private byte[] DoCipherOperation(Cipher cipher, byte[] data)
{
Requires.NotNull(cipher, nameof(cipher));
Requires.NotNull(data, nameof(data));
// Android returns null when given an empty input.
if (this.Padding != SymmetricAlgorithmPadding.PKCS7 && data.Length == 0)
{
return data;
}
try
{
return this.CanStreamAcrossTopLevelCipherOperations
? cipher.Update(data)
: cipher.DoFinal(data);
}
catch (IllegalBlockSizeException ex)
{
throw new ArgumentException("Illegal block size.", ex);
}
}
