[SSSD] IPA: resolve ghost members if a non-default view is applied

Sumit Bose sbose at redhat.com
Wed Dec 17 10:27:46 UTC 2014


On Wed, Dec 17, 2014 at 09:32:55AM +0100, Lukas Slebodnik wrote:
> On (11/12/14 11:21), Sumit Bose wrote:
> >Hi,
> >
> >these two patches add a missing part to
> >https://fedorahosted.org/sssd/ticket/2481 (ID Views implementation does
> >not support IPA user&group overrides). Since it is not allowed to have
> >ghost members if a non-default view is applied because otherwise user
> >name overrides would not be covered ghosts members have to be resolved
> >for IPA groups in this case. The changes are only in the IPA provider so
> >they should not cause a regression in other providers. Since the generic
> >LDAP code use some IPA specific optimizations (derives user name from
> >the user's DN to avoid LDAP lookups) there wouldn't be a performance
> >benefit if this change would be in the generic LDAP code.
> >
> >bye,
> >Sumit
> 
> >From 47dd73e7ee559817d7913fc36266adfea6e50020 Mon Sep 17 00:00:00 2001
> >From: Sumit Bose <sbose at redhat.com>
> >Date: Wed, 10 Dec 2014 15:03:18 +0100
> >Subject: [PATCH 2/2] IPA: resolve ghost members if a non-default view is
> > applied
> >
> >Related to https://fedorahosted.org/sssd/ticket/2481
> >---
> > src/providers/ipa/ipa_id.c            | 217 ++++++++++++++++++++++++++++++++++
> > src/providers/ipa/ipa_subdomains_id.c |   1 +
> > 2 files changed, 218 insertions(+)
> >
> There is warnig reported by two static analysers.
> Error: FORWARD_NULL (CWE-476): [#def2]
> sssd-1.12.3/src/providers/ipa/ipa_id.c:558: var_compare_op: Comparing "state->obj_msg" to null implies that "state->obj_msg" might be null.
> sssd-1.12.3/src/providers/ipa/ipa_id.c:612: var_deref_op: Dereferencing null pointer "state->obj_msg".
> 
> LS

yes, the check was useless because state->obj_msg is always set if
get_object_from_cache() returns EOK.

New version attached.

bye,
Sumit

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> sssd-devel mailing list
> sssd-devel at lists.fedorahosted.org
> https://lists.fedorahosted.org/mailman/listinfo/sssd-devel

-------------- next part --------------
From ade073549464334b8804b8839dddb43233ad944a Mon Sep 17 00:00:00 2001
From: Sumit Bose <sbose at redhat.com>
Date: Wed, 10 Dec 2014 15:02:15 +0100
Subject: [PATCH 1/2] IPA: add get_be_acct_req_for_user_name()

Related to https://fedorahosted.org/sssd/ticket/2481
---
 src/providers/ipa/ipa_id.h    |  5 +++++
 src/providers/ipa/ipa_views.c | 13 +++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/src/providers/ipa/ipa_id.h b/src/providers/ipa/ipa_id.h
index 9d219f281847df0ba4ac24061e598eb6915f9c38..2bb5e0d38f42d4bbb04854dfb04804fecf6257e8 100644
--- a/src/providers/ipa/ipa_id.h
+++ b/src/providers/ipa/ipa_id.h
@@ -87,6 +87,11 @@ errno_t get_be_acct_req_for_uuid(TALLOC_CTX *mem_ctx, const char *uuid,
                                  const char *domain_name,
                                  struct be_acct_req **_ar);
 
+errno_t get_be_acct_req_for_user_name(TALLOC_CTX *mem_ctx,
+                                      const char *user_name,
+                                      const char *domain_name,
+                                      struct be_acct_req **_ar);
+
 struct tevent_req *ipa_get_ad_override_send(TALLOC_CTX *mem_ctx,
                                             struct tevent_context *ev,
                                             struct sdap_id_ctx *sdap_id_ctx,
diff --git a/src/providers/ipa/ipa_views.c b/src/providers/ipa/ipa_views.c
index c768186d7cf5e5a997e2ca27a167b62c8dc99b3f..ccaea69563728a5cecc202709da5dab51747c040 100644
--- a/src/providers/ipa/ipa_views.c
+++ b/src/providers/ipa/ipa_views.c
@@ -177,6 +177,10 @@ static errno_t get_be_acct_req_for_xyz(TALLOC_CTX *mem_ctx, const char *val,
         ar->entry_type = BE_REQ_BY_UUID;
         ar->filter_type = BE_FILTER_UUID;
         break;
+    case BE_REQ_USER:
+        ar->entry_type = BE_REQ_USER;
+        ar->filter_type = BE_FILTER_NAME;
+        break;
     default:
         DEBUG(SSSDBG_CRIT_FAILURE, "Unsupported request type [%d].\n", type);
         talloc_free(ar);
@@ -213,6 +217,15 @@ errno_t get_be_acct_req_for_uuid(TALLOC_CTX *mem_ctx, const char *uuid,
                                    _ar);
 }
 
+errno_t get_be_acct_req_for_user_name(TALLOC_CTX *mem_ctx,
+                                      const char *user_name,
+                                      const char *domain_name,
+                                      struct be_acct_req **_ar)
+{
+    return get_be_acct_req_for_xyz(mem_ctx, user_name, domain_name, BE_REQ_USER,
+                                   _ar);
+}
+
 struct ipa_get_ad_override_state {
     struct tevent_context *ev;
     struct sdap_id_ctx *sdap_id_ctx;
-- 
2.1.0

-------------- next part --------------
From 72ed1c8ee1fb96c0bcd0d0311e0a8272112585d0 Mon Sep 17 00:00:00 2001
From: Sumit Bose <sbose at redhat.com>
Date: Wed, 10 Dec 2014 15:03:18 +0100
Subject: [PATCH 2/2] IPA: resolve ghost members if a non-default view is
 applied

Related to https://fedorahosted.org/sssd/ticket/2481
---
 src/providers/ipa/ipa_id.c            | 216 ++++++++++++++++++++++++++++++++++
 src/providers/ipa/ipa_subdomains_id.c |   1 +
 2 files changed, 217 insertions(+)

diff --git a/src/providers/ipa/ipa_id.c b/src/providers/ipa/ipa_id.c
index 5665a1835e8b0ab18325bfc68a8d8b5650730943..f34e5e617c07c94b78ce70c8668311011c80d73f 100644
--- a/src/providers/ipa/ipa_id.c
+++ b/src/providers/ipa/ipa_id.c
@@ -144,6 +144,154 @@ static void ipa_account_info_done(struct tevent_req *req)
     sdap_handler_done(breq, dp_error, ret, error_text);
 }
 
+struct ipa_resolve_user_list_state {
+    struct tevent_context *ev;
+    struct sdap_id_ctx *sdap_id_ctx;
+    struct be_req *be_req;
+    struct ldb_message_element *users;
+    const char *domain_name;
+    size_t user_idx;
+
+    int dp_error;
+};
+
+static errno_t ipa_resolve_user_list_get_user_step(struct tevent_req *req);
+static void ipa_resolve_user_list_get_user_done(struct tevent_req *subreq);
+
+static struct tevent_req *
+ipa_resolve_user_list_send(TALLOC_CTX *memctx, struct tevent_context *ev,
+                           struct be_req *be_req,
+                           struct sdap_id_ctx *sdap_id_ctx,
+                           const char *domain_name,
+                           struct ldb_message_element *users)
+{
+    int ret;
+    struct tevent_req *req;
+    struct ipa_resolve_user_list_state *state;
+
+    req = tevent_req_create(memctx, &state,
+                            struct ipa_resolve_user_list_state);
+    if (req == NULL) {
+        DEBUG(SSSDBG_OP_FAILURE, "tevent_req_create failed.\n");
+        return NULL;
+    }
+
+    state->ev = ev;
+    state->sdap_id_ctx = sdap_id_ctx;
+    state->be_req = be_req;
+    state->domain_name = domain_name;
+    state->users = users;
+    state->user_idx = 0;
+    state->dp_error = DP_ERR_FATAL;
+
+    ret = ipa_resolve_user_list_get_user_step(req);
+    if (ret == EAGAIN) {
+        return req;
+    }
+    if (ret != EOK) {
+        DEBUG(SSSDBG_OP_FAILURE,
+              "ipa_resolve_user_list_get_user_step failed.\n");
+    }
+
+    if (ret == EOK) {
+        state->dp_error = DP_ERR_OK;
+        tevent_req_done(req);
+    } else {
+        tevent_req_error(req, ret);
+    }
+    tevent_req_post(req, ev);
+    return req;
+}
+
+static errno_t ipa_resolve_user_list_get_user_step(struct tevent_req *req)
+{
+    int ret;
+    struct tevent_req *subreq;
+    struct be_acct_req *ar;
+    struct ipa_resolve_user_list_state *state = tevent_req_data(req,
+                                            struct ipa_resolve_user_list_state);
+
+    if (state->user_idx >= state->users->num_values) {
+        return EOK;
+    }
+
+    ret = get_be_acct_req_for_user_name(state,
+                                     state->users->values[state->user_idx].data,
+                                     state->domain_name, &ar);
+    if (ret != EOK) {
+        DEBUG(SSSDBG_OP_FAILURE, "get_be_acct_req_for_user_name failed.\n");
+        return ret;
+    }
+
+    DEBUG(SSSDBG_TRACE_ALL, "Trying to resolve user [%s].\n", ar->filter_value);
+
+    subreq = sdap_handle_acct_req_send(state, state->be_req, ar,
+                                       state->sdap_id_ctx,
+                                       state->sdap_id_ctx->opts->sdom,
+                                       state->sdap_id_ctx->conn, true);
+    if (subreq == NULL) {
+        DEBUG(SSSDBG_OP_FAILURE, "sdap_handle_acct_req_send failed.\n");
+        return ENOMEM;
+    }
+
+    tevent_req_set_callback(subreq, ipa_resolve_user_list_get_user_done, req);
+
+    return EAGAIN;
+}
+
+static void ipa_resolve_user_list_get_user_done(struct tevent_req *subreq)
+{
+    struct tevent_req *req = tevent_req_callback_data(subreq,
+                                                struct tevent_req);
+    struct ipa_resolve_user_list_state *state = tevent_req_data(req,
+                                            struct ipa_resolve_user_list_state);
+    int ret;
+
+    ret = sdap_handle_acct_req_recv(subreq, &state->dp_error, NULL, NULL);
+    talloc_zfree(subreq);
+    if (ret != EOK) {
+        DEBUG(SSSDBG_OP_FAILURE, "sdap_handle_acct request failed: %d\n", ret);
+        goto done;
+    }
+
+    state->user_idx++;
+
+    ret = ipa_resolve_user_list_get_user_step(req);
+    if (ret == EAGAIN) {
+        return;
+    }
+    if (ret != EOK) {
+        DEBUG(SSSDBG_OP_FAILURE,
+              "ipa_resolve_user_list_get_user_step failed.\n");
+    }
+
+done:
+    if (ret == EOK) {
+        state->dp_error = DP_ERR_OK;
+        tevent_req_done(req);
+    } else {
+        if (state->dp_error == DP_ERR_OK) {
+            state->dp_error = DP_ERR_FATAL;
+        }
+        tevent_req_error(req, ret);
+    }
+    return;
+}
+
+static int ipa_resolve_user_list_recv(struct tevent_req *req, int *dp_error)
+{
+    struct ipa_resolve_user_list_state *state = tevent_req_data(req,
+                                            struct ipa_resolve_user_list_state);
+
+    if (dp_error) {
+        *dp_error = state->dp_error;
+    }
+
+    TEVENT_REQ_RETURN_ON_ERROR(req);
+
+    return EOK;
+}
+
 struct ipa_id_get_account_info_state {
     struct tevent_context *ev;
     struct ipa_id_ctx *ipa_ctx;
@@ -157,6 +305,7 @@ struct ipa_id_get_account_info_state {
 
     struct sysdb_attrs *override_attrs;
     struct ldb_message *obj_msg;
+    struct ldb_message_element *ghosts;
     int dp_error;
 };
 
@@ -166,6 +315,7 @@ static errno_t ipa_id_get_account_info_get_original_step(struct tevent_req *req,
                                                         struct be_acct_req *ar);
 static void ipa_id_get_account_info_orig_done(struct tevent_req *subreq);
 static void ipa_id_get_account_info_done(struct tevent_req *subreq);
+static void ipa_id_get_user_list_done(struct tevent_req *subreq);
 
 static struct tevent_req *
 ipa_id_get_account_info_send(TALLOC_CTX *memctx, struct tevent_context *ev,
@@ -405,6 +555,16 @@ static void ipa_id_get_account_info_orig_done(struct tevent_req *subreq)
         goto fail;
     }
 
+    if ((state->ar->entry_type & BE_REQ_TYPE_MASK) == BE_REQ_GROUP
+            && state->ipa_ctx->view_name != NULL
+            && strcmp(state->ipa_ctx->view_name,
+                      SYSDB_DEFAULT_VIEW_NAME) != 0) {
+        /* check for ghost members because shost members are not allowed if a
+         * view other than the default view is applied.*/
+
+        state->ghosts = ldb_msg_find_element(state->obj_msg, SYSDB_GHOST);
+    }
+
     if (state->override_attrs == NULL) {
         uuid = ldb_msg_find_attr_as_string(state->obj_msg, SYSDB_UUID, NULL);
         if (uuid == NULL) {
@@ -457,6 +617,21 @@ static void ipa_id_get_account_info_orig_done(struct tevent_req *subreq)
         }
     }
 
+    if (state->ghosts != NULL) {
+        /* Resolve ghost members */
+        subreq = ipa_resolve_user_list_send(state, state->ev, state->be_req,
+                                            state->ipa_ctx->sdap_id_ctx,
+                                            state->domain->name,
+                                            state->ghosts);
+        if (subreq == NULL) {
+            DEBUG(SSSDBG_OP_FAILURE, "ipa_resolve_user_list_send failed.\n");
+            ret = ENOMEM;
+            goto fail;
+        }
+        tevent_req_set_callback(subreq, ipa_id_get_user_list_done, req);
+        return;
+    }
+
     state->dp_error = DP_ERR_OK;
     tevent_req_done(req);
     return;
@@ -508,6 +683,47 @@ static void ipa_id_get_account_info_done(struct tevent_req *subreq)
         goto fail;
     }
 
+    if (state->ghosts != NULL) {
+        /* Resolve ghost members */
+        subreq = ipa_resolve_user_list_send(state, state->ev, state->be_req,
+                                            state->ipa_ctx->sdap_id_ctx,
+                                            state->domain->name,
+                                            state->ghosts);
+        if (subreq == NULL) {
+            DEBUG(SSSDBG_OP_FAILURE, "ipa_resolve_user_list_send failed.\n");
+            ret = ENOMEM;
+            goto fail;
+        }
+        tevent_req_set_callback(subreq, ipa_id_get_user_list_done, req);
+        return;
+    }
+
+    state->dp_error = DP_ERR_OK;
+    tevent_req_done(req);
+    return;
+
+fail:
+    state->dp_error = dp_error;
+    tevent_req_error(req, ret);
+    return;
+}
+
+static void ipa_id_get_user_list_done(struct tevent_req *subreq)
+{
+    struct tevent_req *req = tevent_req_callback_data(subreq,
+                                                struct tevent_req);
+    struct ipa_id_get_account_info_state *state = tevent_req_data(req,
+                                          struct ipa_id_get_account_info_state);
+    int dp_error = DP_ERR_FATAL;
+    int ret;
+
+    ret = ipa_resolve_user_list_recv(subreq, &dp_error);
+    talloc_zfree(subreq);
+    if (ret != EOK) {
+        DEBUG(SSSDBG_OP_FAILURE, "IPA resolve user list %d\n", ret);
+        goto fail;
+    }
+
     state->dp_error = DP_ERR_OK;
     tevent_req_done(req);
     return;
diff --git a/src/providers/ipa/ipa_subdomains_id.c b/src/providers/ipa/ipa_subdomains_id.c
index 5c53876dc9a7080c3b361d9cc72f0eedecff8600..79285548d9470b34d66b366367fb69ef57710f83 100644
--- a/src/providers/ipa/ipa_subdomains_id.c
+++ b/src/providers/ipa/ipa_subdomains_id.c
@@ -862,6 +862,7 @@ errno_t get_object_from_cache(TALLOC_CTX *mem_ctx,
                             SYSDB_SID_STR,
                             SYSDB_OBJECTCLASS,
                             SYSDB_UUID,
+                            SYSDB_GHOST,
                             NULL };
     char *name;
 
-- 
2.1.0



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