1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2005 Doug Rabson
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * $FreeBSD$
29 */
30
31 #include <gssapi/gssapi.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <errno.h>
35
36 #include "mech_switch.h"
37 #include "name.h"
38 #include "cred.h"
39 #include "context.h"
40 #include "utils.h"
41
42 static gss_cred_id_t
_gss_mech_cred_find(gss_cred_id_t cred_handle,gss_OID mech_type)43 _gss_mech_cred_find(gss_cred_id_t cred_handle, gss_OID mech_type)
44 {
45 struct _gss_cred *cred = (struct _gss_cred *)cred_handle;
46 struct _gss_mechanism_cred *mc;
47
48 if (cred == NULL)
49 return GSS_C_NO_CREDENTIAL;
50
51 SLIST_FOREACH(mc, &cred->gc_mc, gmc_link) {
52 if (gss_oid_equal(mech_type, mc->gmc_mech_oid))
53 return mc->gmc_cred;
54 }
55 return GSS_C_NO_CREDENTIAL;
56 }
57
58 OM_uint32
gss_init_sec_context(OM_uint32 * minor_status,const gss_cred_id_t initiator_cred_handle,gss_ctx_id_t * context_handle,const gss_name_t target_name,const gss_OID input_mech_type,OM_uint32 req_flags,OM_uint32 time_req,const gss_channel_bindings_t input_chan_bindings,const gss_buffer_t input_token,gss_OID * actual_mech_type,gss_buffer_t output_token,OM_uint32 * ret_flags,OM_uint32 * time_rec)59 gss_init_sec_context(OM_uint32 * minor_status,
60 const gss_cred_id_t initiator_cred_handle,
61 gss_ctx_id_t * context_handle,
62 const gss_name_t target_name,
63 const gss_OID input_mech_type,
64 OM_uint32 req_flags,
65 OM_uint32 time_req,
66 const gss_channel_bindings_t input_chan_bindings,
67 const gss_buffer_t input_token,
68 gss_OID * actual_mech_type,
69 gss_buffer_t output_token,
70 OM_uint32 * ret_flags,
71 OM_uint32 * time_rec)
72 {
73 OM_uint32 major_status;
74 struct _gss_mech_switch *m;
75 struct _gss_name *name = (struct _gss_name *) target_name;
76 struct _gss_mechanism_name *mn;
77 struct _gss_context *ctx = (struct _gss_context *) *context_handle;
78 gss_cred_id_t cred_handle;
79 int allocated_ctx;
80 gss_OID mech_type = input_mech_type;
81
82 *minor_status = 0;
83
84 _gss_buffer_zero(output_token);
85 if (actual_mech_type)
86 *actual_mech_type = GSS_C_NO_OID;
87 if (ret_flags)
88 *ret_flags = 0;
89 if (time_rec)
90 *time_rec = 0;
91
92 /*
93 * If we haven't allocated a context yet, do so now and lookup
94 * the mechanism switch table. If we have one already, make
95 * sure we use the same mechanism switch as before.
96 */
97 if (!ctx) {
98 if (mech_type == GSS_C_NO_OID) {
99 _gss_load_mech();
100 if (_gss_mech_oids == GSS_C_NO_OID_SET
101 || _gss_mech_oids->count == 0)
102 return (GSS_S_BAD_MECH);
103 mech_type = &_gss_mech_oids->elements[0];
104 }
105
106 ctx = malloc(sizeof(struct _gss_context));
107 if (!ctx) {
108 *minor_status = ENOMEM;
109 return (GSS_S_FAILURE);
110 }
111 memset(ctx, 0, sizeof(struct _gss_context));
112 m = ctx->gc_mech = _gss_find_mech_switch(mech_type);
113 if (!m) {
114 free(ctx);
115 return (GSS_S_BAD_MECH);
116 }
117 allocated_ctx = 1;
118 } else {
119 m = ctx->gc_mech;
120 mech_type = &ctx->gc_mech->gm_mech_oid;
121 allocated_ctx = 0;
122 }
123
124 /*
125 * Find the MN for this mechanism.
126 */
127 major_status = _gss_find_mn(minor_status, name, mech_type, &mn);
128 if (major_status != GSS_S_COMPLETE) {
129 if (allocated_ctx)
130 free(ctx);
131 return (major_status);
132 }
133
134 /*
135 * If we have a cred, find the cred for this mechanism.
136 */
137 cred_handle = _gss_mech_cred_find(initiator_cred_handle, mech_type);
138
139 major_status = m->gm_init_sec_context(minor_status,
140 cred_handle,
141 &ctx->gc_ctx,
142 mn->gmn_name,
143 mech_type,
144 req_flags,
145 time_req,
146 input_chan_bindings,
147 input_token,
148 actual_mech_type,
149 output_token,
150 ret_flags,
151 time_rec);
152
153 if (major_status != GSS_S_COMPLETE
154 && major_status != GSS_S_CONTINUE_NEEDED) {
155 if (allocated_ctx)
156 free(ctx);
157 _gss_buffer_zero(output_token);
158 _gss_mg_error(m, major_status, *minor_status);
159 } else {
160 *context_handle = (gss_ctx_id_t) ctx;
161 }
162
163 return (major_status);
164 }
165