128 lines
3.0 KiB
Plaintext
128 lines
3.0 KiB
Plaintext
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/**
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* AES 128bit 加密解密工具类
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*/
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package com.nationalelectric.greenH5.utils;
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import javax.crypto.Cipher;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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import org.apache.commons.codec.binary.Base64;
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public class AesEncryptUtil {
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// 使用AES-128-CBC加密模式，key需要为16位,key和iv可以相同！
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public static final String KY2 = "greenh5java12345";
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public static final String IV = "greenh5java12345";
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/**
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* 加密方法
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*
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* @param data
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* 要加密的数据
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* @param key
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* 加密key
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* @param iv
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* 加密iv
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* @return 加密的结果
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* @throws Exception
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*/
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public static String encrypt(String data, String key, String iv) throws Exception {
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if (data == null || data.equals("")) {
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return null;
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}
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try {
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Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");// "<22>㷨/ģʽ/<2F><><EFBFBD>뷽ʽ"
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int blockSize = cipher.getBlockSize();
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byte[] dataBytes = data.getBytes();
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int plaintextLength = dataBytes.length;
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if (plaintextLength % blockSize != 0) {
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plaintextLength = plaintextLength + (blockSize - (plaintextLength % blockSize));
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}
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byte[] plaintext = new byte[plaintextLength];
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System.arraycopy(dataBytes, 0, plaintext, 0, dataBytes.length);
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SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
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IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
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cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
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byte[] encrypted = cipher.doFinal(plaintext);
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Base64 base64 = new Base64();
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encrypted = base64.encode(encrypted);
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return new String(encrypted, "UTF-8");
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} catch (Exception e) {
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return null;
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}
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}
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/**
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* 解密方法
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*
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* @param data
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* 要解密的数据
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* @param key
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* 解密key
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* @param iv
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* 解密iv
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* @return 解密的结果
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* @throws Exception
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*/
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public static String desEncrypt(String data, String key, String iv) throws Exception {
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if (data == null || data.trim().equals("")) {
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return null;
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}
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try {
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byte[] b = data.getBytes();
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Base64 base64 = new Base64();
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byte[] encrypted1 = base64.decode(b);
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Cipher cipher = Cipher.getInstance("AES/CBC/NoPadding");
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SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), "AES");
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IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
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cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
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byte[] original = cipher.doFinal(encrypted1);
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String originalString = new String(original, "UTF-8");
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return originalString;
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} catch (Exception e) {
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return null;
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}
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}
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/**
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* 使用默认的key和iv加密
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*
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* @param data
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* @return
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* @throws Exception
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*/
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public static String encrypt(String data) throws Exception {
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return encrypt(data, KY2, IV);
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}
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/**
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* 使用默认的key和iv解密
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*
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* @param data
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* @return
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* @throws Exception
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*/
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public static String desEncrypt(String data) throws Exception {
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return desEncrypt(data, KY2, IV);
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}
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// /**
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// * 测试
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// */
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// public static void main(String args[]) throws Exception {
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//
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// }
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}
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