EMAIL-212 MIME closing boundary delimiter incorrectly accepted when followed by extra characters

commons-email2-javax/src/test/java/org/apache/commons/mail2/javax/util/MimeMessageParserTest.java

@@ -23,10 +23,14 @@
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import java.io.File;
+import java.io.InputStream;
+import org.apache.commons.io.IOUtils;
 import java.nio.file.Paths;
 import java.util.List;
 import java.util.Properties;
 
+import java.nio.charset.StandardCharsets;
+
 import javax.activation.DataSource;
 import javax.mail.Session;
 import javax.mail.internet.MimeMessage;
@@ -469,4 +473,26 @@ void testParseSimpleReplyEmail() throws Exception {
         assertFalse(mimeMessageParser.hasAttachments());
     }
 
+    @Test
+    void testParseMultipartEndingEmail() throws Exception {
+        final Session session = Session.getDefaultInstance(new Properties());
+        final MimeMessage message = MimeMessageUtils.createMimeMessage(session, new File("./src/test/resources/eml/multipart-ending-boundary.eml"));
+        final MimeMessageParser mimeMessageParser = new MimeMessageParser(message);
+
+        mimeMessageParser.parse();
+
+        assertTrue(mimeMessageParser.isMultipart());
+        assertTrue(mimeMessageParser.hasAttachments());
+
+        final List<?> attachmentList = mimeMessageParser.getAttachmentList();
+        assertEquals(1, attachmentList.size());
+
+        final DataSource dataSource = mimeMessageParser.findAttachmentByName("test.txt");
+        assertNotNull(dataSource);
+        assertEquals("text/plain", dataSource.getContentType());
+
+        InputStream inputStream = dataSource.getInputStream();
+        String content = IOUtils.toString(inputStream, StandardCharsets.UTF_8);
+        assertEquals("test\n\n--------------010700020404090103050203--MORE", content);
+    }
 }

commons-email2-javax/src/test/resources/eml/multipart-ending-boundary.eml

@@ -0,0 +1,22 @@
+Return-Path: <[email protected]>
+Message-ID: <[email protected]>
+Date: Fri, 02 Aug 2013 20:53:33 +0200
+From: [email protected]
+MIME-Version: 1.0
+To: [email protected]
+Subject: test
+Content-Type: multipart/mixed;
+ boundary="------------010700020404090103050203"
+
+This is a multi-part message in MIME format.
+--------------010700020404090103050203
+Content-Type: text/plain; charset=UTF-8;
+ name="test.txt"
+Content-Transfer-Encoding: 7bit
+Content-Disposition: attachment;
+
+test
+
+--------------010700020404090103050203--MORE
+
+--------------010700020404090103050203--