1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2008 Isilon Inc http://www.isilon.com/
5 * Authors: Doug Rabson <dfr@rabson.org>
6 * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/param.h>
31#include <sys/kernel.h>
32#include <sys/kobj.h>
33#include <sys/lock.h>
34#include <sys/malloc.h>
35#include <sys/mutex.h>
36
37#include <kgssapi/gssapi.h>
38#include <kgssapi/gssapi_impl.h>
39#include <rpc/rpc.h>
40
41#include "gssd.h"
42#include "kgss_if.h"
43
44OM_uint32 gss_accept_sec_context(OM_uint32 *minor_status,
45    gss_ctx_id_t *context_handle,
46    const gss_cred_id_t acceptor_cred_handle,
47    const gss_buffer_t input_token,
48    const gss_channel_bindings_t input_chan_bindings,
49    gss_name_t *src_name,
50    gss_OID *mech_type,
51    gss_buffer_t output_token,
52    OM_uint32 *ret_flags,
53    OM_uint32 *time_rec,
54    gss_cred_id_t *delegated_cred_handle)
55{
56	struct accept_sec_context_res res;
57	struct accept_sec_context_args args;
58	enum clnt_stat stat;
59	gss_ctx_id_t ctx = *context_handle;
60	gss_name_t name;
61	gss_cred_id_t cred;
62	CLIENT *cl;
63
64	cl = kgss_gssd_client();
65	if (cl == NULL) {
66		*minor_status = 0;
67		return (GSS_S_FAILURE);
68	}
69
70	if (ctx)
71		args.ctx = ctx->handle;
72	else
73		args.ctx = 0;
74	if (acceptor_cred_handle)
75		args.cred = acceptor_cred_handle->handle;
76	else
77		args.cred = 0;
78	args.input_token = *input_token;
79	args.input_chan_bindings = input_chan_bindings;
80
81	bzero(&res, sizeof(res));
82	stat = gssd_accept_sec_context_1(&args, &res, cl);
83	CLNT_RELEASE(cl);
84	if (stat != RPC_SUCCESS) {
85		*minor_status = stat;
86		return (GSS_S_FAILURE);
87	}
88
89	if (res.major_status != GSS_S_COMPLETE
90	    && res.major_status != GSS_S_CONTINUE_NEEDED) {
91		*minor_status = res.minor_status;
92		xdr_free((xdrproc_t) xdr_accept_sec_context_res, &res);
93		return (res.major_status);
94	}
95
96	*minor_status = res.minor_status;
97
98	if (!ctx) {
99		ctx = kgss_create_context(res.mech_type);
100		if (!ctx) {
101			xdr_free((xdrproc_t) xdr_accept_sec_context_res, &res);
102			*minor_status = 0;
103			return (GSS_S_BAD_MECH);
104		}
105	}
106	*context_handle = ctx;
107
108	ctx->handle = res.ctx;
109	name = malloc(sizeof(struct _gss_name_t), M_GSSAPI, M_WAITOK);
110	name->handle = res.src_name;
111	if (src_name) {
112		*src_name = name;
113	} else {
114		OM_uint32 junk;
115		gss_release_name(&junk, &name);
116	}
117	if (mech_type)
118		*mech_type = KGSS_MECH_TYPE(ctx);
119	kgss_copy_buffer(&res.output_token, output_token);
120	if (ret_flags)
121		*ret_flags = res.ret_flags;
122	if (time_rec)
123		*time_rec = res.time_rec;
124	cred = malloc(sizeof(struct _gss_cred_id_t), M_GSSAPI, M_WAITOK);
125	cred->handle = res.delegated_cred_handle;
126	if (delegated_cred_handle) {
127		*delegated_cred_handle = cred;
128	} else {
129		OM_uint32 junk;
130		gss_release_cred(&junk, &cred);
131	}
132
133	xdr_free((xdrproc_t) xdr_accept_sec_context_res, &res);
134
135	/*
136	 * If the context establishment is complete, export it from
137	 * userland and hand the result (which includes key material
138	 * etc.) to the kernel implementation.
139	 */
140	if (res.major_status == GSS_S_COMPLETE)
141		res.major_status = kgss_transfer_context(ctx);
142
143	return (res.major_status);
144}
145