securitystruct.cs

破解的飞信源代码

namespace Imps.Client.Utils
{
    using System;
    using System.Runtime.InteropServices;

    public class SecurityStruct : IDisposable
    {
        private IntPtr lpSecurityDescriptor;
        private IntPtr pSa;
        private const int SECURITY_DESCRIPTOR_REVISION = 1;

        public IntPtr AnonymousSA()
        {
            return this.AnonymousSA(false);
        }

        public IntPtr AnonymousSA(bool bInheritHandle)
        {
            this.Close();
            SECURITY_ATTRIBUTES structure = new SECURITY_ATTRIBUTES();
            SECURITY_DESCRIPTOR security_descriptor = new SECURITY_DESCRIPTOR();
            this.lpSecurityDescriptor = Marshal.AllocCoTaskMem(Marshal.SizeOf(security_descriptor));
            Marshal.StructureToPtr(security_descriptor, this.lpSecurityDescriptor, false);
            if (!InitializeSecurityDescriptor(this.lpSecurityDescriptor, 1))
            {
                throw new ApplicationException("InitializeSecurityDescriptor invoked fail");
            }
            if (!SetSecurityDescriptorDacl(this.lpSecurityDescriptor, 1, IntPtr.Zero, 0))
            {
                throw new ApplicationException("SetSecurityDescriptorDacl invoked fail");
            }
            structure.bInheritHandle = bInheritHandle ? 1 : 0;
            structure.nLength = (uint) Marshal.SizeOf(structure);
            structure.lpSecurityDescriptor = this.lpSecurityDescriptor;
            this.pSa = Marshal.AllocCoTaskMem(Marshal.SizeOf(structure));
            Marshal.StructureToPtr(structure, this.pSa, false);
            return this.pSa;
        }

        public void Close()
        {
            if (this.lpSecurityDescriptor != IntPtr.Zero)
            {
                Marshal.FreeCoTaskMem(this.lpSecurityDescriptor);
                this.lpSecurityDescriptor = IntPtr.Zero;
            }
            if (this.pSa != IntPtr.Zero)
            {
                Marshal.FreeCoTaskMem(this.pSa);
                this.pSa = IntPtr.Zero;
            }
        }

        public void Dispose()
        {
            this.Close();
        }

        [DllImport("advapi32.dll", SetLastError=true)]
        private static extern bool InitializeSecurityDescriptor(IntPtr pSecurityDescriptor, uint dwRevision);
        [DllImport("advapi32.dll", SetLastError=true)]
        private static extern bool SetSecurityDescriptorDacl(IntPtr pSecurityDescriptor, int bDaclPresent, IntPtr pDacl, int bDaclDefaulted);
    }
}