/*

  * 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) 2014 Jeremy Long. All Rights Reserved.

  */

 package org.owasp.dependencycheck.maven;

 import java.io.BufferedOutputStream;

 import java.io.File;

 import java.io.FileInputStream;

 import java.io.FileNotFoundException;

 import java.io.FileOutputStream;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.ObjectInputStream;

 import java.io.ObjectOutputStream;

 import java.io.OutputStream;

 import java.util.List;

 import java.util.Locale;

 import org.apache.maven.artifact.Artifact;

 import org.apache.maven.doxia.sink.Sink;

 import org.apache.maven.plugin.AbstractMojo;

 import org.apache.maven.plugin.MojoExecutionException;

 import org.apache.maven.plugin.MojoFailureException;

 import org.apache.maven.plugins.annotations.Parameter;

 import org.apache.maven.project.MavenProject;

 import org.apache.maven.reporting.MavenReport;

 import org.apache.maven.reporting.MavenReportException;

 import org.apache.maven.settings.Proxy;

 import org.owasp.dependencycheck.data.nexus.MavenArtifact;

 import org.owasp.dependencycheck.data.nvdcve.CveDB;

 import org.owasp.dependencycheck.data.nvdcve.DatabaseException;

 import org.owasp.dependencycheck.data.nvdcve.DatabaseProperties;

 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.reporting.ReportGenerator;

 import org.owasp.dependencycheck.utils.Settings;

 /**

  *

  * @author Jeremy Long

  */

 public abstract class BaseDependencyCheckMojo extends AbstractMojo implements MavenReport {

     //<editor-fold defaultstate="collapsed" desc="Private fields">

     /**

      * The properties file location.

      */

     private static final String PROPERTIES_FILE = "mojo.properties";

     /**

      * System specific new line character.

      */

     private static final String NEW_LINE = System.getProperty("line.separator", "\n").intern();

     /**

      * Sets whether or not the external report format should be used.

      */

     @Parameter(property = "metaFileName", defaultValue = "dependency-check.ser", required = true)

     private String dataFileName;

     //</editor-fold>

     // <editor-fold defaultstate="collapsed" desc="Maven bound parameters and components">

     /**

      * The Maven Project Object.

      */

     @Parameter(property = "project", required = true, readonly = true)

     private MavenProject project;

     /**

      * List of Maven project of the current build

      */

     @Parameter(readonly = true, required = true, property = "reactorProjects")

     private List<MavenProject> reactorProjects;

     /**

      * The output directory. This generally maps to "target".

      */

     @Parameter(defaultValue = "${project.build.directory}", required = true)

     private File outputDirectory;

     /**

      * Specifies the destination directory for the generated Dependency-Check report. This generally maps to "target/site".

      */

     @Parameter(property = "project.reporting.outputDirectory", required = true)

     private File reportOutputDirectory;

     /**

      * Specifies if the build should be failed if a CVSS score above a specified level is identified. The default is 11 which

      * means since the CVSS scores are 0-10, by default the build will never fail.

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "failBuildOnCVSS", defaultValue = "11", required = true)

     private float failBuildOnCVSS = 11;

     /**

      * Sets whether auto-updating of the NVD CVE/CPE data is enabled. It is not recommended that this be turned to false. Default

      * is true.

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "autoupdate", defaultValue = "true", required = true)

     private boolean autoUpdate = true;

     /**

      * Generate aggregate reports in multi-module projects.

      *

      * @deprecated use the aggregate goal instead

      */

     @Parameter(property = "aggregate", defaultValue = "false")

     @Deprecated

     private boolean aggregate;

     /**

      * The report format to be generated (HTML, XML, VULN, ALL). This configuration option has no affect if using this within the

      * Site plug-in unless the externalReport is set to true. Default is HTML.

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "format", defaultValue = "HTML", required = true)

     private String format = "HTML";

     /**

      * The Maven settings.

      */

     @Parameter(property = "mavenSettings", defaultValue = "${settings}", required = false)

     private org.apache.maven.settings.Settings mavenSettings;

     /**

      * The maven settings proxy id.

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "mavenSettingsProxyId", required = false)

     private String mavenSettingsProxyId;

     /**

      * The Connection Timeout.

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "connectionTimeout", defaultValue = "", required = false)

     private String connectionTimeout = null;

     /**

      * The path to the suppression file.

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "suppressionFile", defaultValue = "", required = false)

     private String suppressionFile = null;

     /**

      * Flag indicating whether or not to show a summary in the output.

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "showSummary", defaultValue = "true", required = false)

     private boolean showSummary = true;

     /**

      * Whether or not the Jar Analyzer is enabled.

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "jarAnalyzerEnabled", defaultValue = "true", required = false)

     private boolean jarAnalyzerEnabled = true;

     /**

      * Whether or not the Archive Analyzer is enabled.

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "archiveAnalyzerEnabled", defaultValue = "true", required = false)

     private boolean archiveAnalyzerEnabled = true;

     /**

      * Whether or not the .NET Assembly Analyzer is enabled.

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "assemblyAnalyzerEnabled", defaultValue = "true", required = false)

     private boolean assemblyAnalyzerEnabled = true;

     /**

      * Whether or not the .NET Nuspec Analyzer is enabled.

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "nuspecAnalyzerEnabled", defaultValue = "true", required = false)

     private boolean nuspecAnalyzerEnabled = true;

     /**

      * Whether or not the Central Analyzer is enabled.

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "centralAnalyzerEnabled", defaultValue = "true", required = false)

     private boolean centralAnalyzerEnabled = true;

     /**

      * Whether or not the Nexus Analyzer is enabled.

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "nexusAnalyzerEnabled", defaultValue = "true", required = false)

     private boolean nexusAnalyzerEnabled = true;

     /**

      * The URL of a Nexus server's REST API end point (http://domain/nexus/service/local).

      */

     @Parameter(property = "nexusUrl", defaultValue = "", required = false)

     private String nexusUrl;

     /**

      * Whether or not the configured proxy is used to connect to Nexus.

      */

     @Parameter(property = "nexusUsesProxy", defaultValue = "true", required = false)

     private boolean nexusUsesProxy = true;

     /**

      * The database connection string.

      */

     @Parameter(property = "connectionString", defaultValue = "", required = false)

     private String connectionString;

     /**

      * Returns the connection string.

      *

      * @return the connection string

      */

     protected String getConnectionString() {

         return connectionString;

     }

     /**

      * The database driver name. An example would be org.h2.Driver.

      */

     @Parameter(property = "databaseDriverName", defaultValue = "", required = false)

     private String databaseDriverName;

     /**

      * The path to the database driver if it is not on the class path.

      */

     @Parameter(property = "databaseDriverPath", defaultValue = "", required = false)

     private String databaseDriverPath;

     /**

      * The database user name.

      */

     @Parameter(property = "databaseUser", defaultValue = "", required = false)

     private String databaseUser;

     /**

      * The password to use when connecting to the database.

      */

     @Parameter(property = "databasePassword", defaultValue = "", required = false)

     private String databasePassword;

     /**

      * A comma-separated list of file extensions to add to analysis next to jar, zip, ....

      */

     @Parameter(property = "zipExtensions", required = false)

     private String zipExtensions;

     /**

      * Skip Analysis for Test Scope Dependencies.

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "skipTestScope", defaultValue = "true", required = false)

     private boolean skipTestScope = true;

     /**

      * Skip Analysis for Runtime Scope Dependencies.

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "skipRuntimeScope", defaultValue = "false", required = false)

     private boolean skipRuntimeScope = false;

     /**

      * Skip Analysis for Provided Scope Dependencies.

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "skipProvidedScope", defaultValue = "false", required = false)

     private boolean skipProvidedScope = false;

     /**

      * The data directory, hold DC SQL DB.

      */

     @Parameter(property = "dataDirectory", defaultValue = "", required = false)

     private String dataDirectory;

     /**

      * Data Mirror URL for CVE 1.2.

      */

     @Parameter(property = "cveUrl12Modified", defaultValue = "", required = false)

     private String cveUrl12Modified;

     /**

      * Data Mirror URL for CVE 2.0.

      */

     @Parameter(property = "cveUrl20Modified", defaultValue = "", required = false)

     private String cveUrl20Modified;

     /**

      * Base Data Mirror URL for CVE 1.2.

      */

     @Parameter(property = "cveUrl12Base", defaultValue = "", required = false)

     private String cveUrl12Base;

     /**

      * Data Mirror URL for CVE 2.0.

      */

     @Parameter(property = "cveUrl20Base", defaultValue = "", required = false)

     private String cveUrl20Base;

     /**

      * The path to mono for .NET Assembly analysis on non-windows systems.

      */

     @Parameter(property = "pathToMono", defaultValue = "", required = false)

     private String pathToMono;

     /**

      * The Proxy URL.

      *

      * @deprecated Please use mavenSettings instead

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "proxyUrl", defaultValue = "", required = false)

     @Deprecated

     private String proxyUrl = null;

     /**

      * Sets whether or not the external report format should be used.

      *

      * @deprecated the internal report is no longer supported

      */

     @SuppressWarnings("CanBeFinal")

     @Parameter(property = "externalReport")

     @Deprecated

     private String externalReport = null;

     // </editor-fold>

     //<editor-fold defaultstate="collapsed" desc="Base Maven implementation">

     /**

      * Executes dependency-check.

      *

      * @throws MojoExecutionException thrown if there is an exception executing the mojo

      * @throws MojoFailureException thrown if dependency-check failed the build

      */

     @Override

     public void execute() throws MojoExecutionException, MojoFailureException {

         validateAggregate();

         project.setContextValue(getOutputDirectoryContextKey(), this.outputDirectory);

         runCheck();

     }

     /**

      * Checks if the aggregate configuration parameter has been set to true. If it has a MojoExecutionException is thrown because

      * the aggregate configuration parameter is no longer supported.

      *

      * @throws MojoExecutionException thrown if aggregate is set to true

      */

     private void validateAggregate() throws MojoExecutionException {

         if (aggregate) {

             final String msg = "Aggregate configuration detected - as of dependency-check 1.2.8 this no longer supported. "

                     + "Please use the aggregate goal instead.";

             throw new MojoExecutionException(msg);

         }

     }

     /**

      * Generates the Dependency-Check Site Report.

      *

      * @param sink the sink to write the report to

      * @param locale the locale to use when generating the report

      * @throws MavenReportException if a maven report exception occurs

      * @deprecated use {@link #generate(org.apache.maven.doxia.sink.Sink, java.util.Locale)} instead.

      */

     @Override

     @Deprecated

     public final void generate(@SuppressWarnings("deprecation") org.codehaus.doxia.sink.Sink sink, Locale locale) throws MavenReportException {

         generate((Sink) sink, locale);

     }

     /**

      * Generates the Dependency-Check Site Report.

      *

      * @param sink the sink to write the report to

      * @param locale the locale to use when generating the report

      * @throws MavenReportException if a maven report exception occurs

      */

     public void generate(Sink sink, Locale locale) throws MavenReportException {

         try {

             validateAggregate();

         } catch (MojoExecutionException ex) {

             throw new MavenReportException(ex.getMessage());

         }

         project.setContextValue(getOutputDirectoryContextKey(), getReportOutputDirectory());

         try {

             runCheck();

         } catch (MojoExecutionException ex) {

             throw new MavenReportException(ex.getMessage(), ex);

         } catch (MojoFailureException ex) {

             getLog().warn("Vulnerabilities were identifies that exceed the CVSS threshold for failing the build");

         }

     }

     /**

      * Returns the correct output directory depending on if a site is being executed or not.

      *

      * @return the directory to write the report(s)

      * @throws MojoExecutionException thrown if there is an error loading the file path

      */

     protected File getCorrectOutputDirectory() throws MojoExecutionException {

         return getCorrectOutputDirectory(this.project);

     }

     /**

      * Returns the correct output directory depending on if a site is being executed or not.

      *

      * @param current the Maven project to get the output directory from

      * @return the directory to write the report(s)

      */

     protected File getCorrectOutputDirectory(MavenProject current) {

         final Object obj = current.getContextValue(getOutputDirectoryContextKey());

         if (obj != null && obj instanceof File) {

             return (File) obj;

         }

         File target = new File(current.getBuild().getDirectory());

         if (target.getParentFile() != null && "target".equals(target.getParentFile().getName())) {

             target = target.getParentFile();

         }

         return target;

     }

     /**

      * Returns the correct output directory depending on if a site is being executed or not.

      *

      * @param current the Maven project to get the output directory from

      * @return the directory to write the report(s)

      */

     protected File getDataFile(MavenProject current) {

         if (getLog().isDebugEnabled()) {

             getLog().debug(String.format("Getting data filefor %s using key '%s'", current.getName(), getDataFileContextKey()));

         }

         final Object obj = current.getContextValue(getDataFileContextKey());

         if (obj != null) {

             if (obj instanceof String) {

                 final File f = new File((String) obj);

                 return f;

             }

         } else {

             if (getLog().isDebugEnabled()) {

                 getLog().debug("Context value not found");

             }

         }

         return null;

     }

     /**

      * Scans the project's artifacts and adds them to the engine's dependency list.

      *

      * @param project the project to scan the dependencies of

      * @param engine the engine to use to scan the dependencies

      */

     protected void scanArtifacts(MavenProject project, Engine engine) {

         for (Artifact a : project.getArtifacts()) {

             if (excludeFromScan(a)) {

                 continue;

             }

             final List<Dependency> deps = engine.scan(a.getFile().getAbsoluteFile());

             if (deps != null) {

                 if (deps.size() == 1) {

                     final Dependency d = deps.get(0);

                     if (d != null) {

                         final MavenArtifact ma = new MavenArtifact(a.getGroupId(), a.getArtifactId(), a.getVersion());

                         d.addAsEvidence("pom", ma, Confidence.HIGHEST);

                         d.addProjectReference(project.getName());

                         if (getLog().isDebugEnabled()) {

                             getLog().debug(String.format("Adding project reference %s on dependency %s", project.getName(),

                                     d.getDisplayFileName()));

                         }

                     }

                 } else {

                     if (getLog().isDebugEnabled()) {

                         final String msg = String.format("More then 1 dependency was identified in first pass scan of '%s:%s:%s'",

                                 a.getGroupId(), a.getArtifactId(), a.getVersion());

                         getLog().debug(msg);

                     }

                 }

             }

         }

     }

     /**

      * Executes the dependency-check scan and generates the necassary report.

      *

      * @throws MojoExecutionException thrown if there is an exception running the scan

      * @throws MojoFailureException thrown if dependency-check is configured to fail the build

      */

     public abstract void runCheck() throws MojoExecutionException, MojoFailureException;

     /**

      * Sets the Reporting output directory.

      *

      * @param directory the output directory

      */

     @Override

     public void setReportOutputDirectory(File directory) {

         reportOutputDirectory = directory;

     }

     /**

      * Returns the report output directory.

      *

      * @return the report output directory

      */

     @Override

     public File getReportOutputDirectory() {

         return reportOutputDirectory;

     }

     /**

      * Returns the output directory.

      *

      * @return the output directory

      */

     public File getOutputDirectory() {

         return outputDirectory;

     }

     /**

      * Returns whether this is an external report. This method always returns true.

      *

      * @return <code>true</code>

      */

     @Override

     public final boolean isExternalReport() {

         return true;

     }

     /**

      * Returns the output name.

      *

      * @return the output name

      */

     @Override

     public String getOutputName() {

         if ("HTML".equalsIgnoreCase(this.format) || "ALL".equalsIgnoreCase(this.format)) {

             return "dependency-check-report";

         } else if ("XML".equalsIgnoreCase(this.format)) {

             return "dependency-check-report.xml#";

         } else if ("VULN".equalsIgnoreCase(this.format)) {

             return "dependency-check-vulnerability";

         } else {

             getLog().warn("Unknown report format used during site generation.");

             return "dependency-check-report";

         }

     }

     /**

      * Returns the category name.

      *

      * @return the category name

      */

     @Override

     public String getCategoryName() {

         return MavenReport.CATEGORY_PROJECT_REPORTS;

     }

     //</editor-fold>

     /**

      * Initializes a new <code>Engine</code> that can be used for scanning.

      *

      * @return a newly instantiated <code>Engine</code>

      * @throws DatabaseException thrown if there is a database exception

      */

     protected Engine initializeEngine() throws DatabaseException {

         populateSettings();

         return new Engine(this.project,

                 this.reactorProjects);

     }

     /**

      * Takes the properties supplied and updates the dependency-check settings. Additionally, this sets the system properties

      * required to change the proxy url, port, and connection timeout.

      */

     protected void populateSettings() {

         Settings.initialize();

         InputStream mojoProperties = null;

         try {

             mojoProperties = this.getClass().getClassLoader().getResourceAsStream(PROPERTIES_FILE);

             Settings.mergeProperties(mojoProperties);

         } catch (IOException ex) {

             getLog().warn("Unable to load the dependency-check ant task.properties file.");

             if (getLog().isDebugEnabled()) {

                 getLog().debug("", ex);

             }

         } finally {

             if (mojoProperties != null) {

                 try {

                     mojoProperties.close();

                 } catch (IOException ex) {

                     if (getLog().isDebugEnabled()) {

                         getLog().debug("", ex);

                     }

                 }

             }

         }

         Settings.setBoolean(Settings.KEYS.AUTO_UPDATE, autoUpdate);

         if (externalReport != null) {

             getLog().warn("The 'externalReport' option was set; this configuration option has been removed. "

                     + "Please update the dependency-check-maven plugin's configuration");

         }

         if (proxyUrl != null && !proxyUrl.isEmpty()) {

             getLog().warn("Deprecated configuration detected, proxyUrl will be ignored; use the maven settings " + "to configure the proxy instead");

         }

         final Proxy proxy = getMavenProxy();

         if (proxy != null) {

             Settings.setString(Settings.KEYS.PROXY_SERVER, proxy.getHost());

             Settings.setString(Settings.KEYS.PROXY_PORT, Integer.toString(proxy.getPort()));

             final String userName = proxy.getUsername();

             final String password = proxy.getPassword();

             if (userName != null) {

                 Settings.setString(Settings.KEYS.PROXY_USERNAME, userName);

             }

             if (password != null) {

                 Settings.setString(Settings.KEYS.PROXY_PASSWORD, password);

             }

         }

         if (connectionTimeout != null && !connectionTimeout.isEmpty()) {

             Settings.setString(Settings.KEYS.CONNECTION_TIMEOUT, connectionTimeout);

         }

         if (suppressionFile != null && !suppressionFile.isEmpty()) {

             Settings.setString(Settings.KEYS.SUPPRESSION_FILE, suppressionFile);

         }

         //File Type Analyzer Settings

         //JAR ANALYZER

         Settings.setBoolean(Settings.KEYS.ANALYZER_JAR_ENABLED, jarAnalyzerEnabled);

         //NUSPEC ANALYZER

         Settings.setBoolean(Settings.KEYS.ANALYZER_NUSPEC_ENABLED, nuspecAnalyzerEnabled);

         //NEXUS ANALYZER

         Settings.setBoolean(Settings.KEYS.ANALYZER_CENTRAL_ENABLED, centralAnalyzerEnabled);

         //NEXUS ANALYZER

         Settings.setBoolean(Settings.KEYS.ANALYZER_NEXUS_ENABLED, nexusAnalyzerEnabled);

         if (nexusUrl != null && !nexusUrl.isEmpty()) {

             Settings.setString(Settings.KEYS.ANALYZER_NEXUS_URL, nexusUrl);

         }

         Settings.setBoolean(Settings.KEYS.ANALYZER_NEXUS_PROXY, nexusUsesProxy);

         //ARCHIVE ANALYZER

         Settings.setBoolean(Settings.KEYS.ANALYZER_ARCHIVE_ENABLED, archiveAnalyzerEnabled);

         if (zipExtensions != null && !zipExtensions.isEmpty()) {

             Settings.setString(Settings.KEYS.ADDITIONAL_ZIP_EXTENSIONS, zipExtensions);

         }

         //ASSEMBLY ANALYZER

         Settings.setBoolean(Settings.KEYS.ANALYZER_ASSEMBLY_ENABLED, assemblyAnalyzerEnabled);

         if (pathToMono != null && !pathToMono.isEmpty()) {

             Settings.setString(Settings.KEYS.ANALYZER_ASSEMBLY_MONO_PATH, pathToMono);

         }

         //Database configuration

         if (databaseDriverName != null && !databaseDriverName.isEmpty()) {

             Settings.setString(Settings.KEYS.DB_DRIVER_NAME, databaseDriverName);

         }

         if (databaseDriverPath != null && !databaseDriverPath.isEmpty()) {

             Settings.setString(Settings.KEYS.DB_DRIVER_PATH, databaseDriverPath);

         }

         if (connectionString != null && !connectionString.isEmpty()) {

             Settings.setString(Settings.KEYS.DB_CONNECTION_STRING, connectionString);

         }

         if (databaseUser != null && !databaseUser.isEmpty()) {

             Settings.setString(Settings.KEYS.DB_USER, databaseUser);

         }

         if (databasePassword != null && !databasePassword.isEmpty()) {

             Settings.setString(Settings.KEYS.DB_PASSWORD, databasePassword);

         }

         // Data Directory

         if (dataDirectory != null && !dataDirectory.isEmpty()) {

             Settings.setString(Settings.KEYS.DATA_DIRECTORY, dataDirectory);

         }

         // Scope Exclusion

         Settings.setBoolean(Settings.KEYS.SKIP_TEST_SCOPE, skipTestScope);

         Settings.setBoolean(Settings.KEYS.SKIP_RUNTIME_SCOPE, skipRuntimeScope);

         Settings.setBoolean(Settings.KEYS.SKIP_PROVIDED_SCOPE, skipProvidedScope);

         // CVE Data Mirroring

         if (cveUrl12Modified != null && !cveUrl12Modified.isEmpty()) {

             Settings.setString(Settings.KEYS.CVE_MODIFIED_12_URL, cveUrl12Modified);

         }

         if (cveUrl20Modified != null && !cveUrl20Modified.isEmpty()) {

             Settings.setString(Settings.KEYS.CVE_MODIFIED_20_URL, cveUrl20Modified);

         }

         if (cveUrl12Base != null && !cveUrl12Base.isEmpty()) {

             Settings.setString(Settings.KEYS.CVE_SCHEMA_1_2, cveUrl12Base);

         }

         if (cveUrl20Base != null && !cveUrl20Base.isEmpty()) {

             Settings.setString(Settings.KEYS.CVE_SCHEMA_2_0, cveUrl20Base);

         }

     }

     /**

      * Returns the maven proxy.

      *

      * @return the maven proxy

      */

     private Proxy getMavenProxy() {

         if (mavenSettings != null) {

             final List<Proxy> proxies = mavenSettings.getProxies();

             if (proxies != null && !proxies.isEmpty()) {

                 if (mavenSettingsProxyId != null) {

                     for (Proxy proxy : proxies) {

                         if (mavenSettingsProxyId.equalsIgnoreCase(proxy.getId())) {

                             return proxy;

                         }

                     }

                 } else if (proxies.size() == 1) {

                     return proxies.get(0);

                 } else {

                     getLog().warn("Multiple proxy definitions exist in the Maven settings. In the dependency-check "

                             + "configuration set the mavenSettingsProxyId so that the correct proxy will be used.");

                     throw new IllegalStateException("Ambiguous proxy definition");

                 }

             }

         }

         return null;

     }

     /**

      * Tests is the artifact should be included in the scan (i.e. is the dependency in a scope that is being scanned).

      *

      * @param a the Artifact to test

      * @return <code>true</code> if the artifact is in an excluded scope; otherwise <code>false</code>

      */

     protected boolean excludeFromScan(Artifact a) {

         if (skipTestScope && Artifact.SCOPE_TEST.equals(a.getScope())) {

             return true;

         }

         if (skipProvidedScope && Artifact.SCOPE_PROVIDED.equals(a.getScope())) {

             return true;

         }

         if (skipRuntimeScope && !Artifact.SCOPE_RUNTIME.equals(a.getScope())) {

             return true;

         }

         return false;

     }

     /**

      * Returns a reference to the current project. This method is used instead of auto-binding the project via component

      * annotation in concrete implementations of this. If the child has a <code>@Component MavenProject project;</code> defined

      * then the abstract class (i.e. this class) will not have access to the current project (just the way Maven works with the

      * binding).

      *

      * @return returns a reference to the current project

      */

     protected MavenProject getProject() {

         return project;

     }

     /**

      * Returns the list of Maven Projects in this build.

      *

      * @return the list of Maven Projects in this build

      */

     protected List<MavenProject> getReactorProjects() {

         return reactorProjects;

     }

     /**

      * Returns the report format.

      *

      * @return the report format

      */

     protected String getFormat() {

         return format;

     }

     /**

      * Generates the reports for a given dependency-check engine.

      *

      * @param engine a dependency-check engine

      * @param p the maven project

      * @param outputDir the directory path to write the report(s).

      */

     protected void writeReports(Engine engine, MavenProject p, File outputDir) {

         DatabaseProperties prop = null;

         CveDB cve = null;

         try {

             cve = new CveDB();

             cve.open();

             prop = cve.getDatabaseProperties();

         } catch (DatabaseException ex) {

             if (getLog().isDebugEnabled()) {

                 getLog().debug("Unable to retrieve DB Properties", ex);

             }

         } finally {

             if (cve != null) {

                 cve.close();

             }

         }

         final ReportGenerator r = new ReportGenerator(p.getName(), engine.getDependencies(), engine.getAnalyzers(), prop);

         try {

             r.generateReports(outputDir.getAbsolutePath(), format);

         } catch (IOException ex) {

             getLog().error(

                     "Unexpected exception occurred during analysis; please see the verbose error log for more details.");

             if (getLog().isDebugEnabled()) {

                 getLog().debug("", ex);

             }

         } catch (Throwable ex) {

             getLog().error(

                     "Unexpected exception occurred during analysis; please see the verbose error log for more details.");

             if (getLog().isDebugEnabled()) {

                 getLog().debug("", ex);

             }

         }

     }

     //<editor-fold defaultstate="collapsed" desc="Methods to fail build or show summary">

     /**

      * Checks to see if a vulnerability has been identified with a CVSS score that is above the threshold set in the

      * configuration.

      *

      * @param dependencies the list of dependency objects

      * @throws MojoFailureException thrown if a CVSS score is found that is higher then the threshold set

      */

     protected void checkForFailure(List<Dependency> dependencies) throws MojoFailureException {

         if (failBuildOnCVSS <= 10) {

             final StringBuilder ids = new StringBuilder();

             for (Dependency d : dependencies) {

                 boolean addName = true;

                 for (Vulnerability v : d.getVulnerabilities()) {

                     if (v.getCvssScore() >= failBuildOnCVSS) {

                         if (addName) {

                             addName = false;

                             ids.append(NEW_LINE).append(d.getFileName()).append(": ");

                             ids.append(v.getName());

                         } else {

                             ids.append(", ").append(v.getName());

                         }

                     }

                 }

             }

             if (ids.length() > 0) {

                 final String msg = String.format("%n%nDependency-Check Failure:%n"

                         + "One or more dependencies were identified with vulnerabilities that have a CVSS score greater then '%.1f': %s%n"

                         + "See the dependency-check report for more details.%n%n", failBuildOnCVSS, ids.toString());

                 throw new MojoFailureException(msg);

             }

         }

     }

     /**

      * Generates a warning message listing a summary of dependencies and their associated CPE and CVE entries.

      *

      * @param mp the Maven project for which the summary is shown

      * @param dependencies a list of dependency objects

      */

     protected void showSummary(MavenProject mp, List<Dependency> dependencies) {

         if (showSummary) {

             final StringBuilder summary = new StringBuilder();

             for (Dependency d : dependencies) {

                 boolean firstEntry = true;

                 final StringBuilder ids = new StringBuilder();

                 for (Vulnerability v : d.getVulnerabilities()) {

                     if (firstEntry) {

                         firstEntry = false;

                     } else {

                         ids.append(", ");

                     }

                     ids.append(v.getName());

                 }

                 if (ids.length() > 0) {

                     summary.append(d.getFileName()).append(" (");

                     firstEntry = true;

                     for (Identifier id : d.getIdentifiers()) {

                         if (firstEntry) {

                             firstEntry = false;

                         } else {

                             summary.append(", ");

                         }

                         summary.append(id.getValue());

                     }

                     summary.append(") : ").append(ids).append(NEW_LINE);

                 }

             }

             if (summary.length() > 0) {

                 final String msg = String.format("%n%n" + "One or more dependencies were identified with known vulnerabilities in %s:%n%n%s"

                         + "%n%nSee the dependency-check report for more details.%n%n", mp.getName(), summary.toString());

                 getLog().warn(msg);

             }

         }

     }

     //</editor-fold>

     //<editor-fold defaultstate="collapsed" desc="Methods to read/write the serialized data file">

     /**

      * Returns the key used to store the path to the data file that is saved by <code>writeDataFile()</code>. This key is used in

      * the <code>MavenProject.(set|get)ContextValue</code>.

      *

      * @return the key used to store the path to the data file

      */

     protected String getDataFileContextKey() {

         return "dependency-check-path-" + dataFileName;

     }

     /**

      * Returns the key used to store the path to the output directory. When generating the report in the

      * <code>executeAggregateReport()</code> the output directory should be obtained by using this key.

      *

      * @return the key used to store the path to the output directory

      */

     protected String getOutputDirectoryContextKey() {

         return "dependency-output-dir-" + dataFileName;

     }

     /**

      * Writes the scan data to disk. This is used to serialize the scan data between the "check" and "aggregate" phase.

      *

      * @param mp the mMven project for which the data file was created

      * @param writeTo the directory to write the data file

      * @param dependencies the list of dependencies to serialize

      */

     protected void writeDataFile(MavenProject mp, File writeTo, List<Dependency> dependencies) {

         File file;

         //check to see if this was already written out

         if (mp.getContextValue(this.getDataFileContextKey()) == null) {

             if (writeTo == null) {

                 file = new File(mp.getBuild().getDirectory());

                 file = new File(file, dataFileName);

             } else {

                 file = new File(writeTo, dataFileName);

             }

             final File parent = file.getParentFile();

             if (!parent.isDirectory() && parent.mkdirs()) {

                 getLog().error(String.format("Directory '%s' does not exist and cannot be created; unable to write data file.",

                         parent.getAbsolutePath()));

             }

             OutputStream os = null;

             OutputStream bos = null;

             ObjectOutputStream out = null;

             try {

                 if (dependencies != null) {

                     os = new FileOutputStream(file);

                     bos = new BufferedOutputStream(os);

                     out = new ObjectOutputStream(bos);

                     out.writeObject(dependencies);

                     out.flush();

                     //call reset to prevent resource leaks per

                     //https://www.securecoding.cert.org/confluence/display/java/SER10-J.+Avoid+memory+and+resource+leaks+during+serialization

                     out.reset();

                 }

                 if (getLog().isDebugEnabled()) {

                     getLog().debug(String.format("Serialized data file written to '%s' for %s, referenced by key %s",

                             file.getAbsolutePath(), mp.getName(), this.getDataFileContextKey()));

                 }

                 mp.setContextValue(this.getDataFileContextKey(), file.getAbsolutePath());

             } catch (IOException ex) {

                 getLog().warn("Unable to create data file used for report aggregation; "

                         + "if report aggregation is being used the results may be incomplete.");

                 if (getLog().isDebugEnabled()) {

                     getLog().debug(ex.getMessage(), ex);

                 }

             } finally {

                 if (out != null) {

                     try {

                         out.close();

                     } catch (IOException ex) {

                         if (getLog().isDebugEnabled()) {

                             getLog().debug("ignore", ex);

                         }

                     }

                 }

                 if (bos != null) {

                     try {

                         bos.close();

                     } catch (IOException ex) {

                         if (getLog().isDebugEnabled()) {

                             getLog().debug("ignore", ex);

                         }

                     }

                 }

                 if (os != null) {

                     try {

                         os.close();

                     } catch (IOException ex) {

                         if (getLog().isDebugEnabled()) {

                             getLog().debug("ignore", ex);

                         }

                     }

                 }

             }

         }

     }

     /**

      * Reads the serialized scan data from disk. This is used to serialize the scan data between the "check" and "aggregate"

      * phase.

      *

      * @param project the Maven project to read the data file from

      * @return a <code>Engine</code> object populated with dependencies if the serialized data file exists; otherwise

      * <code>null</code> is returned

      */

     protected List<Dependency> readDataFile(MavenProject project) {

         final Object oPath = project.getContextValue(this.getDataFileContextKey());

         if (oPath == null) {

             return null;

         }

         List<Dependency> ret = null;

         final String path = (String) oPath;

         ObjectInputStream ois = null;

         try {

             ois = new ObjectInputStream(new FileInputStream(path));

             ret = (List<Dependency>) ois.readObject();

         } catch (FileNotFoundException ex) {

             //TODO fix logging

             getLog().error("", ex);

         } catch (IOException ex) {

             getLog().error("", ex);

         } catch (ClassNotFoundException ex) {

             getLog().error("", ex);

         } finally {

             if (ois != null) {

                 try {

                     ois.close();

                 } catch (IOException ex) {

                     getLog().error("", ex);

                 }

             }

         }

         return ret;

     }

     //</editor-fold>

 }