1 /* $NetBSD: gss_import_sec_context.c,v 1.2 2017/01/28 21:31:46 christos Exp $ */
2
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: src/lib/libgssapi/gss_import_sec_context.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
29 */
30
31 #include "mech_locl.h"
32
33 GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
gss_import_sec_context(OM_uint32 * minor_status,const gss_buffer_t interprocess_token,gss_ctx_id_t * context_handle)34 gss_import_sec_context(OM_uint32 *minor_status,
35 const gss_buffer_t interprocess_token,
36 gss_ctx_id_t *context_handle)
37 {
38 OM_uint32 major_status;
39 gssapi_mech_interface m;
40 struct _gss_context *ctx;
41 gss_OID_desc mech_oid;
42 gss_buffer_desc buf;
43 unsigned char *p;
44 size_t len;
45
46 *minor_status = 0;
47 *context_handle = GSS_C_NO_CONTEXT;
48
49 /*
50 * We added an oid to the front of the token in
51 * gss_export_sec_context.
52 */
53 p = interprocess_token->value;
54 len = interprocess_token->length;
55 if (len < 2)
56 return (GSS_S_DEFECTIVE_TOKEN);
57 mech_oid.length = (p[0] << 8) | p[1];
58 if (len < mech_oid.length + 2)
59 return (GSS_S_DEFECTIVE_TOKEN);
60 mech_oid.elements = p + 2;
61 buf.length = len - 2 - mech_oid.length;
62 buf.value = p + 2 + mech_oid.length;
63
64 m = __gss_get_mechanism(&mech_oid);
65 if (!m)
66 return (GSS_S_DEFECTIVE_TOKEN);
67
68 ctx = malloc(sizeof(struct _gss_context));
69 if (!ctx) {
70 *minor_status = ENOMEM;
71 return (GSS_S_FAILURE);
72 }
73 ctx->gc_mech = m;
74 major_status = m->gm_import_sec_context(minor_status,
75 &buf, &ctx->gc_ctx);
76 if (major_status != GSS_S_COMPLETE) {
77 _gss_mg_error(m, major_status, *minor_status);
78 free(ctx);
79 } else {
80 *context_handle = (gss_ctx_id_t) ctx;
81 }
82
83 return (major_status);
84 }
85