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1/*
2 * security/tomoyo/group.c
3 *
4 * Copyright (C) 2005-2011 NTT DATA CORPORATION
5 */
6
7#include <linux/slab.h>
8#include "common.h"
9
10/**
11 * tomoyo_same_path_group - Check for duplicated "struct tomoyo_path_group" entry.
12 *
13 * @a: Pointer to "struct tomoyo_acl_head".
14 * @b: Pointer to "struct tomoyo_acl_head".
15 *
16 * Returns true if @a == @b, false otherwise.
17 */
18static bool tomoyo_same_path_group(const struct tomoyo_acl_head *a,
19 const struct tomoyo_acl_head *b)
20{
21 return container_of(a, struct tomoyo_path_group, head)->member_name ==
22 container_of(b, struct tomoyo_path_group, head)->member_name;
23}
24
25/**
26 * tomoyo_same_number_group - Check for duplicated "struct tomoyo_number_group" entry.
27 *
28 * @a: Pointer to "struct tomoyo_acl_head".
29 * @b: Pointer to "struct tomoyo_acl_head".
30 *
31 * Returns true if @a == @b, false otherwise.
32 */
33static bool tomoyo_same_number_group(const struct tomoyo_acl_head *a,
34 const struct tomoyo_acl_head *b)
35{
36 return !memcmp(&container_of(a, struct tomoyo_number_group, head)
37 ->number,
38 &container_of(b, struct tomoyo_number_group, head)
39 ->number,
40 sizeof(container_of(a, struct tomoyo_number_group, head)
41 ->number));
42}
43
44/**
45 * tomoyo_same_address_group - Check for duplicated "struct tomoyo_address_group" entry.
46 *
47 * @a: Pointer to "struct tomoyo_acl_head".
48 * @b: Pointer to "struct tomoyo_acl_head".
49 *
50 * Returns true if @a == @b, false otherwise.
51 */
52static bool tomoyo_same_address_group(const struct tomoyo_acl_head *a,
53 const struct tomoyo_acl_head *b)
54{
55 const struct tomoyo_address_group *p1 = container_of(a, typeof(*p1),
56 head);
57 const struct tomoyo_address_group *p2 = container_of(b, typeof(*p2),
58 head);
59
60 return tomoyo_same_ipaddr_union(&p1->address, &p2->address);
61}
62
63/**
64 * tomoyo_write_group - Write "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list.
65 *
66 * @param: Pointer to "struct tomoyo_acl_param".
67 * @type: Type of this group.
68 *
69 * Returns 0 on success, negative value otherwise.
70 */
71int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type)
72{
73 struct tomoyo_group *group = tomoyo_get_group(param, type);
74 int error = -EINVAL;
75 if (!group)
76 return -ENOMEM;
77 param->list = &group->member_list;
78 if (type == TOMOYO_PATH_GROUP) {
79 struct tomoyo_path_group e = { };
80 e.member_name = tomoyo_get_name(tomoyo_read_token(param));
81 if (!e.member_name) {
82 error = -ENOMEM;
83 goto out;
84 }
85 error = tomoyo_update_policy(&e.head, sizeof(e), param,
86 tomoyo_same_path_group);
87 tomoyo_put_name(e.member_name);
88 } else if (type == TOMOYO_NUMBER_GROUP) {
89 struct tomoyo_number_group e = { };
90 if (param->data[0] == '@' ||
91 !tomoyo_parse_number_union(param, &e.number))
92 goto out;
93 error = tomoyo_update_policy(&e.head, sizeof(e), param,
94 tomoyo_same_number_group);
95 /*
96 * tomoyo_put_number_union() is not needed because
97 * param->data[0] != '@'.
98 */
99 } else {
100 struct tomoyo_address_group e = { };
101
102 if (param->data[0] == '@' ||
103 !tomoyo_parse_ipaddr_union(param, &e.address))
104 goto out;
105 error = tomoyo_update_policy(&e.head, sizeof(e), param,
106 tomoyo_same_address_group);
107 }
108out:
109 tomoyo_put_group(group);
110 return error;
111}
112
113/**
114 * tomoyo_path_matches_group - Check whether the given pathname matches members of the given pathname group.
115 *
116 * @pathname: The name of pathname.
117 * @group: Pointer to "struct tomoyo_path_group".
118 *
119 * Returns matched member's pathname if @pathname matches pathnames in @group,
120 * NULL otherwise.
121 *
122 * Caller holds tomoyo_read_lock().
123 */
124const struct tomoyo_path_info *
125tomoyo_path_matches_group(const struct tomoyo_path_info *pathname,
126 const struct tomoyo_group *group)
127{
128 struct tomoyo_path_group *member;
129 list_for_each_entry_rcu(member, &group->member_list, head.list) {
130 if (member->head.is_deleted)
131 continue;
132 if (!tomoyo_path_matches_pattern(pathname, member->member_name))
133 continue;
134 return member->member_name;
135 }
136 return NULL;
137}
138
139/**
140 * tomoyo_number_matches_group - Check whether the given number matches members of the given number group.
141 *
142 * @min: Min number.
143 * @max: Max number.
144 * @group: Pointer to "struct tomoyo_number_group".
145 *
146 * Returns true if @min and @max partially overlaps @group, false otherwise.
147 *
148 * Caller holds tomoyo_read_lock().
149 */
150bool tomoyo_number_matches_group(const unsigned long min,
151 const unsigned long max,
152 const struct tomoyo_group *group)
153{
154 struct tomoyo_number_group *member;
155 bool matched = false;
156 list_for_each_entry_rcu(member, &group->member_list, head.list) {
157 if (member->head.is_deleted)
158 continue;
159 if (min > member->number.values[1] ||
160 max < member->number.values[0])
161 continue;
162 matched = true;
163 break;
164 }
165 return matched;
166}
167
168/**
169 * tomoyo_address_matches_group - Check whether the given address matches members of the given address group.
170 *
171 * @is_ipv6: True if @address is an IPv6 address.
172 * @address: An IPv4 or IPv6 address.
173 * @group: Pointer to "struct tomoyo_address_group".
174 *
175 * Returns true if @address matches addresses in @group group, false otherwise.
176 *
177 * Caller holds tomoyo_read_lock().
178 */
179bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
180 const struct tomoyo_group *group)
181{
182 struct tomoyo_address_group *member;
183 bool matched = false;
184 const u8 size = is_ipv6 ? 16 : 4;
185
186 list_for_each_entry_rcu(member, &group->member_list, head.list) {
187 if (member->head.is_deleted)
188 continue;
189 if (member->address.is_ipv6 != is_ipv6)
190 continue;
191 if (memcmp(&member->address.ip[0], address, size) > 0 ||
192 memcmp(address, &member->address.ip[1], size) > 0)
193 continue;
194 matched = true;
195 break;
196 }
197 return matched;
198}
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * security/tomoyo/group.c
4 *
5 * Copyright (C) 2005-2011 NTT DATA CORPORATION
6 */
7
8#include <linux/slab.h>
9#include <linux/rculist.h>
10
11#include "common.h"
12
13/**
14 * tomoyo_same_path_group - Check for duplicated "struct tomoyo_path_group" entry.
15 *
16 * @a: Pointer to "struct tomoyo_acl_head".
17 * @b: Pointer to "struct tomoyo_acl_head".
18 *
19 * Returns true if @a == @b, false otherwise.
20 */
21static bool tomoyo_same_path_group(const struct tomoyo_acl_head *a,
22 const struct tomoyo_acl_head *b)
23{
24 return container_of(a, struct tomoyo_path_group, head)->member_name ==
25 container_of(b, struct tomoyo_path_group, head)->member_name;
26}
27
28/**
29 * tomoyo_same_number_group - Check for duplicated "struct tomoyo_number_group" entry.
30 *
31 * @a: Pointer to "struct tomoyo_acl_head".
32 * @b: Pointer to "struct tomoyo_acl_head".
33 *
34 * Returns true if @a == @b, false otherwise.
35 */
36static bool tomoyo_same_number_group(const struct tomoyo_acl_head *a,
37 const struct tomoyo_acl_head *b)
38{
39 return !memcmp(&container_of(a, struct tomoyo_number_group, head)
40 ->number,
41 &container_of(b, struct tomoyo_number_group, head)
42 ->number,
43 sizeof(container_of(a, struct tomoyo_number_group, head)
44 ->number));
45}
46
47/**
48 * tomoyo_same_address_group - Check for duplicated "struct tomoyo_address_group" entry.
49 *
50 * @a: Pointer to "struct tomoyo_acl_head".
51 * @b: Pointer to "struct tomoyo_acl_head".
52 *
53 * Returns true if @a == @b, false otherwise.
54 */
55static bool tomoyo_same_address_group(const struct tomoyo_acl_head *a,
56 const struct tomoyo_acl_head *b)
57{
58 const struct tomoyo_address_group *p1 = container_of(a, typeof(*p1),
59 head);
60 const struct tomoyo_address_group *p2 = container_of(b, typeof(*p2),
61 head);
62
63 return tomoyo_same_ipaddr_union(&p1->address, &p2->address);
64}
65
66/**
67 * tomoyo_write_group - Write "struct tomoyo_path_group"/"struct tomoyo_number_group"/"struct tomoyo_address_group" list.
68 *
69 * @param: Pointer to "struct tomoyo_acl_param".
70 * @type: Type of this group.
71 *
72 * Returns 0 on success, negative value otherwise.
73 */
74int tomoyo_write_group(struct tomoyo_acl_param *param, const u8 type)
75{
76 struct tomoyo_group *group = tomoyo_get_group(param, type);
77 int error = -EINVAL;
78 if (!group)
79 return -ENOMEM;
80 param->list = &group->member_list;
81 if (type == TOMOYO_PATH_GROUP) {
82 struct tomoyo_path_group e = { };
83 e.member_name = tomoyo_get_name(tomoyo_read_token(param));
84 if (!e.member_name) {
85 error = -ENOMEM;
86 goto out;
87 }
88 error = tomoyo_update_policy(&e.head, sizeof(e), param,
89 tomoyo_same_path_group);
90 tomoyo_put_name(e.member_name);
91 } else if (type == TOMOYO_NUMBER_GROUP) {
92 struct tomoyo_number_group e = { };
93 if (param->data[0] == '@' ||
94 !tomoyo_parse_number_union(param, &e.number))
95 goto out;
96 error = tomoyo_update_policy(&e.head, sizeof(e), param,
97 tomoyo_same_number_group);
98 /*
99 * tomoyo_put_number_union() is not needed because
100 * param->data[0] != '@'.
101 */
102 } else {
103 struct tomoyo_address_group e = { };
104
105 if (param->data[0] == '@' ||
106 !tomoyo_parse_ipaddr_union(param, &e.address))
107 goto out;
108 error = tomoyo_update_policy(&e.head, sizeof(e), param,
109 tomoyo_same_address_group);
110 }
111out:
112 tomoyo_put_group(group);
113 return error;
114}
115
116/**
117 * tomoyo_path_matches_group - Check whether the given pathname matches members of the given pathname group.
118 *
119 * @pathname: The name of pathname.
120 * @group: Pointer to "struct tomoyo_path_group".
121 *
122 * Returns matched member's pathname if @pathname matches pathnames in @group,
123 * NULL otherwise.
124 *
125 * Caller holds tomoyo_read_lock().
126 */
127const struct tomoyo_path_info *
128tomoyo_path_matches_group(const struct tomoyo_path_info *pathname,
129 const struct tomoyo_group *group)
130{
131 struct tomoyo_path_group *member;
132 list_for_each_entry_rcu(member, &group->member_list, head.list) {
133 if (member->head.is_deleted)
134 continue;
135 if (!tomoyo_path_matches_pattern(pathname, member->member_name))
136 continue;
137 return member->member_name;
138 }
139 return NULL;
140}
141
142/**
143 * tomoyo_number_matches_group - Check whether the given number matches members of the given number group.
144 *
145 * @min: Min number.
146 * @max: Max number.
147 * @group: Pointer to "struct tomoyo_number_group".
148 *
149 * Returns true if @min and @max partially overlaps @group, false otherwise.
150 *
151 * Caller holds tomoyo_read_lock().
152 */
153bool tomoyo_number_matches_group(const unsigned long min,
154 const unsigned long max,
155 const struct tomoyo_group *group)
156{
157 struct tomoyo_number_group *member;
158 bool matched = false;
159 list_for_each_entry_rcu(member, &group->member_list, head.list) {
160 if (member->head.is_deleted)
161 continue;
162 if (min > member->number.values[1] ||
163 max < member->number.values[0])
164 continue;
165 matched = true;
166 break;
167 }
168 return matched;
169}
170
171/**
172 * tomoyo_address_matches_group - Check whether the given address matches members of the given address group.
173 *
174 * @is_ipv6: True if @address is an IPv6 address.
175 * @address: An IPv4 or IPv6 address.
176 * @group: Pointer to "struct tomoyo_address_group".
177 *
178 * Returns true if @address matches addresses in @group group, false otherwise.
179 *
180 * Caller holds tomoyo_read_lock().
181 */
182bool tomoyo_address_matches_group(const bool is_ipv6, const __be32 *address,
183 const struct tomoyo_group *group)
184{
185 struct tomoyo_address_group *member;
186 bool matched = false;
187 const u8 size = is_ipv6 ? 16 : 4;
188
189 list_for_each_entry_rcu(member, &group->member_list, head.list) {
190 if (member->head.is_deleted)
191 continue;
192 if (member->address.is_ipv6 != is_ipv6)
193 continue;
194 if (memcmp(&member->address.ip[0], address, size) > 0 ||
195 memcmp(address, &member->address.ip[1], size) > 0)
196 continue;
197 matched = true;
198 break;
199 }
200 return matched;
201}