使用RSA算法对接口参数签名及验签

package com.springboot.RSAdemo;import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.util.Base64;/**
* @description 生成RSA公/私钥对
*
* @author admin
*
*/
public class GeneratorRSAKey { public static void main(String[] args) {
jdkRSA();
} public static void jdkRSA() {
GeneratorRSAKey generatorRSAKey = new GeneratorRSAKey(); try {
// 初始化密钥，产生公钥私钥对
Object[] keyPairArr = generatorRSAKey.initSecretkey();
RSAPublicKey rsaPublicKey = (RSAPublicKey) keyPairArr[0];
RSAPrivateKey rsaPrivateKey = (RSAPrivateKey) keyPairArr[1]; System.out.println("------------------PublicKey------------------");
System.out.println(Base64.getEncoder().encodeToString(rsaPublicKey.getEncoded())); System.out.println("\n------------------PrivateKey------------------");
System.out.println(Base64.getEncoder().encodeToString(rsaPrivateKey.getEncoded()));
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} } /**
* 初始化密钥，生成公钥私钥对
*
* @return Object[]
* @throws NoSuchAlgorithmException
*/
private Object[] initSecretkey() throws NoSuchAlgorithmException {
KeyPairGenerator keyPairGenerator = KeyPairGenerator.getInstance("RSA");
keyPairGenerator.initialize(512);
KeyPair keyPair = keyPairGenerator.generateKeyPair(); RSAPublicKey rsaPublicKey = (RSAPublicKey) keyPair.getPublic();
RSAPrivateKey rsaPrivateKey = (RSAPrivateKey) keyPair.getPrivate(); Object[] keyPairArr = new Object[2];
keyPairArr[0] = rsaPublicKey;
keyPairArr[1] = rsaPrivateKey; return keyPairArr;
}
}

package com.springboot.RSAdemo;import java.security.InvalidKeyException;
import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.security.SignatureException;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.Base64;/**
* @description RSA签名工具类
*
* @author admin
*
*/
public class JdkSignatureUtil { private final static String RSA = "RSA"; private final static String MD5_WITH_RSA = "MD5withRSA"; /**
* 执行签名
*
* @param rsaPrivateKey 私钥
* @param toSignStr 参数内容
* @return 签名后的内容，base64后的字符串
* @throws NoSuchAlgorithmException
* @throws InvalidKeySpecException
* @throws InvalidKeyException
* @throws SignatureException
*/
public static String executeSignature(String rsaPrivateKey, String toSignStr) throws NoSuchAlgorithmException, InvalidKeySpecException, InvalidKeyException, SignatureException {
// base64解码私钥
byte[] decodePrivateKey = Base64.getDecoder().decode(rsaPrivateKey.replace("\r\n", "")); PKCS8EncodedKeySpec pkcs8EncodedKeySpec = new PKCS8EncodedKeySpec(decodePrivateKey);
KeyFactory keyFactory = KeyFactory.getInstance(RSA);
PrivateKey privateKey = keyFactory.generatePrivate(pkcs8EncodedKeySpec);
Signature signature = Signature.getInstance(MD5_WITH_RSA);
signature.initSign(privateKey);
signature.update(toSignStr.getBytes()); // 生成签名
byte[] result = signature.sign(); // base64编码签名为字符串
return Base64.getEncoder().encodeToString(result);
} /**
* 验证签名
*
* @param rsaPublicKey 公钥
* @param sign 签名
* @param src 参数内容
* @return 验证结果
* @throws NoSuchAlgorithmException
* @throws InvalidKeySpecException
* @throws InvalidKeyException
* @throws SignatureException
*/
public static boolean verifySignature(String rsaPublicKey, String sign, String src) throws NoSuchAlgorithmException, InvalidKeySpecException, InvalidKeyException, SignatureException {
// base64解码公钥
byte[] decodePublicKey = Base64.getDecoder().decode(rsaPublicKey.replace("\r\n", "")); X509EncodedKeySpec x509EncodedKeySpec = new X509EncodedKeySpec(decodePublicKey);
KeyFactory keyFactory = KeyFactory.getInstance(RSA);
PublicKey publicKey = keyFactory.generatePublic(x509EncodedKeySpec);
Signature signature = Signature.getInstance(MD5_WITH_RSA);
signature.initVerify(publicKey);
signature.update(src.getBytes());
// base64解码签名为字节数组
byte[] decodeSign = Base64.getDecoder().decode(sign); // 验证签名
return signature.verify(decodeSign);
}
}

package com.springboot.RSAdemo;import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SignatureException;
import java.security.spec.InvalidKeySpecException;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;/**
* @description 发送端
*
* @author admin
*
*/
public class ClientController { //私钥
private final static String PRIVATE_KEY = "MIIBUwIBADANBgkqhkiG9w0BAQEFAASCAT0wggE5AgEAAkEAnPWR8anPt0YVkJRj+Rdu9gFdkR3leD5LxJFEP6naIYJ5CUon4XJy5uh7uEivyOHJMQqlo4U3zBbn9A1d07MOcwIDAQABAkAZhys0ddztvv1U5X2ZDsGiSziPmKAwvVkPYF0MSbDLkC6ZF6SDosPnBOQGY1YXF88eknAxEmuhWHnRAb05QnUJAiEA03SgC954tZS4OLyRf/4ArNdOBYurKQPbCapDgwAesYUCIQC+BhF3FBGyIlnh7D1iN+uNm1atga5go3widi7dqRnFlwIgEuQldEoA4MAToUX/fb7Ukpx9pPMwbG6iv/9NHsQA+f0CIALRfDjT519I+yRKqK5oPeofv61bGwb75b9tGUzYUTWJAiBLKFNjABVQWu5zYD+IGx3ooJyAFn7rwFGL8Y3h1V1ITg=="; public static String sender() throws InvalidKeyException, NoSuchAlgorithmException, InvalidKeySpecException, SignatureException, UnsupportedEncodingException {
// 请求所需的参数
Map<String, Object> requestParam = new HashMap<>(16);
requestParam.put("userName", "小明");
requestParam.put("phone", "15866552236");
requestParam.put("address", "北京");
requestParam.put("status", 1); // 将需要签名的参数内容按参数名的字典顺序进行排序，并拼接为字符串
StringBuilder sb = new StringBuilder();
requestParam.entrySet().stream().sorted(
Comparator.comparing(Map.Entry::getKey)).forEach(entry ->
sb.append(entry.getKey()).append("=").append(entry.getValue()).append("&"));
String paramStr = sb.toString().substring(0, sb.length() - 1);
System.out.println("paramStr:" + paramStr); // 使用私钥生成签名字符串
String sign = JdkSignatureUtil.executeSignature(PRIVATE_KEY, paramStr); // 对签名字符串进行url编码
String urlEncodeSign = URLEncoder.encode(sign, "UTF-8");
// String urlEncodeSign = URLEncoder.encode(sign, StandardCharsets.UTF_8.toString()); // 请求参数中需带上签名字符串
requestParam.put("sign", urlEncodeSign); // 发送请求
return postJson("http://localhost:8080/test", requestParam);
} /**
* 发送数据类型为json的post请求
*
* @param <T>
* @param url
* @param param
* @return
*/
public static <T> String postJson(String url, T param) {
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
HttpEntity<T> httpEntity = new HttpEntity<>(param, headers); RestTemplate restTemplate = new RestTemplate();
ResponseEntity<String> responseEntity = restTemplate.postForEntity(url, httpEntity, String.class); return responseEntity.getBody();
} public static void main(String[] args) {
try {
System.out.println(sender());
} catch (Exception e) {
e.printStackTrace();
}
}
}

package com.springboot.RSAdemo;import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.nio.charset.StandardCharsets;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SignatureException;
import java.security.spec.InvalidKeySpecException;
import java.util.Comparator;
import java.util.Map;import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;@RestController
public class ServerController { // 公钥
private final static String PUBLIC_KEY = "MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAJz1kfGpz7dGFZCUY/kXbvYBXZEd5Xg+S8SRRD+p2iGCeQlKJ+Fycuboe7hIr8jhyTEKpaOFN8wW5/QNXdOzDnMCAwEAAQ=="; @PostMapping(value = "/test")
public String server(@RequestBody Map<String, Object> param) throws InvalidKeySpecException,
NoSuchAlgorithmException, InvalidKeyException, SignatureException, UnsupportedEncodingException {
// 从参数中取出签名字符串并删除，因为sign不参与字符串拼接
String sign = (String) param.remove("sign");
// 对签名字符串进行url解码
String decodeSign = URLDecoder.decode(sign, "UTF-8");
// String decodeSign = URLDecoder.decode(sign, StandardCharsets.UTF_8.toString()); // 将签名的参数内容按参数名的字典顺序进行排序，并拼接为字符串
StringBuilder sb = new StringBuilder();
param.entrySet().stream().sorted(Comparator.comparing(Map.Entry::getKey)).forEach(entry ->
sb.append(entry.getKey()).append("=").append(entry.getValue()).append("&")
);
String paramStr = sb.toString().substring(0, sb.length() - 1); // 使用公钥进行验签
boolean result = JdkSignatureUtil.verifySignature(PUBLIC_KEY, decodeSign, paramStr);
if (result) {
return "签名验证成功";
} return "签名验证失败，非法请求";
}
}