public void Create_Message_Encrypt_Decrypt_Verify()
{
// Arrange:
var repository = new RequestRepository();
var request = CryptoKey.CreateRequest(DateTime.Now);
var keys = AsymmetricCryptoProvider.GenerateKeys();
var crypto = new AsymmetricCryptoProvider();
const string message = "secret message";
string encryptedPassword;
string hash;
string encryptedMessage = crypto.EncryptMessageWithKey(message, keys.PublicKey, out encryptedPassword,
out hash);
request.Messages.Add(new Message
{
MessageData = encryptedMessage, EncryptionKey = encryptedPassword, MessageHash = hash
});
// Act:
repository.AddRequest(request);
var retrieved = repository.GetRequest(request.KeyToken);
var retrievedMessage = retrieved.Messages.First();
string messageDecryptionKey;
var decryptedMessage = crypto.DecryptMessageWithKey(keys.PrivateKey, retrievedMessage.MessageData,
retrievedMessage.EncryptionKey,
retrievedMessage.MessageHash, out messageDecryptionKey);
// Assert:
Assert.AreEqual(message, decryptedMessage);
}
public void Message_Encrypt_Decrypt_ReturnsOriginalValue()
{
// Arrange
var crypto = new AsymmetricCryptoProvider();
var key = AsymmetricCryptoProvider.GenerateKeys();
string hash;
string encryptedPassword;
// Act
var encryptedMessage = crypto.EncryptMessageWithKey(secret, key.PublicKey, out encryptedPassword, out hash);
string messageDecryptionKey;
var decryptedSecret = crypto.DecryptMessageWithKey(key.PrivateKey, encryptedMessage, encryptedPassword, hash, out messageDecryptionKey);
// Assert
Assert.AreEqual(secret, decryptedSecret);
Assert.AreEqual(SymmetricCryptoProvider.GetSecureHashForString(secret), hash, "hashes do not match");
}
private static void AttachDataToKey(string token, string compressedMessage, bool isFile, string encryptionKey = null)
{
string hash = null;
string encryptedPassword;
var db = new CryptAByteContext();
var request = db.Keys.SingleOrDefault(key => key.KeyToken == token);
string encryptedMessage;
if (string.IsNullOrWhiteSpace(encryptionKey))
{
var crypto = new AsymmetricCryptoProvider();
encryptedMessage = crypto.EncryptMessageWithKey(compressedMessage, request.PublicKey, out encryptedPassword,
out hash);
}
else
{
encryptedMessage = compressedMessage;
encryptedPassword = encryptionKey;
}
if (request.Messages == null)
{
request.Messages = new Collection <Message>();
}
request.Messages.Add(new Message()
{
MessageData = encryptedMessage,
EncryptionKey = encryptedPassword,
MessageHash = hash,
Created = DateTime.Now,
IsFile = isFile
});
db.SaveChanges();
}