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Unified Diff: chrome/android/java/src/org/chromium/chrome/browser/util/HashUtil.java

Issue 12313075: [sync] Upstream the Android ProfileSyncService (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: rebased Created 7 years, 9 months ago
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Index: chrome/android/java/src/org/chromium/chrome/browser/util/HashUtil.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/util/HashUtil.java b/chrome/android/java/src/org/chromium/chrome/browser/util/HashUtil.java
new file mode 100644
index 0000000000000000000000000000000000000000..a5fb5bb8e40606eac66c99b71858e6611549a9b2
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/util/HashUtil.java
@@ -0,0 +1,62 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.util;
+
+import android.util.Log;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.util.Formatter;
+
+import javax.annotation.Nullable;
+
+/**
+ * Helper functions for working with hashes.
+ */
+public final class HashUtil {
+ private static final String TAG = HashUtil.class.getSimpleName();
+
+ private HashUtil() {
+ }
+
+ public static class Params {
+ private final String mText;
+ private String mSalt;
+
+ public Params(String text) {
+ mText = text;
+ }
+
+ public Params withSalt(String salt) {
+ mSalt = salt;
+ return this;
+ }
+ }
+
+ public static String getMd5Hash(Params params) {
+ return getHash(params, "MD5");
+ }
+
+ private static String getHash(Params params, String algorithm) {
+ try {
+ String digestText = params.mText + (params.mSalt == null ? "" : params.mSalt);
+ MessageDigest m = MessageDigest.getInstance(algorithm);
+ byte[] digest = m.digest(digestText.getBytes());
+ return encodeHex(digest);
+ } catch (NoSuchAlgorithmException e) {
+ Log.e(TAG, "Unable to find digest algorithm " + algorithm);
+ return null;
+ }
+ }
+
+ private static String encodeHex(byte[] data) {
+ StringBuilder sb = new StringBuilder(data.length * 2);
+ Formatter formatter = new Formatter(sb);
+ for (byte b : data) {
+ formatter.format("%02x", b);
+ }
+ return sb.toString();
+ }
+}

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