001/* 002 * Copyright 2013 Anyware Services 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.ametys.web.cache.monitoring.process.access; 017 018import java.io.UnsupportedEncodingException; 019import java.security.MessageDigest; 020import java.security.NoSuchAlgorithmException; 021 022import org.apache.commons.codec.binary.Hex; 023import org.slf4j.Logger; 024import org.slf4j.LoggerFactory; 025 026/** 027 * Utility methods used when dealing with <code>ResourceAccess</code> object. 028 */ 029public final class ResourceAccessUtils 030{ 031 private static final Logger __LOGGER = LoggerFactory.getLogger(ResourceAccessUtils.class); 032 033 private ResourceAccessUtils() 034 { 035 // empty private constructor 036 } 037 038 /** 039 * Computes the SHA-256 hash for a string. 040 * @param str The string to be hashed. 041 * @return The hashed string. 042 */ 043 public static String toHash(String str) 044 { 045 MessageDigest md; 046 byte[] hash; 047 048 try 049 { 050 md = MessageDigest.getInstance("SHA-256"); 051 hash = md.digest(str.getBytes("UTF-8")); 052 } 053 catch (NoSuchAlgorithmException e) 054 { 055 __LOGGER.error("Cannot get the message digest instance for SHA-256", e); 056 return null; 057 } 058 catch (UnsupportedEncodingException e) 059 { 060 __LOGGER.error("UnsupportedEncodingException UTF-8", e); 061 return null; 062 } 063 064 return Hex.encodeHexString(hash); 065 } 066}