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         MD5_CTX 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                                            a.in.secure_channel_type,
 117                                            &credentials1, &credentials2,
 118                                            pwhash, &credentials3,
 119                                            negotiate_flags);
 120
 121         torture_assert(tctx, creds != NULL, "memory allocation");
 122
 123         torture_comment(tctx, "Testing ServerAuthenticate3\n");
 124
 125         torture_assert_ntstatus_ok(tctx,
 126                 dcerpc_netr_ServerAuthenticate3_r(p->binding_handle, tctx, &a),
 127                 "ServerAuthenticate3 failed");
 128         torture_assert_ntstatus_ok(tctx, a.out.result,
 129                 "ServerAuthenticate3 failed");
 130         torture_assert(tctx,
 131                        netlogon_creds_client_check(creds, &credentials3),
 132                        "Credential chaining failed");
 133
 134         sign_req.op = SIGN_TO_CLIENT;
 135         sign_req.packet_id = 1;
 136         sign_req.key_id = rid;
 137         sign_req.packet_to_sign = data_blob_string_const("I am a tea pot");
 138
 139         ndr_err = ndr_push_struct_blob(&sign_req_blob,
 140                                        mem_ctx,
 141                                        &sign_req,
 142                                        (ndr_push_flags_fn_t)ndr_push_sign_request);
 143         torture_assert(tctx,
 144                        NDR_ERR_CODE_IS_SUCCESS(ndr_err),
 145                        "Failed to push sign_req");
 146
 147         signd_client = talloc(mem_ctx, struct signd_client_state);
 148
 149         /* Create socket addresses */
 150         torture_comment(tctx, "Creating the socket addresses\n");
 151         rc = tsocket_address_unix_from_path(signd_client, "",
 152                                        &signd_client->local_address);
 153         torture_assert(tctx, rc == 0,
 154                        "Failed to create local address from unix path.");
 155
 156         unix_address = talloc_asprintf(signd_client,
 157                                         "%s/socket",
 158                                         lpcfg_ntp_signd_socket_directory(tctx->lp_ctx));
 159         rc = tsocket_address_unix_from_path(mem_ctx,
 160                                             unix_address,
 161                                             &signd_client->remote_address);
 162         torture_assert(tctx, rc == 0,
 163                        "Failed to create remote address from unix path.");
 164
 165         /* Connect to the unix socket */
 166         torture_comment(tctx, "Connecting to the unix socket\n");
 167         req = tstream_unix_connect_send(signd_client,
 168                                         tctx->ev,
 169                                         signd_client->local_address,
 170                                         signd_client->remote_address);
 171         torture_assert(tctx, req != NULL,
 172                        "Failed to create a tstream unix connect request.");
 173
 174         ok = tevent_req_poll(req, tctx->ev);
 175         torture_assert(tctx, ok == true,
 176                        "Failed to poll for tstream_unix_connect_send.");
 177
 178         rc = tstream_unix_connect_recv(req,
 179                                        &sys_errno,
 180                                        signd_client,
 181                                        &signd_client->tstream);
 182         TALLOC_FREE(req);
 183         torture_assert(tctx, rc == 0, "Failed to connect to signd!");
 184
 185         /* Allocate the send queue */
 186         signd_client->send_queue = tevent_queue_create(signd_client,
 187                                                        "signd_client_queue");
 188         torture_assert(tctx, signd_client->send_queue != NULL,
 189                        "Failed to create send queue!");
 190
 191         /*
 192          * Create the request buffer.
 193          * First add the length of the request buffer
 194          */
 195         RSIVAL(signd_client->request_hdr, 0, sign_req_blob.length);
 196         signd_client->request_iov[0].iov_base = (char *) signd_client->request_hdr;
 197         signd_client->request_iov[0].iov_len = 4;
 198
 199         signd_client->request_iov[1].iov_base = (char *) sign_req_blob.data;
 200         signd_client->request_iov[1].iov_len = sign_req_blob.length;
 201
 202         /* Fire the request buffer */
 203         torture_comment(tctx, "Sending the request\n");
 204         req = tstream_writev_queue_send(signd_client,
 205                                         tctx->ev,
 206                                         signd_client->tstream,
 207                                         signd_client->send_queue,
 208                                         signd_client->request_iov, 2);
 209         torture_assert(tctx, req != NULL,
 210                        "Failed to send the signd request.");
 211
 212         ok = tevent_req_poll(req, tctx->ev);
 213         torture_assert(tctx, ok == true,
 214                        "Failed to poll for tstream_writev_queue_send.");
 215
 216         rc = tstream_writev_queue_recv(req, &sys_errno);
 217         TALLOC_FREE(req);
 218         torture_assert(tctx, rc > 0, "Failed to send data");
 219
 220         /* Wait for a reply */
 221         torture_comment(tctx, "Waiting for the reply\n");
 222         req = tstream_read_pdu_blob_send(signd_client,
 223                                          tctx->ev,
 224                                          signd_client->tstream,
 225                                          4, /*initial_read_size */
 226                                          packet_full_request_u32,
 227                                          NULL);
 228         torture_assert(tctx, req != NULL,
 229                        "Failed to setup a read for pdu_blob.");
 230
 231         ok = tevent_req_poll(req, tctx->ev);
 232         torture_assert(tctx, ok == true,
 233                        "Failed to poll for tstream_read_pdu_blob_send.");
 234
 235         signd_client->status = tstream_read_pdu_blob_recv(req,
 236                                                           signd_client,
 237                                                           &signd_client->reply);
 238         torture_assert_ntstatus_ok(tctx, signd_client->status,
 239                                    "Error reading signd_client reply packet");
 240
 241         /* Skip length header */
 242         signd_client->reply.data += 4;
 243         signd_client->reply.length -= 4;
 244
 245         /* Check if the reply buffer is valid */
 246         torture_comment(tctx, "Validating the reply buffer\n");
 247         ndr_err = ndr_pull_struct_blob_all(&signd_client->reply,
 248                                            mem_ctx,
 249                                            &signed_reply,
 250                                            (ndr_pull_flags_fn_t)ndr_pull_signed_reply);
 251         torture_assert(tctx, NDR_ERR_CODE_IS_SUCCESS(ndr_err),
 252                         ndr_map_error2string(ndr_err));
 253
 254         torture_assert_u64_equal(tctx, signed_reply.version,
 255                                  NTP_SIGND_PROTOCOL_VERSION_0,
 256                                  "Invalid Version");
 257         torture_assert_u64_equal(tctx, signed_reply.packet_id,
 258                                  sign_req.packet_id, "Invalid Packet ID");
 259         torture_assert_u64_equal(tctx, signed_reply.op,
 260                                  SIGNING_SUCCESS,
 261                                  "Should have replied with signing success");
 262         torture_assert_u64_equal(tctx, signed_reply.signed_packet.length,
 263                                  sign_req.packet_to_sign.length + 20,
 264                                  "Invalid reply length from signd");
 265         torture_assert_u64_equal(tctx, rid,
 266                                  IVAL(signed_reply.signed_packet.data,
 267                                  sign_req.packet_to_sign.length),
 268                                  "Incorrect RID in reply");
 269
 270         /* Check computed signature */
 271         MD5Init(&ctx);
 272         MD5Update(&ctx, pwhash->hash, sizeof(pwhash->hash));
 273         MD5Update(&ctx, sign_req.packet_to_sign.data,
 274                   sign_req.packet_to_sign.length);
 275         MD5Final(sig, &ctx);
 276
 277         torture_assert_mem_equal(tctx,
 278                                  &signed_reply.signed_packet.data[sign_req.packet_to_sign.length + 4],
 279                                  sig, 16, "Signature on reply was incorrect!");
 280
 281         talloc_free(mem_ctx);
 282
 283         return true;
 284 }
 285
 286 NTSTATUS torture_ntp_init(void)
 287 {
 288         struct torture_suite *suite = torture_suite_create(talloc_autofree_context(), "ntp");
 289         struct torture_rpc_tcase *tcase;
 290
 291         tcase = torture_suite_add_machine_workstation_rpc_iface_tcase(suite,
 292                                   "signd", &ndr_table_netlogon, TEST_MACHINE_NAME);
 293
 294         torture_rpc_tcase_add_test_creds(tcase, "ntp_signd", test_ntp_signd);
 295
 296         suite->description = talloc_strdup(suite, "NTP tests");
 297
 298         torture_register_suite(suite);
 299
 300         return NT_STATUS_OK;
 301 }
 302