Thread: read from file commands???

  1. #1
    Registered User
    Join Date
    Nov 2001

    Unhappy read from file commands???

    I'm using OpenSSL(an application in Linux OS) to setup a Certification Authority (CA). I have setup the CA and I'm also able to create Digital Certificates. Users need to input their details interactively / line by line because OpenSSL is command lines only.
    My problem is, I want to create an interface so that users need not input theirs details interactively, all they need to do is just fill in the form and click submit. When submit is clicked, the input data will be written to a text file.
    And when another button is clicked, OpenSSL must read from the text file and create the Digital Certificate. How can i do this task? Or please give me any ideas how to replace the command lines with an interface.

  2. #2
    Registered User
    Join Date
    Aug 2001
    If I were to impliment this, I would use perl.

    Make your form in html, asking for the fields that you need, and have a perl program grab those parameters, and ten use back-quotes and variable substitution when executing OpenSSL. This should let you bypass writing to the file, and avoid unnecessary overhead while giving your users the simplicity that they'll need.

    Hope this helps.


  3. #3
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    After creating your text file, then something simple like

    system( "openssl < file.txt > results.log 2>errors.log" );

    should work (providing it reads stdin, and not the terminal directly).

    stdout and stderr are redirected to log files for later use.

    Or perhaps something like this
    would help, if the interaction is particularly complicated.

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