1 files changed, 0 insertions, 226 deletions
diff --git a/cryptfs/cryptfile.go b/cryptfs/cryptfile.go
deleted file mode 100644
index e5e9462..0000000
--- a/cryptfs/cryptfile.go
+++ /dev/null
@@ -1,226 +0,0 @@
-package cryptfs
-
-import (
-	//"fmt"
-	"os"
-	//"io"
-	"errors"
-	"crypto/cipher"
-)
-
-type CryptFile struct {
-	file *os.File
-	gcm cipher.AEAD
-}
-
-// decryptBlock - Verify and decrypt GCM block
-func (be *CryptFS) DecryptBlock(ciphertext []byte) ([]byte, error) {
-
-	// Empty block?
-	if len(ciphertext) == 0 {
-		return ciphertext, nil
-	}
-
-	if len(ciphertext) < NONCE_LEN {
-		warn.Printf("decryptBlock: Block is too short: %d bytes\n", len(ciphertext))
-		return nil, errors.New("Block is too short")
-	}
-
-	// Extract nonce
-	nonce := ciphertext[:NONCE_LEN]
-	ciphertext = ciphertext[NONCE_LEN:]
-
-	// Decrypt
-	var plaintext []byte
-	plaintext, err := be.gcm.Open(plaintext, nonce, ciphertext, nil)
-	if err != nil {
-		return nil, err
-	}
-
-	return plaintext, nil
-}
-
-// encryptBlock - Encrypt and add MAC using GCM
-func (be *CryptFS) EncryptBlock(plaintext []byte) []byte {
-
-	// Empty block?
-	if len(plaintext) == 0 {
-		return plaintext
-	}
-
-	// Get fresh nonce
-	nonce := gcmNonce.Get()
-
-	// Encrypt plaintext and append to nonce
-	ciphertext := be.gcm.Seal(nonce, nonce, plaintext, nil)
-
-	return ciphertext
-}
-
-/*
-// readCipherBlock - Read ciphertext block number "blockNo", decrypt,
-// return plaintext
-func (be *CryptFile) readCipherBlock(blockNo int64) ([]byte, error) {
-	off := blockNo * int64(be.cipherBS)
-	buf := make([]byte, be.cipherBS)
-
-	readN, err := be.file.ReadAt(buf, off)
-
-	if err != nil && err != io.EOF {
-		return nil, err
-	}
-
-	// Truncate buffer to actually read bytes
-	buf = buf[:readN]
-
-	// Empty block?
-	if len(buf) == 0 {
-		return buf, nil
-	}
-
-	if len(buf) < NONCE_LEN {
-		warn.Printf("readCipherBlock: Block is too short: %d bytes\n", len(buf))
-		return nil, errors.New("Block is too short")
-	}
-
-	// Extract nonce
-	nonce := buf[:NONCE_LEN]
-	buf = buf[NONCE_LEN:]
-
-	// Decrypt
-	var plainBuf []byte
-	plainBuf, err = be.gcm.Open(plainBuf, nonce, buf, nil)
-	if err != nil {
-		fmt.Printf("gcm.Open() failed: %d\n", err)
-		return nil, err
-	}
-
-	return plainBuf, nil
-}
-*/
-
-// intraBlock identifies a part of a file block
-type intraBlock struct {
-	BlockNo uint64  // Block number in file
-	Offset  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.Offset > 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.BlockNo * ib.fs.cipherBS, ib.fs.cipherBS
-}
-
-// PlaintextRange - get byte range in plaintext corresponding to BlockNo
-// (complete block)
-func (ib *intraBlock) PlaintextRange() (offset uint64, length uint64) {
-	return ib.BlockNo * ib.fs.plainBS, 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.Offset+ib.Length)
-	if lenHave < lenWant {
-		return d[ib.Offset:lenHave]
-	}
-	return d[ib.Offset:lenWant]
-}
-
-// Split a plaintext byte range into (possible partial) blocks
-func (be *CryptFS) SplitRange(offset uint64, length uint64) []intraBlock {
-	var b intraBlock
-	var parts []intraBlock
-
-	b.fs = be
-
-	for length > 0 {
-		b.BlockNo = offset / be.plainBS
-		b.Offset = offset % be.plainBS
-		b.Length = be.minu64(length, be.plainBS - b.Offset)
-		parts = append(parts, b)
-		offset += b.Length
-		length -= b.Length
-	}
-	return parts
-}
-
-func (be *CryptFS) minu64(x uint64, y uint64) uint64 {
-	if x < y {
-		return x
-	}
-	return y
-}
-
-/*
-// writeCipherBlock - Encrypt plaintext and write it to file block "blockNo"
-func (be *CryptFile) writeCipherBlock(blockNo int64, plain []byte) error {
-
-	if int64(len(plain)) > be.plainBS {
-		panic("writeCipherBlock: Cannot write block that is larger than plainBS")
-	}
-
-	// Get fresh nonce
-	nonce := gcmNonce.Get()
-	// Encrypt data and append to nonce
-	cipherBuf := be.gcm.Seal(nonce, nonce, plain, nil)
-
-	// WriteAt retries short writes autmatically
-	written, err := be.file.WriteAt(cipherBuf, blockNo * be.cipherBS)
-
-	debug.Printf("writeCipherBlock: wrote %d ciphertext bytes to block %d\n",
-		written, blockNo)
-
-	return err
-}
-
-// Perform RMW cycle on block
-// Write "data" into file location specified in "b"
-func (be *CryptFile) rmwWrite(b intraBlock, data []byte, f *os.File) error {
-	if b.Length != uint64(len(data)) {
-		panic("Length mismatch")
-	}
-
-	oldBlock, err := be.readCipherBlock(b.BlockNo)
-	if err != nil {
-		return err
-	}
-	newBlockLen := b.Offset + b.Length
-	debug.Printf("newBlockLen := %d + %d\n", b.Offset, b.Length)
-	var newBlock []byte
-
-	// Write goes beyond the old block and grows the file?
-	// Must create a bigger newBlock
-	if newBlockLen > uint64(len(oldBlock)) {
-		newBlock = make([]byte, newBlockLen)
-	} else {
-		newBlock = make([]byte, len(oldBlock))
-	}
-
-	// Fill with old data
-	copy(newBlock, oldBlock)
-	// Then overwrite the relevant parts with new data
-	copy(newBlock[b.Offset:b.Offset + b.Length], data)
-
-	// Actual write
-	err = be.writeCipherBlock(b.BlockNo, newBlock)
-
-	if err != nil {
-		// An incomplete write to a ciphertext block means that the whole block
-		// is destroyed.
-		fmt.Printf("rmwWrite: Write error: %s\n", err)
-	}
-
-	return err
-}
-*/