This has been working for me while the IT team tris to figure out how to prevent the scanninf tool from "modifying" the attachment files. This way they scanning tool can't access the file and won't change it, so the signature will remain intact. Due to the hash change (probably triggered by a change in the file) the file naturally loses its signature (my guess is that the scanning tool is somehow "marking" the file safe or unsafe, but I can't say for sure).īut there is a workaround that worked for me: when sending digital signed files put them inside a ZIP (or RAR or any other format) file with password. I calculated their hash codes before being sent and after being sent and the hash code changed everytime. Quiet mode is enabled so no debug info is printed.Turns out it was a problem with my company scanning tool: After scanned the attached files in a e-mail would lose their digital signatures.Īfter a few tests I found out why: the files were being "changed". For signature is used key with alias cert23 from the file my_certificate.pfx\r\n-\r\n$ java -jar JSignPdf.jar -lkt\r\n-> lists keystore types\r\n-\r\n$ java -jar JSignPdf.jar -kst PKCS12 -ksf my_certificate.pfx -ksp myVeryPrivatePassword -lk -q\r\n-> list names (aliases) of keys stored in my_certificate.pfx file using the password for keystore. Furthermore, you can find the Troubleshooting Login Issues section which can answer your unresolved problems and equip you with a lot of relevant information. LoginAsk is here to help you access Jsignpdf quickly and handle each specific case you encounter. Hlp.footer = \r\nExamples:\r\n-\r\n$ java -jar JSignPdf.jar -kst WINDOWS-MY mydocument.pdf\r\n-> creates copy of mydocument.pdf with name mydocument_signed.pdf, which is digitally signed with the first certificate found in default windows certificate store\r\n-\r\n$ java -jar JSignPdf.jar -kst PKCS12 -ksf my_certificate.pfx -ksp myPrivateKeystorePassword -ka cert23 -e -opwd xxx123 -upwd 123xxx -pr DISALLOW_PRINTING mydocument.pdf\r\n-> creates signed and encrypted file mydocument_signed.pdf, printing of the new file is not allowed. Jsignpdf will sometimes glitch and take you a long time to try different solutions. Use this option together with -opwd and -upwd. Hlp.encrypted = enables pdf encryption and allows to set user rights. Hlp.disableScrRead = deny screen readers in encrypted documents Hlp.disableFill = deny fill encrypted documents Hlp.disableCopy = deny copy in encrypted documents Update 17: Since last December you can sign PDF files with LibreOffice by going File Digital. As far as I can tell, Acrobat Reader for Android says the document is protected, for what its worth. I also like JSignPdf as it provides various certificate based digital signature options. If you have the certificate available in Writer and if using its Export to PDF function, you can also digitally sign the resulting PDF from the last tab of the dialog right before the export. Hlp.disableContent = deny modify content in encrypted documents You will find dedicated digital signature software, PDF readers. If the checkbox is checked, button Settings is. Hlp.disableAssembly = deny assembly in encrypted documents Checkbox Visible signature allows you to create a visible field with signature directly in the signed. Hlp.disableAnnot = deny modify annotations in encrypted documents I created language file for Japanese briefly (means only GUI).įor signature text, its font must be replaced from pokrytie.ttf to Japanese font like ipagp.ttf.Īnd rewrite "Constants.java" L2TEXT_FONT_PATH and L2TEXT_FONT_NAME settings.
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