SpringCloud-Gateway实现RSA加解密

在Spring Cloud Gateway中实现RSA加解密，你可以创建一个GatewayFilter Factory，用于在请求被路由前进行加密，响应被处理后进行解密。以下是一个简化的例子：

1. 添加RSA加解密的依赖（如使用BC提供者）：

<dependency>
    <groupId>org.bouncycastle</groupId>
    <artifactId>bcprov-jdk15on</artifactId>
    <version>1.68</version>
</dependency>

2. 创建GatewayFilter Factory：

@Component
public class RsaCryptoFilterFactory extends AbstractGatewayFilterFactory<RsaCryptoFilterFactory.Config> {
 
    private final PublicKey publicKey;
    private final PrivateKey privateKey;
 
    public RsaCryptoFilterFactory() throws Exception {
        // 初始化公钥和私钥
        this.publicKey = ...
        this.privateKey = ...
    }
 
    @Override
    public List<String> argNames() {
        return Arrays.asList("path"); // 指定路径参数名
    }
 
    @Override
    public GatewayFilter apply(Config config) {
        return (exchange, chain) -> {
            ServerHttpRequest request = exchange.getRequest();
            // 加密处理
            String path = request.getURI().getPath();
            if ("/encrypt".equals(path)) {
                String payload = ... // 获取请求体中的数据
                String encryptedPayload = encrypt(payload);
                ServerHttpRequest newRequest = request.mutate()
                        .body(BodyInserters.fromValue(encryptedPayload))
                        .build();
                return chain.filter(exchange.mutate().request(newRequest).build());
            }
 
            // 解密处理
            Mono<String> encryptedBody = request.getBodyAsString();
            return encryptedBody.flatMap(payload -> {
                String decryptedPayload = decrypt(payload);
                ServerHttpRequest newRequest = request.mutate()
                        .body(BodyInserters.fromValue(decryptedPayload))
                        .build();
                return chain.filter(exchange.mutate().request(newRequest).build());
            });
        };
    }
 
    private String encrypt(String payload) throws Exception {
        // 使用公钥加密
        ...
    }
 
    private String decrypt(String payload) throws Exception {
        // 使用私钥解密
        ...
    }
 
    public static class Config {
        // 配置参数（如果需要）
    }
}

3. 在application.yml中配置Gateway Filter：

spring:
  cloud:
    gateway:
      routes:
      - id: encrypt_route
        uri: ...
        filters:
        - RsaCryptoFilterFactory=path=/encrypt

确保你的RSA公钥和私钥被正确加载，并且在加解密过