最近有一个加解密的需求，其实没有什么难度，但是实践过程中踩了很多坑，把踩坑过程分享出来。
1、前端JS加密
/** * 加密（需要先加载aes.min.js文件） * @param word * @returns {*} */ function aesminencrypt(word){ var _word = CryptoJS.enc.Utf8.parse(word),_key = CryptoJS.enc.Utf8.parse("ihaierForTodoKey"),_iv = CryptoJS.enc.Utf8.parse("ihaierForTodo_Iv"); var encrypted = CryptoJS.AES.encrypt(_word,_key,{ iv: _iv,mode: CryptoJS.mode.CBC,padding: CryptoJS.pad.Pkcs7 }); return encrypted.toString(); }
key：十六位作为密钥（前后端必须一致）
iv：十六位作为密钥偏移量（前后端必须一致）
算法：AES/CBC/PKCS7Padding
注意点：JAVA本身不支持PKCS7，只支持PKCS5，但是通过实验，两者即使不一样，也可以进行解密
2、后端JAVA解密
需要导入的jar包（版本没要求）：
org.apache.commons.codec.jar
org.apache.commons.lang.jar
package com.founder.mrp.util; import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.SecretKeySpec; import org.apache.commons.codec.binary.Base64; import org.apache.commons.lang.StringUtils; public class AesUtil { //密钥 (需要前端和后端保持一致)十六位作为密钥 private static final String KEY = "ihaierForTodoKey"; //密钥偏移量 (需要前端和后端保持一致)十六位作为密钥偏移量 private static final String IV = "ihaierForTodo_Iv"; //算法 private static final String ALGORITHMSTR = "AES/CBC/PKCS5Padding"; //SSO的TOKEN private static final String token = "4AaWABnPB5/1Z2EIEXwSfigudpiM4kzLkmIrKQPmS9w="; /** * base 64 decode * @param base64Code 待解码的base 64 code * @return 解码后的byte[] * @throws Exception */ public static byte[] base64Decode(String base64Code) throws Exception{ /**sun.misc.BASE64Decoder是java内部类，有时候会报错， * 用org.apache.commons.codec.binary.Base64替代，效果一样。 */ //Base64 base64 = new Base64(); //byte[] bytes = base64.decodeBase64(new String(base64Code).getBytes()); //new BASE64Decoder().decodeBuffer(base64Code); return StringUtils.isEmpty(base64Code) ? null : new Base64().decodeBase64(new String(base64Code).getBytes()); } /** * AES解密 * @param encryptBytes 待解密的byte[] * @return 解密后的String * @throws Exception */ public static String aesDecryptByBytes(byte[] encryptBytes) throws Exception { Cipher cipher = Cipher.getInstance(ALGORITHMSTR); byte[] temp = IV.getBytes("UTF-8"); IvParameterSpec iv = new IvParameterSpec(temp); cipher.init(Cipher.DECRYPT_MODE,new SecretKeySpec(KEY.getBytes(),"AES"),iv); byte[] decryptBytes = cipher.doFinal(encryptBytes); System.out.print(new String(decryptBytes)); return new String(decryptBytes); } /** * 将base 64 code AES解密 * @param encryptStr 待解密的base 64 code * @return 解密后的string * @throws Exception */ public static String aesDecrypt(String encryptStr) throws Exception { return StringUtils.isEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr)); } public static void main(String[] args) throws Exception { aesDecrypt(token); } }
密钥和密钥便宜量必须和前端一致
算法可以采用PKCS5（JAVA本身不支持PKCS7），如果想使用PKCS7，需要额外引入jar包。
附录：aes.min.js压缩文件
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