mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
302 lines
8.7 KiB
Java
302 lines
8.7 KiB
Java
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.gecko.sync;
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import java.io.UnsupportedEncodingException;
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import java.math.BigDecimal;
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import java.math.BigInteger;
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import java.net.URLDecoder;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.security.SecureRandom;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.Locale;
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import java.util.Map;
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import java.util.TreeMap;
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import org.json.simple.JSONArray;
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import org.mozilla.apache.commons.codec.binary.Base32;
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import org.mozilla.apache.commons.codec.binary.Base64;
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import android.content.Context;
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import android.content.SharedPreferences;
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public class Utils {
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private static final String LOG_TAG = "Utils";
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private static SecureRandom sharedSecureRandom = new SecureRandom();
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// See <http://developer.android.com/reference/android/content/Context.html#getSharedPreferences%28java.lang.String,%20int%29>
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public static final int SHARED_PREFERENCES_MODE = 0;
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public static String generateGuid() {
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byte[] encodedBytes = Base64.encodeBase64(generateRandomBytes(9), false);
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return new String(encodedBytes).replace("+", "-").replace("/", "_");
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}
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/**
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* Helper to generate secure random bytes.
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*
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* @param length
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* Number of bytes to generate.
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*/
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public static byte[] generateRandomBytes(int length) {
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byte[] bytes = new byte[length];
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sharedSecureRandom.nextBytes(bytes);
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return bytes;
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}
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/**
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* Helper to generate a random integer in a specified range.
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*
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* @param r
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* Generate an integer between 0 and r-1 inclusive.
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*/
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public static BigInteger generateBigIntegerLessThan(BigInteger r) {
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int maxBytes = (int) Math.ceil(((double) r.bitLength()) / 8);
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BigInteger randInt = new BigInteger(generateRandomBytes(maxBytes));
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return randInt.mod(r);
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}
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/**
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* Helper to reseed the shared secure random number generator.
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*/
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public static void reseedSharedRandom() {
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sharedSecureRandom.setSeed(sharedSecureRandom.generateSeed(8));
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}
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/**
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* Helper to convert a byte array to a hex-encoded string
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*/
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public static String byte2hex(byte[] b) {
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// StringBuffer should be used instead.
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String hs = "";
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String stmp;
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for (int n = 0; n < b.length; n++) {
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stmp = java.lang.Integer.toHexString(b[n] & 0XFF);
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if (stmp.length() == 1) {
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hs = hs + "0" + stmp;
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} else {
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hs = hs + stmp;
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}
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if (n < b.length - 1) {
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hs = hs + "";
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}
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}
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return hs;
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}
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public static byte[] concatAll(byte[] first, byte[]... rest) {
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int totalLength = first.length;
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for (byte[] array : rest) {
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totalLength += array.length;
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}
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byte[] result = new byte[totalLength];
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int offset = first.length;
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System.arraycopy(first, 0, result, 0, offset);
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for (byte[] array : rest) {
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System.arraycopy(array, 0, result, offset, array.length);
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offset += array.length;
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}
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return result;
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}
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/**
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* Utility for Base64 decoding. Should ensure that the correct
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* Apache Commons version is used.
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*
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* @param base64
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* An input string. Will be decoded as UTF-8.
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* @return
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* A byte array of decoded values.
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* @throws UnsupportedEncodingException
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* Should not occur.
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*/
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public static byte[] decodeBase64(String base64) throws UnsupportedEncodingException {
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return Base64.decodeBase64(base64.getBytes("UTF-8"));
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}
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public static byte[] decodeFriendlyBase32(String base32) {
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Base32 converter = new Base32();
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final String translated = base32.replace('8', 'l').replace('9', 'o');
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return converter.decode(translated.toUpperCase());
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}
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public static byte[] hex2Byte(String str) {
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if (str.length() % 2 == 1) {
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str = "0" + str;
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}
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byte[] bytes = new byte[str.length() / 2];
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for (int i = 0; i < bytes.length; i++) {
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bytes[i] = (byte) Integer.parseInt(str.substring(2 * i, 2 * i + 2), 16);
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}
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return bytes;
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}
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public static String millisecondsToDecimalSecondsString(long ms) {
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return millisecondsToDecimalSeconds(ms).toString();
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}
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// For dumping into JSON without quotes.
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public static BigDecimal millisecondsToDecimalSeconds(long ms) {
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return new BigDecimal(ms).movePointLeft(3);
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}
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// This lives until Bug 708956 lands, and we don't have to do it any more.
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public static long decimalSecondsToMilliseconds(String decimal) {
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try {
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return new BigDecimal(decimal).movePointRight(3).longValue();
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} catch (Exception e) {
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return -1;
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}
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}
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// Oh, Java.
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public static long decimalSecondsToMilliseconds(Double decimal) {
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// Truncates towards 0.
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return (long)(decimal * 1000);
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}
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public static long decimalSecondsToMilliseconds(Long decimal) {
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return decimal * 1000;
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}
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public static long decimalSecondsToMilliseconds(Integer decimal) {
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return (long)(decimal * 1000);
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}
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public static byte[] sha1(String utf8)
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throws NoSuchAlgorithmException, UnsupportedEncodingException {
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MessageDigest sha1 = MessageDigest.getInstance("SHA-1");
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return sha1.digest(utf8.getBytes("UTF-8"));
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}
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public static String sha1Base32(String utf8)
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throws NoSuchAlgorithmException, UnsupportedEncodingException {
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return new Base32().encodeAsString(sha1(utf8)).toLowerCase(Locale.US);
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}
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public static String getPrefsPath(String username, String serverURL)
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throws NoSuchAlgorithmException, UnsupportedEncodingException {
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return "sync.prefs." + sha1Base32(serverURL + ":" + username);
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}
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public static SharedPreferences getSharedPreferences(Context context, String username, String serverURL) throws NoSuchAlgorithmException, UnsupportedEncodingException {
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String prefsPath = getPrefsPath(username, serverURL);
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Logger.debug(LOG_TAG, "Shared preferences: " + prefsPath);
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return context.getSharedPreferences(prefsPath, SHARED_PREFERENCES_MODE);
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}
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public static void addToIndexBucketMap(TreeMap<Long, ArrayList<String>> map, long index, String value) {
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ArrayList<String> bucket = map.get(index);
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if (bucket == null) {
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bucket = new ArrayList<String>();
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}
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bucket.add(value);
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map.put(index, bucket);
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}
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/**
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* Yes, an equality method that's null-safe.
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*/
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private static boolean same(Object a, Object b) {
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if (a == b) {
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return true;
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}
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if (a == null || b == null) {
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return false; // If both null, case above applies.
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}
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return a.equals(b);
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}
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/**
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* Return true if the two arrays are both null, or are both arrays
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* containing the same elements in the same order.
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*/
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public static boolean sameArrays(JSONArray a, JSONArray b) {
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if (a == b) {
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return true;
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}
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if (a == null || b == null) {
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return false;
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}
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final int size = a.size();
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if (size != b.size()) {
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return false;
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}
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for (int i = 0; i < size; ++i) {
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if (!same(a.get(i), b.get(i))) {
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return false;
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}
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}
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return true;
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}
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/**
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* Takes a URI, extracting URI components.
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* @param scheme the URI scheme on which to match.
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*/
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public static Map<String, String> extractURIComponents(String scheme, String uri) {
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if (uri.indexOf(scheme) != 0) {
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throw new IllegalArgumentException("URI scheme does not match: " + scheme);
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}
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// Do this the hard way to avoid taking a large dependency on
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// HttpClient or getting all regex-tastic.
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String components = uri.substring(scheme.length());
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HashMap<String, String> out = new HashMap<String, String>();
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String[] parts = components.split("&");
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for (int i = 0; i < parts.length; ++i) {
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String part = parts[i];
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if (part.length() == 0) {
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continue;
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}
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String[] pair = part.split("=", 2);
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switch (pair.length) {
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case 0:
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continue;
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case 1:
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out.put(URLDecoder.decode(pair[0]), null);
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break;
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case 2:
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out.put(URLDecoder.decode(pair[0]), URLDecoder.decode(pair[1]));
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break;
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}
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}
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return out;
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}
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// Because TextUtils.join is not stubbed.
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public static String toDelimitedString(String delimiter, Collection<String> items) {
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if (items == null || items.size() == 0) {
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return "";
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}
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StringBuilder sb = new StringBuilder();
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int i = 0;
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int c = items.size();
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for (String string : items) {
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sb.append(string);
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if (++i < c) {
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sb.append(delimiter);
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}
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}
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return sb.toString();
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}
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public static String toCommaSeparatedString(Collection<String> items) {
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return toDelimitedString(", ", items);
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}
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}
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