password-protection

Possible Duplicate: How to password protect an uploaded pdf in PHP I have a web app where users can upload pdf documents. Is there a php library that I can use to password protect the pdf file? I need the library to preserve all aspects of the original pdf (i.e. size, fonts, resolution, etc). Favourite Onwuemene Download the library used: Protect PDF in PHP <?php function pdfEncrypt ($origFile, $password, $destFile){ //include the FPDI protection http://www.setasign.de/products/pdf-php-solutions/fpdi-protection-128/ require_once('fpdi/FPDI_Protection.php'); $pdf =& new FPDI_Protection(); //

If I use a password as a command-line parameter it's public on the system using ps . But if I'm in a bash shell script and I do something like: ... { somecommand -p mypassword } ... is this still going to show up in the process list? Or is this safe? How about sub-processes: (...)? Unsafe right? coprocess? Command lines will always be visible (if only through /proc). So the only real solution is: don't. You might supply it on stdin, or a dedicated fd: ./my_secured_process some parameters 3<<< "b@dP2ssword" with a script like (simplicity first) #!/bin/bash cat 0<&3 (this sample would just dump

This question already has an answer here: Handling passwords used for auth in source code 5 answers Assuming that a password for a keystore is not supplied by or bound to a user password (which more or less means its just a String or Array[] in the code somewhere), is it a sufficient protection that it just cannot or can only hardly be extracted out of the bytecode? I know that the password for a keystore (JKS / BKS) is just used to verify the integrity of the keystore. Furthermore it is totally clear that I have to assume that an application runs in a more or less trusted environment to be