File size: 2,490 Bytes
8c763fb | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | // Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
using System;
using System.Management.Automation;
using System.Management.Automation.Internal;
using System.Management.Automation.Security;
namespace Microsoft.PowerShell.Commands
{
/// <summary>
/// Class implementing Invoke-Expression.
/// </summary>
[Cmdlet(VerbsLifecycle.Invoke, "Expression", HelpUri = "https://go.microsoft.com/fwlink/?LinkID=2097030")]
public sealed
class
InvokeExpressionCommand : PSCmdlet
{
#region parameters
/// <summary>
/// Command to execute.
/// </summary>
[Parameter(Position = 0, Mandatory = true, ValueFromPipeline = true)]
[ValidateTrustedData]
public string Command { get; set; }
#endregion parameters
/// <summary>
/// For each record, execute it, and push the results into the success stream.
/// </summary>
protected override void ProcessRecord()
{
Diagnostics.Assert(Command != null, "Command is null");
ScriptBlock myScriptBlock = InvokeCommand.NewScriptBlock(Command);
// If the runspace has ever been in ConstrainedLanguage, lock down this
// invocation as well - it is too easy for the command to be negatively influenced
// by malicious input (such as ReadOnly + Constant variables)
if (Context.HasRunspaceEverUsedConstrainedLanguageMode)
{
myScriptBlock.LanguageMode = PSLanguageMode.ConstrainedLanguage;
}
if (SystemPolicy.GetSystemLockdownPolicy() == SystemEnforcementMode.Audit)
{
SystemPolicy.LogWDACAuditMessage(
context: Context,
title: UtilityCommonStrings.IEXWDACLogTitle,
message: UtilityCommonStrings.IEXWDACLogMessage,
fqid: "InvokeExpressionCmdletConstrained",
dropIntoDebugger: true);
}
var emptyArray = Array.Empty<object>();
myScriptBlock.InvokeUsingCmdlet(
contextCmdlet: this,
useLocalScope: false,
errorHandlingBehavior: ScriptBlock.ErrorHandlingBehavior.WriteToCurrentErrorPipe,
dollarUnder: AutomationNull.Value,
input: emptyArray,
scriptThis: AutomationNull.Value,
args: emptyArray);
}
}
}
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