Resolving issue #743

- Recursive depth issue found in JSONObject
- Recursive depth issue found in JSONArray

src/main/java/org/json/JSONArray.java

@@ -149,11 +149,18 @@ public class JSONArray implements Iterable<Object> {
      *            A Collection.
      */
     public JSONArray(Collection<?> collection) {
+      this(collection, 0);
+    }
+
+    protected JSONArray(Collection<?> collection, int recursionDepth) {
+        if (recursionDepth > JSONObject.RECURSION_DEPTH_LIMIT) {
+          throw new JSONException("JSONArray has reached recursion depth limit of " + JSONObject.RECURSION_DEPTH_LIMIT);
+        }
         if (collection == null) {
             this.myArrayList = new ArrayList<Object>();
         } else {
             this.myArrayList = new ArrayList<Object>(collection.size());
-            this.addAll(collection, true);
+            this.addAll(collection, true, recursionDepth);
         }
     }
 
@@ -205,7 +212,7 @@ public class JSONArray implements Iterable<Object> {
             throw new JSONException(
                     "JSONArray initial value should be a string or collection or array.");
         }
-        this.addAll(array, true);
+        this.addAll(array, true, 0);
     }
 
     /**
@@ -1779,13 +1786,15 @@ public class JSONArray implements Iterable<Object> {
      * @param wrap
      *            {@code true} to call {@link JSONObject#wrap(Object)} for each item,
      *            {@code false} to add the items directly
+     * @param recursionDepth
+     *            variable to keep the count of how nested the object creation is happening.
      *            
      */
-    private void addAll(Collection<?> collection, boolean wrap) {
+    private void addAll(Collection<?> collection, boolean wrap, int recursionDepth) {
         this.myArrayList.ensureCapacity(this.myArrayList.size() + collection.size());
         if (wrap) {
             for (Object o: collection){
-                this.put(JSONObject.wrap(o));
+                this.put(JSONObject.wrap(o, recursionDepth + 1));
             }
         } else {
             for (Object o: collection){
@@ -1815,6 +1824,10 @@ public class JSONArray implements Iterable<Object> {
         }
     }
     
+    private void addAll(Object array, boolean wrap) throws JSONException {
+      this.addAll(array, wrap, 0);
+    }
+
     /**
      * Add an array's elements to the JSONArray.
      *
@@ -1825,19 +1838,21 @@ public class JSONArray implements Iterable<Object> {
      * @param wrap
      *            {@code true} to call {@link JSONObject#wrap(Object)} for each item,
      *            {@code false} to add the items directly
+     * @param recursionDepth
+     *            Variable to keep the count of how nested the object creation is happening.
      *
      * @throws JSONException
      *            If not an array or if an array value is non-finite number.
      * @throws NullPointerException
      *            Thrown if the array parameter is null.
      */
-    private void addAll(Object array, boolean wrap) throws JSONException {
+    private void addAll(Object array, boolean wrap, int recursionDepth) throws JSONException {
         if (array.getClass().isArray()) {
             int length = Array.getLength(array);
             this.myArrayList.ensureCapacity(this.myArrayList.size() + length);
             if (wrap) {
                 for (int i = 0; i < length; i += 1) {
-                    this.put(JSONObject.wrap(Array.get(array, i)));
+                    this.put(JSONObject.wrap(Array.get(array, i), recursionDepth + 1));
                 }
             } else {
                 for (int i = 0; i < length; i += 1) {
@@ -1850,7 +1865,7 @@ public class JSONArray implements Iterable<Object> {
             // JSONArray
             this.myArrayList.addAll(((JSONArray)array).myArrayList);
         } else if (array instanceof Collection) {
-            this.addAll((Collection<?>)array, wrap);
+            this.addAll((Collection<?>)array, wrap, recursionDepth);
         } else if (array instanceof Iterable) {
             this.addAll((Iterable<?>)array, wrap);
         } else {

src/main/java/org/json/JSONObject.java

@@ -147,6 +147,7 @@ public class JSONObject {
      * The map where the JSONObject's properties are kept.
      */
     private final Map<String, Object> map;
+    public static final int RECURSION_DEPTH_LIMIT = 1000;
 
     public Class<? extends Map> getMapType() {
         return map.getClass();
@@ -276,6 +277,17 @@ public class JSONObject {
      *            If a key in the map is <code>null</code>
      */
     public JSONObject(Map<?, ?> m) {
+      this(m, 0);
+    }
+
+    /**
+     * Construct a JSONObject from a map with recursion depth.
+     *
+     */
+    protected JSONObject(Map<?, ?> m, int recursionDepth) {
+        if (recursionDepth > RECURSION_DEPTH_LIMIT) {
+          throw new JSONException("JSONObject has reached recursion depth limit of " + RECURSION_DEPTH_LIMIT);
+        }
         if (m == null) {
             this.map = new HashMap<String, Object>();
         } else {
@@ -287,7 +299,7 @@ public class JSONObject {
                 final Object value = e.getValue();
                 if (value != null) {
                     testValidity(value);
-                    this.map.put(String.valueOf(e.getKey()), wrap(value));
+                    this.map.put(String.valueOf(e.getKey()), wrap(value, recursionDepth + 1));
                 }
             }
         }
@@ -2566,7 +2578,15 @@ public class JSONObject {
         return wrap(object, null);
     }
 
+    public static Object wrap(Object object, int recursionDepth) {
+      return wrap(object, null, recursionDepth);
+    }
+
     private static Object wrap(Object object, Set<Object> objectsRecord) {
+      return wrap(object, objectsRecord, 0);
+    }
+
+    private static Object wrap(Object object, Set<Object> objectsRecord, int recursionDepth) {
         try {
             if (NULL.equals(object)) {
                 return NULL;
@@ -2584,14 +2604,14 @@ public class JSONObject {
 
             if (object instanceof Collection) {
                 Collection<?> coll = (Collection<?>) object;
-                return new JSONArray(coll);
+                return new JSONArray(coll, recursionDepth);
             }
             if (object.getClass().isArray()) {
                 return new JSONArray(object);
             }
             if (object instanceof Map) {
                 Map<?, ?> map = (Map<?, ?>) object;
-                return new JSONObject(map);
+                return new JSONObject(map, recursionDepth);
             }
             Package objectPackage = object.getClass().getPackage();
             String objectPackageName = objectPackage != null ? objectPackage

src/test/java/org/json/junit/JSONArrayTest.java

@@ -1417,4 +1417,25 @@ public class JSONArrayTest {
                 .put(2);
         assertFalse(ja1.similar(ja3));
     }
+
+    @Test(expected = JSONException.class)
+    public void testRecursiveDepth() {
+      HashMap<String, Object> map = new HashMap<>();
+      map.put("t", map);
+      new JSONArray().put(map);
+    }
+
+    @Test(expected = JSONException.class)
+    public void testRecursiveDepthAtPosition() {
+      HashMap<String, Object> map = new HashMap<>();
+      map.put("t", map);
+      new JSONArray().put(0, map);
+    }
+
+    @Test(expected = JSONException.class)
+    public void testRecursiveDepthArray() {
+      ArrayList<Object> array = new ArrayList<>();
+      array.add(array);
+      new JSONArray(array);
+    }
 }

src/test/java/org/json/junit/JSONObjectTest.java

@@ -3718,4 +3718,21 @@ public class JSONObjectTest {
             assertThrows(JSONException.class, () -> new JSONObject(bean));
         }
     }
+
+    @Test(expected = JSONException.class)
+    public void issue743SerializationMap() {
+      HashMap<String, Object> map = new HashMap<>();
+      map.put("t", map);
+      JSONObject object = new JSONObject(map);
+      String jsonString = object.toString();
+    }
+
+    @Test(expected = JSONException.class)
+    public void testCircularReferenceMultipleLevel() {
+      HashMap<String, Object> inside = new HashMap<>();
+      HashMap<String, Object> jsonObject = new HashMap<>();
+      inside.put("inside", jsonObject);
+      jsonObject.put("test", inside);
+      new JSONObject(jsonObject);
+    }
 }