public void CanDecryptData()
{
byte[] userData = { 0, 1, 2, 3, 4, 1, 2, 3, 4 };
byte[] cipherData = ProtectedData.Protect(userData, null, DataProtectionScope.CurrentUser);
DataProtectionCryptographyService svc = new DataProtectionCryptographyService();
byte[] restored = svc.DecryptSymmetric(cipherData);
Assert.AreEqual(9, restored.Length, "Restored data is not correct.");
for (int i = 0; i < userData.Length; i++)
{
Assert.AreEqual(userData[i], restored[i], "The decryption failed.");
}
}
public void DecryptUsingEntropy()
{
byte[] userData = { 0, 1, 2, 3, 4, 1, 2, 3, 4 };
byte[] entropy = { 1, 2, 3, 4 };
NameValueCollection settings = new NameValueCollection();
settings["Entropy"] = Convert.ToBase64String(entropy);
DataProtectionCryptographyService svc = new DataProtectionCryptographyService();
svc.Configure(settings);
byte[] cipherData = ProtectedData.Protect(userData, entropy, DataProtectionScope.CurrentUser);
byte[] recovered = svc.DecryptSymmetric(cipherData);
Assert.AreEqual(Convert.ToBase64String(userData), Convert.ToBase64String(recovered));
}
public void DecryptFailsIfNullData()
{
DataProtectionCryptographyService svc = new DataProtectionCryptographyService();
svc.DecryptSymmetric(null);
}
