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/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, and the entire permission notice in its entirety,
* including the disclaimer of warranties.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* ALTERNATIVELY, this product may be distributed under the terms of
* the GNU Public License, in which case the provisions of the GPL are
* required INSTEAD OF the above restrictions. (This clause is
* necessary due to a potential bad interaction between the GPL and
* the restrictions contained in a BSD-style copyright.)
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "pam_private.h"
#include <stdlib.h>
#include <string.h>
static struct pam_data *_pam_locate_data(const pam_handle_t *pamh,
const char *name)
{
struct pam_data *data;
D(("called"));
IF_NO_PAMH(pamh, NULL);
data = pamh->data;
while (data) {
if (!strcmp(data->name, name)) {
return data;
}
data = data->next;
}
return NULL;
}
int pam_set_data(
pam_handle_t *pamh,
const char *module_data_name,
void *data,
void (*cleanup)(pam_handle_t *pamh, void *data, int error_status))
{
struct pam_data *data_entry;
D(("called"));
IF_NO_PAMH(pamh, PAM_SYSTEM_ERR);
if (__PAM_FROM_APP(pamh)) {
D(("called from application!?"));
return PAM_SYSTEM_ERR;
}
/* module_data_name should not be NULL */
if (module_data_name == NULL) {
D(("called with NULL as module_data_name"));
return PAM_SYSTEM_ERR;
}
/* first check if there is some data already. If so clean it up */
if ((data_entry = _pam_locate_data(pamh, module_data_name))) {
if (data_entry->cleanup) {
data_entry->cleanup(pamh, data_entry->data,
PAM_DATA_REPLACE | PAM_SUCCESS );
}
} else if ((data_entry = malloc(sizeof(*data_entry)))) {
char *tname;
if ((tname = _pam_strdup(module_data_name)) == NULL) {
pam_syslog(pamh, LOG_CRIT,
"pam_set_data: no memory for data name");
_pam_drop(data_entry);
return PAM_BUF_ERR;
}
data_entry->next = pamh->data;
pamh->data = data_entry;
data_entry->name = tname;
} else {
pam_syslog(pamh, LOG_CRIT,
"pam_set_data: cannot allocate data entry");
return PAM_BUF_ERR;
}
data_entry->data = data; /* note this could be NULL */
data_entry->cleanup = cleanup;
return PAM_SUCCESS;
}
int pam_get_data(
const pam_handle_t *pamh,
const char *module_data_name,
const void **datap)
{
struct pam_data *data;
D(("called"));
IF_NO_PAMH(pamh, PAM_SYSTEM_ERR);
if (__PAM_FROM_APP(pamh)) {
D(("called from application!?"));
return PAM_SYSTEM_ERR;
}
/* module_data_name should not be NULL */
if (module_data_name == NULL) {
D(("called with NULL as module_data_name"));
return PAM_SYSTEM_ERR;
}
data = _pam_locate_data(pamh, module_data_name);
if (data) {
*datap = data->data;
return PAM_SUCCESS;
}
return PAM_NO_MODULE_DATA;
}
void _pam_free_data(pam_handle_t *pamh, int status)
{
struct pam_data *last;
struct pam_data *data;
D(("called"));
IF_NO_PAMH(pamh, /* no return value for void fn */);
data = pamh->data;
while (data) {
last = data;
data = data->next;
if (last->cleanup) {
last->cleanup(pamh, last->data, status);
}
_pam_drop(last->name);
_pam_drop(last);
}
}
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