diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/liboutils/freezero.c | 29 | ||||
| -rw-r--r-- | src/liboutils/outils.h | 2 | ||||
| -rw-r--r-- | src/usr.bin/signify/signify.c | 5 |
3 files changed, 33 insertions, 3 deletions
diff --git a/src/liboutils/freezero.c b/src/liboutils/freezero.c new file mode 100644 index 0000000..cda032f --- /dev/null +++ b/src/liboutils/freezero.c @@ -0,0 +1,29 @@ +/* + * Copyright (c) 2017 Nicholas Marriott <nicholas.marriott@gmail.com> + * + * 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 MIND, 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. + */ + +#include <sys/types.h> + +#include <stdlib.h> +#include <string.h> + +void +freezero(void *ptr, size_t size) +{ + if (ptr != NULL) { + memset(ptr, 0, size); + free(ptr); + } +} diff --git a/src/liboutils/outils.h b/src/liboutils/outils.h index 7686d60..1e628ed 100644 --- a/src/liboutils/outils.h +++ b/src/liboutils/outils.h @@ -38,3 +38,5 @@ void *reallocarray(void *, size_t, size_t); int pledge(const char *, const char **); void explicit_bzero(void *buf, size_t len); int getentropy(void *buf, size_t len); +void freezero(void *ptr, size_t size); + diff --git a/src/usr.bin/signify/signify.c b/src/usr.bin/signify/signify.c index 646532e..e7af943 100644 --- a/src/usr.bin/signify/signify.c +++ b/src/usr.bin/signify/signify.c @@ -1,4 +1,4 @@ -/* $OpenBSD: signify.c,v 1.125 2016/10/05 15:58:50 tedu Exp $ */ +/* $OpenBSD: signify.c,v 1.127 2017/04/18 02:20:50 deraadt Exp $ */ /* * Copyright (c) 2013 Ted Unangst <tedu@openbsd.org> * @@ -246,8 +246,7 @@ writekeyfile(const char *filename, const char *comment, const void *buf, fd = xopen(filename, O_CREAT|oflags|O_NOFOLLOW|O_WRONLY, mode); header = createheader(comment, buf, buflen); writeall(fd, header, strlen(header), filename); - explicit_bzero(header, strlen(header)); - free(header); + freezero(header, strlen(header)); close(fd); } |