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/* SPDX-License-Identifier: GPL-2.0-or-later */
/* RxRPC key type
*
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
#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[]; /* 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[];
};
/*
* 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 */
/*
* Truncate a time64_t to the range from 1970 to 2106 as in the network
* protocol.
*/
static inline u32 rxrpc_time64_to_u32(time64_t time)
{
if (time < 0)
return 0;
if (time > UINT_MAX)
return UINT_MAX;
return (u32)time;
}
/*
* Extend u32 back to time64_t using the same 1970-2106 range.
*/
static inline time64_t rxrpc_u32_to_time64(u32 time)
{
return (time64_t)time;
}
#endif /* _KEYS_RXRPC_TYPE_H */
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