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
  22 int auth_pam_pre(const char *userid, const char *service,
  23         int (*callback)(struct authinfo *, void *),
  24                         void *arg)
  25 {
  26 struct authinfo auth;
  27 struct passwd *pw;
  28 #if     HAVE_GETSPENT
  29 struct spwd *spw;
  30 #endif
  31
  32         memset(&auth, 0, sizeof(auth));
  33
  34         if ((pw=getpwnam(userid)) == 0)
  35         {
  36                 if (errno == ENOMEM)    return (1);
  37                 DPRINTF("authpam: username '%s' not found in password file", userid);
  38                 errno=EPERM;
  39                 return (-1);
  40         }
  41
  42         auth.sysusername=userid;
  43         auth.sysgroupid=pw->pw_gid;
  44         auth.homedir=pw->pw_dir;
  45         auth.address=userid;
  46         auth.fullname=pw->pw_gecos;
  47         auth.passwd=pw->pw_passwd;
  48
  49 #if     HAVE_GETSPENT
  50         if ((spw=getspnam(userid)) != 0)
  51                 auth.passwd=spw->sp_pwdp;
  52 #endif
  53         courier_authdebug_authinfo("DEBUG: authpam: ", &auth, 0, pw->pw_passwd);
  54
  55         return ((*callback)(&auth, arg));
  56 }