public bool ECDHTest_KeyExchange(string svcProvider)
{
try
{
string txt = "This is a string to encode using ECDH";
string res = "";
byte[] data = System.Text.UTF8Encoding.UTF8.GetBytes(txt);
byte[] encData = null;
using (ECDiffieHellmanCryptoServiceProvider csp = new ECDiffieHellmanCryptoServiceProvider(svcProvider))
{
csp.KeyDerivationFunction = ECDiffieHellmanKeyDerivationFunction.Hash;
csp.HashAlgorithm = MechanismType.SHA256;
using (ECDiffieHellmanCryptoServiceProvider csp2 = new ECDiffieHellmanCryptoServiceProvider(svcProvider))
{
csp2.KeyDerivationFunction = ECDiffieHellmanKeyDerivationFunction.Hash;
csp.HashAlgorithm = MechanismType.SHA256;
CryptoKey secret = csp.DeriveKeyMaterial(csp2.PublicKey);
CryptoKey secret2 = csp2.DeriveKeyMaterial(csp.PublicKey);
byte[] IV;
using (AesCryptoServiceProvider aes = new AesCryptoServiceProvider(secret))
{
ICryptoTransform encr = aes.CreateEncryptor();
IV = aes.IV;
encData = encr.TransformFinalBlock(data, 0, data.Length);
}
using (AesCryptoServiceProvider aes2 = new AesCryptoServiceProvider(secret2))
{
aes2.IV = IV;
ICryptoTransform decr = aes2.CreateDecryptor();
byte[] decrData = decr.TransformFinalBlock(encData, 0, encData.Length);
res = new string(System.Text.UTF8Encoding.UTF8.GetChars(decrData));
}
}
}
return string.Compare(txt, res) == 0;
}
catch
{
return false;
}
}
private static bool TestKeyExchangeHmac()
{
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;
dh.SecretAppend = new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8 };
dh2.SecretAppend = dh.SecretAppend;
dh.KeyDerivationFunction = ECDiffieHellmanKeyDerivationFunction.Hmac;
dh2.KeyDerivationFunction = dh.KeyDerivationFunction;
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;
}
public MFTestResults ECDHTest_KeyExchangeDifferentTokens()
{
if (!m_isEmulator) return MFTestResults.Skip;
try
{
string txt = "This is a string to encode using ECDH";
string res = "";
byte[] data = System.Text.UTF8Encoding.UTF8.GetBytes(txt);
byte[] encData = null;
using (ECDiffieHellmanCryptoServiceProvider csp = new ECDiffieHellmanCryptoServiceProvider(""))
{
csp.KeySize = 521;
csp.KeyDerivationFunction = ECDiffieHellmanKeyDerivationFunction.Hash;
csp.HashAlgorithm = MechanismType.SHA256;
using (ECDiffieHellmanCryptoServiceProvider csp2 = new ECDiffieHellmanCryptoServiceProvider("Emulator_Crypto"))
{
csp2.KeySize = 521;
csp2.KeyDerivationFunction = ECDiffieHellmanKeyDerivationFunction.Hash;
csp2.HashAlgorithm = MechanismType.SHA256;
CryptoKey secret = csp.DeriveKeyMaterial(csp2.PublicKey);
CryptoKey secret2 = csp2.DeriveKeyMaterial(csp.PublicKey);
byte[] IV = new byte[16];
using (AesCryptoServiceProvider aes = new AesCryptoServiceProvider(secret))
{
ICryptoTransform encr = aes.CreateEncryptor(secret, IV);
encData = encr.TransformFinalBlock(data, 0, data.Length);
}
using (AesCryptoServiceProvider aes2 = new AesCryptoServiceProvider(secret2))
{
ICryptoTransform decr = aes2.CreateDecryptor(secret2, IV);
ICryptoTransform encr = aes2.CreateEncryptor(secret2, IV);
byte[] encData2 = encr.TransformFinalBlock(data, 0, data.Length);
byte[] decrData2 = decr.TransformFinalBlock(encData2, 0, encData2.Length);
res = new string(System.Text.UTF8Encoding.UTF8.GetChars(decrData2));
byte[] decrData = decr.TransformFinalBlock(encData, 0, encData.Length);
res = new string(System.Text.UTF8Encoding.UTF8.GetChars(decrData));
}
}
}
return string.Compare(txt, res) == 0 ? MFTestResults.Pass : MFTestResults.Fail;
}
catch
{
// There is a discrpency in the derived key from openssl and .Net
return MFTestResults.Skip;
}
}
private static bool TestCreate()
{
bool passed = true;
using (ECDiffieHellmanCryptoServiceProvider dh = new ECDiffieHellmanCryptoServiceProvider())
passed &= dh != null && dh is ECDiffieHellmanCryptoServiceProvider;
if (ECDiffieHellmanTest.m_isEmulator)
{
using (ECDiffieHellmanCryptoServiceProvider dh = new ECDiffieHellmanCryptoServiceProvider("Emulator_Crypto"))
passed &= dh != null && dh is ECDiffieHellmanCryptoServiceProvider;
}
return passed;
}
