cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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rxrpc-type.h (2399B)

      1/* SPDX-License-Identifier: GPL-2.0-or-later */
      2/* RxRPC key type
      3 *
      4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
      5 * Written by David Howells (dhowells@redhat.com)
      6 */
      7
      8#ifndef _KEYS_RXRPC_TYPE_H
      9#define _KEYS_RXRPC_TYPE_H
     10
     11#include <linux/key.h>
     12
     13/*
     14 * key type for AF_RXRPC keys
     15 */
     16extern struct key_type key_type_rxrpc;
     17
     18extern struct key *rxrpc_get_null_key(const char *);
     19
     20/*
     21 * RxRPC key for Kerberos IV (type-2 security)
     22 */
     23struct rxkad_key {
     24	u32	vice_id;
     25	u32	start;			/* time at which ticket starts */
     26	u32	expiry;			/* time at which ticket expires */
     27	u32	kvno;			/* key version number */
     28	u8	primary_flag;		/* T if key for primary cell for this user */
     29	u16	ticket_len;		/* length of ticket[] */
     30	u8	session_key[8];		/* DES session key */
     31	u8	ticket[];		/* the encrypted ticket */
     32};
     33
     34/*
     35 * list of tokens attached to an rxrpc key
     36 */
     37struct rxrpc_key_token {
     38	u16	security_index;		/* RxRPC header security index */
     39	bool	no_leak_key;		/* Don't copy the key to userspace */
     40	struct rxrpc_key_token *next;	/* the next token in the list */
     41	union {
     42		struct rxkad_key *kad;
     43	};
     44};
     45
     46/*
     47 * structure of raw payloads passed to add_key() or instantiate key
     48 */
     49struct rxrpc_key_data_v1 {
     50	u16		security_index;
     51	u16		ticket_length;
     52	u32		expiry;			/* time_t */
     53	u32		kvno;
     54	u8		session_key[8];
     55	u8		ticket[];
     56};
     57
     58/*
     59 * AF_RXRPC key payload derived from XDR format
     60 * - based on openafs-1.4.10/src/auth/afs_token.xg
     61 */
     62#define AFSTOKEN_LENGTH_MAX		16384	/* max payload size */
     63#define AFSTOKEN_STRING_MAX		256	/* max small string length */
     64#define AFSTOKEN_DATA_MAX		64	/* max small data length */
     65#define AFSTOKEN_CELL_MAX		64	/* max cellname length */
     66#define AFSTOKEN_MAX			8	/* max tokens per payload */
     67#define AFSTOKEN_BDATALN_MAX		16384	/* max big data length */
     68#define AFSTOKEN_RK_TIX_MAX		12000	/* max RxKAD ticket size */
     69#define AFSTOKEN_GK_KEY_MAX		64	/* max GSSAPI key size */
     70#define AFSTOKEN_GK_TOKEN_MAX		16384	/* max GSSAPI token size */
     71
     72/*
     73 * Truncate a time64_t to the range from 1970 to 2106 as in the network
     74 * protocol.
     75 */
     76static inline u32 rxrpc_time64_to_u32(time64_t time)
     77{
     78	if (time < 0)
     79		return 0;
     80
     81	if (time > UINT_MAX)
     82		return UINT_MAX;
     83
     84	return (u32)time;
     85}
     86
     87/*
     88 * Extend u32 back to time64_t using the same 1970-2106 range.
     89 */
     90static inline time64_t rxrpc_u32_to_time64(u32 time)
     91{
     92	return (time64_t)time;
     93}
     94
     95#endif /* _KEYS_RXRPC_TYPE_H */