SpringBoot安全策略开发之集成数据传输加密
目录
前言
生成DESKey
生成RSA密钥对
前端DES加密
前端RSA加密
后端RSA解密
后端DES解密
后端自定义拦截器
前言近期在对开发框架安全策略方面进行升级优化，提供一些通用场景的解决方案，本文针对前后端数据传输加密进行简单的分享，处理流程设计如下图所示，本加密方法对原有项目兼容性较好，只需要更换封装好的加密Ajax请求方法，后端统一拦截判断是否需要解密即可
生成的DES加密密钥一定是8的整数倍的位数
function getRandomStr() {
let str = ""
let array = [
"0",
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"a",
"b",
"c",
"d",
"e",
"f",
"g",
"h",
"i",
"j",
"k",
"l",
"m",
"n",
"o",
"p",
"q",
"r",
"s",
"t",
"u",
"v",
"w",
"x",
"y",
"z",
"A",
"B",
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z",
];
for (let i = 0; i < 8; i++) {
str += array[Math.round(Math.random() * (array.length - 1))];
}
return str;
}
生成RSA密钥对
RSA密钥对有很多种格式，因为需要和前端算法库互联互通，这里选择的是1024位，Padding方式为PKSC1
public static Map<String, String> createKeysPKSC1(int keySize) {
// map装载公钥和私钥
Map<String, String> keyPairMap = new HashMap<String, String>();
try {
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
SecureRandom random = new SecureRandom();
KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA", "BC");
generator.initialize(keySize, random);
KeyPair keyPair = generator.generateKeyPair();
RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
String publicKeyStr = new String(Base64.encodeBase64(publicKey.getEncoded()));
String privateKeyStr = new String(Base64.encodeBase64(privateKey.getEncoded()));
keyPairMap.put("publicKey", publicKeyStr);
keyPairMap.put("privateKey", privateKeyStr);
} catch (Exception e) {
e.printStackTrace();
}
// 返回map
return keyPairMap;
}
前端DES加密
引入crypto.js第三方库
function encryptByDES(message, key) {
var keyHex = CryptoJS.enc.Utf8.parse(key);
var encrypted = CryptoJS.DES.encrypt(message, keyHex, {
mode: CryptoJS.mode.ECB,
padding: CryptoJS.pad.Pkcs7
});
return encrypted.toString();
}
前端RSA加密
引入jsencrypt,js第三方库
function encryptByRSA(data, publicKey) {
var encryptor = new JSEncrypt()
encryptor.setPublicKey(publicKey)
return encryptor.encrypt(data);;
}
后端RSA解密
public static String decryptPKSC1(String data, String privateKeyStr) {
try {
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
Cipher cipher = Cipher.getInstance("RSA/None/PKCS1Padding", "BC");
RSAPrivateKey privateKey = getPrivateKeyPKSC1(privateKeyStr);
cipher.init(Cipher.DECRYPT_MODE, privateKey);
return new String(rsaSplitCodec(cipher, Cipher.DECRYPT_MODE, Base64.decodeBase64(data), privateKey.getModulus().bitLength()), CHARSET);
} catch (Exception e) {
throw new RuntimeException("解密字符串[" + data + "]时遇到异常", e);
}
}
后端DES解密
public static String decrypt(String data, String key) throws IOException,
Exception {
if (data == null)
return null;
BASE64Decoder decoder = new BASE64Decoder();
byte[] buf = decoder.decodeBuffer(data);
byte[] bt = decrypt(buf, key.getBytes("UTF-8"));
return new String(bt, "UTF-8");
}
后端自定义拦截器
public class XSSFilter implements Filter, Ordered {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void destroy() {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
String contentType = request.getContentType();
if (StringUtils.isNotBlank(contentType) && contentType.contains("application/json")) {
XSSBodyRequestWrapper xssBodyRequestWrapper = new XSSBodyRequestWrapper((HttpServletRequest) request);
chain.doFilter(xssBodyRequestWrapper, response);
} else {
chain.doFilter(request, response);
}
}
@Override
public int getOrder() {
return 9;
}
}
public class XSSBodyRequestWrapper extends HttpServletRequestWrapper {
private String body;
public XSSBodyRequestWrapper(HttpServletRequest request) {
super(request);
try{
body = XSSScriptUtil.handleString(CommonUtil.getBodyString(request));
String encrypt = request.getHeader("encrypt");
if (!StringUtil.isEmpty(encrypt)) {
String privateKey = RSAEncryptUtil.getSystemDefaultRSAPrivateKey();
String desEncryptStr = RSAEncryptUtil.decryptPKSC1(encrypt, privateKey);
JSONObject obj = JSONObject.parseObject(body);
String encryptParam = obj.getString("encryptParam");
body = DESEncryptUtil.decrypt(encryptParam, desEncryptStr);
}
}catch (Exception e){
e.printStackTrace();
}
}
@Override
public BufferedReader getReader() throws IOException {
return new BufferedReader(new InputStreamReader(getInputStream()));
}
@Override
public ServletInputStream getInputStream() throws IOException {
final ByteArrayInputStream bais = new ByteArrayInputStream(body.getBytes(Charset.forName("UTF-8")));
return new ServletInputStream() {
@Override
public int read() throws IOException {
return bais.read();
}
@Override
public boolean isFinished() {
return false;
}
@Override
public boolean isReady() {
return false;
}
@Override
public void setReadListener(ReadListener readListener) {
}
};
}
}
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