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 <errno.h>
32
33 #include "mech_switch.h"
34 #include "context.h"
35
36 OM_uint32
gss_import_sec_context(OM_uint32 * minor_status,const gss_buffer_t interprocess_token,gss_ctx_id_t * context_handle)37 gss_import_sec_context(OM_uint32 *minor_status,
38 const gss_buffer_t interprocess_token,
39 gss_ctx_id_t *context_handle)
40 {
41 OM_uint32 major_status;
42 struct _gss_mech_switch *m;
43 struct _gss_context *ctx;
44 gss_OID_desc mech_oid;
45 gss_buffer_desc buf;
46 unsigned char *p;
47 size_t len;
48
49 *minor_status = 0;
50 *context_handle = GSS_C_NO_CONTEXT;
51
52 /*
53 * We added an oid to the front of the token in
54 * gss_export_sec_context.
55 */
56 p = interprocess_token->value;
57 len = interprocess_token->length;
58 if (len < 2)
59 return (GSS_S_DEFECTIVE_TOKEN);
60 mech_oid.length = (p[0] << 8) | p[1];
61 if (len < mech_oid.length + 2)
62 return (GSS_S_DEFECTIVE_TOKEN);
63 mech_oid.elements = p + 2;
64 buf.length = len - 2 - mech_oid.length;
65 buf.value = p + 2 + mech_oid.length;
66
67 m = _gss_find_mech_switch(&mech_oid);
68 if (!m)
69 return (GSS_S_DEFECTIVE_TOKEN);
70
71 ctx = malloc(sizeof(struct _gss_context));
72 if (!ctx) {
73 *minor_status = ENOMEM;
74 return (GSS_S_FAILURE);
75 }
76 ctx->gc_mech = m;
77 major_status = m->gm_import_sec_context(minor_status,
78 &buf, &ctx->gc_ctx);
79 if (major_status != GSS_S_COMPLETE) {
80 _gss_mg_error(m, major_status, *minor_status);
81 free(ctx);
82 } else {
83 *context_handle = (gss_ctx_id_t) ctx;
84 }
85
86 return (major_status);
87 }
88