// Private Methods (2)
private void TaskAction_Decrypt()
{
DecryptionHelper.CreateDecryptionTask(this.CONTEXT,
this.SOURCE, this.DESTINATION,
this.XML)
.RunSynchronously();
}
private static void StartDecryption(CryptExecutionContext ctx)
{
var tasks = new List <Task>();
tasks.Add(DecryptionHelper.CreateDecryptionTask(ctx));
// ... and start them
foreach (var t in tasks)
{
t.Start();
}
TaskHelper.WaitAll(tasks);
}
/// <summary>
/// Decrypts an text hidden inside the image.
/// </summary>
/// <param name="image">The bytes of the image where the message is hidden.</param>
/// <param name="skipAlpha">Should the alpha channel remain untouched?.</param>
/// <returns>An array of bytes with the text that was hidden.</returns>
private static byte[] DecryptStringMessage(byte[] image, bool skipAlpha)
{
//Transfome bytes to bits.
BitArray imageBits = new BitArray(image);
//Get the size of the message we'll have to decrypt, at the beginning of the image.
int messageSize = DecryptionHelper.GetMessageSize(imageBits, 0, skipAlpha);
//Empty array of bits the size of the message size we just got.
BitArray messageBits = new BitArray(messageSize);
//Decrypts the message.
byte[] messageDecrypted = DecryptionHelper.GetDecryptedMessage(imageBits, messageBits,
SizeInfo.Text, skipAlpha);
return(messageDecrypted);
}
/// <summary>
/// Decrypts an image hidden inside the image.
/// </summary>
/// <param name="image">The bytes of the image where the message is hidden.</param>
/// <param name="skipAlpha">Should the alpha channel remain untouched?.</param>
/// <returns>An array of bytes with the image that was hidden.</returns>
private static byte[] DecryptImageMessage(byte[] image, bool skipAlpha)
{
//Transform bytes to bits.
BitArray imageBits = new BitArray(image);
//Get the size of the message we'll have to decrypt, at the beginning of the image.
Steganography.embeddedWidth = DecryptionHelper.GetMessageSize(imageBits, 0, skipAlpha);
Steganography.embeddedHeight = DecryptionHelper.GetMessageSize(imageBits, 24 * 8, skipAlpha);
//Empty array of bits the size of the message size we just got.
BitArray messageBits = new BitArray(Steganography.embeddedWidth * Steganography.embeddedHeight * 32);
//Decrypts the message.
byte[] messageDecrypted = DecryptionHelper.GetDecryptedMessage(imageBits, messageBits,
SizeInfo.Image, skipAlpha);
return(messageDecrypted);
}
static ExternalServiceBase()
{
string cesEncryptedPwd = ConfigurationManager.AppSettings.Get("CESServiceAccountPassword");
if (!string.IsNullOrEmpty(cesEncryptedPwd))
{
CESPassword = DecryptionHelper.DecryptString(cesEncryptedPwd);
}
string svcEncryptedPwd = ConfigurationManager.AppSettings.Get("ServiceAccountPassword");
if (!string.IsNullOrEmpty(svcEncryptedPwd))
{
SvcPassword = DecryptionHelper.DecryptString(svcEncryptedPwd);
}
System.Net.ServicePointManager.ServerCertificateValidationCallback +=
(se, cert, chain, sslerror) => { return(true); };
}
// Private Methods (2)
private void TaskAction_Decrypt()
{
var pwd = Convert.FromBase64String(this.XML.Attribute("pwd").Value.Trim());
using (var srcStream = this.SOURCE.OpenRead())
{
using (var destStream = new FileStream(this.DESTINATION.FullName,
FileMode.CreateNew,
FileAccess.ReadWrite))
{
DecryptionHelper.DecryptStream(srcStream, destStream,
pwd, this.SALT);
}
}
FileSystemHelper.TrySetCreationTimeUtc(this.DESTINATION,
new DateTimeOffset(ticks: long.Parse(this.XML.Attribute("created").Value.Trim()),
offset: TimeSpan.Zero));
FileSystemHelper.TrySetLastWriteTimeUtc(this.DESTINATION,
new DateTimeOffset(ticks: long.Parse(this.XML.Attribute("lastWrite").Value.Trim()),
offset: TimeSpan.Zero));
}
public async Task <ActionResult <string> > Post([FromQuery] string validationToken = null)
{
// handle validation
if (!string.IsNullOrEmpty(validationToken))
{
_logger.LogInformation($"Received Token: '{validationToken}'");
return(Ok(validationToken));
}
// handle notifications
using (StreamReader reader = new StreamReader(Request.Body))
{
string content = await reader.ReadToEndAsync();
Console.WriteLine(content);
var notifications = JsonConvert.DeserializeObject <Model.NotificationModels.Notifications>(content);
// var filePath = Path.Combine(_rootPath, _config["CertFilePath"]);
// var certData = System.IO.File.ReadAllBytes(filePath);
foreach (var notifi in notifications.Items)
{
// Initialize with the private key that matches the encryptionCertificateId.
var data = DecryptionHelper.GetDecryptedContent(notifi.EncryptedContent,
_config["WEBSITE_LOAD_CERTIFICATES"]);
_logger.LogWarning("Received message: " + data);
var message = JsonConvert.DeserializeObject <ChatMessage>(data);
if (!_processedMessage.TryAdd(message.WebUrl, true))
{
_logger.LogWarning("Multiple request received: " + message.WebUrl);
_logger.LogWarning("_processedMessage.Count: " + _processedMessage.Count);
continue;
}
var question = _messageParser.Parse(message);
if (question.Forum == null) // Don't process if Forum is not populated.
{
_logger.LogWarning("Skipped message: " + data);
continue;
}
}
}
return(Ok());
}
public dynamic GetDesDecrypt(string Text)
{
dynamic result = DecryptionHelper.DesDecrypt(Text);
return(result);
}
