[SSSD] [PATCH] simple access provider: allow fully qualified names

Jakub Hrozek jhrozek at redhat.com
Wed Aug 7 11:14:14 UTC 2013


On Tue, Aug 06, 2013 at 03:04:28PM +0200, Pavel Březina wrote:
> On 08/06/2013 01:50 PM, Jakub Hrozek wrote:
> >On Mon, Jul 29, 2013 at 10:56:12AM +0200, Pavel Březina wrote:
> >>On 07/26/2013 11:58 AM, Jakub Hrozek wrote:
> >>>On Fri, Jul 26, 2013 at 11:49:37AM +0200, Pavel Březina wrote:
> >>>>https://fedorahosted.org/sssd/ticket/2026
> >>>>
> >>>>I created a separate ticket to support subdomain users and groups in
> >>>>allow/deny lists.
> >>>>https://fedorahosted.org/sssd/ticket/2034
> >>>>
> >>>>There is a bug in PAC responder at the moment which makes simple access
> >>>>provider to always deny access to subdomain users. PAC responder currently
> >>>>fails to resolve group membership, thus we get error in access provider when
> >>>>looking up groups and access is denied. Jakub will look into this.
> >>>>
> >>>
> >>>Can you also amend the unit tests for the simple access provider?
> >>
> >>Sure.
> >>Patches are attached.
> >
> >Hi, only some nitpicks now:
> >
> >>@@ -103,66 +169,47 @@ int sssm_simple_access_init(struct be_ctx *bectx, struct bet_ops **ops,
> >>  {
> >>      int ret = EINVAL;
> >>      struct simple_ctx *ctx;
> >>+    int i;
> >>+    struct {
> >>+        const char *name;
> >>+        const char *option;
> >>+        char **orig_list;
> >>+        char ***ctx_list;
> >>+    } lists[4] = {{"Allow users", CONFDB_SIMPLE_ALLOW_USERS, NULL, NULL},
> >>+                  {"Deny users", CONFDB_SIMPLE_DENY_USERS, NULL, NULL},
> >>+                  {"Allow groups", CONFDB_SIMPLE_ALLOW_GROUPS, NULL, NULL},
> >>+                  {"Deny groups", CONFDB_SIMPLE_DENY_GROUPS, NULL, NULL}};
> >
> >I don't think you need to hardcode the size here, just lists[] would do.
> >
> >>
> >>      ctx = talloc_zero(bectx, struct simple_ctx);
> >>      if (ctx == NULL) {
> >>-        DEBUG(1, ("talloc_zero failed.\n"));
> >>+        DEBUG(SSSDBG_CRIT_FAILURE, ("talloc_zero failed.\n"));
> >>          return ENOMEM;
> >>      }
> >>
> >>      ctx->domain = bectx->domain;
> >>      ctx->be_ctx = bectx;
> >>
> >>-    /* Users */
> >>-    ret = confdb_get_string_as_list(bectx->cdb, ctx, bectx->conf_path,
> >>-                                    CONFDB_SIMPLE_ALLOW_USERS,
> >>-                                    &ctx->allow_users);
> >>-    if (ret != EOK) {
> >>-        if (ret == ENOENT) {
> >>-            DEBUG(9, ("Allow user list is empty.\n"));
> >>-            ctx->allow_users = NULL;
> >>-        } else {
> >>-            DEBUG(1, ("confdb_get_string_as_list failed.\n"));
> >>-            goto failed;
> >>-        }
> >>-    }
> >>-
> >>-    ret = confdb_get_string_as_list(bectx->cdb, ctx, bectx->conf_path,
> >>-                                    CONFDB_SIMPLE_DENY_USERS,
> >>-                                    &ctx->deny_users);
> >>-    if (ret != EOK) {
> >>-        if (ret == ENOENT) {
> >>-            DEBUG(9, ("Deny user list is empty.\n"));
> >>-            ctx->deny_users = NULL;
> >>-        } else {
> >>-            DEBUG(1, ("confdb_get_string_as_list failed.\n"));
> >>-            goto failed;
> >>-        }
> >>-    }
> >>+    lists[0].ctx_list = &ctx->allow_users;
> >>+    lists[1].ctx_list = &ctx->deny_users;
> >>+    lists[2].ctx_list = &ctx->allow_groups;
> >>+    lists[3].ctx_list = &ctx->deny_groups;
> >>
> >>-    /* Groups */
> >>-    ret = confdb_get_string_as_list(bectx->cdb, ctx, bectx->conf_path,
> >>-                                    CONFDB_SIMPLE_ALLOW_GROUPS,
> >>-                                    &ctx->allow_groups);
> >>-    if (ret != EOK) {
> >
> >And then when iterating over the array, you can use sizeof(lists) as
> >it's the same scope. Alternatively, you can use a last "sentinel"
> >element that could be initialized to { NULL, NULL, NULL, NULL } and
> >iterate until .name != NULL.
> >
> >>+    for (i = 0; i < 4; i++) {
> >>+        ret = confdb_get_string_as_list(bectx->cdb, ctx, bectx->conf_path,
> >>+                                        lists[i].option, &lists[i].orig_list);
> >>          if (ret == ENOENT) {
> >>-            DEBUG(9, ("Allow group list is empty.\n"));
> >>-            ctx->allow_groups = NULL;
> >>-        } else {
> >>-            DEBUG(1, ("confdb_get_string_as_list failed.\n"));
> >>+            DEBUG(SSSDBG_FUNC_DATA, ("%s list is empty.\n", lists[i].name));
> >>+            *lists[i].ctx_list = NULL;
> >
> >Do you actually need to special case ENOENT here?
> >simple_access_parse_names() handles empty input list just fine. If you
> >want to double check also here, then I think you should continue
> >instead.
> >
> >>+        } else if (ret != EOK) {
> >>+            DEBUG(SSSDBG_CRIT_FAILURE, ("confdb_get_string_as_list failed.\n"));
> >>              goto failed;
> >>          }
> >>-    }
> >>
> >>-    ret = confdb_get_string_as_list(bectx->cdb, ctx, bectx->conf_path,
> >>-                                    CONFDB_SIMPLE_DENY_GROUPS,
> >>-                                    &ctx->deny_groups);
> >>-    if (ret != EOK) {
> >>-        if (ret == ENOENT) {
> >>-            DEBUG(9, ("Deny user list is empty.\n"));
> >>-            ctx->deny_groups = NULL;
> >>-        } else {
> >>-            DEBUG(1, ("confdb_get_string_as_list failed.\n"));
> >>+        ret = simple_access_parse_names(ctx, bectx, lists[i].orig_list,
> >>+                                        lists[i].ctx_list);
> >>+        if (ret != EOK) {
> >>+            DEBUG(SSSDBG_CRIT_FAILURE, ("Unable to parse %s list [%d]: %s\n",
> >>+                                        lists[i].name, ret, sss_strerror(ret)));
> >>              goto failed;
> >>          }
> >>      }
> >>--
> >>1.7.11.7
> 
> Thanks for the review. New patch is attached.

Thank you, these patches look good to me and work fine (I only tested
against IPA, but I don't think that the backend matters much for these
patches)



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