I want to store an encrypted string in a cookie.
I will keep a key stored in a config file or database
I want to be able to decrypt the string after reading the cookie
I want to use the stored key to decrypt back to readable string
I would like to use pure perl or lightweight module or use a module that is already called in my script.
I already use this for something else:
Crypt::PasswdMD5 qw(unix_md5_crypt);
any suggestions?
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You can build a Feistel cipher out of a one-way hash function,
but you may be better off with a pure perl module designed for encryption
http://search.cpan.org/~si
http://search.cpan.org/~gu
http://search.cpan.org/~ma
http://search.cpan.org/~gu
http://search.cpan.org/~oy
http://search.cpan.org/~de
http://search.cpan.org/~bo
I wrote a Perl/CGI application that has an admin page that you login and it sets an encrypted cookie.
I use Crypt::Tea (Tiny Encryption Algorithms), as it is very light weight as is written in pure Perl.
To encrypt, I do:
use Crypt::Tea;
my $user = 'username';
my $password = 'password';
my $key = 'somekey';
$user = encrypt($user,$key);
$password = encrypt($password,$key);
# Turn it into a usable format for cookies
$user = unpack("H*",$user);
$password = unpack("H*",$password);
It's a similar process for decrypting.
This is what I was looking for. Should be noted that other modules listed will work but this is the smallest.
Full Usage:
use Crypt::Tea;
my $user = 'username';
my $password = 'password';
my $key = 'somekey';
$user = encrypt($user,$key);
$password = encrypt($password,$key);
# Turn it into a usable format for cookies
$user = unpack("H*",$user);
$password = unpack("H*",$password);
# Get from cookie and pack
$user = pack("H*",$user);
$password = pack("H*",$password);
$user = decrypt($user,$key);
$password = decrypt($password,$key);
Business Accounts
Answer for Membership
by: Adam314Posted on 2007-07-27 at 14:30:46ID: 19582531
The Crypt::PasswdMD5 is a one-way crypt - meaning you can't get the original back.
I'm not sure if either of these are pure perl, but take a look:
http://search.cpan.org/~dp
http://search.cpan.org/~dp