auth-shadow.c

   1 /*
   2  * Copyright (c) 2004 Darren Tucker.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  23  */
  24
  25 #include "includes.h"
  26
  27 #if defined(USE_SHADOW) && defined(HAS_SHADOW_EXPIRE)
  28 #include <shadow.h>
  29 #include <stdarg.h>
  30 #include <string.h>
  31 #include <time.h>
  32
  33 #include "hostfile.h"
  34 #include "auth.h"
  35 #include "sshbuf.h"
  36 #include "ssherr.h"
  37 #include "log.h"
  38
  39 #ifdef DAY
  40 # undef DAY
  41 #endif
  42 #define DAY     (24L * 60 * 60) /* 1 day in seconds */
  43
  44 extern struct sshbuf *loginmsg;
  45
  46 /*
  47  * For the account and password expiration functions, we assume the expiry
  48  * occurs the day after the day specified.
  49  */
  50
  51 /*
  52  * Check if specified account is expired.  Returns 1 if account is expired,
  53  * 0 otherwise.
  54  */
  55 int
  56 auth_shadow_acctexpired(struct spwd *spw)
  57 {
  58         time_t today;
  59         long long daysleft;
  60         int r;
  61
  62         today = time(NULL) / DAY;
  63         daysleft = spw->sp_expire - today;
  64         debug3("%s: today %lld sp_expire %lld days left %lld", __func__,
  65             (long long)today, (long long)spw->sp_expire, daysleft);
  66
  67         if (spw->sp_expire == -1) {
  68                 debug3("account expiration disabled");
  69         } else if (daysleft < 0) {
  70                 logit("Account %.100s has expired", spw->sp_namp);
  71                 return 1;
  72         } else if (daysleft <= spw->sp_warn) {
  73                 debug3("account will expire in %lld days", daysleft);
  74                 if ((r = sshbuf_putf(loginmsg,
  75                     "Your account will expire in %lld day%s.\n", daysleft,
  76                     daysleft == 1 ? "" : "s")) != 0)
  77                         fatal("%s: buffer error: %s", __func__, ssh_err(r));
  78         }
  79
  80         return 0;
  81 }
  82
  83 /*
  84  * Checks password expiry for platforms that use shadow passwd files.
  85  * Returns: 1 = password expired, 0 = password not expired
  86  */
  87 int
  88 auth_shadow_pwexpired(Authctxt *ctxt)
  89 {
  90         struct spwd *spw = NULL;
  91         const char *user = ctxt->pw->pw_name;
  92         time_t today;
  93         int r, daysleft, disabled = 0;
  94
  95         if ((spw = getspnam((char *)user)) == NULL) {
  96                 error("Could not get shadow information for %.100s", user);
  97                 return 0;
  98         }
  99
 100         today = time(NULL) / DAY;
 101         debug3_f("today %lld sp_lstchg %lld sp_max %lld", (long long)today,
 102             (long long)spw->sp_lstchg, (long long)spw->sp_max);
 103
 104 #if defined(__hpux) && !defined(HAVE_SECUREWARE)
 105         if (iscomsec()) {
 106                 struct pr_passwd *pr;
 107
 108                 pr = getprpwnam((char *)user);
 109
 110                 /* Test for Trusted Mode expiry disabled */
 111                 if (pr != NULL && pr->ufld.fd_min == 0 &&
 112                     pr->ufld.fd_lifetime == 0 && pr->ufld.fd_expire == 0 &&
 113                     pr->ufld.fd_pw_expire_warning == 0 &&
 114                     pr->ufld.fd_schange != 0)
 115                         disabled = 1;
 116         }
 117 #endif
 118
 119         /* TODO: check sp_inact */
 120         daysleft = spw->sp_lstchg + spw->sp_max - today;
 121         if (disabled) {
 122                 debug3("password expiration disabled");
 123         } else if (spw->sp_lstchg == 0) {
 124                 logit("User %.100s password has expired (root forced)", user);
 125                 return 1;
 126         } else if (spw->sp_max == -1) {
 127                 debug3("password expiration disabled");
 128         } else if (daysleft < 0) {
 129                 logit("User %.100s password has expired (password aged)", user);
 130                 return 1;
 131         } else if (daysleft <= spw->sp_warn) {
 132                 debug3("password will expire in %d days", daysleft);
 133                 if ((r = sshbuf_putf(loginmsg,
 134                     "Your password will expire in %d day%s.\n", daysleft,
 135                     daysleft == 1 ? "" : "s")) != 0)
 136                         fatal("%s: buffer error: %s", __func__, ssh_err(r));
 137         }
 138
 139         return 0;
 140 }
 141 #endif  /* USE_SHADOW && HAS_SHADOW_EXPIRE */