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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
/*
* Copyright (c) 2019-2020, AuriStor, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - 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 COPYRIGHT HOLDERS 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
* COPYRIGHT HOLDER 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.
*
*/
#include "sanon_locl.h"
static int
is_anonymous_identity_p(gss_buffer_t name_string, gss_OID name_type)
{
if (gss_oid_equal(name_type, GSS_C_NT_ANONYMOUS))
return TRUE;
else if ((name_type == GSS_C_NO_OID ||
gss_oid_equal(name_type, GSS_C_NT_USER_NAME) ||
gss_oid_equal(name_type, GSS_KRB5_NT_PRINCIPAL_NAME)) &&
buffer_equal_p(name_string, _gss_sanon_wellknown_user_name))
return TRUE;
else if (gss_oid_equal(name_type, GSS_C_NT_HOSTBASED_SERVICE) &&
buffer_equal_p(name_string, _gss_sanon_wellknown_service_name))
return TRUE;
return FALSE;
}
static krb5_error_code
storage_ret_der_oid(krb5_storage *sp, gss_OID_desc *oid)
{
krb5_error_code ret;
uint16_t der_oid_len;
uint8_t oid_len, tag;
oid->length = 0;
oid->elements = NULL;
ret = krb5_ret_uint16(sp, &der_oid_len);
if (ret == 0)
ret = krb5_ret_uint8(sp, &tag);
if (ret == 0)
ret = krb5_ret_uint8(sp, &oid_len);
if (ret)
return ret;
if (tag != 0x06)
return EINVAL;
if (der_oid_len != 2 + oid_len)
return EINVAL;
oid->elements = malloc(oid_len);
if (oid->elements == NULL)
return ENOMEM;
if (krb5_storage_read(sp, oid->elements, oid_len) != oid_len) {
free(oid->elements);
oid->elements = NULL;
oid->length = 0;
return EINVAL;
}
oid->length = oid_len;
return 0;
}
static OM_uint32
import_export_name(OM_uint32 *minor,
const gss_buffer_t input_name_buffer,
gss_name_t *output_name)
{
OM_uint32 major;
krb5_error_code ret;
krb5_storage *sp;
uint32_t name_len = 0;
uint16_t tok_id;
gss_OID_desc oid_buf = { 0, NULL };
uint8_t is_anonymous;
sp = krb5_storage_from_readonly_mem(input_name_buffer->value,
input_name_buffer->length);
if (sp == NULL) {
*minor = ENOMEM;
return GSS_S_FAILURE;
}
krb5_storage_set_byteorder(sp, KRB5_STORAGE_BYTEORDER_BE);
major = GSS_S_BAD_NAME;
*minor = 0;
ret = krb5_ret_uint16(sp, &tok_id);
if (ret == 0 && tok_id != 0x0401)
ret = EINVAL;
if (ret == 0)
ret = storage_ret_der_oid(sp, &oid_buf);
if (ret == 0) {
if (!gss_oid_equal(&oid_buf, GSS_SANON_X25519_MECHANISM))
ret = EINVAL;
free(oid_buf.elements);
}
if (ret == 0)
ret = krb5_ret_uint32(sp, &name_len);
if (ret == 0)
ret = krb5_ret_uint8(sp, &is_anonymous);
if (ret == 0) {
if (name_len != 1)
ret = EINVAL;
if (is_anonymous == 1) {
*output_name = _gss_sanon_anonymous_identity;
major = GSS_S_COMPLETE;
} else {
major = GSS_S_BAD_NAME;
}
}
krb5_storage_free(sp);
if (*minor == 0)
*minor = ret;
return major;
}
OM_uint32 GSSAPI_CALLCONV
_gss_sanon_import_name(OM_uint32 *minor,
const gss_buffer_t input_name_buffer,
const gss_OID input_name_type,
gss_name_t *output_name)
{
if (gss_oid_equal(input_name_type, GSS_C_NT_EXPORT_NAME))
return import_export_name(minor, input_name_buffer, output_name);
*minor = 0;
*output_name =
is_anonymous_identity_p(input_name_buffer, input_name_type) ?
_gss_sanon_anonymous_identity : _gss_sanon_non_anonymous_identity;
return GSS_S_COMPLETE;
}
|
