MD5工具类
package com.nasc.base.util;
import java.io.ByteArrayOutputStream;
import java.security.MessageDigest;
import java.security.SecureRandom;
import java.util.Arrays;
/**
* MD5工具类;
*
* @author hanleng
* @version 2.0
* @since 2012-11-26
*/
public class MD5Util {
private static final String KEY_ACCPWD_CRYPT = "LAIDAN_PTS";
// private static final String KEY_ACCPWD_CRYPT = "LAIDAN_TUYOU";
/**
* 32位小写MD5加密;
*
* @param inputStr 需加密的内容
* @return
*/
public static String GetMD5By32(String inputStr) {
MessageDigest messageDigest = null;
try {
messageDigest = MessageDigest.getInstance("MD5");
messageDigest.reset();
messageDigest.update(inputStr.getBytes("UTF-8"));
} catch (Exception e) {
e.printStackTrace();
}
byte[] byteArray = messageDigest.digest();
StringBuffer md5StrBuff = new StringBuffer();
for (int i = 0; i < byteArray.length; i++) {
if (Integer.toHexString(0xFF & byteArray[i]).length() == 1) {
md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));
} else {
md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));
}
}
return md5StrBuff.toString();
}
/**
* 32位小写MD5加密;
*
* @param inputStr 需加密的内容
* @param charset 字符类型
* @return
*/
public static String GetMD5By32(String inputStr, String charset) {
MessageDigest messageDigest = null;
try {
messageDigest = MessageDigest.getInstance("MD5");
messageDigest.reset();
messageDigest.update(inputStr.getBytes(charset));
} catch (Exception e) {
e.printStackTrace();
}
byte[] byteArray = messageDigest.digest();
StringBuffer md5StrBuff = new StringBuffer();
for (int i = 0; i < byteArray.length; i++) {
if (Integer.toHexString(0xFF & byteArray[i]).length() == 1) {
md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i]));
} else {
md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));
}
}
return md5StrBuff.toString();
}
private static final String HEX_NUMS_STR = "0123456789ABCDEF";
private static final Integer SALT_LENGTH = 12;
/**
* 16进制大写格式的MD5口令加密
*
* @param inputStr 需加密的内容
* @return
*/
public String GetMD5By16(String inputStr) {
byte[] pwd = null;
try {
SecureRandom random = new SecureRandom();
byte[] salt = new byte[SALT_LENGTH];
random.nextBytes(salt);
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(salt);
md.update(inputStr.getBytes("UTF-8"));
byte[] digest = md.digest();
pwd = new byte[digest.length + SALT_LENGTH];
System.arraycopy(salt, 0, pwd, 0, SALT_LENGTH);
System.arraycopy(digest, 0, pwd, SALT_LENGTH, digest.length);
} catch (Exception e) {
e.printStackTrace();
}
return ByteToHexString(pwd);
}
/**
* 16进制MD5口令解密
*
* @param inputStr 需解密的内容
* @param md5Str 加密后的字符串
* @return
*/
public boolean ValidMD5By16(String inputStr, String md5Str) {
byte[] digest = null;
byte[] digestInDb = null;
try {
byte[] pwdInDb = HexStringToByte(md5Str);
byte[] salt = new byte[SALT_LENGTH];
System.arraycopy(pwdInDb, 0, salt, 0, SALT_LENGTH);
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(salt);
md.update(inputStr.getBytes("UTF-8"));
digest = md.digest();
digestInDb = new byte[pwdInDb.length - SALT_LENGTH];
System.arraycopy(pwdInDb, SALT_LENGTH, digestInDb, 0, digestInDb.length);
} catch (Exception e) {
e.printStackTrace();
}
if (Arrays.equals(digest, digestInDb)) {
return true;
} else {
return false;
}
}
/**
* 字节数组格式化为16进制字符串
*
* @param b
* @return
*/
public String ByteToHexString(byte[] b) {
StringBuffer hexString = new StringBuffer();
for (int i = 0; i < b.length; i++) {
String hex = Integer.toHexString(b[i] & 0xFF);
if (hex.length() == 1) {
hex = '0' + hex;
}
hexString.append(hex.toUpperCase());
}
return hexString.toString();
}
/**
* 16进制字符串转换成字节数组
*
* @param hex
* @return
*/
public byte[] HexStringToByte(String hex) {
int len = (hex.length() / 2);
byte[] result = new byte[len];
char[] hexChars = hex.toCharArray();
for (int i = 0; i < len; i++) {
int pos = i * 2;
result[i] = (byte) (HEX_NUMS_STR.indexOf(hexChars[pos]) << 4 | HEX_NUMS_STR.indexOf(hexChars[pos + 1]));
}
return result;
}
@SuppressWarnings("unused")
private static char[] base64EncodeChars = new char[]{'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',
'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1',
'2', '3', '4', '5', '6', '7', '8', '9', '+', '/',};
private static byte[] base64DecodeChars = new byte[]{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4,
5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26,
27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1,
-1, -1, -1};
public byte[] decode(String str) {
byte[] data = str.getBytes();
int len = data.length;
ByteArrayOutputStream buf = new ByteArrayOutputStream(len);
int i = 0;
int b1, b2, b3, b4;
while (i < len) {
do {
b1 = base64DecodeChars[data[i++]];
} while (i < len && b1 == -1);
if (b1 == -1) {
break;
}
do {
b2 = base64DecodeChars[data[i++]];
} while (i < len && b2 == -1);
if (b2 == -1) {
break;
}
buf.write((b1 << 2) | ((b2 & 0x30) >>> 4));
do {
b3 = data[i++];
if (b3 == 61) {
return buf.toByteArray();
}
b3 = base64DecodeChars[b3];
} while (i < len && b3 == -1);
if (b3 == -1) {
break;
}
buf.write(((b2 & 0x0f) << 4) | ((b3 & 0x3c) >>> 2));
do {
b4 = data[i++];
if (b4 == 61) {
return buf.toByteArray();
}
b4 = base64DecodeChars[b4];
} while (i < len && b4 == -1);
if (b4 == -1) {
break;
}
buf.write(((b3 & 0x03) << 6) | b4);
}
return buf.toByteArray();
}
/**
* 设置账户加密规则 （用户名 + "|" + 密码 + "|" + 秘钥）
*
* @param loginName 登录名
* @param passWord 密码
* @author lx
* @since 2017-5-10 15:49:55
*/
public static String encodeAccPwd(String loginName, String passWord) {
return GetMD5By32(loginName + "|" + passWord + "|" + KEY_ACCPWD_CRYPT);
}
public static void main(String[] args) {
System.out.println(encodeAccPwd("md", "123456"));
// MD5Util md5Util = new MD5Util();
// System.out.println(md5Util.GetMD5By32("XMNSHA9C8834李柯"));
// System.out.println(md5Util.GetMD5By16("XMNSHA9C8834李柯"));
// System.out.println(md5Util.ValidMD5By16("like","FCD6CEE38031673FBAB59185F8C5B73ACFC30C19CB07BE85F1AA2E56"));
// System.out.println(md5Util.ValidMD5By16("like","C7E3F980239BFCAD5DA2906156D9D475456901C465D87B827A49511D"));
// System.out.println(md5Util.ValidMD5By16("like","3CFE3248A7E4DD1EA5FB91C0837122A645D4699BF2A12F808B525D56"));
// System.out.println(md5Util.ValidMD5By16("like","E44D5DD6361E6C53189251AF823CE0043077F16D6A2EE6F088871F7B"));
// System.out.println(md5Util.ValidMD5By16("like","4506AE25426B03C05DE7BC4BA1F9B6D37F5E699437C6CC0DE647AEA0"));
// System.out.println(md5Util.ValidMD5By16("like","7D532CAA891217639C0D2D4D55BFB7FC574B6F2BF189563D172910D7"));
}
}
