source4/torture/ntp/ntp_signd.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Test NTP authentication support
   5
   6    Copyright (C) Andrew Bartlet <abartlet@samba.org> 2008
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "torture/smbtorture.h"
  24 #include <tevent.h>
  25 #include "lib/stream/packet.h"
  26 #include "lib/tsocket/tsocket.h"
  27 #include "libcli/util/tstream.h"
  28 #include "torture/rpc/torture_rpc.h"
  29 #include "../lib/crypto/crypto.h"
  30 #include "libcli/auth/libcli_auth.h"
  31 #include "librpc/gen_ndr/ndr_netlogon_c.h"
  32 #include "librpc/gen_ndr/ndr_ntp_signd.h"
  33 #include "param/param.h"
  34 #include "system/network.h"
  35
  36 #define TEST_MACHINE_NAME "ntpsigndtest"
  37
  38 struct signd_client_state {
  39         struct tsocket_address *local_address;
  40         struct tsocket_address *remote_address;
  41
  42         struct tstream_context *tstream;
  43         struct tevent_queue *send_queue;
  44
  45         uint8_t request_hdr[4];
  46         struct iovec request_iov[2];
  47
  48         DATA_BLOB reply;
  49
  50         NTSTATUS status;
  51 };
  52
  53 /*
  54  * A torture test to show that the unix domain socket protocol is
  55  * operating correctly, and the signatures are as expected
  56  */
  57 static bool test_ntp_signd(struct torture_context *tctx,
  58                            struct dcerpc_pipe *p,
  59                            struct cli_credentials *credentials)
  60 {
  61         struct netlogon_creds_CredentialState *creds;
  62         TALLOC_CTX *mem_ctx = talloc_new(tctx);
  63
  64         struct netr_ServerReqChallenge r;
  65         struct netr_ServerAuthenticate3 a;
  66         struct netr_Credential credentials1, credentials2, credentials3;
  67         uint32_t rid;
  68         const char *machine_name;
  69         const struct samr_Password *pwhash = cli_credentials_get_nt_hash(credentials, mem_ctx);
  70         uint32_t negotiate_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
  71
  72         struct sign_request sign_req;
  73         struct signed_reply signed_reply;
  74         DATA_BLOB sign_req_blob;
  75
  76         struct signd_client_state *signd_client;
  77         struct tevent_req *req;
  78         char *unix_address;
  79         int sys_errno;
  80
  81         struct MD5Context ctx;
  82         uint8_t sig[16];
  83         enum ndr_err_code ndr_err;
  84         bool ok;
  85         int rc;
  86
  87         machine_name = cli_credentials_get_workstation(credentials);
  88
  89         torture_comment(tctx, "Testing ServerReqChallenge\n");
  90
  91         r.in.server_name = NULL;
  92         r.in.computer_name = machine_name;
  93         r.in.credentials = &credentials1;
  94         r.out.return_credentials = &credentials2;
  95
  96         generate_random_buffer(credentials1.data, sizeof(credentials1.data));
  97
  98         torture_assert_ntstatus_ok(tctx,
  99                 dcerpc_netr_ServerReqChallenge_r(p->binding_handle, tctx, &r),
 100                 "ServerReqChallenge failed");
 101         torture_assert_ntstatus_ok(tctx, r.out.result,
 102                 "ServerReqChallenge failed");
 103
 104         a.in.server_name = NULL;
 105         a.in.account_name = talloc_asprintf(tctx, "%s$", machine_name);
 106         a.in.secure_channel_type = SEC_CHAN_WKSTA;
 107         a.in.computer_name = machine_name;
 108         a.in.negotiate_flags = &negotiate_flags;
 109         a.in.credentials = &credentials3;
 110         a.out.return_credentials = &credentials3;
 111         a.out.negotiate_flags = &negotiate_flags;
 112         a.out.rid = &rid;
 113
 114         creds = netlogon_creds_client_init(tctx, a.in.account_name,
 115                                            a.in.computer_name,
 116                                            &credentials1, &credentials2,
 117                                            pwhash, &credentials3,
 118                                            negotiate_flags);
 119
 120         torture_assert(tctx, creds != NULL, "memory allocation");
 121
 122         torture_comment(tctx, "Testing ServerAuthenticate3\n");
 123
 124         torture_assert_ntstatus_ok(tctx,
 125                 dcerpc_netr_ServerAuthenticate3_r(p->binding_handle, tctx, &a),
 126                 "ServerAuthenticate3 failed");
 127         torture_assert_ntstatus_ok(tctx, a.out.result,
 128                 "ServerAuthenticate3 failed");
 129         torture_assert(tctx,
 130                        netlogon_creds_client_check(creds, &credentials3),
 131                        "Credential chaining failed");
 132
 133         sign_req.op = SIGN_TO_CLIENT;
 134         sign_req.packet_id = 1;
 135         sign_req.key_id = rid;
 136         sign_req.packet_to_sign = data_blob_string_const("I am a tea pot");
 137
 138         ndr_err = ndr_push_struct_blob(&sign_req_blob,
 139                                        mem_ctx,
 140                                        &sign_req,
 141                                        (ndr_push_flags_fn_t)ndr_push_sign_request);
 142         torture_assert(tctx,
 143                        NDR_ERR_CODE_IS_SUCCESS(ndr_err),
 144                        "Failed to push sign_req");
 145
 146         signd_client = talloc(mem_ctx, struct signd_client_state);
 147
 148         /* Create socket addresses */
 149         torture_comment(tctx, "Creating the socket addresses\n");
 150         rc = tsocket_address_unix_from_path(signd_client, "",
 151                                        &signd_client->local_address);
 152         torture_assert(tctx, rc == 0,
 153                        "Failed to create local address from unix path.");
 154
 155         unix_address = talloc_asprintf(signd_client,
 156                                         "%s/socket",
 157                                         lpcfg_ntp_signd_socket_directory(tctx->lp_ctx));
 158         rc = tsocket_address_unix_from_path(mem_ctx,
 159                                             unix_address,
 160                                             &signd_client->remote_address);
 161         torture_assert(tctx, rc == 0,
 162                        "Failed to create remote address from unix path.");
 163
 164         /* Connect to the unix socket */
 165         torture_comment(tctx, "Connecting to the unix socket\n");
 166         req = tstream_unix_connect_send(signd_client,
 167                                         tctx->ev,
 168                                         signd_client->local_address,
 169                                         signd_client->remote_address);
 170         torture_assert(tctx, req != NULL,
 171                        "Failed to create a tstream unix connect request.");
 172
 173         ok = tevent_req_poll(req, tctx->ev);
 174         torture_assert(tctx, ok == true,
 175                        "Failed to poll for tstream_unix_connect_send.");
 176
 177         rc = tstream_unix_connect_recv(req,
 178                                        &sys_errno,
 179                                        signd_client,
 180                                        &signd_client->tstream);
 181         TALLOC_FREE(req);
 182         torture_assert(tctx, rc == 0, "Failed to connect to signd!");
 183
 184         /* Allocate the send queue */
 185         signd_client->send_queue = tevent_queue_create(signd_client,
 186                                                        "signd_client_queue");
 187         torture_assert(tctx, signd_client->send_queue != NULL,
 188                        "Failed to create send queue!");
 189
 190         /*
 191          * Create the request buffer.
 192          * First add the length of the request buffer
 193          */
 194         RSIVAL(signd_client->request_hdr, 0, sign_req_blob.length);
 195         signd_client->request_iov[0].iov_base = (char *) signd_client->request_hdr;
 196         signd_client->request_iov[0].iov_len = 4;
 197
 198         signd_client->request_iov[1].iov_base = (char *) sign_req_blob.data;
 199         signd_client->request_iov[1].iov_len = sign_req_blob.length;
 200
 201         /* Fire the request buffer */
 202         torture_comment(tctx, "Sending the request\n");
 203         req = tstream_writev_queue_send(signd_client,
 204                                         tctx->ev,
 205                                         signd_client->tstream,
 206                                         signd_client->send_queue,
 207                                         signd_client->request_iov, 2);
 208         torture_assert(tctx, req != NULL,
 209                        "Failed to send the signd request.");
 210
 211         ok = tevent_req_poll(req, tctx->ev);
 212         torture_assert(tctx, ok == true,
 213                        "Failed to poll for tstream_writev_queue_send.");
 214
 215         rc = tstream_writev_queue_recv(req, &sys_errno);
 216         TALLOC_FREE(req);
 217         torture_assert(tctx, rc > 0, "Failed to send data");
 218
 219         /* Wait for a reply */
 220         torture_comment(tctx, "Waiting for the reply\n");
 221         req = tstream_read_pdu_blob_send(signd_client,
 222                                          tctx->ev,
 223                                          signd_client->tstream,
 224                                          4, /*initial_read_size */
 225                                          packet_full_request_u32,
 226                                          NULL);
 227         torture_assert(tctx, req != NULL,
 228                        "Failed to setup a read for pdu_blob.");
 229
 230         ok = tevent_req_poll(req, tctx->ev);
 231         torture_assert(tctx, ok == true,
 232                        "Failed to poll for tstream_read_pdu_blob_send.");
 233
 234         signd_client->status = tstream_read_pdu_blob_recv(req,
 235                                                           signd_client,
 236                                                           &signd_client->reply);
 237         torture_assert_ntstatus_ok(tctx, signd_client->status,
 238                                    "Error reading signd_client reply packet");
 239
 240         /* Skip length header */
 241         signd_client->reply.data += 4;
 242         signd_client->reply.length -= 4;
 243
 244         /* Check if the reply buffer is valid */
 245         torture_comment(tctx, "Validating the reply buffer\n");
 246         ndr_err = ndr_pull_struct_blob_all(&signd_client->reply,
 247                                            mem_ctx,
 248                                            &signed_reply,
 249                                            (ndr_pull_flags_fn_t)ndr_pull_signed_reply);
 250         torture_assert(tctx, NDR_ERR_CODE_IS_SUCCESS(ndr_err),
 251                         ndr_map_error2string(ndr_err));
 252
 253         torture_assert_u64_equal(tctx, signed_reply.version,
 254                                  NTP_SIGND_PROTOCOL_VERSION_0,
 255                                  "Invalid Version");
 256         torture_assert_u64_equal(tctx, signed_reply.packet_id,
 257                                  sign_req.packet_id, "Invalid Packet ID");
 258         torture_assert_u64_equal(tctx, signed_reply.op,
 259                                  SIGNING_SUCCESS,
 260                                  "Should have replied with signing success");
 261         torture_assert_u64_equal(tctx, signed_reply.signed_packet.length,
 262                                  sign_req.packet_to_sign.length + 20,
 263                                  "Invalid reply length from signd");
 264         torture_assert_u64_equal(tctx, rid,
 265                                  IVAL(signed_reply.signed_packet.data,
 266                                  sign_req.packet_to_sign.length),
 267                                  "Incorrect RID in reply");
 268
 269         /* Check computed signature */
 270         MD5Init(&ctx);
 271         MD5Update(&ctx, pwhash->hash, sizeof(pwhash->hash));
 272         MD5Update(&ctx, sign_req.packet_to_sign.data,
 273                   sign_req.packet_to_sign.length);
 274         MD5Final(sig, &ctx);
 275
 276         torture_assert_mem_equal(tctx,
 277                                  &signed_reply.signed_packet.data[sign_req.packet_to_sign.length + 4],
 278                                  sig, 16, "Signature on reply was incorrect!");
 279
 280         talloc_free(mem_ctx);
 281
 282         return true;
 283 }
 284
 285 NTSTATUS torture_ntp_init(void)
 286 {
 287         struct torture_suite *suite = torture_suite_create(talloc_autofree_context(), "ntp");
 288         struct torture_rpc_tcase *tcase;
 289
 290         tcase = torture_suite_add_machine_workstation_rpc_iface_tcase(suite,
 291                                   "signd", &ndr_table_netlogon, TEST_MACHINE_NAME);
 292
 293         torture_rpc_tcase_add_test_creds(tcase, "ntp_signd", test_ntp_signd);
 294
 295         suite->description = talloc_strdup(suite, "NTP tests");
 296
 297         torture_register_suite(suite);
 298
 299         return NT_STATUS_OK;
 300 }
 301