Mac OS X Credential Provider equivalent

Question

Is there an equivalent API for Mac OS X of the CredentialProvider API under Windows?

Answer 1

Although it's quite late to answer the question I hope it helps some one who is trying to find answer to same question. In MacOS it is called Authorization Plugin. In MacOS authorization is done basing on authorizationdb which has policies you add a policy to the authorization policy database, it can refer to any number of plug-ins(authorization plugin). Each plug-in includes one or more authorization mechanisms, where a mechanism is a code module that performs one step in the authorization process. All these policies need to agree and then the user logs in.