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>
This commit is contained in:
Theodore Ts'o
2015-05-01 16:56:45 -04:00
parent 6ddb244784
commit 5de0b4d0cd
5 changed files with 154 additions and 209 deletions

View File

@@ -249,7 +249,7 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
} else {
/* Directory is encrypted */
err = ext4_fname_disk_to_usr(enc_ctx,
de, &fname_crypto_str);
NULL, de, &fname_crypto_str);
if (err < 0)
goto errout;
if (!dir_emit(ctx,