Jelly: add dialog to show SSL certificate info

* Based off the same functionality from Soren Stoutner's Privacy Browser
  (https://git.stoutner.com/?p=PrivacyBrowser.git)

* Preview: https://goo.gl/DPYfUQ

Change-Id: I46d568ed794183f94f41dc5e5a4543df7917eb37
(cherry picked from commit 77b808bdcd817d6ce60374af8d1ba82f45b61f23)

6 files changed, 297 insertions, 2 deletions

diff --git a/app/src/main/java/org/lineageos/jelly/ui/KeyValueView.java b/app/src/main/java/org/lineageos/jelly/ui/KeyValueView.java
new file mode 100644
index 0000000..1a86360
--- /dev/null
+++ b/app/src/main/java/org/lineageos/jelly/ui/KeyValueView.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2017 The LineageOS Project
+ *
+ * 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.
+ */
+package org.lineageos.jelly.ui;
+
+import android.content.Context;
+import android.support.annotation.Nullable;
+import android.support.annotation.StringRes;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import org.lineageos.jelly.R;
+
+public class KeyValueView extends LinearLayout {
+    private TextView mKeyView;
+    private TextView mValueView;
+
+    public KeyValueView(Context context) {
+        super(context);
+        init();
+    }
+
+    public KeyValueView(Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+        init();
+    }
+
+    public KeyValueView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        init();
+    }
+
+    private void init() {
+        inflate(getContext(), R.layout.key_value_view, this);
+
+        mKeyView = (TextView) findViewById(R.id.key);
+        mValueView = (TextView) findViewById(R.id.value);
+    }
+
+    public void setText(@StringRes int attributeTextResId, String value) {
+        if (!value.isEmpty()) {
+            this.mKeyView.setText(attributeTextResId);
+            this.mValueView.setText(value);
+        } else {
+            setVisibility(View.GONE);
+        }
+    }
+}
diff --git a/app/src/main/java/org/lineageos/jelly/ui/UrlBarController.java b/app/src/main/java/org/lineageos/jelly/ui/UrlBarController.java
index a0e0a74..6422b46 100644
--- a/app/src/main/java/org/lineageos/jelly/ui/UrlBarController.java
+++ b/app/src/main/java/org/lineageos/jelly/ui/UrlBarController.java
@@ -15,9 +15,21 @@
  */
 package org.lineageos.jelly.ui;
 
+import android.app.AlertDialog;
+import android.content.Context;
+import android.net.Uri;
+import android.net.http.SslCertificate;
+import android.view.LayoutInflater;
 import android.view.View;
 import android.widget.EditText;
 import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import org.lineageos.jelly.R;
+
+import java.text.DateFormat;
+import java.util.Date;
 
 public class UrlBarController implements View.OnFocusChangeListener {
     private EditText mEditor;
@@ -44,12 +56,13 @@ public class UrlBarController implements View.OnFocusChangeListener {
         updateSecureIconVisibility();
     }
 
-    public void onPageLoadFinished() {
+    public void onPageLoadFinished(Context context, SslCertificate certificate) {
         mLoading = false;
         if (!mUrlBarHasFocus) {
             updateUrlBarText();
         }
         updateSecureIconVisibility();
+        updateSSLCertificateDialog(context, certificate);
     }
 
     public void onTitleReceived(String title) {
@@ -79,4 +92,59 @@ public class UrlBarController implements View.OnFocusChangeListener {
     private boolean isSecure() {
         return mUrl != null && mUrl.startsWith("https");
     }
+
+    private void updateSSLCertificateDialog(Context context, SslCertificate certificate) {
+        if (certificate == null) return;
+
+        // Show the dialog if you tap the lock icon and the cert is valid
+        mSecureIcon.setOnClickListener((v) -> {
+            View view = LayoutInflater.from(context).
+                    inflate(R.layout.dialog_ssl_certificate_info, new LinearLayout(context));
+
+            // Get the text views
+            TextView domainView = (TextView) view.findViewById(R.id.domain);
+            KeyValueView issuedToCNView = (KeyValueView) view.findViewById(R.id.issued_to_cn);
+            KeyValueView issuedToOView = (KeyValueView) view.findViewById(R.id.issued_to_o);
+            KeyValueView issuedToUNView = (KeyValueView) view.findViewById(R.id.issued_to_un);
+            KeyValueView issuedByCNView = (KeyValueView) view.findViewById(R.id.issued_by_cn);
+            KeyValueView issuedByOView = (KeyValueView) view.findViewById(R.id.issued_by_o);
+            KeyValueView issuedByUNView = (KeyValueView) view.findViewById(R.id.issued_by_un);
+            KeyValueView issuedOnView = (KeyValueView) view.findViewById(R.id.issued_on);
+            KeyValueView expiresOnView = (KeyValueView) view.findViewById(R.id.expires_on);
+
+            // Get the domain name
+            String domainString = Uri.parse(mUrl).getHost();
+
+            // Get the validity dates
+            Date startDate = certificate.getValidNotBeforeDate();
+            Date endDate = certificate.getValidNotAfterDate();
+
+            // Update TextViews
+            domainView.setText(domainString);
+            issuedToCNView.setText(R.string.ssl_cert_dialog_common_name,
+                    certificate.getIssuedTo().getCName());
+            issuedToOView.setText(R.string.ssl_cert_dialog_organization,
+                    certificate.getIssuedTo().getOName());
+            issuedToUNView.setText(R.string.ssl_cert_dialog_organizational_unit,
+                    certificate.getIssuedTo().getUName());
+            issuedByCNView.setText(R.string.ssl_cert_dialog_common_name,
+                    certificate.getIssuedBy().getCName());
+            issuedByOView.setText(R.string.ssl_cert_dialog_organization,
+                    certificate.getIssuedBy().getOName());
+            issuedByUNView.setText(R.string.ssl_cert_dialog_organizational_unit,
+                    certificate.getIssuedBy().getUName());
+            issuedOnView.setText(R.string.ssl_cert_dialog_issued_on,
+                    DateFormat.getDateTimeInstance().format(startDate));
+            expiresOnView.setText(R.string.ssl_cert_dialog_expires_on,
+                    DateFormat.getDateTimeInstance().format(endDate));
+
+            // Build and show the dialog
+            new AlertDialog.Builder(context)
+                    .setTitle(R.string.ssl_cert_dialog_title)
+                    .setView(view)
+                    .setNegativeButton(R.string.ssl_cert_dialog_dismiss, null)
+                    .create()
+                    .show();
+        });
+    }
 }
diff --git a/app/src/main/java/org/lineageos/jelly/webview/WebClient.java b/app/src/main/java/org/lineageos/jelly/webview/WebClient.java
index b477412..74969d4 100644
--- a/app/src/main/java/org/lineageos/jelly/webview/WebClient.java
+++ b/app/src/main/java/org/lineageos/jelly/webview/WebClient.java
@@ -67,7 +67,7 @@ class WebClient extends WebViewClient {
     @Override
     public void onPageFinished(WebView view, String url) {
         super.onPageFinished(view, url);
-        mUrlBarController.onPageLoadFinished();
+        mUrlBarController.onPageLoadFinished(view.getContext(), view.getCertificate());
     }
 
     @Override
diff --git a/app/src/main/res/layout/dialog_ssl_certificate_info.xml b/app/src/main/res/layout/dialog_ssl_certificate_info.xml
new file mode 100644
index 0000000..413a0c1
--- /dev/null
+++ b/app/src/main/res/layout/dialog_ssl_certificate_info.xml
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) 2017 The LineageOS Project
+
+     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.
+-->
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:paddingBottom="8dp"
+        android:paddingEnd="24dp"
+        android:paddingStart="24dp"
+        android:paddingTop="8dp">
+
+        <!-- Domain Name -->
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="8dp"
+            android:text="@string/ssl_cert_dialog_domain"
+            android:textAllCaps="true"
+            android:textStyle="bold" />
+
+        <TextView
+            android:id="@+id/domain"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:textColor="@color/colorAccent" />
+
+        <!-- Issued To -->
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:text="@string/ssl_cert_dialog_issued_to"
+            android:textAllCaps="true"
+            android:textStyle="bold" />
+
+        <org.lineageos.jelly.ui.KeyValueView
+            android:id="@+id/issued_to_cn"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="5dp" />
+
+        <org.lineageos.jelly.ui.KeyValueView
+            android:id="@+id/issued_to_o"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="5dp" />
+
+        <org.lineageos.jelly.ui.KeyValueView
+            android:id="@+id/issued_to_un"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="5dp" />
+
+        <!-- Issued By -->
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:text="@string/ssl_cert_dialog_issued_by"
+            android:textAllCaps="true"
+            android:textStyle="bold" />
+
+        <org.lineageos.jelly.ui.KeyValueView
+            android:id="@+id/issued_by_cn"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="5dp" />
+
+        <org.lineageos.jelly.ui.KeyValueView
+            android:id="@+id/issued_by_o"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="5dp" />
+
+        <org.lineageos.jelly.ui.KeyValueView
+            android:id="@+id/issued_by_un"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="5dp" />
+
+        <!-- Period of Validity -->
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="16dp"
+            android:text="@string/ssl_cert_dialog_validity"
+            android:textAllCaps="true"
+            android:textStyle="bold" />
+
+        <org.lineageos.jelly.ui.KeyValueView
+            android:id="@+id/issued_on"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="5dp" />
+
+        <org.lineageos.jelly.ui.KeyValueView
+            android:id="@+id/expires_on"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="5dp" />
+
+    </LinearLayout>
+</ScrollView>
\ No newline at end of file
diff --git a/app/src/main/res/layout/key_value_view.xml b/app/src/main/res/layout/key_value_view.xml
new file mode 100644
index 0000000..6a8ba62
--- /dev/null
+++ b/app/src/main/res/layout/key_value_view.xml
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (c) 2017 The LineageOS Project
+
+     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.
+-->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <TextView
+        android:id="@+id/key"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content" />
+
+    <TextView
+        android:id="@+id/value"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textColor="@color/colorAccent" />
+
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 00f273f..f8b2198 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -174,4 +174,17 @@
 
     <!-- Search in page: search hint -->
     <string name="search_bar_hint">Search</string>
+
+    <!-- SSL Certificate Details dialog -->
+    <string name="ssl_cert_dialog_title">SSL Certificate Details</string>
+    <string name="ssl_cert_dialog_domain">Domain</string>
+    <string name="ssl_cert_dialog_issued_to">Issued to</string>
+    <string name="ssl_cert_dialog_issued_by">Issued by</string>
+    <string name="ssl_cert_dialog_validity">Validity Period</string>
+    <string name="ssl_cert_dialog_common_name">Common Name (CN)</string>
+    <string name="ssl_cert_dialog_organization">Organization (O)</string>
+    <string name="ssl_cert_dialog_organizational_unit">Organizational Unit (UN)</string>
+    <string name="ssl_cert_dialog_issued_on">Issued On</string>
+    <string name="ssl_cert_dialog_expires_on">Expires On</string>
+    <string name="ssl_cert_dialog_dismiss">Dismiss</string>
 </resources>