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Annotation of sys/uvm/uvm_swap_encrypt.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: uvm_swap_encrypt.h,v 1.7 2002/07/02 19:38:55 nate Exp $       */
        !             2:
        !             3: /*
        !             4:  * Copyright 1999 Niels Provos <provos@citi.umich.edu>
        !             5:  * All rights reserved.
        !             6:  *
        !             7:  * Redistribution and use in source and binary forms, with or without
        !             8:  * modification, are permitted provided that the following conditions
        !             9:  * are met:
        !            10:  * 1. Redistributions of source code must retain the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer.
        !            12:  * 2. Redistributions in binary form must reproduce the above copyright
        !            13:  *    notice, this list of conditions and the following disclaimer in the
        !            14:  *    documentation and/or other materials provided with the distribution.
        !            15:  * 3. All advertising materials mentioning features or use of this software
        !            16:  *    must display the following acknowledgement:
        !            17:  *      This product includes software developed by Niels Provos.
        !            18:  * 4. The name of the author may not be used to endorse or promote products
        !            19:  *    derived from this software without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
        !            22:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            23:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            24:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
        !            25:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
        !            26:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
        !            27:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
        !            28:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
        !            29:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
        !            30:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        !            31:  */
        !            32:
        !            33: #ifndef _UVM_SWAP_ENCRYPT_H
        !            34: #define _UVM_SWAP_ENCRYPT_H
        !            35:
        !            36: #define SWPENC_ENABLE  0
        !            37: #define SWPENC_CREATED 1
        !            38: #define SWPENC_DELETED 2
        !            39: #define SWPENC_MAXID   3
        !            40:
        !            41: #define CTL_SWPENC_NAMES { \
        !            42:        { "enable", CTLTYPE_INT }, \
        !            43:        { "keyscreated", CTLTYPE_INT }, \
        !            44:        { "keysdeleted", CTLTYPE_INT }, \
        !            45: }
        !            46:
        !            47: #define SWAP_KEY_EXPIRE (120 /*60 * 60*/)      /* time after that keys expire */
        !            48: #define SWAP_KEY_SIZE  4               /* 128-bit keys */
        !            49:
        !            50: struct swap_key {
        !            51:        u_int32_t key[SWAP_KEY_SIZE];   /* secret key for swap range */
        !            52:        u_int16_t refcount;             /* pages that still need it */
        !            53: };
        !            54:
        !            55: int swap_encrypt_ctl(int *, u_int, void *, size_t *, void *, size_t,
        !            56:                          struct proc *);
        !            57:
        !            58: void swap_encrypt(struct swap_key *,caddr_t, caddr_t, u_int64_t, size_t);
        !            59: void swap_decrypt(struct swap_key *,caddr_t, caddr_t, u_int64_t, size_t);
        !            60:
        !            61: void swap_key_cleanup(struct swap_key *);
        !            62: void swap_key_prepare(struct swap_key *, int);
        !            63:
        !            64: #define SWAP_KEY_GET(s,x) do { if ((x)->refcount == 0) {\
        !            65:                                        swap_key_create(x); \
        !            66:                               } \
        !            67:                               (x)->refcount++; } while(0);
        !            68: #define SWAP_KEY_PUT(s,x) do { (x)->refcount--; \
        !            69:                               if ((x)->refcount == 0) { \
        !            70:                                        swap_key_delete(x); \
        !            71:                               } \
        !            72:                             } while(0);
        !            73:
        !            74: void swap_key_create(struct swap_key *);
        !            75: void swap_key_delete(struct swap_key *);
        !            76:
        !            77: extern int uvm_doswapencrypt;          /* swapencrypt enabled/disabled */
        !            78: extern int uvm_swprekeyprint;
        !            79: extern u_int uvm_swpkeyexpire;         /* expiry time for keys (tR) */
        !            80: extern int swap_encrypt_initialized;
        !            81:
        !            82: #endif /* _UVM_SWAP_ENCRYPT_H */