/* 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 = NULL;
am_diag_printf(r, "searching for session with key %s (%s) ... ",
key, am_diag_cache_key_type_str(type));
session = am_cache_lock(r, type, key);
if (session == NULL) {
am_diag_printf(r, "not found\n");
return NULL;
} else {
am_diag_printf(r, "found.\n");
am_diag_log_cache_entry(r, 0, session, "Session Cache Entry");
}
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)) {
AM_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, session);
return NULL;
}
return session;
}
/* This function deletes a given key from the session store.
*
* Parameters:
* server_rec *s The current server.
* am_cache_entry_t *cache The entry we are deleting.
*
* Returns:
* Nothing.
*/
void am_cache_delete(server_rec *s, am_cache_entry_t *cache)
{
/* We write a null-byte at the beginning of the key to
* mark this slot as unused.
*/
cache->key[0] = '\0';
/* Unlock the entry. */
am_cache_unlock(s, cache);
}
/* 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, session);
}
