Commit Graph

5 Commits

Author SHA1 Message Date
Jakob Unterwurzacher
902babdf22 Refactor ciphertext <-> plaintext offset translation functions
Move all the intelligence into the new file address_translation.go.
That the calculations were spread out too much became apparent when adding
the file header. This should make the code much easier to modify in the
future.
2015-11-01 12:11:36 +01:00
Jakob Unterwurzacher
76311b60f2 Add file header (on-disk-format change)
Format: [ "Version" uint16 big endian ] [ "Id" 16 random bytes ]

Quoting SECURITY.md:

* Every file has a header that contains a 16-byte random *file id*
* Each block uses the file id and its block number as GCM *authentication data*
 * This means the position of the blocks is protected as well. The blocks
   can not be reordered or copied between different files without
   causing an decryption error.
2015-11-01 01:38:27 +01:00
Jakob Unterwurzacher
89fef80d32 Run go fmt 2015-10-04 14:49:47 +02:00
Jakob Unterwurzacher
c859f0b2dc intraBlock: Rename Offset to Skip
"Offset" is unclear whether it is an offset from the start of file
or start of block. "Skip" seems much better.
2015-10-04 14:24:43 +02:00
Jakob Unterwurzacher
11fb037e7e Cleanup and rename files 2015-09-05 20:30:20 +02:00