Add support for strong-name keys in WholeProjectDecompiler and RoundtripAssembly tests.

ICSharpCode.Decompiler.Tests/Helpers/Tester.cs

@@ -534,5 +534,27 @@ namespace ICSharpCode.Decompiler.Tests.Helpers
 			// If the last try still fails, don't catch the exception
 			action();
 		}
+
+		public static void SignAssembly(string assemblyPath, string keyFilePath)
+		{
+			string snPath = SdkUtility.GetSdkPath("sn.exe");
+
+			ProcessStartInfo info = new ProcessStartInfo(snPath);
+			info.Arguments = $"-R \"{assemblyPath}\" \"{keyFilePath}\"";
+			info.RedirectStandardError = true;
+			info.RedirectStandardOutput = true;
+			info.UseShellExecute = false;
+
+			Process process = Process.Start(info);
+
+			var outputTask = process.StandardOutput.ReadToEndAsync();
+			var errorTask = process.StandardError.ReadToEndAsync();
+
+			Task.WaitAll(outputTask, errorTask);
+			process.WaitForExit();
+
+			Console.WriteLine("output: " + outputTask.Result);
+			Console.WriteLine("errors: " + errorTask.Result);
+		}
 	}
 }

ICSharpCode.Decompiler.Tests/RoundtripAssembly.cs

@@ -102,11 +102,11 @@ namespace ICSharpCode.Decompiler.Tests
 			RunWithOutput("Random Tests\\TestCases", "TestCase-1.exe");
 		}
 
-		void RunWithTest(string dir, string fileToRoundtrip, string fileToTest)
+		void RunWithTest(string dir, string fileToRoundtrip, string fileToTest, string keyFile = null)
 		{
-			RunInternal(dir, fileToRoundtrip, outputDir => RunTest(outputDir, fileToTest));
+			RunInternal(dir, fileToRoundtrip, outputDir => RunTest(outputDir, fileToTest), keyFile);
 		}
-		
+
 		void RunWithOutput(string dir, string fileToRoundtrip)
 		{
 			string inputDir = Path.Combine(TestDir, dir);
@@ -114,7 +114,7 @@ namespace ICSharpCode.Decompiler.Tests
 				outputDir => Tester.RunAndCompareOutput(fileToRoundtrip, Path.Combine(inputDir, fileToRoundtrip), Path.Combine(outputDir, fileToRoundtrip)));
 		}
 		
-		void RunInternal(string dir, string fileToRoundtrip, Action<string> testAction)
+		void RunInternal(string dir, string fileToRoundtrip, Action<string> testAction, string snkFilePath = null)
 		{
 			if (!Directory.Exists(TestDir)) {
 				Assert.Ignore($"Assembly-roundtrip test ignored: test directory '{TestDir}' needs to be checked out separately." + Environment.NewLine +
@@ -152,6 +152,9 @@ namespace ICSharpCode.Decompiler.Tests
 						decompiler.Settings = new DecompilerSettings(LanguageVersion.CSharp7_3);
 						// use a fixed GUID so that we can diff the output between different ILSpy runs without spurious changes
 						decompiler.ProjectGuid = Guid.Parse("{127C83E4-4587-4CF9-ADCA-799875F3DFE6}");
+						if (snkFilePath != null) {
+							decompiler.StrongNameKeyFile = Path.Combine(inputDir, snkFilePath);
+						}
 						decompiler.DecompileProject(module, decompiledDir);
 						Console.WriteLine($"Decompiled {fileToRoundtrip} in {w.Elapsed.TotalSeconds:f2}");
 						projectFile = Path.Combine(decompiledDir, module.Name + ".csproj");

ICSharpCode.Decompiler/CSharp/WholeProjectDecompiler.cs

@@ -79,6 +79,12 @@ namespace ICSharpCode.Decompiler.CSharp
 		/// </summary>
 		public Guid? ProjectGuid { get; set; }
 
+		/// <summary>
+		/// Path to the snk file to use for signing.
+		/// <c>null</c> to not sign.
+		/// </summary>
+		public string StrongNameKeyFile { get; set; }
+
 		public int MaxDegreeOfParallelism { get; set; } = Environment.ProcessorCount;
 		#endregion
 
@@ -111,6 +117,9 @@ namespace ICSharpCode.Decompiler.CSharp
 			directories.Clear();
 			var files = WriteCodeFilesInProject(moduleDefinition, cancellationToken).ToList();
 			files.AddRange(WriteResourceFilesInProject(moduleDefinition));
+			if (StrongNameKeyFile != null) {
+				File.Copy(StrongNameKeyFile, Path.Combine(targetDirectory, Path.GetFileName(StrongNameKeyFile)));
+			}
 			return WriteProjectFile(projectFileWriter, files, moduleDefinition);
 		}
 
@@ -215,6 +224,11 @@ namespace ICSharpCode.Decompiler.CSharp
 				}
 				w.WriteElementString("WarningLevel", "4");
 				w.WriteElementString("AllowUnsafeBlocks", "True");
+				
+				if (StrongNameKeyFile != null) {
+					w.WriteElementString("SignAssembly", "True");
+					w.WriteElementString("AssemblyOriginatorKeyFile", Path.GetFileName(StrongNameKeyFile));
+				}
 
 				w.WriteEndElement(); // </PropertyGroup>