![]() We won’t use it as a driver/middleware, we will only use pkcs11-tool to read some information off our token It doesn’t matter if OpenSC doesn’t support your token. We use a Safenet eToken 5100 token, which installs the library in /usr/lib/libeTPkcs11.so Different devices will name their libraries differently. This is important because the middleware will also install a PKCS#11 library, which we will need in order to “talk” with the device. Other distributions might be slightly different): The following assumes you already have a working TCPDF installation which you use to create your PDFs.ĭownload and install all the necessary software/packages (the following are based on an Ubuntu installation. At the end of this post, we also give two alternative solutions without the use of TCPDF. TCPDF does not support this kind of integration but, luckily, this can be fixed by making a few small tweaks, as long as your smartcard/token supports the PKCS#11 standard (most do). However, in order for a digital signature to be considered “Qualified” in the European Union (which -technical details aside- means it holds the same value as a handwritten signature) the certificate needs to be stored in a Secure Signature Creation Device, such as a smartcard or a USB token. pdf file that written in Hebrew, libre office didnot solve it correctly and xournal is light.Note: We don't usually post technical articles on our blog, this is an exception due to the difficulty we had in finding information relevant to this topic online, so we felt like sharing our findings.Īdding a digital signature to a PDF file is relatively easy using a library such as TCPDF, as long as your personal certificate is stored somewhere on your server/computer. A flatpak is available in Software Manager, but I have not used it. The process is the same as for Xournal, but the Image button on the toolbar looks like a mountain scene. Xournal++ is a rewrite of Xournal that adds some features. Select Export to PDF from the File menu.Resize and position the image on the PDF.Click on document, and a file browser dialog will open.Click the Image button in the toolbar (it looks like a silhouette of a person) or press Shift+Ctrl+I (that is "I" for Image).Select Annotate PDF from the File menu and select your PDF file to be signed. ![]() It has not seen updates for a long time, but it still works. It can be installed through Software Manager or sudo apt install xournal. QUESTION: Is there a HOWTO or similar for adding line art signatures as a layer? I've not worked with GIMP beyond cropping photos from cameras. QUESTION: What must I do to have a transparent background to an image? Otherwise, I have a large white area around the lines of the writing. When I add it into anything - especially LibreOffice Writer or Scribus - there is a grey hash background. ![]() I've tried to make the background "transparent". I'd love to use a digital signature, but too few of my "audience" are tech-aware enough to deal with that. I simply need to write my name on letters and other documents that I create or review. ![]() I open the PDF with GIMP, add the signature layer, resize as needed, and export as a PDF that is all raster. If you need to keep the PDF in a "vector" format where the text is selectable, I suggest you go with a digital signature:
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