[Android Pro] AES加密

package com.secufity.aes;

import java.util.UUID;

import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import com.secufity.db.Base64; /** * * @author wfung_kwok * */ public class AES { static String e = "9238513401340235"; // 加密 public static String Encrypt(String src, String key) throws Exception { if (key == null) { System.out.print("Key为空null"); return null; } // 判断Key是否为16位 if (key.length() != 16) { System.out.print("Key长度不是16位"); return null; } byte[] raw = key.getBytes(); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");// "算法/模式/补码方式"0102030405060708 IvParameterSpec iv = new IvParameterSpec(e.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(src.getBytes()); return Base64.encodeBytes(encrypted); // 此处使用BASE64做转码功能，同时能起到2次加密的作用。  } // 解密 public static String Decrypt(String src, String key) throws Exception { try { // 判断Key是否正确 if (key == null) { System.out.print("Key为空null"); return null; } // 判断Key是否为16位 if (key.length() != 16) { System.out.print("Key长度不是16位"); return null; } byte[] raw = key.getBytes("ASCII"); SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding"); IvParameterSpec iv = new IvParameterSpec(e.getBytes()); cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv); byte[] encrypted1 = Base64.decode(src);// 先用base64解密 try { byte[] original = cipher.doFinal(encrypted1); String originalString = new String(original); return originalString; } catch (Exception e) { System.out.println(e.toString()); return null; } } catch (Exception ex) { System.out.println(ex.toString()); return null; } } public static void main(String[] args) throws Exception { String key = UUID.randomUUID().toString().substring(0, 16); String src = "Email : wfung_kwok@xxx.com"; System.out.println(src); // 加密 long start = System.currentTimeMillis(); String enString = AES.Encrypt(src, key); System.out.println("加密后的字串是：" + enString); long useTime = System.currentTimeMillis() - start; System.out.println("加密耗时：" + useTime + "毫秒"); // 解密 start = System.currentTimeMillis(); String DeString = AES.Decrypt(enString, key); System.out.println("解密后的字串是：" + DeString); useTime = System.currentTimeMillis() - start; System.out.println("解密耗时：" + useTime + "毫秒"); } }

Email : wfung_kwok@xxx.com
加密后的字串是：Gkl3xEIHndI1W8CN9fKbvEM3Fzo9KJSfVvQPWRkH0WI=
加密耗时：234毫秒
解密后的字串是：Email : wfung_kwok@xxx.com
解密耗时：0毫秒