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samba-mirror/third_party/nss_wrapper/nss_utils.c
Pavel Filipenský e0b1aaea1a third_party: Update nss_wrapper to version 1.1.15
Signed-off-by: Pavel Filipenský <pfilipensky@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>

Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Tue Jun 13 13:09:41 UTC 2023 on atb-devel-224
2023-06-13 13:09:41 +00:00

132 lines
3.5 KiB
C

/*
* BSD 3-Clause License
*
* Copyright (c) 2007, Stefan Metzmacher <metze@samba.org>
* Copyright (c) 2009, Guenther Deschner <gd@samba.org>
* Copyright (c) 2014-2015, Michael Adam <obnox@samba.org>
* Copyright (c) 2015, Robin Hack <hack.robin@gmail.com>
* Copyright (c) 2013-2018, Andreas Schneider <asn@samba.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the author nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <errno.h>
#include <grp.h>
#include <string.h>
#include <stdint.h>
#include "nss_utils.h"
int nwrap_gr_copy_r(const struct group *src, struct group *dst,
char *buf, size_t buflen, struct group **dstp)
{
char *p = NULL;
uintptr_t align = 0;
unsigned int gr_mem_cnt = 0;
unsigned i;
size_t total_len;
size_t gr_name_len = strlen(src->gr_name) + 1;
size_t gr_passwd_len = strlen(src->gr_passwd) + 1;
union {
char *ptr;
char **data;
} g_mem;
for (i = 0; src->gr_mem[i] != NULL; i++) {
gr_mem_cnt++;
}
/* Align the memory for storing pointers */
align = __alignof__(char *) - ((p - (char *)0) % __alignof__(char *));
total_len = align +
(1 + gr_mem_cnt) * sizeof(char *) +
gr_name_len + gr_passwd_len;
if (total_len > buflen) {
errno = ERANGE;
return -1;
}
buflen -= total_len;
/* gr_mem */
p = buf + align;
g_mem.ptr = p;
dst->gr_mem = g_mem.data;
/* gr_name */
p += (1 + gr_mem_cnt) * sizeof(char *);
dst->gr_name = p;
/* gr_passwd */
p += gr_name_len;
dst->gr_passwd = p;
/* gr_mem[x] */
p += gr_passwd_len;
/* gr_gid */
dst->gr_gid = src->gr_gid;
memcpy(dst->gr_name, src->gr_name, gr_name_len);
memcpy(dst->gr_passwd, src->gr_passwd, gr_passwd_len);
/* Set the terminating entry */
dst->gr_mem[gr_mem_cnt] = NULL;
/* Now add the group members content */
total_len = 0;
for (i = 0; i < gr_mem_cnt; i++) {
size_t len = strlen(src->gr_mem[i]) + 1;
dst->gr_mem[i] = p;
total_len += len;
p += len;
}
if (total_len > buflen) {
errno = ERANGE;
return -1;
}
for (i = 0; i < gr_mem_cnt; i++) {
size_t len = strlen(src->gr_mem[i]) + 1;
memcpy(dst->gr_mem[i],
src->gr_mem[i],
len);
}
if (dstp != NULL) {
*dstp = dst;
}
return 0;
}