Major refactoring: Split up "cryptfs" into several internal packages

"git status" for reference:

deleted:    cryptfs/cryptfs.go
deleted:    cryptfs/names_core.go
modified:   integration_tests/cli_test.go
modified:   integration_tests/helpers.go
renamed:    cryptfs/config_file.go -> internal/configfile/config_file.go
renamed:    cryptfs/config_test.go -> internal/configfile/config_test.go
renamed:    cryptfs/config_test/.gitignore -> internal/configfile/config_test/.gitignore
renamed:    cryptfs/config_test/PlaintextNames.conf -> internal/configfile/config_test/PlaintextNames.conf
renamed:    cryptfs/config_test/StrangeFeature.conf -> internal/configfile/config_test/StrangeFeature.conf
renamed:    cryptfs/config_test/v1.conf -> internal/configfile/config_test/v1.conf
renamed:    cryptfs/config_test/v2.conf -> internal/configfile/config_test/v2.conf
renamed:    cryptfs/kdf.go -> internal/configfile/kdf.go
renamed:    cryptfs/kdf_test.go -> internal/configfile/kdf_test.go
renamed:    cryptfs/cryptfs_content.go -> internal/contentenc/content.go
new file:   internal/contentenc/content_api.go
renamed:    cryptfs/content_test.go -> internal/contentenc/content_test.go
renamed:    cryptfs/file_header.go -> internal/contentenc/file_header.go
renamed:    cryptfs/intrablock.go -> internal/contentenc/intrablock.go
renamed:    cryptfs/address_translation.go -> internal/contentenc/offsets.go
new file:   internal/cryptocore/crypto_api.go
renamed:    cryptfs/gcm_go1.4.go -> internal/cryptocore/gcm_go1.4.go
renamed:    cryptfs/gcm_go1.5.go -> internal/cryptocore/gcm_go1.5.go
renamed:    cryptfs/nonce.go -> internal/cryptocore/nonce.go
renamed:    cryptfs/openssl_aead.go -> internal/cryptocore/openssl_aead.go
renamed:    cryptfs/openssl_benchmark.bash -> internal/cryptocore/openssl_benchmark.bash
renamed:    cryptfs/openssl_test.go -> internal/cryptocore/openssl_test.go
new file:   internal/nametransform/name_api.go
new file:   internal/nametransform/names_core.go
renamed:    cryptfs/names_diriv.go -> internal/nametransform/names_diriv.go
renamed:    cryptfs/names_noiv.go -> internal/nametransform/names_noiv.go
renamed:    cryptfs/names_test.go -> internal/nametransform/names_test.go
new file:   internal/nametransform/pad16.go
renamed:    cryptfs/log.go -> internal/toggledlog/log.go
renamed:    cryptfs/log_go1.4.go -> internal/toggledlog/log_go1.4.go
renamed:    cryptfs/log_go1.5.go -> internal/toggledlog/log_go1.5.go
modified:   main.go
modified:   masterkey.go
modified:   pathfs_frontend/file.go
modified:   pathfs_frontend/file_holes.go
modified:   pathfs_frontend/fs.go
modified:   pathfs_frontend/fs_dir.go
modified:   pathfs_frontend/names.go
modified:   test.bash

1 files changed, 0 insertions, 89 deletions

diff --git a/cryptfs/address_translation.go b/cryptfs/address_translation.go
deleted file mode 100644
index b21cfc7..0000000
--- a/cryptfs/address_translation.go
+++ /dev/null
@@ -1,89 +0,0 @@
-package cryptfs
-
-// CryptFS methods that translate offsets between ciphertext and plaintext
-
-// get the block number at plain-text offset
-func (be *CryptFS) PlainOffToBlockNo(plainOffset uint64) uint64 {
-	return plainOffset / be.plainBS
-}
-
-// get the block number at ciphter-text offset
-func (be *CryptFS) CipherOffToBlockNo(cipherOffset uint64) uint64 {
-	return (cipherOffset - HEADER_LEN) / be.cipherBS
-}
-
-// get ciphertext offset of block "blockNo"
-func (be *CryptFS) BlockNoToCipherOff(blockNo uint64) uint64 {
-	return HEADER_LEN + blockNo*be.cipherBS
-}
-
-// get plaintext offset of block "blockNo"
-func (be *CryptFS) BlockNoToPlainOff(blockNo uint64) uint64 {
-	return blockNo * be.plainBS
-}
-
-// PlainSize - calculate plaintext size from ciphertext size
-func (be *CryptFS) CipherSizeToPlainSize(cipherSize uint64) uint64 {
-
-	// Zero sized files stay zero-sized
-	if cipherSize == 0 {
-		return 0
-	}
-
-	if cipherSize == HEADER_LEN {
-		Warn.Printf("cipherSize %d == header size: interrupted write?\n", cipherSize)
-		return 0
-	}
-
-	if cipherSize < HEADER_LEN {
-		Warn.Printf("cipherSize %d < header size: corrupt file\n", cipherSize)
-		return 0
-	}
-
-	// Block number at last byte
-	blockNo := be.CipherOffToBlockNo(cipherSize - 1)
-	blockCount := blockNo + 1
-
-	overhead := be.BlockOverhead()*blockCount + HEADER_LEN
-
-	return cipherSize - overhead
-}
-
-// CipherSize - calculate ciphertext size from plaintext size
-func (be *CryptFS) PlainSizeToCipherSize(plainSize uint64) uint64 {
-
-	// Block number at last byte
-	blockNo := be.PlainOffToBlockNo(plainSize - 1)
-	blockCount := blockNo + 1
-
-	overhead := be.BlockOverhead()*blockCount + HEADER_LEN
-
-	return plainSize + overhead
-}
-
-// Split a plaintext byte range into (possibly partial) blocks
-func (be *CryptFS) ExplodePlainRange(offset uint64, length uint64) []intraBlock {
-	var blocks []intraBlock
-	var nextBlock intraBlock
-	nextBlock.fs = be
-
-	for length > 0 {
-		nextBlock.BlockNo = be.PlainOffToBlockNo(offset)
-		nextBlock.Skip = offset - be.BlockNoToPlainOff(nextBlock.BlockNo)
-
-		// Minimum of remaining data and remaining space in the block
-		nextBlock.Length = MinUint64(length, be.plainBS-nextBlock.Skip)
-
-		blocks = append(blocks, nextBlock)
-		offset += nextBlock.Length
-		length -= nextBlock.Length
-	}
-	return blocks
-}
-
-func MinUint64(x uint64, y uint64) uint64 {
-	if x < y {
-		return x
-	}
-	return y
-}