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
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
|
/*
* Copyright (c) 2011, PADL Software Pty Ltd.
* 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.
*
* 3. Neither the name of PADL Software nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY PADL SOFTWARE 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 PADL SOFTWARE 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 "mech_locl.h"
gss_buffer_desc GSSAPI_LIB_VARIABLE __gss_c_attr_local_login_user = {
sizeof("local-login-user") - 1,
"local-login-user"
};
static OM_uint32
mech_authorize_localname(OM_uint32 *minor_status,
const struct _gss_name *name,
const struct _gss_name *user)
{
OM_uint32 major_status = GSS_S_NAME_NOT_MN;
struct _gss_mechanism_name *mn;
HEIM_SLIST_FOREACH(mn, &name->gn_mn, gmn_link) {
gssapi_mech_interface m = mn->gmn_mech;
if (m->gm_authorize_localname == NULL) {
major_status = GSS_S_UNAVAILABLE;
continue;
}
major_status = m->gm_authorize_localname(minor_status,
mn->gmn_name,
&user->gn_value,
&user->gn_type);
if (major_status != GSS_S_UNAUTHORIZED)
break;
}
return major_status;
}
/*
* Naming extensions based local login authorization.
*/
static OM_uint32
attr_authorize_localname(OM_uint32 *minor_status,
const struct _gss_name *name,
const struct _gss_name *user)
{
OM_uint32 major_status = GSS_S_UNAVAILABLE;
int more = -1;
if (!gss_oid_equal(&user->gn_type, GSS_C_NT_USER_NAME))
return GSS_S_BAD_NAMETYPE;
while (more != 0 && major_status != GSS_S_COMPLETE) {
OM_uint32 tmpMajor, tmpMinor;
gss_buffer_desc value;
gss_buffer_desc display_value;
int authenticated = 0, complete = 0;
tmpMajor = gss_get_name_attribute(minor_status,
(gss_name_t)name,
GSS_C_ATTR_LOCAL_LOGIN_USER,
&authenticated,
&complete,
&value,
&display_value,
&more);
if (GSS_ERROR(tmpMajor)) {
major_status = tmpMajor;
break;
}
/* If attribute is present, return an authoritative error code. */
if (authenticated &&
value.length == user->gn_value.length &&
memcmp(value.value, user->gn_value.value, user->gn_value.length) == 0)
major_status = GSS_S_COMPLETE;
else
major_status = GSS_S_UNAUTHORIZED;
gss_release_buffer(&tmpMinor, &value);
gss_release_buffer(&tmpMinor, &display_value);
}
return major_status;
}
GSSAPI_LIB_FUNCTION OM_uint32 GSSAPI_LIB_CALL
gss_authorize_localname(OM_uint32 *minor_status,
gss_const_name_t gss_name,
gss_const_name_t gss_user)
{
OM_uint32 major_status;
const struct _gss_name *name = (const struct _gss_name *) gss_name;
const struct _gss_name *user = (const struct _gss_name *) gss_user;
int mechAvailable = 0;
*minor_status = 0;
if (gss_name == GSS_C_NO_NAME || gss_user == GSS_C_NO_NAME)
return GSS_S_CALL_INACCESSIBLE_READ;
/*
* We should check that the user name is not a mechanism name, but
* as Heimdal always calls the mechanism's gss_import_name(), it's
* not possible to make this check.
*/
#if 0
if (HEIM_SLIST_FIRST(&user->gn_mn) != NULL)
return GSS_S_BAD_NAME;
#endif
/* If mech returns yes, we return yes */
major_status = mech_authorize_localname(minor_status, name, user);
if (major_status == GSS_S_COMPLETE)
return GSS_S_COMPLETE;
else if (major_status != GSS_S_UNAVAILABLE)
mechAvailable = 1;
/* If attribute exists, it is authoritative */
major_status = attr_authorize_localname(minor_status, name, user);
if (major_status == GSS_S_COMPLETE || major_status == GSS_S_UNAUTHORIZED)
return major_status;
/* If mechanism did not implement SPI, compare the local name */
if (mechAvailable == 0) {
int match = 0;
major_status = gss_compare_name(minor_status, gss_name,
gss_user, &match);
if (major_status == GSS_S_COMPLETE && match == 0)
major_status = GSS_S_UNAUTHORIZED;
}
return major_status;
}
GSSAPI_LIB_FUNCTION int GSSAPI_LIB_CALL
gss_userok(gss_const_name_t name,
const char *user)
{
OM_uint32 major_status, minor_status;
gss_buffer_desc userBuf;
gss_name_t userName;
userBuf.value = (void *)user;
userBuf.length = strlen(user);
major_status = gss_import_name(&minor_status, &userBuf,
GSS_C_NT_USER_NAME, &userName);
if (GSS_ERROR(major_status))
return 0;
major_status = gss_authorize_localname(&minor_status, name, userName);
gss_release_name(&minor_status, &userName);
return (major_status == GSS_S_COMPLETE);
}
|
