summaryrefslogtreecommitdiff
path: root/source4/librpc/rpc/dcerpc_ntlm.c
blob: 8bfe0cb5ee73e94ec21133b51cdf3b9d19c709b2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
/* 
   Unix SMB/CIFS implementation.

   dcerpc authentication operations

   Copyright (C) Andrew Tridgell 2003
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"

/*
  wrappers for the ntlmssp_*() functions
*/
static NTSTATUS ntlm_unseal_packet(struct dcerpc_security *dcerpc_security, 
				  uchar *data, size_t length, DATA_BLOB *sig)
{
	struct ntlmssp_state *ntlmssp_state = dcerpc_security->private;
	return ntlmssp_unseal_packet(ntlmssp_state, data, length, sig);
}

static NTSTATUS ntlm_check_packet(struct dcerpc_security *dcerpc_security, 
				  const uchar *data, size_t length, 
				  const DATA_BLOB *sig)
{
	struct ntlmssp_state *ntlmssp_state = dcerpc_security->private;
	return ntlmssp_check_packet(ntlmssp_state, data, length, sig);
}

static NTSTATUS ntlm_seal_packet(struct dcerpc_security *dcerpc_security, 
				 uchar *data, size_t length, 
				 DATA_BLOB *sig)
{
	struct ntlmssp_state *ntlmssp_state = dcerpc_security->private;
	return ntlmssp_seal_packet(ntlmssp_state, data, length, sig);
}

static NTSTATUS ntlm_sign_packet(struct dcerpc_security *dcerpc_security, 
				 const uchar *data, size_t length, 
				 DATA_BLOB *sig)
{
	struct ntlmssp_state *ntlmssp_state = dcerpc_security->private;
	return ntlmssp_sign_packet(ntlmssp_state, data, length, sig);
}

static void ntlm_security_end(struct dcerpc_security *dcerpc_security)
{
	struct ntlmssp_state *ntlmssp_state = dcerpc_security->private;
	return ntlmssp_end(&ntlmssp_state);
}



/*
  do ntlm style authentication on a dcerpc pipe
*/
NTSTATUS dcerpc_bind_auth_ntlm(struct dcerpc_pipe *p,
			       const char *uuid, unsigned version,
			       const char *domain,
			       const char *username,
			       const char *password)
{
	NTSTATUS status;
	struct ntlmssp_state *state;
	TALLOC_CTX *mem_ctx;
	DATA_BLOB credentials;

	mem_ctx = talloc_init("dcerpc_bind_auth_ntlm");
	if (!mem_ctx) {
		return NT_STATUS_NO_MEMORY;
	}

	status = ntlmssp_client_start(&state);
	if (!NT_STATUS_IS_OK(status)) {
		return status;
	}

	status = ntlmssp_set_domain(state, domain);
	if (!NT_STATUS_IS_OK(status)) {
		goto done;
	}
	
	status = ntlmssp_set_username(state, username);
	if (!NT_STATUS_IS_OK(status)) {
		goto done;
	}

	status = ntlmssp_set_password(state, password);
	if (!NT_STATUS_IS_OK(status)) {
		goto done;
	}

	p->auth_info = talloc(p->mem_ctx, sizeof(*p->auth_info));
	if (!p->auth_info) {
		status = NT_STATUS_NO_MEMORY;
		goto done;
	}

	p->auth_info->auth_type = DCERPC_AUTH_TYPE_NTLMSSP;
	
	if (p->flags & DCERPC_SEAL) {
		p->auth_info->auth_level = DCERPC_AUTH_LEVEL_PRIVACY;
		state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN | NTLMSSP_NEGOTIATE_SEAL;
	} else {
		/* ntlmssp does not work on dcerpc with
		   AUTH_LEVEL_NONE */
		state->neg_flags |= NTLMSSP_NEGOTIATE_SIGN;
		p->auth_info->auth_level = DCERPC_AUTH_LEVEL_INTEGRITY;
	}
	p->auth_info->auth_pad_length = 0;
	p->auth_info->auth_reserved = 0;
	p->auth_info->auth_context_id = random();
	p->auth_info->credentials = data_blob(NULL, 0);
	p->security_state = NULL;

	status = ntlmssp_update(state, 
				p->auth_info->credentials,
				&credentials);
	if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
		goto done;
	}

	p->auth_info->credentials = data_blob_talloc(mem_ctx, 
						     credentials.data, 
						     credentials.length);
	data_blob_free(&credentials);

	status = dcerpc_bind_byuuid(p, mem_ctx, uuid, version);
	if (!NT_STATUS_IS_OK(status)) {
		goto done;
	}


	status = ntlmssp_update(state, 
				p->auth_info->credentials, 
				&credentials);
	if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
		goto done;
	}

	p->auth_info->credentials = data_blob_talloc(mem_ctx, 
						     credentials.data, 
						     credentials.length);
	data_blob_free(&credentials);

	status = dcerpc_auth3(p, mem_ctx);

	if (!NT_STATUS_IS_OK(status)) {
		goto done;
	}

	p->security_state = talloc_p(p->mem_ctx, struct dcerpc_security);
	if (!p->security_state) {
		status = NT_STATUS_NO_MEMORY;
		goto done;
	}

	p->security_state->private = state;
	p->security_state->unseal_packet = ntlm_unseal_packet;
	p->security_state->check_packet = ntlm_check_packet;
	p->security_state->seal_packet = ntlm_seal_packet;
	p->security_state->sign_packet = ntlm_sign_packet;
	p->security_state->security_end = ntlm_security_end;

	switch (p->auth_info->auth_level) {
	case DCERPC_AUTH_LEVEL_PRIVACY:
	case DCERPC_AUTH_LEVEL_INTEGRITY:
		/* setup for signing */
		status = ntlmssp_sign_init(state);
		break;
	}

done:
	talloc_destroy(mem_ctx);

	if (!NT_STATUS_IS_OK(status)) {
		p->security_state = NULL;
		p->auth_info = NULL;
	}

	return status;
}