using Microsoft.Win32.SafeHandles;
using System;
using System.Security;

namespace GostCryptography.Native
{
    /// <summary>
    /// Дескриптор функции хэширования криптографического провайдера
    /// </summary>
    [SecurityCritical]
    public class SafeHashHandleImpl : SafeHandleZeroOrMinusOneIsInvalid
    {
        public static SafeHashHandleImpl InvalidHandle => new SafeHashHandleImpl(IntPtr.Zero);

        public SafeHashHandleImpl() : base(true)
        {
        }

        public SafeHashHandleImpl(IntPtr handle) : base(true)
        {
            SetHandle(handle);
        }

        [SecurityCritical]
        protected override bool ReleaseHandle()
        {
            CryptoApi.CryptDestroyHash(handle);
            return true;
        }
    }
}