Add trusted certificate to allow downloads from motherless (fixes issue #2009)

src/main/java/com/rarchives/ripme/App.java

@@ -68,6 +68,16 @@ public static void main(String[] args) throws MalformedURLException {
             Proxy.setSocks(Utils.getConfigString("proxy.socks", null));
         }
 
+        // Attempt to load keystore to enable use of custom certificate authorities
+        try
+		{
+			Utils.setTrustStore ("/custom-certificate-store");
+		}
+		catch (Exception e)
+		{
+			logger.warn ("Failed to load custom certificate store", e);
+		}
+
         // This has to be here instead of handleArgs because handleArgs isn't parsed until after a item is ripper
         if (cl.hasOption("a")) {
             logger.info(cl.getOptionValue("a"));

src/main/java/com/rarchives/ripme/utils/Utils.java

@@ -17,6 +17,7 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.security.KeyStore;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -34,6 +35,9 @@
 import java.util.regex.Pattern;
 import java.util.stream.Stream;
 
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.TrustManager;
+import javax.net.ssl.TrustManagerFactory;
 import javax.sound.sampled.AudioSystem;
 import javax.sound.sampled.Clip;
 import javax.sound.sampled.Line;
@@ -886,4 +890,18 @@ public static File shortenSaveAsWindows(String ripsDirPath, String fileName) thr
         return new File(fullPath);
     }
 
+    public static void setTrustStore(String trustStore) throws Exception {
+    	LOGGER.info ("Loading trust store " + trustStore);
+        TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance("X509");
+        KeyStore keystore = KeyStore.getInstance(KeyStore.getDefaultType());
+        InputStream keystoreStream = Utils.class.getResourceAsStream(trustStore);
+        if (keystoreStream == null) throw new IllegalArgumentException ("trustStore " + trustStore + " not found");
+        keystore.load(keystoreStream, null);
+        trustManagerFactory.init(keystore);
+        TrustManager[] trustManagers = trustManagerFactory.getTrustManagers();
+        SSLContext sc = SSLContext.getInstance("SSL");
+        sc.init(null, trustManagers, null);
+        SSLContext.setDefault(sc);
+    }
+
 }