public PdfSignature(PdfName filter,
    PdfName subFilter) 
{
        super(PdfName.SIG);
        put(PdfName.FILTER, filter);
        put(PdfName.SUBFILTER, subFilter);
}

Creates new PdfSignature

 public  void setByteRange(int[] range) 
{
        PdfArray array = new PdfArray();
        for (int k = 0; k <  range.length; ++k)
            array.add(new PdfNumber(range[k]));
        put(PdfName.BYTERANGE, array);
}

 public  void setCert(byte[] cert) 
{
        put(PdfName.CERT, new PdfString(cert));
}

 public  void setContact(String name) 
{
        put(PdfName.CONTACTINFO, new PdfString(name, PdfObject.TEXT_UNICODE));
}

 public  void setContents(byte[] contents) 
{
        put(PdfName.CONTENTS, new PdfString(contents).setHexWriting(true));
}

 public  void setDate(PdfDate date) 
{
        put(PdfName.M, date);
}

 public  void setLocation(String name) 
{
        put(PdfName.LOCATION, new PdfString(name, PdfObject.TEXT_UNICODE));
}

 public  void setName(String name) 
{
        put(PdfName.NAME, new PdfString(name, PdfObject.TEXT_UNICODE));
}

 public  void setReason(String name) 
{
        put(PdfName.REASON, new PdfString(name, PdfObject.TEXT_UNICODE));
}