1/*-
2 * Copyright (c) 2005 Doug Rabson
3 * All rights reserved.
4 *
5 * Portions Copyright (c) 2011 PADL Software Pty Ltd.
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
33OM_uint32
34_gss_acquire_mech_cred(OM_uint32 *minor_status,
35		       gssapi_mech_interface m,
36		       const struct _gss_mechanism_name *mn,
37		       gss_const_OID credential_type,
38		       const void *credential_data,
39		       OM_uint32 time_req,
40		       gss_const_OID desired_mech,
41		       gss_cred_usage_t cred_usage,
42		       struct _gss_mechanism_cred **output_cred_handle)
43{
44    OM_uint32 major_status;
45    struct _gss_mechanism_cred *mc;
46    gss_OID_set_desc set2;
47
48    *output_cred_handle = NULL;
49
50    mc = calloc(1, sizeof(struct _gss_mechanism_cred));
51    if (mc == NULL) {
52	*minor_status = ENOMEM;
53	return GSS_S_FAILURE;
54    }
55
56    mc->gmc_mech = m;
57    mc->gmc_mech_oid = &m->gm_mech_oid;
58
59    set2.count = 1;
60    set2.elements = mc->gmc_mech_oid;
61
62    if (m->gm_acquire_cred_ext) {
63	major_status = m->gm_acquire_cred_ext(minor_status,
64					      mn->gmn_name,
65					      credential_type,
66					      credential_data,
67					      time_req,
68					      mc->gmc_mech_oid,
69					      cred_usage,
70					      &mc->gmc_cred);
71    } else if (gss_oid_equal(credential_type, GSS_C_CRED_PASSWORD) &&
72		m->gm_compat &&
73		m->gm_compat->gmc_acquire_cred_with_password) {
74	/*
75	 * Shim for mechanisms that adhere to API-as-SPI and do not
76	 * implement gss_acquire_cred_ext().
77	 */
78
79	major_status = m->gm_compat->gmc_acquire_cred_with_password(minor_status,
80				mn->gmn_name,
81				(const gss_buffer_t)credential_data,
82				time_req,
83				&set2,
84				cred_usage,
85				&mc->gmc_cred,
86				NULL,
87				NULL);
88    } else if (credential_type == GSS_C_NO_OID) {
89	major_status = m->gm_acquire_cred(minor_status,
90					  mn->gmn_name,
91					  time_req,
92					  &set2,
93					  cred_usage,
94					  &mc->gmc_cred,
95					  NULL,
96					  NULL);
97    } else {
98	major_status = GSS_S_UNAVAILABLE;
99	free(mc);
100	mc= NULL;
101    }
102
103    *output_cred_handle = mc;
104    return major_status;
105}
106
107OM_uint32
108_gss_acquire_cred_ext(OM_uint32 *minor_status,
109    const gss_name_t desired_name,
110    gss_const_OID credential_type,
111    const void *credential_data,
112    OM_uint32 time_req,
113    gss_const_OID desired_mech,
114    gss_cred_usage_t cred_usage,
115    gss_cred_id_t *output_cred_handle)
116{
117    OM_uint32 major_status;
118    struct _gss_name *name = (struct _gss_name *) desired_name;
119    gssapi_mech_interface m;
120    struct _gss_cred *cred;
121    gss_OID_set_desc set, *mechs;
122    size_t i;
123
124    *minor_status = 0;
125    if (output_cred_handle == NULL)
126	return GSS_S_CALL_INACCESSIBLE_READ;
127
128    _gss_load_mech();
129
130    if (desired_mech != GSS_C_NO_OID) {
131	int match = 0;
132
133	gss_test_oid_set_member(minor_status, (gss_OID)desired_mech,
134				_gss_mech_oids, &match);
135	if (!match)
136	    return GSS_S_BAD_MECH;
137
138	set.count = 1;
139	set.elements = (gss_OID)desired_mech;
140	mechs = &set;
141    } else
142	mechs = _gss_mech_oids;
143
144    cred = calloc(1, sizeof(*cred));
145    if (cred == NULL) {
146	*minor_status = ENOMEM;
147	return GSS_S_FAILURE;
148    }
149
150    HEIM_SLIST_INIT(&cred->gc_mc);
151
152    for (i = 0; i < mechs->count; i++) {
153	struct _gss_mechanism_name *mn = NULL;
154	struct _gss_mechanism_cred *mc = NULL;
155	gss_name_t desired_mech_name = GSS_C_NO_NAME;
156
157	m = __gss_get_mechanism(&mechs->elements[i]);
158	if (!m)
159	    continue;
160
161	if (desired_name != GSS_C_NO_NAME) {
162	    major_status = _gss_find_mn(minor_status, name,
163					&mechs->elements[i], &mn);
164	    if (major_status != GSS_S_COMPLETE)
165		continue;
166
167	    desired_mech_name = mn->gmn_name;
168	}
169
170	major_status = _gss_acquire_mech_cred(minor_status, m, mn,
171					      credential_type, credential_data,
172					      time_req, desired_mech, cred_usage,
173					      &mc);
174	if (GSS_ERROR(major_status))
175	    continue;
176
177	HEIM_SLIST_INSERT_HEAD(&cred->gc_mc, mc, gmc_link);
178    }
179
180    /*
181     * If we didn't manage to create a single credential, return
182     * an error.
183     */
184    if (!HEIM_SLIST_FIRST(&cred->gc_mc)) {
185	free(cred);
186	*minor_status = 0;
187	return GSS_S_NO_CRED;
188    }
189
190    *output_cred_handle = (gss_cred_id_t) cred;
191    *minor_status = 0;
192    return GSS_S_COMPLETE;
193}
194