public override void HandleArFrame(Frames.MaslArFrame arFrame)
{
var expectedDir = MaslFrameDirection.Server2Client;
if (arFrame.Direction != expectedDir)
{
throw new DirectionFlagException(expectedDir);
}
// 收到AR，关闭握手计时器。
this.Context.StopHandshakeTimer();
// 验证MAC
var actualMac = arFrame.MAC;
var expectedMac = this.Context.AuMessageMacCalculator.CalcArMAC(arFrame, this.Context.RsspEP.LocalID);
if (!ArrayHelper.Equals(expectedMac, actualMac))
{
throw new MacInArException(string.Format("Ar消息Mac检验失败，期望值={0}，实际值={1}",
HelperTools.ConvertToString(expectedMac),
HelperTools.ConvertToString(actualMac)));
}
this.Context.Connected = true;
}
public override void HandleAu3Frame(Frames.MaslAu3Frame au3Frame)
{
var expectedDir = MaslFrameDirection.Client2Server;
if (au3Frame.Direction != expectedDir)
{
throw new DirectionFlagException(expectedDir);
}
// 收到AU3，关闭握手计时器。
this.Context.StopHandshakeTimer();
// 验证MAC
var actualMac = au3Frame.MAC;
var expectedMac = this.Context.AuMessageMacCalculator.CalcAu3MAC(au3Frame, this.Context.RsspEP.LocalID);
if (!ArrayHelper.Equals(expectedMac, actualMac))
{
throw new MacInAu3Exception(string.Format("Au3消息Mac检验失败，期望值={0}，实际值={1}",
HelperTools.ConvertToString(expectedMac),
HelperTools.ConvertToString(actualMac)));
}
// 发送AR
var arPkt = this.Context.AuMessageBuilder.BuildArPacket();
this.Context.AleConnection.SendUserData(arPkt);
// 连接建立。
this.Context.Connected = true;
}
public override void HandleAu2Frame(MaslAu2Frame au2Frame)
{
if (au2Frame.EncryAlgorithm != EncryptionAlgorithm.TripleDES)
{
throw new SafetyFeatureNotSupportedException();
}
var expectedDir = MaslFrameDirection.Server2Client;
if (au2Frame.Direction != expectedDir)
{
throw new DirectionFlagException(expectedDir);
}
var expectedId = this.Context.RsspEP.RemoteID & 0xFFFFFF;
if (au2Frame.ServerID != expectedId)
{
throw new IdentifyInAu2Exception(string.Format("AU2中无效的CTCS ID，期望值={0}（0x{0:X2}），实际值={1}（0x{1:X2}）。",
expectedId, au2Frame.ServerID));
}
// 更新远程设备（被动方）类型。
this.Context.RsspEP.RemoteEquipType = au2Frame.DeviceType;
// 更新RandomA
this.Context.MacCalculator.RandomA = au2Frame.RandomA;
// 初始化Mac计算器。
this.Context.MacCalculator.UpdateSessionKeys();
// 验证MAC。
var actualMac = au2Frame.MAC;
var expectedMac = this.Context.AuMessageMacCalculator.CalcAu2MAC(au2Frame, this.Context.RsspEP.LocalID);
if (!ArrayHelper.Equals(expectedMac, actualMac))
{
throw new MacInAu2Exception(string.Format("Au2消息Mac检验失败，期望值={0}，实际值={1}",
HelperTools.ConvertToString(expectedMac),
HelperTools.ConvertToString(actualMac)));
}
// 发送AU3。
var au3Pkt = this.Context.AuMessageBuilder.BuildAu3Packet();
this.Context.AleConnection.SendUserData(au3Pkt);
// 启动握手计时器，等待AR
this.Context.StartHandshakeTimer();
// 设置下一个状态。
this.Context.CurrentState = new MaslWaitingforArState(this.Context);
}
public void CheckAu1Packet(byte[] au1Bytes)
{
var au1Frame = MaslFrame.Parse(au1Bytes, 0, au1Bytes.Length - 1) as MaslAu1Frame;
if (au1Frame == null)
{
throw new Exception("无法将指定的字节流序列化为Au1Frame。");
}
if (!ArrayHelper.Equals(au1Frame.RandomB, _macCalc.RandomB))
{
throw new Exception(string.Format("Au1消息中的RandomB检验失败，期望值={0}，实际值={1}",
HelperTools.ConvertToString(_macCalc.RandomB),
HelperTools.ConvertToString(au1Frame.RandomB)));
}
}
public override void HandleDtFrame(Frames.MaslDtFrame dtFrame)
{
var expectedDir = !this.Context.RsspEP.IsInitiator ? MaslFrameDirection.Client2Server : MaslFrameDirection.Server2Client;
if (dtFrame.Direction != expectedDir)
{
throw new DirectionFlagException(expectedDir);
}
// 验证MAC
var actualMac = dtFrame.MAC;
var expectedMac = this.Context.AuMessageMacCalculator.CalcDtMAC(dtFrame, this.Context.RsspEP.LocalID);
if (!ArrayHelper.Equals(expectedMac, actualMac))
{
throw new MacInDtException(string.Format("Dt消息Mac检验失败，期望值={0}，实际值={1}",
HelperTools.ConvertToString(expectedMac),
HelperTools.ConvertToString(actualMac)));
}
// 提交到上层。
this.Context.Observer.OnMaslUserDataArrival(dtFrame.UserData);
}
