static struct tevent_req *
cache_req_initgroups_by_upn_dp_send(TALLOC_CTX *mem_ctx,
struct cache_req *cr,
struct cache_req_data *data,
struct sss_domain_info *domain,
struct ldb_result *result)
{
return sss_dp_get_account_send(mem_ctx, cr->rctx, domain, true,
SSS_DP_INITGROUPS, cr->data->name.lookup,
0, EXTRA_NAME_IS_UPN);
}
static struct tevent_req *
cache_req_user_by_filter_dp_send(TALLOC_CTX *mem_ctx,
struct cache_req *cr,
struct cache_req_data *data,
struct sss_domain_info *domain,
struct ldb_result *result)
{
return sss_dp_get_account_send(mem_ctx, cr->rctx, domain, true,
SSS_DP_WILDCARD_USER, cr->data->name.lookup,
cr->data->id, NULL);
}
static errno_t
ssh_user_pubkeys_search(struct ssh_cmd_ctx *cmd_ctx)
{
struct tevent_req *req;
struct dp_callback_ctx *cb_ctx;
/* if it is a domainless search, skip domains that require fully
* qualified names instead */
while (cmd_ctx->domain && cmd_ctx->check_next && cmd_ctx->domain->fqnames) {
cmd_ctx->domain = get_next_domain(cmd_ctx->domain, false);
}
if (!cmd_ctx->domain) {
DEBUG(SSSDBG_OP_FAILURE,
"No matching domain found for [%s], fail!\n", cmd_ctx->name);
return ssh_user_handle_not_found(cmd_ctx->name);
}
talloc_zfree(cmd_ctx->fqdn);
cmd_ctx->fqdn = sss_resp_create_fqname(cmd_ctx, cmd_ctx->cctx->rctx,
cmd_ctx->domain, false, cmd_ctx->name);
if (cmd_ctx->fqdn == NULL) {
return ENOMEM;
}
/* refresh the user's cache entry */
if (NEED_CHECK_PROVIDER(cmd_ctx->domain->provider)) {
req = sss_dp_get_account_send(cmd_ctx, cmd_ctx->cctx->rctx,
cmd_ctx->domain, false, SSS_DP_USER,
cmd_ctx->fqdn, 0, NULL);
if (!req) {
DEBUG(SSSDBG_CRIT_FAILURE,
"Out of memory sending data provider request\n");
return ENOMEM;
}
cb_ctx = talloc_zero(cmd_ctx, struct dp_callback_ctx);
if (!cb_ctx) {
talloc_zfree(req);
return ENOMEM;
}
cb_ctx->callback = ssh_user_pubkeys_search_dp_callback;
cb_ctx->ptr = cmd_ctx;
cb_ctx->cctx = cmd_ctx->cctx;
cb_ctx->mem_ctx = cmd_ctx;
tevent_req_set_callback(req, ssh_dp_send_req_done, cb_ctx);
/* tell caller we are in an async call */
return EAGAIN;
}
static struct tevent_req *
cache_req_group_by_name_dp_send(TALLOC_CTX *mem_ctx,
struct cache_req *cr,
struct cache_req_data *data,
struct sss_domain_info *domain,
struct ldb_result *result)
{
const char *string;
const char *flag;
uint32_t id;
errno_t ret;
ret = cache_req_group_by_name_dpreq_params(mem_ctx, cr, result,
&string, &id, &flag);
if (ret != EOK) {
return NULL;
}
return sss_dp_get_account_send(mem_ctx, cr->rctx, domain, true,
SSS_DP_GROUP, string, id, flag);
}
static int pam_check_user_search(struct pam_auth_req *preq)
{
struct sss_domain_info *dom = preq->domain;
char *name = NULL;
time_t cacheExpire;
int ret;
struct tevent_req *dpreq;
struct dp_callback_ctx *cb_ctx;
struct pam_ctx *pctx =
talloc_get_type(preq->cctx->rctx->pvt_ctx, struct pam_ctx);
while (dom) {
/* if it is a domainless search, skip domains that require fully
* qualified names instead */
while (dom && !preq->pd->domain && dom->fqnames) {
dom = get_next_domain(dom, false);
}
if (!dom) break;
if (dom != preq->domain) {
/* make sure we reset the check_provider flag when we check
* a new domain */
preq->check_provider = NEED_CHECK_PROVIDER(dom->provider);
}
/* make sure to update the preq if we changed domain */
preq->domain = dom;
talloc_free(name);
name = sss_get_cased_name(preq, preq->pd->user,
dom->case_sensitive);
if (!name) {
return ENOMEM;
}
name = sss_reverse_replace_space(preq, name,
pctx->rctx->override_space);
if (name == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE,
"sss_reverse_replace_space failed\n");
return ENOMEM;
}
/* Refresh the user's cache entry on any PAM query
* We put a timeout in the client context so that we limit
* the number of updates within a reasonable timeout
*/
if (preq->check_provider) {
ret = pam_initgr_check_timeout(pctx->id_table, name);
if (ret != EOK
&& ret != ENOENT) {
DEBUG(SSSDBG_OP_FAILURE,
"Could not look up initgroup timout\n");
return EIO;
} else if (ret == ENOENT) {
/* Call provider first */
break;
}
/* Entry is still valid, get it from the sysdb */
}
DEBUG(SSSDBG_CONF_SETTINGS,
"Requesting info for [%s@%s]\n", name, dom->name);
if (dom->sysdb == NULL) {
DEBUG(SSSDBG_FATAL_FAILURE,
"Fatal: Sysdb CTX not found for this domain!\n");
preq->pd->pam_status = PAM_SYSTEM_ERR;
return EFAULT;
}
ret = sysdb_getpwnam(preq, dom, name, &preq->res);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE,
"Failed to make request to our cache!\n");
return EIO;
}
if (preq->res->count > 1) {
DEBUG(SSSDBG_FATAL_FAILURE,
"getpwnam call returned more than one result !?!\n");
return ENOENT;
}
if (preq->res->count == 0) {
if (preq->check_provider == false) {
/* set negative cache only if not result of cache check */
ret = sss_ncache_set_user(pctx->ncache, false, dom, name);
if (ret != EOK) {
/* Should not be fatal, just slower next time */
DEBUG(SSSDBG_MINOR_FAILURE,
"Cannot set ncache for [%s@%s]\n", name,
dom->name);
}
}
/* if a multidomain search, try with next */
if (!preq->pd->domain) {
dom = get_next_domain(dom, false);
continue;
}
DEBUG(SSSDBG_OP_FAILURE, "No results for getpwnam call\n");
/* TODO: store negative cache ? */
return ENOENT;
}
/* One result found */
/* if we need to check the remote account go on */
if (preq->check_provider) {
cacheExpire = ldb_msg_find_attr_as_uint64(preq->res->msgs[0],
SYSDB_CACHE_EXPIRE, 0);
if (cacheExpire < time(NULL)) {
break;
}
}
DEBUG(SSSDBG_TRACE_FUNC,
"Returning info for user [%s@%s]\n", name, dom->name);
/* We might have searched by alias. Pass on the primary name */
ret = pd_set_primary_name(preq->res->msgs[0], preq->pd);
if (ret != EOK) {
DEBUG(SSSDBG_CRIT_FAILURE, "Could not canonicalize username\n");
return ret;
}
return EOK;
}
if (!dom) {
/* Ensure that we don't try to check a provider without a domain,
* since this will cause a NULL-dereference below.
*/
preq->check_provider = false;
}
if (preq->check_provider) {
/* dont loop forever :-) */
preq->check_provider = false;
dpreq = sss_dp_get_account_send(preq, preq->cctx->rctx,
dom, false, SSS_DP_INITGROUPS,
name, 0, NULL);
if (!dpreq) {
DEBUG(SSSDBG_CRIT_FAILURE,
"Out of memory sending data provider request\n");
return ENOMEM;
}
cb_ctx = talloc_zero(preq, struct dp_callback_ctx);
if(!cb_ctx) {
talloc_zfree(dpreq);
return ENOMEM;
}
cb_ctx->callback = pam_check_user_dp_callback;
cb_ctx->ptr = preq;
cb_ctx->cctx = preq->cctx;
cb_ctx->mem_ctx = preq;
tevent_req_set_callback(dpreq, pam_dp_send_acct_req_done, cb_ctx);
/* tell caller we are in an async call */
return EAGAIN;
}
static errno_t sudosrv_get_user(struct sudo_dom_ctx *dctx)
{
TALLOC_CTX *tmp_ctx = NULL;
struct sss_domain_info *dom = dctx->domain;
struct sudo_cmd_ctx *cmd_ctx = dctx->cmd_ctx;
struct cli_ctx *cli_ctx = dctx->cmd_ctx->cli_ctx;
struct ldb_result *user;
time_t cache_expire = 0;
struct tevent_req *dpreq;
struct dp_callback_ctx *cb_ctx;
const char *original_name = NULL;
char *name = NULL;
uid_t uid = 0;
errno_t ret;
tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, ("talloc_new() failed\n"));
return ENOMEM;
}
while (dom) {
/* if it is a domainless search, skip domains that require fully
* qualified names instead */
while (dom && cmd_ctx->check_next && dom->fqnames) {
dom = get_next_domain(dom, false);
}
if (!dom) break;
/* make sure to update the dctx if we changed domain */
dctx->domain = dom;
talloc_free(name);
name = sss_get_cased_name(tmp_ctx, cmd_ctx->username,
dom->case_sensitive);
if (name == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, ("Out of memory\n"));
ret = ENOMEM;
goto done;
}
DEBUG(SSSDBG_FUNC_DATA, ("Requesting info about [%s@%s]\n",
name, dom->name));
ret = sysdb_getpwnam(dctx, dctx->domain->sysdb,
dctx->domain, name, &user);
if (ret != EOK) {
DEBUG(SSSDBG_OP_FAILURE,
("Failed to make request to our cache!\n"));
ret = EIO;
goto done;
}
if (user->count > 1) {
DEBUG(SSSDBG_CRIT_FAILURE,
("getpwnam call returned more than one result !?!\n"));
ret = EIO;
goto done;
}
if (user->count == 0 && !dctx->check_provider) {
/* if a multidomain search, try with next */
if (cmd_ctx->check_next) {
dctx->check_provider = true;
dom = get_next_domain(dom, false);
if (dom) continue;
}
DEBUG(SSSDBG_MINOR_FAILURE, ("No results for getpwnam call\n"));
ret = ENOENT;
goto done;
}
/* One result found, check cache expiry */
if (user->count == 1) {
cache_expire = ldb_msg_find_attr_as_uint64(user->msgs[0],
SYSDB_CACHE_EXPIRE, 0);
}
/* If cache miss and we haven't checked DP yet OR the entry is
* outdated, go to DP */
if ((user->count == 0 || cache_expire < time(NULL))
&& dctx->check_provider) {
dpreq = sss_dp_get_account_send(cli_ctx, cli_ctx->rctx,
dom, false, SSS_DP_INITGROUPS,
cmd_ctx->username, 0, NULL);
if (!dpreq) {
DEBUG(SSSDBG_CRIT_FAILURE,
("Out of memory sending data provider request\n"));
ret = ENOMEM;
goto done;
}
cb_ctx = talloc_zero(cli_ctx, struct dp_callback_ctx);
if(!cb_ctx) {
talloc_zfree(dpreq);
ret = ENOMEM;
goto done;
}
cb_ctx->callback = sudosrv_check_user_dp_callback;
cb_ctx->ptr = dctx;
cb_ctx->cctx = cli_ctx;
cb_ctx->mem_ctx = cli_ctx;
tevent_req_set_callback(dpreq, sudosrv_dp_send_acct_req_done, cb_ctx);
/* tell caller we are in an async call */
ret = EAGAIN;
goto done;
}
/* check uid */
uid = ldb_msg_find_attr_as_int(user->msgs[0], SYSDB_UIDNUM, 0);
if (uid != cmd_ctx->uid) {
/* if a multidomain search, try with next */
if (cmd_ctx->check_next) {
dctx->check_provider = true;
dom = get_next_domain(dom, false);
if (dom) continue;
}
DEBUG(SSSDBG_MINOR_FAILURE, ("UID does not match\n"));
ret = ENOENT;
goto done;
}
/* user is stored in cache, remember cased and original name */
original_name = ldb_msg_find_attr_as_string(user->msgs[0],
SYSDB_NAME, NULL);
if (original_name == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, ("A user with no name?\n"));
ret = EFAULT;
goto done;
}
cmd_ctx->cased_username = talloc_move(cmd_ctx, &name);
cmd_ctx->orig_username = talloc_strdup(cmd_ctx, original_name);
if (cmd_ctx->orig_username == NULL) {
DEBUG(SSSDBG_CRIT_FAILURE, ("Out of memory\n"));
ret = ENOMEM;
goto done;
}
/* and set domain */
cmd_ctx->domain = dom;
DEBUG(SSSDBG_TRACE_FUNC, ("Returning info for user [%s@%s]\n",
cmd_ctx->username, dctx->domain->name));
ret = EOK;
goto done;
}
