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142 lines
4.5 KiB
142 lines
4.5 KiB
#ifndef _FS_CEPH_AUTH_H |
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#define _FS_CEPH_AUTH_H |
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#include <linux/ceph/types.h> |
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#include <linux/ceph/buffer.h> |
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/* |
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* Abstract interface for communicating with the authenticate module. |
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* There is some handshake that takes place between us and the monitor |
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* to acquire the necessary keys. These are used to generate an |
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* 'authorizer' that we use when connecting to a service (mds, osd). |
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*/ |
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struct ceph_auth_client; |
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struct ceph_msg; |
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struct ceph_authorizer { |
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void (*destroy)(struct ceph_authorizer *); |
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}; |
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struct ceph_auth_handshake { |
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struct ceph_authorizer *authorizer; |
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void *authorizer_buf; |
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size_t authorizer_buf_len; |
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void *authorizer_reply_buf; |
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size_t authorizer_reply_buf_len; |
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int (*sign_message)(struct ceph_auth_handshake *auth, |
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struct ceph_msg *msg); |
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int (*check_message_signature)(struct ceph_auth_handshake *auth, |
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struct ceph_msg *msg); |
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}; |
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struct ceph_auth_client_ops { |
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const char *name; |
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/* |
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* true if we are authenticated and can connect to |
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* services. |
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*/ |
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int (*is_authenticated)(struct ceph_auth_client *ac); |
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/* |
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* true if we should (re)authenticate, e.g., when our tickets |
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* are getting old and crusty. |
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*/ |
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int (*should_authenticate)(struct ceph_auth_client *ac); |
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/* |
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* build requests and process replies during monitor |
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* handshake. if handle_reply returns -EAGAIN, we build |
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* another request. |
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*/ |
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int (*build_request)(struct ceph_auth_client *ac, void *buf, void *end); |
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int (*handle_reply)(struct ceph_auth_client *ac, int result, |
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void *buf, void *end); |
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/* |
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* Create authorizer for connecting to a service, and verify |
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* the response to authenticate the service. |
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*/ |
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int (*create_authorizer)(struct ceph_auth_client *ac, int peer_type, |
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struct ceph_auth_handshake *auth); |
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/* ensure that an existing authorizer is up to date */ |
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int (*update_authorizer)(struct ceph_auth_client *ac, int peer_type, |
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struct ceph_auth_handshake *auth); |
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int (*verify_authorizer_reply)(struct ceph_auth_client *ac, |
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struct ceph_authorizer *a, size_t len); |
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void (*invalidate_authorizer)(struct ceph_auth_client *ac, |
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int peer_type); |
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/* reset when we (re)connect to a monitor */ |
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void (*reset)(struct ceph_auth_client *ac); |
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void (*destroy)(struct ceph_auth_client *ac); |
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int (*sign_message)(struct ceph_auth_handshake *auth, |
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struct ceph_msg *msg); |
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int (*check_message_signature)(struct ceph_auth_handshake *auth, |
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struct ceph_msg *msg); |
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}; |
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struct ceph_auth_client { |
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u32 protocol; /* CEPH_AUTH_* */ |
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void *private; /* for use by protocol implementation */ |
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const struct ceph_auth_client_ops *ops; /* null iff protocol==0 */ |
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bool negotiating; /* true if negotiating protocol */ |
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const char *name; /* entity name */ |
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u64 global_id; /* our unique id in system */ |
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const struct ceph_crypto_key *key; /* our secret key */ |
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unsigned want_keys; /* which services we want */ |
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struct mutex mutex; |
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}; |
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extern struct ceph_auth_client *ceph_auth_init(const char *name, |
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const struct ceph_crypto_key *key); |
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extern void ceph_auth_destroy(struct ceph_auth_client *ac); |
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extern void ceph_auth_reset(struct ceph_auth_client *ac); |
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extern int ceph_auth_build_hello(struct ceph_auth_client *ac, |
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void *buf, size_t len); |
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extern int ceph_handle_auth_reply(struct ceph_auth_client *ac, |
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void *buf, size_t len, |
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void *reply_buf, size_t reply_len); |
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int ceph_auth_entity_name_encode(const char *name, void **p, void *end); |
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extern int ceph_build_auth(struct ceph_auth_client *ac, |
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void *msg_buf, size_t msg_len); |
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extern int ceph_auth_is_authenticated(struct ceph_auth_client *ac); |
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extern int ceph_auth_create_authorizer(struct ceph_auth_client *ac, |
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int peer_type, |
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struct ceph_auth_handshake *auth); |
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void ceph_auth_destroy_authorizer(struct ceph_authorizer *a); |
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extern int ceph_auth_update_authorizer(struct ceph_auth_client *ac, |
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int peer_type, |
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struct ceph_auth_handshake *a); |
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extern int ceph_auth_verify_authorizer_reply(struct ceph_auth_client *ac, |
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struct ceph_authorizer *a, |
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size_t len); |
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extern void ceph_auth_invalidate_authorizer(struct ceph_auth_client *ac, |
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int peer_type); |
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static inline int ceph_auth_sign_message(struct ceph_auth_handshake *auth, |
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struct ceph_msg *msg) |
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{ |
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if (auth->sign_message) |
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return auth->sign_message(auth, msg); |
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return 0; |
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} |
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static inline |
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int ceph_auth_check_message_signature(struct ceph_auth_handshake *auth, |
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struct ceph_msg *msg) |
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{ |
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if (auth->check_message_signature) |
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return auth->check_message_signature(auth, msg); |
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return 0; |
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} |
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#endif
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