/* apps/sess_id.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * 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 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 acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS 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 AUTHOR OR 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.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/ssl.h>

#undef PROG
#define PROG    sess_id_main

static const char *sess_id_usage[] = {
    "usage: sess_id args\n",
    "\n",
    " -inform arg     - input format - default PEM (DER or PEM)\n",
    " -outform arg    - output format - default PEM (PEM, DER or NSS)\n",
    " -in arg         - input file - default stdin\n",
    " -out arg        - output file - default stdout\n",
    " -text           - print ssl session id details\n",
    " -cert           - output certificate \n",
    " -noout          - no output of encoded session info\n",
    " -context arg    - set the session ID context\n",
    NULL
};

static SSL_SESSION *load_sess_id(char *file, int format);

int MAIN(int, char **);

int MAIN(int argc, char **argv)
{
    SSL_SESSION *x = NULL;
    X509 *peer = NULL;
    int ret = 1, i, num, badops = 0;
    BIO *out = NULL;
    int informat, outformat;
    char *infile = NULL, *outfile = NULL, *context = NULL;
    int cert = 0, noout = 0, text = 0;
    const char **pp;

    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);

    informat = FORMAT_PEM;
    outformat = FORMAT_PEM;

    argc--;
    argv++;
    num = 0;
    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, "-text") == 0)
            text = ++num;
        else if (strcmp(*argv, "-cert") == 0)
            cert = ++num;
        else if (strcmp(*argv, "-noout") == 0)
            noout = ++num;
        else if (strcmp(*argv, "-context") == 0) {
            if (--argc < 1)
                goto bad;
            context = *++argv;
        } else {
            BIO_printf(bio_err, "unknown option %s\n", *argv);
            badops = 1;
            break;
        }
        argc--;
        argv++;
    }

    if (badops) {
 bad:
        for (pp = sess_id_usage; (*pp != NULL); pp++)
            BIO_printf(bio_err, "%s", *pp);
        goto end;
    }

    ERR_load_crypto_strings();
    x = load_sess_id(infile, informat);
    if (x == NULL) {
        goto end;
    }
    peer = SSL_SESSION_get0_peer(x);

    if (context) {
        size_t ctx_len = strlen(context);
        if (ctx_len > SSL_MAX_SID_CTX_LENGTH) {
            BIO_printf(bio_err, "Context too long\n");
            goto end;
        }
        SSL_SESSION_set1_id_context(x, (unsigned char *)context, ctx_len);
    }

    if (!noout || text) {
        out = BIO_new(BIO_s_file());
        if (out == NULL) {
            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;
            }
        }
    }

    if (text) {
        SSL_SESSION_print(out, x);

        if (cert) {
            if (peer == NULL)
                BIO_puts(out, "No certificate present\n");
            else
                X509_print(out, peer);
        }
    }

    if (!noout && !cert) {
        if (outformat == FORMAT_ASN1)
            i = i2d_SSL_SESSION_bio(out, x);
        else if (outformat == FORMAT_PEM)
            i = PEM_write_bio_SSL_SESSION(out, x);
        else if (outformat == FORMAT_NSS)
            i = SSL_SESSION_print_keylog(out, x);
        else {
            BIO_printf(bio_err, "bad output format specified for outfile\n");
            goto end;
        }
        if (!i) {
            BIO_printf(bio_err, "unable to write SSL_SESSION\n");
            goto end;
        }
    } else if (!noout && (peer != NULL)) { /* just print the certificate */
        if (outformat == FORMAT_ASN1)
            i = (int)i2d_X509_bio(out, peer);
        else if (outformat == FORMAT_PEM)
            i = PEM_write_bio_X509(out, peer);
        else {
            BIO_printf(bio_err, "bad output format specified for outfile\n");
            goto end;
        }
        if (!i) {
            BIO_printf(bio_err, "unable to write X509\n");
            goto end;
        }
    }
    ret = 0;
 end:
    if (out != NULL)
        BIO_free_all(out);
    if (x != NULL)
        SSL_SESSION_free(x);
    apps_shutdown();
    OPENSSL_EXIT(ret);
}

static SSL_SESSION *load_sess_id(char *infile, int format)
{
    SSL_SESSION *x = NULL;
    BIO *in = NULL;

    in = BIO_new(BIO_s_file());
    if (in == 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;
        }
    }
    if (format == FORMAT_ASN1)
        x = d2i_SSL_SESSION_bio(in, NULL);
    else if (format == FORMAT_PEM)
        x = PEM_read_bio_SSL_SESSION(in, NULL, NULL, NULL);
    else {
        BIO_printf(bio_err, "bad input format specified for input crl\n");
        goto end;
    }
    if (x == NULL) {
        BIO_printf(bio_err, "unable to load SSL_SESSION\n");
        ERR_print_errors(bio_err);
        goto end;
    }

 end:
    if (in != NULL)
        BIO_free(in);
    return (x);
}