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