internal static bool VerifyKey(string key)
{
_lastError = CPUKeyCheckErrors.Success;
if (key.Length < 32) {
_lastError = CPUKeyCheckErrors.TooShort;
return false;
}
if (key.Length > 32) {
_lastError = CPUKeyCheckErrors.TooLong;
return false;
}
UInt64 tmp1, tmp2;
if (!UInt64.TryParse(key.Substring(0, 16), NumberStyles.AllowHexSpecifier, null, out tmp1)) {
_lastError = CPUKeyCheckErrors.BadKeyData1;
return false;
}
if (!UInt64.TryParse(key.Substring(16), NumberStyles.AllowHexSpecifier, null, out tmp2)) {
_lastError = CPUKeyCheckErrors.BadKeyData2;
return false;
}
var hamming = CountBits(tmp1);
hamming += CountBits(tmp2 & 0xFFFFFFFFFF030000);
if (hamming != 53) {
_lastError = CPUKeyCheckErrors.BadHamming;
return false;
}
var keydata = Keytoarray(key);
var keytmp = new byte[keydata.Length];
Buffer.BlockCopy(keydata, 0, keytmp, 0, keydata.Length);
if (!CalcCPUKeyECD(ref keytmp))
{
_lastError = CPUKeyCheckErrors.Unkown;
return false;
}
if (!CompareByteArrays(keydata, keytmp)) {
_lastError = CPUKeyCheckErrors.BadECD;
return false;
}
return true;
}