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
reset(struct ceph_auth_client * ac)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
destroy(struct ceph_auth_client * ac)22 static void destroy(struct ceph_auth_client *ac)
23 {
24 kfree(ac->private);
25 ac->private = NULL;
26 }
27
is_authenticated(struct ceph_auth_client * ac)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
should_authenticate(struct ceph_auth_client * ac)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
ceph_auth_none_build_authorizer(struct ceph_auth_client * ac,struct ceph_none_authorizer * au)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
build_request(struct ceph_auth_client * ac,void * buf,void * end)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 */
handle_reply(struct ceph_auth_client * ac,int result,void * buf,void * end)72 static int handle_reply(struct ceph_auth_client *ac, int result,
73 void *buf, void *end)
74 {
75 struct ceph_auth_none_info *xi = ac->private;
76
77 xi->starting = false;
78 return result;
79 }
80
ceph_auth_none_destroy_authorizer(struct ceph_authorizer * a)81 static void ceph_auth_none_destroy_authorizer(struct ceph_authorizer *a)
82 {
83 kfree(a);
84 }
85
86 /*
87 * build an 'authorizer' with our entity_name and global_id. it is
88 * identical for all services we connect to.
89 */
ceph_auth_none_create_authorizer(struct ceph_auth_client * ac,int peer_type,struct ceph_auth_handshake * auth)90 static int ceph_auth_none_create_authorizer(
91 struct ceph_auth_client *ac, int peer_type,
92 struct ceph_auth_handshake *auth)
93 {
94 struct ceph_none_authorizer *au;
95 int ret;
96
97 au = kmalloc(sizeof(*au), GFP_NOFS);
98 if (!au)
99 return -ENOMEM;
100
101 au->base.destroy = ceph_auth_none_destroy_authorizer;
102
103 ret = ceph_auth_none_build_authorizer(ac, au);
104 if (ret) {
105 kfree(au);
106 return ret;
107 }
108
109 auth->authorizer = (struct ceph_authorizer *) au;
110 auth->authorizer_buf = au->buf;
111 auth->authorizer_buf_len = au->buf_len;
112 auth->authorizer_reply_buf = au->reply_buf;
113 auth->authorizer_reply_buf_len = sizeof (au->reply_buf);
114
115 return 0;
116 }
117
118 static const struct ceph_auth_client_ops ceph_auth_none_ops = {
119 .name = "none",
120 .reset = reset,
121 .destroy = destroy,
122 .is_authenticated = is_authenticated,
123 .should_authenticate = should_authenticate,
124 .build_request = build_request,
125 .handle_reply = handle_reply,
126 .create_authorizer = ceph_auth_none_create_authorizer,
127 };
128
ceph_auth_none_init(struct ceph_auth_client * ac)129 int ceph_auth_none_init(struct ceph_auth_client *ac)
130 {
131 struct ceph_auth_none_info *xi;
132
133 dout("ceph_auth_none_init %p\n", ac);
134 xi = kzalloc(sizeof(*xi), GFP_NOFS);
135 if (!xi)
136 return -ENOMEM;
137
138 xi->starting = true;
139
140 ac->protocol = CEPH_AUTH_NONE;
141 ac->private = xi;
142 ac->ops = &ceph_auth_none_ops;
143 return 0;
144 }
145