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