SpringBoot数据加解密
RSAUtil工具类：
//前端公钥
public static final String PUBLIC_KEY = "xxxxx";
// public static final String PUBLIC_KEY = "xxxxxxxx";
public static final String PRIVATE_KEY = "xxxxxxx";
//前端私钥
// public static final String PRIVATE_KEY = "xxxxxx";
// RSA最大加密明文大小
private static final int MAX_ENCRYPT_BLOCK = 117;
// RSA最大解密密文大小
private static final int MAX_DECRYPT_BLOCK = 128;
/**
* RAS非对称加密，随机生成密钥对
*
* @return 密钥对
*/
public static Map<String, String> genKeyPair() {
// KeyPairGenerator类用于生成公钥和私钥对，基于RSA算法生成对象
KeyPairGenerator keyPairGen = null;
try {
keyPairGen = KeyPairGenerator.getInstance("RSA");
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
// 初始化密钥对生成器，密钥大小为96-1024位
assert keyPairGen != null;
keyPairGen.initialize(1024, new SecureRandom());
// 生成一个密钥对，保存在keyPair中
KeyPair keyPair = keyPairGen.generateKeyPair();
RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate(); // 得到私钥
RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic(); // 得到公钥
// 将公钥和私钥保存到Map
Map<String, String> res = new HashMap<String, String>(2) {{
}};
String pub = new String(Base64.getEncoder().encodeToString(publicKey.getEncoded()));
String pri = new String(Base64.getEncoder().encodeToString((privateKey.getEncoded())));
System.out.println(pub);
System.out.println(pri);
return res;
}
/**
* RAS非对称加密: 公钥加密
*
* @param str 加密字符串
* @param publicKey 公钥
* @return 密文
*/
public static String encrypt(String str, String publicKey) {
//base64编码的公钥
byte[] decoded = Base64.getDecoder().decode(publicKey);
RSAPublicKey pubKey;
String outStr = null;
try {
pubKey = (RSAPublicKey) KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(decoded));
Cipher cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.ENCRYPT_MODE, pubKey);
// 分段加密
// URLEncoder编码解决中文乱码问题
byte[] data = URLEncoder.encode(str, "UTF-8").getBytes("UTF-8");
// 加密时超过117字节就报错。为此采用分段加密的办法来加密
byte[] enBytes = null;
for (int i = 0; i < data.length; i += MAX_ENCRYPT_BLOCK) {
// 注意要使用2的倍数，否则会出现加密后的内容再解密时为乱码
byte[] doFinal = cipher.doFinal(ArrayUtils.subarray(data, i, i + MAX_ENCRYPT_BLOCK));
enBytes = ArrayUtils.addAll(enBytes, doFinal);
}
outStr = Base64.getEncoder().encodeToString(enBytes);
} catch (InvalidKeySpecException | BadPaddingException | IllegalBlockSizeException | InvalidKeyException |
NoSuchPaddingException | NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
throw new RuntimeException(e);
}
//RSA加密
return outStr;
}
/**
* RSA私钥解密
*
* @param str 加密字符串
* @param privateKey 私钥
* @return 铭文
*/
public static String decrypt(String str, String privateKey) {
try {
str = str.replaceAll(" ","");
//base64编码的私钥
byte[] decoded = Base64.getDecoder().decode(privateKey);
RSAPrivateKey priKey;
//RSA解密
Cipher cipher;
String outStr = null;
priKey = (RSAPrivateKey) KeyFactory.getInstance("RSA").generatePrivate(new PKCS8EncodedKeySpec(decoded));
cipher = Cipher.getInstance("RSA");
cipher.init(Cipher.DECRYPT_MODE, priKey);
byte[] data = Base64.getDecoder().decode(str.getBytes("UTF-8"));
// 返回UTF-8编码的解密信息
int inputLen = data.length;
ByteArrayOutputStream out = new ByteArrayOutputStream();
int offSet = 0;
byte[] cache;
int i = 0;
// 对数据分段解密
while (inputLen - offSet > 0) {
if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
cache = cipher.doFinal(data, offSet, MAX_DECRYPT_BLOCK);
} else {
cache = cipher.doFinal(data, offSet, inputLen - offSet);
}
out.write(cache, 0, cache.length);
i++;
offSet = i * 128;
}
byte[] decryptedData = out.toByteArray();
out.close();
return URLDecoder.decode(new String(decryptedData, "UTF-8"), "UTF-8");
} catch (InvalidKeySpecException e) {
throw new RuntimeException(e);
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException(e);
} catch (NoSuchPaddingException e) {
throw new RuntimeException(e);
} catch (InvalidKeyException e) {
throw new RuntimeException(e);
} catch (IllegalBlockSizeException e) {
throw new RuntimeException(e);
} catch (BadPaddingException e) {
throw new RuntimeException(e);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static void main(String[] args) {
// genKeyPair();
String str = "jack";
// 加密后的数据
String encryptData = null;
try {
// 使用公钥加密
encryptData = encrypt(str ,PUBLIC_KEY);
System.out.println(encryptData);
} catch (Exception e) {
log.error("加密失败 {}", e);
}
// 解密后的数据
String decryptData = null;
try {
// 使用私钥解密
decryptData = decrypt(encryptData, PRIVATE_KEY);
System.out.println(decryptData);
} catch (Exception e) {
e.printStackTrace();
}
}
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定义解密注解
@Target(ElementType.PARAMETER)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface DecryptApi {
}
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在get请求上添加注解
@GetMapping("test")
public void test(@DecryptApi String username, @DecryptApi String password){
}
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定义参数解析器
public class AbsHandlerMethodArgumentResolver implements HandlerMethodArgumentResolver {
private Logger logger=LoggerFactory.getLogger(AbsHandlerMethodArgumentResolver.class);
@Override
public boolean supportsParameter(MethodParameter parameter) {
logger.info("正在调用执行:{}",parameter.getMember().getName());
return parameter.hasParameterAnnotation(DecryptApi.class);
}
@Override
public Object resolveArgument(MethodParameter methodParameter, ModelAndViewContainer mavContainer,
NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
logger.info("对用户请求进行解析");
Parameter parameter = methodParameter.getParameter();
HttpServletRequest request = webRequest.getNativeRequest(HttpServletRequest.class);
String data = request.getParameter(parameter.getName());
String decrypt = RSAUtil.decrypt(data, RSAUtil.PRIVATE_KEY);
return decrypt;
}
}
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注册参数解析器
@Configuration
public class AbsWebMvcConfigurerAdapter extends WebMvcConfigurationSupport {
@Override
public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {
super.addArgumentResolvers(argumentResolvers);
argumentResolvers.add(new AbsHandlerMethodArgumentResolver());
}
}
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前端传参：
curl --location '127.0.0.1:9999/test?username=HXZDFybpqHLvpw7wSB5zjeJ9MbnPFdSOyp7CgCRMxTrI8xUrBrdIahTD%2FIEEiybik6OosGsrEzHiZpIKrMgzpD5FhquAklPNNi%2Bntkf6SVZLCOIWUoDV5jOVYnRSDzU4MigRpOCyiMy5T%2Fzyt%2FlXl%2BP7EBVwuivXQWN%2FM5K60ws%3D&password=HXZDFybpqHLvpw7wSB5zjeJ9MbnPFdSOyp7CgCRMxTrI8xUrBrdIahTD%2FIEEiybik6OosGsrEzHiZpIKrMgzpD5FhquAklPNNi%2Bntkf6SVZLCOIWUoDV5jOVYnRSDzU4MigRpOCyiMy5T%2Fzyt%2FlXl%2BP7EBVwuivXQWN%2FM5K60ws%3D'
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上次更新: 2024/08/12, 14:38:19