diff options
| -rw-r--r-- | src/Makefile.am | 2 | ||||
| -rw-r--r-- | src/config/SSSDConfig.py | 3 | ||||
| -rwxr-xr-x | src/config/SSSDConfigTest.py | 2 | ||||
| -rw-r--r-- | src/config/etc/sssd.api.d/sssd-ldap.conf | 3 | ||||
| -rw-r--r-- | src/db/sysdb.c | 10 | ||||
| -rw-r--r-- | src/db/sysdb.h | 2 | ||||
| -rw-r--r-- | src/man/sssd-ldap.5.xml | 39 | ||||
| -rw-r--r-- | src/providers/ipa/ipa_common.c | 3 | ||||
| -rw-r--r-- | src/providers/ipa/ipa_common.h | 2 | ||||
| -rw-r--r-- | src/providers/ldap/ldap_common.c | 3 | ||||
| -rw-r--r-- | src/providers/ldap/ldap_common.h | 3 | ||||
| -rw-r--r-- | src/providers/ldap/ldap_init.c | 56 | ||||
| -rw-r--r-- | src/providers/ldap/sdap.h | 1 | ||||
| -rw-r--r-- | src/providers/ldap/sdap_access.c | 457 | ||||
| -rw-r--r-- | src/providers/ldap/sdap_access.h | 39 |
15 files changed, 621 insertions, 4 deletions
diff --git a/src/Makefile.am b/src/Makefile.am index ac174619..b8352325 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -349,6 +349,7 @@ dist_noinst_HEADERS = \ providers/krb5/krb5_utils.h \ providers/ldap/ldap_common.h \ providers/ldap/sdap.h \ + providers/ldap/sdap_access.h \ providers/ldap/sdap_async.h \ providers/ldap/sdap_async_private.h \ providers/ipa/ipa_common.h \ @@ -729,6 +730,7 @@ libsss_ldap_la_SOURCES = \ providers/ldap/ldap_id.c \ providers/ldap/ldap_id_enum.c \ providers/ldap/ldap_id_cleanup.c \ + providers/ldap/sdap_access.c \ providers/ldap/ldap_auth.c \ providers/ldap/ldap_init.c \ providers/ldap/ldap_common.c \ diff --git a/src/config/SSSDConfig.py b/src/config/SSSDConfig.py index 6b759d83..7b9d96c9 100644 --- a/src/config/SSSDConfig.py +++ b/src/config/SSSDConfig.py @@ -151,6 +151,9 @@ option_strings = { # [provider/ldap/auth] 'ldap_pwd_policy' : _('Policy to evaluate the password expiration'), + # [provider/ldap/access] + 'ldap_access_filter' : _('LDAP filter to determine access privileges'), + # [provider/simple/access] 'simple_allow_users' : _('Comma separated list of allowed users'), 'simple_deny_users' : _('Comma separated list of prohibited users'), diff --git a/src/config/SSSDConfigTest.py b/src/config/SSSDConfigTest.py index 61c2f949..04d438e0 100755 --- a/src/config/SSSDConfigTest.py +++ b/src/config/SSSDConfigTest.py @@ -687,7 +687,7 @@ class SSSDConfigTestSSSDDomain(unittest.TestCase): control_provider_dict = { 'ipa': ['id', 'auth', 'access', 'chpass'], 'local': ['id', 'auth', 'chpass'], - 'ldap': ['id', 'auth', 'chpass'], + 'ldap': ['id', 'auth', 'access', 'chpass'], 'krb5': ['auth', 'chpass'], 'proxy': ['id', 'auth'], 'simple': ['access'], diff --git a/src/config/etc/sssd.api.d/sssd-ldap.conf b/src/config/etc/sssd.api.d/sssd-ldap.conf index abcb5199..7f0c3606 100644 --- a/src/config/etc/sssd.api.d/sssd-ldap.conf +++ b/src/config/etc/sssd.api.d/sssd-ldap.conf @@ -67,5 +67,8 @@ ldap_force_upper_case_realm = bool, None, false [provider/ldap/auth] ldap_pwd_policy = str, None, false +[provider/ldap/access] +ldap_access_filter = str, None, false + [provider/ldap/chpass] diff --git a/src/db/sysdb.c b/src/db/sysdb.c index 2d4a38d7..bfad77d8 100644 --- a/src/db/sysdb.c +++ b/src/db/sysdb.c @@ -166,6 +166,16 @@ int sysdb_attrs_add_string(struct sysdb_attrs *attrs, return sysdb_attrs_add_val(attrs, name, &v); } +int sysdb_attrs_add_bool(struct sysdb_attrs *attrs, + const char *name, bool value) +{ + if(value) { + return sysdb_attrs_add_string(attrs, name, "TRUE"); + } + + return sysdb_attrs_add_string(attrs, name, "FALSE"); +} + int sysdb_attrs_steal_string(struct sysdb_attrs *attrs, const char *name, char *str) { diff --git a/src/db/sysdb.h b/src/db/sysdb.h index 23560ecd..a5413a25 100644 --- a/src/db/sysdb.h +++ b/src/db/sysdb.h @@ -161,6 +161,8 @@ int sysdb_attrs_add_val(struct sysdb_attrs *attrs, const char *name, const struct ldb_val *val); int sysdb_attrs_add_string(struct sysdb_attrs *attrs, const char *name, const char *str); +int sysdb_attrs_add_bool(struct sysdb_attrs *attrs, + const char *name, bool value); int sysdb_attrs_add_long(struct sysdb_attrs *attrs, const char *name, long value); int sysdb_attrs_add_uint32(struct sysdb_attrs *attrs, diff --git a/src/man/sssd-ldap.5.xml b/src/man/sssd-ldap.5.xml index 9b1f14b6..89437d97 100644 --- a/src/man/sssd-ldap.5.xml +++ b/src/man/sssd-ldap.5.xml @@ -657,6 +657,45 @@ </listitem> </varlistentry> + <varlistentry> + <term>ldap_access_filter (string)</term> + <listitem> + <para> + If using access_provider = ldap, this option is + mandatory. It specifies an LDAP search filter + criteria that must be met for the user to be + granted access on this host. If + access_provider = ldap and this option is + not set, it will result in all users being + denied access. Use access_provider = allow to + change this default behavior. + </para> + <para> + Example: + </para> + <programlisting> +access_provider = ldap +ldap_access_filter = memberOf=cn=allowedusers,ou=Groups,dc=example,dc=com + </programlisting> + <para> + This example means that access to this host is + restricted to members of the "allowedusers" group + in ldap. + </para> + <para> + Offline caching for this feature is limited to + determining whether the user's last online login + was granted access permission. If they were + granted access during their last login, they will + continue to be granted access while offline and + vice-versa. + </para> + <para> + Default: Empty + </para> + </listitem> + </varlistentry> + </variablelist> </para> </refsect1> diff --git a/src/providers/ipa/ipa_common.c b/src/providers/ipa/ipa_common.c index a65ed279..580b66f4 100644 --- a/src/providers/ipa/ipa_common.c +++ b/src/providers/ipa/ipa_common.c @@ -71,7 +71,8 @@ struct dp_option ipa_def_ldap_opts[] = { { "ldap_referrals", DP_OPT_BOOL, BOOL_TRUE, BOOL_TRUE }, { "account_cache_expiration", DP_OPT_NUMBER, { .number = 0 }, NULL_NUMBER }, { "ldap_dns_service_name", DP_OPT_STRING, { SSS_LDAP_SRV_NAME }, NULL_STRING }, - { "ldap_krb5_ticket_lifetime", DP_OPT_NUMBER, { .number = (24 * 60 * 60) }, NULL_NUMBER } + { "ldap_krb5_ticket_lifetime", DP_OPT_NUMBER, { .number = (24 * 60 * 60) }, NULL_NUMBER }, + { "ldap_access_filter", DP_OPT_STRING, NULL_STRING, NULL_STRING } }; struct sdap_attr_map ipa_attr_map[] = { diff --git a/src/providers/ipa/ipa_common.h b/src/providers/ipa/ipa_common.h index 9678e0ce..fe9ca541 100644 --- a/src/providers/ipa/ipa_common.h +++ b/src/providers/ipa/ipa_common.h @@ -35,7 +35,7 @@ struct ipa_service { /* the following defines are used to keep track of the options in the ldap * module, so that if they change and ipa is not updated correspondingly * this will trigger a runtime abort error */ -#define IPA_OPTS_BASIC_TEST 34 +#define IPA_OPTS_BASIC_TEST 35 /* the following define is used to keep track of the options in the krb5 * module, so that if they change and ipa is not updated correspondingly diff --git a/src/providers/ldap/ldap_common.c b/src/providers/ldap/ldap_common.c index 1d62b750..f9726714 100644 --- a/src/providers/ldap/ldap_common.c +++ b/src/providers/ldap/ldap_common.c @@ -65,7 +65,8 @@ struct dp_option default_basic_opts[] = { { "ldap_referrals", DP_OPT_BOOL, BOOL_TRUE, BOOL_TRUE }, { "account_cache_expiration", DP_OPT_NUMBER, { .number = 0 }, NULL_NUMBER }, { "ldap_dns_service_name", DP_OPT_STRING, { SSS_LDAP_SRV_NAME }, NULL_STRING }, - { "ldap_krb5_ticket_lifetime", DP_OPT_NUMBER, { .number = (24 * 60 * 60) }, NULL_NUMBER } + { "ldap_krb5_ticket_lifetime", DP_OPT_NUMBER, { .number = (24 * 60 * 60) }, NULL_NUMBER }, + { "ldap_access_filter", DP_OPT_STRING, NULL_STRING, NULL_STRING } }; struct sdap_attr_map generic_attr_map[] = { diff --git a/src/providers/ldap/ldap_common.h b/src/providers/ldap/ldap_common.h index 53ffd6fe..1ee7378c 100644 --- a/src/providers/ldap/ldap_common.h +++ b/src/providers/ldap/ldap_common.h @@ -73,6 +73,9 @@ void sdap_pam_auth_handler(struct be_req *breq); /* chpass */ void sdap_pam_chpass_handler(struct be_req *breq); +/* access */ +void sdap_pam_access_handler(struct be_req *breq); + void sdap_handler_done(struct be_req *req, int dp_err, diff --git a/src/providers/ldap/ldap_init.c b/src/providers/ldap/ldap_init.c index df2956ec..5c6f4b79 100644 --- a/src/providers/ldap/ldap_init.c +++ b/src/providers/ldap/ldap_init.c @@ -25,6 +25,7 @@ #include "providers/child_common.h" #include "providers/ldap/ldap_common.h" #include "providers/ldap/sdap_async_private.h" +#include "providers/ldap/sdap_access.h" static void sdap_shutdown(struct be_req *req); @@ -46,6 +47,12 @@ struct bet_ops sdap_chpass_ops = { .finalize = sdap_shutdown }; +/* Access Handler */ +struct bet_ops sdap_access_ops = { + .handler = sdap_pam_access_handler, + .finalize = sdap_shutdown +}; + int sssm_ldap_id_init(struct be_ctx *bectx, struct bet_ops **ops, void **pvt_data) @@ -55,6 +62,15 @@ int sssm_ldap_id_init(struct be_ctx *bectx, const char *dns_service_name; int ret; + /* If we're already set up, just return that */ + if(bectx->bet_info[BET_ID].mod_name && + strcmp("LDAP", bectx->bet_info[BET_ID].mod_name)) { + DEBUG(8, ("Re-using sdap_id_ctx for this provider\n")); + *ops = bectx->bet_info[BET_ID].bet_ops; + *pvt_data = bectx->bet_info[BET_ID].pvt_bet_data; + return EOK; + } + ctx = talloc_zero(bectx, struct sdap_id_ctx); if (!ctx) return ENOMEM; @@ -186,6 +202,46 @@ int sssm_ldap_chpass_init(struct be_ctx *bectx, return ret; } +int sssm_ldap_access_init(struct be_ctx *bectx, + struct bet_ops **ops, + void **pvt_data) +{ + int ret; + struct sdap_access_ctx *access_ctx; + + access_ctx = talloc_zero(bectx, struct sdap_access_ctx); + if(access_ctx == NULL) { + ret = ENOMEM; + goto done; + } + + ret = sssm_ldap_id_init(bectx, ops, (void **)&access_ctx->id_ctx); + if (ret != EOK) { + DEBUG(1, ("sssm_ldap_id_init failed.\n")); + goto done; + } + + access_ctx->filter = dp_opt_get_cstring(access_ctx->id_ctx->opts->basic, + SDAP_ACCESS_FILTER); + if (access_ctx->filter == NULL) { + /* It's okay if this is NULL. In that case we will simply act + * like the 'deny' provider. + */ + DEBUG(0, ("Warning: access_provider=ldap set, " + "but no ldap_access_filter configured. " + "All domain users will be denied access.\n")); + } + + *ops = &sdap_access_ops; + *pvt_data = access_ctx; + +done: + if (ret != EOK) { + talloc_free(access_ctx); + } + return ret; +} + static void sdap_shutdown(struct be_req *req) { /* TODO: Clean up any internal data */ diff --git a/src/providers/ldap/sdap.h b/src/providers/ldap/sdap.h index 917e6010..d698b55b 100644 --- a/src/providers/ldap/sdap.h +++ b/src/providers/ldap/sdap.h @@ -152,6 +152,7 @@ enum sdap_basic_opt { SDAP_ACCOUNT_CACHE_EXPIRATION, SDAP_DNS_SERVICE_NAME, SDAP_KRB5_TICKET_LIFETIME, + SDAP_ACCESS_FILTER, SDAP_OPTS_BASIC /* opts counter */ }; diff --git a/src/providers/ldap/sdap_access.c b/src/providers/ldap/sdap_access.c new file mode 100644 index 00000000..fd3deb78 --- /dev/null +++ b/src/providers/ldap/sdap_access.c @@ -0,0 +1,457 @@ +/* + SSSD + + sdap_access.c + + Authors: + Stephen Gallagher <sgallagh@redhat.com> + + Copyright (C) 2010 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 <sys/param.h> +#include <security/pam_modules.h> +#include <talloc.h> +#include <tevent.h> +#include <errno.h> + +#include "util/util.h" +#include "db/sysdb.h" +#include "providers/ldap/ldap_common.h" +#include "providers/ldap/sdap.h" +#include "providers/ldap/sdap_access.h" +#include "providers/ldap/sdap_async.h" +#include "providers/data_provider.h" +#include "providers/dp_backend.h" + +static void sdap_access_reply(struct be_req *be_req, int pam_status) +{ + struct pam_data *pd; + pd = talloc_get_type(be_req->req_data, struct pam_data); + pd->pam_status = pam_status; + + if (pam_status == PAM_SUCCESS || pam_status == PAM_PERM_DENIED) { + be_req->fn(be_req, DP_ERR_OK, pam_status, NULL); + } + + else { + be_req->fn(be_req, DP_ERR_FATAL, pam_status, NULL); + } +} + +static struct tevent_req *sdap_access_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct be_ctx *be_ctx, + struct sdap_access_ctx *access_ctx, + const char *username); +static void sdap_access_done(struct tevent_req *req); +void sdap_pam_access_handler(struct be_req *breq) +{ + struct pam_data *pd; + struct tevent_req *req; + struct sdap_access_ctx *access_ctx; + + pd = talloc_get_type(breq->req_data, struct pam_data); + + access_ctx = + talloc_get_type(breq->be_ctx->bet_info[BET_ACCESS].pvt_bet_data, + struct sdap_access_ctx); + + req = sdap_access_send(breq, + breq->be_ctx->ev, + breq->be_ctx, + access_ctx, + pd->user); + if (req == NULL) { + DEBUG(1, ("Unable to start sdap_access request\n")); + sdap_access_reply(breq, PAM_SYSTEM_ERR); + return; + } + + tevent_req_set_callback(req, sdap_access_done, breq); +} + +struct sdap_access_req_ctx { + const char *username; + const char *filter; + struct tevent_context *ev; + struct sdap_access_ctx *access_ctx; + struct sdap_id_ctx *sdap_ctx; + struct sysdb_handle *handle; + struct be_ctx *be_ctx; + const char **attrs; + int pam_status; + bool cached_access; + char *basedn; +}; + +static void sdap_access_connect_done(struct tevent_req *subreq); +static void sdap_access_get_access_done(struct tevent_req *req); +static struct tevent_req *sdap_access_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + struct be_ctx *be_ctx, + struct sdap_access_ctx *access_ctx, + const char *username) +{ + errno_t ret; + struct sdap_access_req_ctx *state; + struct tevent_req *req; + struct tevent_req *subreq; + struct ldb_result *res; + const char *basedn; + + req = tevent_req_create(mem_ctx, &state, struct sdap_access_req_ctx); + if (req == NULL) { + return NULL; + } + + if (access_ctx->filter == NULL || *access_ctx->filter == '\0') { + /* If no filter is set, default to restrictive */ + DEBUG(6, ("No filter set. Access is denied.\n")); + state->pam_status = PAM_PERM_DENIED; + tevent_req_done(req); + tevent_req_post(req, be_ctx->ev); + return req; + } + + state->filter = NULL; + state->be_ctx = be_ctx; + state->username = username; + state->pam_status = PAM_SYSTEM_ERR; + state->sdap_ctx = access_ctx->id_ctx; + state->ev = ev; + state->access_ctx = access_ctx; + + state->attrs = talloc_array(state, const char *, 3); + if (state->attrs == NULL) { + DEBUG(1, ("Could not allocate attributes\n")); + goto failed; + } + + state->attrs[0] = SYSDB_ORIG_DN; + state->attrs[1] = SYSDB_LDAP_ACCESS; + state->attrs[2] = NULL; + + DEBUG(6, ("Performing access check for user [%s]\n", username)); + + /* Get original user DN */ + ret = sysdb_get_user_attr(state, be_ctx->sysdb, + be_ctx->domain, username, + state->attrs, + &res); + if (ret != EOK) { + if (ret == ENOENT) { + /* If we can't find the user, return permission denied */ + state->pam_status = PAM_PERM_DENIED; + goto finished; + } + goto failed; + } + else { + if (res->count == 0) { + /* If we can't find the user, return permission denied */ + state->pam_status = PAM_PERM_DENIED; + goto finished; + } + + if (res->count != 1) { + DEBUG(1, ("Invalid response from sysdb_get_user_attr\n")); + goto failed; + } + } + + /* Exactly one result returned */ + state->cached_access = ldb_msg_find_attr_as_bool(res->msgs[0], + SYSDB_LDAP_ACCESS, + false); + /* Ok, we have one result, check if we are online or offline */ + if (be_is_offline(state->be_ctx)) { + /* Ok, we're offline. Return from the cache */ + if (state->cached_access) { + DEBUG(6, ("Access granted by cached credentials\n")); + ret = EOK; + state->pam_status = PAM_SUCCESS; + goto finished; + } + + /* Access denied */ + DEBUG(6, ("Access denied by cached credentials\n")); + ret = EOK; + state->pam_status = PAM_PERM_DENIED; + goto finished; + } + + /* Perform online operation */ + basedn = ldb_msg_find_attr_as_string(res->msgs[0], + SYSDB_ORIG_DN, + NULL); + if(basedn == NULL) { + DEBUG(1,("Could not find originalDN for user [%s]\n", + state->username)); + goto failed; + } + + state->basedn = talloc_strdup(state, basedn); + if (state->basedn == NULL) { + DEBUG(1, ("Could not allocate memory for originalDN\n")); + goto failed; + } + talloc_zfree(res); + + /* Construct the filter */ + state->filter = talloc_asprintf( + state, + "(&(%s=%s)(objectclass=%s)(%s))", + state->sdap_ctx->opts->user_map[SDAP_AT_USER_NAME].name, + state->username, + state->sdap_ctx->opts->user_map[SDAP_OC_USER].name, + state->access_ctx->filter); + if (state->filter == NULL) { + DEBUG(0, ("Could not construct access filter\n")); + goto failed; + } + + DEBUG(6, ("Checking filter against LDAP\n")); + + /* Check whether we have an active LDAP connection */ + if (state->sdap_ctx->gsh == NULL || ! state->sdap_ctx->gsh->connected) { + subreq = sdap_cli_connect_send(state, state->ev, + state->sdap_ctx->opts, + state->sdap_ctx->be, + state->sdap_ctx->service, + NULL); + if (!subreq) { + DEBUG(1, ("sdap_cli_connect_send failed.\n")); + goto failed; + } + + tevent_req_set_callback(subreq, sdap_access_connect_done, req); + return req; + } + + /* Make the LDAP request */ + subreq = sdap_get_generic_send(state, + state->ev, + state->sdap_ctx->opts, + state->sdap_ctx->gsh, + state->basedn, LDAP_SCOPE_BASE, + state->filter, NULL, + NULL, 0); + if (subreq == NULL) { + DEBUG(1, ("Could not start LDAP communication\n")); + goto failed; + } + + tevent_req_set_callback(subreq, sdap_access_get_access_done, req); + + return req; + +failed: + talloc_free(req); + return NULL; + +finished: + tevent_req_done(req); + tevent_req_post(req, ev); + return req; +} + +static void sdap_access_connect_done(struct tevent_req *subreq) +{ + errno_t ret; + struct tevent_req *req = tevent_req_callback_data(subreq, + struct tevent_req); + struct sdap_access_req_ctx *state = + tevent_req_data(req, struct sdap_access_req_ctx); + + ret = sdap_cli_connect_recv(subreq, state->sdap_ctx, + &state->sdap_ctx->gsh, NULL); + talloc_zfree(subreq); + if (ret != EOK) { + /* Could not connect to LDAP. Mark as offline and return + * from cache. + */ + be_mark_offline(state->be_ctx); + if (state->cached_access) { + DEBUG(6, ("Access granted by cached credentials\n")); + state->pam_status = PAM_SUCCESS; + tevent_req_done(req); + return; + } + + /* Access denied */ + DEBUG(6, ("Access denied by cached credentials\n")); + state->pam_status = PAM_PERM_DENIED; + tevent_req_done(req); + } + + /* Connection to LDAP succeeded + * Send filter request + */ + subreq = sdap_get_generic_send(state, + state->ev, + state->sdap_ctx->opts, + state->sdap_ctx->gsh, + state->basedn, + LDAP_SCOPE_BASE, + state->filter, NULL, + NULL, 0); + if (subreq == NULL) { + DEBUG(1, ("Could not start LDAP communication\n")); + state->pam_status = PAM_SYSTEM_ERR; + tevent_req_error(req, EIO); + return; + } + + tevent_req_set_callback(subreq, sdap_access_get_access_done, req); +} + +static void sdap_access_get_access_done(struct tevent_req *subreq) +{ + errno_t ret; + size_t num_results; + bool found = false; + struct sysdb_attrs *attrs; + struct sysdb_attrs **results; + struct tevent_req *req = + tevent_req_callback_data(subreq, struct tevent_req); + struct sdap_access_req_ctx *state = + tevent_req_data(req, struct sdap_access_req_ctx); + ret = sdap_get_generic_recv(subreq, state, + &num_results, &results); + talloc_zfree(subreq); + if (ret != EOK) { + DEBUG(1, ("sdap_get_generic_send() returned error [%d][%s]", + ret, strerror(ret))); + state->pam_status = PAM_SYSTEM_ERR; + goto done; + } + + /* Check the number of responses we got + * If it's exactly 1, we passed the check + * If it's < 1, we failed the check + * Anything else is an error + */ + if (num_results < 1) { + DEBUG(4, ("User [%s] was not found with the specified filter. " + "Denying access.\n", state->username)); + found = false; + } + else if (results == NULL) { + DEBUG(1, ("num_results > 0, but results is NULL\n")); + ret = EIO; + state->pam_status = PAM_SYSTEM_ERR; + goto done; + } + else if (num_results > 1) { + /* It should not be possible to get more than one reply + * here, since we're doing a base-scoped search + */ + DEBUG(1, ("Received multiple replies\n")); + ret = EIO; + state->pam_status = PAM_SYSTEM_ERR; + goto done; + } + else { /* Ok, we got a single reply */ + found = true; + } + + if (found) { + /* Save "allow" to the cache for future offline + * access checks. + */ + DEBUG(6, ("Access granted by online lookup\n")); + state->pam_status = PAM_SUCCESS; + } + else { + /* Save "disallow" to the cache for future offline + * access checks. + */ + DEBUG(6, ("Access denied by online lookup\n")); + state->pam_status = PAM_PERM_DENIED; + } + + attrs = sysdb_new_attrs(state); + if (attrs == NULL) { + ret = ENOMEM; + DEBUG(1, ("Could not set up attrs\n")); + goto done; + } + + ret = sysdb_attrs_add_bool(attrs, SYSDB_LDAP_ACCESS, + state->pam_status == PAM_SUCCESS ? + true : + false); + if (ret != EOK) { + /* Failing to save to the cache is non-fatal. + * Just return the result. + */ + ret = EOK; + DEBUG(1, ("Could not set up attrs\n")); + goto done; + } + + ret = sysdb_set_user_attr(attrs, + state->be_ctx->sysdb, + state->be_ctx->domain, + state->username, + attrs, SYSDB_MOD_REP); + if (ret != EOK) { + /* Failing to save to the cache is non-fatal. + * Just return the result. + */ + ret = EOK; + DEBUG(1, ("Failed to set user access attribute\n")); + goto done; + } + +done: + if (ret == EOK) { + tevent_req_done(req); + } + else { + tevent_req_error(req, ret); + } +} + +static errno_t sdap_access_recv(struct tevent_req *req, int *pam_status) +{ + struct sdap_access_req_ctx *state = + tevent_req_data(req, struct sdap_access_req_ctx); + + TEVENT_REQ_RETURN_ON_ERROR(req); + + *pam_status = state->pam_status; + + return EOK; +} + +static void sdap_access_done(struct tevent_req *req) +{ + errno_t ret; + int pam_status; + struct be_req *breq = + tevent_req_callback_data(req, struct be_req); + + ret = sdap_access_recv(req, &pam_status); + talloc_zfree(req); + if (ret != EOK) { + DEBUG(1, ("Error retrieving access check result.\n")); + pam_status = PAM_SYSTEM_ERR; + } + + sdap_access_reply(breq, pam_status); +} diff --git a/src/providers/ldap/sdap_access.h b/src/providers/ldap/sdap_access.h new file mode 100644 index 00000000..5dbe8646 --- /dev/null +++ b/src/providers/ldap/sdap_access.h @@ -0,0 +1,39 @@ +/* + SSSD + + sdap_access.h + + Authors: + Stephen Gallagher <sgallagh@redhat.com> + + Copyright (C) 2010 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/>. +*/ + +#ifndef SDAP_ACCESS_H_ +#define SDAP_ACCESS_H_ + +#include "providers/dp_backend.h" + +#define SYSDB_LDAP_ACCESS "ldap_access_allow" + +struct sdap_access_ctx { + struct sdap_id_ctx *id_ctx; + const char *filter; +}; + +void ldap_pam_access_handler(struct be_req *breq); + +#endif /* SDAP_ACCESS_H_ */ |