public override byte[] Unwrap(GPResponse response)
{
if (rmac)
{
if (response.ResponseData.Length < 8)
{
throw new Exception("Wrong response length (too short).");
}
int respLen = response.ResponseData.Length - 8;
rMac.Write(respLen);
rMac.Write(response.ResponseData, 0, respLen);
rMac.Write(response.SW1);
rMac.Write(response.SW2);
ricv = Mac_des_3des(sessionKeys.GetKey(KeySessionType.RMAC), Pad80(rMac.ToByteArray(), 8), ricv);
byte[] actualMac = new byte[8];
Array.Copy(response.ResponseData, respLen, actualMac, 0, 8);
if (!Arrays.AreEqual(ricv, actualMac))
{
throw new Exception("RMAC invalid.");
}
ByteArrayOutputStream o = new ByteArrayOutputStream();
o.Write(response.ResponseData, 0, respLen);
o.Write(response.SW1);
o.Write(response.SW2);
return(o.ToByteArray());
}
return(response.ResponseData);
}
public override byte[] Unwrap(GPResponse response)
{
return(response.ResponseData);
}
public abstract byte[] Unwrap(GPResponse response);