source: rtems/cpukit/telnetd/check_passwd.c

Last change on this file was 94e04b5, checked in by Sebastian Huber <sebastian.huber@…>, on Dec 13, 2017 at 7:34:16 AM

telnetd: Include <rtems/passwd.h>

Prepare for header file move to common include directory.

Update #3254.

  • Property mode set to 100644
File size: 3.2 KB
Line 
1/*
2 * Authorship
3 * ----------
4 * This software was created by
5 *     Till Straumann <strauman@slac.stanford.edu>, 2003-2007
6 *         Stanford Linear Accelerator Center, Stanford University.
7 *
8 * Acknowledgement of sponsorship
9 * ------------------------------
10 * This software was produced by
11 *     the Stanford Linear Accelerator Center, Stanford University,
12 *         under Contract DE-AC03-76SFO0515 with the Department of Energy.
13 *
14 * Government disclaimer of liability
15 * ----------------------------------
16 * Neither the United States nor the United States Department of Energy,
17 * nor any of their employees, makes any warranty, express or implied, or
18 * assumes any legal liability or responsibility for the accuracy,
19 * completeness, or usefulness of any data, apparatus, product, or process
20 * disclosed, or represents that its use would not infringe privately owned
21 * rights.
22 *
23 * Stanford disclaimer of liability
24 * --------------------------------
25 * Stanford University makes no representations or warranties, express or
26 * implied, nor assumes any liability for the use of this software.
27 *
28 * Stanford disclaimer of copyright
29 * --------------------------------
30 * Stanford University, owner of the copyright, hereby disclaims its
31 * copyright and all other rights in this software.  Hence, anyone may
32 * freely use it for any purpose without restriction.
33 *
34 * Maintenance of notices
35 * ----------------------
36 * In the interest of clarity regarding the origin and status of this
37 * SLAC software, this and all the preceding Stanford University notices
38 * are to remain affixed to any copy or derivative of this software made
39 * or distributed by the recipient and are to be affixed to any copy of
40 * software made or distributed by the recipient that contains a copy or
41 * derivative of this software.
42 *
43 * ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03
44 *
45 * Copyright (c) 2009 embedded brains GmbH and others.
46 *
47 * embedded brains GmbH
48 * Obere Lagerstr. 30
49 * D-82178 Puchheim
50 * Germany
51 * <rtems@embedded-brains.de>
52 *
53 * The license and distribution terms for this file may be
54 * found in the file LICENSE in this distribution or at
55 * http://www.rtems.org/license/LICENSE.
56 */
57
58#ifdef HAVE_CONFIG_H
59#include "config.h"
60#endif
61
62#include <termios.h>
63#include <errno.h>
64#include <stdio.h>
65#include <unistd.h>
66#include <stdlib.h>
67#include <string.h>
68#include <syslog.h>
69
70#include <rtems/telnetd.h>
71
72#include "des.h"
73#include <rtems/passwd.h>
74
75/**
76 * @brief Standard Telnet login check that uses DES to encrypt the passphrase.
77 *
78 * Takes a @a passphrase, encrypts it and compares it to the encrypted
79 * passphrase in the @c TELNETD_PASSWD environment variable.  No password is
80 * required if @c TELNETD_PASSWD is unset.  The argument @a user is ignored.
81 */
82bool rtems_telnetd_login_check(
83  const char *user,
84  const char *passphrase
85)
86{
87  char *pw = getenv( "TELNETD_PASSWD");
88  char cryptbuf [21];
89  char salt [3];
90
91  if (pw == NULL || strlen( pw) == 0) {
92    #ifdef TELNETD_DEFAULT_PASSWD
93      pw = TELNETD_DEFAULT_PASSWD;
94    #else
95      return true;
96    #endif
97  }
98
99  strncpy( salt, pw, 2);
100  salt [2] = '\0';
101
102  return strcmp(
103    __des_crypt_r( passphrase, salt, cryptbuf, sizeof( cryptbuf)),
104    pw
105  ) == 0;
106}
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