Revision 7cfb9532581ed3d0e542712be6f9ca5bc1c3b021 authored by Linus Torvalds on 31 May 2013, 21:56:21 UTC, committed by Linus Torvalds on 31 May 2013, 21:56:21 UTC
Pull xfs extended attribute fixes for CRCs from Ben Myers:
"Here are several fixes that are relevant on CRC enabled XFS
filesystems. They are followed by a rework of the remote attribute
code so that each block of the attribute contains a header with a CRC.
Previously there was a CRC header per extent in the remote attribute
code, but this was untenable because it was not possible to know how
many extents would be allocated for the attribute until after the
allocation has completed, due to the fragmentation of free space.
This became complicated because the size of the headers needs to be
added to the length of the payload to get the overall length required
for the allocation. With a header per block, things are less
complicated at the cost of a little space.
I would have preferred to defer this and the rest of the CRC queue to
3.11 to mitigate risk for existing non-crc users in 3.10. Doing so
would require setting a feature bit for the on-disk changes, and so I
have been pressured into sending this pull request by Eric Sandeen and
David Chinner from Red Hat. I'll send another pull request or two
with the rest of the CRC queue next week.
- Remove assert on count of remote attribute CRC headers
- Fix the number of blocks read in for remote attributes
- Zero remote attribute tails properly
- Fix mapping of remote attribute buffers to have correct length
- initialize temp leaf properly in xfs_attr3_leaf_unbalance, and
xfs_attr3_leaf_compact
- Rework remote atttributes to have a header per block"
* tag 'for-linus-v3.10-rc4-crc-xattr-fixes' of git://oss.sgi.com/xfs/xfs:
xfs: rework remote attr CRCs
xfs: fully initialise temp leaf in xfs_attr3_leaf_compact
xfs: fully initialise temp leaf in xfs_attr3_leaf_unbalance
xfs: correctly map remote attr buffers during removal
xfs: remote attribute tail zeroing does too much
xfs: remote attribute read too short
xfs: remote attribute allocation may be contiguous
fcrypt.c
/* FCrypt encryption algorithm
*
* Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Based on code:
*
* Copyright (c) 1995 - 2000 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <asm/byteorder.h>
#include <linux/bitops.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/crypto.h>
#define ROUNDS 16
struct fcrypt_ctx {
__be32 sched[ROUNDS];
};
/* Rotate right two 32 bit numbers as a 56 bit number */
#define ror56(hi, lo, n) \
do { \
u32 t = lo & ((1 << n) - 1); \
lo = (lo >> n) | ((hi & ((1 << n) - 1)) << (32 - n)); \
hi = (hi >> n) | (t << (24-n)); \
} while (0)
/* Rotate right one 64 bit number as a 56 bit number */
#define ror56_64(k, n) \
do { \
k = (k >> n) | ((k & ((1 << n) - 1)) << (56 - n)); \
} while (0)
/*
* Sboxes for Feistel network derived from
* /afs/transarc.com/public/afsps/afs.rel31b.export-src/rxkad/sboxes.h
*/
#undef Z
#define Z(x) cpu_to_be32(x << 3)
static const __be32 sbox0[256] = {
Z(0xea), Z(0x7f), Z(0xb2), Z(0x64), Z(0x9d), Z(0xb0), Z(0xd9), Z(0x11),
Z(0xcd), Z(0x86), Z(0x86), Z(0x91), Z(0x0a), Z(0xb2), Z(0x93), Z(0x06),
Z(0x0e), Z(0x06), Z(0xd2), Z(0x65), Z(0x73), Z(0xc5), Z(0x28), Z(0x60),
Z(0xf2), Z(0x20), Z(0xb5), Z(0x38), Z(0x7e), Z(0xda), Z(0x9f), Z(0xe3),
Z(0xd2), Z(0xcf), Z(0xc4), Z(0x3c), Z(0x61), Z(0xff), Z(0x4a), Z(0x4a),
Z(0x35), Z(0xac), Z(0xaa), Z(0x5f), Z(0x2b), Z(0xbb), Z(0xbc), Z(0x53),
Z(0x4e), Z(0x9d), Z(0x78), Z(0xa3), Z(0xdc), Z(0x09), Z(0x32), Z(0x10),
Z(0xc6), Z(0x6f), Z(0x66), Z(0xd6), Z(0xab), Z(0xa9), Z(0xaf), Z(0xfd),
Z(0x3b), Z(0x95), Z(0xe8), Z(0x34), Z(0x9a), Z(0x81), Z(0x72), Z(0x80),
Z(0x9c), Z(0xf3), Z(0xec), Z(0xda), Z(0x9f), Z(0x26), Z(0x76), Z(0x15),
Z(0x3e), Z(0x55), Z(0x4d), Z(0xde), Z(0x84), Z(0xee), Z(0xad), Z(0xc7),
Z(0xf1), Z(0x6b), Z(0x3d), Z(0xd3), Z(0x04), Z(0x49), Z(0xaa), Z(0x24),
Z(0x0b), Z(0x8a), Z(0x83), Z(0xba), Z(0xfa), Z(0x85), Z(0xa0), Z(0xa8),
Z(0xb1), Z(0xd4), Z(0x01), Z(0xd8), Z(0x70), Z(0x64), Z(0xf0), Z(0x51),
Z(0xd2), Z(0xc3), Z(0xa7), Z(0x75), Z(0x8c), Z(0xa5), Z(0x64), Z(0xef),
Z(0x10), Z(0x4e), Z(0xb7), Z(0xc6), Z(0x61), Z(0x03), Z(0xeb), Z(0x44),
Z(0x3d), Z(0xe5), Z(0xb3), Z(0x5b), Z(0xae), Z(0xd5), Z(0xad), Z(0x1d),
Z(0xfa), Z(0x5a), Z(0x1e), Z(0x33), Z(0xab), Z(0x93), Z(0xa2), Z(0xb7),
Z(0xe7), Z(0xa8), Z(0x45), Z(0xa4), Z(0xcd), Z(0x29), Z(0x63), Z(0x44),
Z(0xb6), Z(0x69), Z(0x7e), Z(0x2e), Z(0x62), Z(0x03), Z(0xc8), Z(0xe0),
Z(0x17), Z(0xbb), Z(0xc7), Z(0xf3), Z(0x3f), Z(0x36), Z(0xba), Z(0x71),
Z(0x8e), Z(0x97), Z(0x65), Z(0x60), Z(0x69), Z(0xb6), Z(0xf6), Z(0xe6),
Z(0x6e), Z(0xe0), Z(0x81), Z(0x59), Z(0xe8), Z(0xaf), Z(0xdd), Z(0x95),
Z(0x22), Z(0x99), Z(0xfd), Z(0x63), Z(0x19), Z(0x74), Z(0x61), Z(0xb1),
Z(0xb6), Z(0x5b), Z(0xae), Z(0x54), Z(0xb3), Z(0x70), Z(0xff), Z(0xc6),
Z(0x3b), Z(0x3e), Z(0xc1), Z(0xd7), Z(0xe1), Z(0x0e), Z(0x76), Z(0xe5),
Z(0x36), Z(0x4f), Z(0x59), Z(0xc7), Z(0x08), Z(0x6e), Z(0x82), Z(0xa6),
Z(0x93), Z(0xc4), Z(0xaa), Z(0x26), Z(0x49), Z(0xe0), Z(0x21), Z(0x64),
Z(0x07), Z(0x9f), Z(0x64), Z(0x81), Z(0x9c), Z(0xbf), Z(0xf9), Z(0xd1),
Z(0x43), Z(0xf8), Z(0xb6), Z(0xb9), Z(0xf1), Z(0x24), Z(0x75), Z(0x03),
Z(0xe4), Z(0xb0), Z(0x99), Z(0x46), Z(0x3d), Z(0xf5), Z(0xd1), Z(0x39),
Z(0x72), Z(0x12), Z(0xf6), Z(0xba), Z(0x0c), Z(0x0d), Z(0x42), Z(0x2e)
};
#undef Z
#define Z(x) cpu_to_be32((x << 27) | (x >> 5))
static const __be32 sbox1[256] = {
Z(0x77), Z(0x14), Z(0xa6), Z(0xfe), Z(0xb2), Z(0x5e), Z(0x8c), Z(0x3e),
Z(0x67), Z(0x6c), Z(0xa1), Z(0x0d), Z(0xc2), Z(0xa2), Z(0xc1), Z(0x85),
Z(0x6c), Z(0x7b), Z(0x67), Z(0xc6), Z(0x23), Z(0xe3), Z(0xf2), Z(0x89),
Z(0x50), Z(0x9c), Z(0x03), Z(0xb7), Z(0x73), Z(0xe6), Z(0xe1), Z(0x39),
Z(0x31), Z(0x2c), Z(0x27), Z(0x9f), Z(0xa5), Z(0x69), Z(0x44), Z(0xd6),
Z(0x23), Z(0x83), Z(0x98), Z(0x7d), Z(0x3c), Z(0xb4), Z(0x2d), Z(0x99),
Z(0x1c), Z(0x1f), Z(0x8c), Z(0x20), Z(0x03), Z(0x7c), Z(0x5f), Z(0xad),
Z(0xf4), Z(0xfa), Z(0x95), Z(0xca), Z(0x76), Z(0x44), Z(0xcd), Z(0xb6),
Z(0xb8), Z(0xa1), Z(0xa1), Z(0xbe), Z(0x9e), Z(0x54), Z(0x8f), Z(0x0b),
Z(0x16), Z(0x74), Z(0x31), Z(0x8a), Z(0x23), Z(0x17), Z(0x04), Z(0xfa),
Z(0x79), Z(0x84), Z(0xb1), Z(0xf5), Z(0x13), Z(0xab), Z(0xb5), Z(0x2e),
Z(0xaa), Z(0x0c), Z(0x60), Z(0x6b), Z(0x5b), Z(0xc4), Z(0x4b), Z(0xbc),
Z(0xe2), Z(0xaf), Z(0x45), Z(0x73), Z(0xfa), Z(0xc9), Z(0x49), Z(0xcd),
Z(0x00), Z(0x92), Z(0x7d), Z(0x97), Z(0x7a), Z(0x18), Z(0x60), Z(0x3d),
Z(0xcf), Z(0x5b), Z(0xde), Z(0xc6), Z(0xe2), Z(0xe6), Z(0xbb), Z(0x8b),
Z(0x06), Z(0xda), Z(0x08), Z(0x15), Z(0x1b), Z(0x88), Z(0x6a), Z(0x17),
Z(0x89), Z(0xd0), Z(0xa9), Z(0xc1), Z(0xc9), Z(0x70), Z(0x6b), Z(0xe5),
Z(0x43), Z(0xf4), Z(0x68), Z(0xc8), Z(0xd3), Z(0x84), Z(0x28), Z(0x0a),
Z(0x52), Z(0x66), Z(0xa3), Z(0xca), Z(0xf2), Z(0xe3), Z(0x7f), Z(0x7a),
Z(0x31), Z(0xf7), Z(0x88), Z(0x94), Z(0x5e), Z(0x9c), Z(0x63), Z(0xd5),
Z(0x24), Z(0x66), Z(0xfc), Z(0xb3), Z(0x57), Z(0x25), Z(0xbe), Z(0x89),
Z(0x44), Z(0xc4), Z(0xe0), Z(0x8f), Z(0x23), Z(0x3c), Z(0x12), Z(0x52),
Z(0xf5), Z(0x1e), Z(0xf4), Z(0xcb), Z(0x18), Z(0x33), Z(0x1f), Z(0xf8),
Z(0x69), Z(0x10), Z(0x9d), Z(0xd3), Z(0xf7), Z(0x28), Z(0xf8), Z(0x30),
Z(0x05), Z(0x5e), Z(0x32), Z(0xc0), Z(0xd5), Z(0x19), Z(0xbd), Z(0x45),
Z(0x8b), Z(0x5b), Z(0xfd), Z(0xbc), Z(0xe2), Z(0x5c), Z(0xa9), Z(0x96),
Z(0xef), Z(0x70), Z(0xcf), Z(0xc2), Z(0x2a), Z(0xb3), Z(0x61), Z(0xad),
Z(0x80), Z(0x48), Z(0x81), Z(0xb7), Z(0x1d), Z(0x43), Z(0xd9), Z(0xd7),
Z(0x45), Z(0xf0), Z(0xd8), Z(0x8a), Z(0x59), Z(0x7c), Z(0x57), Z(0xc1),
Z(0x79), Z(0xc7), Z(0x34), Z(0xd6), Z(0x43), Z(0xdf), Z(0xe4), Z(0x78),
Z(0x16), Z(0x06), Z(0xda), Z(0x92), Z(0x76), Z(0x51), Z(0xe1), Z(0xd4),
Z(0x70), Z(0x03), Z(0xe0), Z(0x2f), Z(0x96), Z(0x91), Z(0x82), Z(0x80)
};
#undef Z
#define Z(x) cpu_to_be32(x << 11)
static const __be32 sbox2[256] = {
Z(0xf0), Z(0x37), Z(0x24), Z(0x53), Z(0x2a), Z(0x03), Z(0x83), Z(0x86),
Z(0xd1), Z(0xec), Z(0x50), Z(0xf0), Z(0x42), Z(0x78), Z(0x2f), Z(0x6d),
Z(0xbf), Z(0x80), Z(0x87), Z(0x27), Z(0x95), Z(0xe2), Z(0xc5), Z(0x5d),
Z(0xf9), Z(0x6f), Z(0xdb), Z(0xb4), Z(0x65), Z(0x6e), Z(0xe7), Z(0x24),
Z(0xc8), Z(0x1a), Z(0xbb), Z(0x49), Z(0xb5), Z(0x0a), Z(0x7d), Z(0xb9),
Z(0xe8), Z(0xdc), Z(0xb7), Z(0xd9), Z(0x45), Z(0x20), Z(0x1b), Z(0xce),
Z(0x59), Z(0x9d), Z(0x6b), Z(0xbd), Z(0x0e), Z(0x8f), Z(0xa3), Z(0xa9),
Z(0xbc), Z(0x74), Z(0xa6), Z(0xf6), Z(0x7f), Z(0x5f), Z(0xb1), Z(0x68),
Z(0x84), Z(0xbc), Z(0xa9), Z(0xfd), Z(0x55), Z(0x50), Z(0xe9), Z(0xb6),
Z(0x13), Z(0x5e), Z(0x07), Z(0xb8), Z(0x95), Z(0x02), Z(0xc0), Z(0xd0),
Z(0x6a), Z(0x1a), Z(0x85), Z(0xbd), Z(0xb6), Z(0xfd), Z(0xfe), Z(0x17),
Z(0x3f), Z(0x09), Z(0xa3), Z(0x8d), Z(0xfb), Z(0xed), Z(0xda), Z(0x1d),
Z(0x6d), Z(0x1c), Z(0x6c), Z(0x01), Z(0x5a), Z(0xe5), Z(0x71), Z(0x3e),
Z(0x8b), Z(0x6b), Z(0xbe), Z(0x29), Z(0xeb), Z(0x12), Z(0x19), Z(0x34),
Z(0xcd), Z(0xb3), Z(0xbd), Z(0x35), Z(0xea), Z(0x4b), Z(0xd5), Z(0xae),
Z(0x2a), Z(0x79), Z(0x5a), Z(0xa5), Z(0x32), Z(0x12), Z(0x7b), Z(0xdc),
Z(0x2c), Z(0xd0), Z(0x22), Z(0x4b), Z(0xb1), Z(0x85), Z(0x59), Z(0x80),
Z(0xc0), Z(0x30), Z(0x9f), Z(0x73), Z(0xd3), Z(0x14), Z(0x48), Z(0x40),
Z(0x07), Z(0x2d), Z(0x8f), Z(0x80), Z(0x0f), Z(0xce), Z(0x0b), Z(0x5e),
Z(0xb7), Z(0x5e), Z(0xac), Z(0x24), Z(0x94), Z(0x4a), Z(0x18), Z(0x15),
Z(0x05), Z(0xe8), Z(0x02), Z(0x77), Z(0xa9), Z(0xc7), Z(0x40), Z(0x45),
Z(0x89), Z(0xd1), Z(0xea), Z(0xde), Z(0x0c), Z(0x79), Z(0x2a), Z(0x99),
Z(0x6c), Z(0x3e), Z(0x95), Z(0xdd), Z(0x8c), Z(0x7d), Z(0xad), Z(0x6f),
Z(0xdc), Z(0xff), Z(0xfd), Z(0x62), Z(0x47), Z(0xb3), Z(0x21), Z(0x8a),
Z(0xec), Z(0x8e), Z(0x19), Z(0x18), Z(0xb4), Z(0x6e), Z(0x3d), Z(0xfd),
Z(0x74), Z(0x54), Z(0x1e), Z(0x04), Z(0x85), Z(0xd8), Z(0xbc), Z(0x1f),
Z(0x56), Z(0xe7), Z(0x3a), Z(0x56), Z(0x67), Z(0xd6), Z(0xc8), Z(0xa5),
Z(0xf3), Z(0x8e), Z(0xde), Z(0xae), Z(0x37), Z(0x49), Z(0xb7), Z(0xfa),
Z(0xc8), Z(0xf4), Z(0x1f), Z(0xe0), Z(0x2a), Z(0x9b), Z(0x15), Z(0xd1),
Z(0x34), Z(0x0e), Z(0xb5), Z(0xe0), Z(0x44), Z(0x78), Z(0x84), Z(0x59),
Z(0x56), Z(0x68), Z(0x77), Z(0xa5), Z(0x14), Z(0x06), Z(0xf5), Z(0x2f),
Z(0x8c), Z(0x8a), Z(0x73), Z(0x80), Z(0x76), Z(0xb4), Z(0x10), Z(0x86)
};
#undef Z
#define Z(x) cpu_to_be32(x << 19)
static const __be32 sbox3[256] = {
Z(0xa9), Z(0x2a), Z(0x48), Z(0x51), Z(0x84), Z(0x7e), Z(0x49), Z(0xe2),
Z(0xb5), Z(0xb7), Z(0x42), Z(0x33), Z(0x7d), Z(0x5d), Z(0xa6), Z(0x12),
Z(0x44), Z(0x48), Z(0x6d), Z(0x28), Z(0xaa), Z(0x20), Z(0x6d), Z(0x57),
Z(0xd6), Z(0x6b), Z(0x5d), Z(0x72), Z(0xf0), Z(0x92), Z(0x5a), Z(0x1b),
Z(0x53), Z(0x80), Z(0x24), Z(0x70), Z(0x9a), Z(0xcc), Z(0xa7), Z(0x66),
Z(0xa1), Z(0x01), Z(0xa5), Z(0x41), Z(0x97), Z(0x41), Z(0x31), Z(0x82),
Z(0xf1), Z(0x14), Z(0xcf), Z(0x53), Z(0x0d), Z(0xa0), Z(0x10), Z(0xcc),
Z(0x2a), Z(0x7d), Z(0xd2), Z(0xbf), Z(0x4b), Z(0x1a), Z(0xdb), Z(0x16),
Z(0x47), Z(0xf6), Z(0x51), Z(0x36), Z(0xed), Z(0xf3), Z(0xb9), Z(0x1a),
Z(0xa7), Z(0xdf), Z(0x29), Z(0x43), Z(0x01), Z(0x54), Z(0x70), Z(0xa4),
Z(0xbf), Z(0xd4), Z(0x0b), Z(0x53), Z(0x44), Z(0x60), Z(0x9e), Z(0x23),
Z(0xa1), Z(0x18), Z(0x68), Z(0x4f), Z(0xf0), Z(0x2f), Z(0x82), Z(0xc2),
Z(0x2a), Z(0x41), Z(0xb2), Z(0x42), Z(0x0c), Z(0xed), Z(0x0c), Z(0x1d),
Z(0x13), Z(0x3a), Z(0x3c), Z(0x6e), Z(0x35), Z(0xdc), Z(0x60), Z(0x65),
Z(0x85), Z(0xe9), Z(0x64), Z(0x02), Z(0x9a), Z(0x3f), Z(0x9f), Z(0x87),
Z(0x96), Z(0xdf), Z(0xbe), Z(0xf2), Z(0xcb), Z(0xe5), Z(0x6c), Z(0xd4),
Z(0x5a), Z(0x83), Z(0xbf), Z(0x92), Z(0x1b), Z(0x94), Z(0x00), Z(0x42),
Z(0xcf), Z(0x4b), Z(0x00), Z(0x75), Z(0xba), Z(0x8f), Z(0x76), Z(0x5f),
Z(0x5d), Z(0x3a), Z(0x4d), Z(0x09), Z(0x12), Z(0x08), Z(0x38), Z(0x95),
Z(0x17), Z(0xe4), Z(0x01), Z(0x1d), Z(0x4c), Z(0xa9), Z(0xcc), Z(0x85),
Z(0x82), Z(0x4c), Z(0x9d), Z(0x2f), Z(0x3b), Z(0x66), Z(0xa1), Z(0x34),
Z(0x10), Z(0xcd), Z(0x59), Z(0x89), Z(0xa5), Z(0x31), Z(0xcf), Z(0x05),
Z(0xc8), Z(0x84), Z(0xfa), Z(0xc7), Z(0xba), Z(0x4e), Z(0x8b), Z(0x1a),
Z(0x19), Z(0xf1), Z(0xa1), Z(0x3b), Z(0x18), Z(0x12), Z(0x17), Z(0xb0),
Z(0x98), Z(0x8d), Z(0x0b), Z(0x23), Z(0xc3), Z(0x3a), Z(0x2d), Z(0x20),
Z(0xdf), Z(0x13), Z(0xa0), Z(0xa8), Z(0x4c), Z(0x0d), Z(0x6c), Z(0x2f),
Z(0x47), Z(0x13), Z(0x13), Z(0x52), Z(0x1f), Z(0x2d), Z(0xf5), Z(0x79),
Z(0x3d), Z(0xa2), Z(0x54), Z(0xbd), Z(0x69), Z(0xc8), Z(0x6b), Z(0xf3),
Z(0x05), Z(0x28), Z(0xf1), Z(0x16), Z(0x46), Z(0x40), Z(0xb0), Z(0x11),
Z(0xd3), Z(0xb7), Z(0x95), Z(0x49), Z(0xcf), Z(0xc3), Z(0x1d), Z(0x8f),
Z(0xd8), Z(0xe1), Z(0x73), Z(0xdb), Z(0xad), Z(0xc8), Z(0xc9), Z(0xa9),
Z(0xa1), Z(0xc2), Z(0xc5), Z(0xe3), Z(0xba), Z(0xfc), Z(0x0e), Z(0x25)
};
/*
* This is a 16 round Feistel network with permutation F_ENCRYPT
*/
#define F_ENCRYPT(R, L, sched) \
do { \
union lc4 { __be32 l; u8 c[4]; } u; \
u.l = sched ^ R; \
L ^= sbox0[u.c[0]] ^ sbox1[u.c[1]] ^ sbox2[u.c[2]] ^ sbox3[u.c[3]]; \
} while (0)
/*
* encryptor
*/
static void fcrypt_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
const struct fcrypt_ctx *ctx = crypto_tfm_ctx(tfm);
struct {
__be32 l, r;
} X;
memcpy(&X, src, sizeof(X));
F_ENCRYPT(X.r, X.l, ctx->sched[0x0]);
F_ENCRYPT(X.l, X.r, ctx->sched[0x1]);
F_ENCRYPT(X.r, X.l, ctx->sched[0x2]);
F_ENCRYPT(X.l, X.r, ctx->sched[0x3]);
F_ENCRYPT(X.r, X.l, ctx->sched[0x4]);
F_ENCRYPT(X.l, X.r, ctx->sched[0x5]);
F_ENCRYPT(X.r, X.l, ctx->sched[0x6]);
F_ENCRYPT(X.l, X.r, ctx->sched[0x7]);
F_ENCRYPT(X.r, X.l, ctx->sched[0x8]);
F_ENCRYPT(X.l, X.r, ctx->sched[0x9]);
F_ENCRYPT(X.r, X.l, ctx->sched[0xa]);
F_ENCRYPT(X.l, X.r, ctx->sched[0xb]);
F_ENCRYPT(X.r, X.l, ctx->sched[0xc]);
F_ENCRYPT(X.l, X.r, ctx->sched[0xd]);
F_ENCRYPT(X.r, X.l, ctx->sched[0xe]);
F_ENCRYPT(X.l, X.r, ctx->sched[0xf]);
memcpy(dst, &X, sizeof(X));
}
/*
* decryptor
*/
static void fcrypt_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
{
const struct fcrypt_ctx *ctx = crypto_tfm_ctx(tfm);
struct {
__be32 l, r;
} X;
memcpy(&X, src, sizeof(X));
F_ENCRYPT(X.l, X.r, ctx->sched[0xf]);
F_ENCRYPT(X.r, X.l, ctx->sched[0xe]);
F_ENCRYPT(X.l, X.r, ctx->sched[0xd]);
F_ENCRYPT(X.r, X.l, ctx->sched[0xc]);
F_ENCRYPT(X.l, X.r, ctx->sched[0xb]);
F_ENCRYPT(X.r, X.l, ctx->sched[0xa]);
F_ENCRYPT(X.l, X.r, ctx->sched[0x9]);
F_ENCRYPT(X.r, X.l, ctx->sched[0x8]);
F_ENCRYPT(X.l, X.r, ctx->sched[0x7]);
F_ENCRYPT(X.r, X.l, ctx->sched[0x6]);
F_ENCRYPT(X.l, X.r, ctx->sched[0x5]);
F_ENCRYPT(X.r, X.l, ctx->sched[0x4]);
F_ENCRYPT(X.l, X.r, ctx->sched[0x3]);
F_ENCRYPT(X.r, X.l, ctx->sched[0x2]);
F_ENCRYPT(X.l, X.r, ctx->sched[0x1]);
F_ENCRYPT(X.r, X.l, ctx->sched[0x0]);
memcpy(dst, &X, sizeof(X));
}
/*
* Generate a key schedule from key, the least significant bit in each key byte
* is parity and shall be ignored. This leaves 56 significant bits in the key
* to scatter over the 16 key schedules. For each schedule extract the low
* order 32 bits and use as schedule, then rotate right by 11 bits.
*/
static int fcrypt_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
{
struct fcrypt_ctx *ctx = crypto_tfm_ctx(tfm);
#if BITS_PER_LONG == 64 /* the 64-bit version can also be used for 32-bit
* kernels - it seems to be faster but the code is
* larger */
u64 k; /* k holds all 56 non-parity bits */
/* discard the parity bits */
k = (*key++) >> 1;
k <<= 7;
k |= (*key++) >> 1;
k <<= 7;
k |= (*key++) >> 1;
k <<= 7;
k |= (*key++) >> 1;
k <<= 7;
k |= (*key++) >> 1;
k <<= 7;
k |= (*key++) >> 1;
k <<= 7;
k |= (*key++) >> 1;
k <<= 7;
k |= (*key) >> 1;
/* Use lower 32 bits for schedule, rotate by 11 each round (16 times) */
ctx->sched[0x0] = cpu_to_be32(k); ror56_64(k, 11);
ctx->sched[0x1] = cpu_to_be32(k); ror56_64(k, 11);
ctx->sched[0x2] = cpu_to_be32(k); ror56_64(k, 11);
ctx->sched[0x3] = cpu_to_be32(k); ror56_64(k, 11);
ctx->sched[0x4] = cpu_to_be32(k); ror56_64(k, 11);
ctx->sched[0x5] = cpu_to_be32(k); ror56_64(k, 11);
ctx->sched[0x6] = cpu_to_be32(k); ror56_64(k, 11);
ctx->sched[0x7] = cpu_to_be32(k); ror56_64(k, 11);
ctx->sched[0x8] = cpu_to_be32(k); ror56_64(k, 11);
ctx->sched[0x9] = cpu_to_be32(k); ror56_64(k, 11);
ctx->sched[0xa] = cpu_to_be32(k); ror56_64(k, 11);
ctx->sched[0xb] = cpu_to_be32(k); ror56_64(k, 11);
ctx->sched[0xc] = cpu_to_be32(k); ror56_64(k, 11);
ctx->sched[0xd] = cpu_to_be32(k); ror56_64(k, 11);
ctx->sched[0xe] = cpu_to_be32(k); ror56_64(k, 11);
ctx->sched[0xf] = cpu_to_be32(k);
return 0;
#else
u32 hi, lo; /* hi is upper 24 bits and lo lower 32, total 56 */
/* discard the parity bits */
lo = (*key++) >> 1;
lo <<= 7;
lo |= (*key++) >> 1;
lo <<= 7;
lo |= (*key++) >> 1;
lo <<= 7;
lo |= (*key++) >> 1;
hi = lo >> 4;
lo &= 0xf;
lo <<= 7;
lo |= (*key++) >> 1;
lo <<= 7;
lo |= (*key++) >> 1;
lo <<= 7;
lo |= (*key++) >> 1;
lo <<= 7;
lo |= (*key) >> 1;
/* Use lower 32 bits for schedule, rotate by 11 each round (16 times) */
ctx->sched[0x0] = cpu_to_be32(lo); ror56(hi, lo, 11);
ctx->sched[0x1] = cpu_to_be32(lo); ror56(hi, lo, 11);
ctx->sched[0x2] = cpu_to_be32(lo); ror56(hi, lo, 11);
ctx->sched[0x3] = cpu_to_be32(lo); ror56(hi, lo, 11);
ctx->sched[0x4] = cpu_to_be32(lo); ror56(hi, lo, 11);
ctx->sched[0x5] = cpu_to_be32(lo); ror56(hi, lo, 11);
ctx->sched[0x6] = cpu_to_be32(lo); ror56(hi, lo, 11);
ctx->sched[0x7] = cpu_to_be32(lo); ror56(hi, lo, 11);
ctx->sched[0x8] = cpu_to_be32(lo); ror56(hi, lo, 11);
ctx->sched[0x9] = cpu_to_be32(lo); ror56(hi, lo, 11);
ctx->sched[0xa] = cpu_to_be32(lo); ror56(hi, lo, 11);
ctx->sched[0xb] = cpu_to_be32(lo); ror56(hi, lo, 11);
ctx->sched[0xc] = cpu_to_be32(lo); ror56(hi, lo, 11);
ctx->sched[0xd] = cpu_to_be32(lo); ror56(hi, lo, 11);
ctx->sched[0xe] = cpu_to_be32(lo); ror56(hi, lo, 11);
ctx->sched[0xf] = cpu_to_be32(lo);
return 0;
#endif
}
static struct crypto_alg fcrypt_alg = {
.cra_name = "fcrypt",
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
.cra_blocksize = 8,
.cra_ctxsize = sizeof(struct fcrypt_ctx),
.cra_module = THIS_MODULE,
.cra_alignmask = 3,
.cra_u = { .cipher = {
.cia_min_keysize = 8,
.cia_max_keysize = 8,
.cia_setkey = fcrypt_setkey,
.cia_encrypt = fcrypt_encrypt,
.cia_decrypt = fcrypt_decrypt } }
};
static int __init fcrypt_mod_init(void)
{
return crypto_register_alg(&fcrypt_alg);
}
static void __exit fcrypt_mod_fini(void)
{
crypto_unregister_alg(&fcrypt_alg);
}
module_init(fcrypt_mod_init);
module_exit(fcrypt_mod_fini);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("FCrypt Cipher Algorithm");
MODULE_AUTHOR("David Howells <dhowells@redhat.com>");
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