1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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
29 #include <gssapi/gssapi.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <errno.h>
33
34 #include "mech_switch.h"
35 #include "name.h"
36 #include "cred.h"
37 #include "context.h"
38 #include "utils.h"
39
40 static gss_cred_id_t
_gss_mech_cred_find(gss_cred_id_t cred_handle,gss_OID mech_type)41 _gss_mech_cred_find(gss_cred_id_t cred_handle, gss_OID mech_type)
42 {
43 struct _gss_cred *cred = (struct _gss_cred *)cred_handle;
44 struct _gss_mechanism_cred *mc;
45
46 if (cred == NULL)
47 return GSS_C_NO_CREDENTIAL;
48
49 SLIST_FOREACH(mc, &cred->gc_mc, gmc_link) {
50 if (gss_oid_equal(mech_type, mc->gmc_mech_oid))
51 return mc->gmc_cred;
52 }
53 return GSS_C_NO_CREDENTIAL;
54 }
55
56 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)57 gss_init_sec_context(OM_uint32 * minor_status,
58 const gss_cred_id_t initiator_cred_handle,
59 gss_ctx_id_t * context_handle,
60 const gss_name_t target_name,
61 const gss_OID input_mech_type,
62 OM_uint32 req_flags,
63 OM_uint32 time_req,
64 const gss_channel_bindings_t input_chan_bindings,
65 const gss_buffer_t input_token,
66 gss_OID * actual_mech_type,
67 gss_buffer_t output_token,
68 OM_uint32 * ret_flags,
69 OM_uint32 * time_rec)
70 {
71 OM_uint32 major_status;
72 struct _gss_mech_switch *m;
73 struct _gss_name *name = (struct _gss_name *) target_name;
74 struct _gss_mechanism_name *mn;
75 struct _gss_context *ctx = (struct _gss_context *) *context_handle;
76 gss_cred_id_t cred_handle;
77 int allocated_ctx;
78 gss_OID mech_type = input_mech_type;
79
80 *minor_status = 0;
81
82 _gss_buffer_zero(output_token);
83 if (actual_mech_type)
84 *actual_mech_type = GSS_C_NO_OID;
85 if (ret_flags)
86 *ret_flags = 0;
87 if (time_rec)
88 *time_rec = 0;
89
90 /*
91 * If we haven't allocated a context yet, do so now and lookup
92 * the mechanism switch table. If we have one already, make
93 * sure we use the same mechanism switch as before.
94 */
95 if (!ctx) {
96 if (mech_type == GSS_C_NO_OID) {
97 _gss_load_mech();
98 if (_gss_mech_oids == GSS_C_NO_OID_SET
99 || _gss_mech_oids->count == 0)
100 return (GSS_S_BAD_MECH);
101 mech_type = &_gss_mech_oids->elements[0];
102 }
103
104 ctx = malloc(sizeof(struct _gss_context));
105 if (!ctx) {
106 *minor_status = ENOMEM;
107 return (GSS_S_FAILURE);
108 }
109 memset(ctx, 0, sizeof(struct _gss_context));
110 m = ctx->gc_mech = _gss_find_mech_switch(mech_type);
111 if (!m) {
112 free(ctx);
113 return (GSS_S_BAD_MECH);
114 }
115 allocated_ctx = 1;
116 } else {
117 m = ctx->gc_mech;
118 mech_type = &ctx->gc_mech->gm_mech_oid;
119 allocated_ctx = 0;
120 }
121
122 /*
123 * Find the MN for this mechanism.
124 */
125 major_status = _gss_find_mn(minor_status, name, mech_type, &mn);
126 if (major_status != GSS_S_COMPLETE) {
127 if (allocated_ctx)
128 free(ctx);
129 return (major_status);
130 }
131
132 /*
133 * If we have a cred, find the cred for this mechanism.
134 */
135 cred_handle = _gss_mech_cred_find(initiator_cred_handle, mech_type);
136
137 major_status = m->gm_init_sec_context(minor_status,
138 cred_handle,
139 &ctx->gc_ctx,
140 mn->gmn_name,
141 mech_type,
142 req_flags,
143 time_req,
144 input_chan_bindings,
145 input_token,
146 actual_mech_type,
147 output_token,
148 ret_flags,
149 time_rec);
150
151 if (major_status != GSS_S_COMPLETE
152 && major_status != GSS_S_CONTINUE_NEEDED) {
153 if (allocated_ctx)
154 free(ctx);
155 _gss_buffer_zero(output_token);
156 _gss_mg_error(m, major_status, *minor_status);
157 } else {
158 *context_handle = (gss_ctx_id_t) ctx;
159 }
160
161 return (major_status);
162 }
163