Example usage for com.lowagie.text.pdf PdfPKCS7 getEncodedPKCS1

Introduction

In this page you can find the example usage for com.lowagie.text.pdf PdfPKCS7 getEncodedPKCS1.

Prototype

public byte[] getEncodedPKCS1() 

Source Link

Document

Gets the bytes for the PKCS#1 object.

Usage

From source file:androidGLUESigner.pdf.PDFSignerEngine.java

License:Open Source License

/**
 * Simple Sign method to create a signature without Online Timestamp (needed if device
 * has no internet connection)/*from  w ww.  ja v  a 2  s .co  m*/
 * 
 * @param inputfile the inputfile
 * @param outputfile the outpuftile
 * @param connection the IConnection Object
 */
public void simpleSign(String inputfile, String outputfile, IConnection connection)
        throws IOException, DocumentException, CertificateException, InvalidKeyException,
        NoSuchAlgorithmException, SignatureException, ReaderException {
    try {
        SignatureInfo sigInfo = getSiginfo();
        PdfReader reader = new PdfReader(inputfile);
        FileOutputStream fout = new FileOutputStream(outputfile);
        PdfStamper stp = PdfStamper.createSignature(reader, fout, '\0', null, true);
        PdfSignatureAppearance sap = stp.getSignatureAppearance();
        sap.setCrypto(null, new Certificate[] { getCertificateChain()[0] }, null,
                PdfSignatureAppearance.SELF_SIGNED);
        sap.setReason(sigInfo.getSignatureReason());
        sap.setLocation(sigInfo.getSignatureLocation());

        // get the selected rectangle and pagenumber for visible signature
        Rectangle signatureRect = new Rectangle(siginfo.getSignatureRect().left,
                siginfo.getSignatureRect().bottom, siginfo.getSignatureRect().right,
                siginfo.getSignatureRect().top);
        int pageNumber = siginfo.getPageNumber();
        sap.setVisibleSignature(signatureRect, pageNumber, null);
        // set signature picture, if there is one
        if (siginfo.getSignatureType() == SignatureType.PICTURE) {
            Image obj_pic = Image.getInstance(siginfo.getImagePath());
            sap.setImage(obj_pic);
        }

        sap.setExternalDigest(new byte[256], new byte[20], null);
        sap.preClose();

        java.io.InputStream inp = sap.getRangeStream();
        byte bytesToHash[] = IOUtils.toByteArray(inp);

        // sign the hash value
        byte[] signed = connection.sign(bytesToHash);

        PdfPKCS7 pdfSignature = sap.getSigStandard().getSigner();
        pdfSignature.setExternalDigest(signed, null, "RSA");

        PdfDictionary dic = new PdfDictionary();
        dic.put(PdfName.CONTENTS, new PdfString(pdfSignature.getEncodedPKCS1()).setHexWriting(true));
        sap.close(dic);
    } catch (Exception e) {
        Logger.toConsole(e);
    }
}

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