Manuel KEYCTL

keyctl

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Section: Linux Key Management Calls (2)
Updated: 4 May 2006
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NAME

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keyctl - Manipulate the kernel's key management facility

SYNOPSIS

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#include <keyutils.h>

long keyctl(int cmd, ...);

DESCRIPTION

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keyctl() has a number of functions available:


KEYCTL_GET_KEYRING_ID: Ask for a keyring's ID.

KEYCTL_JOIN_SESSION_KEYRING: Join or start named session keyring.

KEYCTL_UPDATE: Update a key.

KEYCTL_REVOKE: Revoke a key.

KEYCTL_CHOWN: Set ownership of a key.

KEYCTL_SETPERM: Set perms on a key.

KEYCTL_DESCRIBE: Describe a key.

KEYCTL_CLEAR: Clear contents of a keyring.

KEYCTL_LINK: Link a key into a keyring.

KEYCTL_UNLINK: Unlink a key from a keyring.

KEYCTL_SEARCH: Search for a key in a keyring.

KEYCTL_READ: Read a key or keyring's contents.

KEYCTL_INSTANTIATE: Instantiate a partially constructed key.

KEYCTL_NEGATE: Negate a partially constructed key.

KEYCTL_SET_REQKEY_KEYRING: Set default request-key keyring.

KEYCTL_SET_TIMEOUT: Set timeout on a key.

KEYCTL_ASSUME_AUTHORITY: Assume authority to instantiate key.
These are wrapped by libkeyutils into individual functions to permit compiler the compiler to check types. See the See Also section at the bottom.

RETURN VALUE

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On success keyctl() returns the serial number of the key it found. On error, the value -1 will be returned and errno will have been set to an appropriate error.

ERRORS

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ENOKEY: No matching key was found or an invalid key was specified.

EKEYEXPIRED: An expired key was found or specified.

EKEYREVOKED: A revoked key was found or specified.

EKEYREJECTED: A rejected key was found or specified.

EDQUOT: The key quota for the caller's user would be exceeded by creating a key or linking it to the keyring.

EACCES: A key operation wasn't permitted.

LINKING

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Although this is a Linux system call, it is not present in libc but can be found rather in libkeyutils. When linking, -lkeyutils should be specified to the linker.

SEE ALSO

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keyctl(1),
add_key(2),
request_key(2),
keyctl_get_keyring_ID(3),
keyctl_join_session_keyring(3),
keyctl_update(3),
keyctl_revoke(3),
keyctl_chown(3),
keyctl_setperm(3),
keyctl_describe(3),
keyctl_clear(3),
keyctl_link(3),
keyctl_unlink(3),
keyctl_search(3),
keyctl_read(3),
keyctl_instantiate(3),
keyctl_negate(3),
keyctl_set_reqkey_keyring(3),
keyctl_set_timeout(3),
keyctl_assume_authority(3),
keyctl_describe_alloc(3),
keyctl_read_alloc(3),
request-key(8)

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NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
LINKING
SEE ALSO

Table des mots clés

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EACCES	ERRORS
EDQUOT	ERRORS
EKEYEXPIRED	ERRORS
EKEYREJECTED	ERRORS
EKEYREVOKED	ERRORS
ENOKEY	ERRORS
KEYCTL_ASSUME_AUTHORITY	DESCRIPTION
KEYCTL_CHOWN	DESCRIPTION
KEYCTL_CLEAR	DESCRIPTION
KEYCTL_DESCRIBE	DESCRIPTION
KEYCTL_GET_KEYRING_ID	DESCRIPTION
KEYCTL_INSTANTIATE	DESCRIPTION
KEYCTL_JOIN_SESSION_KEYRING	DESCRIPTION
KEYCTL_LINK	DESCRIPTION
KEYCTL_NEGATE	DESCRIPTION
KEYCTL_READ	DESCRIPTION
KEYCTL_REVOKE	DESCRIPTION
KEYCTL_SEARCH	DESCRIPTION
KEYCTL_SET_REQKEY_KEYRING	DESCRIPTION
KEYCTL_SET_TIMEOUT	DESCRIPTION
KEYCTL_SETPERM	DESCRIPTION
KEYCTL_UNLINK	DESCRIPTION
KEYCTL_UPDATE	DESCRIPTION

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