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DES加密还没有AES严密:
package com.palic.pss.afcs.worldthrough.common.util;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import repack.com.thoughtworks.xstream.core.util.Base64Encoder;
/**
* AES加密解密
* @author
*
*/
public class AesUtils {
public static final String cKey= "assistant7654321";
/**
* 加密--把加密后的byte数组先进行二进制转16进制在进行base64编码
* @param sSrc
* @param sKey
* @return
* @throws Exception
*/
public static String encrypt(String sSrc, String sKey) throws Exception {
if (sKey == null) {
throw new IllegalArgumentException("Argument sKey is null.");
}
if (sKey.length() != 16) {
throw new IllegalArgumentException(
"Argument sKey'length is not 16.");
}
byte[] raw = sKey.getBytes("ASCII");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
byte[] encrypted = cipher.doFinal(sSrc.getBytes("UTF-8"));
String tempStr = parseByte2HexStr(encrypted);
Base64Encoder encoder = new Base64Encoder();
return encoder.encode(tempStr.getBytes("UTF-8"));
}
/**
*解密--先 进行base64解码,在进行16进制转为2进制然后再解码
* @param sSrc
* @param sKey
* @return
* @throws Exception
*/
public static String decrypt(String sSrc, String sKey) throws Exception {
if (sKey == null) {
throw new IllegalArgumentException("499");
}
if (sKey.length() != 16) {
throw new IllegalArgumentException("498");
}
byte[] raw = sKey.getBytes("ASCII");
SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.DECRYPT_MODE, skeySpec);
Base64Encoder encoder = new Base64Encoder();
byte[] encrypted1 = encoder.decode(sSrc);
String tempStr = new String(encrypted1, "utf-8");
encrypted1 = parseHexStr2Byte(tempStr);
byte[] original = cipher.doFinal(encrypted1);
String originalString = new String(original, "utf-8");
return originalString;
}
/**
* 将二进制转换成16进制
*
* @param buf
* @return
*/
public static String parseByte2HexStr(byte buf[]) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < buf.length; i++) {
String hex = Integer.toHexString(buf[i] & 0xFF);
if (hex.length() == 1) {
hex = '0' + hex;
}
sb.append(hex.toUpperCase());
}
return sb.toString();
}
/**
* 将16进制转换为二进制
*
* @param hexStr
* @return
*/
public static byte[] parseHexStr2Byte(String hexStr) {
if (hexStr.length() < 1)
return null;
byte[] result = new byte[hexStr.length() / 2];
for (int i = 0; i < hexStr.length() / 2; i++) {
int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);
int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2),
16);
result[i] = (byte) (high * 16 + low);
}
return result;
}
public static void main(String[] args) throws Exception {
/*
* 加密用的Key 可以用26个字母和数字组成,最好不要用保留字符,虽然不会错,至于怎么裁决,个人看情况而定
*/
String cKey = "assistant7654321";
// 需要加密的字串
String cSrc = "123456";
// 加密
long lStart = System.currentTimeMillis();
String enString = encrypt(cSrc, cKey);
System.out.println("加密后的字串是:" + enString);
long lUseTime = System.currentTimeMillis() - lStart;
System.out.println("加密耗时:" + lUseTime + "毫秒");
// 解密
lStart = System.currentTimeMillis();
String DeString = decrypt(enString, cKey);
System.out.println("解密后的字串是:" + DeString);
lUseTime = System.currentTimeMillis() - lStart;
System.out.println("解密耗时:" + lUseTime + "毫秒");
}
}