Here you can find the source of digest(MessageDigest digest, InputStream data)
Parameter | Description |
---|---|
digest | The MessageDigest to use (e.g. MD5) |
data | Data to digest |
Parameter | Description |
---|---|
IOException | On error reading from the stream |
private static byte[] digest(MessageDigest digest, InputStream data) throws IOException
//package com.java2s; /*/* w ww .j a v a2s . c om*/ * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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. */ import java.io.IOException; import java.io.InputStream; import java.security.MessageDigest; public class Main { private static final int STREAM_BUFFER_LENGTH = 1024; /** * Read through an InputStream and returns the digest for the data * * @param digest The MessageDigest to use (e.g. MD5) * @param data Data to digest * @return MD5 digest * @throws IOException On error reading from the stream */ private static byte[] digest(MessageDigest digest, InputStream data) throws IOException { byte[] buffer = new byte[STREAM_BUFFER_LENGTH]; int read = data.read(buffer, 0, STREAM_BUFFER_LENGTH); while (read > -1) { digest.update(buffer, 0, read); read = data.read(buffer, 0, STREAM_BUFFER_LENGTH); } return digest.digest(); } }