aes.py 文件源码

def encryptData(self, encryptKey, privParameters, dataToEncrypt):
        if AES is None:
            raise error.StatusInformation(
                errorIndication=errind.encryptionError
            )

        snmpEngineBoots, snmpEngineTime, salt = privParameters

        # 3.3.1.1
        aesKey, iv, salt = self.__getEncryptionKey(
            encryptKey, snmpEngineBoots, snmpEngineTime
        )

        # 3.3.1.3
        aesObj = AES.new(aesKey, AES.MODE_CFB, iv, segment_size=128)

        # PyCrypto seems to require padding
        dataToEncrypt = dataToEncrypt + univ.OctetString((0,) * (16 - len(dataToEncrypt) % 16)).asOctets()

        ciphertext = aesObj.encrypt(dataToEncrypt)

        # 3.3.1.4
        return univ.OctetString(ciphertext), univ.OctetString(salt)

    # 3.2.4.2