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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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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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package org.apache.tomcat.util.security;
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* Encode an MD5 digest into a String.
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* The 128 bit MD5 hash is converted into a 32 character long String.
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* Each character of the String is the hexadecimal representation of 4 bits
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* @author Remy Maucherat
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public final class MD5Encoder {
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private MD5Encoder() {
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// Hide default constructor for utility class
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private static final char[] hexadecimal = {'0', '1', '2', '3', '4', '5',
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'6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
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* Encodes the 128 bit (16 bytes) MD5 into a 32 character String.
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* @param binaryData Array containing the digest
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* @return Encoded MD5, or null if encoding failed
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public static String encode(byte[] binaryData) {
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if (binaryData.length != 16)
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char[] buffer = new char[32];
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for (int i=0; i<16; i++) {
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int low = binaryData[i] & 0x0f;
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int high = (binaryData[i] & 0xf0) >> 4;
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buffer[i*2] = hexadecimal[high];
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buffer[i*2 + 1] = hexadecimal[low];
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return new String(buffer);
added
removed
java/org/apache/tomcat/util/security/MD5Encoder.java
