1 // SPDX-License-Identifier: GPL-2.0
2
3 #include <linux/ceph/ceph_debug.h>
4
5 #include <linux/err.h>
6 #include <linux/module.h>
7 #include <linux/random.h>
8 #include <linux/slab.h>
9
10 #include <linux/ceph/decode.h>
11 #include <linux/ceph/auth.h>
12
13 #include "auth_none.h"
14
15 static void reset(struct ceph_auth_client *ac)
16 {
17 struct ceph_auth_none_info *xi = ac->private;
18
19 xi->starting = true;
20 }
21
22 static void destroy(struct ceph_auth_client *ac)
23 {
24 kfree(ac->private);
25 ac->private = NULL;
26 }
27
28 static int is_authenticated(struct ceph_auth_client *ac)
29 {
30 struct ceph_auth_none_info *xi = ac->private;
31
32 return !xi->starting;
33 }
34
35 static int should_authenticate(struct ceph_auth_client *ac)
36 {
37 struct ceph_auth_none_info *xi = ac->private;
38
39 return xi->starting;
40 }
41
42 static int ceph_auth_none_build_authorizer(struct ceph_auth_client *ac,
43 struct ceph_none_authorizer *au)
44 {
45 void *p = au->buf;
46 void *const end = p + sizeof(au->buf);
47 int ret;
48
49 ceph_encode_8_safe(&p, end, 1, e_range);
50 ret = ceph_auth_entity_name_encode(ac->name, &p, end);
51 if (ret < 0)
52 return ret;
53
54 ceph_encode_64_safe(&p, end, ac->global_id, e_range);
55 au->buf_len = p - (void *)au->buf;
56 dout("%s built authorizer len %d\n", __func__, au->buf_len);
57 return 0;
58
59 e_range:
60 return -ERANGE;
61 }
62
63 static int build_request(struct ceph_auth_client *ac, void *buf, void *end)
64 {
65 return 0;
66 }
67
68 /*
69 * the generic auth code decode the global_id, and we carry no actual
70 * authenticate state, so nothing happens here.
71 */
72 static int handle_reply(struct ceph_auth_client *ac, u64 global_id,
73 void *buf, void *end, u8 *session_key,
74 int *session_key_len, u8 *con_secret,
75 int *con_secret_len)
76 {
77 struct ceph_auth_none_info *xi = ac->private;
78
79 xi->starting = false;
80 ceph_auth_set_global_id(ac, global_id);
81 return 0;
82 }
83
84 static void ceph_auth_none_destroy_authorizer(struct ceph_authorizer *a)
85 {
86 kfree(a);
87 }
88
89 /*
90 * build an 'authorizer' with our entity_name and global_id. it is
91 * identical for all services we connect to.
92 */
93 static int ceph_auth_none_create_authorizer(
94 struct ceph_auth_client *ac, int peer_type,
95 struct ceph_auth_handshake *auth)
96 {
97 struct ceph_none_authorizer *au;
98 int ret;
99
100 au = kmalloc(sizeof(*au), GFP_NOFS);
101 if (!au)
102 return -ENOMEM;
103
104 au->base.destroy = ceph_auth_none_destroy_authorizer;
105
106 ret = ceph_auth_none_build_authorizer(ac, au);
107 if (ret) {
108 kfree(au);
109 return ret;
110 }
111
112 auth->authorizer = (struct ceph_authorizer *) au;
113 auth->authorizer_buf = au->buf;
114 auth->authorizer_buf_len = au->buf_len;
115 auth->authorizer_reply_buf = NULL;
116 auth->authorizer_reply_buf_len = 0;
117
118 return 0;
119 }
120
121 static const struct ceph_auth_client_ops ceph_auth_none_ops = {
122 .reset = reset,
123 .destroy = destroy,
124 .is_authenticated = is_authenticated,
125 .should_authenticate = should_authenticate,
126 .build_request = build_request,
127 .handle_reply = handle_reply,
128 .create_authorizer = ceph_auth_none_create_authorizer,
129 };
130
131 int ceph_auth_none_init(struct ceph_auth_client *ac)
132 {
133 struct ceph_auth_none_info *xi;
134
135 dout("ceph_auth_none_init %p\n", ac);
136 xi = kzalloc(sizeof(*xi), GFP_NOFS);
137 if (!xi)
138 return -ENOMEM;
139
140 xi->starting = true;
141
142 ac->protocol = CEPH_AUTH_NONE;
143 ac->private = xi;
144 ac->ops = &ceph_auth_none_ops;
145 return 0;
146 }
147
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