Function Decrypt

tools/security/encrypt.go:42–62

Decrypt decrypts encrypted text with key (must be valid 32 chars AES key). This method uses AES-256-GCM block cypher mode.

(cipherText string, key string)

//
// This method uses AES-256-GCM block cypher mode.
func Decrypt(cipherText string, key string) ([]byte, error) {
	block, err := aes.NewCipher([]byte(key))
	if err != nil {
		return nil, err
	}

	gcm, err := cipher.NewGCM(block)
	if err != nil {
		return nil, err
	}

	nonceSize := gcm.NonceSize()

	cipherByte, err := base64.StdEncoding.DecodeString(cipherText)
	if err != nil {
		return nil, err
	}

	nonce, cipherByteClean := cipherByte[:nonceSize], cipherByte[nonceSize:]
	return gcm.Open(nil, nonce, cipherByteClean, nil)
}