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/gssapi.h>
  36 #include <gssapi/gssapi_krb5.h>
  37 #include <gssapi/gssapi_spnego.h>
  38 #include <krb5.h>
  39 #include "nt_gss_common.h"
  40
  41 RCSID("$Id$");
  42
  43 /*
  44  * This program tries to act as a server for the sample in `Sample
  45  * SSPI Code' in Windows 2000 RC1 SDK.
  46  *
  47  * use --dump-auth to get a binary dump of the authorization data in the ticket
  48  */
  49
  50 static int help_flag;
  51 static int version_flag;
  52 static char *port_str;
  53 char *service = SERVICE;
  54 static char *auth_file;
  55
  56 static struct getargs args[] = {
  57     { "port", 'p', arg_string, &port_str, "port to listen to", "port" },
  58     { "service", 's', arg_string, &service, "service to use", "service" },
  59     { "dump-auth", 0, arg_string, &auth_file, "dump authorization data",
  60       "file" },
  61     { "help", 'h', arg_flag, &help_flag },
  62     { "version", 0, arg_flag, &version_flag }
  63 };
  64
  65 static int num_args = sizeof(args) / sizeof(args[0]);
  66
  67 static int
  68 proto (int sock, const char *service)
  69 {
  70     struct sockaddr_in remote, local;
  71     socklen_t addrlen;
  72     gss_ctx_id_t context_hdl = GSS_C_NO_CONTEXT;
  73     gss_buffer_t input_token, output_token;
  74     gss_buffer_desc real_input_token, real_output_token;
  75     OM_uint32 maj_stat, min_stat;
  76     gss_name_t client_name;
  77     gss_buffer_desc name_token;
  78
  79     addrlen = sizeof(local);
  80     if (getsockname (sock, (struct sockaddr *)&local, &addrlen) < 0
  81         || addrlen != sizeof(local))
  82         err (1, "getsockname)");
  83
  84     addrlen = sizeof(remote);
  85     if (getpeername (sock, (struct sockaddr *)&remote, &addrlen) < 0
  86         || addrlen != sizeof(remote))
  87         err (1, "getpeername");
  88
  89     input_token = &real_input_token;
  90     output_token = &real_output_token;
  91
  92     do {
  93         nt_read_token (sock, input_token);
  94         maj_stat =
  95             gss_accept_sec_context (&min_stat,
  96                                     &context_hdl,
  97                                     GSS_C_NO_CREDENTIAL,
  98                                     input_token,
  99                                     GSS_C_NO_CHANNEL_BINDINGS,
 100                                     &client_name,
 101                                     NULL,
 102                                     output_token,
 103                                     NULL,
 104                                     NULL,
 105                                     NULL);
 106         if(GSS_ERROR(maj_stat))
 107             gss_err (1, min_stat, "gss_accept_sec_context");
 108         if (output_token->length != 0)
 109             nt_write_token (sock, output_token);
 110         if (GSS_ERROR(maj_stat)) {
 111             if (context_hdl != GSS_C_NO_CONTEXT)
 112                 gss_delete_sec_context (&min_stat,
 113                                         &context_hdl,
 114                                         GSS_C_NO_BUFFER);
 115             break;
 116         }
 117     } while(maj_stat & GSS_S_CONTINUE_NEEDED);
 118
 119     if (auth_file != NULL) {
 120         gss_buffer_desc data;
 121
 122         maj_stat = gsskrb5_extract_authz_data_from_sec_context(&min_stat,
 123                                                                context_hdl,
 124                                                                KRB5_AUTHDATA_WIN2K_PAC,
 125                                                                &data);
 126         if (maj_stat == GSS_S_COMPLETE) {
 127             rk_dumpdata(auth_file, data.value, data.length);
 128             gss_release_buffer(&min_stat, &data);
 129         }
 130     }
 131
 132     maj_stat = gss_display_name (&min_stat,
 133                                  client_name,
 134                                  &name_token,
 135                                  NULL);
 136     if (GSS_ERROR(maj_stat))
 137         gss_err (1, min_stat, "gss_display_name");
 138
 139     fprintf (stderr, "User is `%.*s'\n", (int)name_token.length,
 140             (char *)name_token.value);
 141
 142     /* write something back */
 143
 144     output_token->value  = strdup ("hejsan");
 145     output_token->length = strlen (output_token->value) + 1;
 146     nt_write_token (sock, output_token);
 147
 148     output_token->value  = strdup ("hoppsan");
 149     output_token->length = strlen (output_token->value) + 1;
 150     nt_write_token (sock, output_token);
 151
 152     return 0;
 153 }
 154
 155 static int
 156 doit (int port, const char *service)
 157 {
 158     int sock, sock2;
 159     struct sockaddr_in my_addr;
 160     int one = 1;
 161
 162     sock = socket (AF_INET, SOCK_STREAM, 0);
 163     if (sock < 0)
 164         err (1, "socket");
 165
 166     memset (&my_addr, 0, sizeof(my_addr));
 167     my_addr.sin_family      = AF_INET;
 168     my_addr.sin_port        = port;
 169     my_addr.sin_addr.s_addr = INADDR_ANY;
 170
 171     if (setsockopt (sock, SOL_SOCKET, SO_REUSEADDR,
 172                     (void *)&one, sizeof(one)) < 0)
 173         warn ("setsockopt SO_REUSEADDR");
 174
 175     if (bind (sock, (struct sockaddr *)&my_addr, sizeof(my_addr)) < 0)
 176         err (1, "bind");
 177
 178     if (listen (sock, 1) < 0)
 179         err (1, "listen");
 180
 181     sock2 = accept (sock, NULL, NULL);
 182     if (sock2 < 0)
 183         err (1, "accept");
 184
 185     return proto (sock2, service);
 186 }
 187
 188 static void
 189 usage(int code, struct getargs *args, int num_args)
 190 {
 191     arg_printusage(args, num_args, NULL, "");
 192     exit(code);
 193 }
 194
 195 static int
 196 common_setup(krb5_context *context, int *argc, char **argv,
 197              void (*usage)(int, struct getargs*, int))
 198 {
 199     int port = 0;
 200     *argc = krb5_program_setup(context, *argc, argv, args, num_args, usage);
 201
 202     if(help_flag)
 203         (*usage)(0, args, num_args);
 204     if(version_flag) {
 205         print_version(NULL);
 206         exit(0);
 207     }
 208
 209     if(port_str){
 210         struct servent *s = roken_getservbyname(port_str, "tcp");
 211         if(s)
 212             port = s->s_port;
 213         else {
 214             char *ptr;
 215
 216             port = strtol (port_str, &ptr, 10);
 217             if (port == 0 && ptr == port_str)
 218                 errx (1, "Bad port `%s'", port_str);
 219             port = htons(port);
 220         }
 221     }
 222
 223     if (port == 0)
 224         port = krb5_getportbyname (*context, PORT, "tcp", 4711);
 225
 226     return port;
 227 }
 228
 229 static int
 230 setup(krb5_context *context, int argc, char **argv)
 231 {
 232     int port = common_setup(context, &argc, argv, usage);
 233     if(argv[argc] != NULL)
 234         usage(1, args, num_args);
 235     return port;
 236 }
 237
 238 int
 239 main(int argc, char **argv)
 240 {
 241     krb5_context context = NULL; /* XXX */
 242     int port = setup(&context, argc, argv);
 243     return doit (port, service);
 244 }