127 lines
4.3 KiB
C#
127 lines
4.3 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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using System.Text;
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using System.Threading.Tasks;
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namespace NSspi
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{
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/// <summary>
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/// Queries information about security packages.
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/// </summary>
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public static class PackageSupport
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{
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/// <summary>
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/// Returns the properties of the named package.
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/// </summary>
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/// <param name="packageName">The name of the package.</param>
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/// <returns></returns>
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public static SecPkgInfo GetPackageCapabilities( string packageName )
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{
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SecPkgInfo info;
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SecurityStatus status = SecurityStatus.InternalError;
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IntPtr rawInfoPtr;
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rawInfoPtr = new IntPtr();
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info = new SecPkgInfo();
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RuntimeHelpers.PrepareConstrainedRegions();
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try
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{ }
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finally
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{
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status = NativeMethods.QuerySecurityPackageInfo( packageName, ref rawInfoPtr );
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if ( rawInfoPtr != IntPtr.Zero )
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{
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try
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{
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if ( status == SecurityStatus.OK )
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{
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// This performs allocations as it makes room for the strings contained in the SecPkgInfo class.
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Marshal.PtrToStructure( rawInfoPtr, info );
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}
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}
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finally
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{
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NativeMethods.FreeContextBuffer( rawInfoPtr );
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}
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}
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}
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if( status != SecurityStatus.OK )
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{
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throw new SSPIException( "Failed to query security package provider details", status );
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}
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return info;
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}
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/// <summary>
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/// Returns a list of all known security package providers and their properties.
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/// </summary>
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/// <returns></returns>
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public static SecPkgInfo[] EnumeratePackages()
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{
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SecurityStatus status = SecurityStatus.InternalError;
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SecPkgInfo[] packages = null;
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IntPtr pkgArrayPtr;
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IntPtr pkgPtr;
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int numPackages = 0;
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int pkgSize = Marshal.SizeOf( typeof(SecPkgInfo) );
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pkgArrayPtr = new IntPtr();
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RuntimeHelpers.PrepareConstrainedRegions();
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try { }
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finally
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{
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status = NativeMethods.EnumerateSecurityPackages( ref numPackages, ref pkgArrayPtr );
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if( pkgArrayPtr != IntPtr.Zero )
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{
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try
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{
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if( status == SecurityStatus.OK )
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{
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// Bwooop Bwooop Alocation Alert
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// 1) We allocate the array
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// 2) We allocate the individual elements in the array (they're class objects).
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// 3) We allocate the strings in the individual elements in the array when we
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// call Marshal.PtrToStructure()
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packages = new SecPkgInfo[numPackages];
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for( int i = 0; i < numPackages; i++ )
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{
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packages[i] = new SecPkgInfo();
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}
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for( int i = 0; i < numPackages; i++ )
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{
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pkgPtr = IntPtr.Add( pkgArrayPtr, i * pkgSize );
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Marshal.PtrToStructure( pkgPtr, packages[i] );
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}
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}
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}
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finally
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{
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NativeMethods.FreeContextBuffer( pkgArrayPtr );
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}
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}
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}
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if( status != SecurityStatus.OK )
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{
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throw new SSPIException( "Failed to enumerate security package providers", status );
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}
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return packages;
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}
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}
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}
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