public static byte[] CreateSignature(byte[] data, CngKey key)
{
// 创建签名
byte[] signature;
using(var signingAlg = new ECDsaCng(key))
{
signature = signingAlg.SignData(data);
signingAlg.Clear();
}
return signature;
}
static void Main(string[] args)
{
if (args.Length == 1)
{
// Got Signature (License)? Then Verify it
byte[] signature = Convert.FromBase64String(args[0]);
// Public key must be hard-coded!
const string publicKeyString = "RUNTMSAAAACOUGMbADUgo3dDq42gwv+uCPsI8jjQm61r0CUPVioibLfzskpsGmUAJD29rt3FzS5qb28gS5Ed85jDPwQoesBJ";
byte[] publicKey = Convert.FromBase64String(publicKeyString);
CngKey cngKey = CngKey.Import(publicKey, CngKeyBlobFormat.EccPublicBlob);
ECDsaCng dsa = new ECDsaCng(cngKey);
dsa.HashAlgorithm = CngAlgorithm.MD5;
if (dsa.VerifyData(MachineID.ComputeEasyMachineID(), signature))
{
Console.WriteLine("License is valid. Thank you!");
}
else
{
Console.WriteLine("License is invalid!");
}
dsa.Clear();
}
else
{
// No Signature (License). Display InstallationID
Console.WriteLine("No license found. Contact your software vendor and provide the following code:");
foreach (byte b in MachineID.ComputeEasyMachineID())
{
Console.Write(b);
}
}
Console.WriteLine("Press any key to continue ...");
Console.ReadKey();
}
public static bool VerifySignature(byte[] data, byte[] signature, byte[] pubKey)
{
// 验证签名
bool result = false;
using (CngKey key = CngKey.Import(pubKey, CngKeyBlobFormat.GenericPublicBlob))
{
using(var signingAlg = new ECDsaCng(key))
{
result = signingAlg.VerifyData(data, signature);
signingAlg.Clear();
}
}
return result;
}
private bool VerifySignature(byte[] data, byte[] signature, byte[] pubKey)
{
bool retValue = false;
using (CngKey key = CngKey.Import(pubKey, CngKeyBlobFormat.GenericPublicBlob))
using (var signingAlg = new ECDsaCng(key))
{
#if NET46
retValue = signingAlg.VerifyData(data, signature);
signingAlg.Clear();
#else
retValue = signingAlg.VerifyData(data, signature, HashAlgorithmName.SHA512);
#endif
}
return retValue;
}
private byte[] CreateSignature(byte[] data, CngKey key)
{
byte[] signature;
using (var signingAlg = new ECDsaCng(key))
{
#if NET46
signature = signingAlg.SignData(data);
signingAlg.Clear();
#else
signature = signingAlg.SignData(data, HashAlgorithmName.SHA512);
#endif
}
return signature;
}
static void Main(string[] args)
{
if (args.Length != 1 && args[0].Length != 8)
{
Console.WriteLine("Use a valid MachineID as the argument.");
return;
}
else
{
Console.WriteLine("MachineID: " + args[0]);
}
// The data to sign.
byte[] data = new byte[8];
// Convert MachineID to byte array
for (int i = 0; i < 8; i++)
{
data[i] = Byte.Parse(args[0][i].ToString());
}
// Load the key from system store
// This key was created by key gen
CngKey cngKey = CngKey.Open("PA ECDSA Key");
using (ECDsaCng dsa = new ECDsaCng(cngKey))
{
dsa.HashAlgorithm = CngAlgorithm.MD5;
byte[] signature = dsa.SignData(data);
dsa.Clear();
// Print signature
Console.WriteLine("\nSignature:\n" + Debugger.BytesToString(signature));
// Base64
Console.WriteLine("\nSignature in Base64:\n" + CodeConverter.ToBase64(signature));
// Big numbers
Console.WriteLine("\nSignature in Codes:");
ulong[] a = CodeConverter.ToInt64Array(signature);
foreach (ulong i in a) Console.WriteLine(i.ToString());
// Formated Base32
Console.WriteLine("\nSignature in Formated Base32:\n" + CodeConverter.ToFormatedBase32Code(signature));
Console.WriteLine("\nPress any key to continue");
Console.ReadKey();
}
}