86 lines
3.1 KiB
C
86 lines
3.1 KiB
C
/* $OpenBSD: uvm_swap_encrypt.h,v 1.11 2024/05/12 09:27:13 jsg Exp $ */
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/*
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* Copyright 1999 Niels Provos <provos@citi.umich.edu>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Niels Provos.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _UVM_SWAP_ENCRYPT_H
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#define _UVM_SWAP_ENCRYPT_H
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#define SWPENC_ENABLE 0
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#define SWPENC_CREATED 1
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#define SWPENC_DELETED 2
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#define SWPENC_MAXID 3
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#define CTL_SWPENC_NAMES { \
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{ "enable", CTLTYPE_INT }, \
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{ "keyscreated", CTLTYPE_INT }, \
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{ "keysdeleted", CTLTYPE_INT }, \
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}
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#define SWAP_KEY_EXPIRE (120 /*60 * 60*/) /* time after that keys expire */
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#define SWAP_KEY_SIZE 4 /* 128-bit keys */
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struct swap_key {
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u_int32_t key[SWAP_KEY_SIZE]; /* secret key for swap range */
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u_int16_t refcount; /* pages that still need it */
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};
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int swap_encrypt_ctl(int *, u_int, void *, size_t *, void *, size_t,
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struct proc *);
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void swap_encrypt(struct swap_key *,caddr_t, caddr_t, u_int64_t, size_t);
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void swap_decrypt(struct swap_key *,caddr_t, caddr_t, u_int64_t, size_t);
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void swap_key_cleanup(struct swap_key *);
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void swap_key_prepare(struct swap_key *, int);
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#define SWAP_KEY_GET(s,x) do { \
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if ((x)->refcount == 0) { \
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swap_key_create(x); \
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} \
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(x)->refcount++; \
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} while(0);
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#define SWAP_KEY_PUT(s,x) do { \
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(x)->refcount--; \
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if ((x)->refcount == 0) { \
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swap_key_delete(x); \
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} \
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} while(0);
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void swap_key_create(struct swap_key *);
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void swap_key_delete(struct swap_key *);
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extern int uvm_doswapencrypt; /* swapencrypt enabled/disabled */
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extern u_int uvm_swpkeyexpire; /* expiry time for keys (tR) */
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extern int swap_encrypt_initialized;
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#endif /* _UVM_SWAP_ENCRYPT_H */
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