static void krb5_auth_cache_creds(struct krb5_ctx *krb5_ctx,
struct sss_domain_info *domain,
struct confdb_ctx *cdb,
struct pam_data *pd, uid_t uid,
int *pam_status, int *dp_err)
{
const char *password = NULL;
errno_t ret;
if (sss_authtok_get_type(pd->authtok) != SSS_AUTHTOK_TYPE_PASSWORD) {
DEBUG(SSSDBG_MINOR_FAILURE,
"Delayed authentication is only available for password "
"authentication (single factor).\n");
return;
}
ret = sss_authtok_get_password(pd->authtok, &password, NULL);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Failed to get password [%d] %s\n", ret, strerror(ret));
*pam_status = PAM_SYSTEM_ERR;
*dp_err = DP_ERR_OK;
return;
}
ret = sysdb_cache_auth(domain, pd->user,
password, cdb, true, NULL, NULL);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, "Offline authentication failed\n");
*pam_status = cached_login_pam_status(ret);
*dp_err = DP_ERR_OK;
return;
}
ret = add_user_to_delayed_online_authentication(krb5_ctx, pd, uid);
if (ret != EOK) {
/* This error is not fatal */
DEBUG(SSSDBG_CRIT_FAILURE,
"add_user_to_delayed_online_authentication failed.\n");
}
*pam_status = PAM_AUTHINFO_UNAVAIL;
*dp_err = DP_ERR_OFFLINE;
}
static void pam_reply(struct pam_auth_req *preq)
{
struct cli_ctx *cctx;
uint8_t *body;
size_t blen;
int ret;
int32_t resp_c;
int32_t resp_size;
struct response_data *resp;
int p;
struct timeval tv;
struct tevent_timer *te;
struct pam_data *pd;
struct pam_ctx *pctx;
uint32_t user_info_type;
time_t exp_date = -1;
time_t delay_until = -1;
pd = preq->pd;
cctx = preq->cctx;
pctx = talloc_get_type(preq->cctx->rctx->pvt_ctx, struct pam_ctx);
DEBUG(SSSDBG_FUNC_DATA,
"pam_reply called with result [%d].\n", pd->pam_status);
if (pd->pam_status == PAM_AUTHINFO_UNAVAIL) {
switch(pd->cmd) {
case SSS_PAM_AUTHENTICATE:
if ((preq->domain != NULL) &&
(preq->domain->cache_credentials == true) &&
(pd->offline_auth == false)) {
const char *password = NULL;
/* do auth with offline credentials */
pd->offline_auth = true;
if (preq->domain->sysdb == NULL) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Fatal: Sysdb CTX not found for domain"
" [%s]!\n", preq->domain->name);
goto done;
}
ret = sss_authtok_get_password(pd->authtok, &password, NULL);
if (ret) {
DEBUG(SSSDBG_FATAL_FAILURE, "Failed to get password.\n");
goto done;
}
ret = sysdb_cache_auth(preq->domain,
pd->user, password,
pctx->rctx->cdb, false,
&exp_date, &delay_until);
pam_handle_cached_login(preq, ret, exp_date, delay_until);
return;
}
break;
case SSS_PAM_CHAUTHTOK_PRELIM:
case SSS_PAM_CHAUTHTOK:
DEBUG(SSSDBG_FUNC_DATA,
"Password change not possible while offline.\n");
pd->pam_status = PAM_AUTHTOK_ERR;
user_info_type = SSS_PAM_USER_INFO_OFFLINE_CHPASS;
ret = pam_add_response(pd, SSS_PAM_USER_INFO, sizeof(uint32_t),
(const uint8_t *) &user_info_type);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, "pam_add_response failed.\n");
goto done;
}
break;
/* TODO: we need the pam session cookie here to make sure that cached
* authentication was successful */
case SSS_PAM_SETCRED:
case SSS_PAM_ACCT_MGMT:
case SSS_PAM_OPEN_SESSION:
case SSS_PAM_CLOSE_SESSION:
DEBUG(SSSDBG_OP_FAILURE,
"Assuming offline authentication setting status for "
"pam call %d to PAM_SUCCESS.\n", pd->cmd);
pd->pam_status = PAM_SUCCESS;
break;
default:
DEBUG(SSSDBG_CRIT_FAILURE, "Unknown PAM call [%d].\n", pd->cmd);
pd->pam_status = PAM_MODULE_UNKNOWN;
}
}
if (pd->response_delay > 0) {
ret = gettimeofday(&tv, NULL);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, "gettimeofday failed [%d][%s].\n",
errno, strerror(errno));
goto done;
}
tv.tv_sec += pd->response_delay;
tv.tv_usec = 0;
pd->response_delay = 0;
te = tevent_add_timer(cctx->ev, cctx, tv, pam_reply_delay, preq);
if (te == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE,
"Failed to add event pam_reply_delay.\n");
goto done;
}
return;
}
/* If this was a successful login, save the lastLogin time */
if (pd->cmd == SSS_PAM_AUTHENTICATE &&
pd->pam_status == PAM_SUCCESS &&
preq->domain->cache_credentials &&
!pd->offline_auth &&
!pd->last_auth_saved &&
NEED_CHECK_PROVIDER(preq->domain->provider)) {
ret = set_last_login(preq);
if (ret != EOK) {
goto done;
}
return;
}
ret = sss_packet_new(cctx->creq, 0, sss_packet_get_cmd(cctx->creq->in),
&cctx->creq->out);
if (ret != EOK) {
goto done;
}
ret = filter_responses(pctx->rctx->cdb, pd->resp_list);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, "filter_responses failed, not fatal.\n");
}
if (pd->domain != NULL) {
ret = pam_add_response(pd, SSS_PAM_DOMAIN_NAME, strlen(pd->domain)+1,
(uint8_t *) pd->domain);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, "pam_add_response failed.\n");
goto done;
}
}
resp_c = 0;
resp_size = 0;
resp = pd->resp_list;
while(resp != NULL) {
if (!resp->do_not_send_to_client) {
resp_c++;
resp_size += resp->len;
}
resp = resp->next;
}
ret = sss_packet_grow(cctx->creq->out, sizeof(int32_t) +
sizeof(int32_t) +
resp_c * 2* sizeof(int32_t) +
resp_size);
if (ret != EOK) {
goto done;
}
sss_packet_get_body(cctx->creq->out, &body, &blen);
DEBUG(SSSDBG_FUNC_DATA, "blen: %zu\n", blen);
p = 0;
memcpy(&body[p], &pd->pam_status, sizeof(int32_t));
p += sizeof(int32_t);
memcpy(&body[p], &resp_c, sizeof(int32_t));
p += sizeof(int32_t);
resp = pd->resp_list;
while(resp != NULL) {
if (!resp->do_not_send_to_client) {
memcpy(&body[p], &resp->type, sizeof(int32_t));
p += sizeof(int32_t);
memcpy(&body[p], &resp->len, sizeof(int32_t));
p += sizeof(int32_t);
memcpy(&body[p], resp->data, resp->len);
p += resp->len;
}
resp = resp->next;
}
done:
sss_cmd_done(cctx, preq);
}
