/* internal.h: authentication token and access key management internal defs
*
- * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
+ * Copyright (C) 2003-5, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
#ifndef _INTERNAL_H
#define _INTERNAL_H
-#include <linux/key.h>
-#include <linux/key-ui.h>
+#include <linux/sched.h>
+#include <linux/key-type.h>
+
+static inline __attribute__((format(printf, 1, 2)))
+void no_printk(const char *fmt, ...)
+{
+}
+
+#ifdef __KDEBUG
+#define kenter(FMT, ...) \
+ printk(KERN_DEBUG "==> %s("FMT")\n", __func__, ##__VA_ARGS__)
+#define kleave(FMT, ...) \
+ printk(KERN_DEBUG "<== %s()"FMT"\n", __func__, ##__VA_ARGS__)
+#define kdebug(FMT, ...) \
+ printk(KERN_DEBUG " "FMT"\n", ##__VA_ARGS__)
+#else
+#define kenter(FMT, ...) \
+ no_printk(KERN_DEBUG "==> %s("FMT")\n", __func__, ##__VA_ARGS__)
+#define kleave(FMT, ...) \
+ no_printk(KERN_DEBUG "<== %s()"FMT"\n", __func__, ##__VA_ARGS__)
+#define kdebug(FMT, ...) \
+ no_printk(KERN_DEBUG FMT"\n", ##__VA_ARGS__)
+#endif
-extern struct key_type key_type_dead;
extern struct key_type key_type_user;
/*****************************************************************************/
*/
struct key_user {
struct rb_node node;
- struct list_head consq; /* construction queue */
+ struct mutex cons_lock; /* construction initiation lock */
spinlock_t lock;
atomic_t usage; /* for accessing qnkeys & qnbytes */
atomic_t nkeys; /* number of keys */
atomic_t nikeys; /* number of instantiated keys */
uid_t uid;
+ struct user_namespace *user_ns;
int qnkeys; /* number of keys allocated to this user */
int qnbytes; /* number of bytes allocated to this user */
};
-#define KEYQUOTA_MAX_KEYS 100
-#define KEYQUOTA_MAX_BYTES 10000
-#define KEYQUOTA_LINK_BYTES 4 /* a link in a keyring is worth 4 bytes */
-
extern struct rb_root key_user_tree;
extern spinlock_t key_user_lock;
extern struct key_user root_key_user;
-extern struct key_user *key_user_lookup(uid_t uid);
+extern struct key_user *key_user_lookup(uid_t uid,
+ struct user_namespace *user_ns);
extern void key_user_put(struct key_user *user);
+/*
+ * key quota limits
+ * - root has its own separate limits to everyone else
+ */
+extern unsigned key_quota_root_maxkeys;
+extern unsigned key_quota_root_maxbytes;
+extern unsigned key_quota_maxkeys;
+extern unsigned key_quota_maxbytes;
+
+#define KEYQUOTA_LINK_BYTES 4 /* a link in a keyring is worth 4 bytes */
extern struct rb_root key_serial_tree;
extern spinlock_t key_serial_lock;
-extern struct semaphore key_alloc_sem;
-extern struct rw_semaphore key_construction_sem;
+extern struct mutex key_construction_mutex;
extern wait_queue_head_t request_key_conswq;
-extern void keyring_publish_name(struct key *keyring);
+extern struct key_type *key_type_lookup(const char *type);
+extern void key_type_put(struct key_type *ktype);
extern int __key_link(struct key *keyring, struct key *key);
-extern struct key *__keyring_search_one(struct key *keyring,
- const struct key_type *type,
- const char *description,
- key_perm_t perm);
+extern key_ref_t __keyring_search_one(key_ref_t keyring_ref,
+ const struct key_type *type,
+ const char *description,
+ key_perm_t perm);
+
+extern struct key *keyring_search_instkey(struct key *keyring,
+ key_serial_t target_id);
typedef int (*key_match_func_t)(const struct key *, const void *);
-extern struct key *keyring_search_aux(struct key *keyring,
- struct key_type *type,
- const void *description,
- key_match_func_t match);
+extern key_ref_t keyring_search_aux(key_ref_t keyring_ref,
+ const struct cred *cred,
+ struct key_type *type,
+ const void *description,
+ key_match_func_t match);
+
+extern key_ref_t search_process_keyrings(struct key_type *type,
+ const void *description,
+ key_match_func_t match,
+ const struct cred *cred);
-extern struct key *search_process_keyrings_aux(struct key_type *type,
- const void *description,
- key_match_func_t match);
+extern struct key *find_keyring_by_name(const char *name, bool skip_perm_check);
-extern struct key *find_keyring_by_name(const char *name, key_serial_t bound);
+extern int install_user_keyrings(void);
+extern int install_thread_keyring_to_cred(struct cred *);
+extern int install_process_keyring_to_cred(struct cred *);
+
+extern struct key *request_key_and_link(struct key_type *type,
+ const char *description,
+ const void *callout_info,
+ size_t callout_len,
+ void *aux,
+ struct key *dest_keyring,
+ unsigned long flags);
-extern int install_thread_keyring(struct task_struct *tsk);
+extern key_ref_t lookup_user_key(key_serial_t id, unsigned long flags,
+ key_perm_t perm);
+#define KEY_LOOKUP_CREATE 0x01
+#define KEY_LOOKUP_PARTIAL 0x02
+#define KEY_LOOKUP_FOR_UNLINK 0x04
+
+extern long join_session_keyring(const char *name);
+
+extern unsigned key_gc_delay;
+extern void keyring_gc(struct key *keyring, time_t limit);
+extern void key_schedule_gc(time_t expiry_at);
+
+/*
+ * check to see whether permission is granted to use a key in the desired way
+ */
+extern int key_task_permission(const key_ref_t key_ref,
+ const struct cred *cred,
+ key_perm_t perm);
+
+static inline int key_permission(const key_ref_t key_ref, key_perm_t perm)
+{
+ return key_task_permission(key_ref, current_cred(), perm);
+}
+
+/* required permissions */
+#define KEY_VIEW 0x01 /* require permission to view attributes */
+#define KEY_READ 0x02 /* require permission to read content */
+#define KEY_WRITE 0x04 /* require permission to update / modify */
+#define KEY_SEARCH 0x08 /* require permission to search (keyring) or find (key) */
+#define KEY_LINK 0x10 /* require permission to link */
+#define KEY_SETATTR 0x20 /* require permission to change attributes */
+#define KEY_ALL 0x3f /* all the above permissions */
+
+/*
+ * request_key authorisation
+ */
+struct request_key_auth {
+ struct key *target_key;
+ struct key *dest_keyring;
+ const struct cred *cred;
+ void *callout_info;
+ size_t callout_len;
+ pid_t pid;
+};
+
+extern struct key_type key_type_request_key_auth;
+extern struct key *request_key_auth_new(struct key *target,
+ const void *callout_info,
+ size_t callout_len,
+ struct key *dest_keyring);
+
+extern struct key *key_get_instantiation_authkey(key_serial_t target_id);
/*
* keyctl functions
extern long keyctl_instantiate_key(key_serial_t, const void __user *,
size_t, key_serial_t);
extern long keyctl_negate_key(key_serial_t, unsigned, key_serial_t);
-
+extern long keyctl_set_reqkey_keyring(int);
+extern long keyctl_set_timeout(key_serial_t, unsigned);
+extern long keyctl_assume_authority(key_serial_t);
+extern long keyctl_get_security(key_serial_t keyid, char __user *buffer,
+ size_t buflen);
+extern long keyctl_session_to_parent(void);
/*
* debugging key validation
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff