appl/test/gssapi_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 "gss_common.h"
  39 RCSID("$Id$");
  40
  41 static int
  42 process_it(int sock,
  43            gss_ctx_id_t context_hdl,
  44            gss_name_t client_name
  45            )
  46 {
  47     OM_uint32 maj_stat, min_stat;
  48     gss_buffer_desc real_input_token, real_output_token;
  49     gss_buffer_t input_token = &real_input_token,
  50         output_token = &real_output_token;
  51     gss_name_t server_name;
  52     int conf_flag;
  53
  54     print_gss_name("User is", client_name);
  55
  56     maj_stat = gss_inquire_context(&min_stat,
  57                                    context_hdl,
  58                                    NULL,
  59                                    &server_name,
  60                                    NULL,
  61                                    NULL,
  62                                    NULL,
  63                                    NULL,
  64                                    NULL);
  65     if (GSS_ERROR(maj_stat))
  66         gss_err (1, min_stat, "gss_inquire_context");
  67
  68     print_gss_name("Server is", server_name);
  69
  70     maj_stat = gss_release_name(&min_stat, &server_name);
  71     if (GSS_ERROR(maj_stat))
  72         gss_err (1, min_stat, "gss_release_name");
  73
  74     /* gss_verify_mic */
  75
  76     read_token (sock, input_token);
  77     read_token (sock, output_token);
  78
  79     maj_stat = gss_verify_mic (&min_stat,
  80                                context_hdl,
  81                                input_token,
  82                                output_token,
  83                                NULL);
  84     if (GSS_ERROR(maj_stat))
  85         gss_err (1, min_stat, "gss_verify_mic");
  86
  87     fprintf (stderr, "gss_verify_mic: %.*s\n", (int)input_token->length,
  88             (char *)input_token->value);
  89
  90     gss_release_buffer (&min_stat, input_token);
  91     gss_release_buffer (&min_stat, output_token);
  92
  93     /* gss_unwrap */
  94
  95     read_token (sock, input_token);
  96
  97     maj_stat = gss_unwrap (&min_stat,
  98                            context_hdl,
  99                            input_token,
 100                            output_token,
 101                            &conf_flag,
 102                            NULL);
 103     if(GSS_ERROR(maj_stat))
 104         gss_err (1, min_stat, "gss_unwrap");
 105
 106     fprintf (stderr, "gss_unwrap: %.*s %s\n", (int)output_token->length,
 107             (char *)output_token->value,
 108              conf_flag ? "CONF" : "INT");
 109
 110     gss_release_buffer (&min_stat, input_token);
 111     gss_release_buffer (&min_stat, output_token);
 112
 113     read_token (sock, input_token);
 114
 115     maj_stat = gss_unwrap (&min_stat,
 116                            context_hdl,
 117                            input_token,
 118                            output_token,
 119                            &conf_flag,
 120                            NULL);
 121     if(GSS_ERROR(maj_stat))
 122         gss_err (1, min_stat, "gss_unwrap");
 123
 124     fprintf (stderr, "gss_unwrap: %.*s %s\n", (int)output_token->length,
 125              (char *)output_token->value,
 126              conf_flag ? "CONF" : "INT");
 127
 128     gss_release_buffer (&min_stat, input_token);
 129     gss_release_buffer (&min_stat, output_token);
 130
 131     return 0;
 132 }
 133
 134 static int
 135 proto (int sock, const char *service)
 136 {
 137     struct sockaddr_in remote, local;
 138     socklen_t addrlen;
 139     gss_ctx_id_t context_hdl = GSS_C_NO_CONTEXT;
 140     gss_buffer_desc real_input_token, real_output_token;
 141     gss_buffer_t input_token = &real_input_token,
 142         output_token = &real_output_token;
 143     OM_uint32 maj_stat, min_stat;
 144     gss_name_t client_name;
 145     struct gss_channel_bindings_struct input_chan_bindings;
 146     gss_cred_id_t delegated_cred_handle = NULL;
 147     krb5_ccache ccache;
 148     u_char init_buf[4];
 149     u_char acct_buf[4];
 150     gss_OID mech_oid;
 151     char *mech, *p;
 152
 153     addrlen = sizeof(local);
 154     if (getsockname (sock, (struct sockaddr *)&local, &addrlen) < 0
 155         || addrlen != sizeof(local))
 156         err (1, "getsockname)");
 157
 158     addrlen = sizeof(remote);
 159     if (getpeername (sock, (struct sockaddr *)&remote, &addrlen) < 0
 160         || addrlen != sizeof(remote))
 161         err (1, "getpeername");
 162
 163     input_chan_bindings.initiator_addrtype = GSS_C_AF_INET;
 164     input_chan_bindings.initiator_address.length = 4;
 165     init_buf[0] = (remote.sin_addr.s_addr >> 24) & 0xFF;
 166     init_buf[1] = (remote.sin_addr.s_addr >> 16) & 0xFF;
 167     init_buf[2] = (remote.sin_addr.s_addr >>  8) & 0xFF;
 168     init_buf[3] = (remote.sin_addr.s_addr >>  0) & 0xFF;
 169
 170     input_chan_bindings.initiator_address.value = init_buf;
 171     input_chan_bindings.acceptor_addrtype = GSS_C_AF_INET;
 172
 173     input_chan_bindings.acceptor_address.length = 4;
 174     acct_buf[0] = (local.sin_addr.s_addr >> 24) & 0xFF;
 175     acct_buf[1] = (local.sin_addr.s_addr >> 16) & 0xFF;
 176     acct_buf[2] = (local.sin_addr.s_addr >>  8) & 0xFF;
 177     acct_buf[3] = (local.sin_addr.s_addr >>  0) & 0xFF;
 178     input_chan_bindings.acceptor_address.value = acct_buf;
 179     input_chan_bindings.application_data.value = emalloc(4);
 180 #if 0
 181     * (unsigned short *)input_chan_bindings.application_data.value =
 182                           remote.sin_port;
 183     * ((unsigned short *)input_chan_bindings.application_data.value + 1) =
 184                           local.sin_port;
 185     input_chan_bindings.application_data.length = 4;
 186 #else
 187     input_chan_bindings.application_data.length = 0;
 188     input_chan_bindings.application_data.value = NULL;
 189 #endif
 190
 191     delegated_cred_handle = GSS_C_NO_CREDENTIAL;
 192
 193     do {
 194         read_token (sock, input_token);
 195         maj_stat =
 196             gss_accept_sec_context (&min_stat,
 197                                     &context_hdl,
 198                                     GSS_C_NO_CREDENTIAL,
 199                                     input_token,
 200                                     &input_chan_bindings,
 201                                     &client_name,
 202                                     &mech_oid,
 203                                     output_token,
 204                                     NULL,
 205                                     NULL,
 206                                     &delegated_cred_handle);
 207         if(GSS_ERROR(maj_stat))
 208             gss_err (1, min_stat, "gss_accept_sec_context");
 209         if (output_token->length != 0)
 210             write_token (sock, output_token);
 211         if (GSS_ERROR(maj_stat)) {
 212             if (context_hdl != GSS_C_NO_CONTEXT)
 213                 gss_delete_sec_context (&min_stat,
 214                                         &context_hdl,
 215                                         GSS_C_NO_BUFFER);
 216             break;
 217         }
 218     } while(maj_stat & GSS_S_CONTINUE_NEEDED);
 219
 220     p = (char *)mech_oid->elements;
 221     if (mech_oid->length == GSS_KRB5_MECHANISM->length
 222         && memcmp(p, GSS_KRB5_MECHANISM->elements, mech_oid->length) == 0)
 223         mech = "Kerberos 5";
 224     else if (mech_oid->length == GSS_SPNEGO_MECHANISM->length
 225         && memcmp(p, GSS_SPNEGO_MECHANISM->elements, mech_oid->length) == 0)
 226         mech = "SPNEGO"; /* XXX Silly, wont show up */
 227     else
 228         mech = "Unknown";
 229
 230     printf("Using mech: %s\n", mech);
 231
 232     if (delegated_cred_handle != GSS_C_NO_CREDENTIAL) {
 233        krb5_context context;
 234
 235        printf("Delegated cred found\n");
 236
 237        maj_stat = krb5_init_context(&context);
 238        maj_stat = krb5_cc_resolve(context, "FILE:/tmp/krb5cc_test", &ccache);
 239        maj_stat = gss_krb5_copy_ccache(&min_stat,
 240                                        delegated_cred_handle,
 241                                        ccache);
 242        if (maj_stat == 0) {
 243            krb5_principal p;
 244            maj_stat = krb5_cc_get_principal(context, ccache, &p);
 245            if (maj_stat == 0) {
 246                char *name;
 247                maj_stat = krb5_unparse_name(context, p, &name);
 248                if (maj_stat == 0) {
 249                    printf("Delegated user is: `%s'\n", name);
 250                    free(name);
 251                }
 252                krb5_free_principal(context, p);
 253            }
 254        }
 255        krb5_cc_close(context, ccache);
 256        gss_release_cred(&min_stat, &delegated_cred_handle);
 257     }
 258
 259     if (fork_flag) {
 260         pid_t pid;
 261         int pipefd[2];
 262
 263         if (pipe (pipefd) < 0)
 264             err (1, "pipe");
 265
 266         pid = fork ();
 267         if (pid < 0)
 268             err (1, "fork");
 269         if (pid != 0) {
 270             gss_buffer_desc buf;
 271
 272             maj_stat = gss_export_sec_context (&min_stat,
 273                                                &context_hdl,
 274                                                &buf);
 275             if (GSS_ERROR(maj_stat))
 276                 gss_err (1, min_stat, "gss_export_sec_context");
 277             write_token (pipefd[1], &buf);
 278             exit (0);
 279         } else {
 280             gss_ctx_id_t context_hdl;
 281             gss_buffer_desc buf;
 282
 283             close (pipefd[1]);
 284             read_token (pipefd[0], &buf);
 285             close (pipefd[0]);
 286             maj_stat = gss_import_sec_context (&min_stat, &buf, &context_hdl);
 287             if (GSS_ERROR(maj_stat))
 288                 gss_err (1, min_stat, "gss_import_sec_context");
 289             gss_release_buffer (&min_stat, &buf);
 290             return process_it (sock, context_hdl, client_name);
 291         }
 292     } else {
 293         return process_it (sock, context_hdl, client_name);
 294     }
 295 }
 296
 297 static int
 298 doit (int port, const char *service)
 299 {
 300     int sock, sock2;
 301     struct sockaddr_in my_addr;
 302     int one = 1;
 303     int ret;
 304
 305     sock = socket (AF_INET, SOCK_STREAM, 0);
 306     if (sock < 0)
 307         err (1, "socket");
 308
 309     memset (&my_addr, 0, sizeof(my_addr));
 310     my_addr.sin_family      = AF_INET;
 311     my_addr.sin_port        = port;
 312     my_addr.sin_addr.s_addr = INADDR_ANY;
 313
 314     if (setsockopt (sock, SOL_SOCKET, SO_REUSEADDR,
 315                     (void *)&one, sizeof(one)) < 0)
 316         warn ("setsockopt SO_REUSEADDR");
 317
 318     if (bind (sock, (struct sockaddr *)&my_addr, sizeof(my_addr)) < 0)
 319         err (1, "bind");
 320
 321     while (1) {
 322         if (listen (sock, 1) < 0)
 323             err (1, "listen");
 324
 325         sock2 = accept (sock, NULL, NULL);
 326         if (sock2 < 0)
 327             err (1, "accept");
 328
 329         ret = proto (sock2, service);
 330     }
 331     return ret;
 332 }
 333
 334 int
 335 main(int argc, char **argv)
 336 {
 337     krb5_context context = NULL; /* XXX */
 338     int port = server_setup(&context, argc, argv);
 339     return doit (port, service);
 340 }
 341