lkml.org 
[lkml]   [2020]   [Jan]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Subject[PATCH v5 0/6] fscrypt preparations for encryption+casefolding
    Date
    This is a cleaned up and fixed 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 fixes a bug in UBIFS where it didn't gracefully handle invalid
    hash values in fscrypt no-key names. This is an existing bug, but the
    new fscrypt no-key name format (patch 6) made it much easier to trigger;
    it started being hit by 'kvm-xfstests -c ubifs -g encrypt'.

    Patch 5 updates UBIFS to make it ready for the new fscrypt no-key name
    format that always includes the dirhash.

    Patch 6 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.

    Changed v4 => v5:
    - Fixed UBIFS encryption to work with the new no-key name format.

    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 (3):
    fscrypt: clarify what is meant by a per-file key
    ubifs: don't trigger assertion on invalid no-key filename
    ubifs: allow both hash and disk name to be provided in no-key names

    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 +-
    fs/ubifs/dir.c | 6 +-
    fs/ubifs/journal.c | 4 +-
    fs/ubifs/key.h | 1 -
    include/linux/fscrypt.h | 94 +++-------
    13 files changed, 365 insertions(+), 178 deletions(-)

    --
    2.25.0

    \
     
     \ /
      Last update: 2020-01-20 23:35    [W:2.377 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site