public void test_builtin()
{
/* fill digest values with some random data */
byte[] digest = Random.PseudoBytes(20);
byte[] wrong_digest = Random.PseudoBytes(20);
/* create and verify a ecdsa signature with every availble curve
* (with ) */
Console.WriteLine("testing ECDSA_sign() and ECDSA_verify() with some internal curves:");
/* get a list of all internal curves */
BuiltinCurve[] curves = BuiltinCurve.Get();
/* now create and verify a signature for every curve */
foreach (BuiltinCurve curve in curves)
{
if (curve.Object.NID == Objects.NID.ipsec4.NID)
{
continue;
}
/* create new ecdsa key (== EC_KEY) */
using (Key eckey = new Key())
{
using (Group group = Group.FromCurveName(curve.Object))
{
eckey.Group = group;
}
if (eckey.Group.Degree < 160)
{
/* drop the curve */
continue;
}
Console.Write("{0}: ", curve.Object.ShortName);
/* create key */
eckey.GenerateKey();
/* create second key */
using (Key wrong_eckey = new Key())
{
using (Group group = Group.FromCurveName(curve.Object))
{
wrong_eckey.Group = group;
}
wrong_eckey.GenerateKey();
Console.Write(".");
/* check key */
Assert.IsTrue(eckey.CheckKey());
Console.Write(".");
/* create signature */
byte[] signature = new byte[eckey.Size];
var sigSize = eckey.Sign(0, digest, signature);
Array.Resize(ref signature, (int)sigSize);
Console.Write(".");
/* verify signature */
var verifyResult = eckey.Verify(0, digest, signature);
Assert.IsTrue(verifyResult);
Console.Write(".");
/* verify signature with the wrong key */
Assert.IsFalse(wrong_eckey.Verify(0, digest, signature));
Console.Write(".");
/* wrong digest */
Assert.IsFalse(eckey.Verify(0, wrong_digest, signature));
Console.Write(".");
Console.WriteLine(" ok");
}
}
}
}
public static TweenCurve Get(BuiltinCurve curve)
{
return(Get(curve.ToString()));
}
