java实现AES可逆加密算法 java实现AES可逆加密算法
风过留痕丶 人气:0package com.hdu.encode; import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder; /** * AES 是一种可逆加密算法,对用户的敏感信息加密处理 对原始数据进行AES加密后,在进行Base64编码转化; */ public class AESOperator { /* * 加密用的Key 可以用26个字母和数字组成 此处使用AES-128-CBC加密模式,key需要为16位。 */ // a0b891c2d563e4f7 private String sKey = "abcdef0123456789"; private String ivParameter = "0123456789abcdef"; private static AESOperator instance = null; private AESOperator() { } public static AESOperator getInstance() { if (instance == null) instance = new AESOperator(); return instance; } // 加密 public String encrypt(String sSrc){ String result = ""; try { Cipher cipher; cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); byte[] raw = sKey.getBytes(); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); 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 cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv); byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8")); result = new BASE64Encoder().encode(encrypted); } catch (Exception e) { e.printStackTrace(); } // 此处使用BASE64做转码。 return result; } // 解密 public String decrypt(String sSrc){ try { byte[] raw = sKey.getBytes("ASCII"); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes()); cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv); byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);// 先用base64解密 byte[] original = cipher.doFinal(encrypted1); String originalString = new String(original, "utf-8"); return originalString; } catch (Exception ex) { ex.printStackTrace(); return null; } } public static void main(String[] args){ // 需要加密的字串 String cSrc = "测试"; System.out.println(cSrc + " 长度为" + cSrc.length()); // 加密 long lStart = System.currentTimeMillis(); String enString = AESOperator.getInstance().encrypt(cSrc); System.out.println("加密后的字串是:" + enString + "长度为" + enString.length()); long lUseTime = System.currentTimeMillis() - lStart; System.out.println("加密耗时:" + lUseTime + "毫秒"); // 解密 lStart = System.currentTimeMillis(); String DeString = AESOperator.getInstance().decrypt(enString); 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"); } }
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