Examples with StandardProtectionPolicy com.tom_roush.pdfbox.pdmodel.encryption.StandardProtectionPolicy used on opensource projects

Example 1 with StandardProtectionPolicy

use of com.tom_roush.pdfbox.pdmodel.encryption.StandardProtectionPolicy in project PdfBox-Android by TomRoush.

the class TestSymmetricKeyEncryption method testPDFBox4453.

/**
 * PDFBOX-4453: verify that identical encrypted strings are really decrypted each.
 *
 * @throws IOException
 */
@Test
public void testPDFBox4453() throws IOException {
    final int TESTCOUNT = 1000;
    File file = new File(testResultsDir, "PDFBOX-4453.pdf");
    PDDocument doc = new PDDocument();
    doc.addPage(new PDPage());
    for (int i = 0; i < TESTCOUNT; ++i) {
        // strings must be in different dictionaries so that the actual
        // encryption key changes
        COSDictionary dict = new COSDictionary();
        doc.getPage(0).getCOSObject().setItem(COSName.getPDFName("_Test-" + i), dict);
        // need two different keys so that there are both encrypted and decrypted COSStrings
        // with value "0"
        dict.setString("key1", "3");
        dict.setString("key2", "0");
    }
    // RC4-40
    StandardProtectionPolicy spp = new StandardProtectionPolicy("12345", "", new AccessPermission());
    spp.setEncryptionKeyLength(40);
    spp.setPreferAES(false);
    doc.protect(spp);
    doc.save(file);
    doc.close();
    doc = PDDocument.load(file);
    Assert.assertTrue(doc.isEncrypted());
    for (int i = 0; i < TESTCOUNT; ++i) {
        COSDictionary dict = doc.getPage(0).getCOSObject().getCOSDictionary(COSName.getPDFName("_Test-" + i));
        assertEquals("3", dict.getString("key1"));
        assertEquals("0", dict.getString("key2"));
    }
    doc.close();
}

Example 2 with StandardProtectionPolicy

use of com.tom_roush.pdfbox.pdmodel.encryption.StandardProtectionPolicy in project PdfBox-Android by TomRoush.

the class TestSymmetricKeyEncryption method encrypt.

// encrypt with keylength and permission, save, check sizes before and after encryption
// reopen, decrypt and return document
private PDDocument encrypt(int keyLength, boolean preferAES, int sizePriorToEncr, PDDocument doc, String prefix, AccessPermission permission, String userpassword, String ownerpassword) throws IOException {
    StandardProtectionPolicy spp = new StandardProtectionPolicy(ownerpassword, userpassword, permission);
    spp.setEncryptionKeyLength(keyLength);
    spp.setPreferAES(preferAES);
    // This must have no effect and should only log a warning.
    doc.setAllSecurityToBeRemoved(true);
    doc.protect(spp);
    File pdfFile = new File(testResultsDir, prefix + keyLength + "-bit-" + (preferAES ? "AES" : "RC4") + "-encrypted.pdf");
    doc.save(pdfFile);
    doc.close();
    long sizeEncrypted = pdfFile.length();
    Assert.assertTrue(keyLength + "-bit " + (preferAES ? "AES" : "RC4") + " encrypted pdf should not have same size as plain one", sizeEncrypted != sizePriorToEncr);
    // test with owner password => full permissions
    PDDocument encryptedDoc = PDDocument.load(pdfFile, ownerpassword);
    Assert.assertTrue(encryptedDoc.isEncrypted());
    Assert.assertTrue(encryptedDoc.getCurrentAccessPermission().isOwnerPermission());
    // Older encryption allows to get the user password when the owner password is known
    PDEncryption encryption = encryptedDoc.getEncryption();
    int revision = encryption.getRevision();
    if (revision < 5) {
        StandardSecurityHandler standardSecurityHandler = new StandardSecurityHandler();
        int keyLengthInBytes = encryption.getVersion() == 1 ? 5 : encryption.getLength() / 8;
        byte[] computedUserPassword = standardSecurityHandler.getUserPassword(ownerpassword.getBytes(Charsets.ISO_8859_1), encryption.getOwnerKey(), revision, keyLengthInBytes);
        assertEquals(userpassword.substring(0, 32), new String(computedUserPassword, Charsets.ISO_8859_1));
    }
    encryptedDoc.close();
    // test with user password => restricted permissions
    encryptedDoc = PDDocument.load(pdfFile, userpassword);
    Assert.assertTrue(encryptedDoc.isEncrypted());
    Assert.assertFalse(encryptedDoc.getCurrentAccessPermission().isOwnerPermission());
    assertEquals(permission.getPermissionBytes(), encryptedDoc.getCurrentAccessPermission().getPermissionBytes());
    return encryptedDoc;
}

Example 3 with StandardProtectionPolicy

use of com.tom_roush.pdfbox.pdmodel.encryption.StandardProtectionPolicy in project PdfBox-Android by TomRoush.

the class MainActivity method createEncryptedPdf.

/**
 * Creates a simple pdf and encrypts it
 */
public void createEncryptedPdf(View v) {
    String path = root.getAbsolutePath() + "/crypt.pdf";
    // 128 bit is the highest currently supported
    int keyLength = 128;
    // Limit permissions of those without the password
    AccessPermission ap = new AccessPermission();
    ap.setCanPrint(false);
    // Sets the owner password and user password
    StandardProtectionPolicy spp = new StandardProtectionPolicy("12345", "hi", ap);
    // Setups up the encryption parameters
    spp.setEncryptionKeyLength(keyLength);
    spp.setPermissions(ap);
    BouncyCastleProvider provider = new BouncyCastleProvider();
    Security.addProvider(provider);
    PDFont font = PDType1Font.HELVETICA;
    PDDocument document = new PDDocument();
    PDPage page = new PDPage();
    document.addPage(page);
    try {
        PDPageContentStream contentStream = new PDPageContentStream(document, page);
        // Write Hello World in blue text
        contentStream.beginText();
        contentStream.setNonStrokingColor(15, 38, 192);
        contentStream.setFont(font, 12);
        contentStream.newLineAtOffset(100, 700);
        contentStream.showText("Hello World");
        contentStream.endText();
        contentStream.close();
        // Save the final pdf document to a file
        // Apply the protections to the PDF
        document.protect(spp);
        document.save(path);
        document.close();
        tv.setText("Successfully wrote PDF to " + path);
    } catch (IOException e) {
        Log.e("PdfBox-Android-Sample", "Exception thrown while creating PDF for encryption", e);
    }
}