Hi there,

I use a very bit of ezcAuthentication in my CAPTCHA extension for eZ4, 
and decided to use my own wrapper function for encryption (instead of 
directly calling sha1 or md5). Here it hoes:

--- code:
$credentials = new ezcAuthenticationIdCredentials( $captcha );
$authentication = new ezcAuthentication( $credentials );
$authentication->addFilter(
        new ezcAuthenticationTokenFilter(
                $encryptedToken,
                'eZHumanCAPTCHATools::encryptToken'
        )
);
---

eZHumanCAPTCHATools::encryptToken is a public static method in the very 
same class, where this authentication is initiated.

On one system I have it working great, on another one (almost identical 
when it comes to system, configuration, versions) I get eZ debugger message:

--- msg:
call_user_func(eZHumanCAPTCHATools::encryptToken) [<a 
href='function.call-user-func'>function.call-user-func</a>]: Unable to 
call eZHumanCAPTCHATools::encryptToken(kecxw) in 
/usr/share/php/ezc/Authentication/filters/token/token_filter.php on line 194
---

What could be the reason for such difference?
Seems like a scope problem?

I would be grateful for any suggestions,
Thanks,

Piotrek
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