1/*
2 * Copyright (c) 1997 - 2003 Kungliga Tekniska H�gskolan
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 "krb5/gsskrb5_locl.h"
35
36RCSID("$Id: context_time.c 19031 2006-11-13 18:02:57Z lha $");
37
38OM_uint32
39_gsskrb5_lifetime_left(OM_uint32 *minor_status,
40		       krb5_context context,
41		       OM_uint32 lifetime,
42		       OM_uint32 *lifetime_rec)
43{
44    krb5_timestamp timeret;
45    krb5_error_code kret;
46
47    if (lifetime == 0) {
48	*lifetime_rec = GSS_C_INDEFINITE;
49	return GSS_S_COMPLETE;
50    }
51
52    kret = krb5_timeofday(context, &timeret);
53    if (kret) {
54	*minor_status = kret;
55	return GSS_S_FAILURE;
56    }
57
58    if (lifetime < timeret)
59	*lifetime_rec = 0;
60    else
61	*lifetime_rec = lifetime - timeret;
62
63    return GSS_S_COMPLETE;
64}
65
66
67OM_uint32 _gsskrb5_context_time
68           (OM_uint32 * minor_status,
69            const gss_ctx_id_t context_handle,
70            OM_uint32 * time_rec
71           )
72{
73    krb5_context context;
74    OM_uint32 lifetime;
75    OM_uint32 major_status;
76    const gsskrb5_ctx ctx = (const gsskrb5_ctx) context_handle;
77
78    GSSAPI_KRB5_INIT (&context);
79
80    HEIMDAL_MUTEX_lock(&ctx->ctx_id_mutex);
81    lifetime = ctx->lifetime;
82    HEIMDAL_MUTEX_unlock(&ctx->ctx_id_mutex);
83
84    major_status = _gsskrb5_lifetime_left(minor_status, context,
85					  lifetime, time_rec);
86    if (major_status != GSS_S_COMPLETE)
87	return major_status;
88
89    *minor_status = 0;
90
91    if (*time_rec == 0)
92	return GSS_S_CONTEXT_EXPIRED;
93
94    return GSS_S_COMPLETE;
95}
96