Aes加密和Des加密
Aes加密工具类
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class AESUtil {
public static String urlSafeEncode(String str){
str = str.replace('/', '_').replace('+', '-');
int len = str.length();
if (str.charAt(len - 2) == '=') {
str = str.substring(0, len - 2);
} else if (str.charAt(len - 1) == '=') {
str = str.substring(0, len - 1);
}
return str;
}
public static String urlSafeDecode(String str){
str = str.replace('_', '/').replace('-', '+');
int len = str.length() % 3;
if (len == 1) {
str += "==";
} else if (len == 2) {
str += "==";
}
return str;
}
public static String encrypt(String sSrc, String sKey) throws Exception {
if (sKey == null) {
System.out.print("Key为空null");
return null;
}
// 判断Key是否为16位
if (sKey.length() != 16) {
System.out.print("Key长度不是16位");
return null;
}
byte[] raw = sKey.getBytes();
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");//"算法/模式/补码方式"
IvParameterSpec iv = new IvParameterSpec(sKey.getBytes());//使用CBC模式，需要一个向量iv，可增加加密算法的强度
cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
byte[] srawt = sSrc.getBytes("utf-8");
int len = srawt.length;
/* 计算补0后的长度 */
while(len % 16 != 0) len ++;
byte[] sraw = new byte[len];
/* 在最后补0 */
for (int i = 0; i < len; ++i) {
if (i < srawt.length) {
sraw[i] = srawt[i];
} else {
sraw[i] = 0;
}
}
byte[] encrypted = cipher.doFinal(sraw);
return urlSafeEncode(Base64.encodeBase64String(encrypted));
}
// 解密
public static String decrypt(String sSrc, String sKey) throws Exception {
try {
// 判断Key是否正确
if (sKey == null) {
System.out.print("Key为空null");
return null;
}
// 判断Key是否为16位
if (sKey.length() != 16) {
System.out.print("Key长度不是16位");
return null;
}
sSrc = urlSafeDecode(sSrc);
byte[] raw = sKey.getBytes();
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
IvParameterSpec iv = new IvParameterSpec(sKey.getBytes());
cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
byte[] encrypted1 = Base64.decodeBase64(sSrc);//先用base64解密
try {
byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original,"utf-8");
System.out.println(originalString);
return originalString.trim();
} catch (Exception e) {
System.out.println(e.toString());
return null;
}
} catch (Exception ex) {
System.out.println(ex.toString());
return null;
}
}
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
String key = "eo9klprmiowqe0jd0001";
// String text1 = "{\"ts\":\"1343961025\",\"uid\":\"xu31\",\"email\":\"[email protected]\",\"name\":\"张三\",\"companyName\":\"xxx科技公司\",\"phone\":\"13511028285\"}";
// String text2 = "007;[email protected];1234;1";
// String miwen = encrypt(text2, key);
// System.out.println(miwen);
String mingwen = decrypt("7OhAQLH+ZGj5DtG66Imcyyhdx7iKfnS04upZ6fb7mvRZdAtUTfcNa8mdh4smI38C0001", key);
System.out.println(mingwen);
}
}
Des工具类
import java.io.IOException;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import org.apache.commons.codec.binary.Base64;
public class DesUtil {
private final static String DES = "DES";
public static void main(String[] args) throws Exception {
String data = "";
String key = "zhoujl*&^%$#@!";
System.err.println(encrypt(data, key));
System.err.println(decrypt(encrypt(data, key), key));
}
/**
* Description 根据键值进行加密
* @param data
* @param key 加密键byte数组
* @return
* @throws Exception
*/
public static String encrypt(String data, String key) throws Exception {
byte[] bt = encrypt(data.getBytes(), key.getBytes());
String strs = Base64.encodeBase64String(bt);
return strs;
}
/**
* Description 根据键值进行解密
* @param data
* @param key 加密键byte数组
* @return
* @throws IOException
* @throws Exception
*/
public static String decrypt(String data, String key) throws IOException,
Exception {
if (data == null)
return null;
byte[] buf = Base64.decodeBase64(data);
byte[] bt = decrypt(buf,key.getBytes());
return new String(bt);
}
/**
* Description 根据键值进行加密
* @param data
* @param key 加密键byte数组
* @return
* @throws Exception
*/
private static byte[] encrypt(byte[] data, byte[] key) throws Exception {
// 生成一个可信任的随机数源
SecureRandom sr = new SecureRandom();
// 从原始密钥数据创建DESKeySpec对象
DESKeySpec dks = new DESKeySpec(key);
// 创建一个密钥工厂，然后用它把DESKeySpec转换成SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
// Cipher对象实际完成加密操作
Cipher cipher = Cipher.getInstance(DES);
// 用密钥初始化Cipher对象
cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
return cipher.doFinal(data);
}
/**
* Description 根据键值进行解密
* @param data
* @param key 加密键byte数组
* @return
* @throws Exception
*/
private static byte[] decrypt(byte[] data, byte[] key) throws Exception {
// 生成一个可信任的随机数源
SecureRandom sr = new SecureRandom();
// 从原始密钥数据创建DESKeySpec对象
DESKeySpec dks = new DESKeySpec(key);
// 创建一个密钥工厂，然后用它把DESKeySpec转换成SecretKey对象
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
SecretKey securekey = keyFactory.generateSecret(dks);
// Cipher对象实际完成解密操作
Cipher cipher = Cipher.getInstance(DES);
// 用密钥初始化Cipher对象
cipher.init(Cipher.DECRYPT_MODE, securekey, sr);
return cipher.doFinal(data);
}
}