private static void TestEncryption()
{
byte[] salt = new byte[] { 65, 61, 53, 222, 105, 5, 199, 241, 213, 56, 19, 120, 251, 37, 66, 185 };
byte[] data = new byte[255];
for (int i = 0; i < data.Length; i++)
{
data[i] = (byte)i;
}
byte[] password = new byte[16];
for (int i = password.Length - 1; i >= 0; i--)
{
password[i] = (byte)i;
}
byte[] encrypted = CryptoUtility.AesEncryption(data, password, salt);
byte[] decrypted = CryptoUtility.AesDecryption(encrypted, password, salt);
if (!decrypted.SequenceEqual(data))
{
throw new ApplicationException("AES encryption test fail");
}
byte[] protectedData = DataProtector.Protect(salt);
byte[] unprotectedData = DataProtector.Unprotect(protectedData);
if (!unprotectedData.SequenceEqual(salt))
{
throw new ApplicationException("Protected data API fail");
}
}
public void AESEncryption()
{
byte[] salt = new byte[] { 65, 61, 53, 222, 105, 5, 199, 241, 213, 56, 19, 120, 251, 37, 66, 185 };
byte[] data = new byte[255];
for (int i = 0; i < data.Length; i++)
{
data[i] = (byte)i;
}
byte[] password = new byte[16];
for (int i = password.Length - 1; i >= 0; i--)
{
password[i] = (byte)i;
}
byte[] encrypted = CryptoUtility.AesEncryption(data, password, salt);
byte[] decrypted = CryptoUtility.AesDecryption(encrypted, password, salt);
Assert.IsTrue(decrypted.SequenceEqual(data));
byte[] protectedData = DataProtector.Protect(salt);
byte[] unprotectedData = DataProtector.Unprotect(protectedData);
Assert.IsTrue(unprotectedData.SequenceEqual(salt));
}
/// <summary>
/// Store an encrypted key file for user or machine level usage
/// </summary>
/// <param name="scope">Scope</param>
/// <returns>RSA key</returns>
public static RSA RSAFromFile(DataProtectionScope scope)
{
byte[] esp = new byte[] { 69, 155, 31, 254, 7, 18, 99, 187 };
byte[] esl = new byte[] { 101, 5, 79, 221, 48, 42, 26, 123 };
string xmlFile = (scope == DataProtectionScope.CurrentUser ? Path.Combine(System.Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "esku_123_abc.bin") :
Path.Combine(System.Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "eskm_123_abc.bin"));
RSACryptoServiceProvider rsa;
if (File.Exists(xmlFile))
{
byte[] xmlBytes = File.ReadAllBytes(xmlFile);
xmlBytes = CryptoUtility.AesDecryption(xmlBytes, esp, esl);
rsa = new RSACryptoServiceProvider();
RSAKeyExtensions.FromXmlString(rsa, CryptoUtility.UTF8EncodingNoPrefix.GetString(xmlBytes));
}
else
{
rsa = new RSACryptoServiceProvider(4096);
byte[] xmlBytes = RSAKeyExtensions.ToXmlString(rsa, true).ToBytesUTF8();
xmlBytes = CryptoUtility.AesEncryption(xmlBytes, esp, esl);
File.WriteAllBytes(xmlFile, xmlBytes);
}
return(rsa);
}
