/*
 * Copyright (c) 2007 Kungliga Tekniska Högskolan
 * (Royal Institute of Technology, Stockholm, Sweden).
 * 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. Neither the name of the Institute nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``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 INSTITUTE 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.
 */

#include "kdc_locl.h"

static int version_flag;
static int help_flag;

struct getargs args[] = {
    { "version",   0,   arg_flag, &version_flag },
    { "help",     'h',  arg_flag, &help_flag }
};

const static int num_args = sizeof(args) / sizeof(args[0]);

static void
usage(int ret)
{
    arg_printusage (args, num_args, NULL, "kdc-request-log-file");
    exit (ret);
}

int
main(int argc, char **argv)
{
    krb5_error_code ret;
    krb5_context context;
    krb5_kdc_configuration *config;
    krb5_storage *sp;
    int fd, optidx = 0;

    setprogname(argv[0]);

    if(getarg(args, num_args, argc, argv, &optidx))
        usage(1);

    if(help_flag)
        usage(0);

    if(version_flag){
        print_version(NULL);
        exit(0);
    }

    ret = krb5_init_context(&context);
    if (ret)
        errx (1, "krb5_init_context failed to parse configuration file");

    ret = krb5_kdc_get_config(context, &config);
    if (ret)
        krb5_err(context, 1, ret, "krb5_kdc_default_config");

    kdc_openlog(context, "kdc-replay", config);

    ret = krb5_kdc_set_dbinfo(context, config);
    if (ret)
        krb5_err(context, 1, ret, "krb5_kdc_set_dbinfo");

#ifdef PKINIT
    if (config->enable_pkinit) {
        if (config->pkinit_kdc_identity == NULL)
            krb5_errx(context, 1, "pkinit enabled but no identity");

        if (config->pkinit_kdc_anchors == NULL)
            krb5_errx(context, 1, "pkinit enabled but no X509 anchors");

        krb5_kdc_pk_initialize(context, config,
                               config->pkinit_kdc_identity,
                               config->pkinit_kdc_anchors,
                               config->pkinit_kdc_cert_pool,
                               config->pkinit_kdc_revoke);

    }
#endif /* PKINIT */

    if (argc != 2)
        errx(1, "argc != 2");

    printf("kdc replay\n");

    fd = open(argv[1], O_RDONLY);
    if (fd < 0)
        err(1, "open: %s", argv[1]);

    sp = krb5_storage_from_fd(fd);
    if (sp == NULL)
        krb5_errx(context, 1, "krb5_storage_from_fd");

    while(1) {
        struct sockaddr_storage sa;
        krb5_socklen_t salen = sizeof(sa);
        struct timeval tv;
        krb5_address a;
        krb5_data d, r;
        uint32_t t, clty, tag;
        char astr[80];

        ret = krb5_ret_uint32(sp, &t);
        if (ret == HEIM_ERR_EOF)
            break;
        else if (ret)
            krb5_errx(context, 1, "krb5_ret_uint32(version)");
        if (t != 1)
            krb5_errx(context, 1, "version not 1");
        ret = krb5_ret_uint32(sp, &t);
        if (ret)
            krb5_errx(context, 1, "krb5_ret_uint32(time)");
        ret = krb5_ret_address(sp, &a);
        if (ret)
            krb5_errx(context, 1, "krb5_ret_address");
        ret = krb5_ret_data(sp, &d);
        if (ret)
            krb5_errx(context, 1, "krb5_ret_data");
        ret = krb5_ret_uint32(sp, &clty);
        if (ret)
            krb5_errx(context, 1, "krb5_ret_uint32(class|type)");
        ret = krb5_ret_uint32(sp, &tag);
        if (ret)
            krb5_errx(context, 1, "krb5_ret_uint32(tag)");


        ret = krb5_addr2sockaddr (context, &a, (struct sockaddr *)&sa,
                                  &salen, 88);
        if (ret == KRB5_PROG_ATYPE_NOSUPP)
            goto out;
        else if (ret)
            krb5_err(context, 1, ret, "krb5_addr2sockaddr");

        ret = krb5_print_address(&a, astr, sizeof(astr), NULL);
        if (ret)
            krb5_err(context, 1, ret, "krb5_print_address");

        printf("processing request from %s, %lu bytes\n",
               astr, (unsigned long)d.length);

        r.length = 0;
        r.data = NULL;

        tv.tv_sec = t;
        tv.tv_usec = 0;

        krb5_kdc_update_time(&tv);
        krb5_set_real_time(context, tv.tv_sec, 0);

        ret = krb5_kdc_process_request(context, config, d.data, d.length,
                                       &r, NULL, astr,
                                       (struct sockaddr *)&sa, 0);
        if (ret)
            krb5_err(context, 1, ret, "krb5_kdc_process_request");

        if (r.length) {
            Der_class cl;
            Der_type ty;
            unsigned int tag2;
            ret = der_get_tag (r.data, r.length,
                               &cl, &ty, &tag2, NULL);
            if (ret)
                krb5_err(context, 1, ret, "Could not decode replay data");
            if (MAKE_TAG(cl, ty, 0) != clty)
                krb5_errx(context, 1, "class|type mismatch: %d != %d",
                          (int)MAKE_TAG(cl, ty, 0), (int)clty);
            if (tag != tag2)
                krb5_errx(context, 1, "tag mismatch");

            krb5_data_free(&r);
        } else {
            if (clty != 0xffffffff)
                krb5_errx(context, 1, "clty not invalid");
            if (tag != 0xffffffff)
                krb5_errx(context, 1, "tag not invalid");
        }

    out:
        krb5_data_free(&d);
        krb5_free_address(context, &a);
    }

    krb5_storage_free(sp);
    krb5_free_context(context);

    printf("done\n");

    return 0;
}