authsyscommon.c

   1 /*
   2 ** Copyright 1998 - 2004 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 #if     HAVE_UNISTD_H
  15 #include        <unistd.h>
  16 #endif
  17
  18 #include        "auth.h"
  19 #include        "courierauthstaticlist.h"
  20 #include        "courierauthdebug.h"
  21
  22
  23
  24 struct callback_info {
  25         const char *pass;
  26         int (*callback_func)(struct authinfo *, void *);
  27         void *callback_arg;
  28         };
  29
  30 static int check_pw(struct authinfo *a, void *v)
  31 {
  32         struct callback_info *ci=(struct callback_info *)v;
  33         int rc;
  34
  35         if (a->passwd == NULL)
  36         {
  37                 DPRINTF("no password available to compare");
  38                 errno=EPERM;
  39                 return (-1);
  40         }
  41
  42         if (authcheckpassword(ci->pass, a->passwd))
  43         {
  44                 errno=EPERM;
  45                 return (-1);
  46         }
  47         a->clearpasswd=ci->pass;
  48         rc=(*ci->callback_func)(a, ci->callback_arg);
  49         a->clearpasswd=NULL;
  50         return rc;
  51 }
  52
  53 int auth_sys_common( int (*auth_pre_func)(const char *,
  54                                           const char *,
  55                                           int (*)(struct authinfo *,
  56                                                   void *),
  57                                           void *),
  58                      const char *user,
  59                      const char *pass,
  60                      const char *service,
  61                      int (*callback_func)(struct authinfo *, void *),
  62                      void *callback_arg)
  63 {
  64         struct callback_info ci;
  65
  66         ci.pass=pass;
  67         ci.callback_func=callback_func;
  68         ci.callback_arg=callback_arg;
  69         return (*auth_pre_func)(user, service, check_pw, &ci);
  70 }
  71