include/linux/ceph/auth.h

   1 #ifndef _FS_CEPH_AUTH_H
   2 #define _FS_CEPH_AUTH_H
   3
   4 #include <linux/ceph/types.h>
   5 #include <linux/ceph/buffer.h>
   6
   7 /*
   8  * Abstract interface for communicating with the authenticate module.
   9  * There is some handshake that takes place between us and the monitor
  10  * to acquire the necessary keys.  These are used to generate an
  11  * 'authorizer' that we use when connecting to a service (mds, osd).
  12  */
  13
  14 struct ceph_auth_client;
  15 struct ceph_authorizer;
  16
  17 struct ceph_auth_handshake {
  18         struct ceph_authorizer *authorizer;
  19         void *authorizer_buf;
  20         size_t authorizer_buf_len;
  21         void *authorizer_reply_buf;
  22         size_t authorizer_reply_buf_len;
  23 };
  24
  25 struct ceph_auth_client_ops {
  26         const char *name;
  27
  28         /*
  29          * true if we are authenticated and can connect to
  30          * services.
  31          */
  32         int (*is_authenticated)(struct ceph_auth_client *ac);
  33
  34         /*
  35          * true if we should (re)authenticate, e.g., when our tickets
  36          * are getting old and crusty.
  37          */
  38         int (*should_authenticate)(struct ceph_auth_client *ac);
  39
  40         /*
  41          * build requests and process replies during monitor
  42          * handshake.  if handle_reply returns -EAGAIN, we build
  43          * another request.
  44          */
  45         int (*build_request)(struct ceph_auth_client *ac, void *buf, void *end);
  46         int (*handle_reply)(struct ceph_auth_client *ac, int result,
  47                             void *buf, void *end);
  48
  49         /*
  50          * Create authorizer for connecting to a service, and verify
  51          * the response to authenticate the service.
  52          */
  53         int (*create_authorizer)(struct ceph_auth_client *ac, int peer_type,
  54                                  struct ceph_auth_handshake *auth);
  55         /* ensure that an existing authorizer is up to date */
  56         int (*update_authorizer)(struct ceph_auth_client *ac, int peer_type,
  57                                  struct ceph_auth_handshake *auth);
  58         int (*verify_authorizer_reply)(struct ceph_auth_client *ac,
  59                                        struct ceph_authorizer *a, size_t len);
  60         void (*destroy_authorizer)(struct ceph_auth_client *ac,
  61                                    struct ceph_authorizer *a);
  62         void (*invalidate_authorizer)(struct ceph_auth_client *ac,
  63                                       int peer_type);
  64
  65         /* reset when we (re)connect to a monitor */
  66         void (*reset)(struct ceph_auth_client *ac);
  67
  68         void (*destroy)(struct ceph_auth_client *ac);
  69 };
  70
  71 struct ceph_auth_client {
  72         u32 protocol;           /* CEPH_AUTH_* */
  73         void *private;          /* for use by protocol implementation */
  74         const struct ceph_auth_client_ops *ops;  /* null iff protocol==0 */
  75
  76         bool negotiating;       /* true if negotiating protocol */
  77         const char *name;       /* entity name */
  78         u64 global_id;          /* our unique id in system */
  79         const struct ceph_crypto_key *key;     /* our secret key */
  80         unsigned want_keys;     /* which services we want */
  81
  82         struct mutex mutex;
  83 };
  84
  85 extern struct ceph_auth_client *ceph_auth_init(const char *name,
  86                                                const struct ceph_crypto_key *key);
  87 extern void ceph_auth_destroy(struct ceph_auth_client *ac);
  88
  89 extern void ceph_auth_reset(struct ceph_auth_client *ac);
  90
  91 extern int ceph_auth_build_hello(struct ceph_auth_client *ac,
  92                                  void *buf, size_t len);
  93 extern int ceph_handle_auth_reply(struct ceph_auth_client *ac,
  94                                   void *buf, size_t len,
  95                                   void *reply_buf, size_t reply_len);
  96 extern int ceph_entity_name_encode(const char *name, void **p, void *end);
  97
  98 extern int ceph_build_auth(struct ceph_auth_client *ac,
  99                     void *msg_buf, size_t msg_len);
 100
 101 extern int ceph_auth_is_authenticated(struct ceph_auth_client *ac);
 102 extern int ceph_auth_create_authorizer(struct ceph_auth_client *ac,
 103                                        int peer_type,
 104                                        struct ceph_auth_handshake *auth);
 105 extern void ceph_auth_destroy_authorizer(struct ceph_auth_client *ac,
 106                                          struct ceph_authorizer *a);
 107 extern int ceph_auth_update_authorizer(struct ceph_auth_client *ac,
 108                                        int peer_type,
 109                                        struct ceph_auth_handshake *a);
 110 extern int ceph_auth_verify_authorizer_reply(struct ceph_auth_client *ac,
 111                                              struct ceph_authorizer *a,
 112                                              size_t len);
 113 extern void ceph_auth_invalidate_authorizer(struct ceph_auth_client *ac,
 114                                             int peer_type);
 115
 116 #endif