private ICryptoTransform CreateEncryptor(byte[] key, byte[] IV, EncryptModeEnum encryptMode, AesKeySize keySize = AesKeySize.Aes128, PaddingMode paddingMode = PaddingMode.PKCS7)
{
if (EncryptModeEnum.CBC.Equals(encryptMode))
{
return(AesCBCEncryptor.CreateEncryptor(key, IV, keySize, paddingMode));
}
if (EncryptModeEnum.CTR.Equals(encryptMode))
{
return(AesCTREncryptor.CreateEncryptor(key, IV, keySize));
}
throw new Exception($"Encryption Mode {encryptMode} not valid");
}
private static AesSettings Create(IConfigurationSection section)
{
EncryptModeEnum mode = section["Mode"].ToEnum <EncryptModeEnum>();
switch (mode)
{
case EncryptModeEnum.ECB:
return(CreateEcb(section));
case EncryptModeEnum.CBC:
case EncryptModeEnum.CTR:
case EncryptModeEnum.GCM:
return(CreateDefault(section));
default:
throw new ArgumentOutOfRangeException($"Argumendt {mode}");
}
}
public IEncryptorFactory CreateFactory(EncryptModeEnum mode, byte[] aad = null)
{
var settings = AesSettings.GetEnumerator();
switch (mode)
{
case EncryptModeEnum.ECB:
return(new EcbEncryptorFactory(settings.FirstOrDefault(s => EncryptModeEnum.ECB.Equals(s.Mode))));
case EncryptModeEnum.CBC:
return(new CbcEncryptorFactory(settings.FirstOrDefault(s => EncryptModeEnum.CBC.Equals(s.Mode))));
case EncryptModeEnum.CTR:
return(new CtrEncryptorFactory(settings.FirstOrDefault(s => EncryptModeEnum.CTR.Equals(s.Mode))));
case EncryptModeEnum.GCM:
return(new GcmEncryptorFactory(settings.FirstOrDefault(s => EncryptModeEnum.GCM.Equals(s.Mode)), aad));
default:
throw new ArgumentOutOfRangeException($"Invalid Mode {mode}");
}
}
