public static void VerifySmartCard(SmartCardDevice smartCardDevice, byte[] com, byte[] response, string hashFunctionName, byte[] proofSession, byte[] challangeMgs)
{
BigInteger resp = new BigInteger(1, response);
//BigInteger comBig = new BigInteger(1, com);
HashFunction hash = new HashFunction(hashFunctionName);
//hash.Hash(new byte[1] {0x1});
//hash.Hash(1);
byte[] proofSessionFoo = new byte[1 + proofSession.Length];
proofSessionFoo[0] = 1;
Buffer.BlockCopy(proofSession, 0, proofSessionFoo, 1, proofSession.Length);
hash.Hash(proofSessionFoo);
hash.Hash(challangeMgs);
byte[] cByte = hash.Digest;
BigInteger c = new BigInteger(1, cByte);
byte[] devicePubKeyByte = smartCardDevice.Device.GetDevicePublicKey(true);
//BigInteger devicePubKey = new BigInteger(1, devicePubKeyByte);
SubgroupGroupDescription subGq = (SubgroupGroupDescription)smartCardDevice.getGroupDescription();
SubgroupGroupElement leftSide = (SubgroupGroupElement)smartCardDevice.getGroupElement().Exponentiate(resp);
SubgroupGroupElement pk = (SubgroupGroupElement)subGq.CreateGroupElement(devicePubKeyByte);
SubgroupGroupElement pkc = (SubgroupGroupElement)pk.Exponentiate(c.Negate());
SubgroupGroupElement rightSide = (SubgroupGroupElement)pkc.Multiply(smartCardDevice.getGroupDescription().CreateGroupElement(com));
Console.Out.WriteLine("Printing left and right side");
Utils.PrintByteArrayToConsole(leftSide.GetEncoded());
Utils.PrintByteArrayToConsole(rightSide.GetEncoded());
}
public static GroupDescription convertSubgroupDescription(SubgroupGroupDescriptionComposite sGroupComp)
{
SubgroupGroupDescription sGroup = new SubgroupGroupDescription();
// TODO add error handling here.
sGroup.P = new BigInteger(1, sGroupComp.P);
sGroup.Q = new BigInteger(1, sGroupComp.Q);
sGroup.G = new SubgroupGroupElement(new BigInteger(1, sGroupComp.G), sGroup.P);
return(sGroup);
}
public static SubgroupGroupDescriptionComposite convertSubgroupDescription(GroupDescription Gq)
{
SubgroupGroupDescription sGroup = (SubgroupGroupDescription)Gq;
//TODO add error handling here.
SubgroupGroupDescriptionComposite sGroupComp = new SubgroupGroupDescriptionComposite();
sGroupComp.P = sGroup.P.ToByteArray();
sGroupComp.Q = sGroup.Q.ToByteArray();
sGroupComp.G = sGroup.G.GetEncoded();
return(sGroupComp);
}
public static GroupDescription convertSubgroupDescription(SubgroupGroupDescriptionComposite sGroupComp)
{
SubgroupGroupDescription sGroup = new SubgroupGroupDescription();
// TODO add error handling here.
sGroup.P = new BigInteger(1, sGroupComp.P);
sGroup.Q = new BigInteger(1, sGroupComp.Q);
sGroup.G = new SubgroupGroupElement(new BigInteger(1, sGroupComp.G), sGroup.P);
return sGroup;
}
