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MD5.java
Package: HTTP客户端.zip [view]
Upload User: demmber
Upload Date: 2007-12-22
Package Size: 717k
Code Size: 4k
Category:
Java Develop
Development Platform:
Java
- /*
- * @(#)MD5.java 0.3-3 06/05/2001
- *
- * This file is part of the HTTPClient package
- * Copyright (C) 1996-2001 Ronald Tschal鋜
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307, USA
- *
- * For questions, suggestions, bug-reports, enhancement-requests etc.
- * I may be contacted at:
- *
- * ronald@innovation.ch
- *
- * The HTTPClient's home page is located at:
- *
- * http://www.innovation.ch/java/HTTPClient/
- *
- */
- package HTTPClient;
- import java.io.UnsupportedEncodingException;
- import java.security.MessageDigest;
- import java.security.NoSuchAlgorithmException;
- /**
- * Some utility methods for digesting info using MD5.
- *
- * @version 0.3-3 06/05/2001
- * @author Ronald Tschal鋜
- * @since V0.3-3
- */
- class MD5
- {
- private static final char[] hex = {
- '0', '1', '2', '3', '4', '5', '6', '7',
- '8', '9', 'a', 'b', 'c', 'd', 'e', 'f',
- };
- /**
- * Turns array of bytes into string representing each byte as
- * unsigned hex number.
- *
- * @param hash array of bytes to convert to hex-string
- * @return generated hex string
- */
- public static final String toHex(byte hash[])
- {
- StringBuffer buf = new StringBuffer(hash.length * 2);
- for (int idx=0; idx<hash.length; idx++)
- buf.append(hex[(hash[idx] >> 4) & 0x0f]).append(hex[hash[idx] & 0x0f]);
- return buf.toString();
- }
- /**
- * Digest the input.
- *
- * @param input the data to be digested.
- * @return the md5-digested input
- */
- public static final byte[] digest(byte[] input)
- {
- try
- {
- MessageDigest md5 = MessageDigest.getInstance("MD5");
- return md5.digest(input);
- }
- catch (NoSuchAlgorithmException nsae)
- {
- throw new Error(nsae.toString());
- }
- }
- /**
- * Digest the input.
- *
- * @param input1 the first part of the data to be digested.
- * @param input2 the second part of the data to be digested.
- * @return the md5-digested input
- */
- public static final byte[] digest(byte[] input1, byte[] input2)
- {
- try
- {
- MessageDigest md5 = MessageDigest.getInstance("MD5");
- md5.update(input1);
- return md5.digest(input2);
- }
- catch (NoSuchAlgorithmException nsae)
- {
- throw new Error(nsae.toString());
- }
- }
- /**
- * Digest the input.
- *
- * @param input the data to be digested.
- * @return the md5-digested input as a hex string
- */
- public static final String hexDigest(byte[] input)
- {
- return toHex(digest(input));
- }
- /**
- * Digest the input.
- *
- * @param input1 the first part of the data to be digested.
- * @param input2 the second part of the data to be digested.
- * @return the md5-digested input as a hex string
- */
- public static final String hexDigest(byte[] input1, byte[] input2)
- {
- return toHex(digest(input1, input2));
- }
- /**
- * Digest the input.
- *
- * @param input the data to be digested.
- * @return the md5-digested input as a hex string
- */
- public static final byte[] digest(String input)
- {
- try
- { return digest(input.getBytes("8859_1")); }
- catch (UnsupportedEncodingException uee)
- { throw new Error(uee.toString()); }
- }
- /**
- * Digest the input.
- *
- * @param input the data to be digested.
- * @return the md5-digested input as a hex string
- */
- public static final String hexDigest(String input)
- {
- try
- { return toHex(digest(input.getBytes("8859_1"))); }
- catch (UnsupportedEncodingException uee)
- { throw new Error(uee.toString()); }
- }
- }