Updater: Android Studio support

See README-STUDIO.txt for more info.

Change-Id: Ie673bba5618b0f00a585049cd85687a64db2b420

.gitignore

@@ -0,0 +1,13 @@
+*.iml
+.gradle
+/local.properties
+.idea
+.DS_Store
+/build
+/captures
+/gradle
+/gradlew
+/gradlew.bat
+/system_libs/*.jar
+/keystore.properties
+*.jks

Android.mk

@@ -35,3 +35,24 @@ LOCAL_PRIVILEGED_MODULE := true
 LOCAL_PROGUARD_FLAG_FILES := proguard.flags
 
 include $(BUILD_PACKAGE)
+
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := UpdaterStudio
+LOCAL_MODULE_CLASS := FAKE
+LOCAL_MODULE_SUFFIX := -timestamp
+updater_system_deps := $(call java-lib-deps,framework)
+updater_system_libs_path := $(abspath $(LOCAL_PATH))/system_libs
+
+include $(BUILD_SYSTEM)/base_rules.mk
+
+.PHONY: copy_updater_system_deps
+copy_updater_system_deps: $(updater_system_deps)
+	$(hide) mkdir -p $(updater_system_libs_path)
+	$(hide) rm -rf $(updater_system_libs_path)/*.jar
+	$(hide) cp $(updater_system_deps) $(updater_system_libs_path)/framework.jar
+
+$(LOCAL_BUILT_MODULE): copy_updater_system_deps
+	$(hide) echo "Fake: $@"
+	$(hide) mkdir -p $(dir $@)
+	$(hide) touch $@

README-STUDIO.txt

@@ -0,0 +1,14 @@
+How to build with Android Studio
+================================
+
+Updater needs access to the system API, therefore it can't be built only using
+the public SDK. You first need to generate the libraries with all the needed
+classes. The application also needs elevated privileges, so you need to sign
+it with the right key to update the one in the system partition. To do this:
+
+ - Generate a keystore and keystore.properties using gen-keystore.sh
+ - Build the dependencies running 'make UpdaterStudio'. This command will add
+   the needed libraries in system_libraries/.
+
+You need to do the above once, unless Android Studio can't find some symbol.
+In this case, rebuild the system libraries with 'make UpdaterStudio'.

build.gradle

@@ -0,0 +1,70 @@
+repositories {
+    google()
+    jcenter()
+}
+
+buildscript {
+    repositories {
+        google()
+        jcenter()
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.0.1'
+    }
+}
+
+def keystorePropertiesFile = rootProject.file("keystore.properties")
+def keystoreProperties = new Properties()
+keystoreProperties.load(new FileInputStream(keystorePropertiesFile))
+
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 24
+    buildToolsVersion '26.0.3'
+
+    defaultConfig {
+        minSdkVersion 24
+        targetSdkVersion 24
+    }
+
+    lintOptions {
+        ignore 'ProtectedPermissions'
+        // These depend on translations
+        ignore 'ExtraTranslation', 'ImpliedQuantity', 'MissingQuantity', 'MissingTranslation'
+    }
+
+    sourceSets {
+        main {
+            res.srcDirs = ['res']
+            java.srcDirs = ['src']
+            manifest.srcFile 'AndroidManifest.xml'
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    signingConfigs {
+        debug {
+            keyAlias keystoreProperties['keyAlias']
+            keyPassword keystoreProperties['keyPassword']
+            storeFile file(keystoreProperties['storeFile'])
+            storePassword keystoreProperties['storePassword']
+        }
+    }
+}
+
+dependencies {
+    compileOnly fileTree(dir: 'system_libs/', include: ['*.jar'])
+
+    def supportLibVersion = "24.2.1"
+    implementation "com.android.support:appcompat-v7:${supportLibVersion}"
+    implementation "com.android.support:cardview-v7:${supportLibVersion}"
+    implementation "com.android.support:design:${supportLibVersion}"
+    implementation "com.android.support:preference-v7:${supportLibVersion}"
+    implementation "com.android.support:recyclerview-v7:${supportLibVersion}"
+}

gen-keystore.sh

@@ -0,0 +1,67 @@
+#!/bin/sh
+
+if [ $# -ne 6 ]; then
+    echo "Usage: `basename $0` PRIVATE_KEY CERTIFICATE \\"
+    echo "          KEYSTORE_PASSWRD KEY_PASSWORD KEY_ALIAS \\"
+    echo "          OUTPUT_KEYSTORE_PATH"
+    echo
+    echo "Example:"
+    echo "  `basename $0` \\"
+    echo "          ../../../build/target/product/security/testkey.pk8 \\"
+    echo "          ../../../build/target/product/security/testkey.x509.pem \\"
+    echo "          keystore-password key-password android testkey.jks"
+    exit 0
+fi
+
+PRIVATE_KEY="$1"
+CERTIFICATE="$2"
+KEYSTORE_PASSWORD="$3"
+KEY_PASSWORD="$4"
+KEY_ALIAS="$5"
+KEYSTORE_PATH="$6"
+
+if [ -f "$KEYSTORE_PATH" ]; then
+    echo "$KEYSTORE_PATH already exists"
+    exit 1
+fi
+
+tmpdir=`mktemp -d`
+trap 'rm -rf $tmpdir;' 0
+
+key="$tmpdir/platform.key"
+pk12="$tmpdir/platform.pk12"
+openssl pkcs8 -in "$PRIVATE_KEY" -inform DER -outform PEM -nocrypt -out "$key"
+if [ $? -ne 0 ]; then
+    exit 1
+fi
+openssl pkcs12 -export -in "$CERTIFICATE" -inkey "$key" -name "$KEY_ALIAS" \
+    -out "$pk12" -password pass:"$KEY_PASSWORD"
+if [ $? -ne 0 ]; then
+    exit 1
+fi
+
+keytool -importkeystore \
+    -srckeystore "$pk12" -srcstoretype pkcs12 -srcstorepass "$KEY_PASSWORD" \
+    -destkeystore "$KEYSTORE_PATH" -deststorepass "$KEYSTORE_PASSWORD" \
+    -destkeypass "$KEY_PASSWORD"
+if [ $? -ne 0 ]; then
+    exit 1
+fi
+
+
+echo
+echo "Generating keystore.properties..."
+if [ -f keystore.properties ]; then
+    echo "keystore.properties already exists, overwrite it? [Y/n]"
+    read reply
+    if [ "$reply" = "n" -o "$reply" = "N" ]; then
+        exit 0
+    fi
+fi
+
+cat > keystore.properties <<EOF
+keyAlias=$KEY_ALIAS
+keyPassword=$KEY_PASSWORD
+storeFile=$KEYSTORE_PATH
+storePassword=$KEYSTORE_PASSWORD
+EOF

keystore.properties.sample

@@ -0,0 +1,4 @@
+keyAlias=android
+keyPassword=android
+storeFile=testkey.jks
+storePassword=android