Such as topic, my client end is written in c + +, nodejs listening, the client will end after a string of hamc encryption password (password is garbled) through the socket communication (TCP) connections to nodejs, nodejs again to c + + to write the server, the server to decrypt again, but always decryption failure, to print the hexadecimal found on the password and nodejs on the client is not the same, but normal English strings can transport the past