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
  30 #include "auth.h"
  31 #include "buffer.h"
  32 #include "log.h"
  33
  34 #ifdef DAY
  35 # undef DAY
  36 #endif
  37 #define DAY     (24L * 60 * 60) /* 1 day in seconds */
  38
  39 extern Buffer loginmsg;
  40
  41 /*
  42  * For the account and password expiration functions, we assume the expiry
  43  * occurs the day after the day specified.
  44  */
  45
  46 /*
  47  * Check if specified account is expired.  Returns 1 if account is expired,
  48  * 0 otherwise.
  49  */
  50 int
  51 auth_shadow_acctexpired(struct spwd *spw)
  52 {
  53         time_t today;
  54         int daysleft;
  55         char buf[256];
  56
  57         today = time(NULL) / DAY;
  58         daysleft = spw->sp_expire - today;
  59         debug3("%s: today %d sp_expire %d days left %d", __func__, (int)today,
  60             (int)spw->sp_expire, daysleft);
  61
  62         if (spw->sp_expire == -1) {
  63                 debug3("account expiration disabled");
  64         } else if (daysleft < 0) {
  65                 logit("Account %.100s has expired", spw->sp_namp);
  66                 return 1;
  67         } else if (daysleft <= spw->sp_warn) {
  68                 debug3("account will expire in %d days", daysleft);
  69                 snprintf(buf, sizeof(buf),
  70                     "Your account will expire in %d day%s.\n", daysleft,
  71                     daysleft == 1 ? "" : "s");
  72                 buffer_append(&loginmsg, buf, strlen(buf));
  73         }
  74
  75         return 0;
  76 }
  77
  78 /*
  79  * Checks password expiry for platforms that use shadow passwd files.
  80  * Returns: 1 = password expired, 0 = password not expired
  81  */
  82 int
  83 auth_shadow_pwexpired(Authctxt *ctxt)
  84 {
  85         struct spwd *spw = NULL;
  86         const char *user = ctxt->pw->pw_name;
  87         char buf[256];
  88         time_t today;
  89         int daysleft, disabled = 0;
  90
  91         if ((spw = getspnam((char *)user)) == NULL) {
  92                 error("Could not get shadow information for %.100s", user);
  93                 return 0;
  94         }
  95
  96         today = time(NULL) / DAY;
  97         debug3("%s: today %d sp_lstchg %d sp_max %d", __func__, (int)today,
  98             (int)spw->sp_lstchg, (int)spw->sp_max);
  99
 100 #if defined(__hpux) && !defined(HAVE_SECUREWARE)
 101         if (iscomsec()) {
 102                 struct pr_passwd *pr;
 103
 104                 pr = getprpwnam((char *)user);
 105
 106                 /* Test for Trusted Mode expiry disabled */
 107                 if (pr != NULL && pr->ufld.fd_min == 0 &&
 108                     pr->ufld.fd_lifetime == 0 && pr->ufld.fd_expire == 0 &&
 109                     pr->ufld.fd_pw_expire_warning == 0 &&
 110                     pr->ufld.fd_schange != 0)
 111                         disabled = 1;
 112         }
 113 #endif
 114
 115         /* TODO: check sp_inact */
 116         daysleft = spw->sp_lstchg + spw->sp_max - today;
 117         if (disabled) {
 118                 debug3("password expiration disabled");
 119         } else if (spw->sp_lstchg == 0) {
 120                 logit("User %.100s password has expired (root forced)", user);
 121                 return 1;
 122         } else if (spw->sp_max == -1) {
 123                 debug3("password expiration disabled");
 124         } else if (daysleft < 0) {
 125                 logit("User %.100s password has expired (password aged)", user);
 126                 return 1;
 127         } else if (daysleft <= spw->sp_warn) {
 128                 debug3("password will expire in %d days", daysleft);
 129                 snprintf(buf, sizeof(buf),
 130                     "Your password will expire in %d day%s.\n", daysleft,
 131                     daysleft == 1 ? "" : "s");
 132                 buffer_append(&loginmsg, buf, strlen(buf));
 133         }
 134
 135         return 0;
 136 }
 137 #endif  /* USE_SHADOW && HAS_SHADOW_EXPIRE */