internal static string GetValueFromKey(string key, string value)
{
byte[] bytes = CryptoPrefsDecryptor.s_defaultEncoding.GetBytes(UnWrapKey(key));
string result;
try
{
string @string = value;
{
byte[] array = Convert.FromBase64String(@string);
{
byte[] buffer = CryptoPrefsDecryptor.GetBuffer(array.Length - CryptoPrefsDecryptor._aead.MinOverhead);
try
{
ArraySegment <byte> arraySegment = CryptoPrefsDecryptor._aead.Decrypt(new ArraySegment <byte>(array), bytes, buffer);
string string2 = CryptoPrefsDecryptor.s_defaultEncoding.GetString(arraySegment.Array, arraySegment.Offset, arraySegment.Count);
result = string2;
}
finally
{
Array.Clear(buffer, 0, buffer.Length);
}
}
}
}
catch (Exception message)
{
result = message.StackTrace;
}
return(result);
}
internal static string UnWrapKey(string key)
{
string key1 = key.Replace("AEAD:", "").Replace(" ", "+");
byte[] keyBytes = CryptoPrefsDecryptor.s_defaultEncoding.GetBytes(key1);
byte[] buffer = CryptoPrefsDecryptor.GetBuffer(keyBytes.Length + CryptoPrefsDecryptor._aead.MaxOverhead);
string result2;
try
{
byte[] text = Convert.FromBase64String(key1);
byte[] inArray = CryptoPrefsDecryptor._aesFacade.Decrypt(text);
String result = Encoding.UTF8.GetString(inArray);
result2 = result;
}
catch (Exception message)
{
string text2 = Convert.ToBase64String(keyBytes);
result2 = message.StackTrace;
}
finally
{
Array.Clear(buffer, 0, buffer.Length);
}
return(result2);
}