/// <summary>
/// Returns a platform-specific algorithm that conforms to the prescribed platform-neutral algorithm.
/// </summary>
/// <param name="algorithm">The PCL algorithm.</param>
/// <returns>
/// The platform-specific algorithm.
/// </returns>
private static Platform.SymmetricAlgorithm GetAlgorithm(SymmetricAlgorithm algorithm)
{
#if SILVERLIGHT || __IOS__
switch (algorithm)
{
case SymmetricAlgorithm.AesCbcPkcs7:
return new Platform.AesManaged();
default:
throw new NotSupportedException();
}
#else
Platform.SymmetricAlgorithm platform = Platform.SymmetricAlgorithm.Create(
algorithm.GetName().GetString());
if (platform == null)
{
throw new NotSupportedException();
}
platform.Mode = GetMode(algorithm);
platform.Padding = GetPadding(algorithm);
return platform;
#endif
}