Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 42 insertions, 0 deletions

diff --git a/lib/util/talloc_keep_secret.h b/lib/util/talloc_keep_secret.h
new file mode 100644
index 0000000..44a26ae
--- /dev/null
+++ b/lib/util/talloc_keep_secret.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2019      Andreas Schneider <asn@samba.org>
+ *
+ * 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/>.
+ */
+
+#ifndef _TALLOC_KEEP_SECRET_H
+#define _TALLOC_KEEP_SECRET_H
+
+#ifdef DOXYGEN
+/**
+ * @brief Keep the memory secret when freeing.
+ *
+ * This can be used to define memory as secret. For example memory which holds
+ * passwords or other secrets like session keys. The memory will be zeroed
+ * before is being freed.
+ *
+ * If you duplicate memory, e.g. using talloc_strdup() or talloc_asprintf() you
+ * need to call talloc_keep_secret() on the newly allocated memory too!
+ *
+ * @param[in]  ptr      The talloc chunk to mark as secure.
+ *
+ * @warning Do not use this in combination with talloc_realloc().
+ */
+void talloc_keep_secret(const void *ptr);
+#else
+#define talloc_keep_secret(ptr) _talloc_keep_secret(ptr, #ptr);
+void _talloc_keep_secret(void *ptr, const char *name);
+#endif
+
+#endif /* _TALLOC_KEEP_SECRET_H */