加密解密aes

AESSECRET = $setting['aes']['secret']
AESIV = $setting['aes']['iv']
def self.token_for id, user_id
    jwt_encrypt = JWT.encode({user_id: user_id.to_s}, id.to_s)
    cipher = OpenSSL::Cipher::AES.new(256, :CBC)
    cipher.encrypt
    cipher.key = AESSECRET
    cipher.iv = AESIV
    aes_encrypt = cipher.update(jwt_encrypt) + cipher.final
    aes_encrypt = aes_encrypt.force_encoding('utf-8')
    aes_encrypt = Base64.encode64(aes_encrypt).encode('utf-8')
    return aes_encrypt
  end

  def self.decrypt token, id
    aes_encrypt = Base64.decode64(token)
    decipher = OpenSSL::Cipher::AES.new(256, :CBC)
    decipher.decrypt
    decipher.key = AESSECRET
    decipher.iv = AESIV
    plain = decipher.update(aes_encrypt) + decipher.final
    token_hash = JWT.decode(plain, id.to_s)
    return token_hash[0]["user_id"].to_i
  end