adjust naming

Author: Dillon Streator

hmac.go

@@ -48,7 +48,7 @@ func (m *SigningMethodHMAC) Alg() string {
 // Verify implements token verification for the SigningMethod. Returns nil if the signature is valid.
 func (m *SigningMethodHMAC) Verify(signingString, signature string, key interface{}) error {
 	// Verify the key is the right type
-	keyBytes, err := bytesFrom(key)
+	keyBytes, err := m.keyBytesFrom(key)
 	if err != nil {
 		return err
 	}
@@ -80,7 +80,7 @@ func (m *SigningMethodHMAC) Verify(signingString, signature string, key interfac
 // Sign implements token signing for the SigningMethod.
 // Key must be []byte
 func (m *SigningMethodHMAC) Sign(signingString string, key interface{}) (string, error) {
-	keyBytes, err := bytesFrom(key)
+	keyBytes, err := m.keyBytesFrom(key)
 	if err != nil {
 		return "", err
 	}
@@ -95,7 +95,7 @@ func (m *SigningMethodHMAC) Sign(signingString string, key interface{}) (string,
 	return EncodeSegment(hasher.Sum(nil)), nil
 }
 
-func bytesFrom(value interface{}) ([]byte, error) {
+func (m *SigningMethodHMAC) keyBytesFrom(value interface{}) ([]byte, error) {
 	switch v := value.(type) {
 	case []byte:
 		return v, nil