12-18-2016
Hi Aia, that would also match 6 [Aa]'s or more. But OP in #4 is looking for matches of exactly six [Aa]'s. This approach would also match in the header and not just in the payload unlike the earlier suggestions and it does not find consecutive [Aa]'s that are on either side of a line wrap in the payload, nor would it find mixed case matches..
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LEARN ABOUT DEBIAN
keyctl_update
KEYCTL_UPDATE(3) Linux Key Management Calls KEYCTL_UPDATE(3)
NAME
keyctl_update - Update a key
SYNOPSIS
#include <keyutils.h>
long keyctl_update(key_serial_t key, const char *payload,
size_t plen);
DESCRIPTION
keyctl_update() updates the payload of a key if the key type permits it.
The caller must have write permission on a key to be able update it.
payload and plen specify the data for the new payload. payload may be NULL and plen may be zero if the key type permits that. The key
type may reject the data if it's in the wrong format or in some other way invalid.
RETURN VALUE
On success keyctl_update() returns 0. On error, the value -1 will be returned and errno will have been set to an appropriate error.
ERRORS
ENOKEY The key specified is invalid.
EKEYEXPIRED
The key specified has expired.
EKEYREVOKED
The key specified had been revoked.
EINVAL The payload data was invalid.
ENOMEM Insufficient memory to store the new payload.
EDQUOT The key quota for this user would be exceeded by increasing the size of the key to accommodate the new payload.
EACCES The key exists, but is not writable by the calling process.
EOPNOTSUPP
The key type does not support the update operation on its keys.
LINKING
This is a library function that can be found in libkeyutils. When linking, -lkeyutils should be specified to the linker.
SEE ALSO
keyctl(1),
add_key(2),
keyctl(2),
request_key(2),
keyctl_get_keyring_ID(3),
keyctl_join_session_keyring(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)
Linux 4 May 2006 KEYCTL_UPDATE(3)