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Current Path : /lib/modules/3.10.0-1160.92.1.el7.x86_64/source/include/linux/ceph/
Linux 43-225-53-84.webhostbox.net 3.10.0-1160.92.1.el7.x86_64 #1 SMP Tue Jun 20 11:48:01 UTC 2023 x86_64
Current File : //lib/modules/3.10.0-1160.92.1.el7.x86_64/source/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 (*add_authorizer_challenge)(struct ceph_auth_client *ac,
					struct ceph_authorizer *a,
					void *challenge_buf,
					int challenge_buf_len);
	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);
int ceph_auth_add_authorizer_challenge(struct ceph_auth_client *ac,
				       struct ceph_authorizer *a,
				       void *challenge_buf,
				       int challenge_buf_len);
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;
}

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
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