preauthpam.c

   1 /*
   2 ** Copyright 1998 - 1999 Double Precision, Inc.  See COPYING for
   3 ** distribution information.
   4 */
   5
   6 #if     HAVE_CONFIG_H
   7 #include        "courier_auth_config.h"
   8 #endif
   9 #include        <stdio.h>
  10 #include        <stdlib.h>
  11 #include        <string.h>
  12 #include        <errno.h>
  13 #include        <pwd.h>
  14 #include        "auth.h"
  15 #include        "courierauthdebug.h"
  16
  17 #if     HAVE_SHADOW_H
  18 #include        <shadow.h>
  19 #endif
  20
  21 static const char rcsid[]="$Id: preauthpam.c,v 1.12 2005/02/20 04:41:20 mrsam Exp $";
  22
  23 int auth_pam_pre(const char *userid, const char *service,
  24         int (*callback)(struct authinfo *, void *),
  25                         void *arg)
  26 {
  27 struct authinfo auth;
  28 struct passwd *pw;
  29 #if     HAVE_GETSPENT
  30 struct spwd *spw;
  31 #endif
  32
  33         memset(&auth, 0, sizeof(auth));
  34
  35         if ((pw=getpwnam(userid)) == 0)
  36         {
  37                 if (errno == ENOMEM)    return (1);
  38                 DPRINTF("authpam: username '%s' not found in password file", userid);
  39                 errno=EPERM;
  40                 return (-1);
  41         }
  42
  43         auth.sysusername=userid;
  44         auth.sysgroupid=pw->pw_gid;
  45         auth.homedir=pw->pw_dir;
  46         auth.address=userid;
  47         auth.fullname=pw->pw_gecos;
  48         auth.passwd=pw->pw_passwd;
  49
  50 #if     HAVE_GETSPENT
  51         if ((spw=getspnam(userid)) != 0)
  52                 auth.passwd=spw->sp_pwdp;
  53 #endif
  54         courier_authdebug_authinfo("DEBUG: authpam: ", &auth, 0, pw->pw_passwd);
  55
  56         return ((*callback)(&auth, arg));
  57 }