0.3.1

pkg/identity/identity.go

@@ -57,51 +57,6 @@ var (
 	ratchetPersistLock sync.Mutex
 )
 
-func encryptAESGCM(key, plaintext []byte) ([]byte, error) {
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		return nil, err
-	}
-
-	gcm, err := cipher.NewGCM(block)
-	if err != nil {
-		return nil, err
-	}
-
-	nonce := make([]byte, gcm.NonceSize())
-	if _, err := io.ReadFull(rand.Reader, nonce); err != nil {
-		return nil, err
-	}
-
-	ciphertext := gcm.Seal(nonce, nonce, plaintext, nil)
-	return ciphertext, nil
-}
-
-func decryptAESGCM(key, ciphertext []byte) ([]byte, error) {
-	block, err := aes.NewCipher(key)
-	if err != nil {
-		return nil, err
-	}
-
-	gcm, err := cipher.NewGCM(block)
-	if err != nil {
-		return nil, err
-	}
-
-	nonceSize := gcm.NonceSize()
-	if len(ciphertext) < nonceSize {
-		return nil, err
-	}
-
-	nonce, ciphertext := ciphertext[:nonceSize], ciphertext[nonceSize:]
-	plaintext, err := gcm.Open(nil, nonce, ciphertext, nil)
-	if err != nil {
-		return nil, err
-	}
-
-	return plaintext, nil
-}
-
 func encryptAESCBC(key, plaintext []byte) ([]byte, error) {
 	block, err := aes.NewCipher(key)
 	if err != nil {
@@ -412,20 +367,6 @@ func (i *Identity) GetCurrentRatchetKey() []byte {
 	return latestKey
 }
 
-func (i *Identity) EncryptSymmetric(plaintext []byte, key []byte) ([]byte, error) {
-	if len(key) != 32 {
-		return nil, errors.New("invalid key length")
-	}
-	return encryptAESGCM(key, plaintext)
-}
-
-func (i *Identity) DecryptSymmetric(ciphertext []byte, key []byte) ([]byte, error) {
-	if len(key) != 32 {
-		return nil, errors.New("invalid key length")
-	}
-	return decryptAESGCM(key, ciphertext)
-}
-
 func (i *Identity) Decrypt(ciphertextToken []byte, ratchets [][]byte, enforceRatchets bool, ratchetIDReceiver *common.RatchetIDReceiver) ([]byte, error) {
 	if i.privateKey == nil {
 		return nil, errors.New("decryption failed because identity does not hold a private key")