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 244370 2012-12-18 00:25:48Z rmacklem $");
30
31#include <sys/param.h>
32#include <sys/kernel.h>
33#include <sys/kobj.h>
34#include <sys/lock.h>
35#include <sys/malloc.h>
36#include <sys/mutex.h>
37
38#include <kgssapi/gssapi.h>
39#include <kgssapi/gssapi_impl.h>
40#include <rpc/rpc.h>
41
42#include "gssd.h"
43#include "kgss_if.h"
44
45OM_uint32 gss_accept_sec_context(OM_uint32 *minor_status,
46 gss_ctx_id_t *context_handle,
47 const gss_cred_id_t acceptor_cred_handle,
48 const gss_buffer_t input_token,
49 const gss_channel_bindings_t input_chan_bindings,
50 gss_name_t *src_name,
51 gss_OID *mech_type,
52 gss_buffer_t output_token,
53 OM_uint32 *ret_flags,
54 OM_uint32 *time_rec,
55 gss_cred_id_t *delegated_cred_handle)
56{
57 struct accept_sec_context_res res;
58 struct accept_sec_context_args args;
59 enum clnt_stat stat;
60 gss_ctx_id_t ctx = *context_handle;
61 gss_name_t name;
62 gss_cred_id_t cred;
63 CLIENT *cl;
64
65 cl = kgss_gssd_client();
66 if (cl == NULL) {
67 *minor_status = 0;
68 return (GSS_S_FAILURE);
69 }
70
71 if (ctx)
72 args.ctx = ctx->handle;
73 else
74 args.ctx = 0;
75 if (acceptor_cred_handle)
76 args.cred = acceptor_cred_handle->handle;
77 else
78 args.cred = 0;
79 args.input_token = *input_token;
80 args.input_chan_bindings = input_chan_bindings;
81
82 bzero(&res, sizeof(res));
83 stat = gssd_accept_sec_context_1(&args, &res, cl);
84 CLNT_RELEASE(cl);
85 if (stat != RPC_SUCCESS) {
86 *minor_status = stat;
87 return (GSS_S_FAILURE);
88 }
89
90 if (res.major_status != GSS_S_COMPLETE
91 && res.major_status != GSS_S_CONTINUE_NEEDED) {
92 *minor_status = res.minor_status;
93 xdr_free((xdrproc_t) xdr_accept_sec_context_res, &res);
94 return (res.major_status);
95 }
96
97 *minor_status = res.minor_status;
98
99 if (!ctx) {
100 ctx = kgss_create_context(res.mech_type);
101 if (!ctx) {
102 xdr_free((xdrproc_t) xdr_accept_sec_context_res, &res);
103 *minor_status = 0;
104 return (GSS_S_BAD_MECH);
105 }
106 }
107 *context_handle = ctx;
108
109 ctx->handle = res.ctx;
110 name = malloc(sizeof(struct _gss_name_t), M_GSSAPI, M_WAITOK);
111 name->handle = res.src_name;
112 if (src_name) {
113 *src_name = name;
114 } else {
115 OM_uint32 junk;
116 gss_release_name(&junk, &name);
117 }
118 if (mech_type)
119 *mech_type = KGSS_MECH_TYPE(ctx);
120 kgss_copy_buffer(&res.output_token, output_token);
121 if (ret_flags)
122 *ret_flags = res.ret_flags;
123 if (time_rec)
124 *time_rec = res.time_rec;
125 cred = malloc(sizeof(struct _gss_cred_id_t), M_GSSAPI, M_WAITOK);
126 cred->handle = res.delegated_cred_handle;
127 if (delegated_cred_handle) {
128 *delegated_cred_handle = cred;
129 } else {
130 OM_uint32 junk;
131 gss_release_cred(&junk, &cred);
132 }
133
134 xdr_free((xdrproc_t) xdr_accept_sec_context_res, &res);
135
136 /*
137 * If the context establishment is complete, export it from
138 * userland and hand the result (which includes key material
139 * etc.) to the kernel implementation.
140 */
141 if (res.major_status == GSS_S_COMPLETE)
142 res.major_status = kgss_transfer_context(ctx);
143
144 return (res.major_status);
145}