public static RequestData DecryptMessage(EncryptedMessage msg, byte[] key)
{
try
{
if (msg == null)
{
throw new ArgumentNullException("msg");
}
if (key == null)
{
throw new ArgumentNullException("key");
}
using (var aes = Aes.Create())
{
aes.IV = Convert.FromBase64String(msg.IV);
aes.Key = key;
using (var decryptor = aes.CreateDecryptor(aes.Key, aes.IV))
{
using (var ms = new MemoryStream(Convert.FromBase64String(msg.Message)))
{
using (var cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Read))
{
using (var sr = new StreamReader(cs))
{
var json = sr.ReadToEnd();
var data = JsonConvert.DeserializeObject <RequestData>(json);
return(data);
}
}
}
}
}
} catch (Exception)
{
MessageBox.Show("Received a request from the browser addon which could not be read. Please consider redo the setup process in the addon.", "Could not read browser addon request", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
return(null);
}
private void EndGetContext(IAsyncResult ar)
{
try
{
var ctx = _server.EndGetContext(ar);
_server.BeginGetContext(EndGetContext, null);
lock (workerLock)
{
if (ctx.Request.HttpMethod == "GET" && ctx.Request.RawUrl == "/connectivity/")
{
ctx.Response.StatusCode = _pHost.Database.IsOpen ? 200 : 401;
ctx.Response.OutputStream.Close();
return;
}
if (ctx.Request.HttpMethod != "POST")
{
ctx.Response.StatusCode = 405;
ctx.Response.OutputStream.Close();
return;
}
if (ctx.Request.RawUrl != "/")
{
ctx.Response.StatusCode = 400;
ctx.Response.OutputStream.Close();
return;
}
EncryptedMessage encReqData = null;
RequestData reqData = null;
try
{
var rawData = new StreamReader(ctx.Request.InputStream).ReadToEnd();
Debug.WriteLine($"Received: {rawData}");
encReqData = JsonConvert.DeserializeObject <EncryptedMessage>(rawData);
}
catch (Exception)
{
ctx.Response.StatusCode = 400;
ctx.Response.OutputStream.Close();
return;
}
if (encReqData == null || string.IsNullOrEmpty(encReqData.IV) || string.IsNullOrEmpty(encReqData.Message))
{
ctx.Response.StatusCode = 400;
ctx.Response.OutputStream.Close();
return;
}
reqData = CryptoHelper.DecryptMessage(encReqData, _plugin.CryptoKey);
if (reqData == null || string.IsNullOrEmpty(reqData.Url))
{
ctx.Response.StatusCode = 400;
ctx.Response.OutputStream.Close();
return;
}
var responseData = FindCredentials(reqData.Url);
var encResponseData = CryptoHelper.EncryptMessage(responseData, _plugin.CryptoKey);
var response = JsonConvert.SerializeObject(encResponseData);
var writer = new StreamWriter(ctx.Response.OutputStream);
writer.Write(response);
Debug.WriteLine($"Returned: {response}");
ctx.Response.StatusCode = 200;
writer.Close();
writer.Dispose();
}
}
catch (HttpListenerException)
{
//system is terminating, so... that's right as it is ;)
}
}
