added attempt to resolve system scoped dependency with test cases

dependency-check-core/src/main/java/org/owasp/dependencycheck/exception/DependencyNotFoundException.java

@@ -0,0 +1,66 @@
+/*
+ * This file is part of dependency-check-core.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Copyright (c) 2017 Jeremy Long. All Rights Reserved.
+ */
+package org.owasp.dependencycheck.exception;
+
+/**
+ * An exception used when a dependency could not be found.
+ *
+ * @author Jeremy Long
+ */
+public class DependencyNotFoundException extends Exception {
+
+    /**
+     * The serial version uid.
+     */
+    private static final long serialVersionUID = 1L;
+
+    /**
+     * Creates a new DependencyNotFoundException.
+     */
+    public DependencyNotFoundException() {
+        super();
+    }
+
+    /**
+     * Creates a new DependencyNotFoundException.
+     *
+     * @param msg a message for the exception.
+     */
+    public DependencyNotFoundException(String msg) {
+        super(msg);
+    }
+
+    /**
+     * Creates a new DependencyNotFoundException.
+     *
+     * @param ex the cause of the exception.
+     */
+    public DependencyNotFoundException(Throwable ex) {
+        super(ex);
+    }
+
+    /**
+     * Creates a new DependencyNotFoundException.
+     *
+     * @param msg a message for the exception.
+     * @param ex the cause of the exception.
+     */
+    public DependencyNotFoundException(String msg, Throwable ex) {
+        super(msg, ex);
+    }
+}

dependency-check-maven/src/it/729-system-scope-resolved/invoker.properties

@@ -0,0 +1,19 @@
+#
+# This file is part of dependency-check-maven.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# Copyright (c) 2017 Jeremy Long. All Rights Reserved.
+#
+
+invoker.goals = install ${project.groupId}:${project.artifactId}:${project.version}:check -e -Dformat=JSON

dependency-check-maven/src/it/729-system-scope-resolved/postbuild.groovy

@@ -0,0 +1,30 @@
+/*
+ * This file is part of dependency-check-maven.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Copyright (c) 2017 Jeremy Long. All Rights Reserved.
+ */
+
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.lang.StringUtils;
+import java.nio.charset.Charset;
+import groovy.json.JsonSlurper;
+
+def slurper = new JsonSlurper()
+def json = slurper.parse(new File(basedir, "target/dependency-check-report.json"), "UTF-8")
+
+assert json instanceof Map
+assert json.analysis.dependencies instanceof List
+assert json.analysis.dependencies.size()==1
+return true;

dependency-check-maven/src/it/729-system-scope-resolved/prebuild.groovy

@@ -0,0 +1,17 @@
+/*
+ * This file is part of dependency-check-maven.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Copyright (c) 2017 Jeremy Long. All Rights Reserved.
+ */

dependency-check-maven/src/it/729-system-scope-skipped/pom.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+This file is part of dependency-check-maven.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+Copyright (c) 2017 Jeremy Long. All Rights Reserved.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>org.owasp.test</groupId>
+    <artifactId>test-system-scope</artifactId>
+    <version>1.0.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+	<dependencies>
+    <dependency>
+        <scope>system</scope>
+        <groupId>com.sun</groupId>
+        <artifactId>tools</artifactId>
+        <version>1.8</version>
+        <systemPath>${java.home}/../lib/tools.jar</systemPath>
+    </dependency>
+	</dependencies>
+</project>

dependency-check-maven/src/main/java/org/owasp/dependencycheck/maven/BaseDependencyCheckMojo.java

@@ -55,6 +55,7 @@ import org.owasp.dependencycheck.dependency.Confidence;
 import org.owasp.dependencycheck.dependency.Dependency;
 import org.owasp.dependencycheck.dependency.Identifier;
 import org.owasp.dependencycheck.dependency.Vulnerability;
+import org.owasp.dependencycheck.exception.DependencyNotFoundException;
 import org.owasp.dependencycheck.exception.ExceptionCollection;
 import org.owasp.dependencycheck.exception.ReportException;
 import org.owasp.dependencycheck.reporting.ReportGenerator;
@@ -643,16 +644,45 @@ public abstract class BaseDependencyCheckMojo extends AbstractMojo implements Ma
             }
             exCol = collectDependencies(engine, project, dependencyNode.getChildren(), buildingRequest);
             try {
-                final ArtifactCoordinate coordinate = TransferUtils.toArtifactCoordinate(dependencyNode.getArtifact());
-                final Artifact result = artifactResolver.resolveArtifact(buildingRequest, coordinate).getArtifact();
-                if (result.isResolved() && result.getFile() != null) {
-                    final List<Dependency> deps = engine.scan(result.getFile().getAbsoluteFile(),
+                boolean isResolved = false;
+                File artifactFile = null;
+                String artifactId = null;
+                String groupId = null;
+                String version = null;
+                if (org.apache.maven.artifact.Artifact.SCOPE_SYSTEM.equals(dependencyNode.getArtifact().getScope())) {
+                    for (org.apache.maven.model.Dependency d : project.getDependencies()) {
+                        Artifact a = dependencyNode.getArtifact();
+                        if (d.getSystemPath() != null && artifactsMatch(d, a)) {
+
+                            artifactFile = new File(d.getSystemPath());
+                            isResolved = artifactFile.isFile();
+                            groupId = a.getGroupId();
+                            artifactId = a.getArtifactId();
+                            version = a.getVersion();
+                            break;
+                        }
+                    }
+                    if (!isResolved) {
+                        getLog().error("Unable to resolve system scoped dependency: " + dependencyNode.toNodeString());
+                        exCol.addException(new DependencyNotFoundException("Unable to resolve system scoped dependency: " + dependencyNode.toNodeString()));
+                    }
+                } else {
+                    final ArtifactCoordinate coordinate = TransferUtils.toArtifactCoordinate(dependencyNode.getArtifact());
+                    final Artifact result = artifactResolver.resolveArtifact(buildingRequest, coordinate).getArtifact();
+                    isResolved = result.isResolved();
+                    artifactFile = result.getFile();
+                    groupId = result.getGroupId();
+                    artifactId = result.getArtifactId();
+                    version = result.getVersion();
+                }
+                if (isResolved && artifactFile != null) {
+                    final List<Dependency> deps = engine.scan(artifactFile.getAbsoluteFile(),
                             project.getName() + ":" + dependencyNode.getArtifact().getScope());
                     if (deps != null) {
                         if (deps.size() == 1) {
                             final Dependency d = deps.get(0);
                             if (d != null) {
-                                final MavenArtifact ma = new MavenArtifact(result.getGroupId(), result.getArtifactId(), result.getVersion());
+                                final MavenArtifact ma = new MavenArtifact(groupId, artifactId, version);
                                 d.addAsEvidence("pom", ma, Confidence.HIGHEST);
                                 if (getLog().isDebugEnabled()) {
                                     getLog().debug(String.format("Adding project reference %s on dependency %s",
@@ -690,6 +720,33 @@ public abstract class BaseDependencyCheckMojo extends AbstractMojo implements Ma
         return exCol;
     }
 
+    /**
+     * Determines if the groupId, artifactId, and version of the Maven
+     * dependency and artifact match.
+     *
+     * @param d the Maven dependency
+     * @param a the Maven artifact
+     * @return true if the groupId, artifactId, and version match
+     */
+    private static boolean artifactsMatch(org.apache.maven.model.Dependency d, Artifact a) {
+        return (isEqualOrNull(a.getArtifactId(), d.getArtifactId()))
+                && (isEqualOrNull(a.getGroupId(), d.getGroupId()))
+                && (isEqualOrNull(a.getVersion(), d.getVersion()));
+    }
+
+    /**
+     * Compares two strings for equality; if both strings are null they are
+     * considered equal.
+     *
+     * @param left the first string to compare
+     * @param right the second string to compare
+     * @return true if the strings are equal or if they are both null; otherwise
+     * false.
+     */
+    private static boolean isEqualOrNull(String left, String right) {
+        return (left != null && left.equals(right)) || (left == null && right == null);
+    }
+
     /**
      * @return Returns a new ProjectBuildingRequest populated from the current
      * session and the current project remote repositories, used to resolve