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