public SteamGuardAccount GetAccount(SecureString passkey = null, int index = 0)
{
SteamGuardAccount account = new SteamGuardAccount();
if (passkey == null && Encrypted)
{
return(account);
}
if (!UseMaFiles)
{
credMan = CredManifest.GetManifest();
string fileText = credMan.Entries[index].Contents;
fileText = Encryptor.DPAPIUnprotect(fileText, Encryptor.AccountEntropy);
if (fileText.StartsWith("Encrypted"))
{
string decryptedText = Encryptor.DecryptData(passkey, credMan.Entries[index].Salt, credMan.Entries[index].IV, fileText.Remove(0, 9)); if (decryptedText == null)
{
return(account);
}
fileText = decryptedText;
}
var acc = JsonConvert.DeserializeObject <SteamGuardAccount>(fileText);
if (acc == null)
{
return(account);
}
return(acc);
}
else
{
if (passkey == null && Encrypted)
{
return(new SteamGuardAccount());
}
string maDir = GetExecutableDir() + "/maFiles/";
string fileText = File.ReadAllText(maDir + Entries[index].FileName);
fileText = Encryptor.DPAPIUnprotect(fileText, Encryptor.AccountEntropy);
if (fileText.StartsWith("Encrypted"))
{
string decryptedText = Encryptor.DecryptData(passkey, Entries[index].Salt, Entries[index].IV, fileText.Remove(0, 9)); if (decryptedText == null)
{
return(account);
}
fileText = decryptedText;
}
var acc = JsonConvert.DeserializeObject <SteamGuardAccount>(fileText);
if (acc == null)
{
return(account);
}
return(acc);
}
}
public bool ChangeEncryptionKey(SecureString oldKey, SecureString newKey)
{
if (Encrypted)
{
if (!VerifyPasskey(oldKey))
{
return(false);
}
}
bool toEncrypt = newKey != null;
credMan = CredManifest.GetManifest();
if (UseMaFiles)
{
string maDir = GetExecutableDir() + "/maFiles/";
for (int i = 0; i < Entries.Count; i++)
{
ManifestEntry entry = Entries[i];
string filename = maDir + entry.FileName;
if (!File.Exists(filename))
{
continue;
}
string fileContents = File.ReadAllText(filename);
fileContents = Encryptor.DPAPIUnprotect(fileContents, Encryptor.AccountEntropy);
if (fileContents.StartsWith("Encrypted"))
{
fileContents = Encryptor.DecryptData(oldKey, entry.Salt, entry.IV, fileContents.Remove(0, 9));
}
string newSalt = null;
string newIV = null;
string toWriteFileContents = fileContents;
if (toEncrypt)
{
newSalt = Encryptor.GetRandomSalt();
newIV = Encryptor.GetInitializationVector();
toWriteFileContents = "Encrypted" + Encryptor.EncryptData(newKey, newSalt, newIV, fileContents);
}
if (UseDPAPI)
{
toWriteFileContents = Encryptor.DPAPIProtect(toWriteFileContents, Encryptor.AccountEntropy);
}
File.WriteAllText(filename, toWriteFileContents);
if (UseWindowsFileEncryption)
{
File.Encrypt(filename);
}
else
{
File.Decrypt(filename);
}
entry.IV = newIV;
entry.Salt = newSalt;
}
}
else
{
foreach (CredManifestEntry entry in credMan.Entries)
{
string fileContents = entry.Contents;
fileContents = Encryptor.DPAPIUnprotect(fileContents, Encryptor.AccountEntropy);
if (fileContents.StartsWith("Encrypted"))
{
fileContents = Encryptor.DecryptData(oldKey, entry.Salt, entry.IV, fileContents.Remove(0, 9));
}
string newSalt = null;
string newIV = null;
string toWriteFileContents = fileContents;
if (toEncrypt)
{
newSalt = Encryptor.GetRandomSalt();
newIV = Encryptor.GetInitializationVector();
toWriteFileContents = "Encrypted" + Encryptor.EncryptData(newKey, newSalt, newIV, fileContents);
}
else
{
entry.Encrypted = false;
}
if (UseDPAPI)
{
toWriteFileContents = Encryptor.DPAPIProtect(toWriteFileContents, Encryptor.AccountEntropy);
}
entry.Contents = toWriteFileContents;
entry.IV = newIV;
entry.Salt = newSalt;
}
credMan.Key = newKey;
credMan.Save();
}
Encrypted = toEncrypt;
Save();
return(true);
}