Rename nametransform, contentenc source files

Let's have shorter names, and merge *_api.go into the "main"
file.

No code changes.

internal/contentenc/content.go

@@ -8,9 +8,42 @@ import (
 	"encoding/hex"
 	"errors"
 
+	"github.com/rfjakob/gocryptfs/internal/cryptocore"
 	"github.com/rfjakob/gocryptfs/internal/tlog"
 )
 
+const (
+	// Default plaintext block size
+	DefaultBS = 4096
+)
+
+type ContentEnc struct {
+	// Cryptographic primitives
+	cryptoCore *cryptocore.CryptoCore
+	// Plaintext block size
+	plainBS uint64
+	// Ciphertext block size
+	cipherBS uint64
+	// All-zero block of size cipherBS, for fast compares
+	allZeroBlock []byte
+}
+
+func New(cc *cryptocore.CryptoCore, plainBS uint64) *ContentEnc {
+
+	cipherBS := plainBS + uint64(cc.IVLen) + cryptocore.AuthTagLen
+
+	return &ContentEnc{
+		cryptoCore:   cc,
+		plainBS:      plainBS,
+		cipherBS:     cipherBS,
+		allZeroBlock: make([]byte, cipherBS),
+	}
+}
+
+func (be *ContentEnc) PlainBS() uint64 {
+	return be.plainBS
+}
+
 // DecryptBlocks - Decrypt a number of blocks
 func (be *ContentEnc) DecryptBlocks(ciphertext []byte, firstBlockNo uint64, fileId []byte) ([]byte, error) {
 	cBuf := bytes.NewBuffer(ciphertext)

internal/contentenc/content_api.go

@@ -1,35 +0,0 @@
-package contentenc
-
-import "github.com/rfjakob/gocryptfs/internal/cryptocore"
-
-const (
-	// Default plaintext block size
-	DefaultBS = 4096
-)
-
-type ContentEnc struct {
-	// Cryptographic primitives
-	cryptoCore *cryptocore.CryptoCore
-	// Plaintext block size
-	plainBS uint64
-	// Ciphertext block size
-	cipherBS uint64
-	// All-zero block of size cipherBS, for fast compares
-	allZeroBlock []byte
-}
-
-func New(cc *cryptocore.CryptoCore, plainBS uint64) *ContentEnc {
-
-	cipherBS := plainBS + uint64(cc.IVLen) + cryptocore.AuthTagLen
-
-	return &ContentEnc{
-		cryptoCore:   cc,
-		plainBS:      plainBS,
-		cipherBS:     cipherBS,
-		allZeroBlock: make([]byte, cipherBS),
-	}
-}
-
-func (be *ContentEnc) PlainBS() uint64 {
-	return be.plainBS
-}

internal/nametransform/name_api.go

@@ -1,18 +0,0 @@
-package nametransform
-
-import "github.com/rfjakob/gocryptfs/internal/cryptocore"
-
-type NameTransform struct {
-	cryptoCore *cryptocore.CryptoCore
-	useEME     bool
-	longNames  bool
-	DirIVCache dirIVCache
-}
-
-func New(c *cryptocore.CryptoCore, useEME bool, longNames bool) *NameTransform {
-	return &NameTransform{
-		cryptoCore: c,
-		longNames:  longNames,
-		useEME:     useEME,
-	}
-}

internal/nametransform/names.go

@@ -9,10 +9,28 @@ import (
 	"fmt"
 
 	"github.com/rfjakob/eme"
+
+	"github.com/rfjakob/gocryptfs/internal/cryptocore"
 )
 
+type NameTransform struct {
+	cryptoCore *cryptocore.CryptoCore
+	useEME     bool
+	longNames  bool
+	DirIVCache dirIVCache
+}
+
+func New(c *cryptocore.CryptoCore, useEME bool, longNames bool) *NameTransform {
+	return &NameTransform{
+		cryptoCore: c,
+		longNames:  longNames,
+		useEME:     useEME,
+	}
+}
+
 // DecryptName - decrypt base64-encoded encrypted filename "cipherName"
-// The used encryption is either CBC or EME, depending on "useEME".
+// Used by DecryptPathDirIV().
+// The encryption is either CBC or EME, depending on "useEME".
 //
 // This function is exported because it allows for a very efficient readdir
 // implementation (read IV once, decrypt all names using this function).
@@ -43,11 +61,12 @@ func (n *NameTransform) DecryptName(cipherName string, iv []byte) (string, error
 	return plain, err
 }
 
-// encryptName - encrypt "plainName", return base64-encoded "cipherName64"
-// The used encryption is either CBC or EME, depending on "useEME".
+// encryptName - encrypt "plainName", return base64-encoded "cipherName64".
+// Used internally by EncryptPathDirIV().
+// The encryption is either CBC or EME, depending on "useEME".
 //
 // This function is exported because fusefrontend needs access to the full (not hashed)
-// name if longname is used
+// name if longname is used. Otherwise you should use EncryptPathDirIV()
 func (n *NameTransform) EncryptName(plainName string, iv []byte) (cipherName64 string) {
 
 	bin := []byte(plainName)