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-rw-r--r--cryptfs/intrablock.go51
1 files changed, 0 insertions, 51 deletions
diff --git a/cryptfs/intrablock.go b/cryptfs/intrablock.go
deleted file mode 100644
index faff471..0000000
--- a/cryptfs/intrablock.go
+++ /dev/null
@@ -1,51 +0,0 @@
-package cryptfs
-
-// intraBlock identifies a part of a file block
-type intraBlock struct {
- BlockNo uint64 // Block number in file
- Skip uint64 // Offset into block plaintext
- Length uint64 // Length of data from this block
- fs *CryptFS
-}
-
-// isPartial - is the block partial? This means we have to do read-modify-write.
-func (ib *intraBlock) IsPartial() bool {
- if ib.Skip > 0 || ib.Length < ib.fs.plainBS {
- return true
- }
- return false
-}
-
-// CiphertextRange - get byte range in ciphertext file corresponding to BlockNo
-// (complete block)
-func (ib *intraBlock) CiphertextRange() (offset uint64, length uint64) {
- return ib.fs.BlockNoToCipherOff(ib.BlockNo), ib.fs.cipherBS
-}
-
-// PlaintextRange - get byte range in plaintext corresponding to BlockNo
-// (complete block)
-func (ib *intraBlock) PlaintextRange() (offset uint64, length uint64) {
- return ib.fs.BlockNoToPlainOff(ib.BlockNo), ib.fs.plainBS
-}
-
-// CropBlock - crop a potentially larger plaintext block down to the relevant part
-func (ib *intraBlock) CropBlock(d []byte) []byte {
- lenHave := len(d)
- lenWant := int(ib.Skip + ib.Length)
- if lenHave < lenWant {
- return d[ib.Skip:lenHave]
- }
- return d[ib.Skip:lenWant]
-}
-
-// Ciphertext range corresponding to the sum of all "blocks" (complete blocks)
-func (ib *intraBlock) JointCiphertextRange(blocks []intraBlock) (offset uint64, length uint64) {
- firstBlock := blocks[0]
- lastBlock := blocks[len(blocks)-1]
-
- offset = ib.fs.BlockNoToCipherOff(firstBlock.BlockNo)
- offsetLast := ib.fs.BlockNoToCipherOff(lastBlock.BlockNo)
- length = offsetLast + ib.fs.cipherBS - offset
-
- return offset, length
-}