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 
36 RCSID("$Id: context_time.c 19031 2006-11-13 18:02:57Z lha $");
37 
38 OM_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 
67 OM_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