Release 4.12 include/linux/ceph/auth.h

#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);
	
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);
int ceph_auth_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);
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;
}

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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;
}
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#endif
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Directory: include/linux/ceph

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