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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:37:38 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 14:37:38 +0000
commitae581a19fbe896a797450b9d9573fb66f2735227 (patch)
tree56c40be8518a29c9351364d13a9676aa83932dc0 /lib/util/explicit_bzero.c
parentInitial commit. (diff)
downloadsudo-ae581a19fbe896a797450b9d9573fb66f2735227.tar.xz
sudo-ae581a19fbe896a797450b9d9573fb66f2735227.zip
Adding upstream version 1.9.13p3.upstream/1.9.13p3upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--lib/util/explicit_bzero.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/lib/util/explicit_bzero.c b/lib/util/explicit_bzero.c
new file mode 100644
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--- /dev/null
+++ b/lib/util/explicit_bzero.c
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+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2020 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#define __STDC_WANT_LIB_EXT1__ 1 /* for memset_s() */
+
+#include <string.h>
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+
+#include "sudo_compat.h"
+
+#ifndef HAVE_EXPLICIT_BZERO
+
+# if defined(HAVE_EXPLICIT_MEMSET)
+void
+sudo_explicit_bzero(void *s, size_t n)
+{
+ explicit_memset(s, 0, n);
+}
+# elif defined(HAVE_MEMSET_EXPLICIT)
+void
+sudo_explicit_bzero(void *s, size_t n)
+{
+ memset_explicit(s, 0, n);
+}
+# elif defined(HAVE_MEMSET_S)
+void
+sudo_explicit_bzero(void *s, size_t n)
+{
+ (void)memset_s(s, n, 0, n);
+}
+# elif defined(HAVE_BZERO)
+/* Jumping through a volatile function pointer should not be optimized away. */
+void (* volatile sudo_explicit_bzero_impl)(void *, size_t) =
+ (void (*)(void *, size_t))bzero;
+
+void
+sudo_explicit_bzero(void *s, size_t n)
+{
+ sudo_explicit_bzero_impl(s, n);
+}
+# else
+void
+sudo_explicit_bzero(void *v, size_t n)
+{
+ volatile unsigned char *s = v;
+
+ /* Updating through a volatile pointer should not be optimized away. */
+ while (n--)
+ *s++ = '\0';
+}
+# endif /* HAVE_BZERO */
+
+#endif /* HAVE_EXPLICIT_BZERO */