PE cataloger should consider compile target paths from deps.json (#3821)

* fix PE compile path processing

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* fix tests

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

* adjust fixture comment

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

---------

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

syft/pkg/cataloger/dotnet/cataloger_test.go

@@ -1008,6 +1008,7 @@ func TestCataloger(t *testing.T) {
 				"Serilog.Sinks.Console @ 4.0.1 (/app/helloworld.deps.json)",
 				"helloworld @ 1.0.0 (/app/helloworld.deps.json)",
 				"runtime.linux-x64.Microsoft.NETCore.App @ 2.2.8 (/usr/share/dotnet/shared/Microsoft.NETCore.App/2.2.8/Microsoft.NETCore.App.deps.json)",
+				"runtime.linux-x64.Microsoft.NETCore.DotNetHostPolicy @ 2.2.8 (/usr/share/dotnet/shared/Microsoft.NETCore.App/2.2.8/Microsoft.NETCore.App.deps.json)", // a compile target reference
 			},
 			expectedRels: []string{
 				"Serilog @ 2.10.0 (/app/helloworld.deps.json) [dependency-of] Serilog.Sinks.Console @ 4.0.1 (/app/helloworld.deps.json)",
@@ -1035,7 +1036,7 @@ func TestCataloger(t *testing.T) {
 	}
 }
 
-func TestDotnetDepsCataloger_problemCases(t *testing.T) {
+func TestDotnetDepsCataloger_regressions(t *testing.T) {
 	cases := []struct {
 		name      string
 		fixture   string
@@ -1072,6 +1073,20 @@ func TestDotnetDepsCataloger_problemCases(t *testing.T) {
 				pkgtest.AssertPackagesEqualIgnoreLayers(t, expected, actual)
 			},
 		},
+		{
+			name:      "compile target reference",
+			fixture:   "image-net8-compile-target",
+			cataloger: NewDotnetDepsBinaryCataloger(DefaultCatalogerConfig()),
+			assertion: func(t *testing.T, pkgs []pkg.Package, relationships []artifact.Relationship) {
+				// ensure we find the DotNetNuke.Core package (which is using the compile target reference)
+				for _, p := range pkgs {
+					if p.Name == "DotNetNuke.Core" {
+						return
+					}
+				}
+				t.Error("expected to find DotNetNuke.Core package")
+			},
+		},
 	}
 	for _, tt := range cases {
 		t.Run(tt.name, func(t *testing.T) {

syft/pkg/cataloger/dotnet/deps_binary_cataloger.go

@@ -204,6 +204,14 @@ func attachAssociatedExecutables(dep *logicalDepsJSON, pe logicalPE) bool {
 			continue
 		}
 
+		if targetPath, ok := p.CompilePathsByRelativeDLLPath[relativeDllPath]; ok {
+			pe.TargetPath = targetPath
+			p.Executables = append(p.Executables, pe)
+			dep.PackagesByNameVersion[key] = p // update the map with the modified package
+			found = true
+			continue
+		}
+
 		if p.NativePaths.Has(relativeDllPath) {
 			pe.TargetPath = relativeDllPath
 			p.Executables = append(p.Executables, pe)
@@ -265,7 +273,7 @@ func packagesFromLogicalDepsJSON(doc logicalDepsJSON, config CatalogerConfig) (*
 			continue
 		}
 
-		claimsDLLs := len(lp.RuntimePathsByRelativeDLLPath) > 0 || len(lp.ResourcePathsByRelativeDLLPath) > 0
+		claimsDLLs := len(lp.RuntimePathsByRelativeDLLPath) > 0 || len(lp.ResourcePathsByRelativeDLLPath) > 0 || len(lp.CompilePathsByRelativeDLLPath) > 0 || len(lp.NativePaths.List()) > 0
 
 		if config.DepPackagesMustClaimDLL && !claimsDLLs {
 			if config.RelaxDLLClaimsWhenBundlingDetected && !doc.BundlingDetected || !config.RelaxDLLClaimsWhenBundlingDetected {

syft/pkg/cataloger/dotnet/deps_json.go

@@ -26,9 +26,50 @@ type depsTarget struct {
 	Dependencies map[string]string            `json:"dependencies"`
 	Runtime      map[string]map[string]string `json:"runtime"`
 	Resources    map[string]map[string]string `json:"resources"`
+	Compile      map[string]map[string]string `json:"compile"`
 	Native       map[string]map[string]string `json:"native"`
 }
 
+func (t depsTarget) nativePaths() *strset.Set {
+	results := strset.New()
+	for path := range t.Native {
+		results.Add(path)
+	}
+	return results
+}
+
+func (t depsTarget) compilePaths() map[string]string {
+	result := make(map[string]string)
+	for path := range t.Compile {
+		trimmedPath := trimLibPrefix(path)
+		if _, exists := result[trimmedPath]; exists {
+			continue
+		}
+		result[trimmedPath] = path
+	}
+	return result
+}
+
+func (t depsTarget) resourcePaths() map[string]string {
+	result := make(map[string]string)
+	for path := range t.Resources {
+		trimmedPath := trimLibPrefix(path)
+		if _, exists := result[trimmedPath]; exists {
+			continue
+		}
+		result[trimmedPath] = path
+	}
+	return result
+}
+
+func (t depsTarget) runtimePaths() map[string]string {
+	result := make(map[string]string)
+	for path := range t.Runtime {
+		result[trimLibPrefix(path)] = path
+	}
+	return result
+}
+
 type depsLibrary struct {
 	Type     string `json:"type"`
 	Path     string `json:"path"`
@@ -51,6 +92,10 @@ type logicalDepsJSONPackage struct {
 	// to the target path as described in the deps.json target entry under "resource".
 	ResourcePathsByRelativeDLLPath map[string]string
 
+	// CompilePathsByRelativeDLLPath is a map of the relative path to the DLL relative to the deps.json file
+	// to the target path as described in the deps.json target entry under "compile".
+	CompilePathsByRelativeDLLPath map[string]string
+
 	// NativePathsByRelativeDLLPath is a map of the relative path to the DLL relative to the deps.json file
 	// to the target path as described in the deps.json target entry under "native". These should not have
 	// any runtime references to trim from the front of the path.
@@ -133,31 +178,15 @@ func getLogicalDepsJSON(deps depsJSON) logicalDepsJSON {
 			if ok {
 				lib = &l
 			}
-			runtimePaths := make(map[string]string)
-			for path := range target.Runtime {
-				runtimePaths[trimLibPrefix(path)] = path
-			}
-			resourcePaths := make(map[string]string)
-			for path := range target.Resources {
-				trimmedPath := trimLibPrefix(path)
-				if _, exists := resourcePaths[trimmedPath]; exists {
-					continue
-				}
-				resourcePaths[trimmedPath] = path
-			}
-
-			nativePaths := strset.New()
-			for path := range target.Native {
-				nativePaths.Add(path)
-			}
 
 			p := &logicalDepsJSONPackage{
 				NameVersion:                    libName,
 				Library:                        lib,
 				Targets:                        &target,
-				RuntimePathsByRelativeDLLPath:  runtimePaths,
-				ResourcePathsByRelativeDLLPath: resourcePaths,
-				NativePaths:                    nativePaths,
+				RuntimePathsByRelativeDLLPath:  target.runtimePaths(),
+				ResourcePathsByRelativeDLLPath: target.resourcePaths(),
+				CompilePathsByRelativeDLLPath:  target.compilePaths(),
+				NativePaths:                    target.nativePaths(),
 			}
 			packageMap[libName] = p
 			nameVersions.Add(libName)

syft/pkg/cataloger/dotnet/test-fixtures/image-net8-compile-target/.gitignore

@@ -0,0 +1,2 @@
+/app
+/extract.sh

syft/pkg/cataloger/dotnet/test-fixtures/image-net8-compile-target/Dockerfile

@@ -0,0 +1,18 @@
+FROM mcr.microsoft.com/dotnet/sdk:8.0-alpine@sha256:3f93439f47fea888d94e6e228d0d0de841f4122ef46f8bfd04f8bd78cbce7ddb AS build
+ARG RUNTIME=win-x64
+WORKDIR /src
+
+COPY src/helloworld.csproj .
+RUN dotnet restore -r $RUNTIME
+
+COPY src/*.cs .
+
+RUN dotnet publish -c Release --no-restore -o /app
+
+# note: we're not using a runtime here to make testing easier... so you cannot run this container and expect it to work
+# we do this to keep the test assertions small since the don't want to include the several other runtime packages
+FROM busybox:latest
+
+WORKDIR /app
+
+COPY --from=build /app .

syft/pkg/cataloger/dotnet/test-fixtures/image-net8-compile-target/src/Program.cs

@@ -0,0 +1,12 @@
+using System;
+
+namespace HelloWorld
+{
+    public class Program
+    {
+        public static void Main(string[] args)
+        {
+                Console.WriteLine("Hello World!");
+        }
+    }
+}

syft/pkg/cataloger/dotnet/test-fixtures/image-net8-compile-target/src/helloworld.csproj

@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk" ToolsVersion="15.0">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="DotNetNuke.Core" Version="9.9.1"/>
+    <PackageReference Include="jQuery" Version="3.4.1" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Razor" Version="2.2.0" />
+    <PackageReference Include="Microsoft.ChakraCore" Version="1.11.24">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="Nuget.CommandLine" Version="6.3.1">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+    <PackageReference Include="Umbraco.Cms" Version="11.3.0" />
+  </ItemGroup>
+
+</Project>