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From 3725d2a83ae64be47c1bb645933f3a2abc91bd08 Mon Sep 17 00:00:00 2001
From: Jakub Hrozek <jhrozek@redhat.com>
Date: Mon, 25 Jan 2016 16:11:59 +0100
Subject: [PATCH 79/86] IPA: Add interface to call into IPA provider from LDAP
provider
https://fedorahosted.org/sssd/ticket/2522
Adds a pluggable interface that is able to resolve the IPA group's
external members. At the moment, the request calls the full be_
interface to make sure all corner cases like id-views are handled
internally.
Reviewed-by: Sumit Bose <sbose@redhat.com>
(cherry picked from commit e2d96566aeb881bd89e5c9236d663f6a9a88019a)
(cherry picked from commit 00ee45423f0712b83926c6f8b354a1a18ff741c8)
---
src/providers/ipa/ipa_id.c | 5 +-
src/providers/ipa/ipa_init.c | 28 +++
src/providers/ipa/ipa_subdomains.h | 11 ++
src/providers/ipa/ipa_subdomains_ext_groups.c | 275 ++++++++++++++++++++++++++
src/providers/ipa/ipa_subdomains_id.c | 1 +
src/providers/ldap/sdap.h | 23 +++
6 files changed, 342 insertions(+), 1 deletion(-)
diff --git a/src/providers/ipa/ipa_id.c b/src/providers/ipa/ipa_id.c
index 27cc2548d8802c81311c6c5bd10a0db4e8930fa1..29e22982c415220c931f0422e10cd06dfa1a195b 100644
--- a/src/providers/ipa/ipa_id.c
+++ b/src/providers/ipa/ipa_id.c
@@ -405,7 +405,10 @@ static int ipa_initgr_get_overrides_step(struct tevent_req *req)
/* This should never happen, the search filter used to get the list
* of groups includes "uuid=*"
*/
- DEBUG(SSSDBG_OP_FAILURE, "A group with no UUID, error!\n");
+ DEBUG(SSSDBG_OP_FAILURE,
+ "The group %s has no UUID attribute %s, error!\n",
+ ldb_dn_get_linearized(state->groups[state->group_idx]->dn),
+ state->groups_id_attr);
return EINVAL;
}
diff --git a/src/providers/ipa/ipa_init.c b/src/providers/ipa/ipa_init.c
index 0e16dd97c78a087256fb77be500c9741484867c5..453e2b25673ac709c9fa3809d35b7885630c8b24 100644
--- a/src/providers/ipa/ipa_init.c
+++ b/src/providers/ipa/ipa_init.c
@@ -139,6 +139,24 @@ int common_ipa_init(struct be_ctx *bectx)
return EOK;
}
+static struct sdap_ext_member_ctx *
+ipa_create_ext_members_ctx(TALLOC_CTX *mem_ctx,
+ struct ipa_id_ctx *id_ctx)
+{
+ struct sdap_ext_member_ctx *ext_ctx = NULL;
+
+ ext_ctx = talloc_zero(mem_ctx, struct sdap_ext_member_ctx);
+ if (ext_ctx == NULL) {
+ return NULL;
+ }
+
+ ext_ctx->pvt = id_ctx;
+ ext_ctx->ext_member_resolve_send = ipa_ext_group_member_send;
+ ext_ctx->ext_member_resolve_recv = ipa_ext_group_member_recv;
+
+ return ext_ctx;
+}
+
int sssm_ipa_id_init(struct be_ctx *bectx,
struct bet_ops **ops,
void **pvt_data)
@@ -360,6 +378,16 @@ int sssm_ipa_id_init(struct be_ctx *bectx,
"will not work [%d]: %s\n", ret, strerror(ret));
}
+ ipa_ctx->sdap_id_ctx->opts->ext_ctx = ipa_create_ext_members_ctx(
+ ipa_ctx->sdap_id_ctx->opts,
+ ipa_ctx);
+ if (ipa_ctx->sdap_id_ctx->opts->ext_ctx == NULL) {
+ DEBUG(SSSDBG_CRIT_FAILURE,
+ "Unable to set SRV the extrernal group ctx\n");
+ ret = ENOMEM;
+ goto done;
+ }
+
*ops = &ipa_id_ops;
*pvt_data = ipa_ctx;
ret = EOK;
diff --git a/src/providers/ipa/ipa_subdomains.h b/src/providers/ipa/ipa_subdomains.h
index 0c13f8ed2eeda87237dfb097f532c7137095ddf1..23c3b7e3cd3ee1e0ac1dbcf98dc71a6c2337b835 100644
--- a/src/providers/ipa/ipa_subdomains.h
+++ b/src/providers/ipa/ipa_subdomains.h
@@ -137,4 +137,15 @@ struct tevent_req *ipa_get_ad_memberships_send(TALLOC_CTX *mem_ctx,
const char *domain);
errno_t ipa_get_ad_memberships_recv(struct tevent_req *req, int *dp_error_out);
+
+struct tevent_req *ipa_ext_group_member_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ const char *ext_member,
+ void *pvt);
+errno_t ipa_ext_group_member_recv(TALLOC_CTX *mem_ctx,
+ struct tevent_req *req,
+ enum sysdb_member_type *_member_type,
+ struct sss_domain_info **_dom,
+ struct sysdb_attrs **_member);
+
#endif /* _IPA_SUBDOMAINS_H_ */
diff --git a/src/providers/ipa/ipa_subdomains_ext_groups.c b/src/providers/ipa/ipa_subdomains_ext_groups.c
index d487a58b8adffabe09ff50e31cb750b800b1d252..5dc6d0d6417ec3fb5e7865e4cbaf3c07f4afbd07 100644
--- a/src/providers/ipa/ipa_subdomains_ext_groups.c
+++ b/src/providers/ipa/ipa_subdomains_ext_groups.c
@@ -923,3 +923,278 @@ static errno_t ipa_add_ad_memberships_recv(struct tevent_req *req,
return EOK;
}
+
+static errno_t
+search_user_or_group_by_sid_str(TALLOC_CTX *mem_ctx,
+ struct sss_domain_info *domain,
+ const char *sid_str,
+ enum sysdb_member_type *_member_type,
+ struct ldb_message **_msg)
+{
+ errno_t ret;
+ struct ldb_message *msg = NULL;
+ const char *attrs[] = { SYSDB_NAME,
+ SYSDB_SID_STR,
+ SYSDB_ORIG_DN,
+ SYSDB_OBJECTCLASS,
+ SYSDB_CACHE_EXPIRE,
+ NULL };
+ TALLOC_CTX *tmp_ctx = NULL;
+ char *sanitized_sid = NULL;
+
+ tmp_ctx = talloc_new(NULL);
+ if (tmp_ctx == NULL) {
+ DEBUG(SSSDBG_CRIT_FAILURE, "talloc_new() failed\n");
+ return ENOMEM;
+ }
+
+ /* In theory SID shouldn't contain any special LDAP characters, but let's
+ * be paranoid
+ */
+ ret = sss_filter_sanitize(tmp_ctx, sid_str, &sanitized_sid);
+ if (ret != EOK) {
+ goto done;
+ }
+
+ ret = sysdb_search_user_by_sid_str(tmp_ctx, domain,
+ sid_str, attrs, &msg);
+ if (ret == EOK) {
+ *_member_type = SYSDB_MEMBER_USER;
+ } else if (ret == ENOENT) {
+ ret = sysdb_search_group_by_sid_str(tmp_ctx, domain,
+ sid_str, attrs, &msg);
+ if (ret == EOK) {
+ *_member_type = SYSDB_MEMBER_GROUP;
+ }
+ }
+
+ switch (ret) {
+ case EOK:
+ DEBUG(SSSDBG_TRACE_FUNC, "Found %s in sysdb\n", sid_str);
+ *_msg = talloc_steal(mem_ctx, msg);
+ break;
+ case ENOENT:
+ DEBUG(SSSDBG_TRACE_FUNC,
+ "Could not find %s in sysdb", sid_str);
+ break;
+ default:
+ DEBUG(SSSDBG_OP_FAILURE,
+ "Error looking for %s in sysdb [%d]: %s\n",
+ sid_str, ret, sss_strerror(ret));
+ break;
+ }
+
+done:
+ talloc_free(tmp_ctx);
+ return ret;
+}
+
+static errno_t
+ipa_ext_group_member_check(TALLOC_CTX *mem_ctx,
+ struct ipa_id_ctx *ipa_ctx,
+ struct sss_domain_info *member_dom,
+ const char *ext_member,
+ enum sysdb_member_type *_member_type,
+ struct sysdb_attrs **_member)
+{
+ TALLOC_CTX *tmp_ctx = NULL;
+ errno_t ret;
+ uint64_t expire;
+ time_t now = time(NULL);
+ struct ldb_message *msg;
+ struct sysdb_attrs **members;
+
+ tmp_ctx = talloc_new(NULL);
+ if (tmp_ctx == NULL) {
+ DEBUG(SSSDBG_CRIT_FAILURE, "talloc_new() failed\n");
+ return ENOMEM;
+ }
+
+ ret = search_user_or_group_by_sid_str(tmp_ctx, member_dom, ext_member,
+ _member_type, &msg);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE,
+ "Error looking up sid %s: [%d]: %s\n",
+ ext_member, ret, sss_strerror(ret));
+ goto done;
+ }
+
+ ret = sysdb_msg2attrs(tmp_ctx, 1, &msg, &members);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE,
+ "Could not convert result to sysdb_attrs [%d]: %s\n",
+ ret, sss_strerror(ret));
+ goto done;
+ }
+
+ /* Return the member both expired and valid */
+ *_member = talloc_steal(mem_ctx, members[0]);
+
+ expire = ldb_msg_find_attr_as_uint64(msg, SYSDB_CACHE_EXPIRE, 0);
+ if (expire != 0 && expire <= now) {
+ DEBUG(SSSDBG_TRACE_FUNC, "%s is expired", ext_member);
+ ret = EAGAIN;
+ goto done;
+ }
+
+done:
+ talloc_free(tmp_ctx);
+ return ret;
+}
+
+/* For the IPA external member resolution, we expect a SID as the input.
+ * The _recv() function output is the member and a type (user/group)
+ * since nothing else can be a group member.
+ */
+struct ipa_ext_member_state {
+ const char *ext_member;
+ struct sss_domain_info *dom;
+
+ enum sysdb_member_type member_type;
+ struct sysdb_attrs *member;
+};
+
+static void ipa_ext_group_member_done(struct tevent_req *subreq);
+
+struct tevent_req *ipa_ext_group_member_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ const char *ext_member,
+ void *pvt)
+{
+ struct ipa_id_ctx *ipa_ctx;
+ struct ipa_ext_member_state *state;
+ struct tevent_req *req;
+ struct tevent_req *subreq;
+ struct be_acct_req *ar;
+ errno_t ret;
+
+ req = tevent_req_create(mem_ctx, &state, struct ipa_ext_member_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ state->ext_member = ext_member;
+
+ ipa_ctx = talloc_get_type(pvt, struct ipa_id_ctx);
+ if (ipa_ctx == NULL) {
+ DEBUG(SSSDBG_CRIT_FAILURE, "Wrong private context!\n");
+ ret = EINVAL;
+ goto immediate;
+ }
+
+ state->dom = find_domain_by_sid(ipa_ctx->sdap_id_ctx->be->domain,
+ ext_member);
+ if (state->dom == NULL) {
+ DEBUG(SSSDBG_MINOR_FAILURE,
+ "Cannot find domain of SID [%s]\n", ext_member);
+ ret = ENOENT;
+ goto immediate;
+ }
+
+ ret = ipa_ext_group_member_check(state, ipa_ctx, state->dom, ext_member,
+ &state->member_type, &state->member);
+ if (ret == EOK) {
+ DEBUG(SSSDBG_TRACE_INTERNAL,
+ "external member %s already cached\n", ext_member);
+ goto immediate;
+ }
+
+ ret = get_be_acct_req_for_sid(state, ext_member, state->dom->name, &ar);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_MINOR_FAILURE,
+ "Cannot create the account request for [%s]\n", ext_member);
+ goto immediate;
+ }
+
+ subreq = be_get_account_info_send(state, ev, NULL,
+ ipa_ctx->sdap_id_ctx->be, ar);
+ if (subreq == NULL) {
+ ret = ENOMEM;
+ goto immediate;
+ }
+ tevent_req_set_callback(subreq, ipa_ext_group_member_done, req);
+
+ return req;
+
+immediate:
+ if (ret != EOK) {
+ tevent_req_error(req, ret);
+ } else {
+ tevent_req_done(req);
+ }
+ tevent_req_post(req, ev);
+ return req;
+}
+
+static void ipa_ext_group_member_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(subreq,
+ struct tevent_req);
+ struct ipa_ext_member_state *state = tevent_req_data(req,
+ struct ipa_ext_member_state);
+ errno_t ret;
+ int err_maj;
+ int err_min;
+ const char *err_msg;
+ struct ldb_message *msg;
+ struct sysdb_attrs **members;
+
+ ret = be_get_account_info_recv(subreq, state,
+ &err_maj, &err_min, &err_msg);
+ talloc_free(subreq);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE,
+ "be request failed %d:%d: %s\n", err_maj, err_min, err_msg);
+ tevent_req_error(req, ret);
+ return;
+ }
+
+ ret = search_user_or_group_by_sid_str(state,
+ state->dom,
+ state->ext_member,
+ &state->member_type,
+ &msg);
+ if (ret != EOK) {
+ DEBUG(ret == ENOENT ? SSSDBG_TRACE_FUNC : SSSDBG_OP_FAILURE,
+ "Could not find %s in sysdb [%d]: %s\n",
+ state->ext_member, ret, sss_strerror(ret));
+ tevent_req_error(req, ret);
+ return;
+ }
+
+ ret = sysdb_msg2attrs(state, 1, &msg, &members);
+ if (ret != EOK) {
+ DEBUG(SSSDBG_OP_FAILURE,
+ "Could not convert result to sysdb_attrs [%d]: %s\n",
+ ret, sss_strerror(ret));
+ tevent_req_error(req, ret);
+ return;
+ }
+
+ state->member = members[0];
+ tevent_req_done(req);
+}
+
+errno_t ipa_ext_group_member_recv(TALLOC_CTX *mem_ctx,
+ struct tevent_req *req,
+ enum sysdb_member_type *_member_type,
+ struct sss_domain_info **_dom,
+ struct sysdb_attrs **_member)
+{
+ struct ipa_ext_member_state *state = tevent_req_data(req,
+ struct ipa_ext_member_state);
+ TEVENT_REQ_RETURN_ON_ERROR(req);
+
+ if (_member_type != NULL) {
+ *_member_type = state->member_type;
+ }
+
+ if (_dom) {
+ *_dom = state->dom;
+ }
+
+ if (_member != NULL) {
+ *_member = talloc_steal(mem_ctx, state->member);
+ }
+
+ return EOK;
+}
diff --git a/src/providers/ipa/ipa_subdomains_id.c b/src/providers/ipa/ipa_subdomains_id.c
index 472985d4ab4f785aa9c4af94bf8021829ca1c3c8..70a1b6a12799b5a645bbf69f8cc19c30dcff82c5 100644
--- a/src/providers/ipa/ipa_subdomains_id.c
+++ b/src/providers/ipa/ipa_subdomains_id.c
@@ -1230,6 +1230,7 @@ static errno_t ipa_get_ad_apply_override_step(struct tevent_req *req)
* attributes set, i.e. where overrides might not have been applied. */
ret = sysdb_asq_search(state, state->obj_dom, state->obj_msg->dn,
"(&("SYSDB_GC")("SYSDB_GIDNUM"=*)" \
+ "("SYSDB_POSIX"=TRUE)" \
"(!("ORIGINALAD_PREFIX SYSDB_GIDNUM"=*))" \
"(!("ORIGINALAD_PREFIX SYSDB_NAME"=*)))",
SYSDB_INITGR_ATTR,
diff --git a/src/providers/ldap/sdap.h b/src/providers/ldap/sdap.h
index 9dc2e16a0da76246a1f4492cf70e9124edba4a31..e0e05da0c8270a8f131870bc755da862e43783cb 100644
--- a/src/providers/ldap/sdap.h
+++ b/src/providers/ldap/sdap.h
@@ -423,6 +423,26 @@ struct sdap_domain {
void *pvt;
};
+typedef struct tevent_req *
+(*ext_member_send_fn_t)(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ const char *ext_member,
+ void *pvt);
+typedef errno_t
+(*ext_member_recv_fn_t)(TALLOC_CTX *mem_ctx,
+ struct tevent_req *req,
+ enum sysdb_member_type *member_type,
+ struct sss_domain_info **_dom,
+ struct sysdb_attrs **_member);
+
+struct sdap_ext_member_ctx {
+ /* Typically ID context of the external ID provider */
+ void *pvt;
+
+ ext_member_send_fn_t ext_member_resolve_send;
+ ext_member_recv_fn_t ext_member_resolve_recv;
+};
+
struct sdap_options {
struct dp_option *basic;
struct sdap_attr_map *gen_map;
@@ -435,6 +455,9 @@ struct sdap_options {
/* ID-mapping support */
struct sdap_idmap_ctx *idmap_ctx;
+ /* Resolving external members */
+ struct sdap_ext_member_ctx *ext_ctx;
+
/* FIXME - should this go to a special struct to avoid mixing with name-service-switch maps? */
struct sdap_attr_map *sudorule_map;
struct sdap_attr_map *autofs_mobject_map;
--
2.5.0
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