3 Commits

Author	SHA1	Message	Date
Theodore Ts'o	a44cd7a054	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>	2015-05-01 16:56:50 -04:00
Theodore Ts'o	5de0b4d0cd	ext4 crypto: simplify and speed up filename encryption ... Avoid using SHA-1 when calculating the user-visible filename when the encryption key is available, and avoid decrypting lots of filenames when searching for a directory entry in a directory block. Change-Id: If4655f144784978ba0305b597bfa1c8d7bb69e63 Signed-off-by: Theodore Ts'o <tytso@mit.edu>	2015-05-01 16:56:45 -04:00
Michael Halcrow	d5d0e8c720	ext4 crypto: filename encryption facilities ... Signed-off-by: Uday Savagaonkar <savagaon@google.com> Signed-off-by: Ildar Muslukhov <ildarm@google.com> Signed-off-by: Michael Halcrow <mhalcrow@google.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>	2015-04-12 00:56:17 -04:00