1、参考
2、html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<title>AES文件加密 前端js后端Java解决方案</title>
</head>
<h1>AES</h1>
<div>
<input type="file">
</div>
<body></body>
<script src="../script/jq/jquery-2.1.1.min.js"></script>
<script src="./crypto-js-4.2.0/crypto-js.js"></script>
<script>
$(function () {
addEventListener();
});
function addEventListener() {
let input = document.querySelector('input');
input.addEventListener('change', function (e) {
let file = e.target.files[0];
let reader = new FileReader()
reader.readAsArrayBuffer(file); //readAsText(file,encoding)
reader.onload = async (e) => {
let bytes01 = e.target.result;
console.log("====bytes01", bytes01);
let dataStr = encrypt_bytes(bytes01);
save(dataStr, file);
}
})
}
function encrypt_bytes(bytes) {
let keyHex = CryptoJS.enc.Utf8.parse("123456789_123456");
let bytes02 = CryptoJS.lib.WordArray.create(bytes);
let encrypted = CryptoJS.AES.encrypt(bytes02, keyHex, {
mode: CryptoJS.mode.ECB,
padding: CryptoJS.pad.Pkcs7
});
console.log("====encrypted", encrypted);
let dataStr = encrypted.toString(); //base64编码字符串
console.log("====dataStr", dataStr);
return dataStr;
}
function save(dataStr, file) {
let blob2 = new Blob([dataStr], { type: file.type });
// 创建一个URL对象
let url = URL.createObjectURL(blob2);
// 创建一个a标签并设置下载属性
let a = document.createElement("a");
a.href = url;
a.download = "hello.txt";
// 模拟点击a标签来下载文件
a.click();
// 释放URL对象
URL.revokeObjectURL(url);
}
</script>
</html>
3、java
import cn.hutool.core.io.FileUtil;
import org.jeecg.common.util.encryption.AesUtil;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.security.Security;
import java.util.Base64;
public class Test05_Cipher {
private static String path = "C:\\Users\\xxxxx\\Downloads\\hello (40).txt";
public static void main(String[] args) throws Exception {
byte[] bytes01 = FileUtil.readBytes(path);
byte[] decodedBytes = Base64.getDecoder().decode(bytes01);
byte[] decrypt = AesUtil.decrypt(decodedBytes);
String a11 = new String(decrypt, StandardCharsets.UTF_8);
System.out.println(a11);
}
}
AesUtil
import org.apache.shiro.codec.Base64;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
public class AesUtil {
private static final String secret_key = "123456789_123456";
private static final String cipher_algorithm = "AES/ECB/PKCS5Padding";
public static void main(String args[]) throws Exception {
{
String a1 = "Cipher在使用时需以参数方式指定transformation";
byte[] encrypt = encrypt(a1.getBytes(StandardCharsets.UTF_8));
byte[] decrypt = decrypt(encrypt);
System.out.printf("===== \n\t%s \n\t%s%n", a1, new String(decrypt));
}
{
String b2 = "transformation的格式为algorithm/mode/padding";
String encrypt = encryptToBase64(b2);
String decrypt = decryptByBase64(encrypt);
System.out.printf("===== \n\t%s \n\t%s%n", b2, decrypt);
}
}
public static String encryptToBase64(String data) {
try {
byte[] bytes = encrypt(data.getBytes(StandardCharsets.UTF_8));
return java.util.Base64.getEncoder().encodeToString(bytes);
} catch (Exception e) {
return data;
}
}
public static String decryptByBase64(String base64) {
try {
byte[] decode_bytes = java.util.Base64.getDecoder().decode(base64);
byte[] decrypt_bytes = decrypt(decode_bytes);
return new String(decrypt_bytes, StandardCharsets.UTF_8);
} catch (Exception e) {
return base64;
}
}
public static byte[] encrypt(byte[] bytes) throws Exception {
return doFinal(bytes, Cipher.ENCRYPT_MODE);
}
public static byte[] decrypt(byte[] bytes) throws Exception {
return doFinal(bytes, Cipher.DECRYPT_MODE);
}
public static byte[] doFinal(byte[] bytes, int decryptMode) throws Exception {
SecretKeySpec secretKey = new SecretKeySpec(secret_key.getBytes(), "AES");
Cipher cipher = Cipher.getInstance(cipher_algorithm);
cipher.init(decryptMode, secretKey);
return cipher.doFinal(bytes);
}
}
