keyutils.h - linux/kernel/git/dhowells/keyutils - Git at Google

 /* keyutils.h: key utility library interface
  *
  * Copyright (C) 2005,2011 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 Lesser General Public License
  * as published by the Free Software Foundation; either version
  * 2 of the License, or (at your option) any later version.
  */

 #ifndef KEYUTILS_H
 #define KEYUTILS_H

 #include <sys/types.h>
 #include <stdint.h>

 extern const char keyutils_version_string[];
 extern const char keyutils_build_string[];

 /* key serial number */
 typedef int32_t key_serial_t;

 /* special process keyring shortcut IDs */
 #define KEY_SPEC_THREAD_KEYRING		-1	/* - key ID for thread-specific keyring */
 #define KEY_SPEC_PROCESS_KEYRING	-2	/* - key ID for process-specific keyring */
 #define KEY_SPEC_SESSION_KEYRING	-3	/* - key ID for session-specific keyring */
 #define KEY_SPEC_USER_KEYRING		-4	/* - key ID for UID-specific keyring */
 #define KEY_SPEC_USER_SESSION_KEYRING	-5	/* - key ID for UID-session keyring */
 #define KEY_SPEC_GROUP_KEYRING		-6	/* - key ID for GID-specific keyring */
 #define KEY_SPEC_REQKEY_AUTH_KEY	-7	/* - key ID for assumed request_key auth key */

 /* request-key default keyrings */
 #define KEY_REQKEY_DEFL_NO_CHANGE		-1
 #define KEY_REQKEY_DEFL_DEFAULT			0
 #define KEY_REQKEY_DEFL_THREAD_KEYRING		1
 #define KEY_REQKEY_DEFL_PROCESS_KEYRING		2
 #define KEY_REQKEY_DEFL_SESSION_KEYRING		3
 #define KEY_REQKEY_DEFL_USER_KEYRING		4
 #define KEY_REQKEY_DEFL_USER_SESSION_KEYRING	5
 #define KEY_REQKEY_DEFL_GROUP_KEYRING		6

 /* key handle permissions mask */
 typedef uint32_t key_perm_t;

 #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

 /* keyctl commands */
 #define KEYCTL_GET_KEYRING_ID		0	/* ask for a keyring's ID */
 #define KEYCTL_JOIN_SESSION_KEYRING	1	/* join or start named session keyring */
 #define KEYCTL_UPDATE			2	/* update a key */
 #define KEYCTL_REVOKE			3	/* revoke a key */
 #define KEYCTL_CHOWN			4	/* set ownership of a key */
 #define KEYCTL_SETPERM			5	/* set perms on a key */
 #define KEYCTL_DESCRIBE			6	/* describe a key */
 #define KEYCTL_CLEAR			7	/* clear contents of a keyring */
 #define KEYCTL_LINK			8	/* link a key into a keyring */
 #define KEYCTL_UNLINK			9	/* unlink a key from a keyring */
 #define KEYCTL_SEARCH			10	/* search for a key in a keyring */
 #define KEYCTL_READ			11	/* read a key or keyring's contents */
 #define KEYCTL_INSTANTIATE		12	/* instantiate a partially constructed key */
 #define KEYCTL_NEGATE			13	/* negate a partially constructed key */
 #define KEYCTL_SET_REQKEY_KEYRING	14	/* set default request-key keyring */
 #define KEYCTL_SET_TIMEOUT		15	/* set timeout on a key */
 #define KEYCTL_ASSUME_AUTHORITY		16	/* assume authority to instantiate key */
 #define KEYCTL_GET_SECURITY		17	/* get key security label */
 #define KEYCTL_SESSION_TO_PARENT	18	/* set my session keyring on my parent process */
 #define KEYCTL_REJECT			19	/* reject a partially constructed key */
 #define KEYCTL_INSTANTIATE_IOV		20	/* instantiate a partially constructed key */
 #define KEYCTL_INVALIDATE		21	/* invalidate a key */
 #define KEYCTL_GET_PERSISTENT		22	/* get a user's persistent keyring */
 #define KEYCTL_DH_COMPUTE		23	/* Compute Diffie-Hellman values */
 #define KEYCTL_PKEY_QUERY		24	/* Query public key parameters */
 #define KEYCTL_PKEY_ENCRYPT		25	/* Encrypt a blob using a public key */
 #define KEYCTL_PKEY_DECRYPT		26	/* Decrypt a blob using a public key */
 #define KEYCTL_PKEY_SIGN		27	/* Create a public key signature */
 #define KEYCTL_PKEY_VERIFY		28	/* Verify a public key signature */
 #define KEYCTL_RESTRICT_KEYRING		29	/* Restrict keys allowed to link to a keyring */
 #define KEYCTL_MOVE			30	/* Move keys between keyrings */
 #define KEYCTL_CAPABILITIES		31	/* Find capabilities of keyrings subsystem */

 /* keyctl structures */
 struct keyctl_dh_params {
 	key_serial_t priv;
 	key_serial_t prime;
 	key_serial_t base;
 };

 struct keyctl_kdf_params {
 	char *hashname;
 	char *otherinfo;
 	uint32_t otherinfolen;
 	uint32_t __spare[8];
 };

 #define KEYCTL_SUPPORTS_ENCRYPT		0x01
 #define KEYCTL_SUPPORTS_DECRYPT		0x02
 #define KEYCTL_SUPPORTS_SIGN		0x04
 #define KEYCTL_SUPPORTS_VERIFY		0x08

 struct keyctl_pkey_query {
 	unsigned int	supported_ops;	/* Which ops are supported */
 	unsigned int	key_size;	/* Size of the key in bits */
 	unsigned short	max_data_size;	/* Maximum size of raw data to sign in bytes */
 	unsigned short	max_sig_size;	/* Maximum size of signature in bytes */
 	unsigned short	max_enc_size;	/* Maximum size of encrypted blob in bytes */
 	unsigned short	max_dec_size;	/* Maximum size of decrypted blob in bytes */
 	unsigned int	__spare[10];
 };

 struct keyctl_pkey_params {
 	key_serial_t	key_id;		/* Serial no. of public key to use */
 	unsigned int	in_len;		/* Input data size */
 	union {
 		unsigned int	out_len; /* Output buffer size (encrypt/decrypt/sign) */
 		unsigned int	in2_len; /* Second input data size (verify) */
 	};
 	unsigned int	__spare[7];
 };

 #define KEYCTL_MOVE_EXCL	0x00000001 /* Do not displace from the to-keyring */

 /*
  * Capabilities flags.  The capabilities list is an array of 8-bit integers;
  * each integer can carry up to 8 flags.
  */
 #define KEYCTL_CAPS0_CAPABILITIES	0x01 /* KEYCTL_CAPABILITIES supported */
 #define KEYCTL_CAPS0_PERSISTENT_KEYRINGS 0x02 /* Persistent keyrings enabled */
 #define KEYCTL_CAPS0_DIFFIE_HELLMAN	0x04 /* Diffie-Hellman ops enabled */
 #define KEYCTL_CAPS0_PUBLIC_KEY		0x08 /* Public key ops enabled */
 #define KEYCTL_CAPS0_BIG_KEY		0x10 /* big_key-type enabled */
 #define KEYCTL_CAPS0_INVALIDATE		0x20 /* KEYCTL_INVALIDATE supported */
 #define KEYCTL_CAPS0_RESTRICT_KEYRING	0x40 /* KEYCTL_RESTRICT_KEYRING supported */
 #define KEYCTL_CAPS0_MOVE		0x80 /* KEYCTL_MOVE supported */
 #define KEYCTL_CAPS1_NS_KEYRING_NAME	0x01 /* Keyring names are per-user_namespace */
 #define KEYCTL_CAPS1_NS_KEY_TAG		0x02 /* Key indexing can include a namespace tag */

 /*
  * syscall wrappers
  */
 extern key_serial_t add_key(const char *type,
 			    const char *description,
 			    const void *payload,
 			    size_t plen,
 			    key_serial_t ringid);

 extern key_serial_t request_key(const char *type,
 				const char *description,
 				const char *callout_info,
 				key_serial_t destringid);

 extern long keyctl(int cmd, ...);

 /*
  * keyctl function wrappers
  */
 extern key_serial_t keyctl_get_keyring_ID(key_serial_t id, int create);
 extern key_serial_t keyctl_join_session_keyring(const char *name);
 extern long keyctl_update(key_serial_t id, const void *payload, size_t plen);
 extern long keyctl_revoke(key_serial_t id);
 extern long keyctl_chown(key_serial_t id, uid_t uid, gid_t gid);
 extern long keyctl_setperm(key_serial_t id, key_perm_t perm);
 extern long keyctl_describe(key_serial_t id, char *buffer, size_t buflen);
 extern long keyctl_clear(key_serial_t ringid);
 extern long keyctl_link(key_serial_t id, key_serial_t ringid);
 extern long keyctl_unlink(key_serial_t id, key_serial_t ringid);
 extern long keyctl_search(key_serial_t ringid,
 			  const char *type,
 			  const char *description,
 			  key_serial_t destringid);
 extern long keyctl_read(key_serial_t id, char *buffer, size_t buflen);
 extern long keyctl_instantiate(key_serial_t id,
 			       const void *payload,
 			       size_t plen,
 			       key_serial_t ringid);
 extern long keyctl_negate(key_serial_t id, unsigned timeout, key_serial_t ringid);
 extern long keyctl_set_reqkey_keyring(int reqkey_defl);
 extern long keyctl_set_timeout(key_serial_t key, unsigned timeout);
 extern long keyctl_assume_authority(key_serial_t key);
 extern long keyctl_get_security(key_serial_t key, char *buffer, size_t buflen);
 extern long keyctl_session_to_parent(void);
 extern long keyctl_reject(key_serial_t id, unsigned timeout, unsigned error,
 			  key_serial_t ringid);
 struct iovec;
 extern long keyctl_instantiate_iov(key_serial_t id,
 				   const struct iovec *payload_iov,
 				   unsigned ioc,
 				   key_serial_t ringid);
 extern long keyctl_invalidate(key_serial_t id);
 extern long keyctl_get_persistent(uid_t uid, key_serial_t id);
 extern long keyctl_dh_compute(key_serial_t priv, key_serial_t prime,
 			      key_serial_t base, char *buffer, size_t buflen);
 extern long keyctl_dh_compute_kdf(key_serial_t private, key_serial_t prime,
 				  key_serial_t base, char *hashname,
 				  char *otherinfo, size_t otherinfolen,
 				  char *buffer, size_t buflen);
 extern long keyctl_restrict_keyring(key_serial_t keyring, const char *type,
 				    const char *restriction);

 extern long keyctl_pkey_query(key_serial_t key_id,
 			      const char *info,
 			      struct keyctl_pkey_query *result);
 extern long keyctl_pkey_encrypt(key_serial_t key_id,
 				const char *info,
 				const void *data, size_t data_len,
 				void *enc, size_t enc_len);
 extern long keyctl_pkey_decrypt(key_serial_t key_id,
 				const char *info,
 				const void *enc, size_t enc_len,
 				void *data, size_t data_len);
 extern long keyctl_pkey_sign(key_serial_t key_id,
 			     const char *info,
 			     const void *data, size_t data_len,
 			     void *sig, size_t sig_len);
 extern long keyctl_pkey_verify(key_serial_t key_id,
 			       const char *info,
 			       const void *data, size_t data_len,
 			       const void *sig, size_t sig_len);
 extern long keyctl_move(key_serial_t id,
 			key_serial_t from_ringid,
 			key_serial_t to_ringid,
 			unsigned int flags);
 extern long keyctl_capabilities(unsigned char *buffer, size_t buflen);

 /*
  * utilities
  */
 extern int keyctl_describe_alloc(key_serial_t id, char **_buffer);
 extern int keyctl_read_alloc(key_serial_t id, void **_buffer);
 extern int keyctl_get_security_alloc(key_serial_t id, char **_buffer);
 extern int keyctl_dh_compute_alloc(key_serial_t priv, key_serial_t prime,
 				   key_serial_t base, void **_buffer);

 typedef int (*recursive_key_scanner_t)(key_serial_t parent, key_serial_t key,
 				       char *desc, int desc_len, void *data);
 extern int recursive_key_scan(key_serial_t key, recursive_key_scanner_t func, void *data);
 extern int recursive_session_key_scan(recursive_key_scanner_t func, void *data);
 extern key_serial_t find_key_by_type_and_desc(const char *type, const char *desc,
 					      key_serial_t destringid);

 #endif /* KEYUTILS_H */
	/* keyutils.h: key utility library interface
	*
	* Copyright (C) 2005,2011 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 Lesser General Public License
	* as published by the Free Software Foundation; either version
	* 2 of the License, or (at your option) any later version.
	*/

	#ifndef KEYUTILS_H
	#define KEYUTILS_H

	#include <sys/types.h>
	#include <stdint.h>

	extern const char keyutils_version_string[];
	extern const char keyutils_build_string[];

	/* key serial number */
	typedef int32_t key_serial_t;

	/* special process keyring shortcut IDs */
	#define KEY_SPEC_THREAD_KEYRING -1 /* - key ID for thread-specific keyring */
	#define KEY_SPEC_PROCESS_KEYRING -2 /* - key ID for process-specific keyring */
	#define KEY_SPEC_SESSION_KEYRING -3 /* - key ID for session-specific keyring */
	#define KEY_SPEC_USER_KEYRING -4 /* - key ID for UID-specific keyring */
	#define KEY_SPEC_USER_SESSION_KEYRING -5 /* - key ID for UID-session keyring */
	#define KEY_SPEC_GROUP_KEYRING -6 /* - key ID for GID-specific keyring */
	#define KEY_SPEC_REQKEY_AUTH_KEY -7 /* - key ID for assumed request_key auth key */

	/* request-key default keyrings */
	#define KEY_REQKEY_DEFL_NO_CHANGE -1
	#define KEY_REQKEY_DEFL_DEFAULT 0
	#define KEY_REQKEY_DEFL_THREAD_KEYRING 1
	#define KEY_REQKEY_DEFL_PROCESS_KEYRING 2
	#define KEY_REQKEY_DEFL_SESSION_KEYRING 3
	#define KEY_REQKEY_DEFL_USER_KEYRING 4
	#define KEY_REQKEY_DEFL_USER_SESSION_KEYRING 5
	#define KEY_REQKEY_DEFL_GROUP_KEYRING 6

	/* key handle permissions mask */
	typedef uint32_t key_perm_t;

	#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

	/* keyctl commands */
	#define KEYCTL_GET_KEYRING_ID 0 /* ask for a keyring's ID */
	#define KEYCTL_JOIN_SESSION_KEYRING 1 /* join or start named session keyring */
	#define KEYCTL_UPDATE 2 /* update a key */
	#define KEYCTL_REVOKE 3 /* revoke a key */
	#define KEYCTL_CHOWN 4 /* set ownership of a key */
	#define KEYCTL_SETPERM 5 /* set perms on a key */
	#define KEYCTL_DESCRIBE 6 /* describe a key */
	#define KEYCTL_CLEAR 7 /* clear contents of a keyring */
	#define KEYCTL_LINK 8 /* link a key into a keyring */
	#define KEYCTL_UNLINK 9 /* unlink a key from a keyring */
	#define KEYCTL_SEARCH 10 /* search for a key in a keyring */
	#define KEYCTL_READ 11 /* read a key or keyring's contents */
	#define KEYCTL_INSTANTIATE 12 /* instantiate a partially constructed key */
	#define KEYCTL_NEGATE 13 /* negate a partially constructed key */
	#define KEYCTL_SET_REQKEY_KEYRING 14 /* set default request-key keyring */
	#define KEYCTL_SET_TIMEOUT 15 /* set timeout on a key */
	#define KEYCTL_ASSUME_AUTHORITY 16 /* assume authority to instantiate key */
	#define KEYCTL_GET_SECURITY 17 /* get key security label */
	#define KEYCTL_SESSION_TO_PARENT 18 /* set my session keyring on my parent process */
	#define KEYCTL_REJECT 19 /* reject a partially constructed key */
	#define KEYCTL_INSTANTIATE_IOV 20 /* instantiate a partially constructed key */
	#define KEYCTL_INVALIDATE 21 /* invalidate a key */
	#define KEYCTL_GET_PERSISTENT 22 /* get a user's persistent keyring */
	#define KEYCTL_DH_COMPUTE 23 /* Compute Diffie-Hellman values */
	#define KEYCTL_PKEY_QUERY 24 /* Query public key parameters */
	#define KEYCTL_PKEY_ENCRYPT 25 /* Encrypt a blob using a public key */
	#define KEYCTL_PKEY_DECRYPT 26 /* Decrypt a blob using a public key */
	#define KEYCTL_PKEY_SIGN 27 /* Create a public key signature */
	#define KEYCTL_PKEY_VERIFY 28 /* Verify a public key signature */
	#define KEYCTL_RESTRICT_KEYRING 29 /* Restrict keys allowed to link to a keyring */
	#define KEYCTL_MOVE 30 /* Move keys between keyrings */
	#define KEYCTL_CAPABILITIES 31 /* Find capabilities of keyrings subsystem */

	/* keyctl structures */
	struct keyctl_dh_params {
	key_serial_t priv;
	key_serial_t prime;
	key_serial_t base;
	};

	struct keyctl_kdf_params {
	char *hashname;
	char *otherinfo;
	uint32_t otherinfolen;
	uint32_t __spare[8];
	};

	#define KEYCTL_SUPPORTS_ENCRYPT 0x01
	#define KEYCTL_SUPPORTS_DECRYPT 0x02
	#define KEYCTL_SUPPORTS_SIGN 0x04
	#define KEYCTL_SUPPORTS_VERIFY 0x08

	struct keyctl_pkey_query {
	unsigned int supported_ops; /* Which ops are supported */
	unsigned int key_size; /* Size of the key in bits */
	unsigned short max_data_size; /* Maximum size of raw data to sign in bytes */
	unsigned short max_sig_size; /* Maximum size of signature in bytes */
	unsigned short max_enc_size; /* Maximum size of encrypted blob in bytes */
	unsigned short max_dec_size; /* Maximum size of decrypted blob in bytes */
	unsigned int __spare[10];
	};

	struct keyctl_pkey_params {
	key_serial_t key_id; /* Serial no. of public key to use */
	unsigned int in_len; /* Input data size */
	union {
	unsigned int out_len; /* Output buffer size (encrypt/decrypt/sign) */
	unsigned int in2_len; /* Second input data size (verify) */
	};
	unsigned int __spare[7];
	};

	#define KEYCTL_MOVE_EXCL 0x00000001 /* Do not displace from the to-keyring */

	/*
	* Capabilities flags. The capabilities list is an array of 8-bit integers;
	* each integer can carry up to 8 flags.
	*/
	#define KEYCTL_CAPS0_CAPABILITIES 0x01 /* KEYCTL_CAPABILITIES supported */
	#define KEYCTL_CAPS0_PERSISTENT_KEYRINGS 0x02 /* Persistent keyrings enabled */
	#define KEYCTL_CAPS0_DIFFIE_HELLMAN 0x04 /* Diffie-Hellman ops enabled */
	#define KEYCTL_CAPS0_PUBLIC_KEY 0x08 /* Public key ops enabled */
	#define KEYCTL_CAPS0_BIG_KEY 0x10 /* big_key-type enabled */
	#define KEYCTL_CAPS0_INVALIDATE 0x20 /* KEYCTL_INVALIDATE supported */
	#define KEYCTL_CAPS0_RESTRICT_KEYRING 0x40 /* KEYCTL_RESTRICT_KEYRING supported */
	#define KEYCTL_CAPS0_MOVE 0x80 /* KEYCTL_MOVE supported */
	#define KEYCTL_CAPS1_NS_KEYRING_NAME 0x01 /* Keyring names are per-user_namespace */
	#define KEYCTL_CAPS1_NS_KEY_TAG 0x02 /* Key indexing can include a namespace tag */

	/*
	* syscall wrappers
	*/
	extern key_serial_t add_key(const char *type,
	const char *description,
	const void *payload,
	size_t plen,
	key_serial_t ringid);

	extern key_serial_t request_key(const char *type,
	const char *description,
	const char *callout_info,
	key_serial_t destringid);

	extern long keyctl(int cmd, ...);

	/*
	* keyctl function wrappers
	*/
	extern key_serial_t keyctl_get_keyring_ID(key_serial_t id, int create);
	extern key_serial_t keyctl_join_session_keyring(const char *name);
	extern long keyctl_update(key_serial_t id, const void *payload, size_t plen);
	extern long keyctl_revoke(key_serial_t id);
	extern long keyctl_chown(key_serial_t id, uid_t uid, gid_t gid);
	extern long keyctl_setperm(key_serial_t id, key_perm_t perm);
	extern long keyctl_describe(key_serial_t id, char *buffer, size_t buflen);
	extern long keyctl_clear(key_serial_t ringid);
	extern long keyctl_link(key_serial_t id, key_serial_t ringid);
	extern long keyctl_unlink(key_serial_t id, key_serial_t ringid);
	extern long keyctl_search(key_serial_t ringid,
	const char *type,
	const char *description,
	key_serial_t destringid);
	extern long keyctl_read(key_serial_t id, char *buffer, size_t buflen);
	extern long keyctl_instantiate(key_serial_t id,
	const void *payload,
	size_t plen,
	key_serial_t ringid);
	extern long keyctl_negate(key_serial_t id, unsigned timeout, key_serial_t ringid);
	extern long keyctl_set_reqkey_keyring(int reqkey_defl);
	extern long keyctl_set_timeout(key_serial_t key, unsigned timeout);
	extern long keyctl_assume_authority(key_serial_t key);
	extern long keyctl_get_security(key_serial_t key, char *buffer, size_t buflen);
	extern long keyctl_session_to_parent(void);
	extern long keyctl_reject(key_serial_t id, unsigned timeout, unsigned error,
	key_serial_t ringid);
	struct iovec;
	extern long keyctl_instantiate_iov(key_serial_t id,
	const struct iovec *payload_iov,
	unsigned ioc,
	key_serial_t ringid);
	extern long keyctl_invalidate(key_serial_t id);
	extern long keyctl_get_persistent(uid_t uid, key_serial_t id);
	extern long keyctl_dh_compute(key_serial_t priv, key_serial_t prime,
	key_serial_t base, char *buffer, size_t buflen);
	extern long keyctl_dh_compute_kdf(key_serial_t private, key_serial_t prime,
	key_serial_t base, char *hashname,
	char *otherinfo, size_t otherinfolen,
	char *buffer, size_t buflen);
	extern long keyctl_restrict_keyring(key_serial_t keyring, const char *type,
	const char *restriction);

	extern long keyctl_pkey_query(key_serial_t key_id,
	const char *info,
	struct keyctl_pkey_query *result);
	extern long keyctl_pkey_encrypt(key_serial_t key_id,
	const char *info,
	const void *data, size_t data_len,
	void *enc, size_t enc_len);
	extern long keyctl_pkey_decrypt(key_serial_t key_id,
	const char *info,
	const void *enc, size_t enc_len,
	void *data, size_t data_len);
	extern long keyctl_pkey_sign(key_serial_t key_id,
	const char *info,
	const void *data, size_t data_len,
	void *sig, size_t sig_len);
	extern long keyctl_pkey_verify(key_serial_t key_id,
	const char *info,
	const void *data, size_t data_len,
	const void *sig, size_t sig_len);
	extern long keyctl_move(key_serial_t id,
	key_serial_t from_ringid,
	key_serial_t to_ringid,
	unsigned int flags);
	extern long keyctl_capabilities(unsigned char *buffer, size_t buflen);

	/*
	* utilities
	*/
	extern int keyctl_describe_alloc(key_serial_t id, char **_buffer);
	extern int keyctl_read_alloc(key_serial_t id, void **_buffer);
	extern int keyctl_get_security_alloc(key_serial_t id, char **_buffer);
	extern int keyctl_dh_compute_alloc(key_serial_t priv, key_serial_t prime,
	key_serial_t base, void **_buffer);

	typedef int (*recursive_key_scanner_t)(key_serial_t parent, key_serial_t key,
	char desc, int desc_len, void data);
	extern int recursive_key_scan(key_serial_t key, recursive_key_scanner_t func, void *data);
	extern int recursive_session_key_scan(recursive_key_scanner_t func, void *data);
	extern key_serial_t find_key_by_type_and_desc(const char type, const char desc,
	key_serial_t destringid);

	#endif /* KEYUTILS_H */