Spring JAVA SSL - No name matching localhost found - spring

Question

I have two SSL end-points that share the same application.properties and key store file.
I want to have one end-point call the other, but getting an error No name matching localhost found
How can I adjust this to allow one microservice to call the other(s) as intended below?
I have played with the following to attempt a solution to no avail:
javax.net.ssl.HostnameVerifier()
Created a localhost certificate and added it to the keystore
#CrossOrigin(origins = "*", maxAge = 3600)
#RestController
public class submitapplicationcontroller {
#Bean
public WebClient.Builder getWebClientBuilder(){
return WebClient.builder();
}
#Autowired private WebClient.Builder webClientBuilder;
#PostMapping("/submitapplication")
public String submitapplication() {
/*** Returns Error Found Below ***/
String response = webClientBuilder.build()
.post()
.uri("https://localhost:8080/validateaddress")
.retrieve()
.bodyToMono(String.class)
.block();
return response;
}
}
javax.net.ssl.SSLHandshakeException: No name matching localhost found
at java.base/sun.security.ssl.Alert.createSSLException
Error has been observed at the following site(s):
|_ checkpoint ⇢ Request to POST https://localhost:8080/v1/validateaddress
#CrossOrigin(origins = "*", maxAge = 3600)
#RestController
public class validateaddresscontroller {
#PostMapping("/validateaddress")
public String validateaddress() {
return "response";
}
}
server.ssl.key-alias=server
server.ssl.key-password=asensitivesecret
server.ssl.key-store=classpath:server.jks
server.ssl.key-store-provider=SUN
server.ssl.key-store-type=JKS
server.ssl.key-store-password=asensitivesecret

Answer 1

The problem here was the way I went about creating and implementing the certificates. I had 2 separate keystores and certificates; one named "server", and one named "localhost". I added the localhost certificate to the server keystore, and applied the server keystore and certificate to the springboot application / application.properties.
What you have to do is create just one certificate and keystore dubbed "localhost" and you have to use that to apply to the application / application.properties.
What you should have after creating the localhost JKS and certificate
server.ssl.key-alias=localhost
server.ssl.key-password=asensitivesecret
server.ssl.key-store=classpath:localhost.jks
server.ssl.key-store-provider=SUN
server.ssl.key-store-type=JKS
server.ssl.key-store-password=asensitivesecret
Note: I don't believe you actually have to create a JKS named "localhost", just the certificate. I just did for testing purposes.