RSAConfiguration.java

spring-boot/src/main/java/com/tutego/ch_09/security/RSAConfiguration.java

package com.tutego.ch_09.security;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.nimbusds.jose.jwk.RSAKey;

import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.util.UUID;

@Configuration
public class RSAConfiguration {

    @Bean
    public RSAKey rsaKey() throws NoSuchAlgorithmException {
        var generator = KeyPairGenerator.getInstance("RSA");
        generator.initialize(2048);
        var keyPair = generator.generateKeyPair();

        return new RSAKey.Builder((RSAPublicKey) keyPair.getPublic())
                .privateKey((RSAPrivateKey) keyPair.getPrivate())
                .keyID(UUID.randomUUID().toString())
                .build();
    }
}