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1 /* internal.h: authentication token and access 1 /* internal.h: authentication token and access key management internal defs
2 * 2 *
3 * Copyright (C) 2003-5, 2007 Red Hat, Inc. Al !! 3 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.c 4 * Written by David Howells (dhowells@redhat.com)
5 * 5 *
6 * This program is free software; you can redi 6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Genera 7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundatio 8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any l 9 * 2 of the License, or (at your option) any later version.
10 */ 10 */
11 11
12 #ifndef _INTERNAL_H 12 #ifndef _INTERNAL_H
13 #define _INTERNAL_H 13 #define _INTERNAL_H
14 14
15 #include <linux/key-type.h> !! 15 #include <linux/key.h>
16 #include <linux/key-ui.h> 16 #include <linux/key-ui.h>
17 17
18 static inline __attribute__((format(printf, 1, !! 18 extern struct key_type key_type_dead;
19 void no_printk(const char *fmt, ...) <<
20 { <<
21 } <<
22 <<
23 #ifdef __KDEBUG <<
24 #define kenter(FMT, ...) \ <<
25 printk(KERN_DEBUG "==> %s("FMT")\n", _ <<
26 #define kleave(FMT, ...) \ <<
27 printk(KERN_DEBUG "<== %s()"FMT"\n", _ <<
28 #define kdebug(FMT, ...) \ <<
29 printk(KERN_DEBUG "xxx" FMT"yyy\n", ## <<
30 #else <<
31 #define kenter(FMT, ...) \ <<
32 no_printk(KERN_DEBUG "==> %s("FMT")\n" <<
33 #define kleave(FMT, ...) \ <<
34 no_printk(KERN_DEBUG "<== %s()"FMT"\n" <<
35 #define kdebug(FMT, ...) \ <<
36 no_printk(KERN_DEBUG FMT"\n", ##__VA_A <<
37 #endif <<
38 <<
39 extern struct key_type key_type_user; 19 extern struct key_type key_type_user;
40 20
41 /********************************************* 21 /*****************************************************************************/
42 /* 22 /*
43 * keep track of keys for a user 23 * keep track of keys for a user
44 * - this needs to be separate to user_struct 24 * - this needs to be separate to user_struct to avoid a refcount-loop
45 * (user_struct pins some keyrings which pin 25 * (user_struct pins some keyrings which pin this struct)
46 * - this also keeps track of keys under reque 26 * - this also keeps track of keys under request from userspace for this UID
47 */ 27 */
48 struct key_user { 28 struct key_user {
49 struct rb_node node; 29 struct rb_node node;
50 struct mutex cons_lock; !! 30 struct list_head consq; /* construction queue */
51 spinlock_t lock; 31 spinlock_t lock;
52 atomic_t usage; 32 atomic_t usage; /* for accessing qnkeys & qnbytes */
53 atomic_t nkeys; 33 atomic_t nkeys; /* number of keys */
54 atomic_t nikeys; 34 atomic_t nikeys; /* number of instantiated keys */
55 uid_t uid; 35 uid_t uid;
56 int qnkeys; 36 int qnkeys; /* number of keys allocated to this user */
57 int qnbytes; 37 int qnbytes; /* number of bytes allocated to this user */
58 }; 38 };
59 39
60 #define KEYQUOTA_MAX_KEYS 100 40 #define KEYQUOTA_MAX_KEYS 100
61 #define KEYQUOTA_MAX_BYTES 10000 41 #define KEYQUOTA_MAX_BYTES 10000
62 #define KEYQUOTA_LINK_BYTES 4 42 #define KEYQUOTA_LINK_BYTES 4 /* a link in a keyring is worth 4 bytes */
63 43
64 extern struct rb_root key_user_tree; 44 extern struct rb_root key_user_tree;
65 extern spinlock_t key_user_lock; 45 extern spinlock_t key_user_lock;
66 extern struct key_user root_key_user; 46 extern struct key_user root_key_user;
67 47
68 extern struct key_user *key_user_lookup(uid_t 48 extern struct key_user *key_user_lookup(uid_t uid);
69 extern void key_user_put(struct key_user *user 49 extern void key_user_put(struct key_user *user);
70 50
71 51
72 52
73 extern struct rb_root key_serial_tree; 53 extern struct rb_root key_serial_tree;
74 extern spinlock_t key_serial_lock; 54 extern spinlock_t key_serial_lock;
75 extern struct semaphore key_alloc_sem; 55 extern struct semaphore key_alloc_sem;
76 extern struct mutex key_construction_mutex; !! 56 extern struct rw_semaphore key_construction_sem;
77 extern wait_queue_head_t request_key_conswq; 57 extern wait_queue_head_t request_key_conswq;
78 58
79 59
80 extern void keyring_publish_name(struct key *k 60 extern void keyring_publish_name(struct key *keyring);
81 61
82 extern int __key_link(struct key *keyring, str 62 extern int __key_link(struct key *keyring, struct key *key);
83 63
84 extern key_ref_t __keyring_search_one(key_ref_ !! 64 extern struct key *__keyring_search_one(struct key *keyring,
85 const st !! 65 const struct key_type *type,
86 const ch !! 66 const char *description,
87 key_perm !! 67 key_perm_t perm);
88 <<
89 extern struct key *keyring_search_instkey(stru <<
90 key_ <<
91 68
92 typedef int (*key_match_func_t)(const struct k 69 typedef int (*key_match_func_t)(const struct key *, const void *);
93 70
94 extern key_ref_t keyring_search_aux(key_ref_t !! 71 extern struct key *keyring_search_aux(struct key *keyring,
95 struct tas !! 72 struct key_type *type,
96 struct key !! 73 const void *description,
97 const void !! 74 key_match_func_t match);
98 key_match_ !! 75
99 !! 76 extern struct key *search_process_keyrings_aux(struct key_type *type,
100 extern key_ref_t search_process_keyrings(struc !! 77 const void *description,
101 const !! 78 key_match_func_t match);
102 key_m <<
103 struc <<
104 79
105 extern struct key *find_keyring_by_name(const 80 extern struct key *find_keyring_by_name(const char *name, key_serial_t bound);
106 81
107 extern int install_thread_keyring(struct task_ 82 extern int install_thread_keyring(struct task_struct *tsk);
108 extern int install_process_keyring(struct task <<
109 <<
110 extern struct key *request_key_and_link(struct <<
111 const <<
112 const <<
113 void * <<
114 struct <<
115 unsign <<
116 <<
117 /* <<
118 * request_key authorisation <<
119 */ <<
120 struct request_key_auth { <<
121 struct key *target_key; <<
122 struct task_struct *context; <<
123 char *callout_info; <<
124 pid_t pid; <<
125 }; <<
126 <<
127 extern struct key_type key_type_request_key_au <<
128 extern struct key *request_key_auth_new(struct <<
129 const <<
130 <<
131 extern struct key *key_get_instantiation_authk <<
132 83
133 /* 84 /*
134 * keyctl functions 85 * keyctl functions
135 */ 86 */
136 extern long keyctl_get_keyring_ID(key_serial_t 87 extern long keyctl_get_keyring_ID(key_serial_t, int);
137 extern long keyctl_join_session_keyring(const 88 extern long keyctl_join_session_keyring(const char __user *);
138 extern long keyctl_update_key(key_serial_t, co 89 extern long keyctl_update_key(key_serial_t, const void __user *, size_t);
139 extern long keyctl_revoke_key(key_serial_t); 90 extern long keyctl_revoke_key(key_serial_t);
140 extern long keyctl_keyring_clear(key_serial_t) 91 extern long keyctl_keyring_clear(key_serial_t);
141 extern long keyctl_keyring_link(key_serial_t, 92 extern long keyctl_keyring_link(key_serial_t, key_serial_t);
142 extern long keyctl_keyring_unlink(key_serial_t 93 extern long keyctl_keyring_unlink(key_serial_t, key_serial_t);
143 extern long keyctl_describe_key(key_serial_t, 94 extern long keyctl_describe_key(key_serial_t, char __user *, size_t);
144 extern long keyctl_keyring_search(key_serial_t 95 extern long keyctl_keyring_search(key_serial_t, const char __user *,
145 const char _ 96 const char __user *, key_serial_t);
146 extern long keyctl_read_key(key_serial_t, char 97 extern long keyctl_read_key(key_serial_t, char __user *, size_t);
147 extern long keyctl_chown_key(key_serial_t, uid 98 extern long keyctl_chown_key(key_serial_t, uid_t, gid_t);
148 extern long keyctl_setperm_key(key_serial_t, k 99 extern long keyctl_setperm_key(key_serial_t, key_perm_t);
149 extern long keyctl_instantiate_key(key_serial_ 100 extern long keyctl_instantiate_key(key_serial_t, const void __user *,
150 size_t, key 101 size_t, key_serial_t);
151 extern long keyctl_negate_key(key_serial_t, un 102 extern long keyctl_negate_key(key_serial_t, unsigned, key_serial_t);
152 extern long keyctl_set_reqkey_keyring(int); <<
153 extern long keyctl_set_timeout(key_serial_t, u <<
154 extern long keyctl_assume_authority(key_serial <<
155 103
156 104
157 /* 105 /*
158 * debugging key validation 106 * debugging key validation
159 */ 107 */
160 #ifdef KEY_DEBUGGING 108 #ifdef KEY_DEBUGGING
161 extern void __key_check(const struct key *); 109 extern void __key_check(const struct key *);
162 110
163 static inline void key_check(const struct key 111 static inline void key_check(const struct key *key)
164 { 112 {
165 if (key && (IS_ERR(key) || key->magic 113 if (key && (IS_ERR(key) || key->magic != KEY_DEBUG_MAGIC))
166 __key_check(key); 114 __key_check(key);
167 } 115 }
168 116
169 #else 117 #else
170 118
171 #define key_check(key) do {} while(0) 119 #define key_check(key) do {} while(0)
172 120
173 #endif 121 #endif
174 122
175 #endif /* _INTERNAL_H */ 123 #endif /* _INTERNAL_H */
176 124
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