diff options
| author | Jakob Unterwurzacher | 2015-10-06 22:27:37 +0200 |
|---|---|---|
| committer | Jakob Unterwurzacher | 2015-10-06 22:27:37 +0200 |
| commit | a3d286069f989dd16c6f91930a0df9fedfa2dd64 (patch) | |
| tree | f4f27e09c63b5d777b14fa448c149f0132fffbae /pathfs_frontend/file.go | |
| parent | 45ea8aa5463942b0b777fcc0b354cef5821c908d (diff) | |
Use block number as authentication data
Diffstat (limited to 'pathfs_frontend/file.go')
| -rw-r--r-- | pathfs_frontend/file.go | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/pathfs_frontend/file.go b/pathfs_frontend/file.go index 7f5cc90..3304267 100644 --- a/pathfs_frontend/file.go +++ b/pathfs_frontend/file.go @@ -80,13 +80,12 @@ func (f *file) doRead(off uint64, length uint64) ([]byte, fuse.Status) { } // Truncate ciphertext buffer down to actually read bytes ciphertext = ciphertext[0:n] - { - blockNo := alignedOffset / f.cfs.CipherBS() - cryptfs.Debug.Printf("ReadAt offset=%d bytes (%d blocks), want=%d, got=%d\n", alignedOffset, blockNo, alignedLength, n) - } + + blockNo := alignedOffset / f.cfs.CipherBS() + cryptfs.Debug.Printf("ReadAt offset=%d bytes (%d blocks), want=%d, got=%d\n", alignedOffset, blockNo, alignedLength, n) // Decrypt it - plaintext, err := f.cfs.DecryptBlocks(ciphertext) + plaintext, err := f.cfs.DecryptBlocks(ciphertext, blockNo) if err != nil { blockNo := (alignedOffset + uint64(len(plaintext))) / f.cfs.PlainBS() cipherOff := blockNo * f.cfs.CipherBS() @@ -159,7 +158,7 @@ func (f *file) doWrite(data []byte, off int64) (uint32, fuse.Status) { // Write blockOffset, _ := b.CiphertextRange() - blockData = f.cfs.EncryptBlock(blockData) + blockData = f.cfs.EncryptBlock(blockData, b.BlockNo) cryptfs.Debug.Printf("ino%d: Writing %d bytes to block #%d, md5=%s\n", f.ino, len(blockData), b.BlockNo, cryptfs.Debug.Md5sum(blockData)) if len(blockData) != int(f.cfs.CipherBS()) { cryptfs.Debug.Printf("ino%d: Writing partial block #%d (%d bytes)\n", f.ino, b.BlockNo, len(blockData)) |