/*
 * Copyright (c) 1997 - 2000, 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 "test_locl.h"
RCSID("$Id: uu_server.c 20880 2007-06-04 16:55:00Z lha $");

krb5_context context;

static int
proto (int sock, const char *service)
{
    struct sockaddr_in remote, local;
    socklen_t addrlen;
    krb5_address remote_addr, local_addr;
    krb5_ccache ccache;
    krb5_auth_context auth_context;
    krb5_error_code status;
    krb5_data packet;
    krb5_data data;
    krb5_data client_name;
    krb5_creds in_creds, *out_creds;

    addrlen = sizeof(local);
    if (getsockname (sock, (struct sockaddr *)&local, &addrlen) < 0
	|| addrlen != sizeof(local))
	err (1, "getsockname)");

    addrlen = sizeof(remote);
    if (getpeername (sock, (struct sockaddr *)&remote, &addrlen) < 0
	|| addrlen != sizeof(remote))
	err (1, "getpeername");

    status = krb5_auth_con_init (context, &auth_context);
    if (status)
	errx (1, "krb5_auth_con_init: %s",
	      krb5_get_err_text(context, status));

    local_addr.addr_type = AF_INET;
    local_addr.address.length = sizeof(local.sin_addr);
    local_addr.address.data   = &local.sin_addr;

    remote_addr.addr_type = AF_INET;
    remote_addr.address.length = sizeof(remote.sin_addr);
    remote_addr.address.data   = &remote.sin_addr;

    status = krb5_auth_con_setaddrs (context,
				     auth_context,
				     &local_addr,
				     &remote_addr);
    if (status)
	errx (1, "krb5_auth_con_setaddr: %s",
	      krb5_get_err_text(context, status));

    status = krb5_read_message(context, &sock, &client_name);
    if(status)
	krb5_err(context, 1, status, "krb5_read_message");
    
    memset(&in_creds, 0, sizeof(in_creds));
    status = krb5_cc_default(context, &ccache);
    status = krb5_cc_get_principal(context, ccache, &in_creds.client);

    status = krb5_read_message(context, &sock, &in_creds.second_ticket);
    if(status)
	krb5_err(context, 1, status, "krb5_read_message");

    status = krb5_parse_name(context, client_name.data, &in_creds.server);
    if(status)
	krb5_err(context, 1, status, "krb5_parse_name");
    
    status = krb5_get_credentials(context, KRB5_GC_USER_USER, ccache, 
				  &in_creds, &out_creds);
    if(status)
	krb5_err(context, 1, status, "krb5_get_credentials");

    status = krb5_cc_default(context, &ccache);

    status = krb5_sendauth(context, 
			   &auth_context,
			   &sock, 
			   VERSION, 
			   in_creds.client,
			   in_creds.server,
			   AP_OPTS_USE_SESSION_KEY,
			   NULL,
			   out_creds,
			   ccache,
			   NULL,
			   NULL,
			   NULL);
			   
    if (status)
	krb5_err(context, 1, status, "krb5_sendauth");
    
    {
	char *str;
	krb5_unparse_name(context, in_creds.server, &str);
	printf ("User is `%s'\n", str);
	free(str);
	krb5_unparse_name(context, in_creds.client, &str);
	printf ("Server is `%s'\n", str);
	free(str);
    }

    krb5_data_zero (&data);
    krb5_data_zero (&packet);

    status = krb5_read_message(context, &sock, &packet);
    if(status)
	krb5_err(context, 1, status, "krb5_read_message");
    
    status = krb5_rd_safe (context,
			   auth_context,
			   &packet,
			   &data,
			   NULL);
    if (status)
	errx (1, "krb5_rd_safe: %s",
	      krb5_get_err_text(context, status));

    printf ("safe packet: %.*s\n", (int)data.length,
	    (char *)data.data);

    status = krb5_read_message(context, &sock, &packet);
    if(status)
	krb5_err(context, 1, status, "krb5_read_message");
    
    status = krb5_rd_priv (context,
			   auth_context,
			   &packet,
			   &data,
			   NULL);
    if (status)
	errx (1, "krb5_rd_priv: %s",
	      krb5_get_err_text(context, status));

    printf ("priv packet: %.*s\n", (int)data.length,
	    (char *)data.data);

    return 0;
}

static int
doit (int port, const char *service)
{
    int sock, sock2;
    struct sockaddr_in my_addr;
    int one = 1;

    sock = socket (AF_INET, SOCK_STREAM, 0);
    if (sock < 0)
	err (1, "socket");

    memset (&my_addr, 0, sizeof(my_addr));
    my_addr.sin_family      = AF_INET;
    my_addr.sin_port        = port;
    my_addr.sin_addr.s_addr = INADDR_ANY;

    if (setsockopt (sock, SOL_SOCKET, SO_REUSEADDR, 
		    (void *)&one, sizeof(one)) < 0)
	warn ("setsockopt SO_REUSEADDR");

    if (bind (sock, (struct sockaddr *)&my_addr, sizeof(my_addr)) < 0)
	err (1, "bind");

    if (listen (sock, 1) < 0)
	err (1, "listen");

    sock2 = accept (sock, NULL, NULL);
    if (sock2 < 0)
	err (1, "accept");

    return proto (sock2, service);
}

int
main(int argc, char **argv)
{
    int port = server_setup(&context, argc, argv);
    return doit (port, service);
}
