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e0b1aaea1a
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
132 lines
3.5 KiB
C
132 lines
3.5 KiB
C
/*
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* BSD 3-Clause License
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*
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* Copyright (c) 2007, Stefan Metzmacher <metze@samba.org>
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* Copyright (c) 2009, Guenther Deschner <gd@samba.org>
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* Copyright (c) 2014-2015, Michael Adam <obnox@samba.org>
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* Copyright (c) 2015, Robin Hack <hack.robin@gmail.com>
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* Copyright (c) 2013-2018, Andreas Schneider <asn@samba.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the author nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <errno.h>
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#include <grp.h>
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#include <string.h>
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#include <stdint.h>
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#include "nss_utils.h"
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int nwrap_gr_copy_r(const struct group *src, struct group *dst,
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char *buf, size_t buflen, struct group **dstp)
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{
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char *p = NULL;
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uintptr_t align = 0;
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unsigned int gr_mem_cnt = 0;
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unsigned i;
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size_t total_len;
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size_t gr_name_len = strlen(src->gr_name) + 1;
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size_t gr_passwd_len = strlen(src->gr_passwd) + 1;
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union {
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char *ptr;
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char **data;
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} g_mem;
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for (i = 0; src->gr_mem[i] != NULL; i++) {
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gr_mem_cnt++;
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}
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/* Align the memory for storing pointers */
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align = __alignof__(char *) - ((p - (char *)0) % __alignof__(char *));
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total_len = align +
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(1 + gr_mem_cnt) * sizeof(char *) +
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gr_name_len + gr_passwd_len;
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if (total_len > buflen) {
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errno = ERANGE;
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return -1;
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}
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buflen -= total_len;
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/* gr_mem */
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p = buf + align;
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g_mem.ptr = p;
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dst->gr_mem = g_mem.data;
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/* gr_name */
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p += (1 + gr_mem_cnt) * sizeof(char *);
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dst->gr_name = p;
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/* gr_passwd */
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p += gr_name_len;
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dst->gr_passwd = p;
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/* gr_mem[x] */
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p += gr_passwd_len;
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/* gr_gid */
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dst->gr_gid = src->gr_gid;
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memcpy(dst->gr_name, src->gr_name, gr_name_len);
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memcpy(dst->gr_passwd, src->gr_passwd, gr_passwd_len);
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/* Set the terminating entry */
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dst->gr_mem[gr_mem_cnt] = NULL;
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/* Now add the group members content */
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total_len = 0;
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for (i = 0; i < gr_mem_cnt; i++) {
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size_t len = strlen(src->gr_mem[i]) + 1;
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dst->gr_mem[i] = p;
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total_len += len;
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p += len;
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}
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if (total_len > buflen) {
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errno = ERANGE;
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return -1;
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}
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for (i = 0; i < gr_mem_cnt; i++) {
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size_t len = strlen(src->gr_mem[i]) + 1;
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memcpy(dst->gr_mem[i],
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src->gr_mem[i],
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len);
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}
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if (dstp != NULL) {
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*dstp = dst;
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}
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return 0;
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}
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