Return to uvm_swap_encrypt.h CVS log

Up to [local] / sys / uvm

Annotation of sys/uvm/uvm_swap_encrypt.h, Revision 1.1.1.1

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 */