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("$FreeBSD$");
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#include <sys/proc.h>
38
39#include <kgssapi/gssapi.h>
40#include <kgssapi/gssapi_impl.h>
41#include <rpc/rpc.h>
42
43#include "gssd.h"
44#include "kgss_if.h"
45
46OM_uint32
47gss_init_sec_context(OM_uint32 * minor_status,
48    const gss_cred_id_t initiator_cred_handle,
49    gss_ctx_id_t * context_handle,
50    const gss_name_t target_name,
51    const gss_OID input_mech_type,
52    OM_uint32 req_flags,
53    OM_uint32 time_req,
54    const gss_channel_bindings_t input_chan_bindings,
55    const gss_buffer_t input_token,
56    gss_OID * actual_mech_type,
57    gss_buffer_t output_token,
58    OM_uint32 * ret_flags,
59    OM_uint32 * time_rec)
60{
61	struct init_sec_context_res res;
62	struct init_sec_context_args args;
63	enum clnt_stat stat;
64	gss_ctx_id_t ctx = *context_handle;
65	CLIENT *cl;
66
67	*minor_status = 0;
68
69	cl = kgss_gssd_client();
70	if (cl == NULL)
71		return (GSS_S_FAILURE);
72
73	args.uid = curthread->td_ucred->cr_uid;
74	if  (initiator_cred_handle)
75		args.cred = initiator_cred_handle->handle;
76	else
77		args.cred = 0;
78	if (ctx)
79		args.ctx = ctx->handle;
80	else
81		args.ctx = 0;
82	args.name = target_name->handle;
83	args.mech_type = input_mech_type;
84	args.req_flags = req_flags;
85	args.time_req = time_req;
86	args.input_chan_bindings = input_chan_bindings;
87	if (input_token)
88		args.input_token = *input_token;
89	else {
90		args.input_token.length = 0;
91		args.input_token.value = NULL;
92	}
93
94	bzero(&res, sizeof(res));
95	stat = gssd_init_sec_context_1(&args, &res, cl);
96	CLNT_RELEASE(cl);
97	if (stat != RPC_SUCCESS) {
98		*minor_status = stat;
99		return (GSS_S_FAILURE);
100	}
101
102	if (res.major_status != GSS_S_COMPLETE
103	    && res.major_status != GSS_S_CONTINUE_NEEDED) {
104		*minor_status = res.minor_status;
105		xdr_free((xdrproc_t) xdr_init_sec_context_res, &res);
106		return (res.major_status);
107	}
108
109	*minor_status = res.minor_status;
110
111	if (!ctx) {
112		ctx = kgss_create_context(res.actual_mech_type);
113		if (!ctx) {
114			xdr_free((xdrproc_t) xdr_init_sec_context_res, &res);
115			*minor_status = 0;
116			return (GSS_S_BAD_MECH);
117		}
118	}
119	*context_handle = ctx;
120	ctx->handle = res.ctx;
121	if (actual_mech_type)
122		*actual_mech_type = KGSS_MECH_TYPE(ctx);
123	kgss_copy_buffer(&res.output_token, output_token);
124	if (ret_flags)
125		*ret_flags = res.ret_flags;
126	if (time_rec)
127		*time_rec = res.time_rec;
128
129	xdr_free((xdrproc_t) xdr_init_sec_context_res, &res);
130
131	/*
132	 * If the context establishment is complete, export it from
133	 * userland and hand the result (which includes key material
134	 * etc.) to the kernel implementation.
135	 */
136	if (res.major_status == GSS_S_COMPLETE)
137		res.major_status = kgss_transfer_context(ctx);
138
139	return (res.major_status);
140}
141