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

Example 1 with StandardDecryptionMaterial

use of com.tom_roush.pdfbox.pdmodel.encryption.StandardDecryptionMaterial 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);
        }
    }
}