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 "gsskrb5_locl.h"
  35
  36 OM_uint32
  37 _gsskrb5_lifetime_left(OM_uint32 *minor_status,
  38                        krb5_context context,
  39                        OM_uint32 lifetime,
  40                        OM_uint32 *lifetime_rec)
  41 {
  42     krb5_timestamp timeret;
  43     krb5_error_code kret;
  44
  45     if (lifetime == 0) {
  46         *lifetime_rec = GSS_C_INDEFINITE;
  47         return GSS_S_COMPLETE;
  48     }
  49
  50     kret = krb5_timeofday(context, &timeret);
  51     if (kret) {
  52         *minor_status = kret;
  53         return GSS_S_FAILURE;
  54     }
  55
  56     if (lifetime < timeret)
  57         *lifetime_rec = 0;
  58     else
  59         *lifetime_rec = lifetime - timeret;
  60
  61     return GSS_S_COMPLETE;
  62 }
  63
  64
  65 OM_uint32 _gsskrb5_context_time
  66            (OM_uint32 * minor_status,
  67             const gss_ctx_id_t context_handle,
  68             OM_uint32 * time_rec
  69            )
  70 {
  71     krb5_context context;
  72     OM_uint32 lifetime;
  73     OM_uint32 major_status;
  74     const gsskrb5_ctx ctx = (const gsskrb5_ctx) context_handle;
  75
  76     GSSAPI_KRB5_INIT (&context);
  77
  78     HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
  79     lifetime = ctx->lifetime;
  80     HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
  81
  82     major_status = _gsskrb5_lifetime_left(minor_status, context,
  83                                           lifetime, time_rec);
  84     if (major_status != GSS_S_COMPLETE)
  85         return major_status;
  86
  87     *minor_status = 0;
  88
  89     if (*time_rec == 0)
  90         return GSS_S_CONTEXT_EXPIRED;
  91
  92     return GSS_S_COMPLETE;
  93 }