code: def encrypt(pubkey, password):
      
      key = load_key(pubkey)
      encrypted_password = key.encrypt(password, PKCS1v15())
      return base64.b64encode(encrypted_password)
docs: Encrypt password using given RSA public key and encode it with base64.
  
      The encrypted password can only be decrypted by someone with the
      private key (in this case, only Travis).