linux/Documentation/device-mapper
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 2016-12-08 14:13:09 -05:00
dm-flakey.txt block: rename bio bi_rw to bi_opf 2016-08-07 14:41:02 -06:00
dm-io.txt
dm-log.txt dm log userspace: fix comment hyphens 2011-10-31 20:21:22 +00:00
dm-queue-length.txt dm mpath: add queue length load balancer 2009-06-22 10:12:27 +01:00
dm-raid.txt dm raid: fix typos in Documentation/device-mapper/dm-raid.txt 2016-11-21 09:52:04 -05:00
dm-service-time.txt Fix common misspellings 2011-03-31 11:26:23 -03:00
dm-uevent.txt
era.txt dm: add era target 2014-03-27 16:56:23 -04:00
kcopyd.txt
linear.txt
log-writes.txt block, drivers, fs: rename REQ_FLUSH to REQ_PREFLUSH 2016-06-07 13:41:38 -06:00
persistent-data.txt Documentation: Fix multiple typo in Documentation 2012-03-07 16:08:24 +01:00
snapshot.txt dm snapshot: add new persistent store option to support overflow 2015-10-09 16:57:03 -04:00
statistics.txt dm stats: fix spelling mistake in Documentation 2016-05-05 15:25:54 -04:00
striped.txt dm stripe: support for non power of 2 chunksize 2012-07-27 15:08:01 +01:00
switch.txt dm switch: fix Documentation to use plain text 2015-03-31 12:03:49 -04:00
thin-provisioning.txt dm thin: display 'needs_check' in status if it is set 2015-07-16 10:23:50 -04:00
verity.txt dm verity: add ignore_zero_blocks feature 2015-12-10 10:39:03 -05:00
zero.txt