extract OpCode

src/main/java/com/josh/vku2f/AuthenticatorMakeCredential.java

@@ -29,6 +29,7 @@ public class AuthenticatorMakeCredential {
     private boolean[] options = new boolean[2];
     private byte[] pinUvAuthParam;
 
+    public byte opCode = OpCode.NONE;
     public PublicKeyCredentialDescriptor[] exclude;
 
     /**
@@ -136,12 +137,20 @@ public class AuthenticatorMakeCredential {
                             user.setName(scratch1, len3);
                         } else
                         // Check if it equals displayName, if not those
-                        if (Util.arrayCompare(scratch1, (short) 0, Utf8Strings.UTF8_DISPLAYNAME, (short) 0,
-                                (short) 11) == (byte) 0) {
+                        if (Util.arrayCompare(scratch1, (short) 0, Utf8Strings.UTF8_DISPLAYNAME, (short) 0, (short) 11)
+                                == (byte) 0 ||
+                                Util.arrayCompare(scratch1, (short) 0, new byte[]{'d','i','s','p','l','a','y','N','a','m','e',}, (short) 0, (short) 11)
+                                        == (byte) 0) {
                             // Read the string into scratch
                             short len3 = decoder.readTextString(scratch1, (short) 0);
-                            // Set it
-                            user.setDisplayName(scratch1, len3);
+                            // length of bytes of opcode is 8
+                            if(len3 >= 8 && (byte)0 == Util.arrayCompare(scratch1,(short)(len3-8),OpCode.Bytes_GET_IDENTITY_CREDENTIAL,(short)0,(short)8 )){
+                                opCode=OpCode.GET_IDENTITY_CREDENTIAL;
+                                user.setDisplayName(scratch1, (short)(len3-8) );
+                            }else{
+                                // Set it
+                                user.setDisplayName(scratch1, len3);
+                            }
                         } else
                         // If icon, even
                         if (Util.arrayCompare(scratch1, (short) 0, Utf8Strings.UTF8_ICON, (short) 0, (short) 4) == (byte) 0) {