public static SecureString GetPassword(string username)
{
lock (_lock)
{
if (cache != null)
{
SecureString s;
if (cache.TryGetValue(username, out s))
{
return(s);
}
}
else
{
cache = new Dictionary <string, SecureString>(StringComparer.OrdinalIgnoreCase);
}
if (state != StorageState.None)
{
try
{
var i = GetStorage().Read <DataItem>(username);
using (var crypto = new Cryptography.Crypto())
{
SecureString s;
if (i.Data.Length > 0)
{
var data = crypto.Decrypt(i.Data);
try
{
s = FromByteArray(data);
}
finally
{
Array.Clear(data, 0, data.Length);
}
}
else
{
s = new SecureString();
s.MakeReadOnly();
}
cache.Add(username, s);
return(s);
}
}
catch (Exception e)
{
Util.Logging.Log(e);
}
}
}
return(null);
}
private static bool Upgrade(int header, ushort version)
{
List <DataItem> items;
using (BinaryReader reader = new BinaryReader(new BufferedStream(File.OpenRead(StoragePath), 1024)))
{
if (reader.ReadUInt16() != FILE_HEADER_V0)
{
return(false);
}
var key = new byte[] { 99, 12, 55, 17, 45, 97, 83, 64, 38 };
var count = reader.ReadUInt16();
var scope = Settings.EncryptionScope.CurrentUser;
var o = Settings.Encryption.Value;
if (o != null)
{
scope = o.Scope;
}
items = new List <DataItem>(count + 1);
using (var crypto = new Cryptography.Crypto())
{
for (int i = 0; i < count; i++)
{
var name = reader.ReadString();
var length = reader.ReadUInt16();
var data = reader.ReadBytes(length);
data = ProtectedData.Unprotect(data, key, DataProtectionScope.CurrentUser);
try
{
items.Add(new DataItem()
{
ID = name,
Data = crypto.Compress(crypto.Encrypt(scope, data), Cryptography.Crypto.CryptoCompressionFlags.All),
});
}
finally
{
Array.Clear(data, 0, data.Length);
}
}
}
}
if (items.Count == 0)
{
return(false);
}
GetStorage().Write <DataItem>(items);
return(true);
}
private static void OnCryptoChanged()
{
var store = GetStorage();
var items = new List <DataItem>();
var o = Settings.Encryption.Value;
var scope = o != null ? o.Scope : Settings.EncryptionScope.CurrentUser;
using (var crypto = new Cryptography.Crypto())
{
try
{
foreach (var item in store.ReadAll <DataItem>())
{
try
{
if (crypto.GetScope(item.Data) == scope)
{
continue;
}
var data = crypto.Decrypt(item.Data);
try
{
items.Add(new DataItem()
{
ID = item.ID,
Data = crypto.Compress(crypto.Encrypt(scope, data), Cryptography.Crypto.CryptoCompressionFlags.All),
});
}
finally
{
Array.Clear(data, 0, data.Length);
}
}
catch (Exception e)
{
Util.Logging.Log(e);
}
}
}
catch { }
}
if (items.Count > 0)
{
store.Write <DataItem>(items);
}
}
public static void SetPassword(string username, SecureString password)
{
lock (_lock)
{
try
{
if (cache == null)
{
cache = new Dictionary <string, SecureString>(StringComparer.OrdinalIgnoreCase);
}
var s = password.Copy();
s.MakeReadOnly();
cache[username] = s;
}
catch (Exception ex)
{
Util.Logging.Log(ex);
}
if (state != StorageState.None)
{
try
{
byte[] data;
if (password.Length > 0)
{
var buffer = ToByteArray(password);
try
{
var scope = Settings.EncryptionScope.CurrentUser;
var o = Settings.Encryption.Value;
if (o != null)
{
scope = o.Scope;
}
using (var crypto = new Cryptography.Crypto())
{
data = crypto.Compress(crypto.Encrypt(scope, buffer), Cryptography.Crypto.CryptoCompressionFlags.All);
}
}
finally
{
Array.Clear(buffer, 0, buffer.Length);
}
}
else
{
data = new byte[0];
}
var item = new DataItem()
{
ID = username,
Data = data,
};
GetStorage().Write <DataItem>(item);
}
catch (Exception e)
{
Util.Logging.Log(e);
}
}
}
}
