1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
/* ISC license. */
#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <skalibs/uint32.h>
#include <skalibs/stralloc.h>
#include <skalibs/unix-timed.h>
#include <skalibs/posixishard.h>
#include <nsss/pwd-def.h>
#include "nsss-switch-internal.h"
/*
Expects:
4 bytes pw_uid
4 bytes pw_gid
4 bytes total length of strings (including \0's)
\0-terminated pw_name
\0-terminated pw_passwd
\0-terminated pw_gecos
\0-terminated pw_dir
\0-terminated pw_shell
*/
int nsss_switch_pwd_read (buffer *b, struct passwd *pw, stralloc *sa, tain const *deadline, tain *stamp)
{
struct passwd pwtmp ;
uint32_t total, len, x ;
char *p ;
char buf[12] ;
if (!buffer_timed_get(b, buf, 12, deadline, stamp)) return 0 ;
uint32_unpack_big(buf, &x) ; pwtmp.pw_uid = x ;
uint32_unpack_big(buf + 4, &x) ; pwtmp.pw_gid = x ;
uint32_unpack_big(buf + 8, &total) ;
if (!stralloc_readyplus(sa, total)) return 0 ;
if (!buffer_timed_get(b, sa->s + sa->len, total, deadline, stamp)) return 0 ;
if (sa->s[sa->len + total - 1]) return (errno = EPROTO, 0) ;
p = sa->s + sa->len ; len = total ;
pwtmp.pw_name = p ; x = strnlen(p, len) + 1 ; p += x ; len -= x ;
if (!len) return (errno = EPROTO, 0) ;
pwtmp.pw_passwd = p ; x = strnlen(p, len) + 1 ; p += x ; len -= x ;
if (!len) return (errno = EPROTO, 0) ;
pwtmp.pw_gecos = p ; x = strnlen(p, len) + 1 ; p += x ; len -= x ;
if (!len) return (errno = EPROTO, 0) ;
pwtmp.pw_dir = p ; x = strnlen(p, len) + 1 ; p += x ; len -= x ;
if (!len) return (errno = EPROTO, 0) ;
pwtmp.pw_shell = p ; x = strnlen(p, len) + 1 ; p += x ; len -= x ;
if (len) return (errno = EPROTO, 0) ;
sa->len += total ;
*pw = pwtmp ;
return 1 ;
}
|
