SYSDB: Add sysdb_search_by_orig_dn()

Three new methods have been added to sysdb's API in order to perform
search by the orig dn (which is quite common in SSSD's code base).

A common/base method called sysdb_search_by_orig_dn() is the most
important one and then a few other helpers for searching users and
groups groups directly.

Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>

Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>
Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>

2 files changed, 86 insertions, 7 deletions

diff --git a/src/db/sysdb.h b/src/db/sysdb.h
index f4cad577b..411ee9aed 100644
--- a/src/db/sysdb.h
+++ b/src/db/sysdb.h
@@ -342,6 +342,12 @@ struct certmap_info {
     const char **domains;
 };
 
+enum sysdb_member_type {
+    SYSDB_MEMBER_USER,
+    SYSDB_MEMBER_GROUP,
+    SYSDB_MEMBER_NETGROUP,
+    SYSDB_MEMBER_SERVICE,
+};
 
 /* These attributes are stored in the timestamp cache */
 extern const char *sysdb_ts_cache_attrs[];
@@ -574,6 +580,20 @@ errno_t sysdb_apply_default_override(struct sss_domain_info *domain,
                                      struct sysdb_attrs *override_attrs,
                                      struct ldb_dn *obj_dn);
 
+errno_t sysdb_search_by_orig_dn(TALLOC_CTX *mem_ctx,
+                                struct sss_domain_info *domain,
+                                enum sysdb_member_type type,
+                                const char *member_dn,
+                                const char **attrs,
+                                size_t *msgs_counts,
+                                struct ldb_message ***msgs);
+
+#define sysdb_search_users_by_orig_dn(mem_ctx, domain, member_dn, attrs, msgs_counts, msgs) \
+    sysdb_search_by_orig_dn(mem_ctx, domain, SYSDB_MEMBER_USER, member_dn, attrs, msgs_counts, msgs);
+
+#define sysdb_search_groups_by_orig_dn(mem_ctx, domain, member_dn, attrs, msgs_counts, msgs) \
+    sysdb_search_by_orig_dn(mem_ctx, domain, SYSDB_MEMBER_GROUP, member_dn, attrs, msgs_counts, msgs);
+
 errno_t sysdb_search_user_override_attrs_by_name(TALLOC_CTX *mem_ctx,
                                             struct sss_domain_info *domain,
                                             const char *name,
@@ -1040,13 +1060,6 @@ int sysdb_store_group(struct sss_domain_info *domain,
                       uint64_t cache_timeout,
                       time_t now);
 
-enum sysdb_member_type {
-    SYSDB_MEMBER_USER,
-    SYSDB_MEMBER_GROUP,
-    SYSDB_MEMBER_NETGROUP,
-    SYSDB_MEMBER_SERVICE,
-};
-
 int sysdb_add_group_member(struct sss_domain_info *domain,
                            const char *group,
                            const char *member,
diff --git a/src/db/sysdb_ops.c b/src/db/sysdb_ops.c
index 7ca6575ce..4cfef6823 100644
--- a/src/db/sysdb_ops.c
+++ b/src/db/sysdb_ops.c
@@ -3236,6 +3236,72 @@ done:
     return ret;
 }
 
+static int sysdb_cache_search_users(TALLOC_CTX *mem_ctx,
+                                    struct sss_domain_info *domain,
+                                    struct ldb_context *ldb,
+                                    const char *sub_filter,
+                                    const char **attrs,
+                                    size_t *msgs_count,
+                                    struct ldb_message ***msgs);
+
+static int sysdb_cache_search_groups(TALLOC_CTX *mem_ctx,
+                                     struct sss_domain_info *domain,
+                                     struct ldb_context *ldb,
+                                     const char *sub_filter,
+                                     const char **attrs,
+                                     size_t *msgs_count,
+                                     struct ldb_message ***msgs);
+
+errno_t sysdb_search_by_orig_dn(TALLOC_CTX *mem_ctx,
+                                struct sss_domain_info *domain,
+                                enum sysdb_member_type type,
+                                const char *member_dn,
+                                const char **attrs,
+                                size_t *msgs_count,
+                                struct ldb_message ***msgs)
+{
+    TALLOC_CTX *tmp_ctx;
+    char *filter;
+    char *sanitized_dn = NULL;
+    errno_t ret;
+
+    tmp_ctx = talloc_new(NULL);
+    if (tmp_ctx == NULL) {
+        return ENOMEM;
+    }
+
+    ret = sss_filter_sanitize(tmp_ctx, member_dn, &sanitized_dn);
+    if (ret != EOK) {
+        goto done;
+    }
+
+    filter = talloc_asprintf(tmp_ctx, "(%s=%s)", SYSDB_ORIG_DN, sanitized_dn);
+    if (filter == NULL) {
+        ret = ENOMEM;
+        goto done;
+    }
+
+    switch (type) {
+    case SYSDB_MEMBER_USER:
+        ret = sysdb_cache_search_users(mem_ctx, domain, domain->sysdb->ldb,
+                                       filter, attrs, msgs_count, msgs);
+        break;
+    case SYSDB_MEMBER_GROUP:
+        ret = sysdb_cache_search_groups(mem_ctx, domain, domain->sysdb->ldb,
+                                        filter, attrs, msgs_count, msgs);
+        break;
+    default:
+        DEBUG(SSSDBG_CRIT_FAILURE,
+              "Trying to perform a search by orig_dn using a "
+              "non-supported type\n");
+        ret = EINVAL;
+        goto done;
+    }
+
+done:
+    talloc_free(tmp_ctx);
+    return ret;
+}
 
 /* =Custom Store (replaces-existing-data)================== */