|SANE_Status||sanei_authorize (const char *resource, const char *backend, SANE_Auth_Callback authorize)|
|Check authorization for a resource. |
This file implements an interface for user authorization. The authorization call is forwarded to the frontend which asks for a username and password. An MD5 digest is used if supported by the frontend.
|SANE_Status sanei_authorize||(||const char *||resource,|
|const char *||backend,|
Check authorization for a resource.
This function looks for the file SANE_CONFIG_DIR/backend.users. If this file doesn't exist, sanei_authorize always returns SANE_STATUS_GOOD. The file backend.users contains a list of usernames, passwords, and resources:
If the requested resource isn't listed in this file, sanei_authorize return SANE_SATUS_GOOD. In all other cases, sanei_authorize sends a challenge to the frontend of the form
where randomstring consists of the PID, the time, and some random characters. It accepts two forms of answers
std: username:password md5: username:$MD5$m5digest
where md5digest is md5(randomstring password).
If this username/password/resource triple is listed in backend.users sanei_authorize returns SANE_STATUS_GOOD, in all other cases it returns SANE_STATUS_ACCESS_DENIED.
|resource||resource to authorize|