public void writeMasterKey(ref int parr_seed)
{
var randomNumbers = new int[8];
//Generate random numbers
var tGNUR = new GnuRand((UInt32)parr_seed);
for (int idx = 0; idx < 8; idx++)
{
randomNumbers[idx] = tGNUR.Next();
}
//Convert them to bytes
byte[] masterBytes = new byte[randomNumbers.Length * sizeof(int)];
Buffer.BlockCopy(randomNumbers, 0, masterBytes, 0, masterBytes.Length);
//Compute SHA256 1024 times
var hasher = System.Security.Cryptography.SHA256Managed.Create();
for (int idx = 0; idx < 1024; idx++)
{
masterBytes = hasher.ComputeHash(masterBytes);
}
//Write to file
ByteArrayToFile(deviceSerialNumber, masterBytes);
Console.WriteLine();
Console.WriteLine("Master File written");
currentDate = "Master file written. Password cracked: " + parr_seed;
}
private static bool ValidateSecretKey(int currentSeed)
{
var randomNumbers = new int[8];
//Make 8 random integers, Unix style
var tGNUR = new GnuRand((UInt32)currentSeed);
for (int idx = 0; idx < 8; idx++)
{
randomNumbers[idx] = tGNUR.Next();
}
//Then, use that to generate a random set of 32 bytes
byte[] initialByteSeed = new byte[randomNumbers.Length * sizeof(int)];
Buffer.BlockCopy(randomNumbers, 0, initialByteSeed, 0, initialByteSeed.Length);
//1024 SHA256 operations on the same set of bytes
var hasher = System.Security.Cryptography.SHA256Managed.Create();
for (int idx = 0; idx < 1024; idx++)
{
initialByteSeed = hasher.ComputeHash(initialByteSeed);
}
hasher.Dispose();
//Prepare HMAC hash
HMACSHA256 hmc = new HMACSHA256(initialByteSeed);
byte[] HMAC_Hash = hmc.ComputeHash(deviceSerial);
hmc.Dispose();
//Reverse Dword sections of the HMAC hash (because they're integers?)
//for (int idx = 0; idx < 32; idx += 4)
// Array.Reverse(HMAC_Hash, idx, 4);
//This isn't needed.
//SecretKeyBuilder
int a2 = 32;
byte[] result = new byte[8 * a2 / 5 + 8];
int v3 = 0;
byte v12 = 0;
byte v11 = 0;
byte v5;
byte v7;
int v4 = 0;
char v9;
byte[] a1 = HMAC_Hash;
byte v6;
byte v8;
int v10;
do
{
v9 = (char)a1[v3];
result[v12] = (byte)byte_4FF020[(byte)((a1[v3]) >> 3)];
if (v4 + 1 == a2)
{
result[v12 + 2] = 0;
result[v12 + 1] = (byte)byte_4FF020[4 * (v9 & 7)];
}
else
{
v5 = (a1[v3 + 1]);;
result[v12 + 1] = (byte)byte_4FF020[(byte)(a1[v3 + 1] >> 6) | 4 * (v9 & 7)];
result[v12 + 2] = (byte)byte_4FF020[(v5 >> 1) & 0x1F];
if (v4 + 2 == a2)
{
result[v12 + 4] = 0;
result[v12 + 3] = (byte)byte_4FF020[16 * (v5 & 1)];
}
else
{
v6 = (a1 [v3 + 2]);
result[v12 + 3] = (byte)byte_4FF020[(byte)(a1[v3 + 2] >> 4) | 16 * (v5 & 1)];
if (v4 + 3 == a2)
{
result[v12 + 5] = 0;
result[v12 + 4] = (byte)byte_4FF020[2 * (v6 & 0xF)];
}
else
{
v7 = (a1[v3 + 3]);
result[v12 + 4] = (byte)byte_4FF020[(byte)(a1[v3 + 3] >> 7) | 2 * (v6 & 0xF)];
result[v12 + 5] = (byte)byte_4FF020[(v7 >> 2) & 0x1F];
if (v4 + 4 == a2)
{
result[v12 + 7] = 0;
result[v12 + 6] = (byte)byte_4FF020[8 * (v7 & 3)];
}
else
{
v8 = (byte)byte_4FF020[(byte)(a1[v3 + 4] >> 5) | 8 * (v7 & 3)];
result[v12 + 7] = (byte)byte_4FF020[(a1[v3 + 4] & 0x1F)];
result[v12 + 6] = v8;
}
}
}
}
v11 += 5;
v12 += 8;
v4 = v11;
v3 = v11;
}while (a2 > v11);
v10 = v12;
result[v10] = 0;
//SecretKeyBuilder Ends here
for (int idx = 0; idx < 52; idx++)
{
if (TargetSecretKey[idx] == result[idx])
{
continue;
}
else
{
return(false);
}
}
return(true);
}
