public void Can_Send_Encrypted_Message()
{
var client = new JsonServiceClient(Config.AbsoluteBaseUri);
var request = new HelloSecure {
Name = "World"
};
var encRequest = RsaUtils.Encrypt(request.ToJson(), SecureConfig.PublicKeyXml);
var encResponse = client.Post(new BasicEncryptedMessage
{
OperationName = typeof(HelloSecure).Name,
EncryptedBody = encRequest
});
var responseJson = RsaUtils.Decrypt(encResponse.EncryptedBody, SecureConfig.PrivateKeyXml);
var response = responseJson.FromJson <HelloSecureResponse>();
Assert.That(response.Result, Is.EqualTo("Hello, World!"));
}
public void Does_throw_on_replayed_messages()
{
var client = CreateClient();
var request = new HelloSecure {
Name = "World"
};
var aes = new AesManaged {
KeySize = AesUtils.KeySize
};
var aesKeyBytes = aes.Key.Combine(aes.IV);
var rsaEncAesKeyBytes = RsaUtils.Encrypt(aesKeyBytes, SecureConfig.PublicKeyXml);
var timestamp = DateTime.UtcNow.ToUnixTime();
var requestBody = timestamp + " POST " + typeof(HelloSecure).Name + " " + request.ToJson();
var encryptedMessage = new EncryptedMessage
{
EncryptedSymmetricKey = Convert.ToBase64String(rsaEncAesKeyBytes),
EncryptedBody = AesUtils.Encrypt(requestBody, aes.Key, aes.IV)
};
var encResponse = client.Post(encryptedMessage);
try
{
client.Post(encryptedMessage);
Assert.Fail("Should throw");
}
catch (WebServiceException ex)
{
ex.StatusDescription.Print();
var errorResponse = (EncryptedMessageResponse)ex.ResponseDto;
var responseJson = AesUtils.Decrypt(errorResponse.EncryptedBody, aes.Key, aes.IV);
var response = responseJson.FromJson <ErrorResponse>();
Assert.That(response.ResponseStatus.Message, Is.EqualTo("Nonce already seen"));
}
}
public void Does_Hybrid_RSA_Crypt_and_Auth_AES_with_HMAC_SHA256()
{
var request = new HelloSecure {
Name = "World"
};
var timestamp = DateTime.UtcNow.ToUnixTime();
var msg = timestamp + " POST " + request.GetType().Name + " " + request.ToJson();
var msgBytes = msg.ToUtf8Bytes();
AesUtils.CreateCryptAuthKeysAndIv(out var cryptKey, out var authKey, out var iv);
var encryptedBytes = AesUtils.Encrypt(msgBytes, cryptKey, iv);
var decryptedBytes = AesUtils.Decrypt(encryptedBytes, cryptKey, iv);
Assert.That(decryptedBytes, Is.EquivalentTo(msgBytes));
var authEncryptedBytes = HmacUtils.Authenticate(encryptedBytes, authKey, iv);
var cryptAuthKeys = cryptKey.Combine(authKey);
var rsaEncCryptAuthKeys = RsaUtils.Encrypt(cryptAuthKeys, SecureConfig.PublicKeyXml);
var authRsaEncCryptAuthKeys = HmacUtils.Authenticate(rsaEncCryptAuthKeys, authKey, iv);
var decryptedMsg = ValidateAndDecrypt(authRsaEncCryptAuthKeys, authEncryptedBytes);
var parts = decryptedMsg.SplitOnFirst(' ');
Assert.That(long.Parse(parts[0]), Is.EqualTo(timestamp));
parts = parts[1].SplitOnFirst(' ');
Assert.That(parts[0], Is.EqualTo("POST"));
parts = parts[1].SplitOnFirst(' ');
Assert.That(parts[0], Is.EqualTo(request.GetType().Name));
var decryptedJson = parts[1];
var decryptedRequest = decryptedJson.FromJson <HelloSecure>();
Assert.That(decryptedRequest.Name, Is.EqualTo(request.Name));
}
public object Any(HelloSecure request)
{
return(new HelloSecureResponse {
Result = "Hello, {0}!".Fmt(request.Name)
});
}