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      1 /*	$NetBSD: context_time.c,v 1.2 2017/01/28 21:31:46 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1997 - 2003 Kungliga Tekniska Hgskolan
      5  * (Royal Institute of Technology, Stockholm, Sweden).
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  *
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  *
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * 3. Neither the name of the Institute nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include "gsskrb5_locl.h"
     37 
     38 OM_uint32
     39 _gsskrb5_lifetime_left(OM_uint32 *minor_status,
     40 		       krb5_context context,
     41 		       OM_uint32 endtime,
     42 		       OM_uint32 *lifetime_rec)
     43 {
     44     krb5_timestamp now;
     45     krb5_error_code kret;
     46 
     47     if (endtime == 0) {
     48 	*lifetime_rec = GSS_C_INDEFINITE;
     49 	return GSS_S_COMPLETE;
     50     }
     51 
     52     kret = krb5_timeofday(context, &now);
     53     if (kret) {
     54         *lifetime_rec = 0;
     55 	*minor_status = kret;
     56 	return GSS_S_FAILURE;
     57     }
     58 
     59     if (endtime < now)
     60 	*lifetime_rec = 0;
     61     else
     62 	*lifetime_rec = endtime - now;
     63 
     64     return GSS_S_COMPLETE;
     65 }
     66 
     67 
     68 OM_uint32 GSSAPI_CALLCONV _gsskrb5_context_time
     69            (OM_uint32 * minor_status,
     70             gss_const_ctx_id_t context_handle,
     71             OM_uint32 * time_rec
     72            )
     73 {
     74     krb5_context context;
     75     OM_uint32 endtime;
     76     OM_uint32 major_status;
     77     const gsskrb5_ctx ctx = (const gsskrb5_ctx) context_handle;
     78 
     79     GSSAPI_KRB5_INIT (&context);
     80 
     81     HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
     82     endtime = ctx->endtime;
     83     HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
     84 
     85     major_status = _gsskrb5_lifetime_left(minor_status, context,
     86 					  endtime, time_rec);
     87     if (major_status != GSS_S_COMPLETE)
     88 	return major_status;
     89 
     90     *minor_status = 0;
     91 
     92     if (*time_rec == 0)
     93 	return GSS_S_CONTEXT_EXPIRED;
     94 
     95     return GSS_S_COMPLETE;
     96 }
     97