REPORT-30379 在third中加一个 third（不在打包范围内，需要自己添加junit依赖才能跑）

fine-itext-old/test/com/fr/third/com/lowagie/text/pdf/PdfEncryptDecryptTest.java

@@ -0,0 +1,74 @@
+package com.fr.third.com.lowagie.text.pdf;
+
+import com.fr.third.com.lowagie.text.Document;
+import com.fr.third.com.lowagie.text.DocumentException;
+import com.fr.third.com.lowagie.text.Paragraph;
+import com.fr.third.com.lowagie.text.exceptions.BadPasswordException;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import org.junit.Test;
+
+import static junit.framework.TestCase.assertTrue;
+import static org.junit.Assert.fail;
+
+/**
+ * @author Hugh.C
+ * @version 1.0
+ * Created by Hugh.C on 2020/4/28
+ */
+public class PdfEncryptDecryptTest {
+
+    @Test
+    public void testPdfEncryption() {
+
+        try {
+            byte[] bytes = createPdfEncryptionDocumentByteArray("123");
+            assertTrue(bytes.length > 0);
+        } catch (Exception e) {
+            fail();
+        }
+    }
+
+    @Test
+    public void testPdfDecrypt() {
+
+        try {
+            //沒報錯，解密成功
+            new PdfReader(createPdfEncryptionDocumentByteArray("123"), "123".getBytes());
+        } catch (Exception e) {
+            fail();
+        }
+
+        boolean result = false;
+        try {
+            //報錯，解密失敗
+            new PdfReader(createPdfEncryptionDocumentByteArray("123"), "234".getBytes());
+        } catch (Exception e) {
+            assertTrue(e instanceof BadPasswordException);
+            result = true;
+        }
+        assertTrue(result);
+    }
+
+    /**
+     * 創建加密過後的pdf document 數組
+     *
+     * @param passWord pdf密碼
+     * @return
+     * @throws DocumentException
+     * @throws IOException
+     */
+    private byte[] createPdfEncryptionDocumentByteArray(String passWord) throws DocumentException, IOException {
+        ByteArrayOutputStream byteOutputStream = new ByteArrayOutputStream();
+        Document document = new Document();
+        PdfWriter write = PdfWriter.getInstance(document, byteOutputStream);
+        String userPassword = "老王";
+        write.setEncryption(userPassword.getBytes(), passWord.getBytes(), PdfWriter.ALLOW_ASSEMBLY, PdfWriter.ENCRYPTION_AES_128);
+        document.open();
+        document.add(new Paragraph("ABCDEFG"));
+        document.close();
+        write.close();
+        byteOutputStream.flush();
+        return byteOutputStream.toByteArray();
+    }
+}