]> pilppa.org Git - linux-2.6-omap-h63xx.git/blob - include/linux/sunrpc/gss_api.h
Merge branch 'omap-clock-fixes' of git://git.pwsan.com/linux-2.6
[linux-2.6-omap-h63xx.git] / include / linux / sunrpc / gss_api.h
1 /*
2  * linux/include/linux/sunrpc/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
12 #ifndef _LINUX_SUNRPC_GSS_API_H
13 #define _LINUX_SUNRPC_GSS_API_H
14
15 #ifdef __KERNEL__
16 #include <linux/sunrpc/xdr.h>
17 #include <linux/uio.h>
18
19 /* The mechanism-independent gss-api context: */
20 struct gss_ctx {
21         struct gss_api_mech     *mech_type;
22         void                    *internal_ctx_id;
23 };
24
25 #define GSS_C_NO_BUFFER         ((struct xdr_netobj) 0)
26 #define GSS_C_NO_CONTEXT        ((struct gss_ctx *) 0)
27 #define GSS_C_NULL_OID          ((struct xdr_netobj) 0)
28
29 /*XXX  arbitrary length - is this set somewhere? */
30 #define GSS_OID_MAX_LEN 32
31
32 /* gss-api prototypes; note that these are somewhat simplified versions of
33  * the prototypes specified in RFC 2744. */
34 int gss_import_sec_context(
35                 const void*             input_token,
36                 size_t                  bufsize,
37                 struct gss_api_mech     *mech,
38                 struct gss_ctx          **ctx_id);
39 u32 gss_get_mic(
40                 struct gss_ctx          *ctx_id,
41                 struct xdr_buf          *message,
42                 struct xdr_netobj       *mic_token);
43 u32 gss_verify_mic(
44                 struct gss_ctx          *ctx_id,
45                 struct xdr_buf          *message,
46                 struct xdr_netobj       *mic_token);
47 u32 gss_wrap(
48                 struct gss_ctx          *ctx_id,
49                 int                     offset,
50                 struct xdr_buf          *outbuf,
51                 struct page             **inpages);
52 u32 gss_unwrap(
53                 struct gss_ctx          *ctx_id,
54                 int                     offset,
55                 struct xdr_buf          *inbuf);
56 u32 gss_delete_sec_context(
57                 struct gss_ctx          **ctx_id);
58
59 u32 gss_svc_to_pseudoflavor(struct gss_api_mech *, u32 service);
60 u32 gss_pseudoflavor_to_service(struct gss_api_mech *, u32 pseudoflavor);
61 char *gss_service_to_auth_domain_name(struct gss_api_mech *, u32 service);
62
63 struct pf_desc {
64         u32     pseudoflavor;
65         u32     service;
66         char    *name;
67         char    *auth_domain_name;
68 };
69
70 /* Different mechanisms (e.g., krb5 or spkm3) may implement gss-api, and
71  * mechanisms may be dynamically registered or unregistered by modules. */
72
73 /* Each mechanism is described by the following struct: */
74 struct gss_api_mech {
75         struct list_head        gm_list;
76         struct module           *gm_owner;
77         struct xdr_netobj       gm_oid;
78         char                    *gm_name;
79         const struct gss_api_ops *gm_ops;
80         /* pseudoflavors supported by this mechanism: */
81         int                     gm_pf_num;
82         struct pf_desc *        gm_pfs;
83 };
84
85 /* and must provide the following operations: */
86 struct gss_api_ops {
87         int (*gss_import_sec_context)(
88                         const void              *input_token,
89                         size_t                  bufsize,
90                         struct gss_ctx          *ctx_id);
91         u32 (*gss_get_mic)(
92                         struct gss_ctx          *ctx_id,
93                         struct xdr_buf          *message,
94                         struct xdr_netobj       *mic_token);
95         u32 (*gss_verify_mic)(
96                         struct gss_ctx          *ctx_id,
97                         struct xdr_buf          *message,
98                         struct xdr_netobj       *mic_token);
99         u32 (*gss_wrap)(
100                         struct gss_ctx          *ctx_id,
101                         int                     offset,
102                         struct xdr_buf          *outbuf,
103                         struct page             **inpages);
104         u32 (*gss_unwrap)(
105                         struct gss_ctx          *ctx_id,
106                         int                     offset,
107                         struct xdr_buf          *buf);
108         void (*gss_delete_sec_context)(
109                         void                    *internal_ctx_id);
110 };
111
112 int gss_mech_register(struct gss_api_mech *);
113 void gss_mech_unregister(struct gss_api_mech *);
114
115 /* returns a mechanism descriptor given an OID, and increments the mechanism's
116  * reference count. */
117 struct gss_api_mech * gss_mech_get_by_OID(struct xdr_netobj *);
118
119 /* Returns a reference to a mechanism, given a name like "krb5" etc. */
120 struct gss_api_mech *gss_mech_get_by_name(const char *);
121
122 /* Similar, but get by pseudoflavor. */
123 struct gss_api_mech *gss_mech_get_by_pseudoflavor(u32);
124
125 /* Just increments the mechanism's reference count and returns its input: */
126 struct gss_api_mech * gss_mech_get(struct gss_api_mech *);
127
128 /* For every successful gss_mech_get or gss_mech_get_by_* call there must be a
129  * corresponding call to gss_mech_put. */
130 void gss_mech_put(struct gss_api_mech *);
131
132 #endif /* __KERNEL__ */
133 #endif /* _LINUX_SUNRPC_GSS_API_H */
134