feat: package and utilize generated suppression file

core/pom.xml

@@ -100,6 +100,24 @@ Copyright (c) 2012 Jeremy Long. All Rights Reserved.
             </testResource>
         </testResources>
         <plugins>
+            <plugin>
+                <groupId>io.github.download-maven-plugin</groupId>
+                <artifactId>download-maven-plugin</artifactId>
+                <executions>
+                    <execution>
+                        <id>download-published-suppressions</id>
+                        <phase>generate-resources</phase>
+                        <goals>
+                            <goal>wget</goal>
+                        </goals>
+                        <configuration>
+                            <url>https://dependency-check.github.io/DependencyCheck/suppressions/publishedSuppressions.xml</url>
+                            <outputDirectory>${project.build.directory}/classes</outputDirectory>
+                            <outputFileName>dependencycheck-hosted-suppression-snapshot.xml</outputFileName>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
             <plugin>
                 <groupId>org.jsonschema2pojo</groupId>
                 <artifactId>jsonschema2pojo-maven-plugin</artifactId>

core/src/main/java/org/owasp/dependencycheck/analyzer/AbstractSuppressionAnalyzer.java

@@ -30,6 +30,8 @@
 import java.util.Set;
 import java.util.regex.Pattern;
 import javax.annotation.concurrent.ThreadSafe;
+
+import org.jetbrains.annotations.NotNull;
 import org.owasp.dependencycheck.Engine;
 import org.owasp.dependencycheck.analyzer.exception.AnalysisException;
 import org.owasp.dependencycheck.data.update.HostedSuppressionsDataSource;
@@ -68,6 +70,10 @@ public abstract class AbstractSuppressionAnalyzer extends AbstractAnalyzer {
      * The file name of the base suppression XML file.
      */
     private static final String BASE_SUPPRESSION_FILE = "dependencycheck-base-suppression.xml";
+    /**
+     * The file name of the snapshot of the hosted suppression XML file.
+     */
+    private static final String HOSTED_SUPPRESSION_SNAPSHOT_FILE = "dependencycheck-hosted-suppression-snapshot.xml";
     /**
      * The key used to store and retrieve the suppression files.
      */
@@ -188,31 +194,15 @@ private void loadSuppressionBaseData(final Engine engine) throws SuppressionPars
     }
 
     /**
-     * Loads the base suppression rules packaged with the application.
+     * Loads the suppression rules packaged with the application.
      *
      * @param parser The suppression parser to use
      * @param engine a reference the dependency-check engine
      * @throws SuppressionParseException thrown if the XML cannot be parsed.
      */
     private void loadPackagedSuppressionBaseData(final SuppressionParser parser, final Engine engine) throws SuppressionParseException {
         List<SuppressionRule> ruleList = null;
-        final URL jarLocation = AbstractSuppressionAnalyzer.class.getProtectionDomain().getCodeSource().getLocation();
-        String suppressionFileLocation = jarLocation.getFile();
-        if (suppressionFileLocation.endsWith(".jar")) {
-            suppressionFileLocation = "jar:file:" + suppressionFileLocation + "!/" + BASE_SUPPRESSION_FILE;
-        } else if (suppressionFileLocation.startsWith("nested:") && suppressionFileLocation.endsWith(".jar!/")) {
-            // suppressionFileLocation -> nested:/app/app.jar/!BOOT-INF/lib/dependency-check-core-<version>.jar!/
-            // goal->                 jar:nested:/app/app.jar/!BOOT-INF/lib/dependency-check-core-<version>.jar!/dependencycheck-base-suppression.xml
-            suppressionFileLocation = "jar:" + suppressionFileLocation + BASE_SUPPRESSION_FILE;
-        } else {
-            suppressionFileLocation = "file:" + suppressionFileLocation + BASE_SUPPRESSION_FILE;
-        }
-        URL baseSuppresssionURL = null;
-        try {
-            baseSuppresssionURL = new URL(suppressionFileLocation);
-        } catch (MalformedURLException e) {
-            throw new SuppressionParseException("Unable to load the base suppression data file", e);
-        }
+        URL baseSuppresssionURL = getPackagedFile(BASE_SUPPRESSION_FILE);
         try (InputStream in = baseSuppresssionURL.openStream()) {
             ruleList = parser.parseSuppressionRules(in);
         } catch (SAXException | IOException ex) {
@@ -229,6 +219,27 @@ private void loadPackagedSuppressionBaseData(final SuppressionParser parser, fin
         }
     }
 
+    private static @NotNull URL getPackagedFile(String packagedFileName) throws SuppressionParseException {
+        final URL jarLocation = AbstractSuppressionAnalyzer.class.getProtectionDomain().getCodeSource().getLocation();
+        String suppressionFileLocation = jarLocation.getFile();
+        if (suppressionFileLocation.endsWith(".jar")) {
+            suppressionFileLocation = "jar:file:" + suppressionFileLocation + "!/" + packagedFileName;
+        } else if (suppressionFileLocation.startsWith("nested:") && suppressionFileLocation.endsWith(".jar!/")) {
+            // suppressionFileLocation -> nested:/app/app.jar/!BOOT-INF/lib/dependency-check-core-<version>.jar!/
+            // goal->                 jar:nested:/app/app.jar/!BOOT-INF/lib/dependency-check-core-<version>.jar!/dependencycheck-base-suppression.xml
+            suppressionFileLocation = "jar:" + suppressionFileLocation + packagedFileName;
+        } else {
+            suppressionFileLocation = "file:" + suppressionFileLocation + packagedFileName;
+        }
+        URL baseSuppresssionURL = null;
+        try {
+            baseSuppresssionURL = new URL(suppressionFileLocation);
+        } catch (MalformedURLException e) {
+            throw new SuppressionParseException("Unable to load the base suppression data file", e);
+        }
+        return baseSuppresssionURL;
+    }
+
     /**
      * Loads all the base suppression rules from the hosted suppression file
      * generated/updated automatically by the FP Suppression GitHub Action for
@@ -242,31 +253,28 @@ private void loadPackagedSuppressionBaseData(final SuppressionParser parser, fin
      * @param parser The suppression parser to use
      */
     private void loadHostedSuppressionBaseData(final SuppressionParser parser, final Engine engine) {
-        final File repoFile;
-        boolean repoEmpty = false;
         final boolean enabled = getSettings().getBoolean(Settings.KEYS.HOSTED_SUPPRESSIONS_ENABLED, true);
         if (!enabled) {
             return;
         }
-        final boolean autoupdate = getSettings().getBoolean(Settings.KEYS.AUTO_UPDATE, true);
-        final boolean forceupdate = getSettings().getBoolean(Settings.KEYS.HOSTED_SUPPRESSIONS_FORCEUPDATE, false);
 
         try {
             final String configuredUrl = getSettings().getString(Settings.KEYS.HOSTED_SUPPRESSIONS_URL,
                     HostedSuppressionsDataSource.DEFAULT_SUPPRESSIONS_URL);
             final URL url = new URL(configuredUrl);
             final String fileName = new File(url.getPath()).getName();
-            repoFile = new File(getSettings().getDataDirectory(), fileName);
-            if (!repoFile.isFile() || repoFile.length() <= 1L) {
-                repoEmpty = true;
-                LOGGER.warn("Hosted Suppressions file is empty or missing - attempting to force the update");
-                getSettings().setBoolean(Settings.KEYS.HOSTED_SUPPRESSIONS_FORCEUPDATE, true);
-            }
-            if ((!autoupdate && forceupdate) || (autoupdate && repoEmpty)) {
-                if (engine == null) {
-                    LOGGER.warn("Engine was null, this should only happen in tests - skipping forced update");
-                } else {
-                    repoEmpty = forceUpdateHostedSuppressions(engine, repoFile);
+            final File repoFile = new File(getSettings().getDataDirectory(), fileName);
+            boolean repoEmpty = !repoFile.isFile() || repoFile.length() <= 1L;
+            if (repoEmpty) {
+                // utilize the snapshot hosted suppression file
+                URL hostedSuppressionSnapshotURL = getPackagedFile(HOSTED_SUPPRESSION_SNAPSHOT_FILE);
+                try (InputStream in = hostedSuppressionSnapshotURL.openStream()) {
+                    Files.copy(in, repoFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
+                    repoEmpty = false;
+                    LOGGER.debug("Copied hosted suppression snapshot file to {}", repoFile.toPath());
+                } catch (IOException ex) {
+                    LOGGER.warn("Unable to copy the hosted suppression snapshot file to {}, results may contain false positives "
+                            + "already resolved by the DependencyCheck project", repoFile.toPath(), ex);
                 }
             }
             if (!repoEmpty) {

pom.xml

@@ -187,6 +187,11 @@ Copyright (c) 2012 - Jeremy Long
         <defaultGoal>clean install</defaultGoal>
         <pluginManagement>
             <plugins>
+                <plugin>
+                    <groupId>io.github.download-maven-plugin</groupId>
+                    <artifactId>download-maven-plugin</artifactId>
+                    <version>2.0.0</version>
+                </plugin>
                 <plugin>
                     <groupId>org.jsonschema2pojo</groupId>
                     <artifactId>jsonschema2pojo-maven-plugin</artifactId>