internal static SECURITY_ATTRIBUTES GetSecurityAttributes(GCHandle securityDescriptorPinnedHandle, bool inheritHandle = false)
{
SECURITY_ATTRIBUTES securityAttributes = new NamedPipeNative.SECURITY_ATTRIBUTES();
securityAttributes.InheritHandle = inheritHandle;
securityAttributes.NLength = (int)Marshal.SizeOf(securityAttributes);
securityAttributes.LPSecurityDescriptor = securityDescriptorPinnedHandle.AddrOfPinnedObject();
return(securityAttributes);
}
/// <summary>
/// Helper method to create a PowerShell transport named pipe via native API, along
/// with a returned .Net NamedPipeServerStream object wrapping the named pipe.
/// </summary>
/// <param name="serverName">Named pipe server name.</param>
/// <param name="namespaceName">Named pipe namespace name.</param>
/// <param name="coreName">Named pipe core name.</param>
/// <param name="securityDesc"></param>
/// <returns>NamedPipeServerStream</returns>
private NamedPipeServerStream CreateNamedPipe(
string serverName,
string namespaceName,
string coreName,
CommonSecurityDescriptor securityDesc)
{
if (serverName == null)
{
throw new PSArgumentNullException("serverName");
}
if (namespaceName == null)
{
throw new PSArgumentNullException("namespaceName");
}
if (coreName == null)
{
throw new PSArgumentNullException("coreName");
}
string fullPipeName = @"\\" + serverName + @"\" + namespaceName + @"\" + coreName;
// Create optional security attributes based on provided PipeSecurity.
NamedPipeNative.SECURITY_ATTRIBUTES securityAttributes = null;
GCHandle?securityDescHandle = null;
if (securityDesc != null)
{
byte[] securityDescBuffer = new byte[securityDesc.BinaryLength];
securityDesc.GetBinaryForm(securityDescBuffer, 0);
securityDescHandle = GCHandle.Alloc(securityDescBuffer, GCHandleType.Pinned);
securityAttributes = NamedPipeNative.GetSecurityAttributes(securityDescHandle.Value);
}
// Create named pipe.
SafePipeHandle pipeHandle = NamedPipeNative.CreateNamedPipe(
fullPipeName,
NamedPipeNative.PIPE_ACCESS_DUPLEX | NamedPipeNative.FILE_FLAG_FIRST_PIPE_INSTANCE | NamedPipeNative.FILE_FLAG_OVERLAPPED,
NamedPipeNative.PIPE_TYPE_MESSAGE | NamedPipeNative.PIPE_READMODE_MESSAGE,
1,
_namedPipeBufferSizeForRemoting,
_namedPipeBufferSizeForRemoting,
0,
securityAttributes);
int lastError = Marshal.GetLastWin32Error();
if (securityDescHandle != null)
{
securityDescHandle.Value.Free();
}
if (pipeHandle.IsInvalid)
{
throw new PSInvalidOperationException(
StringUtil.Format(RemotingErrorIdStrings.CannotCreateNamedPipe, lastError));
}
// Create the .Net NamedPipeServerStream wrapper.
try
{
return(new NamedPipeServerStream(
PipeDirection.InOut,
true, // IsAsync
false, // IsConnected
pipeHandle));
}
catch (Exception e)
{
CommandProcessorBase.CheckForSevereException(e);
pipeHandle.Dispose();
throw;
}
}
/// <summary>
/// Helper method to create a PowerShell transport named pipe via native API, along
/// with a returned .Net NamedPipeServerStream object wrapping the named pipe.
/// </summary>
/// <param name="serverName">Named pipe server name.</param>
/// <param name="namespaceName">Named pipe namespace name.</param>
/// <param name="coreName">Named pipe core name.</param>
/// <param name="securityDesc"></param>
/// <returns>NamedPipeServerStream.</returns>
private static NamedPipeServerStream CreateNamedPipe(
string serverName,
string namespaceName,
string coreName,
CommonSecurityDescriptor securityDesc)
{
if (serverName == null)
{
throw new PSArgumentNullException(nameof(serverName));
}
if (namespaceName == null)
{
throw new PSArgumentNullException(nameof(namespaceName));
}
if (coreName == null)
{
throw new PSArgumentNullException(nameof(coreName));
}
#if !UNIX
string fullPipeName = @"\\" + serverName + @"\" + namespaceName + @"\" + coreName;
// Create optional security attributes based on provided PipeSecurity.
NamedPipeNative.SECURITY_ATTRIBUTES securityAttributes = null;
GCHandle?securityDescHandle = null;
if (securityDesc != null)
{
byte[] securityDescBuffer = new byte[securityDesc.BinaryLength];
securityDesc.GetBinaryForm(securityDescBuffer, 0);
securityDescHandle = GCHandle.Alloc(securityDescBuffer, GCHandleType.Pinned);
securityAttributes = NamedPipeNative.GetSecurityAttributes(securityDescHandle.Value);
}
// Create named pipe.
SafePipeHandle pipeHandle = NamedPipeNative.CreateNamedPipe(
fullPipeName,
NamedPipeNative.PIPE_ACCESS_DUPLEX | NamedPipeNative.FILE_FLAG_FIRST_PIPE_INSTANCE | NamedPipeNative.FILE_FLAG_OVERLAPPED,
NamedPipeNative.PIPE_TYPE_MESSAGE | NamedPipeNative.PIPE_READMODE_MESSAGE,
1,
_namedPipeBufferSizeForRemoting,
_namedPipeBufferSizeForRemoting,
0,
securityAttributes);
int lastError = Marshal.GetLastWin32Error();
if (securityDescHandle != null)
{
securityDescHandle.Value.Free();
}
if (pipeHandle.IsInvalid)
{
throw new PSInvalidOperationException(
StringUtil.Format(RemotingErrorIdStrings.CannotCreateNamedPipe, lastError));
}
// Create the .Net NamedPipeServerStream wrapper.
try
{
return(new NamedPipeServerStream(
PipeDirection.InOut,
true, // IsAsync
false, // IsConnected
pipeHandle));
}
catch (Exception)
{
pipeHandle.Dispose();
throw;
}
#else
return(new NamedPipeServerStream(
pipeName: coreName,
direction: PipeDirection.InOut,
maxNumberOfServerInstances: 1,
transmissionMode: PipeTransmissionMode.Byte,
options: PipeOptions.Asynchronous | PipeOptions.CurrentUserOnly,
inBufferSize: _namedPipeBufferSizeForRemoting,
outBufferSize: _namedPipeBufferSizeForRemoting));
#endif
}
internal static SECURITY_ATTRIBUTES GetSecurityAttributes(GCHandle securityDescriptorPinnedHandle, bool inheritHandle = false)
{
SECURITY_ATTRIBUTES securityAttributes = new NamedPipeNative.SECURITY_ATTRIBUTES();
securityAttributes.InheritHandle = inheritHandle;
securityAttributes.NLength = (int)Marshal.SizeOf(securityAttributes);
securityAttributes.LPSecurityDescriptor = securityDescriptorPinnedHandle.AddrOfPinnedObject();
return securityAttributes;
}