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/*
SSSD
Utilities to for tha pam_data structure
Authors:
Sumit Bose <sbose@redhat.com>
Copyright (C) 2009 Red Hat
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "providers/data_provider.h"
#define PAM_SAFE_ITEM(item) item ? item : "not set"
static const char *pamcmd2str(int cmd) {
switch (cmd) {
case SSS_PAM_AUTHENTICATE:
return "PAM_AUTHENTICATE";
case SSS_PAM_SETCRED:
return "PAM_SETCRED";
case SSS_PAM_ACCT_MGMT:
return "PAM_ACCT_MGMT";
case SSS_PAM_OPEN_SESSION:
return "PAM_OPEN_SESSION";
case SSS_PAM_CLOSE_SESSION:
return "PAM_CLOSE_SESSION";
case SSS_PAM_CHAUTHTOK:
return "PAM_CHAUTHTOK";
case SSS_PAM_CHAUTHTOK_PRELIM:
return "PAM_CHAUTHTOK_PRELIM";
default:
return "UNKNOWN";
}
}
int pam_data_destructor(void *ptr)
{
struct pam_data *pd = talloc_get_type(ptr, struct pam_data);
/* make sure to wipe any password from memory before freeing */
sss_authtok_wipe_password(pd->authtok);
sss_authtok_wipe_password(pd->newauthtok);
return 0;
}
struct pam_data *create_pam_data(TALLOC_CTX *mem_ctx)
{
struct pam_data *pd;
pd = talloc_zero(mem_ctx, struct pam_data);
if (pd == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "talloc_zero failed.\n");
goto failed;
}
pd->authtok = sss_authtok_new(pd);
if (pd->authtok == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "talloc_zero failed.\n");
goto failed;
}
pd->newauthtok = sss_authtok_new(pd);
if (pd->newauthtok == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, "talloc_zero failed.\n");
goto failed;
}
talloc_set_destructor((TALLOC_CTX *) pd, pam_data_destructor);
return pd;
failed:
talloc_free(pd);
return NULL;
}
errno_t copy_pam_data(TALLOC_CTX *mem_ctx, struct pam_data *src,
struct pam_data **dst)
{
struct pam_data *pd = NULL;
errno_t ret;
pd = create_pam_data(mem_ctx);
if (pd == NULL) {
ret = ENOMEM;
goto failed;
}
pd->cmd = src->cmd;
pd->priv = src->priv;
pd->domain = talloc_strdup(pd, src->domain);
if (pd->domain == NULL && src->domain != NULL) {
ret = ENOMEM;
goto failed;
}
pd->user = talloc_strdup(pd, src->user);
if (pd->user == NULL && src->user != NULL) {
ret = ENOMEM;
goto failed;
}
pd->service = talloc_strdup(pd, src->service);
if (pd->service == NULL && src->service != NULL) {
ret = ENOMEM;
goto failed;
}
pd->tty = talloc_strdup(pd, src->tty);
if (pd->tty == NULL && src->tty != NULL) {
ret = ENOMEM;
goto failed;
}
pd->ruser = talloc_strdup(pd, src->ruser);
if (pd->ruser == NULL && src->ruser != NULL) {
ret = ENOMEM;
goto failed;
}
pd->rhost = talloc_strdup(pd, src->rhost);
if (pd->rhost == NULL && src->rhost != NULL) {
ret = ENOMEM;
goto failed;
}
pd->cli_pid = src->cli_pid;
/* if structure pam_data was allocated on stack and zero initialized,
* than src->authtok and src->newauthtok are NULL, therefore
* instead of copying, new empty authtok will be created.
*/
if (src->authtok) {
ret = sss_authtok_copy(src->authtok, pd->authtok);
if (ret) {
goto failed;
}
} else {
pd->authtok = sss_authtok_new(pd);
if (pd->authtok == NULL) {
ret = ENOMEM;
goto failed;
}
}
if (src->newauthtok) {
ret = sss_authtok_copy(src->newauthtok, pd->newauthtok);
if (ret) {
goto failed;
}
} else {
pd->newauthtok = sss_authtok_new(pd);
if (pd->newauthtok == NULL) {
ret = ENOMEM;
goto failed;
}
}
*dst = pd;
return EOK;
failed:
talloc_free(pd);
DEBUG(SSSDBG_CRIT_FAILURE,
"copy_pam_data failed: (%d) %s.\n", ret, strerror(ret));
return ret;
}
void pam_print_data(int l, struct pam_data *pd)
{
DEBUG(l, "command: %s\n", pamcmd2str(pd->cmd));
DEBUG(l, "domain: %s\n", PAM_SAFE_ITEM(pd->domain));
DEBUG(l, "user: %s\n", PAM_SAFE_ITEM(pd->user));
DEBUG(l, "service: %s\n", PAM_SAFE_ITEM(pd->service));
DEBUG(l, "tty: %s\n", PAM_SAFE_ITEM(pd->tty));
DEBUG(l, "ruser: %s\n", PAM_SAFE_ITEM(pd->ruser));
DEBUG(l, "rhost: %s\n", PAM_SAFE_ITEM(pd->rhost));
DEBUG(l, "authtok type: %d\n", sss_authtok_get_type(pd->authtok));
DEBUG(l, "newauthtok type: %d\n", sss_authtok_get_type(pd->newauthtok));
DEBUG(l, "priv: %d\n", pd->priv);
DEBUG(l, "cli_pid: %d\n", pd->cli_pid);
DEBUG(l, "logon name: %s\n", PAM_SAFE_ITEM(pd->logon_name));
}
int pam_add_response(struct pam_data *pd, enum response_type type,
int len, const uint8_t *data)
{
struct response_data *new;
new = talloc(pd, struct response_data);
if (new == NULL) return ENOMEM;
new->type = type;
new->len = len;
new->data = talloc_memdup(pd, data, len);
if (new->data == NULL) return ENOMEM;
new->do_not_send_to_client = false;
new->next = pd->resp_list;
pd->resp_list = new;
return EOK;
}
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