8261472: BasicConstraintsExtension::toString shows "PathLen:214748364…

…7" if there is no pathLenConstraint

Reviewed-by: jnimeh

src/java.base/share/classes/sun/security/x509/BasicConstraintsExtension.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2009, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2021, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -171,10 +171,17 @@ public BasicConstraintsExtension(Boolean critical, Object value)
       * Return user readable form of extension.
       */
      public String toString() {
+         String pathLenAsString;
+         if (pathLen < 0) {
+             pathLenAsString = " undefined";
+         } else if (pathLen == Integer.MAX_VALUE) {
+             pathLenAsString = " no limit";
+         } else {
+             pathLenAsString = String.valueOf(pathLen);
+         }
          return super.toString() +
              "BasicConstraints:[\n  CA:" + ca +
-             "\n  PathLen:" +
-             ((pathLen >= 0) ? String.valueOf(pathLen) : " undefined") +
+             "\n  PathLen:" + pathLenAsString +
              "\n]\n";
      }