Java tutorial
/** * * Copyright (c) 2014, the Railo Company Ltd. All rights reserved. * * 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 2.1 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, see <http://www.gnu.org/licenses/>. * **/ package lucee.commons.digest; import java.io.IOException; import java.io.InputStream; import java.nio.charset.Charset; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import lucee.commons.io.CharsetUtil; import lucee.commons.io.IOUtil; import lucee.commons.io.res.Resource; import org.apache.commons.codec.digest.DigestUtils; public class Hash { public static final char[] ENCODING_HEX = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; public static final char[] ENCODING_HEXUC = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; //public static final char[] ENCODING_ASCII = "0123456789abcdefghijklmnopqrstuvwxyz".toCharArray(); private static final byte[] DEL = new byte[] { 58 }; public static final String ALGORITHM_MD5 = "MD5"; public static final String ALGORITHM_SHA_256 = "SHA-256"; public static final String ALGORITHM_SHA_384 = "SHA-384"; public static final String ALGORITHM_SHA_512 = "SHA-512"; public static final String ALGORITHM_SHA = "SHA"; // MD5 public static String md5(byte[] data) throws NoSuchAlgorithmException { return hash(data, ALGORITHM_MD5, ENCODING_HEX); } // MD5 public static String md5(Resource res) throws NoSuchAlgorithmException, IOException { InputStream is = res.getInputStream(); try { return DigestUtils.md5Hex(is); } finally { IOUtil.closeEL(is); } } public static String md5(String str) throws NoSuchAlgorithmException { return hash(str, ALGORITHM_MD5, ENCODING_HEX, CharsetUtil.UTF8); } public static String md5(String str, Charset charset) throws NoSuchAlgorithmException { return hash(str, ALGORITHM_MD5, ENCODING_HEX, charset); } // SHA public static String sha(byte[] data) throws NoSuchAlgorithmException { return hash(data, ALGORITHM_SHA, ENCODING_HEX); } public static String sha(String str) throws NoSuchAlgorithmException { return hash(str, ALGORITHM_SHA, ENCODING_HEX, CharsetUtil.UTF8); } public static String sha(String str, Charset charset) throws NoSuchAlgorithmException { return hash(str, ALGORITHM_SHA, ENCODING_HEX, charset); } // SHA256 public static String sha256(byte[] data) throws NoSuchAlgorithmException { return hash(data, ALGORITHM_SHA_256, ENCODING_HEX); } public static String sha256(String str) throws NoSuchAlgorithmException { return hash(str, ALGORITHM_SHA_256, ENCODING_HEX, CharsetUtil.UTF8); } public static String sha256(String str, Charset charset) throws NoSuchAlgorithmException { return hash(str, ALGORITHM_SHA_256, ENCODING_HEX, charset); } // SHA384 public static String sha384(byte[] data) throws NoSuchAlgorithmException { return hash(data, ALGORITHM_SHA_384, ENCODING_HEX); } public static String sha384(String str) throws NoSuchAlgorithmException { return hash(str, ALGORITHM_SHA_384, ENCODING_HEX, CharsetUtil.UTF8); } public static String sha384(String str, Charset charset) throws NoSuchAlgorithmException { return hash(str, ALGORITHM_SHA_384, ENCODING_HEX, charset); } // SHA384 public static String sha512(byte[] data) throws NoSuchAlgorithmException { return hash(data, ALGORITHM_SHA_512, ENCODING_HEX); } public static String sha512(String str) throws NoSuchAlgorithmException { return hash(str, ALGORITHM_SHA_512, ENCODING_HEX, CharsetUtil.UTF8); } public static String sha512(String str, Charset charset) throws NoSuchAlgorithmException { return hash(str, ALGORITHM_SHA_512, ENCODING_HEX, charset); } public static String hash(String str, String nonce, String algorithm, char[] encoding) throws NoSuchAlgorithmException { MessageDigest md = MessageDigest.getInstance(algorithm); md.reset(); md.update(toBytes(str, CharsetUtil.UTF8)); md.update(DEL); md.update(toBytes(nonce, CharsetUtil.UTF8)); return new String(enc(md.digest(), encoding)); // no charset needed because all characters are below us-ascii (hex) } public static String hash(String input, String algorithm, int numIterations) throws NoSuchAlgorithmException { return hash(input, algorithm, numIterations, ENCODING_HEXUC); } public static String hash(String str, String algorithm, int numIterations, char[] encoding) throws NoSuchAlgorithmException { try { MessageDigest md = MessageDigest.getInstance(algorithm), mdc; for (int i = 0; i < numIterations; i++) { mdc = (MessageDigest) md.clone(); mdc.reset(); mdc.update(toBytes(str, CharsetUtil.UTF8)); str = new String(enc(mdc.digest(), encoding)); } return str; } catch (CloneNotSupportedException e) { } // if not possible to clone the MessageDigest create always a new instance for (int i = 0; i < numIterations; i++) { str = hash(str, algorithm, encoding, CharsetUtil.UTF8); } return str; } public static String hash(String str, String algorithm, char[] encoding, Charset charset) throws NoSuchAlgorithmException { return hash(toBytes(str, charset), algorithm, encoding); } public static String hash(byte[] data, String algorithm, char[] encoding) throws NoSuchAlgorithmException { MessageDigest md = MessageDigest.getInstance(algorithm); md.reset(); md.update(data); return new String(enc(md.digest(), encoding)); // no charset needed because all characters are below us-ascii (hex) } private static byte[] toBytes(String str, Charset charset) { if (str == null) return null; return str.getBytes(charset); } public static String toHexString(byte[] data, boolean upperCase) { return new String(enc(data, upperCase ? ENCODING_HEXUC : ENCODING_HEX)); } private static char[] enc(byte[] data, char[] enc) { int len = data.length; char[] out = new char[len << 1]; // two characters form the hex value. for (int i = 0, j = 0; i < len; i++) { out[j++] = enc[(0xF0 & data[i]) >>> 4]; out[j++] = enc[0x0F & data[i]]; } return out; } }