Just a quick public service announcement: Be safe.

Always:

  1. Be mindful of encoding mismatches. If you're stuffing your frozen hash into an HTML/XML attribute value (and it looks like you are), what you are stuffing must conform to SGML/XML CDATA encoding requirements. Is the character encoding that FreezeThaw returns guaranteed to satisfy those requirements? If not, it's your responsibility to encode the frozen data before stuffing it into the attribute value. And on the reverse trip "out" of the value, you must decode it before thawing.
  2. Be paranoid about data from the client. What you get back from the HTTP POST may not be what you placed into your form's hidden field. The data you receive may not be what you were expecting. An attacker may have crafted a value designed to cause you grief. If you want to be safe, sign or encrypt your data on the way out and verify the signature on the way in. Use a key that is only known to your server.

Let's be careful out there.

Cheers,
Tom

Tom Moertel : Blog / Talks / CPAN / LectroTest / PXSL / Coffee / Movie Rating Decoder

In reply to Please remember to be safe. by tmoertel
in thread Pass a hash as parameter to a CGI? by C_T

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