s3-libads: Add function to search for an element in an array.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=9984

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
(cherry picked from commit e1ee4c8bc7018db7787dd9a0be6d3aa40a477ee2)

2 files changed, 33 insertions, 0 deletions

diff --git a/source3/libads/ads_proto.h b/source3/libads/ads_proto.h
index 6a2280734d..1e34247e2f 100644
--- a/source3/libads/ads_proto.h
+++ b/source3/libads/ads_proto.h
@@ -88,6 +88,8 @@ ADS_STATUS ads_add_strlist(TALLOC_CTX *ctx, ADS_MODLIST *mods,
 uint32 ads_get_kvno(ADS_STRUCT *ads, const char *account_name);
 uint32_t ads_get_machine_kvno(ADS_STRUCT *ads, const char *machine_name);
 
+bool ads_element_in_array(const char **el_array, size_t num_el, const char *el);
+
 ADS_STATUS ads_get_service_principal_names(TALLOC_CTX *mem_ctx,
 					   ADS_STRUCT *ads,
 					   const char *machine_name,
diff --git a/source3/libads/ldap.c b/source3/libads/ldap.c
index 51a08835d2..8d104c2f59 100644
--- a/source3/libads/ldap.c
+++ b/source3/libads/ldap.c
@@ -1927,6 +1927,37 @@ ADS_STATUS ads_clear_service_principal_names(ADS_STRUCT *ads, const char *machin
 }
 
 /**
+ * @brief Search for an element in a string array.
+ *
+ * @param[in]  el_array  The string array to search.
+ *
+ * @param[in]  num_el    The number of elements in the string array.
+ *
+ * @param[in]  el        The string to search.
+ *
+ * @return               True if found, false if not.
+ */
+bool ads_element_in_array(const char **el_array, size_t num_el, const char *el)
+{
+	size_t i;
+
+	if (el_array == NULL || num_el == 0 || el == NULL) {
+		return false;
+	}
+
+	for (i = 0; i < num_el && el_array[i] != NULL; i++) {
+		int cmp;
+
+		cmp = strcasecmp_m(el_array[i], el);
+		if (cmp == 0) {
+			return true;
+		}
+	}
+
+	return false;
+}
+
+/**
  * @brief This gets the service principal names of an existing computer account.
  *
  * @param[in]  mem_ctx      The memory context to use to allocate the spn array.