Examples with COSNull com.tom_roush.pdfbox.cos.COSNull used on opensource projects

Example 1 with COSNull

use of com.tom_roush.pdfbox.cos.COSNull in project PdfBox-Android by TomRoush.

the class PDStream method getMetadata.

/**
 * Get the metadata that is part of the document catalog. This will return
 * null if there is no meta data for this object.
 *
 * @return The metadata for this object.
 * @throws IllegalStateException if the value of the metadata entry is different from a stream
 *                               or null
 */
public PDMetadata getMetadata() {
    PDMetadata retval = null;
    COSBase mdStream = stream.getDictionaryObject(COSName.METADATA);
    if (mdStream != null) {
        if (mdStream instanceof COSStream) {
            retval = new PDMetadata((COSStream) mdStream);
        } else if (mdStream instanceof COSNull) {
        // null is authorized
        } else {
            throw new IllegalStateException("Expected a COSStream but was a " + mdStream.getClass().getSimpleName());
        }
    }
    return retval;
}

Example 2 with COSNull

use of com.tom_roush.pdfbox.cos.COSNull in project PdfBox-Android by TomRoush.

the class COSParser method prepareDecryption.

/**
 * Prepare for decryption.
 *
 * @throws InvalidPasswordException If the password is incorrect.
 * @throws IOException if something went wrong
 */
private void prepareDecryption() throws IOException {
    if (encryption != null) {
        return;
    }
    COSBase trailerEncryptItem = document.getTrailer().getItem(COSName.ENCRYPT);
    if (trailerEncryptItem == null || trailerEncryptItem instanceof COSNull) {
        return;
    }
    if (trailerEncryptItem instanceof COSObject) {
        COSObject trailerEncryptObj = (COSObject) trailerEncryptItem;
        parseDictionaryRecursive(trailerEncryptObj);
    }
    try {
        encryption = new PDEncryption(document.getEncryptionDictionary());
        DecryptionMaterial decryptionMaterial;
        if (keyStoreInputStream != null) {
            KeyStore ks = KeyStore.getInstance("PKCS12");
            ks.load(keyStoreInputStream, password.toCharArray());
            decryptionMaterial = new PublicKeyDecryptionMaterial(ks, keyAlias, password);
        } else {
            decryptionMaterial = new StandardDecryptionMaterial(password);
        }
        securityHandler = encryption.getSecurityHandler();
        securityHandler.prepareForDecryption(encryption, document.getDocumentID(), decryptionMaterial);
        accessPermission = securityHandler.getCurrentAccessPermission();
    } catch (IOException e) {
        throw e;
    } catch (Exception e) {
        throw new IOException("Error (" + e.getClass().getSimpleName() + ") while creating security handler for decryption", e);
    } finally {
        if (keyStoreInputStream != null) {
            IOUtils.closeQuietly(keyStoreInputStream);
        }
    }
}