AES-128-CBC加密模式.doc

package com.bjy.util;import javax.crypto.Cipher;import javax.crypto.spec.IvParameterSpec;import javax.crypto.spec.SecretKeySpec;import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;public class Encryption / 加密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/PKCS5Padding);/ 算法/模式/补码方式IvParameterSpec iv = new IvParameterSpec(0102030405060708.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();return new BASE64Encoder().encode(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 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;byte raw = sKey.getBytes(ASCII);SecretKeySpec skeySpec = new SecretKeySpec(raw, AES);Cipher cipher = Cipher.getInstance(AES/CBC/PKCS5Padding);IvParameterSpec iv = new IvParameterSpec(0102030405060708.getBytes();cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);byte encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);/ 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 /* * 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 * 此处使用AES-128-CBC加密模式，key需要为16位。 */String cKey = 1234567890123456;/ 需要加密的字串String cSrc = Email : ;System.out.println(cSrc);/ 加密long lStart = System.currentTimeMillis();String enString = Encryption.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 = Encryption.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);float