des3.py 文件源码

def encryptData(self, encryptKey, privParameters, dataToEncrypt):
        if DES3 is None:
            raise error.StatusInformation(
                errorIndication=errind.encryptionError
            )

        snmpEngineBoots, snmpEngineTime, salt = privParameters

        des3Key, salt, iv = self.__getEncryptionKey(
            encryptKey, snmpEngineBoots
        )

        des3Obj = DES3.new(des3Key, DES3.MODE_CBC, iv)

        privParameters = univ.OctetString(salt)

        plaintext = dataToEncrypt + univ.OctetString((0,) * (8 - len(dataToEncrypt) % 8)).asOctets()
        ciphertext = des3Obj.encrypt(plaintext)

        return univ.OctetString(ciphertext), privParameters

    # 5.1.1.3