public static string DecryptFile(string filename, string encryptedContent)
{
if (encryptedContent == null || encryptedContent.Length == 0)
{
return(null);
}
string encryptedString = EncryptedPlayerPrefs.GetEncryptedString("__shhh__" + filename);
if (encryptedString != null && encryptedString.Length > 0)
{
return(AesCipher.Decrypt(encryptedContent, encryptedString));
}
return(null);
}
protected virtual void LoadOrGenerateSecondLevel(string secondaryPrefix, int maxSecondLevelKeys)
{
string masterKeyName = GetMasterKeyName();
m_internalKeys = new Dictionary <string, Type>();
m_internalKeys[masterKeyName] = s_intType;
if (PlayerPrefs.HasKey(masterKeyName))
{
int @int = PlayerPrefs.GetInt(masterKeyName);
string masterKey = GetMasterKey(@int);
IList <string> list = new List <string>();
try
{
for (int i = 0; i < maxSecondLevelKeys; i++)
{
string encryptedKey = GetEncryptedKey(secondaryPrefix + (i + 1));
m_internalKeys[encryptedKey] = s_stringType;
string @string = PlayerPrefs.GetString(encryptedKey);
string item = AesCipher.Decrypt(@string, masterKey);
list.Add(item);
}
m_secondLevel = new string[list.Count];
list.CopyTo(m_secondLevel, 0);
}
catch (ArgumentNullException)
{
m_secondLevel = null;
}
}
if (m_secondLevel == null)
{
System.Random random = new System.Random();
int @int = random.Next();
PlayerPrefs.SetInt(masterKeyName, @int);
string masterKey = GetMasterKey(@int);
m_secondLevel = new string[maxSecondLevelKeys];
for (int i = 0; i < m_secondLevel.Length; i++)
{
string encryptedKey = GetEncryptedKey(secondaryPrefix + (i + 1));
m_internalKeys[encryptedKey] = s_stringType;
m_secondLevel[i] = Guid.NewGuid().ToString();
string @string = AesCipher.Encrypt(m_secondLevel[i], masterKey);
PlayerPrefs.SetString(encryptedKey, @string);
}
PlayerPrefs.Save();
}
}
protected string GetDecryptedValue(string prefsKey)
{
byte[] keyHash = GetKeyHash(prefsKey);
string encryptionKey = GetEncryptionKey(keyHash);
string encryptedKey = GetEncryptedKey(keyHash);
if (!PlayerPrefs.HasKey(encryptedKey))
{
return(null);
}
string @string = PlayerPrefs.GetString(encryptedKey);
if (@string == null || @string.Length == 0)
{
return(@string);
}
return(AesCipher.Decrypt(@string, encryptionKey));
}