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 #include "torture/ntp/proto.h"
  36
  37 #define TEST_MACHINE_NAME "ntpsigndtest"
  38
  39 struct signd_client_state {
  40         struct tsocket_address *local_address;
  41         struct tsocket_address *remote_address;
  42
  43         struct tstream_context *tstream;
  44         struct tevent_queue *send_queue;
  45
  46         uint8_t request_hdr[4];
  47         struct iovec request_iov[2];
  48
  49         DATA_BLOB reply;
  50
  51         NTSTATUS status;
  52 };
  53
  54 /*
  55  * A torture test to show that the unix domain socket protocol is
  56  * operating correctly, and the signatures are as expected
  57  */
  58 static bool test_ntp_signd(struct torture_context *tctx,
  59                            struct dcerpc_pipe *p,
  60                            struct cli_credentials *credentials)
  61 {
  62         struct netlogon_creds_CredentialState *creds;
  63         TALLOC_CTX *mem_ctx = talloc_new(tctx);
  64
  65         struct netr_ServerReqChallenge r;
  66         struct netr_ServerAuthenticate3 a;
  67         struct netr_Credential credentials1, credentials2, credentials3;
  68         uint32_t rid;
  69         const char *machine_name;
  70         const struct samr_Password *pwhash = cli_credentials_get_nt_hash(credentials, mem_ctx);
  71         uint32_t negotiate_flags = NETLOGON_NEG_AUTH2_ADS_FLAGS;
  72
  73         struct sign_request sign_req;
  74         struct signed_reply signed_reply;
  75         DATA_BLOB sign_req_blob;
  76
  77         struct signd_client_state *signd_client;
  78         struct tevent_req *req;
  79         char *unix_address;
  80         int sys_errno;
  81
  82         MD5_CTX ctx;
  83         uint8_t sig[16];
  84         enum ndr_err_code ndr_err;
  85         bool ok;
  86         int rc;
  87
  88         machine_name = cli_credentials_get_workstation(credentials);
  89
  90         torture_comment(tctx, "Testing ServerReqChallenge\n");
  91
  92         r.in.server_name = NULL;
  93         r.in.computer_name = machine_name;
  94         r.in.credentials = &credentials1;
  95         r.out.return_credentials = &credentials2;
  96
  97         generate_random_buffer(credentials1.data, sizeof(credentials1.data));
  98
  99         torture_assert_ntstatus_ok(tctx,
 100                 dcerpc_netr_ServerReqChallenge_r(p->binding_handle, tctx, &r),
 101                 "ServerReqChallenge failed");
 102         torture_assert_ntstatus_ok(tctx, r.out.result,
 103                 "ServerReqChallenge failed");
 104
 105         a.in.server_name = NULL;
 106         a.in.account_name = talloc_asprintf(tctx, "%s$", machine_name);
 107         a.in.secure_channel_type = SEC_CHAN_WKSTA;
 108         a.in.computer_name = machine_name;
 109         a.in.negotiate_flags = &negotiate_flags;
 110         a.in.credentials = &credentials3;
 111         a.out.return_credentials = &credentials3;
 112         a.out.negotiate_flags = &negotiate_flags;
 113         a.out.rid = &rid;
 114
 115         creds = netlogon_creds_client_init(tctx, a.in.account_name,
 116                                            a.in.computer_name,
 117                                            a.in.secure_channel_type,
 118                                            &credentials1, &credentials2,
 119                                            pwhash, &credentials3,
 120                                            negotiate_flags);
 121
 122         torture_assert(tctx, creds != NULL, "memory allocation");
 123
 124         torture_comment(tctx, "Testing ServerAuthenticate3\n");
 125
 126         torture_assert_ntstatus_ok(tctx,
 127                 dcerpc_netr_ServerAuthenticate3_r(p->binding_handle, tctx, &a),
 128                 "ServerAuthenticate3 failed");
 129         torture_assert_ntstatus_ok(tctx, a.out.result,
 130                 "ServerAuthenticate3 failed");
 131         torture_assert(tctx,
 132                        netlogon_creds_client_check(creds, &credentials3),
 133                        "Credential chaining failed");
 134
 135         sign_req.op = SIGN_TO_CLIENT;
 136         sign_req.packet_id = 1;
 137         sign_req.key_id = rid;
 138         sign_req.packet_to_sign = data_blob_string_const("I am a tea pot");
 139
 140         ndr_err = ndr_push_struct_blob(&sign_req_blob,
 141                                        mem_ctx,
 142                                        &sign_req,
 143                                        (ndr_push_flags_fn_t)ndr_push_sign_request);
 144         torture_assert(tctx,
 145                        NDR_ERR_CODE_IS_SUCCESS(ndr_err),
 146                        "Failed to push sign_req");
 147
 148         signd_client = talloc(mem_ctx, struct signd_client_state);
 149
 150         /* Create socket addresses */
 151         torture_comment(tctx, "Creating the socket addresses\n");
 152         rc = tsocket_address_unix_from_path(signd_client, "",
 153                                        &signd_client->local_address);
 154         torture_assert(tctx, rc == 0,
 155                        "Failed to create local address from unix path.");
 156
 157         unix_address = talloc_asprintf(signd_client,
 158                                         "%s/socket",
 159                                         lpcfg_ntp_signd_socket_directory(tctx->lp_ctx));
 160         rc = tsocket_address_unix_from_path(mem_ctx,
 161                                             unix_address,
 162                                             &signd_client->remote_address);
 163         torture_assert(tctx, rc == 0,
 164                        "Failed to create remote address from unix path.");
 165
 166         /* Connect to the unix socket */
 167         torture_comment(tctx, "Connecting to the unix socket\n");
 168         req = tstream_unix_connect_send(signd_client,
 169                                         tctx->ev,
 170                                         signd_client->local_address,
 171                                         signd_client->remote_address);
 172         torture_assert(tctx, req != NULL,
 173                        "Failed to create a tstream unix connect request.");
 174
 175         ok = tevent_req_poll(req, tctx->ev);
 176         torture_assert(tctx, ok == true,
 177                        "Failed to poll for tstream_unix_connect_send.");
 178
 179         rc = tstream_unix_connect_recv(req,
 180                                        &sys_errno,
 181                                        signd_client,
 182                                        &signd_client->tstream);
 183         TALLOC_FREE(req);
 184         torture_assert(tctx, rc == 0, "Failed to connect to signd!");
 185
 186         /* Allocate the send queue */
 187         signd_client->send_queue = tevent_queue_create(signd_client,
 188                                                        "signd_client_queue");
 189         torture_assert(tctx, signd_client->send_queue != NULL,
 190                        "Failed to create send queue!");
 191
 192         /*
 193          * Create the request buffer.
 194          * First add the length of the request buffer
 195          */
 196         RSIVAL(signd_client->request_hdr, 0, sign_req_blob.length);
 197         signd_client->request_iov[0].iov_base = (char *) signd_client->request_hdr;
 198         signd_client->request_iov[0].iov_len = 4;
 199
 200         signd_client->request_iov[1].iov_base = (char *) sign_req_blob.data;
 201         signd_client->request_iov[1].iov_len = sign_req_blob.length;
 202
 203         /* Fire the request buffer */
 204         torture_comment(tctx, "Sending the request\n");
 205         req = tstream_writev_queue_send(signd_client,
 206                                         tctx->ev,
 207                                         signd_client->tstream,
 208                                         signd_client->send_queue,
 209                                         signd_client->request_iov, 2);
 210         torture_assert(tctx, req != NULL,
 211                        "Failed to send the signd request.");
 212
 213         ok = tevent_req_poll(req, tctx->ev);
 214         torture_assert(tctx, ok == true,
 215                        "Failed to poll for tstream_writev_queue_send.");
 216
 217         rc = tstream_writev_queue_recv(req, &sys_errno);
 218         TALLOC_FREE(req);
 219         torture_assert(tctx, rc > 0, "Failed to send data");
 220
 221         /* Wait for a reply */
 222         torture_comment(tctx, "Waiting for the reply\n");
 223         req = tstream_read_pdu_blob_send(signd_client,
 224                                          tctx->ev,
 225                                          signd_client->tstream,
 226                                          4, /*initial_read_size */
 227                                          packet_full_request_u32,
 228                                          NULL);
 229         torture_assert(tctx, req != NULL,
 230                        "Failed to setup a read for pdu_blob.");
 231
 232         ok = tevent_req_poll(req, tctx->ev);
 233         torture_assert(tctx, ok == true,
 234                        "Failed to poll for tstream_read_pdu_blob_send.");
 235
 236         signd_client->status = tstream_read_pdu_blob_recv(req,
 237                                                           signd_client,
 238                                                           &signd_client->reply);
 239         torture_assert_ntstatus_ok(tctx, signd_client->status,
 240                                    "Error reading signd_client reply packet");
 241
 242         /* Skip length header */
 243         signd_client->reply.data += 4;
 244         signd_client->reply.length -= 4;
 245
 246         /* Check if the reply buffer is valid */
 247         torture_comment(tctx, "Validating the reply buffer\n");
 248         ndr_err = ndr_pull_struct_blob_all(&signd_client->reply,
 249                                            mem_ctx,
 250                                            &signed_reply,
 251                                            (ndr_pull_flags_fn_t)ndr_pull_signed_reply);
 252         torture_assert(tctx, NDR_ERR_CODE_IS_SUCCESS(ndr_err),
 253                         ndr_map_error2string(ndr_err));
 254
 255         torture_assert_u64_equal(tctx, signed_reply.version,
 256                                  NTP_SIGND_PROTOCOL_VERSION_0,
 257                                  "Invalid Version");
 258         torture_assert_u64_equal(tctx, signed_reply.packet_id,
 259                                  sign_req.packet_id, "Invalid Packet ID");
 260         torture_assert_u64_equal(tctx, signed_reply.op,
 261                                  SIGNING_SUCCESS,
 262                                  "Should have replied with signing success");
 263         torture_assert_u64_equal(tctx, signed_reply.signed_packet.length,
 264                                  sign_req.packet_to_sign.length + 20,
 265                                  "Invalid reply length from signd");
 266         torture_assert_u64_equal(tctx, rid,
 267                                  IVAL(signed_reply.signed_packet.data,
 268                                  sign_req.packet_to_sign.length),
 269                                  "Incorrect RID in reply");
 270
 271         /* Check computed signature */
 272         MD5Init(&ctx);
 273         MD5Update(&ctx, pwhash->hash, sizeof(pwhash->hash));
 274         MD5Update(&ctx, sign_req.packet_to_sign.data,
 275                   sign_req.packet_to_sign.length);
 276         MD5Final(sig, &ctx);
 277
 278         torture_assert_mem_equal(tctx,
 279                                  &signed_reply.signed_packet.data[sign_req.packet_to_sign.length + 4],
 280                                  sig, 16, "Signature on reply was incorrect!");
 281
 282         talloc_free(mem_ctx);
 283
 284         return true;
 285 }
 286
 287 NTSTATUS torture_ntp_init(void)
 288 {
 289         struct torture_suite *suite = torture_suite_create(talloc_autofree_context(), "ntp");
 290         struct torture_rpc_tcase *tcase;
 291
 292         tcase = torture_suite_add_machine_workstation_rpc_iface_tcase(suite,
 293                                   "signd", &ndr_table_netlogon, TEST_MACHINE_NAME);
 294
 295         torture_rpc_tcase_add_test_creds(tcase, "ntp_signd", test_ntp_signd);
 296
 297         suite->description = talloc_strdup(suite, "NTP tests");
 298
 299         torture_register_suite(suite);
 300
 301         return NT_STATUS_OK;
 302 }
 303