[SOLVED] How to set sha1 hash in cookie on redirect?

How to set sha1 hash in cookie on redirect?

I need to set a sha1 hash in a cookie on redirect that I can check on every further request.

As far as I can see I can only set a Cookie on redirect with a RewriteRule:

RewriteRule ^(needCheck)$ /check [L,R=302,CO=myCookie:${sha1(%{myVar})}:.mydomain.com]

But this is not possible as I have no access to sha1 function in this context. But I can use an external function with a RewriteMap. Something like

RewriteMap sha1_map prg:/var/www/mydomain/sha1.sh
RewriteRule ^(needCheck)$ /check [L,R=302,CO=myCookie:${sha1_map:%{myVar}}:.mydomain.com]

But I cannot figure out how to write the external function, so that the sha1 hash matches the one generated by Apache. Can someone give me a hint?

Any further requests check the hash with <If "sha1('%{myVar}') == ...>

Or can I achieve this simplier? Thanks for any help.

Solution

To answer myself. Yes, it works right like that. My sha1.sh was wrong. It should be

#!/bin/bash

while IFS= read -r line; do
   echo -n $line | sha1sum | awk '{print $1}'\n
done

Then the hash is equal.