How to set account expiry date in openldap

I wish to implement a new account policy in openldap that allow an administrator to set expiry date of user accounts. However, I can't find any related attribute in the object classes.

This is nothing related to password attributes like pwdMaxAge. The usage of this policy is for a subscription service. Once user has subscribed the server for a certain period, the administrator will set the account expiry date where subscription ends. User is authenticated if before expiry date and will fail to authenticated beyond the expiry da开发者_开发技巧te.

Is that possible to do so in openldap? I google and found that Microsoft's ActiveDirectory has AccountExpirationDate attribute.

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There's no direct support for account expiration in OpenLDAP or it's overlays (not even in contrib/).

Howard Chu suggests using ppolicy's pwdMaxAge for this, which can be made to work, but I've found this less than ideal: If you're already using ppolicy for expiring passwords (in addition to expiring accounts), it will conflict with those settings and if you've configured grace logins (the sane thing to do), the user can change his password and thus reset the expiration timer.

So it seems the best way to implement this (and a good way it is not) is by running an external task that sets the (ppolicy attribute) pwdAccountLockedTime to the magic number that indicates a manually locked account, which cannot be unlocked by the user.

pwdAccountLockedTime

This attribute contains the time that the user's account was locked. If the account has been locked, the password may no longer be used to authenticate the user to the directory. If pwdAccountLockedTime is set to 000001010000Z, the user's account has been permanently locked and may only be unlocked by an administrator. Note that account locking only takes effect when the pwdLockout password policy attribute is set to "TRUE".

This external task (a cronjob, most likely) could be implemented in such a way that it reads the expiration date/time from a custom attribute (e.g. expirationTime) on the user record as it loops over them. That way you could store the expiration time/date on the user record, but of course the lockout relies entirely on this external task running.

Or you could write your own overlay.

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Have a look at the Password Policy extension. It is supported from OpenLDAP 2.3 onwards. You may need to write some code to implement the required extended request/response controls.

If you're using OpenLDAP, you can use the dynamic objects overlay. Add objectClass=dynamicObject when creating the account, and set an appropriate entryTTL via the dynamic object refresh request.

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Use shadowExpire if the user account is of type shadowAccount

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without getting to detailed - take a look at the PPolicy overlay mentioned above. It works. And you are correct, there is no "account expire time" like there is in AD.

One solution is to run a script that calculates the age of the account and add/modify the user attribute pwdPolicySubentry and set it to the DN of a policy that expires any password that is 1 second old and does not allow the user to change the password.

No client will get around that, and yet the user entry remains virtually intact.