/// <summary>
/// Generate a key pair
/// </summary>
public void Generate()
{
if (KeyProvider == "RSA")
{
using (var rsa = new RSA())
{
BigNumber exponent = 0x10001; // this needs to be a prime number
rsa.GenerateKeys(KeySize, exponent, null, null);
KeyPair = new CryptoKey(rsa);
}
}
//else if (keyprovider.StartsWith("ECDSA"))
//{
// // var x= new Al.Security.Crypto.Generators.DsaKeyPairGenerator();
// X9ECParameters ecP = NistNamedCurves.GetByName(keyprovider.Replace("ECDSA_","").Insert(1,"-"));
// ECDomainParameters ecSpec = new ECDomainParameters(ecP.Curve, ecP.G, ecP.N, ecP.H, ecP.GetSeed());
// ECKeyPairGenerator keyPairGenerator = new ECKeyPairGenerator("ECDSA");
// keyPairGenerator.Init(new ECKeyGenerationParameters(ecSpec, new SecureRandom()));
// KeyPair = keyPairGenerator.GenerateKeyPair();
//}
else
{
using (var dsa = new DSA(KeySize, null, null))
{
// BigNumber exponent = 0x10001; // this needs to be a prime number
dsa.GenerateKeys();
KeyPair = new CryptoKey(dsa);
}
}
}
private void DoTest(DSA dsa)
{
Console.WriteLine("seed");
Console.WriteLine(BitConverter.ToString(seed));
Console.WriteLine("counter={0} h={1}", dsa.Counter, dsa.H);
Console.WriteLine(dsa);
Assert.AreEqual(105, dsa.Counter);
Assert.AreEqual(2, dsa.H.ToInt32());
using (BigNumber q = BigNumber.FromArray(this.out_q)) {
Assert.IsTrue(q == dsa.Q);
}
using (BigNumber p = BigNumber.FromArray(this.out_p)) {
Assert.IsTrue(p == dsa.P);
}
using (BigNumber g = BigNumber.FromArray(this.out_g)) {
Assert.IsTrue(g == dsa.G);
}
byte[] msg = Encoding.ASCII.GetBytes(str1);
dsa.ConstantTime = true;
dsa.GenerateKeys();
byte[] sig = dsa.Sign(msg);
Assert.IsTrue(dsa.Verify(msg, sig));
dsa.ConstantTime = false;
dsa.GenerateKeys();
sig = dsa.Sign(msg);
Assert.IsTrue(dsa.Verify(msg, sig));
}
private void DoTest(DSA dsa)
{
Console.WriteLine("seed");
Console.WriteLine(BitConverter.ToString(seed));
Console.WriteLine("counter={0} h={1}", dsa.Counter, dsa.H);
Console.WriteLine(dsa);
if (dsa.Counter != 105)
{
throw new Exception("counter should be 105");
}
if (dsa.H != 2)
{
throw new Exception("h should be 2");
}
using (BigNumber q = BigNumber.FromArray(this.out_q))
{
if (dsa.Q != q)
{
throw new Exception("q value is wrong");
}
}
using (BigNumber p = BigNumber.FromArray(this.out_p))
{
if (dsa.P != p)
{
throw new Exception("p value is wrong");
}
}
using (BigNumber g = BigNumber.FromArray(this.out_g))
{
if (dsa.G != g)
{
throw new Exception("g value is wrong");
}
}
byte[] msg = Encoding.ASCII.GetBytes(str1);
dsa.ConstantTime = true;
dsa.GenerateKeys();
byte[] sig = dsa.Sign(msg);
if (!dsa.Verify(msg, sig))
{
throw new Exception("DSA signature failed to verify");
}
dsa.ConstantTime = false;
dsa.GenerateKeys();
sig = dsa.Sign(msg);
if (!dsa.Verify(msg, sig))
{
throw new Exception("DSA signature failed to verify");
}
}