linux

iv/linux

History

Ondrej Kozina c538f6ec9f dm crypt: add ability to use keys from the kernel key retention service

The kernel key service is a generic way to store keys for the use of
other subsystems. Currently there is no way to use kernel keys in dm-crypt.
This patch aims to fix that. Instead of key userspace may pass a key
description with preceding ':'. So message that constructs encryption
mapping now looks like this:

  <cipher> [<key>|:<key_string>] <iv_offset> <dev_path> <start> [<#opt_params> <opt_params>]

where <key_string> is in format: <key_size>:<key_type>:<key_description>

Currently we only support two elementary key types: 'user' and 'logon'.
Keys may be loaded in dm-crypt either via <key_string> or using
classical method and pass the key in hex representation directly.

dm-crypt device initialised with a key passed in hex representation may be
replaced with key passed in key_string format and vice versa.

(Based on original work by Andrey Ryabinin)

Signed-off-by: Ondrej Kozina <okozina@redhat.com>
Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

2016-12-08 14:13:09 -05:00

cache-policies.txt

dm cache: update cache-policies.txt now that mq is an alias for smq

2016-05-05 15:25:53 -04:00

cache.txt

dm cache: display 'needs_check' in status if it is set

2015-07-16 10:23:50 -04:00

delay.txt

dm delay: document that offsets are specified in sectors

2015-10-31 19:06:05 -04:00

dm-crypt.txt

dm crypt: add ability to use keys from the kernel key retention service