1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/*-
* Copyright (c) 2005 Doug Rabson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD: src/lib/libgssapi/gss_export_sec_context.c,v 1.1 2005/12/29 14:40:20 dfr Exp $
*/
#include "mech_locl.h"
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
gss_export_sec_context(OM_uint32 *minor_status,
gss_ctx_id_t *context_handle,
gss_buffer_t interprocess_token)
{
OM_uint32 major_status = GSS_S_FAILURE, tmp_minor;
krb5_storage *sp;
krb5_data data;
krb5_error_code kret;
struct _gss_context *ctx;
gssapi_mech_interface m;
gss_buffer_desc buf = GSS_C_EMPTY_BUFFER;
unsigned char verflags;
*minor_status = 0;
if (!interprocess_token)
return GSS_S_CALL_INACCESSIBLE_READ;
_mg_buffer_zero(interprocess_token);
if (context_handle == NULL)
return GSS_S_NO_CONTEXT;
ctx = (struct _gss_context *) *context_handle;
if (ctx == NULL)
return GSS_S_NO_CONTEXT;
sp = krb5_storage_emem();
if (sp == NULL) {
*minor_status = ENOMEM;
goto failure;
}
krb5_storage_set_byteorder(sp, KRB5_STORAGE_BYTEORDER_PACKED);
verflags = 0x00; /* Version 0 */
if (ctx->gc_target_len)
verflags |= EXPORT_CONTEXT_FLAG_ACCUMULATING;
if (ctx->gc_ctx)
verflags |= EXPORT_CONTEXT_FLAG_MECH_CTX;
kret = krb5_store_uint8(sp, verflags);
if (kret) {
*minor_status = kret;
goto failure;
}
if (ctx->gc_target_len) {
_gss_mg_log(10, "gss-esc: exporting partial token %zu/%zu",
ctx->gc_input.length, ctx->gc_target_len);
kret = krb5_store_uint8(sp, ctx->gc_initial);
if (kret) {
*minor_status = kret;
goto failure;
}
kret = krb5_store_uint32(sp, ctx->gc_target_len);
if (kret) {
*minor_status = kret;
goto failure;
}
major_status = _gss_mg_store_buffer(minor_status, sp,
&ctx->gc_input);
if (major_status != GSS_S_COMPLETE)
goto failure;
} else if (ctx->gc_ctx == GSS_C_NO_CONTEXT) {
gss_delete_sec_context(&tmp_minor, context_handle,
GSS_C_NO_BUFFER);
return GSS_S_NO_CONTEXT;
}
if (ctx->gc_ctx) {
m = ctx->gc_mech;
major_status = m->gm_export_sec_context(minor_status,
&ctx->gc_ctx, &buf);
if (major_status != GSS_S_COMPLETE) {
_gss_mg_error(m, *minor_status);
goto failure;
}
major_status = _gss_mg_store_oid(minor_status, sp,
&m->gm_mech_oid);
if (major_status != GSS_S_COMPLETE)
goto failure;
major_status = _gss_mg_store_buffer(minor_status, sp, &buf);
if (major_status != GSS_S_COMPLETE)
goto failure;
}
kret = krb5_storage_to_data(sp, &data);
if (kret) {
*minor_status = kret;
goto failure;
}
interprocess_token->length = data.length;
interprocess_token->value = data.data;
major_status = GSS_S_COMPLETE;
_gss_mg_log(1, "gss-esc: token length %zu", data.length);
failure:
if (major_status == GSS_S_COMPLETE && *minor_status == 0)
gss_delete_sec_context(&tmp_minor, context_handle,
GSS_C_NO_BUFFER);
else if (*minor_status)
major_status = GSS_S_FAILURE;
_gss_secure_release_buffer(minor_status, &buf);
krb5_storage_free(sp);
return major_status;
}
|
