summaryrefslogtreecommitdiffstats
path: root/include/keys/rxrpc-type.h
blob: fc487543381799c4c4eb421d6dd2f802b9543d99 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
/* RxRPC key type
 *
 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 */

#ifndef _KEYS_RXRPC_TYPE_H
#define _KEYS_RXRPC_TYPE_H

#include <linux/key.h>

/*
 * key type for AF_RXRPC keys
 */
extern struct key_type key_type_rxrpc;

extern struct key *rxrpc_get_null_key(const char *);

/*
 * RxRPC key for Kerberos IV (type-2 security)
 */
struct rxkad_key {
	u32	vice_id;
	u32	start;			/* time at which ticket starts */
	u32	expiry;			/* time at which ticket expires */
	u32	kvno;			/* key version number */
	u8	primary_flag;		/* T if key for primary cell for this user */
	u16	ticket_len;		/* length of ticket[] */
	u8	session_key[8];		/* DES session key */
	u8	ticket[0];		/* the encrypted ticket */
};

/*
 * Kerberos 5 principal
 *	name/name/name@realm
 */
struct krb5_principal {
	u8	n_name_parts;		/* N of parts of the name part of the principal */
	char	**name_parts;		/* parts of the name part of the principal */
	char	*realm;			/* parts of the realm part of the principal */
};

/*
 * Kerberos 5 tagged data
 */
struct krb5_tagged_data {
	/* for tag value, see /usr/include/krb5/krb5.h
	 * - KRB5_AUTHDATA_* for auth data
	 * - 
	 */
	s32		tag;
	u32		data_len;
	u8		*data;
};

/*
 * RxRPC key for Kerberos V (type-5 security)
 */
struct rxk5_key {
	u64			authtime;	/* time at which auth token generated */
	u64			starttime;	/* time at which auth token starts */
	u64			endtime;	/* time at which auth token expired */
	u64			renew_till;	/* time to which auth token can be renewed */
	s32			is_skey;	/* T if ticket is encrypted in another ticket's
						 * skey */
	s32			flags;		/* mask of TKT_FLG_* bits (krb5/krb5.h) */
	struct krb5_principal	client;		/* client principal name */
	struct krb5_principal	server;		/* server principal name */
	u16			ticket_len;	/* length of ticket */
	u16			ticket2_len;	/* length of second ticket */
	u8			n_authdata;	/* number of authorisation data elements */
	u8			n_addresses;	/* number of addresses */
	struct krb5_tagged_data	session;	/* session data; tag is enctype */
	struct krb5_tagged_data *addresses;	/* addresses */
	u8			*ticket;	/* krb5 ticket */
	u8			*ticket2;	/* second krb5 ticket, if related to ticket (via
						 * DUPLICATE-SKEY or ENC-TKT-IN-SKEY) */
	struct krb5_tagged_data *authdata;	/* authorisation data */
};

/*
 * list of tokens attached to an rxrpc key
 */
struct rxrpc_key_token {
	u16	security_index;		/* RxRPC header security index */
	struct rxrpc_key_token *next;	/* the next token in the list */
	union {
		struct rxkad_key *kad;
		struct rxk5_key *k5;
	};
};

/*
 * structure of raw payloads passed to add_key() or instantiate key
 */
struct rxrpc_key_data_v1 {
	u16		security_index;
	u16		ticket_length;
	u32		expiry;			/* time_t */
	u32		kvno;
	u8		session_key[8];
	u8		ticket[0];
};

/*
 * AF_RXRPC key payload derived from XDR format
 * - based on openafs-1.4.10/src/auth/afs_token.xg
 */
#define AFSTOKEN_LENGTH_MAX		16384	/* max payload size */
#define AFSTOKEN_STRING_MAX		256	/* max small string length */
#define AFSTOKEN_DATA_MAX		64	/* max small data length */
#define AFSTOKEN_CELL_MAX		64	/* max cellname length */
#define AFSTOKEN_MAX			8	/* max tokens per payload */
#define AFSTOKEN_BDATALN_MAX		16384	/* max big data length */
#define AFSTOKEN_RK_TIX_MAX		12000	/* max RxKAD ticket size */
#define AFSTOKEN_GK_KEY_MAX		64	/* max GSSAPI key size */
#define AFSTOKEN_GK_TOKEN_MAX		16384	/* max GSSAPI token size */
#define AFSTOKEN_K5_COMPONENTS_MAX	16	/* max K5 components */
#define AFSTOKEN_K5_NAME_MAX		128	/* max K5 name length */
#define AFSTOKEN_K5_REALM_MAX		64	/* max K5 realm name length */
#define AFSTOKEN_K5_TIX_MAX		16384	/* max K5 ticket size */
#define AFSTOKEN_K5_ADDRESSES_MAX	16	/* max K5 addresses */
#define AFSTOKEN_K5_AUTHDATA_MAX	16	/* max K5 pieces of auth data */

#endif /* _KEYS_RXRPC_TYPE_H */