fs/ceph/auth.h

   1 #ifndef _FS_CEPH_AUTH_H
   2 #define _FS_CEPH_AUTH_H
   3
   4 #include "types.h"
   5 #include "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_client_ops {
  18         /*
  19          * true if we are authenticated and can connect to
  20          * services.
  21          */
  22         int (*is_authenticated)(struct ceph_auth_client *ac);
  23
  24         /*
  25          * build requests and process replies during monitor
  26          * handshake.  if handle_reply returns -EAGAIN, we build
  27          * another request.
  28          */
  29         int (*build_request)(struct ceph_auth_client *ac, void *buf, void *end);
  30         int (*handle_reply)(struct ceph_auth_client *ac, int result,
  31                             void *buf, void *end);
  32
  33         /*
  34          * Create authorizer for connecting to a service, and verify
  35          * the response to authenticate the service.
  36          */
  37         int (*create_authorizer)(struct ceph_auth_client *ac, int peer_type,
  38                                  struct ceph_authorizer **a,
  39                                  void **buf, size_t *len,
  40                                  void **reply_buf, size_t *reply_len);
  41         int (*verify_authorizer_reply)(struct ceph_auth_client *ac,
  42                                        struct ceph_authorizer *a, size_t len);
  43         void (*destroy_authorizer)(struct ceph_auth_client *ac,
  44                                    struct ceph_authorizer *a);
  45         void (*invalidate_authorizer)(struct ceph_auth_client *ac,
  46                                       int peer_type);
  47
  48         /* reset when we (re)connect to a monitor */
  49         void (*reset)(struct ceph_auth_client *ac);
  50
  51         void (*destroy)(struct ceph_auth_client *ac);
  52 };
  53
  54 struct ceph_auth_client {
  55         u32 protocol;           /* CEPH_AUTH_* */
  56         void *private;          /* for use by protocol implementation */
  57         const struct ceph_auth_client_ops *ops;  /* null iff protocol==0 */
  58
  59         bool negotiating;       /* true if negotiating protocol */
  60         const char *name;       /* entity name */
  61         u64 global_id;          /* our unique id in system */
  62         const char *secret;     /* our secret key */
  63         unsigned want_keys;     /* which services we want */
  64 };
  65
  66 extern struct ceph_auth_client *ceph_auth_init(const char *name,
  67                                                const char *secret);
  68 extern void ceph_auth_destroy(struct ceph_auth_client *ac);
  69
  70 extern void ceph_auth_reset(struct ceph_auth_client *ac);
  71
  72 extern int ceph_auth_build_hello(struct ceph_auth_client *ac,
  73                                  void *buf, size_t len);
  74 extern int ceph_handle_auth_reply(struct ceph_auth_client *ac,
  75                                   void *buf, size_t len,
  76                                   void *reply_buf, size_t reply_len);
  77 extern int ceph_entity_name_encode(const char *name, void **p, void *end);
  78
  79 extern int ceph_build_auth(struct ceph_auth_client *ac,
  80                     void *msg_buf, size_t msg_len);
  81
  82 extern int ceph_auth_is_authenticated(struct ceph_auth_client *ac);
  83
  84 #endif