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Android example source code file (MessageDigest.java)
The MessageDigest.java Android example source code/* * Copyright (C) 2007 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 android.security; import java.security.NoSuchAlgorithmException; /** * Base class for producing a message digest from different hash encryptions. */ public abstract class MessageDigest { /** * Returns a digest object of the specified type. * * @param algorithm The type of hash function to use. Valid values are * <em>SHA-1 and MD5. * @return The respective MessageDigest object. Either a * {@link android.security.Sha1MessageDigest} or * {@link android.security.Md5MessageDigest} object. * @throws NoSuchAlgorithmException If an invalid <var>algorithm * is given. */ public static MessageDigest getInstance(String algorithm) throws NoSuchAlgorithmException { if (algorithm == null) { return null; } if (algorithm.equals("SHA-1")) { return new Sha1MessageDigest(); } else if (algorithm.equals("MD5")) { return new Md5MessageDigest(); } throw new NoSuchAlgorithmException(); } public abstract void update(byte[] input); public abstract byte[] digest(); /** * Produces a message digest for the given input. * * @param input The message to encrypt. * @return The digest (hash sum). */ public abstract byte[] digest(byte[] input); } Other Android examples (source code examples)Here is a short list of links related to this Android MessageDigest.java source code file: |
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