1 files changed, 67 insertions, 0 deletions
diff --git a/src/util/memory.c b/src/util/memory.c
new file mode 100644
index 000000000..a2c8b54b8
--- /dev/null
+++ b/src/util/memory.c
@@ -0,0 +1,67 @@
+/*
+    Authors:
+        Simo Sorce <ssorce@redhat.com>
+
+    Copyright (C) 2009 Red Hat
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "talloc.h"
+#include "util/util.h"
+
+/*
+ * sssd_mem_attach
+ * This function will take a non-talloc pointer and "attach" it to a talloc
+ * memory context. It will accept a destructor for the original pointer
+ * so that when the parent memory context is freed, the non-talloc
+ * pointer will also be freed properly.
+ */
+
+int password_destructor(void *memctx)
+{
+    char *password = (char *)memctx;
+    int i;
+
+    /* zero out password */
+    for (i = 0; password[i]; i++) password[i] = '\0';
+
+    return 0;
+}
+
+static int mem_holder_destructor(void *ptr)
+{
+    struct mem_holder *h;
+
+    h = talloc_get_type(ptr, struct mem_holder);
+    return h->fn(h->mem);
+}
+
+void *sss_mem_attach(TALLOC_CTX *mem_ctx,
+                     void *ptr,
+                     void_destructor_fn_t *fn)
+{
+    struct mem_holder *h;
+
+    if (!ptr || !fn) return NULL;
+
+    h = talloc(mem_ctx, struct mem_holder);
+    if (!h) return NULL;
+
+    h->mem = ptr;
+    h->fn = fn;
+    talloc_set_destructor((TALLOC_CTX *)h, mem_holder_destructor);
+
+    return h;
+}