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Nathan Huckleberry 6b2a51ff03 fscrypt: Add HCTR2 support for filename encryption
HCTR2 is a tweakable, length-preserving encryption mode that is intended
for use on CPUs with dedicated crypto instructions.  HCTR2 has the
property that a bitflip in the plaintext changes the entire ciphertext.
This property fixes a known weakness with filename encryption: when two
filenames in the same directory share a prefix of >= 16 bytes, with
AES-CTS-CBC their encrypted filenames share a common substring, leaking
information.  HCTR2 does not have this problem.

More information on HCTR2 can be found here: "Length-preserving
encryption with HCTR2": https://eprint.iacr.org/2021/1441.pdf

Signed-off-by: Nathan Huckleberry <nhuck@google.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2022-06-10 16:40:18 +08:00
Documentation fscrypt: Add HCTR2 support for filename encryption 2022-06-10 16:40:18 +08:00
LICENSES
arch crypto: arm64/polyval - Add PMULL accelerated implementation of POLYVAL 2022-06-10 16:40:18 +08:00
block
certs
crypto crypto: x86/polyval - Add PCLMULQDQ accelerated implementation of POLYVAL 2022-06-10 16:40:17 +08:00
drivers crypto: atmel-ecc - Remove duplicated error reporting in .remove() 2022-06-10 16:40:16 +08:00
fs fscrypt: Add HCTR2 support for filename encryption 2022-06-10 16:40:18 +08:00
include fscrypt: Add HCTR2 support for filename encryption 2022-06-10 16:40:18 +08:00
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Makefile Linux 5.19-rc1 2022-06-05 17:18:54 -07:00
README

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.