Issue #8786 - add configuration for KeyStoreScanner to not resolve aliases

Signed-off-by: Lachlan Roberts <lachlan@webtide.com>

jetty-util/src/main/java/org/eclipse/jetty/util/ssl/KeyStoreScanner.java

@@ -43,6 +43,11 @@ public class KeyStoreScanner extends ContainerLifeCycle implements Scanner.Discr
     private final Scanner _scanner;
 
     public KeyStoreScanner(SslContextFactory sslContextFactory)
+    {
+        this(sslContextFactory, false);
+    }
+
+    public KeyStoreScanner(SslContextFactory sslContextFactory, boolean resolveAlias)
     {
         this.sslContextFactory = sslContextFactory;
         try
@@ -54,9 +59,9 @@ public class KeyStoreScanner extends ContainerLifeCycle implements Scanner.Discr
             if (monitoredFile.isDirectory())
                 throw new IllegalArgumentException("expected keystore file not directory");
 
-            if (keystoreResource.getAlias() != null)
+            if (resolveAlias && keystoreResource.isAlias())
             {
-                // this resource has an alias, use the alias, as that's what's returned in the Scanner
+                // This resource has an alias, so monitor the target of the alias.
                 monitoredFile = new File(keystoreResource.getAlias());
             }
 
@@ -73,7 +78,7 @@ public class KeyStoreScanner extends ContainerLifeCycle implements Scanner.Discr
         if (!parentFile.exists() || !parentFile.isDirectory())
             throw new IllegalArgumentException("error obtaining keystore dir");
 
-        _scanner = new Scanner();
+        _scanner = new Scanner(null, resolveAlias);
         _scanner.addDirectory(parentFile.toPath());
         _scanner.setScanInterval(1);
         _scanner.setReportDirs(false);

tests/test-integration/src/test/java/org/eclipse/jetty/test/KeyStoreScannerTest.java

@@ -87,6 +87,11 @@ public class KeyStoreScannerTest
     }
 
     public void start(Configuration configuration) throws Exception
+    {
+        start(configuration, true);
+    }
+
+    public void start(Configuration configuration, boolean resolveAlias) throws Exception
     {
         SslContextFactory.Server sslContextFactory = new SslContextFactory.Server();
         configuration.configure(sslContextFactory);
@@ -100,7 +105,7 @@ public class KeyStoreScannerTest
         server.addConnector(connector);
 
         // Configure Keystore Reload.
-        keystoreScanner = new KeyStoreScanner(sslContextFactory);
+        keystoreScanner = new KeyStoreScanner(sslContextFactory, resolveAlias);
         keystoreScanner.setScanInterval(0);
         server.addBean(keystoreScanner);
 
@@ -182,22 +187,25 @@ public class KeyStoreScannerTest
     public void testReloadChangingSymbolicLink() throws Exception
     {
         assumeFileSystemSupportsSymlink();
-        Path keystorePath = keystoreDir.resolve("symlinkKeystore");
+        Path newKeystore = useKeystore("newKeystore", "newKeystore");
+        Path oldKeystore = useKeystore("oldKeystore", "oldKeystore");
+
+        Path symlinkKeystorePath = keystoreDir.resolve("symlinkKeystore");
         start(sslContextFactory ->
         {
-            Files.createSymbolicLink(keystorePath, useKeystore("oldKeystore"));
-            sslContextFactory.setKeyStorePath(keystorePath.toString());
+            Files.createSymbolicLink(symlinkKeystorePath, oldKeystore);
+            sslContextFactory.setKeyStorePath(symlinkKeystorePath.toString());
             sslContextFactory.setKeyStorePassword("storepwd");
             sslContextFactory.setKeyManagerPassword("keypwd");
-        });
+        }, false);
 
         // Check the original certificate expiry.
         X509Certificate cert1 = getCertificateFromServer();
         assertThat(getExpiryYear(cert1), is(2015));
 
         // Change the symlink to point to the newKeystore file location which has a later expiry date.
-        Files.delete(keystorePath);
-        Files.createSymbolicLink(keystorePath, useKeystore("newKeystore"));
+        Files.delete(symlinkKeystorePath);
+        Files.createSymbolicLink(symlinkKeystorePath, newKeystore);
         keystoreScanner.scan(5000);
 
         // The scanner should have detected the updated keystore, expiry should be renewed.
@@ -237,6 +245,24 @@ public class KeyStoreScannerTest
         assertThat(getExpiryYear(cert2), is(2020));
     }
 
+    public Path useKeystore(String keystoreToUse, String keystorePath) throws Exception
+    {
+        return useKeystore(MavenTestingUtils.getTestResourcePath(keystoreToUse), keystoreDir.resolve(keystorePath));
+    }
+
+    public Path useKeystore(Path keystoreToUse, Path keystorePath) throws Exception
+    {
+        if (Files.exists(keystorePath))
+            Files.delete(keystorePath);
+
+        Files.copy(keystoreToUse, keystorePath);
+
+        if (!Files.exists(keystorePath))
+            throw new IllegalStateException("keystore file was not created");
+
+        return keystorePath.toAbsolutePath();
+    }
+
     public Path useKeystore(String keystore) throws Exception
     {
         Path keystorePath = keystoreDir.resolve("keystore");