summaryrefslogtreecommitdiff
path: root/source3/lib/util_sid.c
blob: bb9e2e98f97058d3fa3bb29cb0ff49d0340982ca (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
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
/* 
   Unix SMB/CIFS implementation.
   Samba utility functions
   Copyright (C) Andrew Tridgell 		1992-1998
   Copyright (C) Luke Kenneth Caseson Leighton 	1998-1999
   Copyright (C) Jeremy Allison  		1999
   Copyright (C) Stefan (metze) Metzmacher 	2002
   Copyright (C) Simo Sorce 			2002
   Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2005

   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 3 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, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "../librpc/gen_ndr/ndr_security.h"
#include "../librpc/gen_ndr/netlogon.h"
#include "../libcli/security/security.h"


/*****************************************************************
 Convert a SID to an ascii string.
*****************************************************************/

char *sid_to_fstring(fstring sidstr_out, const struct dom_sid *sid)
{
	char *str = sid_string_talloc(talloc_tos(), sid);
	fstrcpy(sidstr_out, str);
	TALLOC_FREE(str);
	return sidstr_out;
}

/*****************************************************************
 Essentially a renamed dom_sid_string from
 ../libcli/security/dom_sid.c with a panic if it didn't work.
*****************************************************************/

char *sid_string_talloc(TALLOC_CTX *mem_ctx, const struct dom_sid *sid)
{
	char *result = dom_sid_string(mem_ctx, sid);
	SMB_ASSERT(result != NULL);
	return result;
}

/*****************************************************************
 Useful function for debug lines.
*****************************************************************/

char *sid_string_dbg(const struct dom_sid *sid)
{
	return sid_string_talloc(talloc_tos(), sid);
}

/*****************************************************************
 Use with care!
*****************************************************************/

char *sid_string_tos(const struct dom_sid *sid)
{
	return sid_string_talloc(talloc_tos(), sid);
}

/*****************************************************************
 Write a sid out into on-the-wire format.
*****************************************************************/  

bool sid_linearize(char *outbuf, size_t len, const struct dom_sid *sid)
{
	size_t i;

	if (len < ndr_size_dom_sid(sid, 0))
		return False;

	SCVAL(outbuf,0,sid->sid_rev_num);
	SCVAL(outbuf,1,sid->num_auths);
	memcpy(&outbuf[2], sid->id_auth, 6);
	for(i = 0; i < sid->num_auths; i++)
		SIVAL(outbuf, 8 + (i*4), sid->sub_auths[i]);

	return True;
}

/*****************************************************************
 Returns true if SID is internal (and non-mappable).
*****************************************************************/

bool non_mappable_sid(struct dom_sid *sid)
{
	struct dom_sid dom;
	uint32 rid;

	sid_copy(&dom, sid);
	sid_split_rid(&dom, &rid);

	if (dom_sid_equal(&dom, &global_sid_Builtin))
		return True;

	if (dom_sid_equal(&dom, &global_sid_NT_Authority))
		return True;

	return False;
}

/*****************************************************************
 Return the binary string representation of a struct dom_sid.
 Caller must free.
*****************************************************************/

char *sid_binstring_hex(const struct dom_sid *sid)
{
	char *buf, *s;
	int len = ndr_size_dom_sid(sid, 0);
	buf = (char *)SMB_MALLOC(len);
	if (!buf)
		return NULL;
	sid_linearize(buf, len, sid);
	s = binary_string(buf, len);
	free(buf);
	return s;
}

NTSTATUS sid_array_from_info3(TALLOC_CTX *mem_ctx,
			      const struct netr_SamInfo3 *info3,
			      struct dom_sid **user_sids,
			      uint32_t *num_user_sids,
			      bool include_user_group_rid,
			      bool skip_ressource_groups)
{
	NTSTATUS status;
	struct dom_sid sid;
	struct dom_sid *sid_array = NULL;
	uint32_t num_sids = 0;
	int i;

	if (include_user_group_rid) {
		if (!sid_compose(&sid, info3->base.domain_sid, info3->base.rid)) {
			DEBUG(3, ("could not compose user SID from rid 0x%x\n",
				  info3->base.rid));
			return NT_STATUS_INVALID_PARAMETER;
		}
		status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids);
		if (!NT_STATUS_IS_OK(status)) {
			DEBUG(3, ("could not append user SID from rid 0x%x\n",
				  info3->base.rid));
			return status;
		}
	}

	if (!sid_compose(&sid, info3->base.domain_sid, info3->base.primary_gid)) {
		DEBUG(3, ("could not compose group SID from rid 0x%x\n",
			  info3->base.primary_gid));
		return NT_STATUS_INVALID_PARAMETER;
	}
	status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids);
	if (!NT_STATUS_IS_OK(status)) {
		DEBUG(3, ("could not append group SID from rid 0x%x\n",
			  info3->base.rid));
		return status;
	}

	for (i = 0; i < info3->base.groups.count; i++) {
		/* Don't add the primary group sid twice. */
		if (info3->base.primary_gid == info3->base.groups.rids[i].rid) {
			continue;
		}
		if (!sid_compose(&sid, info3->base.domain_sid,
				 info3->base.groups.rids[i].rid)) {
			DEBUG(3, ("could not compose SID from additional group "
				  "rid 0x%x\n", info3->base.groups.rids[i].rid));
			return NT_STATUS_INVALID_PARAMETER;
		}
		status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids);
		if (!NT_STATUS_IS_OK(status)) {
			DEBUG(3, ("could not append SID from additional group "
				  "rid 0x%x\n", info3->base.groups.rids[i].rid));
			return status;
		}
	}

	/* Copy 'other' sids.  We need to do sid filtering here to
 	   prevent possible elevation of privileges.  See:

           http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
         */

	for (i = 0; i < info3->sidcount; i++) {

		if (skip_ressource_groups &&
		    (info3->sids[i].attributes & SE_GROUP_RESOURCE)) {
			continue;
		}

		status = add_sid_to_array(mem_ctx, info3->sids[i].sid,
				      &sid_array, &num_sids);
		if (!NT_STATUS_IS_OK(status)) {
			DEBUG(3, ("could not add SID to array: %s\n",
				  sid_string_dbg(info3->sids[i].sid)));
			return status;
		}
	}

	*user_sids = sid_array;
	*num_user_sids = num_sids;

	return NT_STATUS_OK;
}