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Utility to timestamp Authenticode signatures of PowerShell or VBScript files
1 parent aa02b57 commit de4809c

13 files changed

+817
-0
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‎.gitignore‎

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bin/
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obj/
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.vs/

‎App.config‎

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<?xml version="1.0" encoding="utf-8" ?>
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<configuration>
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<startup>
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<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
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</startup>
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</configuration>

‎IAuthenticodeSignatureTraits.cs‎

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namespace PowershellScriptTimestamp
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{
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internal interface IAuthenticodeSignatureTraits
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{
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/// <summary>
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/// Code point sequence that is found before every signature
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/// </summary>
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string SignatureBeginSequence { get; }
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/// <summary>
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/// Code point sequence that is found after every signature
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/// </summary>
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string SignatureEndSequence { get; }
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/// <summary>
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/// Code point sequence that is found at the beginning of each signature chunk
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/// </summary>
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string SignatureLineBeginning { get; }
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/// <summary>
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/// Code point sequence that is found at the end of each signature chunk, including the line terminator
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/// </summary>
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string SignatureLineEnding { get; }
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/// <summary>
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/// Number of base64 characters found on each signature chunk.
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/// </summary>
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int SignatureCharsPerLine { get; }
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}
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}

‎LICENSE‎ renamed to ‎LICENSE.txt‎

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‎PowershellScriptTimestamp.csproj‎

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<?xml version="1.0" encoding="utf-8"?>
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<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
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<PropertyGroup>
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<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
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<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
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<ProjectGuid>{DA9D348A-026B-4217-B507-8D6A11B73979}</ProjectGuid>
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<OutputType>Exe</OutputType>
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<RootNamespace>PowershellScriptTimestamp</RootNamespace>
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<AssemblyName>PowershellScriptTimestamp</AssemblyName>
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<TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>
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<FileAlignment>512</FileAlignment>
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<AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
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<Deterministic>true</Deterministic>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
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<PlatformTarget>AnyCPU</PlatformTarget>
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<DebugSymbols>true</DebugSymbols>
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<DebugType>full</DebugType>
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<Optimize>false</Optimize>
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<OutputPath>bin\Debug\</OutputPath>
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<DefineConstants>DEBUG;TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
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<PlatformTarget>AnyCPU</PlatformTarget>
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<DebugType>pdbonly</DebugType>
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<Optimize>true</Optimize>
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<OutputPath>bin\Release\</OutputPath>
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<DefineConstants>TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<ItemGroup>
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<Reference Include="System" />
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<Reference Include="System.Core" />
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<Reference Include="System.Xml.Linq" />
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<Reference Include="System.Data.DataSetExtensions" />
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<Reference Include="Microsoft.CSharp" />
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<Reference Include="System.Data" />
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<Reference Include="System.Net.Http" />
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<Reference Include="System.Xml" />
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</ItemGroup>
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<ItemGroup>
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<Compile Include="IAuthenticodeSignatureTraits.cs" />
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<Compile Include="PowershellSignatureTraits.cs" />
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<Compile Include="ProcessExecutionResult.cs" />
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<Compile Include="Program.cs" />
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<Compile Include="Properties\AssemblyInfo.cs" />
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<Compile Include="TextFileTimestamp.cs" />
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<Compile Include="VbscriptSignatureTraits.cs" />
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</ItemGroup>
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<ItemGroup>
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<None Include="App.config" />
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</ItemGroup>
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<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
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</Project>

‎PowershellScriptTimestamp.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 17
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VisualStudioVersion = 17.6.33829.357
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PowershellScriptTimestamp", "PowershellScriptTimestamp.csproj", "{DA9D348A-026B-4217-B507-8D6A11B73979}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{DA9D348A-026B-4217-B507-8D6A11B73979}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{DA9D348A-026B-4217-B507-8D6A11B73979}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{DA9D348A-026B-4217-B507-8D6A11B73979}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{DA9D348A-026B-4217-B507-8D6A11B73979}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {CA8E06A2-FA4E-4CAC-9DC2-79FCE76F2931}
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EndGlobalSection
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EndGlobal

‎PowershellSignatureTraits.cs‎

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namespace PowershellScriptTimestamp
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{
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internal class PowershellSignatureTraits : IAuthenticodeSignatureTraits
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{
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/// <summary>
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/// Code point sequence that is found before every signature
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/// </summary>
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string IAuthenticodeSignatureTraits.SignatureBeginSequence => "\r\n# SIG # Begin signature block\r\n";
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/// <summary>
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/// Code point sequence that is found after every signature
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/// </summary>
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string IAuthenticodeSignatureTraits.SignatureEndSequence => "\r\n# SIG # End signature block\r\n";
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/// <summary>
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/// Code point sequence that is found at the beginning of each signature chunk
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/// </summary>
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string IAuthenticodeSignatureTraits.SignatureLineBeginning => "# ";
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/// <summary>
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/// Code point sequence that is found at the end of each signature chunk, including the line terminator
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/// </summary>
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string IAuthenticodeSignatureTraits.SignatureLineEnding => "\r\n";
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/// <summary>
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/// Number of base64 characters found on each signature chunk.
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/// </summary>
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int IAuthenticodeSignatureTraits.SignatureCharsPerLine => 64;
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}
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}

‎ProcessExecutionResult.cs‎

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using System;
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using System.Diagnostics;
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using System.Text;
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using System.Threading;
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namespace PowershellScriptTimestamp
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{
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internal class ProcessExecutionResult
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{
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public string ExecutablePath { get; }
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public string CommandLineArguments { get; }
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public bool Successful { get; }
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public int ExitCode { get; }
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public string Stdout { get; }
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public string Stderr { get; }
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public ProcessExecutionResult(string path, string arguments)
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{
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ExecutablePath = path;
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CommandLineArguments = arguments;
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var outStringBuilder = new StringBuilder();
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var errStringBuilder = new StringBuilder();
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using (var process = new Process())
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try
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{
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process.StartInfo.CreateNoWindow = true;
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process.StartInfo.Arguments = arguments;
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process.StartInfo.FileName = path;
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process.StartInfo.RedirectStandardError = true;
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process.StartInfo.RedirectStandardOutput = true;
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process.StartInfo.UseShellExecute = false;
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using (AutoResetEvent stdoutConsumed = new AutoResetEvent(false))
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using (AutoResetEvent stderrConsumed = new AutoResetEvent(false))
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{
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process.OutputDataReceived += (sender, evtArgs) =>
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{
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if (evtArgs.Data == null)
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{
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stdoutConsumed.Set();
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}
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else
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{
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outStringBuilder.AppendLine(evtArgs.Data);
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}
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};
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process.ErrorDataReceived += (sender, evtArgs) =>
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{
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if (evtArgs.Data == null)
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{
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stderrConsumed.Set();
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}
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else
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{
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errStringBuilder.AppendLine(evtArgs.Data);
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}
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};
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Console.WriteLine($"[INFO] About to run process {path} with arguments {arguments}.");
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if (!process.Start())
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{
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Console.WriteLine($"[ERROR] Could not start process.");
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return;
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}
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try
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{
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process.BeginOutputReadLine();
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process.BeginErrorReadLine();
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process.WaitForExit();
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stdoutConsumed.WaitOne();
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stderrConsumed.WaitOne();
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}
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catch (Exception ex)
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{
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Console.WriteLine($"[ERROR] Could not wait for end of process. Dumping exception.");
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Console.WriteLine(ex);
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return;
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}
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}
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ExitCode = process.ExitCode;
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Successful = true;
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return;
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}
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catch (Exception ex)
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{
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Console.WriteLine($"[ERROR] Could not run process. Dumping exception.");
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Console.WriteLine(ex);
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}
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finally
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{
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Stdout = outStringBuilder.ToString();
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Stderr = errStringBuilder.ToString();
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}
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}
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}
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}

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