com.wudaosoft.commons.utils.DigestUtils Maven / Gradle / Ivy
/**
* Copyright 2009-2018 Wudao Software Studio(wudaosoft.com)
*
* Licensed 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.
*/
package com.wudaosoft.commons.utils;
import java.security.MessageDigest;
import org.apache.commons.codec.binary.Base64;
/**
* 消息摘要类,有md5和sha1
* @author Changsoul.Wu
* @date 2014年3月28日 下午3:53:55
*/
public class DigestUtils {
private static final String MD5_ALGORITHM = "MD5";
private static final String SHA1_ALGORITHM = "SHA1";
private static final char[] HEX_DIGITS = { '0', '1', '2', '3', '4', '5',
'6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
/**
* SHA1编码
* @param str
* @return String
*/
public static String sha1(String str) {
return encode(SHA1_ALGORITHM, str);
}
/**
* MD5编码
* @param str
* @return String
*/
public static String md5(String str) {
return encode(MD5_ALGORITHM, str);
}
public static String md5EncryptAndBase64(String str) {
return encodeBase64(md5Encrypt(str));
}
private static byte[] md5Encrypt(String encryptStr) {
try {
MessageDigest md5 = MessageDigest.getInstance(MD5_ALGORITHM);
md5.update(encryptStr.getBytes("utf8"));
return md5.digest();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private static String encodeBase64(byte[] b) {
return Base64.encodeBase64String(b);
}
/**
* @param algorithm
* @param str
* @return
*/
private static String encode(final String algorithm, final String str) {
if (str == null)
return null;
try {
MessageDigest messageDigest = MessageDigest.getInstance(algorithm);
messageDigest.update(str.getBytes("UTF-8"));
return byte2String(messageDigest.digest());
} catch (Exception e) {
// throw new RuntimeException(e);
}
return null;
}
private static String byte2String(byte[] bytes) {
int len = bytes.length;
StringBuilder sb = new StringBuilder(len * 2);
for (int i = 0; i < len; i++) {
sb.append(HEX_DIGITS[(bytes[i] >> 4) & 0x0f]);
sb.append(HEX_DIGITS[bytes[i] & 0x0f]);
}
return sb.toString();
}
}