Merge commit 'release-4-0-0alpha2' into v4-0-test
[kai/samba-autobuild/.git] / source4 / smb_server / smb2 / negprot.c
1 /* 
2    Unix SMB2 implementation.
3    
4    Copyright (C) Andrew Bartlett        2001-2005
5    Copyright (C) Stefan Metzmacher      2005
6    
7    This program is free software; you can redistribute it and/or modify
8    it under the terms of the GNU General Public License as published by
9    the Free Software Foundation; either version 3 of the License, or
10    (at your option) any later version.
11    
12    This program is distributed in the hope that it will be useful,
13    but WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15    GNU General Public License for more details.
16    
17    You should have received a copy of the GNU General Public License
18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include "includes.h"
22 #include "auth/credentials/credentials.h"
23 #include "auth/gensec/gensec.h"
24 #include "libcli/smb2/smb2.h"
25 #include "libcli/smb2/smb2_calls.h"
26 #include "smb_server/smb_server.h"
27 #include "smb_server/service_smb_proto.h"
28 #include "smb_server/smb2/smb2_server.h"
29 #include "smbd/service_stream.h"
30 #include "param/param.h"
31
32 static NTSTATUS smb2srv_negprot_secblob(struct smb2srv_request *req, DATA_BLOB *_blob)
33 {
34         struct gensec_security *gensec_security;
35         DATA_BLOB null_data_blob = data_blob(NULL, 0);
36         DATA_BLOB blob;
37         NTSTATUS nt_status;
38         struct cli_credentials *server_credentials;
39
40         nt_status = gensec_server_start(req,
41                                         req->smb_conn->connection->event.ctx,
42                                         req->smb_conn->lp_ctx,
43                                         req->smb_conn->connection->msg_ctx,
44                                         &gensec_security);
45         if (!NT_STATUS_IS_OK(nt_status)) {
46                 DEBUG(0, ("Failed to start GENSEC: %s\n", nt_errstr(nt_status)));
47                 smbsrv_terminate_connection(req->smb_conn, "Failed to start GENSEC\n");
48                 return nt_status;
49         }
50
51         server_credentials = cli_credentials_init(req);
52         if (!server_credentials) {
53                 smbsrv_terminate_connection(req->smb_conn, "Failed to init server credentials\n");
54                 return NT_STATUS_NO_MEMORY;
55         }
56
57         cli_credentials_set_conf(server_credentials, req->smb_conn->lp_ctx);
58         nt_status = cli_credentials_set_machine_account(server_credentials, req->smb_conn->lp_ctx);
59         if (!NT_STATUS_IS_OK(nt_status)) {
60                 DEBUG(10, ("Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(nt_status)));
61                 talloc_free(server_credentials);
62                 server_credentials = NULL;
63         }
64
65         req->smb_conn->negotiate.server_credentials = talloc_steal(req->smb_conn, server_credentials);
66
67         gensec_set_target_service(gensec_security, "cifs");
68
69         gensec_set_credentials(gensec_security, server_credentials);
70
71         nt_status = gensec_start_mech_by_oid(gensec_security, GENSEC_OID_SPNEGO);
72         if (!NT_STATUS_IS_OK(nt_status)) {
73                 DEBUG(0, ("Failed to start SPNEGO: %s\n", nt_errstr(nt_status)));
74                 smbsrv_terminate_connection(req->smb_conn, "Failed to start SPNEGO\n");
75                 return nt_status;
76         }
77
78         nt_status = gensec_update(gensec_security, req, null_data_blob, &blob);
79         if (!NT_STATUS_IS_OK(nt_status) && !NT_STATUS_EQUAL(nt_status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
80                 DEBUG(0, ("Failed to get SPNEGO to give us the first token: %s\n", nt_errstr(nt_status)));
81                 smbsrv_terminate_connection(req->smb_conn, "Failed to start SPNEGO - no first token\n");
82                 return nt_status;
83         }
84
85         *_blob = blob;
86         return NT_STATUS_OK;
87 }
88
89 static NTSTATUS smb2srv_negprot_backend(struct smb2srv_request *req, struct smb2_negprot *io)
90 {
91         NTSTATUS status;
92         struct timeval current_time;
93         struct timeval boot_time;
94
95         req->smb_conn->negotiate.protocol = PROTOCOL_SMB2;
96
97         current_time = timeval_current(); /* TODO: handle timezone?! */
98         boot_time = timeval_current(); /* TODO: fix me */
99
100         io->out._pad            = 0;
101         io->out.unknown2        = 0x06;
102         ZERO_STRUCT(io->out.sessid);
103         io->out.unknown3        = 0x0d;
104         io->out.unknown4        = 0x00;
105         io->out.unknown5        = 0x01;
106         io->out.unknown6        = 0x01;
107         io->out.unknown7        = 0x01;
108         io->out.current_time    = timeval_to_nttime(&current_time);
109         io->out.boot_time       = timeval_to_nttime(&boot_time);
110         status = smb2srv_negprot_secblob(req, &io->out.secblob);
111         NT_STATUS_NOT_OK_RETURN(status);
112         io->out.unknown9        = 0x204d4c20;
113
114         return NT_STATUS_OK;
115 }
116
117 static void smb2srv_negprot_send(struct smb2srv_request *req, struct smb2_negprot *io)
118 {
119         NTSTATUS status;
120
121         if (NT_STATUS_IS_ERR(req->status)) {
122                 smb2srv_send_error(req, req->status); /* TODO: is this correct? */
123                 return;
124         }
125
126         status = smb2srv_setup_reply(req, 0x40, true, io->out.secblob.length);
127         if (!NT_STATUS_IS_OK(status)) {
128                 smbsrv_terminate_connection(req->smb_conn, nt_errstr(status));
129                 talloc_free(req);
130                 return;
131         }
132
133         SSVAL(req->out.body, 0x02, io->out._pad);
134         SIVAL(req->out.body, 0x04, io->out.unknown2);
135         memcpy(req->out.body+0x08, io->out.sessid, 16);
136         SIVAL(req->out.body, 0x18, io->out.unknown3);
137         SSVAL(req->out.body, 0x1C, io->out.unknown4);
138         SIVAL(req->out.body, 0x1E, io->out.unknown5);
139         SIVAL(req->out.body, 0x22, io->out.unknown6);
140         SSVAL(req->out.body, 0x26, io->out.unknown7);
141         push_nttime(req->out.body, 0x28, io->out.current_time);
142         push_nttime(req->out.body, 0x30, io->out.boot_time);
143         status = smb2_push_o16s16_blob(&req->out, 0x38, io->out.secblob);
144         if (!NT_STATUS_IS_OK(status)) {
145                 smbsrv_terminate_connection(req->smb_conn, nt_errstr(status));
146                 talloc_free(req);
147                 return;
148         }
149
150         SIVAL(req->out.body, 0x3C, io->out.unknown9);
151
152         smb2srv_send_reply(req);
153 }
154
155 void smb2srv_negprot_recv(struct smb2srv_request *req)
156 {
157         struct smb2_negprot *io;
158
159         if (req->in.body_size < 0x26) {
160                 smb2srv_send_error(req,  NT_STATUS_FOOBAR);
161                 return;
162         }
163
164         io = talloc(req, struct smb2_negprot);
165         if (!io) {
166                 smbsrv_terminate_connection(req->smb_conn, nt_errstr(NT_STATUS_NO_MEMORY));
167                 talloc_free(req);
168                 return;
169         }
170
171         io->in.unknown1 = SVAL(req->in.body, 0x02);
172         memcpy(io->in.unknown2, req->in.body + 0x04, 0x20);
173         io->in.unknown3 = SVAL(req->in.body, 0x24);
174
175         req->status = smb2srv_negprot_backend(req, io);
176
177         if (req->control_flags & SMB2SRV_REQ_CTRL_FLAG_NOT_REPLY) {
178                 talloc_free(req);
179                 return;
180         }
181         smb2srv_negprot_send(req, io);
182 }
183
184 /*
185  * reply to a SMB negprot request with dialect "SMB 2.001"
186  */
187 void smb2srv_reply_smb_negprot(struct smbsrv_request *smb_req)
188 {
189         struct smb2srv_request *req;
190         uint32_t body_fixed_size = 0x26;
191
192         /* create a fake SMB2 negprot request */
193         req = talloc_zero(smb_req->smb_conn, struct smb2srv_request);
194         if (!req) goto nomem;
195         req->smb_conn           = smb_req->smb_conn;
196         req->request_time       = smb_req->request_time;
197         talloc_steal(req, smb_req);
198
199         req->in.size      = NBT_HDR_SIZE+SMB2_HDR_BODY+body_fixed_size;
200         req->in.allocated = req->in.size;
201         req->in.buffer    = talloc_array(req, uint8_t, req->in.allocated);
202         if (!req->in.buffer) goto nomem;
203         req->in.hdr       = req->in.buffer + NBT_HDR_SIZE;
204         req->in.body      = req->in.hdr + SMB2_HDR_BODY;
205         req->in.body_size = body_fixed_size;
206         req->in.dynamic   = NULL;
207
208         SIVAL(req->in.hdr, 0,                           SMB2_MAGIC);
209         SSVAL(req->in.hdr, SMB2_HDR_LENGTH,             SMB2_HDR_BODY);
210         SSVAL(req->in.hdr, SMB2_HDR_PAD1,               0);
211         SIVAL(req->in.hdr, SMB2_HDR_STATUS,             0);
212         SSVAL(req->in.hdr, SMB2_HDR_OPCODE,             SMB2_OP_NEGPROT);
213         SSVAL(req->in.hdr, SMB2_HDR_UNKNOWN1,           0);
214         SIVAL(req->in.hdr, SMB2_HDR_FLAGS,              0);
215         SIVAL(req->in.hdr, SMB2_HDR_CHAIN_OFFSET,       0);
216         SBVAL(req->in.hdr, SMB2_HDR_SEQNUM,             0);
217         SIVAL(req->in.hdr, SMB2_HDR_PID,                0);
218         SIVAL(req->in.hdr, SMB2_HDR_TID,                0);
219         SBVAL(req->in.hdr, SMB2_HDR_UID,                0);
220         memset(req->in.hdr+SMB2_HDR_SIG, 0, 16);
221
222         /* this seems to be a bug, they use 0x24 but the length is 0x26 */
223         SSVAL(req->in.body, 0x00, 0x24);
224
225         SSVAL(req->in.body, 0x02, 1);
226         memset(req->in.body+0x04, 0, 32);
227         SSVAL(req->in.body, 0x24, 0);
228
229         smb2srv_negprot_recv(req);
230         return;
231 nomem:
232         smbsrv_terminate_connection(smb_req->smb_conn, nt_errstr(NT_STATUS_NO_MEMORY));
233         talloc_free(req);
234         return;
235 }