一、AES、DES、TripleDES
代码语言：javascript
复制package xxx.common.util;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.SecretKeySpec;
import java.io.UnsupportedEncodingException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.util.Base64;
/**
* Created by windwant on 2016/12/13.
*/
public class EncryptUtil {
private static final Logger logger = LoggerFactory.getLogger(EncryptUtil.class);
private static final String DEFAULT_CHARSET = "UTF-8";
private static final String EMPTY_STR = "";
private static final int AES_KEY_SIZE = 16;//256/192/128~32/24/16
public static void main(String[] args) {
String tempkey = "!@#$%^&*()_ ";
String ming = "at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_77]";
long begin = System.currentTimeMillis();
for (int i = 0; i < 100000; i ) {
String en = tripleDesEncrypt(ming, tempkey);
String den = tripleDesDecrypt(en, tempkey);
}
long end = System.currentTimeMillis();
System.out.println("TripleDES: " (end - begin));
System.out.println("TripleDES: " (end - begin)/100000.0);
begin = System.currentTimeMillis();
for (int i = 0; i < 100000; i ) {
String en = desEncrypt(ming, tempkey);
String den = desDecrypt(en, tempkey);
}
end = System.currentTimeMillis();
System.out.println("DES: " (end - begin));
System.out.println("DES: " (end - begin)/100000.0);
begin = System.currentTimeMillis();
for (int i = 0; i < 100000; i ) {
String en = aesEncrypt(ming, tempkey);
String den = aesDecrypt(en, tempkey);
}
end = System.currentTimeMillis();
System.out.println("AES: " (end - begin));
System.out.println("AES: " (end - begin)/100000.0);
/*
100000次
key: !@#$%^&*()_
src: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_77]
TripleDES: 3831
TripleDES: 0.03831
DES: 845
DES: 0.00845
AES: 888
AES: 0.00888
*/
}
private static final String ENCRYPT = "AES";
private static final String CIPHER = "AES/CBC/PKCS5Padding";
/**
* AES加密
* @param key 加密密钥
* @param src 加密内容
* @return 返回BASE64密文
*/
public static final String aesEncrypt(String src, String key) {
if(key == null || src == null){
return EMPTY_STR;
}
try {
byte[] bs = getAESResult(key, src.getBytes(DEFAULT_CHARSET), Cipher.ENCRYPT_MODE);
if (bs != null) {
return Base64.getEncoder().encodeToString(bs);
}
} catch (Exception e) {
logger.error(e.getMessage());
}
return src;
}
/**
* AES解密
* @param key 解密密钥
* @param src 解密内容
* @return 明文
*/
public static final String aesDecrypt(String src, String key) {
if(key == null || src == null){
return EMPTY_STR;
}
try {
byte[] bs = getAESResult(key, Base64.getDecoder().decode(src.getBytes(DEFAULT_CHARSET)), Cipher.DECRYPT_MODE);
if (bs != null) {
return new String(bs, DEFAULT_CHARSET);
}
} catch (Exception e) {
e.printStackTrace();
logger.error(e.getMessage());
}
return src;
}
/**
* AES加解密结果
* @param key 密钥
* @param textBytes 明文 密文 字节数组
* @param encryptMode 加密 解密
* @return
*/
private static byte[] getAESResult(String key, byte[] textBytes, final int encryptMode)
throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException,
IllegalBlockSizeException, InvalidAlgorithmParameterException, UnsupportedEncodingException {
Key newKey = new SecretKeySpec(buildCLenKey(key, AES_KEY_SIZE), ENCRYPT);
Cipher cipher = Cipher.getInstance(ENCRYPT);
cipher.init(encryptMode, newKey, new SecureRandom());
return cipher.doFinal(textBytes);
}
//定义加密算法，有DES、DESede(3DES)
private static final String ALGORITHM = "DESede";
// 算法名称/加密模式/填充方式
private static final String CIPHER_ALGORITHM_ECB = "DESede/ECB/PKCS5Padding";
/**
* TripleDES加密方法
* @param src
* @param key
* @return BASE64
*/
public static final String tripleDesEncrypt(String src, String key) {
if(key == null || src == null){
return EMPTY_STR;
}
try {
byte[] des = getTripleDESResult(key, src.getBytes(), Cipher.ENCRYPT_MODE);
if(des != null) {
return Base64.getEncoder().encodeToString(des);
}
} catch (Exception e) {
logger.error(e.getMessage());
}
return src;
}
/**
* TripleDES解密函数
* @param src 密文的字节数组
* @param key 密钥
* @return String 明文
*/
public static final String tripleDesDecrypt(String src, String key) {
if(key == null || src == null){
return EMPTY_STR;
}
try {
byte[] srcb = Base64.getDecoder().decode(src);
byte[] des = getTripleDESResult(key, srcb, Cipher.DECRYPT_MODE);
return new String(des, DEFAULT_CHARSET);
} catch (Exception e) {
logger.error(e.getMessage());
}
return src;
}
/**
* TripleDES加解密结果
* @param key 密钥
* @param textBytes 明文 密文 字节数组
* @param encryptMode 加密 解密
* @return
*/
private static byte[] getTripleDESResult(String key, byte[] textBytes, final int encryptMode)
throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException,
IllegalBlockSizeException, InvalidAlgorithmParameterException, UnsupportedEncodingException {
Key newKey = new SecretKeySpec(buildCLenKey(key, 24), ALGORITHM);
Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM_ECB);
cipher.init(encryptMode, newKey, new SecureRandom());
return cipher.doFinal(textBytes);
}
/**
* 根据字符串生成密钥字节数组
* @param keyStr 密钥字符串
* @param lgn 密钥长度
* @return 长度密钥字节数组
* @throws UnsupportedEncodingException
*/
private static byte[] buildCLenKey(String keyStr, int lgn) throws UnsupportedEncodingException {
byte[] key = new byte[lgn]; //声明一个24位的字节数组，默认里面都是0
byte[] temp = keyStr.getBytes("UTF-8"); //将字符串转成字节数组
///执行数组拷贝
if (key.length > temp.length) {
//如果temp不够24位，则拷贝temp数组整个长度的内容到key数组中
System.arraycopy(temp, 0, key, 0, temp.length);
} else {
//如果temp大于24位，则拷贝temp数组24个长度的内容到key数组中
System.arraycopy(temp, 0, key, 0, key.length);
}
return key;
}
private static final String DES_ALGORITHM = "DES";
public static final String DES_CIPHER_ALGORITHM = "DES";
/**
* DES 加密方法
* @param src
* @param key
* @return BASE64
*/
public static final String desEncrypt(String src, String key) {
if(key == null || src == null){
return EMPTY_STR;
}
try {
byte[] des = getDESResult(key, src.getBytes(), Cipher.ENCRYPT_MODE);
if(des != null) {
return Base64.getEncoder().encodeToString(des);
}
} catch (Exception e) {
logger.error(e.getMessage());
}
return src;
}
/**
* DES解密函数
* @param src 密文的字节数组
* @param key 密钥
* @return String 明文
*/
public static final String desDecrypt(String src, String key) {
if(key == null || src == null){
return EMPTY_STR;
}
try {
byte[] srcb = Base64.getDecoder().decode(src);
byte[] des = getDESResult(key, srcb, Cipher.DECRYPT_MODE);
return new String(des, DEFAULT_CHARSET);
} catch (Exception e) {
logger.error(e.getMessage());
}
return src;
}
private static byte[] getDESResult(String key, byte[] textBytes, final int encryptMode)
throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException,
IllegalBlockSizeException, InvalidAlgorithmParameterException, UnsupportedEncodingException {
Key newKey = new SecretKeySpec(buildCLenKey(key, 8), DES_ALGORITHM);
Cipher cipher = Cipher.getInstance(DES_CIPHER_ALGORITHM);
cipher.init(encryptMode, newKey, new SecureRandom());
return cipher.doFinal(textBytes);
}
}
二、散列MD5、SHA
代码语言：javascript
复制package xxx.common.util;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
* 消息摘要 散列
* Created by windwant on 2016/12/14.
*/
public class MessageDigestUtil {
public static void main(String[] args) {
System.out.println(md5("lilei"));
System.out.println(sha("lilei"));
}
private static String md5(String data){
try {
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(data.getBytes());
return new BigInteger(1, md.digest()).toString(16);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return null;
}
private static String sha(String data){
try {
MessageDigest md = MessageDigest.getInstance("SHA");
md.update(data.getBytes());
return new BigInteger(1, md.digest()).toString(16);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return null;
}
}
