Since java treats the byte type as signed when used as an array index it
is possible for values >= 128 to cause ArrayIndexOutOfBoundsException.
Fix handling in EncFSBase64.decodeEncfs() to not crash with such bad
input.
This commit implements support for externalIvChaining in
EncFSInputStream and EncFSOutputStream which causes a file's volume path
to change the initialization vector (IV) which is used for encrypting
and decrypting the file contents.
EncFSLocalFileProvider.delete() was only deleting a directory if it was
completely empty. It is more functional to just recursively delete
everything under a directory if its not empty.
* EncFSFileInputStream now extends FilterInputStream
* EncFSFileOutputStream now extends FilterOutputStream
* EncFSInputStream now extends FilterInputStream
EncFSOutputStream was already using FilterOutputStream.
Unfortunate to have to do this, but with the new version of git diff
explicitly showing CRLF as ^M this was starting to get annoying. We
shall use Unix newline style in encfs-java going forward.
BoxCryptor uses an unencrypted name algorithm to encrypt file contents
without encrypting filenames. This change implements this algorithm
and adds a unit test. Thanks 1jr for requesting this and providing
test cases.
Also added a volume integration test for this algorithm.
uniqueIV just generates a bunch of random bytes in the file header so
we can use fileProvider.copy() which is more efficient for most file
providers rather than doing a full stream read/write copy.
With network based file providers it is possible for the input stream's
read() function to return before reading a full block. The current code
treated such partial reads incorrectly by using stream decoding to
decode them. Fix is to keep reading until we either read a full block
or we hit the end of the input stream.
Unfortunately some network storage systems such as Dropbox require
length of the file before opening an upload request so we need to
plumb file length all throughout the OutputStream creation. It is
optional for EncFSLocalFileProvider, but it is good practice to
supply this parameter whenever possible.
copyPath() movePath() and deletePath() now take an optional
EncFSProgressListener in order to post progress events. This is useful
for displaying progress of long running operations.
Stream name decoding with chained name IV was broken because chained
name IV computation was unconditionally padding each path element
whereas that should only be done for block name I/O algorithm. Fix
uses each path element as is for chained IV computation with stream
name algorithm.
Also added an integration test case containing a volume created with
encfs 1.7.4 that uses stream name algorithm and chained name IV
with a directory and a test file in that directory to exercise the
path that fails without this commit.
Previous implementation didn't work if dstPath was an existing
directory, fix the implementation to move srcPath under dstPath
if dstPath exists and is a directory.
