gss_acquire_cred.c revision 1.1.1.1 
1/*	$NetBSD: gss_acquire_cred.c,v 1.1.1.1 2011/04/13 18:14:46 elric Exp $	*/
2
3/*-
4 * Copyright (c) 2005 Doug Rabson
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 *	$FreeBSD: src/lib/libgssapi/gss_acquire_cred.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
29 */
30
31#include "mech_locl.h"
32
33GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
34gss_acquire_cred(OM_uint32 *minor_status,
35    const gss_name_t desired_name,
36    OM_uint32 time_req,
37    const gss_OID_set desired_mechs,
38    gss_cred_usage_t cred_usage,
39    gss_cred_id_t *output_cred_handle,
40    gss_OID_set *actual_mechs,
41    OM_uint32 *time_rec)
42{
43	OM_uint32 major_status;
44	gss_OID_set mechs = desired_mechs;
45	gss_OID_set_desc set;
46	struct _gss_name *name = (struct _gss_name *) desired_name;
47	gssapi_mech_interface m;
48	struct _gss_cred *cred;
49	struct _gss_mechanism_cred *mc;
50	OM_uint32 min_time, cred_time;
51	int i;
52
53	*minor_status = 0;
54	if (output_cred_handle == NULL)
55	    return GSS_S_CALL_INACCESSIBLE_READ;
56	if (actual_mechs)
57	    *actual_mechs = GSS_C_NO_OID_SET;
58	if (time_rec)
59	    *time_rec = 0;
60
61	_gss_load_mech();
62
63	/*
64	 * First make sure that at least one of the requested
65	 * mechanisms is one that we support.
66	 */
67	if (mechs) {
68		for (i = 0; i < mechs->count; i++) {
69			int t;
70			gss_test_oid_set_member(minor_status,
71			    &mechs->elements[i], _gss_mech_oids, &t);
72			if (t)
73				break;
74		}
75		if (i == mechs->count) {
76			*minor_status = 0;
77			return (GSS_S_BAD_MECH);
78		}
79	}
80
81	if (actual_mechs) {
82		major_status = gss_create_empty_oid_set(minor_status,
83		    actual_mechs);
84		if (major_status)
85			return (major_status);
86	}
87
88	cred = malloc(sizeof(struct _gss_cred));
89	if (!cred) {
90		if (actual_mechs)
91			gss_release_oid_set(minor_status, actual_mechs);
92		*minor_status = ENOMEM;
93		return (GSS_S_FAILURE);
94	}
95	HEIM_SLIST_INIT(&cred->gc_mc);
96
97	if (mechs == GSS_C_NO_OID_SET)
98		mechs = _gss_mech_oids;
99
100	set.count = 1;
101	min_time = GSS_C_INDEFINITE;
102	for (i = 0; i < mechs->count; i++) {
103		struct _gss_mechanism_name *mn = NULL;
104
105		m = __gss_get_mechanism(&mechs->elements[i]);
106		if (!m)
107			continue;
108
109		if (desired_name != GSS_C_NO_NAME) {
110			major_status = _gss_find_mn(minor_status, name,
111						    &mechs->elements[i], &mn);
112			if (major_status != GSS_S_COMPLETE)
113				continue;
114		}
115
116		mc = malloc(sizeof(struct _gss_mechanism_cred));
117		if (!mc) {
118			continue;
119		}
120		mc->gmc_mech = m;
121		mc->gmc_mech_oid = &m->gm_mech_oid;
122
123		/*
124		 * XXX Probably need to do something with actual_mechs.
125		 */
126		set.elements = &mechs->elements[i];
127		major_status = m->gm_acquire_cred(minor_status,
128		    (desired_name != GSS_C_NO_NAME
129			? mn->gmn_name : GSS_C_NO_NAME),
130		    time_req, &set, cred_usage,
131		    &mc->gmc_cred, NULL, &cred_time);
132		if (major_status) {
133			free(mc);
134			continue;
135		}
136		if (cred_time < min_time)
137			min_time = cred_time;
138
139		if (actual_mechs) {
140			major_status = gss_add_oid_set_member(minor_status,
141			    mc->gmc_mech_oid, actual_mechs);
142			if (major_status) {
143				m->gm_release_cred(minor_status,
144				    &mc->gmc_cred);
145				free(mc);
146				continue;
147			}
148		}
149
150		HEIM_SLIST_INSERT_HEAD(&cred->gc_mc, mc, gmc_link);
151	}
152
153	/*
154	 * If we didn't manage to create a single credential, return
155	 * an error.
156	 */
157	if (!HEIM_SLIST_FIRST(&cred->gc_mc)) {
158		free(cred);
159		if (actual_mechs)
160			gss_release_oid_set(minor_status, actual_mechs);
161		*minor_status = 0;
162		return (GSS_S_NO_CRED);
163	}
164
165	if (time_rec)
166		*time_rec = min_time;
167	*output_cred_handle = (gss_cred_id_t) cred;
168	*minor_status = 0;
169	return (GSS_S_COMPLETE);
170}
171