private static bool TestKeyExchangeHash()
{
bool passed = true;
int[] keySizes = new int[] { 256, 384, 521 };
MechanismType[] hashAlgorithms = new MechanismType[]
{
MechanismType.MD5,
MechanismType.SHA_1,
MechanismType.SHA256,
MechanismType.SHA384,
MechanismType.SHA512
};
foreach (int keySize in keySizes)
{
WriteLine(" Using key size " + keySize);
foreach (MechanismType hashAlgorithm in hashAlgorithms)
{
WriteLine(" Hash algorithm " + hashAlgorithm.ToString());
using (ECDiffieHellmanCryptoServiceProvider dh = new ECDiffieHellmanCryptoServiceProvider())
using (ECDiffieHellmanCryptoServiceProvider dh2 = new ECDiffieHellmanCryptoServiceProvider())
{
dh.KeySize = keySize;
dh2.KeySize = keySize;
dh.HashAlgorithm = hashAlgorithm;
dh2.HashAlgorithm = hashAlgorithm;
CryptoKey k1 = dh.DeriveKeyMaterial(dh2.PublicKey);
CryptoKey k2 = dh2.DeriveKeyMaterial(dh.PublicKey);
byte[] key1 = k1.ExportKey(true);
byte[] key2 = k2.ExportKey(true);
WriteLine(" " + key1.Length * 8 + " bit key generated");
if (key1 == null || key2 == null)
{
WriteLine("Fail -- null key");
passed = false;
}
if (!CompareBytes(key1, key2))
{
WriteLine("Fail");
passed = false;
}
}
}
}
return(passed);
}
