkstr);
        OPENSSL_free(spkstr);
        ret = 0;
        goto end;
    }

    

    if (infile) in = BIO_new_file(infile, "r");
    else in = BIO_new_fp(stdin, BIO_NOCLOSE);

    if(!in) {
        BIO_printf(bio_err, "Error opening input file\n");
        ERR_print_errors(bio_err);
        goto end;
    }

    conf = NCONF_new(NULL);
    i = NCONF_load_bio(conf, in, NULL);

    if(!i) {
        BIO_printf(bio_err, "Error parsing config file\n");
        ERR_print_errors(bio_err);
        goto end;
    }

    spkstr = NCONF_get_string(conf, spksect, spkac);
        
    if(!spkstr) {
        BIO_printf(bio_err, "Can't find SPKAC called \"%s\"\n", spkac);
        ERR_print_errors(bio_err);
        goto end;
    }

    spki = NETSCAPE_SPKI_b64_decode(spkstr, -1);
    
    if(!spki) {
        BIO_printf(bio_err, "Error loading SPKAC\n");
        ERR_print_errors(bio_err);
        goto end;
    }

    if (outfile) out = BIO_new_file(outfile, "w");
    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
    }

    if(!out) {
        BIO_printf(bio_err, "Error opening output file\n");
        ERR_print_errors(bio_err);
        goto end;
    }

    if(!noout) NETSCAPE_SPKI_print(out, spki);
    pkey = NETSCAPE_SPKI_get_pubkey(spki);
    if(verify) {
        i = NETSCAPE_SPKI_verify(spki, pkey);
        if (i > 0) BIO_printf(bio_err, "Signature OK\n");
        else {
            BIO_printf(bio_err, "Signature Failure\n");
            ERR_print_errors(bio_err);
            goto end;
        }
    }
    if(pubkey) PEM_write_bio_PUBKEY(out, pkey);

    ret = 0;

end:
    NCONF_free(conf);
    NETSCAPE_SPKI_free(spki);
    BIO_free(in);
    BIO_free_all(out);
    EVP_PKEY_free(pkey);
    if(passin) OPENSSL_free(passin);
    apps_shutdown();
    OPENSSL_EXIT(ret);
    }