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/*
*
* auth_mellon_session.c: an authentication apache module
* Copyright 2003-2007 UNINETT (http://www.uninett.no/)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "auth_mellon.h"
/* Retrieve a session from the cache and validate its cookie settings
*
* Parameters:
* request_rec *r The request we received from the user.
* am_cache_key_t type AM_CACHE_SESSION or AM_CACHE_NAMEID
* const char *key The session key or user
*
* Returns:
* The session associated, or NULL if unable to retrieve the given session.
*/
am_cache_entry_t *am_lock_and_validate(request_rec *r,
am_cache_key_t type,
const char *key)
{
am_cache_entry_t *session = am_cache_lock(r->server, type, key);
if (session == NULL) {
return NULL;
}
const char *cookie_token_session = am_cache_entry_get_string(
session, &session->cookie_token);
const char *cookie_token_target = am_cookie_token(r);
if (strcmp(cookie_token_session, cookie_token_target)) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"Session cookie parameter mismatch. "
"Session created with {%s}, but current "
"request has {%s}.",
cookie_token_session,
cookie_token_target);
am_cache_unlock(r->server, session);
return NULL;
}
return session;
}
/* This function gets the session associated with a user, using a cookie
*
* Parameters:
* request_rec *r The request we received from the user.
*
* Returns:
* The session associated with the user who places the request, or
* NULL if we don't have a session yet.
*/
am_cache_entry_t *am_get_request_session(request_rec *r)
{
const char *session_id;
/* Get session id from cookie. */
session_id = am_cookie_get(r);
if(session_id == NULL) {
/* Cookie is unset - we don't have a session. */
return NULL;
}
return am_lock_and_validate(r, AM_CACHE_SESSION, session_id);
}
/* This function gets the session associated with a user, using a NameID
*
* Parameters:
* request_rec *r The request we received from the user.
* char *nameid The NameID
*
* Returns:
* The session associated with the user who places the request, or
* NULL if we don't have a session yet.
*/
am_cache_entry_t *am_get_request_session_by_nameid(request_rec *r, char *nameid)
{
return am_lock_and_validate(r, AM_CACHE_NAMEID, nameid);
}
/* This function creates a new session.
*
* Parameters:
* request_rec *r The request we are processing.
*
* Returns:
* The new session, or NULL if we have an internal error.
*/
am_cache_entry_t *am_new_request_session(request_rec *r)
{
const char *session_id;
/* Generate session id. */
session_id = am_generate_id(r);
if(session_id == NULL) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
"Error creating session id.");
return NULL;
}
/* Set session id. */
am_cookie_set(r, session_id);
const char *cookie_token = am_cookie_token(r);
return am_cache_new(r->server, session_id, cookie_token);
}
/* This function releases the session which was returned from
* am_get_request_session.
*
* Parameters:
* request_rec *r The request we are processing.
* am_cache_entry_t *session The session we are releasing.
*
* Returns:
* Nothing.
*/
void am_release_request_session(request_rec *r, am_cache_entry_t *session)
{
am_cache_unlock(r->server, session);
}
/* This function releases and deletes the session which was returned from
* am_get_request_session.
*
* Parameters:
* request_rec *r The request we are processing.
* am_cache_entry_t *session The session we are deleting.
*
* Returns:
* Nothing.
*/
void am_delete_request_session(request_rec *r, am_cache_entry_t *session)
{
/* Delete the cookie. */
am_cookie_delete(r);
if(session == NULL) {
return;
}
/* Delete session from the session store. */
am_cache_delete(r->server, session);
}
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