/// <summary>
/// This function can be used, if an API key must be stored inside the application code,
/// so it doesn't show up in plain text.
/// </summary>
/// <param name="plainMessage">The text to hide.</param>
/// <param name="obfuscationKey">Key to use for obfuscation, this key is usually hard coded
/// in the application.</param>
/// <param name="randomSource">A cryptographically random source.</param>
/// <returns>Obfuscated message.</returns>
public static byte[] Obfuscate(byte[] plainMessage, SecureString obfuscationKey, ICryptoRandomSource randomSource)
{
ICryptor encryptor = new Cryptor(CryptorObfuscationPackageName, randomSource);
return(encryptor.Encrypt(
plainMessage,
obfuscationKey,
KeyDerivationCostType.Low,
"xchacha20_poly1305"));
}
/// <summary>
/// Reverses a key obfuscated with <see cref="Obfuscate(byte[], SecureString, ICryptoRandomSource)"/>
/// to its original plain text.
/// </summary>
/// <param name="obfuscatedMessage">Obfuscated text.</param>
/// <param name="obfuscationKey">Key to use for obfuscation, this key is usually hard coded
/// in the application.</param>
/// <returns>Original plain message.</returns>
public static byte[] Deobfuscate(byte[] obfuscatedMessage, SecureString obfuscationKey)
{
ICryptor encryptor = new Cryptor(CryptorObfuscationPackageName, null);
return(encryptor.Decrypt(obfuscatedMessage, obfuscationKey));
}