appl/test/nt_gss_server.c

   1 /*
   2  * Copyright (c) 1997 - 2000 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "test_locl.h"
  35 #include <gssapi.h>
  36 #include <krb5.h>
  37 #include "nt_gss_common.h"
  38
  39 RCSID("$Id$");
  40
  41 /*
  42  * This program tries to act as a server for the sample in `Sample
  43  * SSPI Code' in Windows 2000 RC1 SDK.
  44  *
  45  * use --dump-auth to get a binary dump of the authorization data in the ticket
  46  */
  47
  48 static int help_flag;
  49 static int version_flag;
  50 static char *port_str;
  51 char *service = SERVICE;
  52 static char *auth_file;
  53
  54 static struct getargs args[] = {
  55     { "port", 'p', arg_string, &port_str, "port to listen to", "port" },
  56     { "service", 's', arg_string, &service, "service to use", "service" },
  57     { "dump-auth", 0, arg_string, &auth_file, "dump authorization data",
  58       "file" },
  59     { "help", 'h', arg_flag, &help_flag },
  60     { "version", 0, arg_flag, &version_flag }
  61 };
  62
  63 static int num_args = sizeof(args) / sizeof(args[0]);
  64
  65 static int
  66 proto (int sock, const char *service)
  67 {
  68     struct sockaddr_in remote, local;
  69     socklen_t addrlen;
  70     gss_ctx_id_t context_hdl = GSS_C_NO_CONTEXT;
  71     gss_buffer_t input_token, output_token;
  72     gss_buffer_desc real_input_token, real_output_token;
  73     OM_uint32 maj_stat, min_stat;
  74     gss_name_t client_name;
  75     gss_buffer_desc name_token;
  76
  77     addrlen = sizeof(local);
  78     if (getsockname (sock, (struct sockaddr *)&local, &addrlen) < 0
  79         || addrlen != sizeof(local))
  80         err (1, "getsockname)");
  81
  82     addrlen = sizeof(remote);
  83     if (getpeername (sock, (struct sockaddr *)&remote, &addrlen) < 0
  84         || addrlen != sizeof(remote))
  85         err (1, "getpeername");
  86
  87     input_token = &real_input_token;
  88     output_token = &real_output_token;
  89
  90     do {
  91         nt_read_token (sock, input_token);
  92         maj_stat =
  93             gss_accept_sec_context (&min_stat,
  94                                     &context_hdl,
  95                                     GSS_C_NO_CREDENTIAL,
  96                                     input_token,
  97                                     GSS_C_NO_CHANNEL_BINDINGS,
  98                                     &client_name,
  99                                     NULL,
 100                                     output_token,
 101                                     NULL,
 102                                     NULL,
 103                                     NULL);
 104         if(GSS_ERROR(maj_stat))
 105             gss_err (1, min_stat, "gss_accept_sec_context");
 106         if (output_token->length != 0)
 107             nt_write_token (sock, output_token);
 108         if (GSS_ERROR(maj_stat)) {
 109             if (context_hdl != GSS_C_NO_CONTEXT)
 110                 gss_delete_sec_context (&min_stat,
 111                                         &context_hdl,
 112                                         GSS_C_NO_BUFFER);
 113             break;
 114         }
 115     } while(maj_stat & GSS_S_CONTINUE_NEEDED);
 116
 117     if (auth_file != NULL) {
 118         int fd = open (auth_file, O_WRONLY | O_CREAT, 0666);
 119 #if 0
 120         krb5_ticket *ticket;
 121         krb5_data *data;
 122
 123         ticket = context_hdl->ticket;
 124         data = &ticket->ticket.authorization_data->val[0].ad_data;
 125
 126         if(fd < 0)
 127             err (1, "open %s", auth_file);
 128         if (write (fd, data->data, data->length) != data->length)
 129             errx (1, "write to %s failed", auth_file);
 130 #endif
 131         if (close (fd))
 132             err (1, "close %s", auth_file);
 133     }
 134
 135     maj_stat = gss_display_name (&min_stat,
 136                                  client_name,
 137                                  &name_token,
 138                                  NULL);
 139     if (GSS_ERROR(maj_stat))
 140         gss_err (1, min_stat, "gss_display_name");
 141
 142     fprintf (stderr, "User is `%.*s'\n", (int)name_token.length,
 143             (char *)name_token.value);
 144
 145     /* write something back */
 146
 147     output_token->value  = strdup ("hejsan");
 148     output_token->length = strlen (output_token->value) + 1;
 149     nt_write_token (sock, output_token);
 150
 151     output_token->value  = strdup ("hoppsan");
 152     output_token->length = strlen (output_token->value) + 1;
 153     nt_write_token (sock, output_token);
 154
 155     return 0;
 156 }
 157
 158 static int
 159 doit (int port, const char *service)
 160 {
 161     int sock, sock2;
 162     struct sockaddr_in my_addr;
 163     int one = 1;
 164
 165     sock = socket (AF_INET, SOCK_STREAM, 0);
 166     if (sock < 0)
 167         err (1, "socket");
 168
 169     memset (&my_addr, 0, sizeof(my_addr));
 170     my_addr.sin_family      = AF_INET;
 171     my_addr.sin_port        = port;
 172     my_addr.sin_addr.s_addr = INADDR_ANY;
 173
 174     if (setsockopt (sock, SOL_SOCKET, SO_REUSEADDR,
 175                     (void *)&one, sizeof(one)) < 0)
 176         warn ("setsockopt SO_REUSEADDR");
 177
 178     if (bind (sock, (struct sockaddr *)&my_addr, sizeof(my_addr)) < 0)
 179         err (1, "bind");
 180
 181     if (listen (sock, 1) < 0)
 182         err (1, "listen");
 183
 184     sock2 = accept (sock, NULL, NULL);
 185     if (sock2 < 0)
 186         err (1, "accept");
 187
 188     return proto (sock2, service);
 189 }
 190
 191 static void
 192 usage(int code, struct getargs *args, int num_args)
 193 {
 194     arg_printusage(args, num_args, NULL, "");
 195     exit(code);
 196 }
 197
 198 static int
 199 common_setup(krb5_context *context, int *argc, char **argv,
 200              void (*usage)(int, struct getargs*, int))
 201 {
 202     int port = 0;
 203     *argc = krb5_program_setup(context, *argc, argv, args, num_args, usage);
 204
 205     if(help_flag)
 206         (*usage)(0, args, num_args);
 207     if(version_flag) {
 208         print_version(NULL);
 209         exit(0);
 210     }
 211
 212     if(port_str){
 213         struct servent *s = roken_getservbyname(port_str, "tcp");
 214         if(s)
 215             port = s->s_port;
 216         else {
 217             char *ptr;
 218
 219             port = strtol (port_str, &ptr, 10);
 220             if (port == 0 && ptr == port_str)
 221                 errx (1, "Bad port `%s'", port_str);
 222             port = htons(port);
 223         }
 224     }
 225
 226     if (port == 0)
 227         port = krb5_getportbyname (*context, PORT, "tcp", 4711);
 228
 229     return port;
 230 }
 231
 232 static int
 233 setup(krb5_context *context, int argc, char **argv)
 234 {
 235     int port = common_setup(context, &argc, argv, usage);
 236     if(argv[argc] != NULL)
 237         usage(1, args, num_args);
 238     return port;
 239 }
 240
 241 int
 242 main(int argc, char **argv)
 243 {
 244     krb5_context context = NULL; /* XXX */
 245     int port = setup(&context, argc, argv);
 246     return doit (port, service);
 247 }