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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/*
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}