1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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/cdefs.h>
31__FBSDID("$FreeBSD$");
32
33#include <sys/param.h>
34#include <sys/kernel.h>
35#include <sys/kobj.h>
36#include <sys/lock.h>
37#include <sys/malloc.h>
38#include <sys/mutex.h>
39
40#include <kgssapi/gssapi.h>
41#include <kgssapi/gssapi_impl.h>
42#include <rpc/rpc.h>
43
44#include "gssd.h"
45#include "kgss_if.h"
46
47OM_uint32 gss_accept_sec_context(OM_uint32 *minor_status,
48    gss_ctx_id_t *context_handle,
49    const gss_cred_id_t acceptor_cred_handle,
50    const gss_buffer_t input_token,
51    const gss_channel_bindings_t input_chan_bindings,
52    gss_name_t *src_name,
53    gss_OID *mech_type,
54    gss_buffer_t output_token,
55    OM_uint32 *ret_flags,
56    OM_uint32 *time_rec,
57    gss_cred_id_t *delegated_cred_handle)
58{
59	struct accept_sec_context_res res;
60	struct accept_sec_context_args args;
61	enum clnt_stat stat;
62	gss_ctx_id_t ctx = *context_handle;
63	gss_name_t name;
64	gss_cred_id_t cred;
65	CLIENT *cl;
66
67	cl = kgss_gssd_client();
68	if (cl == NULL) {
69		*minor_status = 0;
70		return (GSS_S_FAILURE);
71	}
72
73	if (ctx)
74		args.ctx = ctx->handle;
75	else
76		args.ctx = 0;
77	if (acceptor_cred_handle)
78		args.cred = acceptor_cred_handle->handle;
79	else
80		args.cred = 0;
81	args.input_token = *input_token;
82	args.input_chan_bindings = input_chan_bindings;
83
84	bzero(&res, sizeof(res));
85	stat = gssd_accept_sec_context_1(&args, &res, cl);
86	CLNT_RELEASE(cl);
87	if (stat != RPC_SUCCESS) {
88		*minor_status = stat;
89		return (GSS_S_FAILURE);
90	}
91
92	if (res.major_status != GSS_S_COMPLETE
93	    && res.major_status != GSS_S_CONTINUE_NEEDED) {
94		*minor_status = res.minor_status;
95		xdr_free((xdrproc_t) xdr_accept_sec_context_res, &res);
96		return (res.major_status);
97	}
98
99	*minor_status = res.minor_status;
100
101	if (!ctx) {
102		ctx = kgss_create_context(res.mech_type);
103		if (!ctx) {
104			xdr_free((xdrproc_t) xdr_accept_sec_context_res, &res);
105			*minor_status = 0;
106			return (GSS_S_BAD_MECH);
107		}
108	}
109	*context_handle = ctx;
110
111	ctx->handle = res.ctx;
112	name = malloc(sizeof(struct _gss_name_t), M_GSSAPI, M_WAITOK);
113	name->handle = res.src_name;
114	if (src_name) {
115		*src_name = name;
116	} else {
117		OM_uint32 junk;
118		gss_release_name(&junk, &name);
119	}
120	if (mech_type)
121		*mech_type = KGSS_MECH_TYPE(ctx);
122	kgss_copy_buffer(&res.output_token, output_token);
123	if (ret_flags)
124		*ret_flags = res.ret_flags;
125	if (time_rec)
126		*time_rec = res.time_rec;
127	cred = malloc(sizeof(struct _gss_cred_id_t), M_GSSAPI, M_WAITOK);
128	cred->handle = res.delegated_cred_handle;
129	if (delegated_cred_handle) {
130		*delegated_cred_handle = cred;
131	} else {
132		OM_uint32 junk;
133		gss_release_cred(&junk, &cred);
134	}
135
136	xdr_free((xdrproc_t) xdr_accept_sec_context_res, &res);
137
138	/*
139	 * If the context establishment is complete, export it from
140	 * userland and hand the result (which includes key material
141	 * etc.) to the kernel implementation.
142	 */
143	if (res.major_status == GSS_S_COMPLETE)
144		res.major_status = kgss_transfer_context(ctx);
145
146	return (res.major_status);
147}
148