gss_init_sec_context.c revision 153838 
1/*-
2 * Copyright (c) 2005 Doug Rabson
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 *	$FreeBSD: head/lib/libgssapi/gss_init_sec_context.c 153838 2005-12-29 14:40:22Z dfr $
27 */
28
29#include <gssapi/gssapi.h>
30#include <stdlib.h>
31#include <errno.h>
32
33#include "mech_switch.h"
34#include "name.h"
35#include "cred.h"
36#include "context.h"
37
38OM_uint32
39gss_init_sec_context(OM_uint32 * minor_status,
40    const gss_cred_id_t initiator_cred_handle,
41    gss_ctx_id_t * context_handle,
42    const gss_name_t target_name,
43    const gss_OID mech_type,
44    OM_uint32 req_flags,
45    OM_uint32 time_req,
46    const gss_channel_bindings_t input_chan_bindings,
47    const gss_buffer_t input_token,
48    gss_OID * actual_mech_type,
49    gss_buffer_t output_token,
50    OM_uint32 * ret_flags,
51    OM_uint32 * time_rec)
52{
53	OM_uint32 major_status;
54	struct _gss_mech_switch *m;
55	struct _gss_name *name = (struct _gss_name *) target_name;
56	struct _gss_mechanism_name *mn;
57	struct _gss_context *ctx = (struct _gss_context *) *context_handle;
58	struct _gss_cred *cred = (struct _gss_cred *) initiator_cred_handle;
59	struct _gss_mechanism_cred *mc;
60	gss_cred_id_t cred_handle;
61	int allocated_ctx;
62
63	*minor_status = 0;
64
65	/*
66	 * If we haven't allocated a context yet, do so now and lookup
67	 * the mechanism switch table. If we have one already, make
68	 * sure we use the same mechanism switch as before.
69	 */
70	if (!ctx) {
71		ctx = malloc(sizeof(struct _gss_context));
72		if (!ctx) {
73			*minor_status = ENOMEM;
74			return (GSS_S_FAILURE);
75		}
76		memset(ctx, 0, sizeof(struct _gss_context));
77		m = ctx->gc_mech = _gss_find_mech_switch(mech_type);
78		if (!m) {
79			free(ctx);
80			return (GSS_S_BAD_MECH);
81		}
82		allocated_ctx = 1;
83	} else {
84		m = ctx->gc_mech;
85		allocated_ctx = 0;
86	}
87
88	/*
89	 * Find the MN for this mechanism.
90	 */
91	mn = _gss_find_mn(name, mech_type);
92
93	/*
94	 * If we have a cred, find the cred for this mechanism.
95	 */
96	cred_handle = GSS_C_NO_CREDENTIAL;
97	if (cred) {
98		SLIST_FOREACH(mc, &cred->gc_mc, gmc_link) {
99			if (_gss_oid_equal(mech_type, mc->gmc_mech_oid)) {
100				cred_handle = mc->gmc_cred;
101				break;
102			}
103		}
104	}
105
106	major_status = m->gm_init_sec_context(minor_status,
107	    cred_handle,
108	    &ctx->gc_ctx,
109	    mn->gmn_name,
110	    mech_type,
111	    req_flags,
112	    time_req,
113	    input_chan_bindings,
114	    input_token,
115	    actual_mech_type,
116	    output_token,
117	    ret_flags,
118	    time_rec);
119
120	if (major_status != GSS_S_COMPLETE
121	    && major_status != GSS_S_CONTINUE_NEEDED) {
122		if (allocated_ctx)
123			free(ctx);
124	} else {
125		*context_handle = (gss_ctx_id_t) ctx;
126	}
127
128	return (major_status);
129}
130