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Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001// SPDX-License-Identifier: GPL-2.0
Sage Weil4e7a5dc2009-11-18 16:19:57 -08002
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -07003#include <linux/ceph/ceph_debug.h>
Sage Weil4e7a5dc2009-11-18 16:19:57 -08004
5#include <linux/err.h>
6#include <linux/module.h>
7#include <linux/random.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +09008#include <linux/slab.h>
Sage Weil4e7a5dc2009-11-18 16:19:57 -08009
Yehuda Sadeh3d14c5d2010-04-06 15:14:15 -070010#include <linux/ceph/decode.h>
11#include <linux/ceph/auth.h>
12
Sage Weil4e7a5dc2009-11-18 16:19:57 -080013#include "auth_none.h"
Sage Weil4e7a5dc2009-11-18 16:19:57 -080014
15static void reset(struct ceph_auth_client *ac)
16{
17 struct ceph_auth_none_info *xi = ac->private;
18
19 xi->starting = true;
Sage Weil4e7a5dc2009-11-18 16:19:57 -080020}
21
22static void destroy(struct ceph_auth_client *ac)
23{
24 kfree(ac->private);
25 ac->private = NULL;
26}
27
28static 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
Sage Weila41359f2010-05-25 15:39:06 -070035static 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
Ilya Dryomov6c1ea262016-04-11 19:34:49 +020042static 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);
Ilya Dryomovf01d5cb2016-06-02 16:45:08 +020050 ret = ceph_auth_entity_name_encode(ac->name, &p, end);
Ilya Dryomov6c1ea262016-04-11 19:34:49 +020051 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
59e_range:
60 return -ERANGE;
61}
62
Tyler Hicks2cb33ca2013-06-20 13:13:59 -070063static int build_request(struct ceph_auth_client *ac, void *buf, void *end)
64{
65 return 0;
66}
67
Sage Weil4e7a5dc2009-11-18 16:19:57 -080068/*
69 * the generic auth code decode the global_id, and we carry no actual
70 * authenticate state, so nothing happens here.
71 */
Ilya Dryomov03af4c72021-06-21 12:17:40 +020072static int handle_reply(struct ceph_auth_client *ac, u64 global_id,
Ilya Dryomov285ea34f2020-10-26 16:47:20 +010073 void *buf, void *end, u8 *session_key,
74 int *session_key_len, u8 *con_secret,
75 int *con_secret_len)
Sage Weil4e7a5dc2009-11-18 16:19:57 -080076{
77 struct ceph_auth_none_info *xi = ac->private;
78
79 xi->starting = false;
Ilya Dryomov03af4c72021-06-21 12:17:40 +020080 ceph_auth_set_global_id(ac, global_id);
Ilya Dryomov3c0d0892021-06-21 11:53:38 +020081 return 0;
Sage Weil4e7a5dc2009-11-18 16:19:57 -080082}
83
Ilya Dryomov6c1ea262016-04-11 19:34:49 +020084static void ceph_auth_none_destroy_authorizer(struct ceph_authorizer *a)
85{
86 kfree(a);
87}
88
Sage Weil4e7a5dc2009-11-18 16:19:57 -080089/*
Ilya Dryomov6c1ea262016-04-11 19:34:49 +020090 * build an 'authorizer' with our entity_name and global_id. it is
91 * identical for all services we connect to.
Sage Weil4e7a5dc2009-11-18 16:19:57 -080092 */
93static int ceph_auth_none_create_authorizer(
94 struct ceph_auth_client *ac, int peer_type,
Alex Elder74f18692012-05-16 15:16:39 -050095 struct ceph_auth_handshake *auth)
Sage Weil4e7a5dc2009-11-18 16:19:57 -080096{
Ilya Dryomov6c1ea262016-04-11 19:34:49 +020097 struct ceph_none_authorizer *au;
Sage Weil4e7a5dc2009-11-18 16:19:57 -080098 int ret;
99
Ilya Dryomov6c1ea262016-04-11 19:34:49 +0200100 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;
Sage Weil4e7a5dc2009-11-18 16:19:57 -0800110 }
111
Alex Elder74f18692012-05-16 15:16:39 -0500112 auth->authorizer = (struct ceph_authorizer *) au;
113 auth->authorizer_buf = au->buf;
114 auth->authorizer_buf_len = au->buf_len;
Ilya Dryomovd71a95e2021-05-15 12:04:39 +0200115 auth->authorizer_reply_buf = NULL;
116 auth->authorizer_reply_buf_len = 0;
Alex Elder74f18692012-05-16 15:16:39 -0500117
Sage Weil4e7a5dc2009-11-18 16:19:57 -0800118 return 0;
Sage Weil4e7a5dc2009-11-18 16:19:57 -0800119}
120
121static const struct ceph_auth_client_ops ceph_auth_none_ops = {
Sage Weil4e7a5dc2009-11-18 16:19:57 -0800122 .reset = reset,
123 .destroy = destroy,
124 .is_authenticated = is_authenticated,
Sage Weila41359f2010-05-25 15:39:06 -0700125 .should_authenticate = should_authenticate,
Tyler Hicks2cb33ca2013-06-20 13:13:59 -0700126 .build_request = build_request,
Sage Weil4e7a5dc2009-11-18 16:19:57 -0800127 .handle_reply = handle_reply,
128 .create_authorizer = ceph_auth_none_create_authorizer,
Sage Weil4e7a5dc2009-11-18 16:19:57 -0800129};
130
131int 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;
Sage Weil4e7a5dc2009-11-18 16:19:57 -0800141
142 ac->protocol = CEPH_AUTH_NONE;
143 ac->private = xi;
144 ac->ops = &ceph_auth_none_ops;
145 return 0;
146}