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[Samba.git] / auth / ntlmssp / ntlmssp.c
blob1a2d662439075597e4417c7cfcbfc914160e8804
1 /*
2 Unix SMB/Netbios implementation.
3 Version 3.0
4 handle NLTMSSP, client server side parsing
6 Copyright (C) Andrew Tridgell 2001
7 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2005
8 Copyright (C) Stefan Metzmacher 2005
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 struct auth_session_info;
26 #include "includes.h"
27 #include "auth/ntlmssp/ntlmssp.h"
28 #include "auth/ntlmssp/ntlmssp_private.h"
29 #include "../libcli/auth/libcli_auth.h"
30 #include "librpc/gen_ndr/ndr_dcerpc.h"
31 #include "auth/gensec/gensec.h"
33 /**
34 * Callbacks for NTLMSSP - for both client and server operating modes
38 static const struct ntlmssp_callbacks {
39 enum ntlmssp_role role;
40 enum ntlmssp_message_type command;
41 NTSTATUS (*sync_fn)(struct gensec_security *gensec_security,
42 TALLOC_CTX *out_mem_ctx,
43 DATA_BLOB in, DATA_BLOB *out);
44 } ntlmssp_callbacks[] = {
46 .role = NTLMSSP_CLIENT,
47 .command = NTLMSSP_INITIAL,
48 .sync_fn = ntlmssp_client_initial,
49 },{
50 .role = NTLMSSP_SERVER,
51 .command = NTLMSSP_NEGOTIATE,
52 .sync_fn = gensec_ntlmssp_server_negotiate,
53 },{
54 .role = NTLMSSP_CLIENT,
55 .command = NTLMSSP_CHALLENGE,
56 .sync_fn = ntlmssp_client_challenge,
57 },{
58 .role = NTLMSSP_SERVER,
59 .command = NTLMSSP_AUTH,
60 .sync_fn = gensec_ntlmssp_server_auth,
65 static NTSTATUS gensec_ntlmssp_update_find(struct gensec_security *gensec_security,
66 struct gensec_ntlmssp_context *gensec_ntlmssp,
67 const DATA_BLOB input, uint32_t *idx)
69 uint32_t ntlmssp_command;
70 uint32_t i;
72 if (gensec_ntlmssp->ntlmssp_state->expected_state == NTLMSSP_DONE) {
73 /* We are strict here because other modules, which we
74 * don't fully control (such as GSSAPI) are also
75 * strict, but are tested less often */
77 DEBUG(1, ("Called NTLMSSP after state machine was 'done'\n"));
78 return NT_STATUS_INVALID_PARAMETER;
81 if (!input.length) {
82 switch (gensec_ntlmssp->ntlmssp_state->role) {
83 case NTLMSSP_CLIENT:
84 ntlmssp_command = NTLMSSP_INITIAL;
85 break;
86 case NTLMSSP_SERVER:
87 if (gensec_security->want_features & GENSEC_FEATURE_DATAGRAM_MODE) {
88 /* 'datagram' mode - no neg packet */
89 ntlmssp_command = NTLMSSP_NEGOTIATE;
90 } else {
91 /* This is normal in SPNEGO mech negotiation fallback */
92 DEBUG(2, ("Failed to parse NTLMSSP packet: zero length\n"));
93 return NT_STATUS_INVALID_PARAMETER;
95 break;
97 } else {
98 if (!msrpc_parse(gensec_ntlmssp->ntlmssp_state,
99 &input, "Cd",
100 "NTLMSSP",
101 &ntlmssp_command)) {
102 DEBUG(1, ("Failed to parse NTLMSSP packet, could not extract NTLMSSP command\n"));
103 dump_data(2, input.data, input.length);
104 return NT_STATUS_INVALID_PARAMETER;
108 if (ntlmssp_command != gensec_ntlmssp->ntlmssp_state->expected_state) {
109 DEBUG(2, ("got NTLMSSP command %u, expected %u\n", ntlmssp_command,
110 gensec_ntlmssp->ntlmssp_state->expected_state));
111 return NT_STATUS_INVALID_PARAMETER;
114 for (i=0; i < ARRAY_SIZE(ntlmssp_callbacks); i++) {
115 if (ntlmssp_callbacks[i].role == gensec_ntlmssp->ntlmssp_state->role &&
116 ntlmssp_callbacks[i].command == ntlmssp_command) {
117 *idx = i;
118 return NT_STATUS_OK;
122 DEBUG(1, ("failed to find NTLMSSP callback for NTLMSSP mode %u, command %u\n",
123 gensec_ntlmssp->ntlmssp_state->role, ntlmssp_command));
125 return NT_STATUS_INVALID_PARAMETER;
129 * Next state function for the wrapped NTLMSSP state machine
131 * @param gensec_security GENSEC state, initialised to NTLMSSP
132 * @param out_mem_ctx The TALLOC_CTX for *out to be allocated on
133 * @param in The request, as a DATA_BLOB
134 * @param out The reply, as an talloc()ed DATA_BLOB, on *out_mem_ctx
135 * @return Error, MORE_PROCESSING_REQUIRED if a reply is sent,
136 * or NT_STATUS_OK if the user is authenticated.
139 NTSTATUS gensec_ntlmssp_update(struct gensec_security *gensec_security,
140 TALLOC_CTX *out_mem_ctx,
141 struct tevent_context *ev,
142 const DATA_BLOB input, DATA_BLOB *out)
144 struct gensec_ntlmssp_context *gensec_ntlmssp =
145 talloc_get_type_abort(gensec_security->private_data,
146 struct gensec_ntlmssp_context);
147 struct ntlmssp_state *ntlmssp_state = gensec_ntlmssp->ntlmssp_state;
148 NTSTATUS status;
149 uint32_t i;
151 *out = data_blob(NULL, 0);
153 if (!out_mem_ctx) {
154 /* if the caller doesn't want to manage/own the memory,
155 we can put it on our context */
156 out_mem_ctx = ntlmssp_state;
159 status = gensec_ntlmssp_update_find(gensec_security, gensec_ntlmssp, input, &i);
160 NT_STATUS_NOT_OK_RETURN(status);
162 status = ntlmssp_callbacks[i].sync_fn(gensec_security, out_mem_ctx, input, out);
163 NT_STATUS_NOT_OK_RETURN(status);
165 return NT_STATUS_OK;
168 static const char *gensec_ntlmssp_oids[] = {
169 GENSEC_OID_NTLMSSP,
170 NULL
173 static const struct gensec_security_ops gensec_ntlmssp_security_ops = {
174 .name = "ntlmssp",
175 .sasl_name = GENSEC_SASL_NAME_NTLMSSP, /* "NTLM" */
176 .auth_type = DCERPC_AUTH_TYPE_NTLMSSP,
177 .oid = gensec_ntlmssp_oids,
178 .client_start = gensec_ntlmssp_client_start,
179 .server_start = gensec_ntlmssp_server_start,
180 .magic = gensec_ntlmssp_magic,
181 .update = gensec_ntlmssp_update,
182 .sig_size = gensec_ntlmssp_sig_size,
183 .sign_packet = gensec_ntlmssp_sign_packet,
184 .check_packet = gensec_ntlmssp_check_packet,
185 .seal_packet = gensec_ntlmssp_seal_packet,
186 .unseal_packet = gensec_ntlmssp_unseal_packet,
187 .wrap = gensec_ntlmssp_wrap,
188 .unwrap = gensec_ntlmssp_unwrap,
189 .session_key = gensec_ntlmssp_session_key,
190 .session_info = gensec_ntlmssp_session_info,
191 .have_feature = gensec_ntlmssp_have_feature,
192 .enabled = true,
193 .priority = GENSEC_NTLMSSP
197 _PUBLIC_ NTSTATUS gensec_ntlmssp_init(void)
199 NTSTATUS ret;
201 ret = gensec_register(&gensec_ntlmssp_security_ops);
202 if (!NT_STATUS_IS_OK(ret)) {
203 DEBUG(0,("Failed to register '%s' gensec backend!\n",
204 gensec_ntlmssp_security_ops.name));
205 return ret;
208 return ret;
211 uint32_t gensec_ntlmssp_neg_flags(struct gensec_security *gensec_security)
213 struct gensec_ntlmssp_context *gensec_ntlmssp;
214 if (gensec_security->ops != &gensec_ntlmssp_security_ops) {
215 return 0;
217 gensec_ntlmssp = talloc_get_type_abort(gensec_security->private_data,
218 struct gensec_ntlmssp_context);
219 return gensec_ntlmssp->ntlmssp_state->neg_flags;