1/*
2 * Copyright (c) 1997, 2003 Kungliga Tekniska Högskolan
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 "gsskrb5_locl.h"
35
36OM_uint32 GSSAPI_CALLCONV _gsskrb5_inquire_cred
37(OM_uint32 * minor_status,
38 const gss_cred_id_t cred_handle,
39 gss_name_t * output_name,
40 OM_uint32 * lifetime,
41 gss_cred_usage_t * cred_usage,
42 gss_OID_set * mechanisms
43    )
44{
45    krb5_context context;
46    gss_cred_id_t aqcred_init = GSS_C_NO_CREDENTIAL;
47    gss_cred_id_t aqcred_accept = GSS_C_NO_CREDENTIAL;
48    gsskrb5_cred acred = NULL, icred = NULL;
49    OM_uint32 ret;
50
51    *minor_status = 0;
52
53    if (output_name)
54	*output_name = NULL;
55    if (mechanisms)
56	*mechanisms = GSS_C_NO_OID_SET;
57
58    GSSAPI_KRB5_INIT (&context);
59
60    if (cred_handle == GSS_C_NO_CREDENTIAL) {
61	ret = _gsskrb5_acquire_cred(minor_status,
62				    GSS_C_NO_NAME,
63				    GSS_C_INDEFINITE,
64				    GSS_C_NO_OID_SET,
65				    GSS_C_ACCEPT,
66				    &aqcred_accept,
67				    NULL,
68				    NULL);
69	if (ret == GSS_S_COMPLETE)
70	    acred = (gsskrb5_cred)aqcred_accept;
71
72	ret = _gsskrb5_acquire_cred(minor_status,
73				    GSS_C_NO_NAME,
74				    GSS_C_INDEFINITE,
75				    GSS_C_NO_OID_SET,
76				    GSS_C_INITIATE,
77				    &aqcred_init,
78				    NULL,
79				    NULL);
80	if (ret == GSS_S_COMPLETE)
81	    icred = (gsskrb5_cred)aqcred_init;
82
83	if (icred == NULL && acred == NULL) {
84	    *minor_status = 0;
85	    return GSS_S_NO_CRED;
86	}
87    } else
88	acred = (gsskrb5_cred)cred_handle;
89
90    if (acred)
91	HEIMDAL_MUTEX_lock(&acred->cred_id_mutex);
92    if (icred)
93	HEIMDAL_MUTEX_lock(&icred->cred_id_mutex);
94
95    if (output_name != NULL) {
96	if (icred && icred->principal != NULL) {
97	    gss_name_t name;
98
99	    if (acred && acred->principal)
100		name = (gss_name_t)acred->principal;
101	    else
102		name = (gss_name_t)icred->principal;
103
104            ret = _gsskrb5_duplicate_name(minor_status, name, output_name);
105            if (ret)
106		goto out;
107	} else if (acred && acred->usage == GSS_C_ACCEPT) {
108	    krb5_principal princ;
109	    *minor_status = krb5_sname_to_principal(context, NULL,
110						    NULL, KRB5_NT_SRV_HST,
111						    &princ);
112	    if (*minor_status) {
113		ret = GSS_S_FAILURE;
114		goto out;
115	    }
116	    *output_name = (gss_name_t)princ;
117	} else {
118	    krb5_principal princ;
119	    *minor_status = krb5_get_default_principal(context,
120						       &princ);
121	    if (*minor_status) {
122		ret = GSS_S_FAILURE;
123		goto out;
124	    }
125	    *output_name = (gss_name_t)princ;
126	}
127    }
128    if (lifetime != NULL) {
129	OM_uint32 alife = GSS_C_INDEFINITE, ilife = GSS_C_INDEFINITE;
130
131	if (acred) alife = acred->lifetime;
132	if (icred) ilife = icred->lifetime;
133
134	ret = _gsskrb5_lifetime_left(minor_status,
135				     context,
136				     min(alife,ilife),
137				     lifetime);
138	if (ret)
139	    goto out;
140    }
141    if (cred_usage != NULL) {
142	if (acred && icred)
143	    *cred_usage = GSS_C_BOTH;
144	else if (acred)
145	    *cred_usage = GSS_C_ACCEPT;
146	else if (icred)
147	    *cred_usage = GSS_C_INITIATE;
148	else
149	    abort();
150    }
151
152    if (mechanisms != NULL) {
153        ret = gss_create_empty_oid_set(minor_status, mechanisms);
154        if (ret)
155	    goto out;
156	if (acred)
157	    ret = gss_add_oid_set_member(minor_status,
158					 &acred->mechanisms->elements[0],
159					 mechanisms);
160	if (ret == GSS_S_COMPLETE && icred)
161	    ret = gss_add_oid_set_member(minor_status,
162					 &icred->mechanisms->elements[0],
163					 mechanisms);
164        if (ret)
165	    goto out;
166    }
167    ret = GSS_S_COMPLETE;
168out:
169    if (acred)
170	HEIMDAL_MUTEX_unlock(&acred->cred_id_mutex);
171    if (icred)
172	HEIMDAL_MUTEX_unlock(&icred->cred_id_mutex);
173
174    if (aqcred_init != GSS_C_NO_CREDENTIAL)
175	ret = _gsskrb5_release_cred(minor_status, &aqcred_init);
176    if (aqcred_accept != GSS_C_NO_CREDENTIAL)
177	ret = _gsskrb5_release_cred(minor_status, &aqcred_accept);
178
179    return ret;
180}
181