Forum LAMS for Tech-Heads - General Forum: Re: Re: Re: Integration - Single sign on questions

Apurva and I are still a bit unsure of the hash value and how to create it.

-- "The hash is what LAMS uses for authenticating the user and verifying that he/she is coming from the right place. (this is the single sign-on mechanism we use" --

How do we construct the hash? We've tried generating our own and also looking at the Moodle integration code but its not very clear.

-- from the moodle/lams code
$plaintext = trim($datetime).trim($USER->username).trim
($CONSTANTS->author_method).trim($CFG->lams_serverid).trim($CFG->lams_serverkey);

$hash = sha1(strtolower($plaintext));

It appears to be the concatenation of: the datetime, username, author method??(what is this?), the server id and the server key.

Then the result is converted to lowercase and the sha hash function performed on it.

Most of the values appear to be ok, the one that doesn't make sense is the author_method.

Thanks for you quick response,
Scott.

Posted by Scott Bradley