From: Eric Biggers <ebiggers@kernel.org>
To: linux-fscrypt@vger.kernel.org
Cc: Daniel Rosenberg <drosen@google.com>,
kernel-team@android.com, linux-kernel@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net,
linux-fsdevel@vger.kernel.org, linux-ext4@vger.kernel.org,
Gabriel Krisman Bertazi <krisman@collabora.com>
Subject: [f2fs-dev] [PATCH v4 0/4] fscrypt preparations for encryption+casefolding
Date: Sun, 19 Jan 2020 20:43:57 -0800 [thread overview]
Message-ID: <20200120044401.325453-1-ebiggers@kernel.org> (raw)
This is a cleaned up version of the fscrypt patches to prepare for
directories that are both encrypted and casefolded.
Patches 1-3 start deriving a SipHash key for the new dirhash method that
will be used by encrypted+casefolded directories. To avoid unnecessary
overhead, we only do this if the directory is actually casefolded.
Patch 4 modifies the fscrypt no-key names to always include the dirhash,
since with the new dirhash method the dirhash will no longer be
computable from the ciphertext filename without the key. It also fixes
a longstanding issue where there could be collisions in the no-key
names, due to not using a proper cryptographic hash to abbreviate names.
For more information see the main patch series, which includes the
filesystem-specific changes:
https://lkml.kernel.org/linux-fscrypt/20200117214246.235591-1-drosen@google.com/T/#u
This applies to fscrypt.git#master.
Daniel Rosenberg (3):
fscrypt: don't allow v1 policies with casefolding
fscrypt: derive dirhash key for casefolded directories
fscrypt: improve format of no-key names
Eric Biggers (1):
fscrypt: clarify what is meant by a per-file key
Documentation/filesystems/fscrypt.rst | 40 +++--
fs/crypto/Kconfig | 1 +
fs/crypto/fname.c | 239 ++++++++++++++++++++------
fs/crypto/fscrypt_private.h | 19 +-
fs/crypto/hooks.c | 44 +++++
fs/crypto/keysetup.c | 81 ++++++---
fs/crypto/keysetup_v1.c | 4 +-
fs/crypto/policy.c | 7 +
fs/inode.c | 3 +-
include/linux/fscrypt.h | 94 +++-------
10 files changed, 360 insertions(+), 172 deletions(-)
base-commit: 2d8f7f119b0b2ce5e7ff0e8024b0763bf42b99c9
--
2.25.0
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next reply other threads:[~2020-01-20 4:49 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-20 4:43 Eric Biggers [this message]
2020-01-20 4:43 ` [f2fs-dev] [PATCH v4 1/4] fscrypt: don't allow v1 policies with casefolding Eric Biggers
2020-01-20 4:43 ` [f2fs-dev] [PATCH v4 2/4] fscrypt: derive dirhash key for casefolded directories Eric Biggers
2020-01-20 4:44 ` [f2fs-dev] [PATCH v4 3/4] fscrypt: clarify what is meant by a per-file key Eric Biggers
2020-01-20 4:44 ` [f2fs-dev] [PATCH v4 4/4] fscrypt: improve format of no-key names Eric Biggers
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