Introduce "blocked phone number" provider

Bug 26232372
Change-Id: I735d2949f45f533c26063d413dd3dfb72f455711

14 files changed, 1317 insertions, 0 deletions

diff --git a/Android.mk b/Android.mk
new file mode 100644
index 0000000..3b3aa45
--- /dev/null
+++ b/Android.mk
@@ -0,0 +1,20 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE_TAGS := optional
+
+# Only compile source java files in this apk.
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+
+LOCAL_STATIC_JAVA_LIBRARIES += android-common guava
+
+LOCAL_EMMA_COVERAGE_FILTER := +com.android.providers.blockednumber.*
+
+LOCAL_PACKAGE_NAME := BlockedNumberProvider
+LOCAL_CERTIFICATE := shared
+LOCAL_PRIVILEGED_MODULE := true
+
+include $(BUILD_PACKAGE)
+
+# Use the following include to make our test apk.
+include $(call all-makefiles-under,$(LOCAL_PATH))
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
new file mode 100644
index 0000000..d9bd2c9
--- /dev/null
+++ b/AndroidManifest.xml
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2016 The Android Open Source 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.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+        package="com.android.providers.blockednumber"
+        android:sharedUserId="android.uid.shared">
+
+<!--
+    TODO: Make it DE. Add the following to <application>.  See go/android-fbe-apis
+        android:encryptionAware=”true”
+        android:forceDeviceEncrypted=”true”
+-->
+
+    <application
+        android:process="android.process.acore"
+        android:label="@string/app_label"
+        android:allowBackup="false"
+        android:usesCleartextTraffic="false">
+
+        <provider android:name="BlockedNumberProvider"
+            android:authorities="com.android.blockednumber"
+            android:multiprocess="false"
+            android:exported="true">
+        </provider>
+    </application>
+</manifest>
diff --git a/CleanSpec.mk b/CleanSpec.mk
new file mode 100644
index 0000000..c087cb8
--- /dev/null
+++ b/CleanSpec.mk
@@ -0,0 +1,49 @@
+# Copyright (C) 2016 The Android Open Source 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.
+#
+
+# If you don't need to do a full clean build but would like to touch
+# a file or delete some intermediate files, add a clean step to the end
+# of the list.  These steps will only be run once, if they haven't been
+# run before.
+#
+# E.g.:
+#     $(call add-clean-step, touch -c external/sqlite/sqlite3.h)
+#     $(call add-clean-step, rm -rf $(PRODUCT_OUT)/obj/STATIC_LIBRARIES/libz_intermediates)
+#
+# Always use "touch -c" and "rm -f" or "rm -rf" to gracefully deal with
+# files that are missing or have been moved.
+#
+# Use $(PRODUCT_OUT) to get to the "out/target/product/blah/" directory.
+# Use $(OUT_DIR) to refer to the "out" directory.
+#
+# If you need to re-do something that's already mentioned, just copy
+# the command and add it to the bottom of the list.  E.g., if a change
+# that you made last week required touching a file and a change you
+# made today requires touching the same file, just copy the old
+# touch step and add it to the end of the list.
+#
+# ************************************************
+# NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
+# ************************************************
+
+# For example:
+#$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/APPS/AndroidTests_intermediates)
+#$(call add-clean-step, rm -rf $(OUT_DIR)/target/common/obj/JAVA_LIBRARIES/core_intermediates)
+#$(call add-clean-step, find $(OUT_DIR) -type f -name "IGTalkSession*" -print0 | xargs -0 rm -f)
+#$(call add-clean-step, rm -rf $(PRODUCT_OUT)/data/*)
+
+# ************************************************
+# NEWER CLEAN STEPS MUST BE AT THE END OF THE LIST
+# ************************************************
diff --git a/MODULE_LICENSE_APACHE2 b/MODULE_LICENSE_APACHE2
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/MODULE_LICENSE_APACHE2
diff --git a/NOTICE b/NOTICE
new file mode 100644
index 0000000..b456062
--- /dev/null
+++ b/NOTICE
@@ -0,0 +1,190 @@
+
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diff --git a/res/values/strings.xml b/res/values/strings.xml
new file mode 100644
index 0000000..860e115
--- /dev/null
+++ b/res/values/strings.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Copyright (C) 2016 The Android Open Source 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.
+-->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+           xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <!-- This is the label for the application that stores blocked phone numbers [CHAR LIMIT=NONE] -->
+    <string name="app_label">Blocked Numbers Storage</string>
+
+    <!-- This is the label for the provider that stores blocked phone numbers [CHAR LIMIT=NONE] -->
+    <string name="provider_label">Blocked Numbers</string>
+
+</resources>
diff --git a/src/com/android/providers/blockednumber/BlockedNumberDatabaseHelper.java b/src/com/android/providers/blockednumber/BlockedNumberDatabaseHelper.java
new file mode 100644
index 0000000..f3138fa
--- /dev/null
+++ b/src/com/android/providers/blockednumber/BlockedNumberDatabaseHelper.java
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2016 The Android Open Source 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 com.android.providers.blockednumber;
+
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.provider.BlockedNumberContract.BlockedNumbers;
+
+import com.android.internal.annotations.VisibleForTesting;
+
+public class BlockedNumberDatabaseHelper {
+    private static final String TAG = BlockedNumberProvider.TAG;
+
+    private static final int DATABASE_VERSION = 1;
+
+    private static final String DATABASE_NAME = "blockednumbers.db";
+
+    private static BlockedNumberDatabaseHelper sInstance;
+
+    private final Context mContext;
+
+    private final OpenHelper mOpenHelper;
+
+    public interface Tables {
+        String BLOCKED_NUMBERS = "blocked";
+    }
+
+    private static final class OpenHelper extends SQLiteOpenHelper {
+        public OpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory,
+                          int version) {
+            super(context, name, factory, version);
+        }
+
+        @Override
+        public void onCreate(SQLiteDatabase db) {
+            db.execSQL("CREATE TABLE " + Tables.BLOCKED_NUMBERS + " (" +
+                    BlockedNumbers.COLUMN_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," +
+                    BlockedNumbers.COLUMN_ORIGINAL_NUMBER + " TEXT NOT NULL UNIQUE," +
+                    BlockedNumbers.COLUMN_STRIPPED_NUMBER + " TEXT NOT NULL," +
+                    BlockedNumbers.COLUMN_E164_NUMBER + " TEXT" +
+                    ")");
+
+            db.execSQL("CREATE INDEX blocked_number_idx_stripped ON " + Tables.BLOCKED_NUMBERS +
+                    " (" + BlockedNumbers.COLUMN_STRIPPED_NUMBER + ");");
+            db.execSQL("CREATE INDEX blocked_number_idx_e164 ON " + Tables.BLOCKED_NUMBERS + " (" +
+                    BlockedNumbers.COLUMN_E164_NUMBER +
+                    ");");
+        }
+
+        @Override
+        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+        }
+    }
+
+    @VisibleForTesting
+    public static BlockedNumberDatabaseHelper newInstanceForTest(Context context) {
+        return new BlockedNumberDatabaseHelper(context, /* instanceIsForTesting =*/ true);
+    }
+
+    private BlockedNumberDatabaseHelper(Context context, boolean instanceIsForTesting) {
+        mContext = context;
+        mOpenHelper = new OpenHelper(mContext,
+                instanceIsForTesting ? null : DATABASE_NAME, null, DATABASE_VERSION);
+    }
+
+    public static synchronized BlockedNumberDatabaseHelper getInstance(Context context) {
+        if (sInstance == null) {
+            sInstance = new BlockedNumberDatabaseHelper(context.getApplicationContext(),
+                    /* instanceIsForTesting =*/ false);
+        }
+        return sInstance;
+    }
+
+    public SQLiteDatabase getReadableDatabase() {
+        return mOpenHelper.getReadableDatabase();
+    }
+
+    public SQLiteDatabase getWritableDatabase() {
+        return mOpenHelper.getWritableDatabase();
+    }
+
+    public void wipeForTest() {
+        getWritableDatabase().execSQL("DELETE FROM " + Tables.BLOCKED_NUMBERS);
+    }
+}
diff --git a/src/com/android/providers/blockednumber/BlockedNumberProvider.java b/src/com/android/providers/blockednumber/BlockedNumberProvider.java
new file mode 100644
index 0000000..13e977c
--- /dev/null
+++ b/src/com/android/providers/blockednumber/BlockedNumberProvider.java
@@ -0,0 +1,392 @@
+/*
+ * Copyright (C) 2016 The Android Open Source 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 com.android.providers.blockednumber;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.app.AppOpsManager;
+import android.content.*;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteQueryBuilder;
+import android.net.Uri;
+import android.os.*;
+import android.os.Process;
+import android.provider.BlockedNumberContract;
+import android.telecom.TelecomManager;
+import android.text.TextUtils;
+import android.util.Log;
+import com.android.common.content.ProjectionMap;
+import com.android.providers.blockednumber.BlockedNumberDatabaseHelper.Tables;
+
+/**
+ * Blocked phone number provider.
+ *
+ * <p>Note the provider allows emergency numbers.  The caller (telecom) should never call it with
+ * emergency numbers.
+ */
+public class BlockedNumberProvider extends ContentProvider {
+    static final String TAG = "BlockedNumbers";
+
+    private static final boolean DEBUG = true; // DO NOT SUBMIT WITH TRUE.
+
+    private static final int BLOCKED_LIST = 1000;
+    private static final int BLOCKED_ID = 1001;
+
+    private static final UriMatcher sUriMatcher;
+
+    static {
+        sUriMatcher = new UriMatcher(0);
+        sUriMatcher.addURI(BlockedNumberContract.AUTHORITY, "blocked", BLOCKED_LIST);
+        sUriMatcher.addURI(BlockedNumberContract.AUTHORITY, "blocked/#", BLOCKED_ID);
+    }
+
+    private static final ProjectionMap sBlockedNumberColumns = ProjectionMap.builder()
+            .add(BlockedNumberContract.BlockedNumbers.COLUMN_ID)
+            .add(BlockedNumberContract.BlockedNumbers.COLUMN_ORIGINAL_NUMBER)
+            .add(BlockedNumberContract.BlockedNumbers.COLUMN_STRIPPED_NUMBER)
+            .add(BlockedNumberContract.BlockedNumbers.COLUMN_E164_NUMBER)
+            .build();
+
+    private static final String ID_SELECTION =
+            BlockedNumberContract.BlockedNumbers.COLUMN_ID + "=?";
+
+    @Override
+    public boolean onCreate() {
+        return true;
+    }
+
+    BlockedNumberDatabaseHelper getDbHelper() {
+        return BlockedNumberDatabaseHelper.getInstance(getContext());
+    }
+
+    /**
+     * TODO CTS:
+     * - BLOCKED_LIST
+     * - BLOCKED_ID
+     * - Other random URLs should fail
+     */
+    @Override
+    public String getType(@NonNull Uri uri) {
+        final int match = sUriMatcher.match(uri);
+        switch (match) {
+            case BLOCKED_LIST:
+                return BlockedNumberContract.BlockedNumbers.CONTENT_TYPE;
+            case BLOCKED_ID:
+                return BlockedNumberContract.BlockedNumbers.CONTENT_ITEM_TYPE;
+            default:
+                throw new IllegalArgumentException("Unsupported URI: " + uri);
+        }
+    }
+
+    /**
+     * TODO CTS:
+     * - BLOCKED_LIST
+     *   With no columns should fail
+     *   With COLUMN_INDEX_ORIGINAL only
+     *   With COLUMN_INDEX_E164 only should fail
+     *   With COLUMN_INDEX_ORIGINAL + COLUMN_INDEX_E164
+     *   With with throwIfSpecified columns, should fail.
+     *
+     * - BLOCKED_ID should fail
+     * - Other random URLs should fail
+     */
+    @Override
+    public Uri insert(@NonNull Uri uri, @Nullable ContentValues values) {
+        enforceWritePermission();
+
+        final int match = sUriMatcher.match(uri);
+        switch (match) {
+            case BLOCKED_LIST:
+                return insertBlockedNumber(values);
+            default:
+                throw new IllegalArgumentException("Unsupported URI: " + uri);
+        }
+    }
+
+    /**
+     * Implements the "blocked/" insert.
+     */
+    private Uri insertBlockedNumber(ContentValues cv) {
+        throwIfSpecified(cv, BlockedNumberContract.BlockedNumbers.COLUMN_ID);
+        throwIfSpecified(cv, BlockedNumberContract.BlockedNumbers.COLUMN_STRIPPED_NUMBER);
+
+        final String phoneNumber = cv.getAsString(
+                BlockedNumberContract.BlockedNumbers.COLUMN_ORIGINAL_NUMBER);
+
+        if (TextUtils.isEmpty(phoneNumber)) {
+            throw new IllegalArgumentException("Missing a required column " +
+                    BlockedNumberContract.BlockedNumbers.COLUMN_ORIGINAL_NUMBER);
+        }
+
+        // Sanitize the input and fill in with autogenerated columns.
+        final String strippedNumber = Utils.stripPhoneNumber(phoneNumber);
+        final String e164Number = Utils.getE164Number(getContext(), strippedNumber,
+                cv.getAsString(BlockedNumberContract.BlockedNumbers.COLUMN_E164_NUMBER));
+
+        cv.put(BlockedNumberContract.BlockedNumbers.COLUMN_STRIPPED_NUMBER, strippedNumber);
+        cv.put(BlockedNumberContract.BlockedNumbers.COLUMN_E164_NUMBER, e164Number);
+
+        // Then insert.
+        final long id = getDbHelper().getWritableDatabase().insertOrThrow(
+                BlockedNumberDatabaseHelper.Tables.BLOCKED_NUMBERS, null, cv);
+
+        return ContentUris.withAppendedId(BlockedNumberContract.BlockedNumbers.CONTENT_URI, id);
+    }
+
+    private static void throwIfSpecified(ContentValues cv, String column) {
+        if (cv.containsKey(column)) {
+            throw new IllegalArgumentException("Column " + column + " must not be specified");
+        }
+    }
+
+    /**
+     * TODO CTS:
+     * - Any call should fail
+     */
+    @Override
+    public int update(@NonNull Uri uri, @Nullable ContentValues values, @Nullable String selection,
+            @Nullable String[] selectionArgs) {
+        throw new UnsupportedOperationException(
+                "Update is not supported.  Use delete + insert instead");
+    }
+
+    /**
+     * TODO CTS:
+     * - BLOCKED_LIST, with selection and without.
+     * - BLOCKED_ID , with selection and without.  With should fail.
+     */
+    @Override
+    public int delete(@NonNull Uri uri, @Nullable String selection,
+            @Nullable String[] selectionArgs) {
+        enforceWritePermission();
+
+        final int match = sUriMatcher.match(uri);
+        switch (match) {
+            case BLOCKED_LIST:
+                return deleteBlockedNumber(selection, selectionArgs);
+            case BLOCKED_ID:
+                return deleteBlockedNumberWithId(ContentUris.parseId(uri), selection);
+            default:
+                throw new IllegalArgumentException("Unsupported URI: " + uri);
+        }
+    }
+
+    /**
+     * Implements the "blocked/#" delete.
+     */
+    private int deleteBlockedNumberWithId(long id, String selection) {
+        throwForNonEmptySelection(selection);
+
+        return deleteBlockedNumber(ID_SELECTION, new String[]{Long.toString(id)});
+    }
+
+    /**
+     * Implements the "blocked/" delete.
+     */
+    private int deleteBlockedNumber(String selection, String[] selectionArgs) {
+        final SQLiteDatabase db = getDbHelper().getWritableDatabase();
+
+        // When selection is specified, compile it within (...) to detect SQL injection.
+        if (!TextUtils.isEmpty(selection)) {
+            db.validateSql("select 1 FROM " + Tables.BLOCKED_NUMBERS + " WHERE " +
+                    Utils.wrapSelectionWithParens(selection),
+                    /* cancellationSignal =*/ null);
+        }
+
+        return getDbHelper().getWritableDatabase().delete(
+                BlockedNumberDatabaseHelper.Tables.BLOCKED_NUMBERS,
+                selection, selectionArgs);
+    }
+
+    @Override
+    public Cursor query(@NonNull Uri uri, @Nullable String[] projection, @Nullable String selection,
+            @Nullable String[] selectionArgs, @Nullable String sortOrder) {
+        enforceReadPermission();
+
+        return query(uri, projection, selection, selectionArgs, sortOrder, null);
+    }
+
+    @Override
+    public Cursor query(@NonNull Uri uri, @Nullable String[] projection, @Nullable String selection,
+            @Nullable String[] selectionArgs, @Nullable String sortOrder,
+            @Nullable CancellationSignal cancellationSignal) {
+        enforceReadPermission();
+
+        final int match = sUriMatcher.match(uri);
+        switch (match) {
+            case BLOCKED_LIST:
+                return queryBlockedList(projection, selection, selectionArgs, sortOrder,
+                        cancellationSignal);
+            case BLOCKED_ID:
+                return queryBlockedListWithId(ContentUris.parseId(uri), projection, selection,
+                        cancellationSignal);
+            default:
+                throw new IllegalArgumentException("Unsupported URI: " + uri);
+        }
+    }
+
+    /**
+     * Implements the "blocked/#" query.
+     */
+    private Cursor queryBlockedListWithId(long id, String[] projection, String selection,
+            CancellationSignal cancellationSignal) {
+        throwForNonEmptySelection(selection);
+
+        return queryBlockedList(projection, ID_SELECTION, new String[]{Long.toString(id)},
+                null, cancellationSignal);
+    }
+
+    /**
+     * Implements the "blocked/" query.
+     */
+    private Cursor queryBlockedList(String[] projection, String selection, String[] selectionArgs,
+            String sortOrder, CancellationSignal cancellationSignal) {
+        SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
+        qb.setStrict(true);
+        qb.setTables(BlockedNumberDatabaseHelper.Tables.BLOCKED_NUMBERS);
+        qb.setProjectionMap(sBlockedNumberColumns);
+
+        return qb.query(getDbHelper().getReadableDatabase(), projection, selection, selectionArgs,
+                /* groupBy =*/ null, /* having =*/null, sortOrder,
+                /* limit =*/ null, cancellationSignal);
+    }
+
+    private void throwForNonEmptySelection(String selection) {
+        if (!TextUtils.isEmpty(selection)) {
+            throw new IllegalArgumentException(
+                    "When ID is specified in URI, selection must be null");
+        }
+    }
+
+    /**
+     * TODO CTS:
+     * - METHOD_IS_BLOCKED with various matching / non-matching arguments.
+     *
+     * - other random methods should fail
+     */
+    @Override
+    public Bundle call(@NonNull String method, @Nullable String arg, @Nullable Bundle extras) {
+        enforceReadPermission();
+
+        final Bundle res = new Bundle();
+        switch (method) {
+            case BlockedNumberContract.METHOD_IS_BLOCKED:
+                res.putBoolean(BlockedNumberContract.RES_NUMBER_IS_BLOCKED, isBlocked(arg));
+                break;
+            default:
+                throw new IllegalArgumentException("Unsupported method " + method);
+        }
+        return res;
+    }
+
+    private boolean isBlocked(String phoneNumber) {
+        final String inStripped = Utils.stripPhoneNumber(phoneNumber);
+        if (TextUtils.isEmpty(inStripped)) {
+            return false;
+        }
+
+        final String inE164 = Utils.getE164Number(getContext(), inStripped, null); // may be empty.
+
+        if (DEBUG) {
+            Log.d(TAG, String.format("isBlocked: in=%s, stripped=%s, e164=%s", phoneNumber,
+                    inStripped, inE164));
+        }
+
+        final Cursor c = getDbHelper().getReadableDatabase().rawQuery(
+                "SELECT " +
+                BlockedNumberContract.BlockedNumbers.COLUMN_ORIGINAL_NUMBER + "," +
+                BlockedNumberContract.BlockedNumbers.COLUMN_STRIPPED_NUMBER + "," +
+                BlockedNumberContract.BlockedNumbers.COLUMN_E164_NUMBER +
+                " FROM " + BlockedNumberDatabaseHelper.Tables.BLOCKED_NUMBERS +
+                " WHERE " + BlockedNumberContract.BlockedNumbers.COLUMN_STRIPPED_NUMBER + "=?1" +
+                " OR (?2 != '' AND " +
+                        BlockedNumberContract.BlockedNumbers.COLUMN_E164_NUMBER + "=?2)",
+                new String[] {inStripped, inE164}
+                );
+        try {
+            while (c.moveToNext()) {
+                if (DEBUG) {
+                    final String original = c.getString(0);
+                    final String stripped = c.getString(1);
+                    final String e164 = c.getString(2);
+
+                    Log.d(TAG, String.format("  match found: original=%s, stripped=%s, e164=%s",
+                            original, stripped, e164));
+                }
+                return true;
+            }
+        } finally {
+            c.close();
+        }
+        // No match found.
+        return false;
+    }
+
+    /**
+     * Throws {@link SecurityException} when the caller is not root, system, the system dialer,
+     * the user selected dialer, or the default SMS app.
+     *
+     * NOT TESTED YET
+     *
+     * TODO CTS:
+     * - Call should fail for random 3p apps.
+     *
+     * TODO Add a permission to allow the contacts app to access?
+     * TODO Add a permission to allow carrier apps?
+     */
+    public void enforceReadPermission() {
+        final int callingUid = Binder.getCallingUid();
+
+        // System and root can always call it. (and myself)
+        if (UserHandle.isSameApp(callingUid, android.os.Process.SYSTEM_UID)
+                || (callingUid == Process.ROOT_UID)
+                || (callingUid == Process.myUid())) {
+            return;
+        }
+
+        final String callingPackage = getCallingPackage();
+        if (TextUtils.isEmpty(callingPackage)) {
+            Log.w(TAG, "callingPackage not accessible");
+        } else {
+
+            final TelecomManager telecom = getContext().getSystemService(TelecomManager.class);
+
+            if (callingPackage.equals(telecom.getDefaultDialerPackage())
+                || callingPackage.equals(telecom.getSystemDialerPackage())) {
+                return;
+            }
+
+            // Allow the default SMS app and the dialer app to access it.
+            final AppOpsManager appOps = getContext().getSystemService(AppOpsManager.class);
+
+            if (appOps.noteOp(AppOpsManager.OP_WRITE_SMS,
+                    Binder.getCallingUid(), callingPackage) == AppOpsManager.MODE_ALLOWED) {
+                return;
+            }
+        }
+        throw new SecurityException("Caller must be system, default dialer or default SMS app");
+    }
+
+    /**
+     * TODO CTS:
+     * - Call should fail for random 3p apps.
+     */
+    public void enforceWritePermission() {
+        // Same check as read.
+        enforceReadPermission();
+    }
+}
diff --git a/src/com/android/providers/blockednumber/Utils.java b/src/com/android/providers/blockednumber/Utils.java
new file mode 100644
index 0000000..e890634
--- /dev/null
+++ b/src/com/android/providers/blockednumber/Utils.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2016 The Android Open Source 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 com.android.providers.blockednumber;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.location.Country;
+import android.location.CountryDetector;
+import android.telephony.PhoneNumberUtils;
+import android.text.TextUtils;
+
+import java.util.Locale;
+
+public class Utils {
+    private Utils() {
+    }
+
+    public static final int MIN_INDEX_LEN = 8;
+
+    /**
+     * @return The current country code.
+     */
+    public static @NonNull String getCurrentCountryIso(@NonNull Context context) {
+        final CountryDetector detector = (CountryDetector) context.getSystemService(
+                Context.COUNTRY_DETECTOR);
+        if (detector != null) {
+            final Country country = detector.detectCountry();
+            if (country != null) {
+                return country.getCountryIso();
+            }
+        }
+        final Locale locale = context.getResources().getConfiguration().locale;
+        return locale.getCountry();
+    }
+
+    /**
+     * Strip formatting characters and the non-phone number portion from a phone number.  e.g.
+     * "+1-408-123-4444;123" to "+14081234444".
+     *
+     * <p>Special case: if a number contains '@', it's considered as an email address and returned
+     * unmodified.
+     */
+    public static @NonNull String stripPhoneNumber(@Nullable String phoneNumber) {
+        if (TextUtils.isEmpty(phoneNumber)) {
+            return "";
+        }
+        if (phoneNumber.contains("@")) {
+            return phoneNumber;
+        }
+        return PhoneNumberUtils.extractNetworkPortion(phoneNumber);
+    }
+
+    /**
+     * Converts a phone number to an E164 number, assuming the current country.  If {@code
+     * incomingE16Number} is provided, it'll just strip it and returns.  If the number is not valid,
+     * it'll return "".
+     *
+     * <p>Special case: if {@code rawNumber} contains '@', it's considered as an email address and
+     * returned unmodified.
+     */
+    public static @NonNull String getE164Number(@NonNull Context context,
+            @Nullable String rawNumber, @Nullable String incomingE16Number) {
+        if (rawNumber != null && rawNumber.contains("@")) {
+            return rawNumber;
+        }
+        if (!TextUtils.isEmpty(incomingE16Number)) {
+            return stripPhoneNumber(incomingE16Number);
+        }
+        if (TextUtils.isEmpty(rawNumber)) {
+            return "";
+        }
+        final String e164 =
+                PhoneNumberUtils.formatNumberToE164(rawNumber, getCurrentCountryIso(context));
+        return e164 == null ? "" : e164;
+    }
+
+    public static @Nullable String wrapSelectionWithParens(@Nullable String selection) {
+        return TextUtils.isEmpty(selection) ? null : "(" + selection + ")";
+    }
+}
diff --git a/tests/Android.mk b/tests/Android.mk
new file mode 100644
index 0000000..d85d7bb
--- /dev/null
+++ b/tests/Android.mk
@@ -0,0 +1,23 @@
+LOCAL_PATH:= $(call my-dir)
+include $(CLEAR_VARS)
+
+# We only want this apk build for tests.
+LOCAL_MODULE_TAGS := tests
+
+LOCAL_STATIC_JAVA_LIBRARIES := \
+    mockito-target \
+    android-support-test
+
+LOCAL_JAVA_LIBRARIES := android.test.runner
+
+# Only compile source java files in this apk.
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+
+LOCAL_PACKAGE_NAME := BlockedNumberProviderTests
+
+LOCAL_INSTRUMENTATION_FOR := BlockedNumberProvider
+LOCAL_CERTIFICATE := shared
+
+LOCAL_PROGUARD_ENABLED := disabled
+
+include $(BUILD_PACKAGE)
diff --git a/tests/AndroidManifest.xml b/tests/AndroidManifest.xml
new file mode 100644
index 0000000..0405820
--- /dev/null
+++ b/tests/AndroidManifest.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2016 The Android Open Source 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.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+        package="com.android.providers.blockednumber.tests"
+        android:sharedUserId="android.uid.shared">
+
+    <application>
+        <uses-library android:name="android.test.runner" />
+    </application>
+
+    <instrumentation
+        android:name="android.support.test.runner.AndroidJUnitRunner"
+        android:targetPackage="com.android.providers.blockednumber"
+        android:label="Blocked Numbers Tests">
+    </instrumentation>
+
+</manifest>
diff --git a/tests/src/com/android/providers/blockednumber/BlockedNumberProviderTest.java b/tests/src/com/android/providers/blockednumber/BlockedNumberProviderTest.java
new file mode 100644
index 0000000..8ec71eb
--- /dev/null
+++ b/tests/src/com/android/providers/blockednumber/BlockedNumberProviderTest.java
@@ -0,0 +1,243 @@
+/*
+ * Copyright (C) 2016 The Android Open Source 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 com.android.providers.blockednumber;
+
+import android.content.ContentResolver;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteConstraintException;
+import android.database.sqlite.SQLiteException;
+import android.net.Uri;
+import android.os.Bundle;
+import android.provider.BlockedNumberContract;
+import android.provider.BlockedNumberContract.BlockedNumbers;
+import android.test.AndroidTestCase;
+import android.test.MoreAsserts;
+import junit.framework.Assert;
+
+/**
+ m BlockedNumberProviderTests &&
+ adb install -r \
+ ${ANDROID_PRODUCT_OUT}/data/app/BlockedNumberProviderTests/BlockedNumberProviderTests.apk &&
+ adb shell am instrument -e class com.android.providers.blockednumber.BlockedNumberProviderTest \
+ -w com.android.providers.blockednumber.tests/android.support.test.runner.AndroidJUnitRunner
+ */
+public class BlockedNumberProviderTest extends AndroidTestCase {
+    private Context mRealTestContext;
+    private MyMockContext mMockContext;
+    private ContentResolver mResolver;
+
+    /** Whether the country detector thinks the device is in USA. */
+    private boolean mInUSA;
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+
+        mRealTestContext = getContext();
+        mMockContext = new MyMockContext(mRealTestContext);
+        mResolver = mMockContext.getContentResolver();
+        mInUSA = "US".equals(Utils.getCurrentCountryIso(mRealTestContext));
+    }
+
+    @Override
+    protected void tearDown() throws Exception {
+        mMockContext.shutdown();
+
+        super.tearDown();
+    }
+
+    private static ContentValues cv(Object... namesAndValues) {
+        Assert.assertTrue((namesAndValues.length % 2) == 0);
+
+        final ContentValues ret = new ContentValues();
+        for (int i = 1; i < namesAndValues.length; i += 2) {
+            final String name = namesAndValues[i - 1].toString();
+            final Object value =  namesAndValues[i];
+            if (value == null) {
+                ret.putNull(name);
+            } else if (value instanceof String) {
+                ret.put(name, (String) value);
+            } else if (value instanceof Integer) {
+                ret.put(name, (Integer) value);
+            } else if (value instanceof Long) {
+                ret.put(name, (Long) value);
+            } else {
+                Assert.fail("Unsupported type: " + value.getClass().getSimpleName());
+            }
+        }
+        return ret;
+    }
+
+    private void assertRowCount(int count, Uri uri) {
+        try (Cursor c = mResolver.query(uri, null, null, null, null)) {
+            assertEquals(count, c.getCount());
+        }
+    }
+
+    public void testGetType() {
+        assertEquals(BlockedNumbers.CONTENT_TYPE, mResolver.getType(
+                BlockedNumbers.CONTENT_URI));
+
+        assertEquals(BlockedNumbers.CONTENT_ITEM_TYPE, mResolver.getType(
+                ContentUris.withAppendedId(BlockedNumbers.CONTENT_URI, 1)));
+
+        assertNull(mResolver.getType(
+                Uri.withAppendedPath(BlockedNumberContract.AUTHORITY_URI, "invalid")));
+    }
+
+    public void testInsert() {
+        insertExpectingFailure(cv());
+        insertExpectingFailure(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, null));
+        insertExpectingFailure(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, ""));
+        insertExpectingFailure(cv(BlockedNumbers.COLUMN_ID, 1));
+        insertExpectingFailure(cv(BlockedNumbers.COLUMN_STRIPPED_NUMBER, 1));
+        insertExpectingFailure(cv(BlockedNumbers.COLUMN_E164_NUMBER, "1"));
+
+        insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "123"));
+        insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "+1-2-3"));
+        insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "+1-408-454-1111"));
+        insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "1-408-454-2222"));
+
+        try {
+            insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "1-408-454-2222"));
+            fail();
+        } catch (SQLiteConstraintException expected) {
+        }
+
+        insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "1-408-4542222"));
+
+        insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "045-381-1111",
+                BlockedNumbers.COLUMN_E164_NUMBER, "+81453811111"));
+
+        assertRowCount(6, BlockedNumbers.CONTENT_URI);
+
+        // TODO Check the table content.
+    }
+
+    private Uri insert(ContentValues cv) {
+        final Uri uri = mResolver.insert(BlockedNumbers.CONTENT_URI, cv);
+        assertNotNull(uri);
+
+        // Make sure the URI exists.
+        try (Cursor c = mResolver.query(uri, null, null, null, null)) {
+            assertEquals(1, c.getCount());
+        }
+        return uri;
+    }
+
+    private void insertExpectingFailure(ContentValues cv) {
+        try {
+            mResolver.insert(
+                    BlockedNumbers.CONTENT_URI, cv());
+            fail();
+        } catch (IllegalArgumentException expected) {
+        }
+    }
+
+    public void testDelete() {
+        // Prepare test data
+        Uri u1 = insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "123"));
+        Uri u2 = insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "+1-2-3"));
+        insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "+1-408-454-1111"));
+        insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "1-408-454-2222"));
+
+        insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "045-381-1111",
+                BlockedNumbers.COLUMN_E164_NUMBER, "12345"));
+
+        assertRowCount(5, BlockedNumbers.CONTENT_URI);
+
+        // Delete and check the # of remaining rows.
+
+        mResolver.delete(u1, null, null);
+        assertRowCount(4, BlockedNumbers.CONTENT_URI);
+
+        try {
+            mResolver.delete(u2, "1=1", null);
+            fail();
+        } catch (IllegalArgumentException expected) {
+            MoreAsserts.assertContainsRegex("selection must be null", expected.getMessage());
+        }
+
+        mResolver.delete(u2, null, null);
+        assertRowCount(3, BlockedNumbers.CONTENT_URI);
+
+        mResolver.delete(BlockedNumbers.CONTENT_URI,
+                BlockedNumbers.COLUMN_E164_NUMBER + "=?",
+                new String[]{"12345"});
+        assertRowCount(2, BlockedNumbers.CONTENT_URI);
+
+        // SQL injection should be detected.
+        try {
+            mResolver.delete(BlockedNumbers.CONTENT_URI, "; DROP TABLE blocked; ", null);
+            fail();
+        } catch (SQLiteException expected) {
+        }
+        assertRowCount(2, BlockedNumbers.CONTENT_URI);
+
+        mResolver.delete(BlockedNumbers.CONTENT_URI, null, null);
+        assertRowCount(0, BlockedNumbers.CONTENT_URI);
+    }
+
+    public void testUpdate() {
+        try {
+            mResolver.update(BlockedNumbers.CONTENT_URI, cv(),
+                    /* selection =*/ null, /* args =*/ null);
+            fail();
+        } catch (UnsupportedOperationException expected) {
+            MoreAsserts.assertContainsRegex("Update is not supported", expected.getMessage());
+        }
+    }
+
+    public void testIsBlocked() {
+        // Prepare test data
+        Uri u1 = insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "123"));
+        Uri u2 = insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "+1.2-3"));
+        insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "+1-500-454-1111"));
+        insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "1-500-454-2222"));
+
+        insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "045-111-2222",
+                BlockedNumbers.COLUMN_E164_NUMBER, "+81-45-111-2222"));
+
+        insert(cv(BlockedNumbers.COLUMN_ORIGINAL_NUMBER, "abc.def@gmail.com"));
+
+        // Check
+        assertIsBlocked(true, "123");
+        assertIsBlocked(false, "1234");
+        assertIsBlocked(true, "+81451112222");
+        assertIsBlocked(true, "+81 45 111 2222");
+        assertIsBlocked(true, "045 111 2222");
+
+        if (mInUSA) {
+            // Probably won't work outside of the +1 region.
+            assertIsBlocked(true, "500-454 1111");
+            assertIsBlocked(true, "500-454 2222");
+        }
+        assertIsBlocked(true, "+1 500-454 1111");
+        assertIsBlocked(true, "1 500-454 1111");
+
+        assertIsBlocked(true, "abc.def@gmail.com");
+        assertIsBlocked(false, "abc.def@gmail.co");
+        assertIsBlocked(false, "bc.def@gmail.com");
+        assertIsBlocked(false, "abcdef@gmail.com");
+    }
+
+    private void assertIsBlocked(boolean expected, String phoneNumber) {
+        assertEquals(expected, BlockedNumberContract.isBlocked(mMockContext, phoneNumber));
+    }
+}
diff --git a/tests/src/com/android/providers/blockednumber/BlockedNumberProviderTestable.java b/tests/src/com/android/providers/blockednumber/BlockedNumberProviderTestable.java
new file mode 100644
index 0000000..3c95089
--- /dev/null
+++ b/tests/src/com/android/providers/blockednumber/BlockedNumberProviderTestable.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2016 The Android Open Source 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 com.android.providers.blockednumber;
+
+public class BlockedNumberProviderTestable extends BlockedNumberProvider {
+    private BlockedNumberDatabaseHelper mDbHelper;
+
+    @Override
+    public boolean onCreate() {
+        super.onCreate();
+
+        mDbHelper = BlockedNumberDatabaseHelper.newInstanceForTest(getContext());
+
+        return true;
+    }
+
+    @Override
+    BlockedNumberDatabaseHelper getDbHelper() {
+        return mDbHelper;
+    }
+
+    @Override
+    public void shutdown() {
+        mDbHelper.getReadableDatabase().close();
+
+        super.shutdown();
+    }
+}
diff --git a/tests/src/com/android/providers/blockednumber/MyMockContext.java b/tests/src/com/android/providers/blockednumber/MyMockContext.java
new file mode 100644
index 0000000..14d4f84
--- /dev/null
+++ b/tests/src/com/android/providers/blockednumber/MyMockContext.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2016 The Android Open Source 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 com.android.providers.blockednumber;
+
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.pm.ProviderInfo;
+import android.location.CountryDetector;
+import android.provider.BlockedNumberContract;
+import android.test.mock.MockContentResolver;
+import android.test.mock.MockContext;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+public class MyMockContext extends MockContext {
+    public final Context realTestContext;
+
+    @Mock
+    CountryDetector countryDetector;
+
+    MockContentResolver resolver;
+
+    BlockedNumberProviderTestable provider;
+
+    public MyMockContext(Context realTestContext) {
+        this.realTestContext = realTestContext;
+        MockitoAnnotations.initMocks(this);
+
+        resolver = new MockContentResolver();
+
+        provider = new BlockedNumberProviderTestable();
+
+        final ProviderInfo info = new ProviderInfo();
+        info.authority = BlockedNumberContract.AUTHORITY;
+        provider.attachInfoForTesting(realTestContext, info);
+
+        resolver.addProvider(BlockedNumberContract.AUTHORITY, provider);
+    }
+
+    @Override
+    public Object getSystemService(String name) {
+        switch (name) {
+            case Context.COUNTRY_DETECTOR:
+                return countryDetector;
+        }
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public ContentResolver getContentResolver() {
+        return resolver;
+    }
+
+    public void shutdown() {
+        provider.shutdown();
+    }
+}
+