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 * $Id$
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 struct xdr_buf *message,
44 struct xdr_netobj *mic_token);
45 u32 gss_verify_mic(
46 struct gss_ctx *ctx_id,
47 struct xdr_buf *message,
48 struct xdr_netobj *mic_token);
49 u32 gss_wrap(
50 struct gss_ctx *ctx_id,
51 int offset,
52 struct xdr_buf *outbuf,
53 struct page **inpages);
54 u32 gss_unwrap(
55 struct gss_ctx *ctx_id,
56 int offset,
57 struct xdr_buf *inbuf);
58 u32 gss_delete_sec_context(
59 struct gss_ctx **ctx_id);
60
61 u32 gss_svc_to_pseudoflavor(struct gss_api_mech *, u32 service);
62 u32 gss_pseudoflavor_to_service(struct gss_api_mech *, u32 pseudoflavor);
63 char *gss_service_to_auth_domain_name(struct gss_api_mech *, u32 service);
64
65 struct pf_desc {
66 u32 pseudoflavor;
67 u32 service;
68 char *name;
69 char *auth_domain_name;
70 };
71
72 /* Different mechanisms (e.g., krb5 or spkm3) may implement gss-api, and
73 * mechanisms may be dynamically registered or unregistered by modules. */
74
75 /* Each mechanism is described by the following struct: */
76 struct gss_api_mech {
77 struct list_head gm_list;
78 struct module *gm_owner;
79 struct xdr_netobj gm_oid;
80 char *gm_name;
81 const struct gss_api_ops *gm_ops;
82 /* pseudoflavors supported by this mechanism: */
83 int gm_pf_num;
84 struct pf_desc * gm_pfs;
85 };
86
87 /* and must provide the following operations: */
88 struct gss_api_ops {
89 int (*gss_import_sec_context)(
90 const void *input_token,
91 size_t bufsize,
92 struct gss_ctx *ctx_id);
93 u32 (*gss_get_mic)(
94 struct gss_ctx *ctx_id,
95 struct xdr_buf *message,
96 struct xdr_netobj *mic_token);
97 u32 (*gss_verify_mic)(
98 struct gss_ctx *ctx_id,
99 struct xdr_buf *message,
100 struct xdr_netobj *mic_token);
101 u32 (*gss_wrap)(
102 struct gss_ctx *ctx_id,
103 int offset,
104 struct xdr_buf *outbuf,
105 struct page **inpages);
106 u32 (*gss_unwrap)(
107 struct gss_ctx *ctx_id,
108 int offset,
109 struct xdr_buf *buf);
110 void (*gss_delete_sec_context)(
111 void *internal_ctx_id);
112 };
113
114 int gss_mech_register(struct gss_api_mech *);
115 void gss_mech_unregister(struct gss_api_mech *);
116
117 /* returns a mechanism descriptor given an OID, and increments the mechanism's
118 * reference count. */
119 struct gss_api_mech * gss_mech_get_by_OID(struct xdr_netobj *);
120
121 /* Returns a reference to a mechanism, given a name like "krb5" etc. */
122 struct gss_api_mech *gss_mech_get_by_name(const char *);
123
124 /* Similar, but get by pseudoflavor. */
125 struct gss_api_mech *gss_mech_get_by_pseudoflavor(u32);
126
127 /* Just increments the mechanism's reference count and returns its input: */
128 struct gss_api_mech * gss_mech_get(struct gss_api_mech *);
129
130 /* For every successful gss_mech_get or gss_mech_get_by_* call there must be a
131 * corresponding call to gss_mech_put. */
132 void gss_mech_put(struct gss_api_mech *);
133
134 #endif /* __KERNEL__ */
135 #endif /* _LINUX_SUNRPC_GSS_API_H */
136
137
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