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Subject[PATCH 0/4][RFC v2] Introduce the in-kernel hibernation encryption
As security becomes more and more important, we add the in-kernel
encryption support for hibernation.

This prototype is a trial version to implement the hibernation
encryption in the kernel. This patch set is divided
into two parts:
1. The hibernation snapshot encryption in kernel space.
2. The key derivation implementation in user space.

The whole process is illustrated below:
1. install the kernel module:
modprobe crypto_hibernation
2. run the tool to generate the key from
user provided passphrase (salt has been read
from kernel).
3. launch the hibernation process, the kernel
uses the key in step 2 to encrypt the
hibernation snapshot.
4. resume the system and the initrd will
launch cryto_hibernate to read previous salt
from kernel and probe the user passphrase
and generate the same key.
5. kernel uses this key to decrypt the hibernation
snapshot and restore to previous system.

Chen Yu (4):
PM / Hibernate: Add helper functions for hibernation encryption
PM / hibernate: Install crypto hooks for hibernation encryption
PM / Hibernate: Encrypt the snapshot pages before submitted to the
block device
tools: create power/crypto utility

include/linux/suspend.h | 40 +++
kernel/power/Kconfig | 14 ++
kernel/power/Makefile | 1 +
kernel/power/crypto_hibernation.c | 421 +++++++++++++++++++++++++++++++
kernel/power/hibernate.c | 67 +++++
kernel/power/power.h | 67 +++++
kernel/power/swap.c | 182 +++++++++++++-
tools/power/crypto/Makefile | 24 ++
tools/power/crypto/crypto_hibernate.c | 462 ++++++++++++++++++++++++++++++++++
9 files changed, 1270 insertions(+), 8 deletions(-)
create mode 100644 kernel/power/crypto_hibernation.c
create mode 100644 tools/power/crypto/Makefile
create mode 100644 tools/power/crypto/crypto_hibernate.c


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