Add example android app able to make GetEntry requests

.bazelrc

@@ -0,0 +1,5 @@
+# Optional: GOPATH and ANDROID_HOME need to be passed to the bazel build command. 
+# To avoid typing them in the command line, please edit and uncomment the following lines.
+# build --action_env=ANDROID_HOME=/Your/Android/Home/Path # example:/Users/YourUserName/Library/Android/sdk
+# build --action_env=GOPATH=/Your/Go/Path/ # example: /Users/YourUserName/go
+

.gitignore

@@ -20,3 +20,17 @@
 
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
+
+# AndroidStudio files
+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+
+# Bazel output files
+bazel-*

CONTRIBUTORS

@@ -9,3 +9,4 @@
 # Names should be added to this file as:
 #     Name <email address>
 
+Antonio Marcedone <a.marcedone@gmail.com>

WORKSPACE

@@ -0,0 +1,6 @@
+android_sdk_repository(
+    name = "androidsdk",
+    path = "/Users/antonio.marcedone/Library/Android/sdk",
+    api_level = 25,
+    build_tools_version = "25.0.0"
+)

exampleapp/BUILD

@@ -0,0 +1,13 @@
+android_binary(
+    name = "exampleapp",
+    srcs = ["src/main/java/com/google/keytransparency/exampleapp/KeyTransparencyExample.java"],    
+    custom_package = "com.google.keytransparency.exampleapp",
+    manifest = "src/main/AndroidManifest.xml",
+    resource_files = glob(["src/main/res/**"]),
+    deps = [
+	"//keytransparency:keytransparency",
+	"@androidsdk//com.android.support:appcompat-v7-25.0.0",
+	"@androidsdk//com.android.support.constraint:constraint-layout-1.0.2",
+	"@androidsdk//com.android.support:design-25.0.0",
+	],
+)

exampleapp/src/main/AndroidManifest.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.google.keytransparency.exampleapp">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".KeyTransparencyExample">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+    <uses-sdk android:minSdkVersion="16"/>
+
+</manifest>

exampleapp/src/main/java/com/google/keytransparency/exampleapp/KeyTransparencyExample.java

@@ -0,0 +1,68 @@
+package com.google.keytransparency.exampleapp;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.text.method.ScrollingMovementMethod;
+import android.widget.TextView;
+
+import com.google.keytransparency.KTClient;
+import com.google.keytransparency.KeyTransparencyException;
+
+import java.io.IOException;
+
+public class KeyTransparencyExample extends AppCompatActivity {
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_key_transparency_example);
+        TextView tv = (TextView) findViewById(R.id.textView);
+
+        tv.setText("");
+        tv.setMovementMethod(new ScrollingMovementMethod());
+
+        try{
+            tv.append("\n\n --- GetEntry test --- \n");
+
+            KTClient client = KTClient.getClient(1000);
+            client.setTextViewForLogs(tv);
+            String ktUrl = "35.184.134.53:8080";
+            client.addKtServer(ktUrl, true, null, null);
+
+            try {
+                String username = "gary.belvin@gmail.com";
+
+                tv.append("\nTrying to get public key for " + username + " from server " + ktUrl +"\n");
+                byte[] entry = client.getEntry(ktUrl, username,"app1");
+                if (entry==null){
+                    tv.append("Received key is null: entry does not exists");
+                } else {
+                    tv.append("Received key: " + new String(entry, "UTF-8"));
+                }
+
+                username = "NOT_A_USER@gmail.com";
+                tv.append("\n\nTrying to get public key for " + username + " from server " + ktUrl +"\n");
+                entry = client.getEntry(ktUrl, username,"app1");
+                if (entry==null){
+                    tv.append("Received key is null: entry does not exists");
+                } else {
+                    tv.append("Received key: " + new String(entry, "UTF-8"));
+                }
+
+
+            } catch (KeyTransparencyException e) {
+                tv.append("Exception was raised: " + e);
+            }
+
+        } catch (IOException e) {
+            e.printStackTrace();
+            tv.append("\nError reading one of the public keys: "+e.getMessage());
+            throw new RuntimeException("Error reading one of the public keys: "+e.getMessage(),e );
+        } catch (KeyTransparencyException e) {
+            e.printStackTrace();
+            tv.append("\nError creating the client: "+e.getMessage());
+            throw new RuntimeException("Error creating the client: "+e.getMessage(),e );
+        }
+    }
+
+}

exampleapp/src/main/res/layout/activity_key_transparency_example.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingLeft="16dp"
+    android:paddingRight="16dp"
+    android:orientation="horizontal"
+    android:gravity="center">
+
+
+    <TextView
+        android:id="@+id/textView"
+        android:scrollbars = "vertical"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:text=""
+    />
+
+
+</LinearLayout>

exampleapp/src/main/res/raw/p256_pubkey.pem

@@ -0,0 +1,4 @@
+-----BEGIN PUBLIC KEY-----
+MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEKv9XdfRJkfSF16zbMfr1hCKQsFcF
+rZtX5urHF9ZDuOaR5xrCwd4Ji6dGxV2xNT87mi8kVAGQ/4q68QGt8rZ9Fw==
+-----END PUBLIC KEY-----

exampleapp/src/main/res/raw/server.crt

@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

exampleapp/src/main/res/raw/trillian_log.pem

@@ -0,0 +1,3 @@
+-----BEGIN PUBLIC KEY-----
+MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEfzsONlxOpdPmNMtxsAahUGLgrwX+OSJDjTkLTgl3JaztUQnTpVh10DjYoaDhiJNiZqmKOPkxveVoPJ5Jr/Ex0Q==
+-----END PUBLIC KEY-----

exampleapp/src/main/res/raw/vrf_pubkey.pem

@@ -0,0 +1,4 @@
+-----BEGIN PUBLIC KEY-----
+MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAENZuDzGYmrJuoG7EkD0O2OEasXxoO
+JA4HLQexWcF8MDgmlh27xS/Zwv20DNha8iBT26h2xNDo7exwVzL6+IBB2Q==
+-----END PUBLIC KEY-----

exampleapp/src/main/res/values/colors.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#FF4081</color>
+</resources>

exampleapp/src/main/res/values/dimens.xml

@@ -0,0 +1 @@
+<resources></resources>

exampleapp/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">KeyTransparencyAndroid</string>
+</resources>

exampleapp/src/main/res/values/styles.xml

@@ -0,0 +1,20 @@
+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+
+    <style name="AppTheme.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+
+    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
+
+    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
+
+</resources>

keytransparency/BUILD

@@ -0,0 +1,28 @@
+android_library(
+  name = "keytransparency",
+  visibility = ["//visibility:public"],
+  srcs = ["src/main/java/com/google/keytransparency/KeyTransparencyException.java",
+          "src/main/java/com/google/keytransparency/KTClient.java"],
+  custom_package = "com.google.keytransparency",
+  manifest = "src/main/AndroidManifest.xml",
+  resource_files = glob(["src/main/res/**"]),
+  deps = [":gobind_keytransparency_android"],
+)
+
+aar_import(
+        name = "gobind_keytransparency_android",
+        aar = "keytransparency_gobind.aar",
+    )
+
+genrule(
+    name = "gobind_keytransparency_android_gen_aar",
+    srcs = [
+       # "//some:files",  # a filegroup with multiple files in it ==> $(locations)
+       # "//other:gen",   # a genrule with a single output ==> $(location)
+    ],
+    outs = ["keytransparency_gobind.aar"],
+    tags=["local"],
+    cmd = "gomobile bind -target android -o $@ -javapkg com.google.keytransparency.gobind github.com/google/keytransparency/core/client/gobindClient", # github.com/google/keytransparency/core/client/kt github.com/google/keytransparency/core/crypto/commitments",
+)
+
+

keytransparency/src/main/AndroidManifest.xml

@@ -0,0 +1,12 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+
+    package="com.google.keytransparency">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+
+    <application android:allowBackup="true" android:label="@string/app_name"
+        android:supportsRtl="true">
+
+    </application>
+
+</manifest>

keytransparency/src/main/java/com/google/keytransparency/KTClient.java

@@ -0,0 +1,77 @@
+package com.google.keytransparency;
+
+import android.content.Context;
+import android.util.Log;
+import android.widget.TextView;
+
+import com.google.keytransparency.gobind.gobindClient.GobindClient;
+import com.google.keytransparency.gobind.gobindClient.BWriter;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+
+public class KTClient {
+    private static final String TAG_LOGS_FROM_GOBIND = "KTGo:";
+
+    private static KTClient client;
+
+    // TODO remove me
+    TextView tv;
+    public void setTextViewForLogs(TextView tv) {
+        this.tv = tv;
+    }
+
+
+    private KTClient(int timeoutInMs){
+        try {
+            GobindClient.bInit(timeoutInMs);
+            GobindClient.bSetCustomLogger(new WriterForGoLogs());
+        }catch (Exception e) {
+            // This should never happen actually. We are enforcing init can be called only once,
+            // and so far the only error comes from calling init twice.
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static KTClient getClient(int timeoutInMs){
+        if (client == null) {
+            client = new KTClient(timeoutInMs);
+        }
+        return client;
+    }
+
+    public void addKtServer(String ktUrl, boolean insecureTLS, byte[] ktTlsCertPem, byte[] domainInfoHash) throws KeyTransparencyException {
+        try {
+            GobindClient.bAddKtServer(ktUrl, insecureTLS, ktTlsCertPem, domainInfoHash);
+        } catch (Exception e) {
+            throw new KeyTransparencyException(e);
+        }
+    }
+
+    public byte[] getEntry(String ktUrl, String userName, String appName) throws KeyTransparencyException {
+        try {
+            // TODO(amarcedone): do we want to store the latest smr so that it can be used for consistency of new requests?
+            return GobindClient.bGetEntry(ktUrl, userName, appName);
+        } catch (Exception e) {
+            throw new KeyTransparencyException(e);
+        }
+    }
+
+    private class WriterForGoLogs implements BWriter {
+        @Override
+        public long write(byte[] bytes) throws Exception {
+            // TODO(amarcedone): confirm utf-8 is the correct encoding here, as well as loglevel (i).
+            Log.i(TAG_LOGS_FROM_GOBIND, new String(bytes, "UTF-8"));
+
+            // TODO REMOVE ME.
+            if(tv != null){
+                tv.append(TAG_LOGS_FROM_GOBIND + new String(bytes, "UTF-8"));
+            }
+
+            return bytes.length;
+        }
+    }
+
+}

keytransparency/src/main/java/com/google/keytransparency/KeyTransparencyException.java

@@ -0,0 +1,10 @@
+package com.google.keytransparency;
+
+/**
+ * A KeyTransparencyException is thrown whenever the go native code throws an Exception.
+ */
+public class KeyTransparencyException extends Throwable {
+    public KeyTransparencyException(Exception e) {
+        super(e);
+    }
+}

keytransparency/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">keytransparency</string>
+</resources>