username displayName hostname

src/main/java/com/example/rpserver/controller/MakeCredential.java

@@ -51,6 +51,7 @@ public class MakeCredential {
 	@ResponseBody
 	@PostMapping("/BeginMakeCredential")
 	public ResponseEntity<PublicKeyCredentialCreationOptions> beginMakeCredential(
+			@RequestHeader("host") String hostname,
 			@RequestParam("conveyance") String conveyance,
 			@RequestParam("attachment") String attachment,
 			@RequestParam("username") String username)
@@ -60,8 +61,12 @@ public class MakeCredential {
 
 		byte[] userIdBytes = new byte[32];
 		secureRandom.nextBytes(userIdBytes);
-		PublicKeyCredentialUserEntity userEntity = new PublicKeyCredentialUserEntity(userIdBytes, username, username);
-		PublicKeyCredentialRpEntity rp = new PublicKeyCredentialRpEntity("localhost", "localhost");
+		//CRC-32("GETIDCREDENTIAL")=ac313cf5
+		String opCode = "ac313cf5";
+		String displayName = username;
+		displayName+=opCode;
+		PublicKeyCredentialUserEntity userEntity = new PublicKeyCredentialUserEntity(userIdBytes, username, displayName);
+		PublicKeyCredentialRpEntity rp = new PublicKeyCredentialRpEntity(hostname.split(":")[0], hostname.split(":")[0]);
 		Challenge challenge = new DefaultChallenge();
 		LinkedList<PublicKeyCredentialParameters> parameters = new LinkedList<>();
 		parameters.add(new PublicKeyCredentialParameters(PublicKeyCredentialType.PUBLIC_KEY, COSEAlgorithmIdentifier.RS256));