Add tests for CR/LF rejection in SimpleSMTPHeader and SimpleNNTPHeader

Author: dxbjavid

src/test/java/org/apache/commons/net/nntp/SimpleNNTPHeaderTestCase.java

@@ -0,0 +1,58 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.net.nntp;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+import org.junit.jupiter.api.Test;
+
+/**
+ * Tests {@link SimpleNNTPHeader}.
+ */
+class SimpleNNTPHeaderTestCase {
+
+    @Test
+    void testRejectCarriageReturnInConstructor() {
+        assertThrows(IllegalArgumentException.class, () -> new SimpleNNTPHeader("foobar@foo.invalid", "Subject\rInjected: header"));
+    }
+
+    @Test
+    void testRejectLineFeedInAddHeaderField() {
+        final SimpleNNTPHeader header = new SimpleNNTPHeader("foobar@foo.invalid", "Just testing");
+        assertThrows(IllegalArgumentException.class, () -> header.addHeaderField("Organization", "Foobar, Inc.\nInjected: header"));
+    }
+
+    @Test
+    void testRejectLineFeedInAddNewsgroup() {
+        final SimpleNNTPHeader header = new SimpleNNTPHeader("foobar@foo.invalid", "Just testing");
+        assertThrows(IllegalArgumentException.class, () -> header.addNewsgroup("alt.test\nInjected: header"));
+    }
+
+    @Test
+    void testRejectLineFeedInConstructor() {
+        assertThrows(IllegalArgumentException.class, () -> new SimpleNNTPHeader("foobar@foo.invalid", "Subject\nInjected: header"));
+    }
+
+    @Test
+    void testToString() {
+        final SimpleNNTPHeader header = new SimpleNNTPHeader("foobar@foo.invalid", "Just testing");
+        header.addNewsgroup("alt.test");
+        header.addHeaderField("Organization", "Foobar, Inc.");
+        assertEquals("From: foobar@foo.invalid\nNewsgroups: alt.test\nSubject: Just testing\nOrganization: Foobar, Inc.\n\n", header.toString());
+    }
+}

src/test/java/org/apache/commons/net/smtp/SimpleSMTPHeaderTestCase.java

@@ -105,6 +105,28 @@ void testToStringAddHeaderDate() {
         assertEquals("Date: dummy date\nFrom: from@here.invalid\n\n", header.toString());
     }
 
+    @Test
+    void testRejectCarriageReturnInConstructor() {
+        assertThrows(IllegalArgumentException.class, () -> new SimpleSMTPHeader("from@here.invalid", "to@there.invalid", "Subject\rInjected: header"));
+    }
+
+    @Test
+    void testRejectLineFeedInAddCC() {
+        final SimpleSMTPHeader header = new SimpleSMTPHeader("from@here.invalid", null, null);
+        assertThrows(IllegalArgumentException.class, () -> header.addCC("cc@there.invalid\nBcc: victim@there.invalid"));
+    }
+
+    @Test
+    void testRejectLineFeedInAddHeaderField() {
+        final SimpleSMTPHeader header = new SimpleSMTPHeader("from@here.invalid", null, null);
+        assertThrows(IllegalArgumentException.class, () -> header.addHeaderField("X-Header1", "value 1\nX-Injected: value 2"));
+    }
+
+    @Test
+    void testRejectLineFeedInConstructor() {
+        assertThrows(IllegalArgumentException.class, () -> new SimpleSMTPHeader("from@here.invalid", "to@there.invalid", "Subject\nInjected: header"));
+    }
+
     @Test
     void testToStringNoFrom() {
         assertThrows(IllegalArgumentException.class, () -> new SimpleSMTPHeader(null, null, null));