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
|
/*
SSSD
Kerberos 5 Backend Module
Authors:
Sumit Bose <sbose@redhat.com>
Copyright (C) 2009 Red Hat
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/stat.h>
#include "util/child_common.h"
#include "providers/krb5/krb5_auth.h"
#include "providers/krb5/krb5_common.h"
#include "providers/krb5/krb5_init_shared.h"
struct krb5_options {
struct dp_option *opts;
struct krb5_ctx *auth_ctx;
};
struct krb5_options *krb5_options = NULL;
struct bet_ops krb5_auth_ops = {
.handler = krb5_pam_handler,
.finalize = NULL,
};
int krb5_ctx_re_destructor(void *memctx)
{
struct krb5_ctx *ctx = (struct krb5_ctx *) memctx;
if (ctx->illegal_path_re) {
pcre_free(ctx->illegal_path_re);
ctx->illegal_path_re = NULL;
}
return 0;
}
int sssm_krb5_auth_init(struct be_ctx *bectx,
struct bet_ops **ops,
void **pvt_auth_data)
{
struct krb5_ctx *ctx = NULL;
int ret;
const char *krb5_servers;
const char *krb5_backup_servers;
const char *krb5_kpasswd_servers;
const char *krb5_backup_kpasswd_servers;
const char *krb5_realm;
const char *errstr;
int errval;
int errpos;
if (krb5_options == NULL) {
krb5_options = talloc_zero(bectx, struct krb5_options);
if (krb5_options == NULL) {
DEBUG(1, ("talloc_zero failed.\n"));
return ENOMEM;
}
ret = krb5_get_options(krb5_options, bectx->cdb, bectx->conf_path,
&krb5_options->opts);
if (ret != EOK) {
DEBUG(1, ("krb5_get_options failed.\n"));
return ret;
}
}
if (krb5_options->auth_ctx != NULL) {
*ops = &krb5_auth_ops;
*pvt_auth_data = krb5_options->auth_ctx;
return EOK;
}
ctx = talloc_zero(bectx, struct krb5_ctx);
if (!ctx) {
DEBUG(1, ("talloc failed.\n"));
return ENOMEM;
}
krb5_options->auth_ctx = ctx;
ctx->action = INIT_PW;
ctx->opts = krb5_options->opts;
krb5_servers = dp_opt_get_string(ctx->opts, KRB5_KDC);
krb5_backup_servers = dp_opt_get_string(ctx->opts, KRB5_BACKUP_KDC);
krb5_realm = dp_opt_get_string(ctx->opts, KRB5_REALM);
if (krb5_realm == NULL) {
DEBUG(0, ("Missing krb5_realm option!\n"));
return EINVAL;
}
ret = krb5_service_init(ctx, bectx,
SSS_KRB5KDC_FO_SRV, krb5_servers,
krb5_backup_servers, krb5_realm,
dp_opt_get_bool(krb5_options->opts,
KRB5_USE_KDCINFO),
&ctx->service);
if (ret != EOK) {
DEBUG(0, ("Failed to init KRB5 failover service!\n"));
return ret;
}
krb5_kpasswd_servers = dp_opt_get_string(ctx->opts, KRB5_KPASSWD);
krb5_backup_kpasswd_servers = dp_opt_get_string(ctx->opts,
KRB5_BACKUP_KPASSWD);
if (krb5_kpasswd_servers == NULL && krb5_backup_kpasswd_servers != NULL) {
DEBUG(SSSDBG_CONF_SETTINGS, ("kpasswd server wasn't specified but "
"backup kpasswd given. Using it as primary\n"));
krb5_kpasswd_servers = krb5_backup_kpasswd_servers;
krb5_backup_kpasswd_servers = NULL;
}
if (krb5_kpasswd_servers == NULL && krb5_servers != NULL) {
DEBUG(0, ("Missing krb5_kpasswd option and KDC set explicitly, "
"will use KDC for pasword change operations!\n"));
ctx->kpasswd_service = NULL;
} else {
ret = krb5_service_init(ctx, bectx,
SSS_KRB5KPASSWD_FO_SRV, krb5_kpasswd_servers,
krb5_backup_kpasswd_servers, krb5_realm,
dp_opt_get_bool(krb5_options->opts,
KRB5_USE_KDCINFO),
&ctx->kpasswd_service);
if (ret != EOK) {
DEBUG(0, ("Failed to init KRB5KPASSWD failover service!\n"));
return ret;
}
}
/* Initialize features needed by the krb5_child */
ret = krb5_child_init(ctx, bectx);
if (ret != EOK) {
DEBUG(SSSDBG_FATAL_FAILURE,
("Could not initialize krb5_child settings: [%s]\n",
strerror(ret)));
goto fail;
}
ctx->illegal_path_re = pcre_compile2(ILLEGAL_PATH_PATTERN, 0,
&errval, &errstr, &errpos, NULL);
if (ctx->illegal_path_re == NULL) {
DEBUG(1, ("Invalid Regular Expression pattern at position %d. "
"(Error: %d [%s])\n", errpos, errval, errstr));
ret = EFAULT;
goto fail;
}
talloc_set_destructor((TALLOC_CTX *) ctx, krb5_ctx_re_destructor);
*ops = &krb5_auth_ops;
*pvt_auth_data = ctx;
return EOK;
fail:
talloc_zfree(krb5_options->auth_ctx);
return ret;
}
int sssm_krb5_chpass_init(struct be_ctx *bectx,
struct bet_ops **ops,
void **pvt_auth_data)
{
return sssm_krb5_auth_init(bectx, ops, pvt_auth_data);
}
int sssm_krb5_access_init(struct be_ctx *bectx,
struct bet_ops **ops,
void **pvt_auth_data)
{
return sssm_krb5_auth_init(bectx, ops, pvt_auth_data);
}
|
