public void TestAes()
{
CryptographyProvider provider = CryptographyProvider.Create("AES");
string random = Tester.RandomString(minLength: 10);
string encrypted = provider.EncryptToString(random);
Assert.IsNotNull(encrypted);
Assert.AreNotEqual(random, encrypted);
string decrypted = provider.DecryptToString(encrypted);
Assert.IsNotNull(decrypted);
Assert.AreEqual(random, decrypted);
}
public void Create_Providers_And_Save()
{
// Supported algorithmns (see https://msdn.microsoft.com/en-us/library/system.security.cryptography.cryptoconfig(v=vs.110).aspx)
string[] names = new[]
{
// Asymmetric algorithms
"RSA",
/*
* "DSA",
* "ECDH",
* "ECDsa"
*/
// Symmetric algorithms
"AES",
"DES",
"3DES",
"RC2",
"Rijndael",
// Hashing algorithms
"MD5",
"RIPEMD160",
"SHA",
"SHA256",
"SHA384",
"SHA512",
// Keyed hashing algorithms
"HMACMD5",
"HMACRIPEMD160",
"HMACSHA1",
"HMACSHA256",
"HMACSHA384",
"HMACSHA512",
"MACTripleDES",
// Random number generator
"RandomNumberGenerator"
};
int providerCount = names.Length;
CryptographyConfiguration configuration = CryptographyConfiguration.Active;
Trace.WriteLine($"Configuration file : {configuration.FilePath}");
ProviderCollection providerCollection = configuration.Providers;
Assert.IsNotNull(providerCollection);
// Generate random keys for each algorithm
string[] keys = names.Select(n => $"{n}-{Guid.NewGuid()}").ToArray();
// Detect changes to configuration
EventWaitHandle ewh = new EventWaitHandle(false, EventResetMode.AutoReset);
ConfigurationSection <CryptographyConfiguration> .ActiveChanged += (o, e) =>
{
Assert.IsNotNull(o);
Assert.IsNotNull(e);
ewh.Set();
};
// Add providers
CryptographyProvider[] providers = new CryptographyProvider[providerCount];
for (int k = 0; k < providerCount; k++)
{
bool added = false;
providers[k] = CryptographyConfiguration.Active.GetOrAddProvider(
// ReSharper disable once AssignNullToNotNullAttribute
keys[k],
() =>
{
added = true;
return(CryptographyProvider.Create(names[k]));
});
Assert.IsTrue(added);
}
// Wait for the configuration changed event to fire
Assert.IsTrue(ewh.WaitOne(TimeSpan.FromSeconds(5)), "Configuration changed event did not fire.");
CollectionAssert.AllItemsAreNotNull(providers);
CollectionAssert.AllItemsAreInstancesOfType(providers, typeof(CryptographyProvider));
configuration = CryptographyConfiguration.Active;
for (int k = 0; k < providerCount; k++)
{
CryptographyProvider provider = providers[k];
Assert.IsNotNull(provider);
string key = keys[k];
Assert.IsNotNull(key);
Assert.AreEqual(key, provider.Id, "The provider did not have it's ID set!");
Assert.IsNotNull(provider.Configuration);
CryptographyProvider reloadProvider = configuration.GetProvider(key);
Assert.IsNotNull(reloadProvider);
Assert.AreEqual(key, reloadProvider.Id, "The loaded provider did not have it's ID set!");
// Check configs match
Tuple <XObject, XObject> difference = provider.Configuration.DeepEquals(
reloadProvider.Configuration,
XObjectComparisonOptions.Semantic);
Assert.IsNull(difference, $"Configurations do not match {difference?.Item1} : {difference?.Item2}");
if (reloadProvider.CanEncrypt)
{
// Test encryption
string random = Tester.RandomString(minLength: 1);
string encrypted = provider.EncryptToString(random);
Assert.IsNotNull(encrypted);
Assert.IsFalse(random == encrypted, "Expected and actual string are equal.");
if (reloadProvider.CanDecrypt)
{
string decrypted = provider.DecryptToString(encrypted);
Assert.IsNotNull(decrypted);
Assert.IsTrue(
random == decrypted,
"Expected: {0}\r\n Actual: {1}",
Convert.ToBase64String(Encoding.Unicode.GetBytes(random)),
Convert.ToBase64String(Encoding.Unicode.GetBytes(decrypted)));
}
}
// Remove provider from configuration
configuration.Providers.Remove(key);
}
// Re-save configuration
configuration.Save();
// Wait for the configuration changed event to fire
Assert.IsTrue(ewh.WaitOne(TimeSpan.FromSeconds(1)), "Configuration changed event did not fire.");
for (int k = 0; k < providerCount; k++)
{
string key = keys[k];
Assert.IsNotNull(key);
Assert.IsNull(
configuration.GetProvider(key),
"The provider with key '{key'} was not removed successfully.");
}
}