Remove Gnulib explicit_bzero module

It’s no longer needed, as it is now merely a thin layer around
C23-style memset_explicit and we might as well just call the
C23 standard function; that’s more forward-looking.
* admin/merge-gnulib (GNULIB_MODULES):
Remove explicit_bzero, and add memset_explicit.
* lib/explicit_bzero.c, m4/explicit_bzero.m4:
Remove these files, which were copied from Gnulib.
* lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate.
* src/gnutls.c (gnutls_symmetric_aead):
Use memset_explicit instead of explicit_bzero.

2 files changed, 1 insertions, 39 deletions

diff --git a/lib/explicit_bzero.c b/lib/explicit_bzero.c
deleted file mode 100644
index fc309f81d61..00000000000
--- a/lib/explicit_bzero.c
+++ /dev/null
@@ -1,27 +0,0 @@
-/* Erasure of sensitive data, generic implementation.
-   Copyright (C) 2016-2022 Free Software Foundation, Inc.
-
-   This file is free software: you can redistribute it and/or modify
-   it under the terms of the GNU Lesser General Public License as
-   published by the Free Software Foundation; either version 2.1 of the
-   License, or (at your option) any later version.
-
-   This file 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 Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public License
-   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
-
-#include <config.h>
-
-#include <string.h>
-
-/* Set LEN bytes of S to 0.  The compiler will not delete a call to
-   this function, even if S is dead after the call.  */
-void
-explicit_bzero (void *s, size_t len)
-{
-  memset_explicit (s, 0, len);
-}
diff --git a/lib/gnulib.mk.in b/lib/gnulib.mk.in
index a3ab50f396f..fcbf5bde2db 100644
--- a/lib/gnulib.mk.in
+++ b/lib/gnulib.mk.in
@@ -93,7 +93,6 @@
 #  dup2 \
 #  environ \
 #  execinfo \
-#  explicit_bzero \
 #  faccessat \
 #  fchmodat \
 #  fcntl \
@@ -126,6 +125,7 @@
 #  memmem-simple \
 #  mempcpy \
 #  memrchr \
+#  memset_explicit \
 #  minmax \
 #  mkostemp \
 #  mktime \
@@ -264,7 +264,6 @@ GL_COND_OBJ_DIRFD_CONDITION = @GL_COND_OBJ_DIRFD_CONDITION@
 GL_COND_OBJ_DUP2_CONDITION = @GL_COND_OBJ_DUP2_CONDITION@
 GL_COND_OBJ_EUIDACCESS_CONDITION = @GL_COND_OBJ_EUIDACCESS_CONDITION@
 GL_COND_OBJ_EXECINFO_CONDITION = @GL_COND_OBJ_EXECINFO_CONDITION@
-GL_COND_OBJ_EXPLICIT_BZERO_CONDITION = @GL_COND_OBJ_EXPLICIT_BZERO_CONDITION@
 GL_COND_OBJ_FACCESSAT_CONDITION = @GL_COND_OBJ_FACCESSAT_CONDITION@
 GL_COND_OBJ_FCHMODAT_CONDITION = @GL_COND_OBJ_FCHMODAT_CONDITION@
 GL_COND_OBJ_FCNTL_CONDITION = @GL_COND_OBJ_FCNTL_CONDITION@
@@ -1860,16 +1859,6 @@ EXTRA_DIST += execinfo.in.h
 endif
 ## end   gnulib module execinfo
 
-## begin gnulib module explicit_bzero
-ifeq (,$(OMIT_GNULIB_MODULE_explicit_bzero))
-
-ifneq (,$(GL_COND_OBJ_EXPLICIT_BZERO_CONDITION))
-libgnu_a_SOURCES += explicit_bzero.c
-endif
-
-endif
-## end   gnulib module explicit_bzero
-
 ## begin gnulib module faccessat
 ifeq (,$(OMIT_GNULIB_MODULE_faccessat))