gss_accept_sec_context.c revision 184588 
1/*-
2 * Copyright (c) 2008 Isilon Inc http://www.isilon.com/
3 * Authors: Doug Rabson <dfr@rabson.org>
4 * Developed with Red Inc: Alfred Perlstein <alfred@freebsd.org>
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 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD: head/sys/kgssapi/gss_accept_sec_context.c 184588 2008-11-03 10:38:00Z dfr $");
30
31#include <sys/param.h>
32#include <sys/kernel.h>
33#include <sys/kobj.h>
34#include <sys/malloc.h>
35
36#include <kgssapi/gssapi.h>
37#include <kgssapi/gssapi_impl.h>
38#include <rpc/rpc.h>
39
40#include "gssd.h"
41#include "kgss_if.h"
42
43OM_uint32 gss_accept_sec_context(OM_uint32 *minor_status,
44    gss_ctx_id_t *context_handle,
45    const gss_cred_id_t acceptor_cred_handle,
46    const gss_buffer_t input_token,
47    const gss_channel_bindings_t input_chan_bindings,
48    gss_name_t *src_name,
49    gss_OID *mech_type,
50    gss_buffer_t output_token,
51    OM_uint32 *ret_flags,
52    OM_uint32 *time_rec,
53    gss_cred_id_t *delegated_cred_handle)
54{
55	struct accept_sec_context_res res;
56	struct accept_sec_context_args args;
57	enum clnt_stat stat;
58	gss_ctx_id_t ctx = *context_handle;
59	gss_name_t name;
60	gss_cred_id_t cred;
61
62	if (!kgss_gssd_handle)
63		return (GSS_S_FAILURE);
64
65	if (ctx)
66		args.ctx = ctx->handle;
67	else
68		args.ctx = 0;
69	if (acceptor_cred_handle)
70		args.cred = acceptor_cred_handle->handle;
71	else
72		args.cred = 0;
73	args.input_token = *input_token;
74	args.input_chan_bindings = input_chan_bindings;
75
76	bzero(&res, sizeof(res));
77	stat = gssd_accept_sec_context_1(&args, &res, kgss_gssd_handle);
78	if (stat != RPC_SUCCESS) {
79		*minor_status = stat;
80		return (GSS_S_FAILURE);
81	}
82
83	if (res.major_status != GSS_S_COMPLETE
84	    && res.major_status != GSS_S_CONTINUE_NEEDED) {
85		*minor_status = res.minor_status;
86		xdr_free((xdrproc_t) xdr_accept_sec_context_res, &res);
87		return (res.major_status);
88	}
89
90	*minor_status = res.minor_status;
91
92	if (!ctx) {
93		ctx = kgss_create_context(res.mech_type);
94		if (!ctx) {
95			xdr_free((xdrproc_t) xdr_accept_sec_context_res, &res);
96			*minor_status = 0;
97			return (GSS_S_BAD_MECH);
98		}
99	}
100	*context_handle = ctx;
101
102	ctx->handle = res.ctx;
103	name = malloc(sizeof(struct _gss_name_t), M_GSSAPI, M_WAITOK);
104	name->handle = res.src_name;
105	if (src_name) {
106		*src_name = name;
107	} else {
108		OM_uint32 junk;
109		gss_release_name(&junk, &name);
110	}
111	if (mech_type)
112		*mech_type = KGSS_MECH_TYPE(ctx);
113	kgss_copy_buffer(&res.output_token, output_token);
114	if (ret_flags)
115		*ret_flags = res.ret_flags;
116	if (time_rec)
117		*time_rec = res.time_rec;
118	cred = malloc(sizeof(struct _gss_cred_id_t), M_GSSAPI, M_WAITOK);
119	cred->handle = res.delegated_cred_handle;
120	if (delegated_cred_handle) {
121		*delegated_cred_handle = cred;
122	} else {
123		OM_uint32 junk;
124		gss_release_cred(&junk, &cred);
125	}
126
127	xdr_free((xdrproc_t) xdr_accept_sec_context_res, &res);
128
129	/*
130	 * If the context establishment is complete, export it from
131	 * userland and hand the result (which includes key material
132	 * etc.) to the kernel implementation.
133	 */
134	if (res.major_status == GSS_S_COMPLETE)
135		res.major_status = kgss_transfer_context(ctx);
136
137	return (res.major_status);
138}
139