public static async Task <string> DecryptUtf8ToBase64Async(
this ISymmetricCryptoProvider provider,
string message,
byte[] key,
byte[] iv)
{
if (string.IsNullOrEmpty(message))
{
return(string.Empty);
}
return(Convert.ToBase64String(await provider.DecryptBytesAsync(Encoding.UTF8.GetBytes(message), key, iv)));
}