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author | Theodore Ts'o <tytso@mit.edu> | 2015-05-01 16:56:50 -0400 |
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committer | Theodore Ts'o <tytso@mit.edu> | 2015-05-01 16:56:50 -0400 |
commit | a44cd7a05496d60fd2ba8cca080e3db8f481549b (patch) | |
tree | dd8d05d845817e4a429804d8ffe09dd68b6881e6 /fs/ext4/ext4.h | |
parent | 5de0b4d0cd153c471640b13aae6ae6d18d0a4603 (diff) | |
download | linux-a44cd7a05496d60fd2ba8cca080e3db8f481549b.tar.bz2 |
ext4 crypto: add padding to filenames before encrypting
This obscures the length of the filenames, to decrease the amount of
information leakage. By default, we pad the filenames to the next 4
byte boundaries. This costs nothing, since the directory entries are
aligned to 4 byte boundaries anyway. Filenames can also be padded to
8, 16, or 32 bytes, which will consume more directory space.
Change-Id: Ibb7a0fb76d2c48e2061240a709358ff40b14f322
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/ext4.h')
-rw-r--r-- | fs/ext4/ext4.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index dfb113816672..bca1bdc67725 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -911,6 +911,7 @@ struct ext4_inode_info { /* on-disk additional length */ __u16 i_extra_isize; + char i_crypt_policy_flags; /* Indicate the inline data space. */ u16 i_inline_off; |