Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 334 insertions, 0 deletions

diff --git a/include/linux/key.h b/include/linux/key.h
new file mode 100644
index 00000000..96933b1e
--- /dev/null
+++ b/include/linux/key.h
@@ -0,0 +1,334 @@
+/* Authentication token and access key management
+ *
+ * Copyright (C) 2004, 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
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ *
+ * See Documentation/security/keys.txt for information on keys/keyrings.
+ */
+
+#ifndef _LINUX_KEY_H
+#define _LINUX_KEY_H
+
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/rbtree.h>
+#include <linux/rcupdate.h>
+#include <linux/sysctl.h>
+#include <linux/rwsem.h>
+#include <linux/atomic.h>
+
+#ifdef __KERNEL__
+
+/* key handle serial number */
+typedef int32_t key_serial_t;
+
+/* key handle permissions mask */
+typedef uint32_t key_perm_t;
+
+struct key;
+
+#ifdef CONFIG_KEYS
+
+#undef KEY_DEBUGGING
+
+#define KEY_POS_VIEW	0x01000000	/* possessor can view a key's attributes */
+#define KEY_POS_READ	0x02000000	/* possessor can read key payload / view keyring */
+#define KEY_POS_WRITE	0x04000000	/* possessor can update key payload / add link to keyring */
+#define KEY_POS_SEARCH	0x08000000	/* possessor can find a key in search / search a keyring */
+#define KEY_POS_LINK	0x10000000	/* possessor can create a link to a key/keyring */
+#define KEY_POS_SETATTR	0x20000000	/* possessor can set key attributes */
+#define KEY_POS_ALL	0x3f000000
+
+#define KEY_USR_VIEW	0x00010000	/* user permissions... */
+#define KEY_USR_READ	0x00020000
+#define KEY_USR_WRITE	0x00040000
+#define KEY_USR_SEARCH	0x00080000
+#define KEY_USR_LINK	0x00100000
+#define KEY_USR_SETATTR	0x00200000
+#define KEY_USR_ALL	0x003f0000
+
+#define KEY_GRP_VIEW	0x00000100	/* group permissions... */
+#define KEY_GRP_READ	0x00000200
+#define KEY_GRP_WRITE	0x00000400
+#define KEY_GRP_SEARCH	0x00000800
+#define KEY_GRP_LINK	0x00001000
+#define KEY_GRP_SETATTR	0x00002000
+#define KEY_GRP_ALL	0x00003f00
+
+#define KEY_OTH_VIEW	0x00000001	/* third party permissions... */
+#define KEY_OTH_READ	0x00000002
+#define KEY_OTH_WRITE	0x00000004
+#define KEY_OTH_SEARCH	0x00000008
+#define KEY_OTH_LINK	0x00000010
+#define KEY_OTH_SETATTR	0x00000020
+#define KEY_OTH_ALL	0x0000003f
+
+#define KEY_PERM_UNDEF	0xffffffff
+
+struct seq_file;
+struct user_struct;
+struct signal_struct;
+struct cred;
+
+struct key_type;
+struct key_owner;
+struct keyring_list;
+struct keyring_name;
+
+/*****************************************************************************/
+/*
+ * key reference with possession attribute handling
+ *
+ * NOTE! key_ref_t is a typedef'd pointer to a type that is not actually
+ * defined. This is because we abuse the bottom bit of the reference to carry a
+ * flag to indicate whether the calling process possesses that key in one of
+ * its keyrings.
+ *
+ * the key_ref_t has been made a separate type so that the compiler can reject
+ * attempts to dereference it without proper conversion.
+ *
+ * the three functions are used to assemble and disassemble references
+ */
+typedef struct __key_reference_with_attributes *key_ref_t;
+
+static inline key_ref_t make_key_ref(const struct key *key,
+				     unsigned long possession)
+{
+	return (key_ref_t) ((unsigned long) key | possession);
+}
+
+static inline struct key *key_ref_to_ptr(const key_ref_t key_ref)
+{
+	return (struct key *) ((unsigned long) key_ref & ~1UL);
+}
+
+static inline unsigned long is_key_possessed(const key_ref_t key_ref)
+{
+	return (unsigned long) key_ref & 1UL;
+}
+
+/*****************************************************************************/
+/*
+ * authentication token / access credential / keyring
+ * - types of key include:
+ *   - keyrings
+ *   - disk encryption IDs
+ *   - Kerberos TGTs and tickets
+ */
+struct key {
+	atomic_t		usage;		/* number of references */
+	key_serial_t		serial;		/* key serial number */
+	struct rb_node		serial_node;
+	struct key_type		*type;		/* type of key */
+	struct rw_semaphore	sem;		/* change vs change sem */
+	struct key_user		*user;		/* owner of this key */
+	void			*security;	/* security data for this key */
+	union {
+		time_t		expiry;		/* time at which key expires (or 0) */
+		time_t		revoked_at;	/* time at which key was revoked */
+	};
+	uid_t			uid;
+	gid_t			gid;
+	key_perm_t		perm;		/* access permissions */
+	unsigned short		quotalen;	/* length added to quota */
+	unsigned short		datalen;	/* payload data length
+						 * - may not match RCU dereferenced payload
+						 * - payload should contain own length
+						 */
+
+#ifdef KEY_DEBUGGING
+	unsigned		magic;
+#define KEY_DEBUG_MAGIC		0x18273645u
+#define KEY_DEBUG_MAGIC_X	0xf8e9dacbu
+#endif
+
+	unsigned long		flags;		/* status flags (change with bitops) */
+#define KEY_FLAG_INSTANTIATED	0	/* set if key has been instantiated */
+#define KEY_FLAG_DEAD		1	/* set if key type has been deleted */
+#define KEY_FLAG_REVOKED	2	/* set if key had been revoked */
+#define KEY_FLAG_IN_QUOTA	3	/* set if key consumes quota */
+#define KEY_FLAG_USER_CONSTRUCT	4	/* set if key is being constructed in userspace */
+#define KEY_FLAG_NEGATIVE	5	/* set if key is negative */
+#define KEY_FLAG_ROOT_CAN_CLEAR	6	/* set if key can be cleared by root without permission */
+
+	/* the description string
+	 * - this is used to match a key against search criteria
+	 * - this should be a printable string
+	 * - eg: for krb5 AFS, this might be "afs@REDHAT.COM"
+	 */
+	char			*description;
+
+	/* type specific data
+	 * - this is used by the keyring type to index the name
+	 */
+	union {
+		struct list_head	link;
+		unsigned long		x[2];
+		void			*p[2];
+		int			reject_error;
+	} type_data;
+
+	/* key data
+	 * - this is used to hold the data actually used in cryptography or
+	 *   whatever
+	 */
+	union {
+		unsigned long		value;
+		void __rcu		*rcudata;
+		void			*data;
+		struct keyring_list __rcu *subscriptions;
+	} payload;
+};
+
+extern struct key *key_alloc(struct key_type *type,
+			     const char *desc,
+			     uid_t uid, gid_t gid,
+			     const struct cred *cred,
+			     key_perm_t perm,
+			     unsigned long flags);
+
+
+#define KEY_ALLOC_IN_QUOTA	0x0000	/* add to quota, reject if would overrun */
+#define KEY_ALLOC_QUOTA_OVERRUN	0x0001	/* add to quota, permit even if overrun */
+#define KEY_ALLOC_NOT_IN_QUOTA	0x0002	/* not in quota */
+
+extern void key_revoke(struct key *key);
+extern void key_put(struct key *key);
+
+static inline struct key *key_get(struct key *key)
+{
+	if (key)
+		atomic_inc(&key->usage);
+	return key;
+}
+
+static inline void key_ref_put(key_ref_t key_ref)
+{
+	key_put(key_ref_to_ptr(key_ref));
+}
+
+extern struct key *request_key(struct key_type *type,
+			       const char *description,
+			       const char *callout_info);
+
+extern struct key *request_key_with_auxdata(struct key_type *type,
+					    const char *description,
+					    const void *callout_info,
+					    size_t callout_len,
+					    void *aux);
+
+extern struct key *request_key_async(struct key_type *type,
+				     const char *description,
+				     const void *callout_info,
+				     size_t callout_len);
+
+extern struct key *request_key_async_with_auxdata(struct key_type *type,
+						  const char *description,
+						  const void *callout_info,
+						  size_t callout_len,
+						  void *aux);
+
+extern int wait_for_key_construction(struct key *key, bool intr);
+
+extern int key_validate(struct key *key);
+
+extern key_ref_t key_create_or_update(key_ref_t keyring,
+				      const char *type,
+				      const char *description,
+				      const void *payload,
+				      size_t plen,
+				      key_perm_t perm,
+				      unsigned long flags);
+
+extern int key_update(key_ref_t key,
+		      const void *payload,
+		      size_t plen);
+
+extern int key_link(struct key *keyring,
+		    struct key *key);
+
+extern int key_unlink(struct key *keyring,
+		      struct key *key);
+
+extern struct key *keyring_alloc(const char *description, uid_t uid, gid_t gid,
+				 const struct cred *cred,
+				 unsigned long flags,
+				 struct key *dest);
+
+extern int keyring_clear(struct key *keyring);
+
+extern key_ref_t keyring_search(key_ref_t keyring,
+				struct key_type *type,
+				const char *description);
+
+extern int keyring_add_key(struct key *keyring,
+			   struct key *key);
+
+extern struct key *key_lookup(key_serial_t id);
+
+static inline key_serial_t key_serial(const struct key *key)
+{
+	return key ? key->serial : 0;
+}
+
+extern void key_set_timeout(struct key *, unsigned);
+
+/**
+ * key_is_instantiated - Determine if a key has been positively instantiated
+ * @key: The key to check.
+ *
+ * Return true if the specified key has been positively instantiated, false
+ * otherwise.
+ */
+static inline bool key_is_instantiated(const struct key *key)
+{
+	return test_bit(KEY_FLAG_INSTANTIATED, &key->flags) &&
+		!test_bit(KEY_FLAG_NEGATIVE, &key->flags);
+}
+
+#define rcu_dereference_key(KEY)					\
+	(rcu_dereference_protected((KEY)->payload.rcudata,		\
+				   rwsem_is_locked(&((struct key *)(KEY))->sem)))
+
+#define rcu_assign_keypointer(KEY, PAYLOAD)				\
+	(rcu_assign_pointer((KEY)->payload.rcudata, PAYLOAD))
+
+#ifdef CONFIG_SYSCTL
+extern ctl_table key_sysctls[];
+#endif
+
+extern void key_replace_session_keyring(void);
+
+/*
+ * the userspace interface
+ */
+extern int install_thread_keyring_to_cred(struct cred *cred);
+extern void key_fsuid_changed(struct task_struct *tsk);
+extern void key_fsgid_changed(struct task_struct *tsk);
+extern void key_init(void);
+
+#else /* CONFIG_KEYS */
+
+#define key_validate(k)			0
+#define key_serial(k)			0
+#define key_get(k) 			({ NULL; })
+#define key_revoke(k)			do { } while(0)
+#define key_put(k)			do { } while(0)
+#define key_ref_put(k)			do { } while(0)
+#define make_key_ref(k, p)		NULL
+#define key_ref_to_ptr(k)		NULL
+#define is_key_possessed(k)		0
+#define key_fsuid_changed(t)		do { } while(0)
+#define key_fsgid_changed(t)		do { } while(0)
+#define key_init()			do { } while(0)
+#define key_replace_session_keyring()	do { } while(0)
+
+#endif /* CONFIG_KEYS */
+#endif /* __KERNEL__ */
+#endif /* _LINUX_KEY_H */