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18bdc20be1
There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://github.com/KSPP/linux/issues/21 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
150 lines
4.2 KiB
C
150 lines
4.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* RxRPC key type
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*/
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#ifndef _KEYS_RXRPC_TYPE_H
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#define _KEYS_RXRPC_TYPE_H
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#include <linux/key.h>
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/*
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* key type for AF_RXRPC keys
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*/
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extern struct key_type key_type_rxrpc;
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extern struct key *rxrpc_get_null_key(const char *);
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/*
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* RxRPC key for Kerberos IV (type-2 security)
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*/
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struct rxkad_key {
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u32 vice_id;
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u32 start; /* time at which ticket starts */
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u32 expiry; /* time at which ticket expires */
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u32 kvno; /* key version number */
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u8 primary_flag; /* T if key for primary cell for this user */
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u16 ticket_len; /* length of ticket[] */
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u8 session_key[8]; /* DES session key */
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u8 ticket[]; /* the encrypted ticket */
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};
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/*
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* Kerberos 5 principal
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* name/name/name@realm
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*/
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struct krb5_principal {
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u8 n_name_parts; /* N of parts of the name part of the principal */
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char **name_parts; /* parts of the name part of the principal */
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char *realm; /* parts of the realm part of the principal */
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};
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/*
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* Kerberos 5 tagged data
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*/
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struct krb5_tagged_data {
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/* for tag value, see /usr/include/krb5/krb5.h
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* - KRB5_AUTHDATA_* for auth data
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* -
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*/
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s32 tag;
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u32 data_len;
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u8 *data;
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};
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/*
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* RxRPC key for Kerberos V (type-5 security)
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*/
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struct rxk5_key {
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u64 authtime; /* time at which auth token generated */
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u64 starttime; /* time at which auth token starts */
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u64 endtime; /* time at which auth token expired */
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u64 renew_till; /* time to which auth token can be renewed */
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s32 is_skey; /* T if ticket is encrypted in another ticket's
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* skey */
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s32 flags; /* mask of TKT_FLG_* bits (krb5/krb5.h) */
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struct krb5_principal client; /* client principal name */
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struct krb5_principal server; /* server principal name */
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u16 ticket_len; /* length of ticket */
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u16 ticket2_len; /* length of second ticket */
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u8 n_authdata; /* number of authorisation data elements */
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u8 n_addresses; /* number of addresses */
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struct krb5_tagged_data session; /* session data; tag is enctype */
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struct krb5_tagged_data *addresses; /* addresses */
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u8 *ticket; /* krb5 ticket */
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u8 *ticket2; /* second krb5 ticket, if related to ticket (via
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* DUPLICATE-SKEY or ENC-TKT-IN-SKEY) */
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struct krb5_tagged_data *authdata; /* authorisation data */
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};
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/*
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* list of tokens attached to an rxrpc key
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*/
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struct rxrpc_key_token {
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u16 security_index; /* RxRPC header security index */
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struct rxrpc_key_token *next; /* the next token in the list */
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union {
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struct rxkad_key *kad;
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struct rxk5_key *k5;
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};
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};
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/*
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* structure of raw payloads passed to add_key() or instantiate key
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*/
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struct rxrpc_key_data_v1 {
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u16 security_index;
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u16 ticket_length;
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u32 expiry; /* time_t */
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u32 kvno;
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u8 session_key[8];
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u8 ticket[];
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};
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/*
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* AF_RXRPC key payload derived from XDR format
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* - based on openafs-1.4.10/src/auth/afs_token.xg
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*/
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#define AFSTOKEN_LENGTH_MAX 16384 /* max payload size */
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#define AFSTOKEN_STRING_MAX 256 /* max small string length */
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#define AFSTOKEN_DATA_MAX 64 /* max small data length */
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#define AFSTOKEN_CELL_MAX 64 /* max cellname length */
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#define AFSTOKEN_MAX 8 /* max tokens per payload */
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#define AFSTOKEN_BDATALN_MAX 16384 /* max big data length */
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#define AFSTOKEN_RK_TIX_MAX 12000 /* max RxKAD ticket size */
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#define AFSTOKEN_GK_KEY_MAX 64 /* max GSSAPI key size */
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#define AFSTOKEN_GK_TOKEN_MAX 16384 /* max GSSAPI token size */
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#define AFSTOKEN_K5_COMPONENTS_MAX 16 /* max K5 components */
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#define AFSTOKEN_K5_NAME_MAX 128 /* max K5 name length */
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#define AFSTOKEN_K5_REALM_MAX 64 /* max K5 realm name length */
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#define AFSTOKEN_K5_TIX_MAX 16384 /* max K5 ticket size */
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#define AFSTOKEN_K5_ADDRESSES_MAX 16 /* max K5 addresses */
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#define AFSTOKEN_K5_AUTHDATA_MAX 16 /* max K5 pieces of auth data */
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/*
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* Truncate a time64_t to the range from 1970 to 2106 as in the network
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* protocol.
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*/
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static inline u32 rxrpc_time64_to_u32(time64_t time)
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{
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if (time < 0)
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return 0;
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if (time > UINT_MAX)
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return UINT_MAX;
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return (u32)time;
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}
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/*
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* Extend u32 back to time64_t using the same 1970-2106 range.
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*/
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static inline time64_t rxrpc_u32_to_time64(u32 time)
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{
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return (time64_t)time;
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}
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#endif /* _KEYS_RXRPC_TYPE_H */
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