package com.zhongzhi.utils; import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import org.apache.commons.codec.binary.Base64; /** * @Classname ZzSecurityHelper * @Description TODO * @Date 2019/6/24 16:50 * @Created by whd */ public class ZzSecurityHelper { /* * 加密用的Key 可以用26个字母和数字组成 使用AES-128-CBC加密模式，key需要为16位。 */ private static final String key="hj7x89H$yuBI0456"; private static final String iv ="NIfb&95GUY86Gfgh"; /** * @author miracle.qu * @Description AES算法加密明文 * @param data 明文 * @param key 密钥，长度16 * @param iv 偏移量，长度16 * @return 密文 */ public static String encryptAES(String data) throws Exception { try { Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding"); int blockSize = cipher.getBlockSize(); byte[] dataBytes = data.getBytes(); int plaintextLength = dataBytes.length; if (plaintextLength % blockSize != 0) { plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize)); } byte[] plaintext = new byte[plaintextLength]; System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length); SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES"); IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes()); // 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, keyspec, ivspec); byte[] encrypted = cipher.doFinal(plaintext); return ZzSecurityHelper.encode(encrypted).trim(); // BASE64做转码。 } catch (Exception e) { e.printStackTrace(); return null; } } /** * @author miracle.qu * @Description AES算法解密密文 * @param data 密文 * @param key 密钥，长度16 * @param iv 偏移量，长度16 * @return 明文 */ public static String decryptAES(String data) throws Exception { try { byte[] encrypted1 = ZzSecurityHelper.decode(data);//先用base64解密 Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding"); SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES"); IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes()); cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec); byte[] original = cipher.doFinal(encrypted1); String originalString = new String(original); return originalString.trim(); } catch (Exception e) { e.printStackTrace(); return null; } } /** * 编码 * @param byteArray * @return */ public static String encode(byte[] byteArray) { return new String(new Base64().encode(byteArray)); } /** * 解码 * @param base64EncodedString * @return */ public static byte[] decode(String base64EncodedString) { return new Base64().decode(base64EncodedString); } }
参考文章：
https://blog.csdn.net/DamonREN/article/details/87601165
https://blog.csdn.net/xy371661665/article/details/86423762
https://blog.csdn.net/TurboAnho/article/details/98611138
https://my.oschina.net/u/3784129/blog/3066112