summaryrefslogtreecommitdiffstats
path: root/include/linux/ceph/auth.h
blob: 1563265d209740aadc845d28c1389091c5249728 (plain)
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
#ifndef _FS_CEPH_AUTH_H
#define _FS_CEPH_AUTH_H

#include <linux/ceph/types.h>
#include <linux/ceph/buffer.h>

/*
 * Abstract interface for communicating with the authenticate module.
 * There is some handshake that takes place between us and the monitor
 * to acquire the necessary keys.  These are used to generate an
 * 'authorizer' that we use when connecting to a service (mds, osd).
 */

struct ceph_auth_client;
struct ceph_msg;

struct ceph_authorizer {
	void (*destroy)(struct ceph_authorizer *);
};

struct ceph_auth_handshake {
	struct ceph_authorizer *authorizer;
	void *authorizer_buf;
	size_t authorizer_buf_len;
	void *authorizer_reply_buf;
	size_t authorizer_reply_buf_len;
	int (*sign_message)(struct ceph_auth_handshake *auth,
			    struct ceph_msg *msg);
	int (*check_message_signature)(struct ceph_auth_handshake *auth,
				       struct ceph_msg *msg);
};

struct ceph_auth_client_ops {
	const char *name;

	/*
	 * true if we are authenticated and can connect to
	 * services.
	 */
	int (*is_authenticated)(struct ceph_auth_client *ac);

	/*
	 * true if we should (re)authenticate, e.g., when our tickets
	 * are getting old and crusty.
	 */
	int (*should_authenticate)(struct ceph_auth_client *ac);

	/*
	 * build requests and process replies during monitor
	 * handshake.  if handle_reply returns -EAGAIN, we build
	 * another request.
	 */
	int (*build_request)(struct ceph_auth_client *ac, void *buf, void *end);
	int (*handle_reply)(struct ceph_auth_client *ac, int result,
			    void *buf, void *end);

	/*
	 * Create authorizer for connecting to a service, and verify
	 * the response to authenticate the service.
	 */
	int (*create_authorizer)(struct ceph_auth_client *ac, int peer_type,
				 struct ceph_auth_handshake *auth);
	/* ensure that an existing authorizer is up to date */
	int (*update_authorizer)(struct ceph_auth_client *ac, int peer_type,
				 struct ceph_auth_handshake *auth);
	int (*verify_authorizer_reply)(struct ceph_auth_client *ac,
				       struct ceph_authorizer *a, size_t len);
	void (*invalidate_authorizer)(struct ceph_auth_client *ac,
				      int peer_type);

	/* reset when we (re)connect to a monitor */
	void (*reset)(struct ceph_auth_client *ac);

	void (*destroy)(struct ceph_auth_client *ac);

	int (*sign_message)(struct ceph_auth_handshake *auth,
			    struct ceph_msg *msg);
	int (*check_message_signature)(struct ceph_auth_handshake *auth,
				       struct ceph_msg *msg);
};

struct ceph_auth_client {
	u32 protocol;           /* CEPH_AUTH_* */
	void *private;          /* for use by protocol implementation */
	const struct ceph_auth_client_ops *ops;  /* null iff protocol==0 */

	bool negotiating;       /* true if negotiating protocol */
	const char *name;       /* entity name */
	u64 global_id;          /* our unique id in system */
	const struct ceph_crypto_key *key;     /* our secret key */
	unsigned want_keys;     /* which services we want */

	struct mutex mutex;
};

extern struct ceph_auth_client *ceph_auth_init(const char *name,
					       const struct ceph_crypto_key *key);
extern void ceph_auth_destroy(struct ceph_auth_client *ac);

extern void ceph_auth_reset(struct ceph_auth_client *ac);

extern int ceph_auth_build_hello(struct ceph_auth_client *ac,
				 void *buf, size_t len);
extern int ceph_handle_auth_reply(struct ceph_auth_client *ac,
				  void *buf, size_t len,
				  void *reply_buf, size_t reply_len);
extern int ceph_entity_name_encode(const char *name, void **p, void *end);

extern int ceph_build_auth(struct ceph_auth_client *ac,
		    void *msg_buf, size_t msg_len);

extern int ceph_auth_is_authenticated(struct ceph_auth_client *ac);
extern int ceph_auth_create_authorizer(struct ceph_auth_client *ac,
				       int peer_type,
				       struct ceph_auth_handshake *auth);
void ceph_auth_destroy_authorizer(struct ceph_authorizer *a);
extern int ceph_auth_update_authorizer(struct ceph_auth_client *ac,
				       int peer_type,
				       struct ceph_auth_handshake *a);
extern int ceph_auth_verify_authorizer_reply(struct ceph_auth_client *ac,
					     struct ceph_authorizer *a,
					     size_t len);
extern void ceph_auth_invalidate_authorizer(struct ceph_auth_client *ac,
					    int peer_type);

static inline int ceph_auth_sign_message(struct ceph_auth_handshake *auth,
					 struct ceph_msg *msg)
{
	if (auth->sign_message)
		return auth->sign_message(auth, msg);
	return 0;
}

static inline
int ceph_auth_check_message_signature(struct ceph_auth_handshake *auth,
				      struct ceph_msg *msg)
{
	if (auth->check_message_signature)
		return auth->check_message_signature(auth, msg);
	return 0;
}
#endif
OpenPOWER on IntegriCloud