93de411538
Example provider that encrypts both metadata and contents of documents stored inside. It shows advanced usage of new storage access APIs and hardware-backed key chain. Change-Id: I2cdf4e949be8471c3d8b4f45ec0681c9248ea09c
73 lines
2.1 KiB
Java
73 lines
2.1 KiB
Java
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.vault;
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import android.os.ParcelFileDescriptor;
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import java.io.ByteArrayOutputStream;
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import java.io.Closeable;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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public class Utils {
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public static void closeQuietly(Closeable closable) {
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if (closable != null) {
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try {
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closable.close();
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} catch (IOException ignored) {
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}
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}
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}
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public static void closeWithErrorQuietly(ParcelFileDescriptor pfd, String msg) {
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if (pfd != null) {
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try {
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pfd.closeWithError(msg);
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} catch (IOException ignored) {
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}
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}
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}
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public static void writeFully(File file, byte[] data) throws IOException {
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final OutputStream out = new FileOutputStream(file);
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try {
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out.write(data);
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} finally {
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out.close();
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}
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}
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public static byte[] readFully(File file) throws IOException {
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final InputStream in = new FileInputStream(file);
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try {
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ByteArrayOutputStream bytes = new ByteArrayOutputStream();
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byte[] buffer = new byte[1024];
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int count;
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while ((count = in.read(buffer)) != -1) {
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bytes.write(buffer, 0, count);
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}
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return bytes.toByteArray();
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} finally {
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in.close();
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}
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}
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}
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