From b09d222f3416d155153a681ed256c46fbf5b386a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dominik=20Sch=C3=BCrmann?= <dominik@dominikschuermann.de>
Date: Wed, 17 Sep 2014 21:51:25 +0200
Subject: package reordering: merge util and helper, there were no real
 difference; created ui.util for everything related to formatting

---
 .../keychain/util/TlsHelper.java                   | 133 +++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/TlsHelper.java

(limited to 'OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/TlsHelper.java')

diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/TlsHelper.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/TlsHelper.java
new file mode 100644
index 000000000..9946d81aa
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/TlsHelper.java
@@ -0,0 +1,133 @@
+/*
+ * Copyright (C) 2013-2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sufficientlysecure.keychain.util;
+
+import android.content.res.AssetManager;
+
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.util.Log;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.net.URLConnection;
+import java.security.KeyManagementException;
+import java.security.KeyStore;
+import java.security.KeyStoreException;
+import java.security.NoSuchAlgorithmException;
+import java.security.cert.Certificate;
+import java.security.cert.CertificateException;
+import java.security.cert.CertificateFactory;
+import java.util.HashMap;
+import java.util.Map;
+
+import javax.net.ssl.HttpsURLConnection;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.TrustManagerFactory;
+
+public class TlsHelper {
+
+    public static class TlsHelperException extends Exception {
+        public TlsHelperException(Exception e) {
+            super(e);
+        }
+    }
+
+    private static Map<String, byte[]> sStaticCA = new HashMap<String, byte[]>();
+
+    public static void addStaticCA(String domain, byte[] certificate) {
+        sStaticCA.put(domain, certificate);
+    }
+
+    public static void addStaticCA(String domain, AssetManager assetManager, String name) {
+        try {
+            InputStream is = assetManager.open(name);
+            ByteArrayOutputStream baos = new ByteArrayOutputStream();
+            int reads = is.read();
+
+            while(reads != -1){
+                baos.write(reads);
+                reads = is.read();
+            }
+
+            is.close();
+
+            addStaticCA(domain, baos.toByteArray());
+        } catch (IOException e) {
+            Log.w(Constants.TAG, e);
+        }
+    }
+
+    public static URLConnection openConnection(URL url) throws IOException, TlsHelperException {
+        if (url.getProtocol().equals("https")) {
+            for (String domain : sStaticCA.keySet()) {
+                if (url.getHost().endsWith(domain)) {
+                    return openCAConnection(sStaticCA.get(domain), url);
+                }
+            }
+        }
+        return url.openConnection();
+    }
+
+    /**
+     * Opens a Connection that will only accept certificates signed with a specific CA and skips common name check.
+     * This is required for some distributed Keyserver networks like sks-keyservers.net
+     *
+     * @param certificate The X.509 certificate used to sign the servers certificate
+     * @param url         Connection target
+     */
+    public static HttpsURLConnection openCAConnection(byte[] certificate, URL url)
+            throws TlsHelperException, IOException {
+        try {
+            // Load CA
+            CertificateFactory cf = CertificateFactory.getInstance("X.509");
+            Certificate ca = cf.generateCertificate(new ByteArrayInputStream(certificate));
+
+            // Create a KeyStore containing our trusted CAs
+            String keyStoreType = KeyStore.getDefaultType();
+            KeyStore keyStore = KeyStore.getInstance(keyStoreType);
+            keyStore.load(null, null);
+            keyStore.setCertificateEntry("ca", ca);
+
+            // Create a TrustManager that trusts the CAs in our KeyStore
+            String tmfAlgorithm = TrustManagerFactory.getDefaultAlgorithm();
+            TrustManagerFactory tmf = TrustManagerFactory.getInstance(tmfAlgorithm);
+            tmf.init(keyStore);
+
+            // Create an SSLContext that uses our TrustManager
+            SSLContext context = SSLContext.getInstance("TLS");
+            context.init(null, tmf.getTrustManagers(), null);
+
+            // Tell the URLConnection to use a SocketFactory from our SSLContext
+            HttpsURLConnection urlConnection = (HttpsURLConnection) url.openConnection();
+            urlConnection.setSSLSocketFactory(context.getSocketFactory());
+
+            return urlConnection;
+        } catch (CertificateException e) {
+            throw new TlsHelperException(e);
+        } catch (NoSuchAlgorithmException e) {
+            throw new TlsHelperException(e);
+        } catch (KeyStoreException e) {
+            throw new TlsHelperException(e);
+        } catch (KeyManagementException e) {
+            throw new TlsHelperException(e);
+        }
+    }
+}
-- 
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