public AppConfigMonitoringAgentConfiguration()
{
MongoConnectionString = ConfigurationManager.ConnectionStrings["mongo"].ConnectionString;
CustomerId = ConfigurationManager.AppSettings["customer-id"];
var publicKey = ConfigurationManager.AppSettings["customer-key"];
Key = AsymmetricEncryptionKey.CreateFromString(publicKey, false);
ServerAddress = ConfigurationManager.AppSettings["server-address"].TrimEnd('/', '\\');
MongoLogDatabaseList = new List <MongoLogDatabase>();
foreach (var mongoLogSetting in ConfigurationManager.AppSettings
.AllKeys.Where(k => k.StartsWith("mongo-log")))
{
var setting = ConfigurationManager.AppSettings[mongoLogSetting];
var splittedSetting = setting.Split('|');
MongoLogDatabaseList.Add(new MongoLogDatabase()
{
ConnectionString = splittedSetting[0],
CollectionName = splittedSetting[1],
});
}
UploadQueueFolder = new DirectoryInfo(ConfigurationManager.AppSettings["upload-temp-folder"]);
if (!UploadQueueFolder.Exists)
{
Directory.CreateDirectory(UploadQueueFolder.FullName);
}
}
public static Byte[] Decrypt(AsymmetricEncryptionKey key, Byte[] data)
{
using (var rsa = key.GetProvider())
{
return rsa.Decrypt(data, true);
}
}
public static EncryptionKey Decrypt(AsymmetricEncryptionKey asymmetricKey, EncryptionKey encryptedSimmetricKey)
{
var IV = Decrypt(asymmetricKey, encryptedSimmetricKey.IV);
var Key = Decrypt(asymmetricKey, encryptedSimmetricKey.Key);
return(new EncryptionKey()
{
IV = IV, Key = Key
});
}
public static EncryptionKey Encrypt(AsymmetricEncryptionKey asymmetricKey, EncryptionKey symmetricKey)
{
var IV = Encrypt(asymmetricKey, symmetricKey.IV);
var Key = Encrypt(asymmetricKey, symmetricKey.Key);
return(new EncryptionKey()
{
IV = IV, Key = Key
});
}
public static AsymmetricEncryptionKey GenerateAsimmetricKey()
{
//Generate a public/private key pair.
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider())
{
//Save the public key information to an RSAParameters structure.
AsymmetricEncryptionKey key = new AsymmetricEncryptionKey(RSA);
return key;
}
}
private void DecryptFile(string tempFolder, string keyFile, string encryptedFile, Customer customer)
{
var encryptionKeyString = File.ReadAllText(keyFile);
var encryptedKey = EncryptionKey.CreateFromSerializedString(encryptionKeyString);
var asymmetricKey = AsymmetricEncryptionKey.CreateFromString(customer.PrivateKey, true);
var decryptedKey = EncryptionUtils.Decrypt(asymmetricKey, encryptedKey);
//now we can decrypt
var decryptedFileName = Path.Combine(tempFolder, "decrypted.zip");
EncryptionUtils.DecryptFile(decryptedKey, encryptedFile, decryptedFileName);
Logger.DebugFormat("Decrypted file {0} ", decryptedFileName);
//now we can unzip
ZipFile.ExtractToDirectory(decryptedFileName, tempFolder);
Logger.DebugFormat("Unzipped file {0} ", decryptedFileName);
}
/// <summary>
/// Encrypt a file generating new simmetric key, the simmetric key is then
/// encrypted with an asimmetric key
/// </summary>
/// <param name="fileName"></param>
/// <param name="destinationFileName"></param>
/// <param name="key"></param>
/// <returns></returns>
public static String EncryptFile(String fileName, String destinationFileName, AsymmetricEncryptionKey key)
{
var newSimmetricKey = GenerateKey();
using (FileStream sourceFs = new FileStream(fileName, FileMode.Open))
using (FileStream destinationFs = new FileStream(destinationFileName, FileMode.Create))
using (RijndaelManaged crypto = new RijndaelManaged())
{
ICryptoTransform ct = crypto.CreateEncryptor(newSimmetricKey.Key, newSimmetricKey.IV);
using (CryptoStream cs = new CryptoStream(destinationFs, ct, CryptoStreamMode.Write))
{
sourceFs.CopyTo(cs);
}
}
var encryptedKey = Encrypt(key, newSimmetricKey);
return encryptedKey.SerializeAsString();
}
public static String Decrypt(AsymmetricEncryptionKey key, String data)
{
var decrypted = Decrypt(key, HexEncoding.GetBytes(data));
return Encoding.UTF8.GetString(decrypted);
}
public static String Encrypt(AsymmetricEncryptionKey key, String data)
{
var encrypted = Encrypt(key, Encoding.UTF8.GetBytes(data));
return BitConverter.ToString(encrypted).Replace("-", "");
}
