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
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
#include <string.h>
#include <krb5_locl.h>
#include <hdb.h>
#include <hx509.h>
#include <kdc.h>
#include <kdc-plugin.h>
static krb5_error_code KRB5_CALLCONV
init(krb5_context context, void **ctx)
{
krb5_warnx(context, "kdc plugin init");
*ctx = NULL;
return 0;
}
static void KRB5_CALLCONV
fini(void *ctx)
{
}
static krb5_error_code KRB5_CALLCONV
pac_generate(void *ctx,
astgs_request_t r,
hdb_entry *client,
hdb_entry *server,
const krb5_keyblock *pk_replykey,
uint64_t pac_attributes,
krb5_pac *pac)
{
krb5_context context = kdc_request_get_context((kdc_request_t)r);
krb5_error_code ret;
krb5_data data;
if ((pac_attributes & (KRB5_PAC_WAS_REQUESTED |
KRB5_PAC_WAS_GIVEN_IMPLICITLY)) == 0) {
*pac = NULL;
return 0;
}
krb5_warnx(context, "pac generate");
data.data = "\x00\x01";
data.length = 2;
ret = krb5_pac_init(context, pac);
if (ret)
return ret;
ret = krb5_pac_add_buffer(context, *pac, 1, &data);
if (ret)
return ret;
return 0;
}
static krb5_error_code KRB5_CALLCONV
pac_verify(void *ctx,
astgs_request_t r,
krb5_const_principal new_ticket_client,
hdb_entry * delegation_proxy,
hdb_entry * client,
hdb_entry * server,
hdb_entry * krbtgt,
EncTicketPart *ticket,
krb5_pac pac)
{
krb5_context context = kdc_request_get_context((kdc_request_t)r);
krb5_error_code ret;
krb5_data data;
krb5_cksumtype cstype;
uint16_t rodc_id;
krb5_enctype etype;
Key *key;
krb5_warnx(context, "pac_verify");
ret = krb5_pac_get_buffer(context, pac, 1, &data);
if (ret)
return ret;
krb5_data_free(&data);
ret = krb5_pac_get_kdc_checksum_info(context, pac, &cstype, &rodc_id);
if (ret)
return ret;
if (rodc_id == 0 || rodc_id != krbtgt->kvno >> 16) {
krb5_warnx(context, "Wrong RODCIdentifier");
return EINVAL;
}
ret = krb5_cksumtype_to_enctype(context, cstype, &etype);
if (ret)
return ret;
ret = hdb_enctype2key(context, krbtgt, NULL, etype, &key);
if (ret)
return ret;
return krb5_pac_verify(context, pac, 0, NULL, NULL, &key->key);
}
static void logit(const char *what, astgs_request_t r)
{
krb5_context context = kdc_request_get_context((kdc_request_t)r);
const char *cname = kdc_request_get_cname((kdc_request_t)r);
const char *sname = kdc_request_get_sname((kdc_request_t)r);
krb5_warnx(context, "%s: client %s server %s",
what,
cname ? cname : "<unknown>",
sname ? sname : "<unknown>");
}
static krb5_error_code KRB5_CALLCONV
client_access(void *ctx, astgs_request_t r)
{
logit("client_access", r);
return 0;
}
static krb5_error_code KRB5_CALLCONV
finalize_reply(void *ctx, astgs_request_t r)
{
heim_number_t n;
krb5_error_code ret;
logit("finalize_reply", r);
n = heim_number_create(1234);
if (n == NULL)
return ENOMEM;
ret = kdc_request_set_attribute((kdc_request_t)r,
HSTR("org.h5l.tests.kdc-plugin"), n);
heim_release(n);
return ret;
}
static krb5_error_code KRB5_CALLCONV
audit(void *ctx, astgs_request_t r)
{
krb5_error_code ret = kdc_request_get_error_code((kdc_request_t)r);
heim_number_t n;
logit("audit", r);
if (ret)
return 0; /* finalize_reply only called in success */
n = kdc_request_get_attribute((kdc_request_t)r,
HSTR("org.h5l.tests.kdc-plugin"));
heim_assert(n && heim_number_get_int(n) == 1234,
"attribute not passed from finalize_reply");
if (n == NULL || heim_number_get_int(n) != 1234)
return EINVAL; /* return value is ignored, but for completeness */
return 0;
}
static krb5plugin_kdc_ftable kdc_plugin = {
KRB5_PLUGIN_KDC_VERSION_11,
init,
fini,
pac_generate,
pac_verify,
NULL, /* pac_update */
client_access,
NULL, /* referral_policy */
finalize_reply,
audit
};
static const krb5plugin_kdc_ftable *const kdc_plugins[] = {
&kdc_plugin
};
krb5_error_code KRB5_CALLCONV
kdc_plugin_load(krb5_context context,
krb5_get_instance_func_t *get_instance,
size_t *num_plugins,
const krb5plugin_kdc_ftable *const **plugins);
static uintptr_t KRB5_CALLCONV
kdc_plugin_get_instance(const char *libname)
{
if (strcmp(libname, "hdb") == 0)
return hdb_get_instance(libname);
else if (strcmp(libname, "krb5") == 0)
return krb5_get_instance(libname);
return 0;
}
krb5_error_code KRB5_CALLCONV
kdc_plugin_load(krb5_context context,
krb5_get_instance_func_t *get_instance,
size_t *num_plugins,
const krb5plugin_kdc_ftable *const **plugins)
{
*get_instance = kdc_plugin_get_instance;
*num_plugins = sizeof(kdc_plugins) / sizeof(kdc_plugins[0]);
*plugins = kdc_plugins;
return 0;
}
|
