[PATCH] RPC: clean up after nocong was removed
[linux-2.6] / include / linux / sunrpc / gss_api.h
1 /*
2  * linux/include/linux/gss_api.h
3  *
4  * Somewhat simplified version of the gss api.
5  *
6  * Dug Song <dugsong@monkey.org>
7  * Andy Adamson <andros@umich.edu>
8  * Bruce Fields <bfields@umich.edu>
9  * Copyright (c) 2000 The Regents of the University of Michigan
10  *
11  * $Id$
12  */
13
14 #ifndef _LINUX_SUNRPC_GSS_API_H
15 #define _LINUX_SUNRPC_GSS_API_H
16
17 #ifdef __KERNEL__
18 #include <linux/sunrpc/xdr.h>
19 #include <linux/uio.h>
20
21 /* The mechanism-independent gss-api context: */
22 struct gss_ctx {
23         struct gss_api_mech     *mech_type;
24         void                    *internal_ctx_id;
25 };
26
27 #define GSS_C_NO_BUFFER         ((struct xdr_netobj) 0)
28 #define GSS_C_NO_CONTEXT        ((struct gss_ctx *) 0)
29 #define GSS_C_NULL_OID          ((struct xdr_netobj) 0)
30
31 /*XXX  arbitrary length - is this set somewhere? */
32 #define GSS_OID_MAX_LEN 32
33
34 /* gss-api prototypes; note that these are somewhat simplified versions of
35  * the prototypes specified in RFC 2744. */
36 int gss_import_sec_context(
37                 const void*             input_token,
38                 size_t                  bufsize,
39                 struct gss_api_mech     *mech,
40                 struct gss_ctx          **ctx_id);
41 u32 gss_get_mic(
42                 struct gss_ctx          *ctx_id,
43                 u32                     qop,
44                 struct xdr_buf          *message,
45                 struct xdr_netobj       *mic_token);
46 u32 gss_verify_mic(
47                 struct gss_ctx          *ctx_id,
48                 struct xdr_buf          *message,
49                 struct xdr_netobj       *mic_token,
50                 u32                     *qstate);
51 u32 gss_delete_sec_context(
52                 struct gss_ctx          **ctx_id);
53
54 u32 gss_pseudoflavor_to_service(struct gss_api_mech *, u32 pseudoflavor);
55 char *gss_service_to_auth_domain_name(struct gss_api_mech *, u32 service);
56
57 struct pf_desc {
58         u32     pseudoflavor;
59         u32     qop;
60         u32     service;
61         char    *name;
62         char    *auth_domain_name;
63 };
64
65 /* Different mechanisms (e.g., krb5 or spkm3) may implement gss-api, and
66  * mechanisms may be dynamically registered or unregistered by modules. */
67
68 /* Each mechanism is described by the following struct: */
69 struct gss_api_mech {
70         struct list_head        gm_list;
71         struct module           *gm_owner;
72         struct xdr_netobj       gm_oid;
73         char                    *gm_name;
74         struct gss_api_ops      *gm_ops;
75         /* pseudoflavors supported by this mechanism: */
76         int                     gm_pf_num;
77         struct pf_desc *        gm_pfs;
78 };
79
80 /* and must provide the following operations: */
81 struct gss_api_ops {
82         int (*gss_import_sec_context)(
83                         const void              *input_token,
84                         size_t                  bufsize,
85                         struct gss_ctx          *ctx_id);
86         u32 (*gss_get_mic)(
87                         struct gss_ctx          *ctx_id,
88                         u32                     qop, 
89                         struct xdr_buf          *message,
90                         struct xdr_netobj       *mic_token);
91         u32 (*gss_verify_mic)(
92                         struct gss_ctx          *ctx_id,
93                         struct xdr_buf          *message,
94                         struct xdr_netobj       *mic_token,
95                         u32                     *qstate);
96         void (*gss_delete_sec_context)(
97                         void                    *internal_ctx_id);
98 };
99
100 int gss_mech_register(struct gss_api_mech *);
101 void gss_mech_unregister(struct gss_api_mech *);
102
103 /* returns a mechanism descriptor given an OID, and increments the mechanism's
104  * reference count. */
105 struct gss_api_mech * gss_mech_get_by_OID(struct xdr_netobj *);
106
107 /* Returns a reference to a mechanism, given a name like "krb5" etc. */
108 struct gss_api_mech *gss_mech_get_by_name(const char *);
109
110 /* Similar, but get by pseudoflavor. */
111 struct gss_api_mech *gss_mech_get_by_pseudoflavor(u32);
112
113 /* Just increments the mechanism's reference count and returns its input: */
114 struct gss_api_mech * gss_mech_get(struct gss_api_mech *);
115
116 /* For every succesful gss_mech_get or gss_mech_get_by_* call there must be a
117  * corresponding call to gss_mech_put. */
118 void gss_mech_put(struct gss_api_mech *);
119
120 #endif /* __KERNEL__ */
121 #endif /* _LINUX_SUNRPC_GSS_API_H */
122