appl/test/gssapi_client.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 "gss_common.h"
  37 RCSID("$Id$");
  38
  39 static int
  40 do_trans (int sock, gss_ctx_id_t context_hdl)
  41 {
  42     OM_uint32 maj_stat, min_stat;
  43     gss_buffer_desc real_input_token, real_output_token;
  44     gss_buffer_t input_token = &real_input_token,
  45         output_token = &real_output_token;
  46
  47     /* get_mic */
  48
  49     input_token->length = 3;
  50     input_token->value  = strdup("hej");
  51
  52     maj_stat = gss_get_mic(&min_stat,
  53                            context_hdl,
  54                            GSS_C_QOP_DEFAULT,
  55                            input_token,
  56                            output_token);
  57     if (GSS_ERROR(maj_stat))
  58         gss_err (1, min_stat, "gss_get_mic");
  59
  60     write_token (sock, input_token);
  61     write_token (sock, output_token);
  62
  63     /* wrap */
  64
  65     input_token->length = 7;
  66     input_token->value  = "hemligt";
  67
  68     maj_stat = gss_wrap (&min_stat,
  69                          context_hdl,
  70                          0,
  71                          GSS_C_QOP_DEFAULT,
  72                          input_token,
  73                          NULL,
  74                          output_token);
  75     if (GSS_ERROR(maj_stat))
  76         gss_err (1, min_stat, "gss_wrap");
  77
  78     write_token (sock, output_token);
  79
  80     maj_stat = gss_wrap (&min_stat,
  81                          context_hdl,
  82                          1,
  83                          GSS_C_QOP_DEFAULT,
  84                          input_token,
  85                          NULL,
  86                          output_token);
  87     if (GSS_ERROR(maj_stat))
  88         gss_err (1, min_stat, "gss_wrap");
  89
  90     write_token (sock, output_token);
  91
  92     return 0;
  93 }
  94
  95 static int
  96 proto (int sock, const char *hostname, const char *service)
  97 {
  98     struct sockaddr_in remote, local;
  99     socklen_t addrlen;
 100
 101     int context_established = 0;
 102     gss_ctx_id_t context_hdl = GSS_C_NO_CONTEXT;
 103     gss_buffer_desc real_input_token, real_output_token;
 104     gss_buffer_t input_token = &real_input_token,
 105         output_token = &real_output_token;
 106     OM_uint32 maj_stat, min_stat;
 107     gss_name_t server;
 108     gss_buffer_desc name_token;
 109     struct gss_channel_bindings_struct input_chan_bindings;
 110     u_char init_buf[4];
 111     u_char acct_buf[4];
 112     gss_OID mech_oid;
 113     char *str;
 114
 115     mech_oid = select_mech(mech);
 116
 117     name_token.length = asprintf (&str,
 118                                   "%s@%s", service, hostname);
 119     if (str == NULL)
 120         errx(1, "malloc - out of memory");
 121     name_token.value = str;
 122
 123     maj_stat = gss_import_name (&min_stat,
 124                                 &name_token,
 125                                 GSS_C_NT_HOSTBASED_SERVICE,
 126                                 &server);
 127     if (GSS_ERROR(maj_stat))
 128         gss_err (1, min_stat,
 129                  "Error importing name `%s@%s':\n", service, hostname);
 130
 131     addrlen = sizeof(local);
 132     if (getsockname (sock, (struct sockaddr *)&local, &addrlen) < 0
 133         || addrlen != sizeof(local))
 134         err (1, "getsockname(%s)", hostname);
 135
 136     addrlen = sizeof(remote);
 137     if (getpeername (sock, (struct sockaddr *)&remote, &addrlen) < 0
 138         || addrlen != sizeof(remote))
 139         err (1, "getpeername(%s)", hostname);
 140
 141     input_token->length = 0;
 142     output_token->length = 0;
 143
 144     input_chan_bindings.initiator_addrtype = GSS_C_AF_INET;
 145     input_chan_bindings.initiator_address.length = 4;
 146     init_buf[0] = (local.sin_addr.s_addr >> 24) & 0xFF;
 147     init_buf[1] = (local.sin_addr.s_addr >> 16) & 0xFF;
 148     init_buf[2] = (local.sin_addr.s_addr >>  8) & 0xFF;
 149     init_buf[3] = (local.sin_addr.s_addr >>  0) & 0xFF;
 150     input_chan_bindings.initiator_address.value = init_buf;
 151
 152     input_chan_bindings.acceptor_addrtype = GSS_C_AF_INET;
 153     input_chan_bindings.acceptor_address.length = 4;
 154     acct_buf[0] = (remote.sin_addr.s_addr >> 24) & 0xFF;
 155     acct_buf[1] = (remote.sin_addr.s_addr >> 16) & 0xFF;
 156     acct_buf[2] = (remote.sin_addr.s_addr >>  8) & 0xFF;
 157     acct_buf[3] = (remote.sin_addr.s_addr >>  0) & 0xFF;
 158     input_chan_bindings.acceptor_address.value = acct_buf;
 159
 160 #if 0
 161     input_chan_bindings.application_data.value = emalloc(4);
 162     * (unsigned short*)input_chan_bindings.application_data.value = local.sin_port;
 163     * ((unsigned short *)input_chan_bindings.application_data.value + 1) = remote.sin_port;
 164     input_chan_bindings.application_data.length = 4;
 165 #else
 166     input_chan_bindings.application_data.length = 0;
 167     input_chan_bindings.application_data.value = NULL;
 168 #endif
 169
 170     while(!context_established) {
 171         maj_stat =
 172             gss_init_sec_context(&min_stat,
 173                                  GSS_C_NO_CREDENTIAL,
 174                                  &context_hdl,
 175                                  server,
 176                                  mech_oid,
 177                                  GSS_C_MUTUAL_FLAG | GSS_C_SEQUENCE_FLAG
 178                                  | GSS_C_DELEG_FLAG,
 179                                  0,
 180                                  &input_chan_bindings,
 181                                  input_token,
 182                                  NULL,
 183                                  output_token,
 184                                  NULL,
 185                                  NULL);
 186         if (GSS_ERROR(maj_stat))
 187             gss_err (1, min_stat, "gss_init_sec_context");
 188         if (output_token->length != 0)
 189             write_token (sock, output_token);
 190         if (GSS_ERROR(maj_stat)) {
 191             if (context_hdl != GSS_C_NO_CONTEXT)
 192                 gss_delete_sec_context (&min_stat,
 193                                         &context_hdl,
 194                                         GSS_C_NO_BUFFER);
 195             break;
 196         }
 197         if (maj_stat & GSS_S_CONTINUE_NEEDED) {
 198             read_token (sock, input_token);
 199         } else {
 200             context_established = 1;
 201         }
 202
 203     }
 204     if (fork_flag) {
 205         pid_t pid;
 206         int pipefd[2];
 207
 208         if (pipe (pipefd) < 0)
 209             err (1, "pipe");
 210
 211         pid = fork ();
 212         if (pid < 0)
 213             err (1, "fork");
 214         if (pid != 0) {
 215             gss_buffer_desc buf;
 216
 217             maj_stat = gss_export_sec_context (&min_stat,
 218                                                &context_hdl,
 219                                                &buf);
 220             if (GSS_ERROR(maj_stat))
 221                 gss_err (1, min_stat, "gss_export_sec_context");
 222             write_token (pipefd[1], &buf);
 223             exit (0);
 224         } else {
 225             gss_ctx_id_t context_hdl;
 226             gss_buffer_desc buf;
 227
 228             close (pipefd[1]);
 229             read_token (pipefd[0], &buf);
 230             close (pipefd[0]);
 231             maj_stat = gss_import_sec_context (&min_stat, &buf, &context_hdl);
 232             if (GSS_ERROR(maj_stat))
 233                 gss_err (1, min_stat, "gss_import_sec_context");
 234             gss_release_buffer (&min_stat, &buf);
 235             return do_trans (sock, context_hdl);
 236         }
 237     } else {
 238         return do_trans (sock, context_hdl);
 239     }
 240 }
 241
 242 int
 243 main(int argc, char **argv)
 244 {
 245     krb5_context context; /* XXX */
 246     int port = client_setup(&context, &argc, argv);
 247     return client_doit (argv[argc], port, service, proto);
 248 }