lib/gssapi/krb5/context_time.c

   1 /*
   2  * Copyright (c) 1997 - 2003 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include "gssapi_locl.h"
  35
  36 RCSID("$Id$");
  37
  38 OM_uint32
  39 gssapi_lifetime_left(OM_uint32 *minor_status,
  40                      OM_uint32 lifetime,
  41                      OM_uint32 *lifetime_rec)
  42 {
  43     krb5_timestamp timeret;
  44     krb5_error_code kret;
  45
  46     kret = krb5_timeofday(gssapi_krb5_context, &timeret);
  47     if (kret) {
  48         *minor_status = kret;
  49         gssapi_krb5_set_error_string ();
  50         return GSS_S_FAILURE;
  51     }
  52
  53     if (lifetime < timeret)
  54         *lifetime_rec = 0;
  55     else
  56         *lifetime_rec = lifetime - timeret;
  57
  58     return GSS_S_COMPLETE;
  59 }
  60
  61
  62 OM_uint32 gss_context_time
  63            (OM_uint32 * minor_status,
  64             const gss_ctx_id_t context_handle,
  65             OM_uint32 * time_rec
  66            )
  67 {
  68     OM_uint32 lifetime;
  69     OM_uint32 major_status;
  70
  71     GSSAPI_KRB5_INIT ();
  72
  73     HEIMDAL_MUTEX_lock(&context_handle->ctx_id_mutex);
  74     lifetime = context_handle->lifetime;
  75     HEIMDAL_MUTEX_unlock(&context_handle->ctx_id_mutex);
  76
  77     major_status = gssapi_lifetime_left(minor_status, lifetime, time_rec);
  78     if (major_status != GSS_S_COMPLETE)
  79         return major_status;
  80
  81     *minor_status = 0;
  82
  83     if (*time_rec == 0)
  84         return GSS_S_CONTEXT_EXPIRED;
  85
  86     return GSS_S_COMPLETE;
  87 }