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         int (*verify_authorizer_reply)(struct ceph_auth_client *ac,
  56                                        struct ceph_authorizer *a, size_t len);
  57         void (*destroy_authorizer)(struct ceph_auth_client *ac,
  58                                    struct ceph_authorizer *a);
  59         void (*invalidate_authorizer)(struct ceph_auth_client *ac,
  60                                       int peer_type);
  61
  62         /* reset when we (re)connect to a monitor */
  63         void (*reset)(struct ceph_auth_client *ac);
  64
  65         void (*destroy)(struct ceph_auth_client *ac);
  66 };
  67
  68 struct ceph_auth_client {
  69         u32 protocol;           /* CEPH_AUTH_* */
  70         void *private;          /* for use by protocol implementation */
  71         const struct ceph_auth_client_ops *ops;  /* null iff protocol==0 */
  72
  73         bool negotiating;       /* true if negotiating protocol */
  74         const char *name;       /* entity name */
  75         u64 global_id;          /* our unique id in system */
  76         const struct ceph_crypto_key *key;     /* our secret key */
  77         unsigned want_keys;     /* which services we want */
  78 };
  79
  80 extern struct ceph_auth_client *ceph_auth_init(const char *name,
  81                                                const struct ceph_crypto_key *key);
  82 extern void ceph_auth_destroy(struct ceph_auth_client *ac);
  83
  84 extern void ceph_auth_reset(struct ceph_auth_client *ac);
  85
  86 extern int ceph_auth_build_hello(struct ceph_auth_client *ac,
  87                                  void *buf, size_t len);
  88 extern int ceph_handle_auth_reply(struct ceph_auth_client *ac,
  89                                   void *buf, size_t len,
  90                                   void *reply_buf, size_t reply_len);
  91 extern int ceph_entity_name_encode(const char *name, void **p, void *end);
  92
  93 extern int ceph_build_auth(struct ceph_auth_client *ac,
  94                     void *msg_buf, size_t msg_len);
  95
  96 extern int ceph_auth_is_authenticated(struct ceph_auth_client *ac);
  97
  98 #endif