internal void CheckInternal(ISecureValue value)
{
if (DetectCheck(value))
{
Detected(value);
}
}
public static byte[] Xor <T>(this ISecureValue <T> secureValue, byte[] buffer)
{
byte[] seed = secureValue.Seed;
for (int i = 0; i < buffer.Length; i++)
{
buffer[i] = (byte)(buffer[i] ^ seed[i]);
}
return(buffer);
}
internal void UpdateInternal(ISecureValue value)
{
if (!Enable)
{
return;
}
if (mode == TamperDetectionMode.CheckSum)
{
checkSumDic[value] = value.Sum();
}
else if (mode == TamperDetectionMode.CRC)
{
crcDic[value] = value.CRC();
}
else if (mode == TamperDetectionMode.Hash)
{
hashDic[value] = value.Hash();
}
}
public bool DetectCheck(ISecureValue value)
{
if (!Enable)
{
return(false);
}
if (mode == TamperDetectionMode.CheckSum)
{
if (!checkSumDic.ContainsKey(value))
{
checkSumDic[value] = value.Sum();
return(false);
}
return(checkSumDic[value] != value.Sum());
}
else if (mode == TamperDetectionMode.CRC)
{
if (!crcDic.ContainsKey(value))
{
crcDic[value] = value.CRC();
return(false);
}
return(crcDic[value] != value.CRC());
}
else if (mode == TamperDetectionMode.Hash)
{
if (!hashDic.ContainsKey(value))
{
hashDic[value] = value.Hash();
return(false);
}
return(hashDic[value] != value.Hash());
}
return(false);
}
internal void AddSecureValue(ISecureValue value)
{
checkSumDic[value] = (mode == TamperDetectionMode.CheckSum && Enable) ? value.Sum() : 0;
crcDic[value] = (mode == TamperDetectionMode.CRC && Enable) ? value.CRC() : 0;
hashDic[value] = (mode == TamperDetectionMode.Hash && Enable) ? value.Hash() : null;
}
