/// <summary>
/// Perform backup on the specified media
/// </summary>
public void Backup(BackupMedia media, String password = null)
{
// Make a determination that the user is allowed to perform this action
if (AuthenticationContext.Current.Principal != AuthenticationContext.SystemPrincipal)
{
new PolicyPermission(System.Security.Permissions.PermissionState.Unrestricted, PermissionPolicyIdentifiers.ExportClinicalData).Demand();
}
// Get the output medium
var directoryName = this.GetBackupDirectory(media);
string fileName = Path.Combine(directoryName, $"sdbdc-{DateTime.Now.ToString("yyyy-MM-dd-HH-mm")}.tar");
// Confirm if the user really really wants to backup
if (String.IsNullOrEmpty(password) &&
!ApplicationContext.Current.Confirm(Strings.locale_backup_confirm))
{
return;
}
// TODO: Audit the backup to the data to the central server
AuditUtil.AuditDataExport();
// Try to backup the data
try
{
this.m_tracer.TraceInfo("Beginning backup to {0}..", fileName);
ApplicationContext.Current?.SetProgress(Strings.locale_backup, 0.25f);
// Backup folders first
var sourceDirectory = ApplicationContext.Current.ConfigurationPersister.ApplicationDataDirectory;
try
{
using (var fs = File.Create(fileName))
using (var writer = new SharpCompress.Writers.Tar.TarWriter(fs, new TarWriterOptions(SharpCompress.Common.CompressionType.None, true)))
{
this.BackupDirectory(writer, sourceDirectory, sourceDirectory);
var appInfo = new DiagnosticReport()
{
ApplicationInfo = new DiagnosticApplicationInfo(AppDomain.CurrentDomain.GetAssemblies().FirstOrDefault(o => o.DefinedTypes.Any(t => t.Name == "Program" || t.Name == "SplashActivity")) ?? typeof(SanteDBConfiguration).Assembly)
};
// Output appInfo
using (var ms = new MemoryStream())
{
XmlSerializer xsz = XmlModelSerializerFactory.Current.CreateSerializer(appInfo.GetType());
xsz.Serialize(ms, appInfo);
ms.Flush();
ms.Seek(0, SeekOrigin.Begin);
writer.Write(".appinfo.xml", ms, DateTime.Now);
}
// Output declaration statement
using (var ms = new MemoryStream(Encoding.UTF8.GetBytes($"User {(AuthenticationContext.Current?.Principal?.Identity?.Name ?? "SYSTEM")} created this backup on {DateTime.Now}. The end user was asked to confirm this decision to backup and acknolwedges all responsibilities for guarding this file.")))
writer.Write("DISCLAIMER.TXT", ms, DateTime.Now);
// Output databases
var dcc = ApplicationServiceContext.Current.GetService <IDataManagementService>();
var dbBackupLocation = dcc.Backup("");
this.BackupDirectory(writer, dbBackupLocation, dbBackupLocation);
try
{
Directory.Delete(dbBackupLocation, true);
}
catch { }
// Now include the configuration file
// HACK: This is a total hack to support restore in place
if (!String.IsNullOrEmpty(password))
{
using (var ms = new MemoryStream())
{
ApplicationServiceContext.Current.GetService <IConfigurationManager>().Configuration.Save(ms);
ms.Seek(0, SeekOrigin.Begin);
var config = SanteDBConfiguration.Load(ms); /// Load a new copy off the stream
// Set the security system not to encrypt the device secret
config.GetSection <SecurityConfigurationSection>().PlainTextSecret = true;
using (var oms = new MemoryStream())
{
config.Save(oms);
oms.Flush();
oms.Seek(0, SeekOrigin.Begin);
writer.Write("santedb.config", oms, DateTime.Now);
}
}
}
}
this.m_tracer.TraceInfo("Beginning compression {0}..", fileName);
using (var fileStream = File.Create(Path.ChangeExtension(fileName, "sdbk")))
{
Stream outStream = fileStream;
try
{
// Write header
fileStream.Write(MAGIC, 0, MAGIC.Length);
// Encrypt
if (!String.IsNullOrEmpty(password))
{
fileStream.WriteByte(1);
var cryptProvider = AesCryptoServiceProvider.Create();
var passKey = ASCIIEncoding.ASCII.GetBytes(password);
passKey = Enumerable.Range(0, 32).Select(o => passKey.Length > o ? passKey[o] : (byte)0).ToArray();
cryptProvider.Key = passKey;
cryptProvider.GenerateIV();
fileStream.Write(BitConverter.GetBytes(cryptProvider.IV.Length), 0, 4);
fileStream.Write(cryptProvider.IV, 0, cryptProvider.IV.Length);
outStream = new CryptoStream(fileStream, cryptProvider.CreateEncryptor(), CryptoStreamMode.Write);
}
else
{
fileStream.WriteByte(0);
}
using (var fs = File.OpenRead(fileName))
using (var gzs = new GZipStream(outStream, CompressionMode.Compress))
{
fs.CopyTo(gzs);
}
}
finally
{
if (outStream != fileStream)
{
outStream.Close();
}
}
}
}
finally
{
File.Delete(fileName);
}
}
catch (Exception ex)
{
this.m_tracer.TraceError("Error backing up to {0}: {1}", fileName, ex);
throw;
}
}
