• JAVA实现AES的加密和解密算法


    JAVA实现AES的加密和解密算法 加密模式为 AES-128-CBC

     1 import javax.crypto.Cipher;
     2 import javax.crypto.spec.IvParameterSpec;
     3 import javax.crypto.spec.SecretKeySpec;
     4 
     5 import sun.misc.BASE64Decoder;
     6 import sun.misc.BASE64Encoder;
     7 
     8 /**AES 是一种可逆加密算法,对用户的敏感信息加密处理
     9 * 对原始数据进行AES加密后,在进行Base64编码转化;
    10 */
    11 public class AESOperator {
    12 /*
    13 * 加密用的Key 可以用26个字母和数字组成
    14 * 此处使用AES-128-CBC加密模式,key需要为16位。
    15 */
    16 private String sKey=”0123456789abcdef”;
    17 private String ivParameter=”0123456789abcdef”;
    18 private static AESOperator instance=null;
    19 private AESOperator(){
    20 
    21 }
    22 public static AESOperator getInstance(){
    23 if (instance==null)
    24 instance= new AESOperator();
    25 return instance;
    26 }
    27 // 加密
    28 public String encrypt(String sSrc) throws Exception {
    29 Cipher cipher = Cipher.getInstance(“AES/CBC/PKCS5Padding”);
    30 byte[] raw = sKey.getBytes();
    31 SecretKeySpec skeySpec = new SecretKeySpec(raw, “AES”);
    32 IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());//使用CBC模式,需要一个向量iv,可增加加密算法的强度
    33 cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
    34 byte[] encrypted = cipher.doFinal(sSrc.getBytes(“utf-8″));
    35 return new BASE64Encoder().encode(encrypted);//此处使用BASE64做转码。
    36 }
    37 
    38 // 解密
    39 public String decrypt(String sSrc) throws Exception {
    40 try {
    41 byte[] raw = sKey.getBytes(“ASCII”);
    42 SecretKeySpec skeySpec = new SecretKeySpec(raw, “AES”);
    43 Cipher cipher = Cipher.getInstance(“AES/CBC/PKCS5Padding”);
    44 IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());
    45 cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
    46 byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);//先用base64解密
    47 byte[] original = cipher.doFinal(encrypted1);
    48 String originalString = new String(original,”utf-8″);
    49 return originalString;
    50 } catch (Exception ex) {
    51 return null;
    52 }
    53 }
    54 
    55 public static void main(String[] args) throws Exception {
    56 // 需要加密的字串
    57 String cSrc = “我来自www.xxxx.com”;
    58 System.out.println(cSrc);
    59 // 加密
    60 long lStart = System.currentTimeMillis();
    61 String enString = AESOperator.getInstance().encrypt(cSrc);
    62 System.out.println(“加密后的字串是:” + enString);
    63 
    64 long lUseTime = System.currentTimeMillis() – lStart;
    65 System.out.println(“加密耗时:” + lUseTime + “毫秒”);
    66 // 解密
    67 lStart = System.currentTimeMillis();
    68 String DeString = AESOperator.getInstance().decrypt(enString);
    69 System.out.println(“解密后的字串是:” + DeString);
    70 lUseTime = System.currentTimeMillis() – lStart;
    71 System.out.println(“解密耗时:” + lUseTime + “毫秒”);
    72 }
    73 }
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  • 原文地址:https://www.cnblogs.com/wdpnodecodes/p/7847355.html
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