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/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         NTSTATUS status;
  82
  83         struct MD5Context ctx;
  84         uint8_t sig[16];
  85         enum ndr_err_code ndr_err;
  86         bool ok;
  87         int rc;
  88
  89         machine_name = cli_credentials_get_workstation(credentials);
  90
  91         torture_comment(tctx, "Testing ServerReqChallenge\n");
  92
  93         r.in.server_name = NULL;
  94         r.in.computer_name = machine_name;
  95         r.in.credentials = &credentials1;
  96         r.out.return_credentials = &credentials2;
  97
  98         generate_random_buffer(credentials1.data, sizeof(credentials1.data));
  99
 100         status = dcerpc_netr_ServerReqChallenge(p, tctx, &r);
 101         torture_assert_ntstatus_ok(tctx, status, "ServerReqChallenge");
 102
 103         a.in.server_name = NULL;
 104         a.in.account_name = talloc_asprintf(tctx, "%s$", machine_name);
 105         a.in.secure_channel_type = SEC_CHAN_WKSTA;
 106         a.in.computer_name = machine_name;
 107         a.in.negotiate_flags = &negotiate_flags;
 108         a.in.credentials = &credentials3;
 109         a.out.return_credentials = &credentials3;
 110         a.out.negotiate_flags = &negotiate_flags;
 111         a.out.rid = &rid;
 112
 113         creds = netlogon_creds_client_init(tctx, a.in.account_name,
 114                                            a.in.computer_name,
 115                                            &credentials1, &credentials2,
 116                                            pwhash, &credentials3,
 117                                            negotiate_flags);
 118
 119         torture_assert(tctx, creds != NULL, "memory allocation");
 120
 121         torture_comment(tctx, "Testing ServerAuthenticate3\n");
 122
 123         status = dcerpc_netr_ServerAuthenticate3(p, tctx, &a);
 124         torture_assert_ntstatus_ok(tctx, status, "ServerAuthenticate3");
 125         torture_assert(tctx,
 126                        netlogon_creds_client_check(creds, &credentials3),
 127                        "Credential chaining failed");
 128
 129         sign_req.op = SIGN_TO_CLIENT;
 130         sign_req.packet_id = 1;
 131         sign_req.key_id = rid;
 132         sign_req.packet_to_sign = data_blob_string_const("I am a tea pot");
 133
 134         ndr_err = ndr_push_struct_blob(&sign_req_blob,
 135                                        mem_ctx,
 136                                        NULL,
 137                                        &sign_req,
 138                                        (ndr_push_flags_fn_t)ndr_push_sign_request);
 139         torture_assert(tctx,
 140                        NDR_ERR_CODE_IS_SUCCESS(ndr_err),
 141                        "Failed to push sign_req");
 142
 143         signd_client = talloc(mem_ctx, struct signd_client_state);
 144
 145         /* Create socket addresses */
 146         torture_comment(tctx, "Creating the socket addresses\n");
 147         rc = tsocket_address_unix_from_path(signd_client, "",
 148                                        &signd_client->local_address);
 149         torture_assert(tctx, rc == 0,
 150                        "Failed to create local address from unix path.");
 151
 152         unix_address = talloc_asprintf(signd_client,
 153                                         "%s/socket",
 154                                         lp_ntp_signd_socket_directory(tctx->lp_ctx));
 155         rc = tsocket_address_unix_from_path(mem_ctx,
 156                                             unix_address,
 157                                             &signd_client->remote_address);
 158         torture_assert(tctx, rc == 0,
 159                        "Failed to create remote address from unix path.");
 160
 161         /* Connect to the unix socket */
 162         torture_comment(tctx, "Connecting to the unix socket\n");
 163         req = tstream_unix_connect_send(signd_client,
 164                                         tctx->ev,
 165                                         signd_client->local_address,
 166                                         signd_client->remote_address);
 167         torture_assert(tctx, req != NULL,
 168                        "Failed to create a tstream unix connect request.");
 169
 170         ok = tevent_req_poll(req, tctx->ev);
 171         torture_assert(tctx, ok == true,
 172                        "Failed to poll for tstream_unix_connect_send.");
 173
 174         rc = tstream_unix_connect_recv(req,
 175                                        &sys_errno,
 176                                        signd_client,
 177                                        &signd_client->tstream);
 178         TALLOC_FREE(req);
 179         torture_assert(tctx, rc == 0, "Failed to connect to signd!");
 180
 181         /* Allocate the send queue */
 182         signd_client->send_queue = tevent_queue_create(signd_client,
 183                                                        "signd_client_queue");
 184         torture_assert(tctx, signd_client->send_queue != NULL,
 185                        "Failed to create send queue!");
 186
 187         /*
 188          * Create the request buffer.
 189          * First add the length of the request buffer
 190          */
 191         RSIVAL(signd_client->request_hdr, 0, sign_req_blob.length);
 192         signd_client->request_iov[0].iov_base = signd_client->request_hdr;
 193         signd_client->request_iov[0].iov_len = 4;
 194
 195         signd_client->request_iov[1].iov_base = sign_req_blob.data;
 196         signd_client->request_iov[1].iov_len = sign_req_blob.length;
 197
 198         /* Fire the request buffer */
 199         torture_comment(tctx, "Sending the request\n");
 200         req = tstream_writev_queue_send(signd_client,
 201                                         tctx->ev,
 202                                         signd_client->tstream,
 203                                         signd_client->send_queue,
 204                                         signd_client->request_iov, 2);
 205         torture_assert(tctx, req != NULL,
 206                        "Failed to send the signd request.");
 207
 208         ok = tevent_req_poll(req, tctx->ev);
 209         torture_assert(tctx, ok == true,
 210                        "Failed to poll for tstream_writev_queue_send.");
 211
 212         rc = tstream_writev_queue_recv(req, &sys_errno);
 213         TALLOC_FREE(req);
 214         torture_assert(tctx, rc > 0, "Failed to send data");
 215
 216         /* Wait for a reply */
 217         torture_comment(tctx, "Waiting for the reply\n");
 218         req = tstream_read_pdu_blob_send(signd_client,
 219                                          tctx->ev,
 220                                          signd_client->tstream,
 221                                          4, /*initial_read_size */
 222                                          packet_full_request_u32,
 223                                          NULL);
 224         torture_assert(tctx, req != NULL,
 225                        "Failed to setup a read for pdu_blob.");
 226
 227         ok = tevent_req_poll(req, tctx->ev);
 228         torture_assert(tctx, ok == true,
 229                        "Failed to poll for tstream_read_pdu_blob_send.");
 230
 231         signd_client->status = tstream_read_pdu_blob_recv(req,
 232                                                           signd_client,
 233                                                           &signd_client->reply);
 234         torture_assert_ntstatus_ok(tctx, signd_client->status,
 235                                    "Error reading signd_client reply packet");
 236
 237         /* Skip length header */
 238         signd_client->reply.data += 4;
 239         signd_client->reply.length -= 4;
 240
 241         /* Check if the reply buffer is valid */
 242         torture_comment(tctx, "Validating the reply buffer\n");
 243         ndr_err = ndr_pull_struct_blob_all(&signd_client->reply,
 244                                            mem_ctx,
 245                                            lp_iconv_convenience(tctx->lp_ctx),
 246                                            &signed_reply,
 247                                            (ndr_pull_flags_fn_t)ndr_pull_signed_reply);
 248         torture_assert(tctx, NDR_ERR_CODE_IS_SUCCESS(ndr_err),
 249                         ndr_map_error2string(ndr_err));
 250
 251         torture_assert_u64_equal(tctx, signed_reply.version,
 252                                  NTP_SIGND_PROTOCOL_VERSION_0,
 253                                  "Invalid Version");
 254         torture_assert_u64_equal(tctx, signed_reply.packet_id,
 255                                  sign_req.packet_id, "Invalid Packet ID");
 256         torture_assert_u64_equal(tctx, signed_reply.op,
 257                                  SIGNING_SUCCESS,
 258                                  "Should have replied with signing success");
 259         torture_assert_u64_equal(tctx, signed_reply.signed_packet.length,
 260                                  sign_req.packet_to_sign.length + 20,
 261                                  "Invalid reply length from signd");
 262         torture_assert_u64_equal(tctx, rid,
 263                                  IVAL(signed_reply.signed_packet.data,
 264                                  sign_req.packet_to_sign.length),
 265                                  "Incorrect RID in reply");
 266
 267         /* Check computed signature */
 268         MD5Init(&ctx);
 269         MD5Update(&ctx, pwhash->hash, sizeof(pwhash->hash));
 270         MD5Update(&ctx, sign_req.packet_to_sign.data,
 271                   sign_req.packet_to_sign.length);
 272         MD5Final(sig, &ctx);
 273
 274         torture_assert_mem_equal(tctx,
 275                                  &signed_reply.signed_packet.data[sign_req.packet_to_sign.length + 4],
 276                                  sig, 16, "Signature on reply was incorrect!");
 277
 278         talloc_free(mem_ctx);
 279
 280         return true;
 281 }
 282
 283 NTSTATUS torture_ntp_init(void)
 284 {
 285         struct torture_suite *suite = torture_suite_create(talloc_autofree_context(), "NTP");
 286         struct torture_rpc_tcase *tcase;
 287
 288         tcase = torture_suite_add_machine_workstation_rpc_iface_tcase(suite, "SIGND",
 289                                                                       &ndr_table_netlogon, TEST_MACHINE_NAME);
 290
 291         torture_rpc_tcase_add_test_creds(tcase, "ntp_signd", test_ntp_signd);
 292
 293         suite->description = talloc_strdup(suite, "NTP tests");
 294
 295         torture_register_suite(suite);
 296
 297         return NT_STATUS_OK;
 298 }
 299