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1/*
2 * Copyright (c) 2001-2003 Simon Wilkinson. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#ifndef _SSH_GSS_H
26#define _SSH_GSS_H
27
28#ifdef GSSAPI
29
30#include "buffer.h"
31
32#include <gssapi.h>
33
34#ifdef KRB5
35#ifndef HEIMDAL
36#include <gssapi_generic.h>
37
38/* MIT Kerberos doesn't seem to define GSS_NT_HOSTBASED_SERVICE */
39
40#ifndef GSS_C_NT_HOSTBASED_SERVICE
41#define GSS_C_NT_HOSTBASED_SERVICE gss_nt_service_name
42#endif /* GSS_C_NT_... */
43#endif /* !HEIMDAL */
44#endif /* KRB5 */
45
46/* draft-ietf-secsh-gsskeyex-06 */
47#define SSH2_MSG_USERAUTH_GSSAPI_RESPONSE 60
48#define SSH2_MSG_USERAUTH_GSSAPI_TOKEN 61
49#define SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE 63
50#define SSH2_MSG_USERAUTH_GSSAPI_ERROR 64
51#define SSH2_MSG_USERAUTH_GSSAPI_ERRTOK 65
52
53#define SSH_GSS_OIDTYPE 0x06
54
55typedef struct {
56 char *filename;
57 char *envvar;
58 char *envval;
59 void *data;
60} ssh_gssapi_ccache;
61
62typedef struct {
63 gss_buffer_desc displayname;
64 gss_buffer_desc exportedname;
65 gss_cred_id_t creds;
66 struct ssh_gssapi_mech_struct *mech;
67 ssh_gssapi_ccache store;
68} ssh_gssapi_client;
69
70typedef struct ssh_gssapi_mech_struct {
71 char *enc_name;
72 char *name;
73 gss_OID_desc oid;
74 int (*dochild) (ssh_gssapi_client *);
75 int (*userok) (ssh_gssapi_client *, char *);
76 int (*localname) (ssh_gssapi_client *, char **);
77 void (*storecreds) (ssh_gssapi_client *);
78} ssh_gssapi_mech;
79
80typedef struct {
81 OM_uint32 major; /* both */
82 OM_uint32 minor; /* both */
83 gss_ctx_id_t context; /* both */
84 gss_name_t name; /* both */
85 gss_OID oid; /* client */
86 gss_cred_id_t creds; /* server */
87 gss_name_t client; /* server */
88 gss_cred_id_t client_creds; /* server */
89} Gssctxt;
90
91extern ssh_gssapi_mech *supported_mechs[];
92
93int ssh_gssapi_check_oid(Gssctxt *ctx, void *data, size_t len);
94void ssh_gssapi_set_oid_data(Gssctxt *ctx, void *data, size_t len);
95void ssh_gssapi_set_oid(Gssctxt *ctx, gss_OID oid);
96void ssh_gssapi_supported_oids(gss_OID_set *oidset);
97ssh_gssapi_mech *ssh_gssapi_get_ctype(Gssctxt *ctxt);
98
99OM_uint32 ssh_gssapi_import_name(Gssctxt *ctx, const char *host);
100OM_uint32 ssh_gssapi_acquire_cred(Gssctxt *ctx);
101OM_uint32 ssh_gssapi_init_ctx(Gssctxt *ctx, int deleg_creds,
102 gss_buffer_desc *recv_tok, gss_buffer_desc *send_tok, OM_uint32 *flags);
103OM_uint32 ssh_gssapi_accept_ctx(Gssctxt *ctx,
104 gss_buffer_desc *recv_tok, gss_buffer_desc *send_tok, OM_uint32 *flags);
105OM_uint32 ssh_gssapi_getclient(Gssctxt *ctx, ssh_gssapi_client *);
106void ssh_gssapi_error(Gssctxt *ctx);
107char *ssh_gssapi_last_error(Gssctxt *ctxt, OM_uint32 *maj, OM_uint32 *min);
108void ssh_gssapi_build_ctx(Gssctxt **ctx);
109void ssh_gssapi_delete_ctx(Gssctxt **ctx);
110OM_uint32 ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID oid);
111
112/* In the server */
113int ssh_gssapi_userok(char *name);
114
115void ssh_gssapi_do_child(char ***envp, u_int *envsizep);
116void ssh_gssapi_cleanup_creds(void *ignored);
117void ssh_gssapi_storecreds(void);
118
119#endif /* GSSAPI */
120
121#endif /* _SSH_GSS_H */