how to Digitally sign mails?

cooljai · 10-03-2007, 11:03 AM

Dear friends,

I want to send digitally signed mails through my PHP/perl scripts. I'm comfortable with using "gpg" tool, after creating my public/pvt keys, I'm able to sign and mail contents of a file using following command:

Code:

 /usr/bin/gpg --no-tty --yes  --local-user $email --clearsign $filename

Now that command will add text " -----BEGIN PGP SIGNED MESSAGE----- " etc. in message and moreover the mail clients are not
detecting it as a signed mail. To verify that mail, I've to cut/paste contents and pass it to gpg again.

I saw some mails which comes in inbox (thunderbird, outlook etc), the mail client automatically detects them as digitally signed mails and show their contents. (without extra text like "--Begin PGP SIGNED.." "--End " etc.)

I need any hint/clue as how to accomplish this using scripts (I'm on CentOS 4.5). Am I able to implement it using GPG or should I concentrate on any other technology (may be S/MIME or digital Certificates/openSSL, though I dont know much about them)

Your expert comments will be highly appreciated.

Thanks

JC

Su-Shee · 10-03-2007, 11:10 AM

Well, I'm no expert, but I darkly remember an existing package for PHP and GPGme mingled together somehow.

This might be it: http://pecl.php.net/package/gnupg

cooljai · 10-04-2007, 07:56 AM

Thanks for reply.

But I think this php gnupg package is just a wrapper to gpg utility. What I am looking to find a method so that I can send digitally signed mails by using scripts and the mail client (outlook/thunderbird) will understand and display them properly.

Thanks