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GlobalAssemblyCache.cs
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/
GlobalAssemblyCache.cs
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using System;
using System.Collections.Generic;
using System.Globalization;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
namespace PowerShellGac
{
public static class GlobalAssemblyCache
{
public static IEnumerable<AssemblyName> GetAssemblies()
{
IAssemblyEnum assemblyEnum = null;
ComCheck(FusionApi.CreateAssemblyEnum(out assemblyEnum, IntPtr.Zero, null, AssemblyCacheFlags.Gac, IntPtr.Zero));
IAssemblyName fusionAssemblyName = null;
do
{
ComCheck(assemblyEnum.GetNextAssembly(IntPtr.Zero, out fusionAssemblyName, 0));
if (fusionAssemblyName != null)
{
yield return new AssemblyName(GlobalAssemblyCache.GetDisplayName(fusionAssemblyName));
}
} while (fusionAssemblyName != null);
}
public static String GetAssemblyCacheClr2Path()
{
int bufferSize = 512;
StringBuilder buffer = new StringBuilder(bufferSize);
int hResult = FusionApi.GetCachePath(AssemblyCacheFlags.Root, buffer, ref bufferSize);
if ((uint)hResult == 0x8007007A) // ERROR_INSUFFICIENT_BUFFER
{
buffer = new StringBuilder(bufferSize);
ComCheck(FusionApi.GetCachePath(AssemblyCacheFlags.Root, buffer, ref bufferSize));
}
else
{
ComCheck(hResult);
}
return buffer.ToString();
}
public static String GetAssemblyCacheClr4Path()
{
int bufferSize = 512;
StringBuilder buffer = new StringBuilder(bufferSize);
int hResult = FusionApi.GetCachePath(AssemblyCacheFlags.RootEx, buffer, ref bufferSize);
if ((uint)hResult == 0x8007007A) // ERROR_INSUFFICIENT_BUFFER
{
buffer = new StringBuilder(bufferSize);
ComCheck(FusionApi.GetCachePath(AssemblyCacheFlags.RootEx, buffer, ref bufferSize));
}
else
{
ComCheck(hResult);
}
return buffer.ToString();
}
public static void InstallAssembly(String path, InstallReference reference, bool force)
{
if (path == null)
{
throw new ArgumentNullException("path");
}
AssemblyCommitFlags flags;
if (force)
{
flags = AssemblyCommitFlags.ForceRefresh;
}
else
{
flags = AssemblyCommitFlags.Refresh;
}
FusionInstallReference fusionReference = null;
if (reference != null)
{
if (!reference.CanBeUsed())
{
throw new ArgumentException("InstallReferenceType can not be used", "reference");
}
fusionReference = new FusionInstallReference(reference.Type, reference.Identifier, reference.Description);
}
var assemblyCache = GetAssemblyCache();
ComCheck(assemblyCache.InstallAssembly((int)flags, path, fusionReference));
}
public static UninstallResult UninstallAssembly(AssemblyName assemblyName, InstallReference reference)
{
if (assemblyName == null)
{
throw new ArgumentNullException("assemblyName");
}
if (!assemblyName.IsFullyQualified())
{
throw new ArgumentOutOfRangeException("assemblyName", assemblyName, "Must be a fully qualified assembly name");
}
FusionInstallReference fusionReference = null;
if (reference != null)
{
if (!reference.CanBeUsed())
{
throw new ArgumentException("InstallReferenceType can not be used", "reference");
}
fusionReference = new FusionInstallReference(reference.Type, reference.Identifier, reference.Description);
}
var assemblyCache = GetAssemblyCache();
AssemblyCacheUninstallDisposition disposition = AssemblyCacheUninstallDisposition.Uninstalled;
ComCheck(assemblyCache.UninstallAssembly(0, assemblyName.GetFullyQualifiedName(), fusionReference, out disposition));
return (UninstallResult)disposition;
}
public static IEnumerable<InstallReference> GetInstallReferences(AssemblyName assemblyName)
{
IAssemblyName fusionAssemblyName = null;
ComCheck(FusionApi.CreateAssemblyNameObject(out fusionAssemblyName, assemblyName.GetFullyQualifiedName(), CreateAssemblyNameObjectFlags.ParseDisplayName, IntPtr.Zero));
IInstallReferenceEnum installReferenceEnum = null;
ComCheck(FusionApi.CreateInstallReferenceEnum(out installReferenceEnum, fusionAssemblyName, 0, IntPtr.Zero));
IInstallReferenceItem item = null;
do
{
int hResult = installReferenceEnum.GetNextInstallReferenceItem(out item, 0, IntPtr.Zero);
if ((uint)hResult == 0x80070103) // ERROR_NO_MORE_ITEMS
{
yield break;
}
ComCheck(hResult);
IntPtr refData;
ComCheck(item.GetReference(out refData, 0, IntPtr.Zero));
FusionInstallReference fusionReference = new FusionInstallReference();
Marshal.PtrToStructure(refData, fusionReference);
var reference = new InstallReference(InstallReferenceGuid.ToType(fusionReference.GuidScheme), fusionReference.Identifier,
fusionReference.NonCanonicalData);
yield return reference;
} while (true);
}
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2122:DoNotIndirectlyExposeMethodsWithLinkDemands")]
public static String GetAssemblyPath(AssemblyName assemblyName)
{
if (assemblyName == null)
{
throw new ArgumentNullException("assemblyName");
}
if (!assemblyName.IsFullyQualified())
{
throw new ArgumentOutOfRangeException("assemblyName", assemblyName, "Must be a fully qualified assembly name");
}
var assemblyCache = GetAssemblyCache();
AssemblyInfo info = new AssemblyInfo();
info.cbAssemblyInfo = Marshal.SizeOf(typeof(AssemblyInfo));
info.cchBuf = 1024;
info.currentAssemblyPath = new String('\0', info.cchBuf);
int hResult = assemblyCache.QueryAssemblyInfo(QueryAssemblyInfoFlags.Default, assemblyName.GetFullyQualifiedName(), ref info);
if ((uint)hResult == 0x8007007A) // ERROR_INSUFFICIENT_BUFFER
{
info.currentAssemblyPath = new String('\0', info.cchBuf);
ComCheck(assemblyCache.QueryAssemblyInfo(QueryAssemblyInfoFlags.Default, assemblyName.GetFullyQualifiedName(), ref info));
}
else
{
ComCheck(hResult);
}
return info.currentAssemblyPath;
}
public static string GetFullyQualifiedAssemblyName(AssemblyName assemblyName)
{
return assemblyName.GetFullyQualifiedName();
}
public static bool IsFullyQualifiedAssemblyName(AssemblyName assemblyName)
{
return assemblyName.IsFullyQualified();
}
private static String GetDisplayName(IAssemblyName assemblyName)
{
int bufferSize = 1024;
StringBuilder buffer = new StringBuilder(bufferSize);
int hResult = assemblyName.GetDisplayName(buffer, ref bufferSize, AssemblyNameDisplayFlags.Full);
if ((uint)hResult == 0x8007007A) // ERROR_INSUFFICIENT_BUFFER
{
buffer = new StringBuilder(bufferSize);
ComCheck(assemblyName.GetDisplayName(buffer, ref bufferSize, AssemblyNameDisplayFlags.Full));
}
else
{
ComCheck(hResult);
}
return buffer.ToString();
}
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Security", "CA2122:DoNotIndirectlyExposeMethodsWithLinkDemands")]
private static int ComCheck(int hResult)
{
if (hResult != 0) // S_OK
{
Marshal.ThrowExceptionForHR(hResult);
}
return hResult;
}
private static IAssemblyCache GetAssemblyCache()
{
IAssemblyCache assemblyCache = null;
ComCheck(FusionApi.CreateAssemblyCache(out assemblyCache, 0));
return assemblyCache;
}
}
}