| 1 |
62 |
marcus.erl |
/* FCrypt encryption algorithm
|
| 2 |
|
|
*
|
| 3 |
|
|
* Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
|
| 4 |
|
|
* Written by David Howells (dhowells@redhat.com)
|
| 5 |
|
|
*
|
| 6 |
|
|
* This program is free software; you can redistribute it and/or
|
| 7 |
|
|
* modify it under the terms of the GNU General Public License
|
| 8 |
|
|
* as published by the Free Software Foundation; either version
|
| 9 |
|
|
* 2 of the License, or (at your option) any later version.
|
| 10 |
|
|
*
|
| 11 |
|
|
* Based on code:
|
| 12 |
|
|
*
|
| 13 |
|
|
* Copyright (c) 1995 - 2000 Kungliga Tekniska Högskolan
|
| 14 |
|
|
* (Royal Institute of Technology, Stockholm, Sweden).
|
| 15 |
|
|
* All rights reserved.
|
| 16 |
|
|
*
|
| 17 |
|
|
* Redistribution and use in source and binary forms, with or without
|
| 18 |
|
|
* modification, are permitted provided that the following conditions
|
| 19 |
|
|
* are met:
|
| 20 |
|
|
*
|
| 21 |
|
|
* 1. Redistributions of source code must retain the above copyright
|
| 22 |
|
|
* notice, this list of conditions and the following disclaimer.
|
| 23 |
|
|
*
|
| 24 |
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
| 25 |
|
|
* notice, this list of conditions and the following disclaimer in the
|
| 26 |
|
|
* documentation and/or other materials provided with the distribution.
|
| 27 |
|
|
*
|
| 28 |
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
| 29 |
|
|
* may be used to endorse or promote products derived from this software
|
| 30 |
|
|
* without specific prior written permission.
|
| 31 |
|
|
*
|
| 32 |
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
| 33 |
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
| 34 |
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
| 35 |
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
| 36 |
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
| 37 |
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
| 38 |
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
| 39 |
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
| 40 |
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
| 41 |
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
| 42 |
|
|
* SUCH DAMAGE.
|
| 43 |
|
|
*/
|
| 44 |
|
|
|
| 45 |
|
|
#include <asm/byteorder.h>
|
| 46 |
|
|
#include <linux/bitops.h>
|
| 47 |
|
|
#include <linux/init.h>
|
| 48 |
|
|
#include <linux/module.h>
|
| 49 |
|
|
#include <linux/crypto.h>
|
| 50 |
|
|
|
| 51 |
|
|
#define ROUNDS 16
|
| 52 |
|
|
|
| 53 |
|
|
struct fcrypt_ctx {
|
| 54 |
|
|
__be32 sched[ROUNDS];
|
| 55 |
|
|
};
|
| 56 |
|
|
|
| 57 |
|
|
/* Rotate right two 32 bit numbers as a 56 bit number */
|
| 58 |
|
|
#define ror56(hi, lo, n) \
|
| 59 |
|
|
do { \
|
| 60 |
|
|
u32 t = lo & ((1 << n) - 1); \
|
| 61 |
|
|
lo = (lo >> n) | ((hi & ((1 << n) - 1)) << (32 - n)); \
|
| 62 |
|
|
hi = (hi >> n) | (t << (24-n)); \
|
| 63 |
|
|
} while(0)
|
| 64 |
|
|
|
| 65 |
|
|
/* Rotate right one 64 bit number as a 56 bit number */
|
| 66 |
|
|
#define ror56_64(k, n) \
|
| 67 |
|
|
do { \
|
| 68 |
|
|
k = (k >> n) | ((k & ((1 << n) - 1)) << (56 - n)); \
|
| 69 |
|
|
} while(0)
|
| 70 |
|
|
|
| 71 |
|
|
/*
|
| 72 |
|
|
* Sboxes for Feistel network derived from
|
| 73 |
|
|
* /afs/transarc.com/public/afsps/afs.rel31b.export-src/rxkad/sboxes.h
|
| 74 |
|
|
*/
|
| 75 |
|
|
#undef Z
|
| 76 |
|
|
#define Z(x) __constant_cpu_to_be32(x << 3)
|
| 77 |
|
|
static const __be32 sbox0[256] = {
|
| 78 |
|
|
Z(0xea), Z(0x7f), Z(0xb2), Z(0x64), Z(0x9d), Z(0xb0), Z(0xd9), Z(0x11),
|
| 79 |
|
|
Z(0xcd), Z(0x86), Z(0x86), Z(0x91), Z(0x0a), Z(0xb2), Z(0x93), Z(0x06),
|
| 80 |
|
|
Z(0x0e), Z(0x06), Z(0xd2), Z(0x65), Z(0x73), Z(0xc5), Z(0x28), Z(0x60),
|
| 81 |
|
|
Z(0xf2), Z(0x20), Z(0xb5), Z(0x38), Z(0x7e), Z(0xda), Z(0x9f), Z(0xe3),
|
| 82 |
|
|
Z(0xd2), Z(0xcf), Z(0xc4), Z(0x3c), Z(0x61), Z(0xff), Z(0x4a), Z(0x4a),
|
| 83 |
|
|
Z(0x35), Z(0xac), Z(0xaa), Z(0x5f), Z(0x2b), Z(0xbb), Z(0xbc), Z(0x53),
|
| 84 |
|
|
Z(0x4e), Z(0x9d), Z(0x78), Z(0xa3), Z(0xdc), Z(0x09), Z(0x32), Z(0x10),
|
| 85 |
|
|
Z(0xc6), Z(0x6f), Z(0x66), Z(0xd6), Z(0xab), Z(0xa9), Z(0xaf), Z(0xfd),
|
| 86 |
|
|
Z(0x3b), Z(0x95), Z(0xe8), Z(0x34), Z(0x9a), Z(0x81), Z(0x72), Z(0x80),
|
| 87 |
|
|
Z(0x9c), Z(0xf3), Z(0xec), Z(0xda), Z(0x9f), Z(0x26), Z(0x76), Z(0x15),
|
| 88 |
|
|
Z(0x3e), Z(0x55), Z(0x4d), Z(0xde), Z(0x84), Z(0xee), Z(0xad), Z(0xc7),
|
| 89 |
|
|
Z(0xf1), Z(0x6b), Z(0x3d), Z(0xd3), Z(0x04), Z(0x49), Z(0xaa), Z(0x24),
|
| 90 |
|
|
Z(0x0b), Z(0x8a), Z(0x83), Z(0xba), Z(0xfa), Z(0x85), Z(0xa0), Z(0xa8),
|
| 91 |
|
|
Z(0xb1), Z(0xd4), Z(0x01), Z(0xd8), Z(0x70), Z(0x64), Z(0xf0), Z(0x51),
|
| 92 |
|
|
Z(0xd2), Z(0xc3), Z(0xa7), Z(0x75), Z(0x8c), Z(0xa5), Z(0x64), Z(0xef),
|
| 93 |
|
|
Z(0x10), Z(0x4e), Z(0xb7), Z(0xc6), Z(0x61), Z(0x03), Z(0xeb), Z(0x44),
|
| 94 |
|
|
Z(0x3d), Z(0xe5), Z(0xb3), Z(0x5b), Z(0xae), Z(0xd5), Z(0xad), Z(0x1d),
|
| 95 |
|
|
Z(0xfa), Z(0x5a), Z(0x1e), Z(0x33), Z(0xab), Z(0x93), Z(0xa2), Z(0xb7),
|
| 96 |
|
|
Z(0xe7), Z(0xa8), Z(0x45), Z(0xa4), Z(0xcd), Z(0x29), Z(0x63), Z(0x44),
|
| 97 |
|
|
Z(0xb6), Z(0x69), Z(0x7e), Z(0x2e), Z(0x62), Z(0x03), Z(0xc8), Z(0xe0),
|
| 98 |
|
|
Z(0x17), Z(0xbb), Z(0xc7), Z(0xf3), Z(0x3f), Z(0x36), Z(0xba), Z(0x71),
|
| 99 |
|
|
Z(0x8e), Z(0x97), Z(0x65), Z(0x60), Z(0x69), Z(0xb6), Z(0xf6), Z(0xe6),
|
| 100 |
|
|
Z(0x6e), Z(0xe0), Z(0x81), Z(0x59), Z(0xe8), Z(0xaf), Z(0xdd), Z(0x95),
|
| 101 |
|
|
Z(0x22), Z(0x99), Z(0xfd), Z(0x63), Z(0x19), Z(0x74), Z(0x61), Z(0xb1),
|
| 102 |
|
|
Z(0xb6), Z(0x5b), Z(0xae), Z(0x54), Z(0xb3), Z(0x70), Z(0xff), Z(0xc6),
|
| 103 |
|
|
Z(0x3b), Z(0x3e), Z(0xc1), Z(0xd7), Z(0xe1), Z(0x0e), Z(0x76), Z(0xe5),
|
| 104 |
|
|
Z(0x36), Z(0x4f), Z(0x59), Z(0xc7), Z(0x08), Z(0x6e), Z(0x82), Z(0xa6),
|
| 105 |
|
|
Z(0x93), Z(0xc4), Z(0xaa), Z(0x26), Z(0x49), Z(0xe0), Z(0x21), Z(0x64),
|
| 106 |
|
|
Z(0x07), Z(0x9f), Z(0x64), Z(0x81), Z(0x9c), Z(0xbf), Z(0xf9), Z(0xd1),
|
| 107 |
|
|
Z(0x43), Z(0xf8), Z(0xb6), Z(0xb9), Z(0xf1), Z(0x24), Z(0x75), Z(0x03),
|
| 108 |
|
|
Z(0xe4), Z(0xb0), Z(0x99), Z(0x46), Z(0x3d), Z(0xf5), Z(0xd1), Z(0x39),
|
| 109 |
|
|
Z(0x72), Z(0x12), Z(0xf6), Z(0xba), Z(0x0c), Z(0x0d), Z(0x42), Z(0x2e)
|
| 110 |
|
|
};
|
| 111 |
|
|
|
| 112 |
|
|
#undef Z
|
| 113 |
|
|
#define Z(x) __constant_cpu_to_be32((x << 27) | (x >> 5))
|
| 114 |
|
|
static const __be32 sbox1[256] = {
|
| 115 |
|
|
Z(0x77), Z(0x14), Z(0xa6), Z(0xfe), Z(0xb2), Z(0x5e), Z(0x8c), Z(0x3e),
|
| 116 |
|
|
Z(0x67), Z(0x6c), Z(0xa1), Z(0x0d), Z(0xc2), Z(0xa2), Z(0xc1), Z(0x85),
|
| 117 |
|
|
Z(0x6c), Z(0x7b), Z(0x67), Z(0xc6), Z(0x23), Z(0xe3), Z(0xf2), Z(0x89),
|
| 118 |
|
|
Z(0x50), Z(0x9c), Z(0x03), Z(0xb7), Z(0x73), Z(0xe6), Z(0xe1), Z(0x39),
|
| 119 |
|
|
Z(0x31), Z(0x2c), Z(0x27), Z(0x9f), Z(0xa5), Z(0x69), Z(0x44), Z(0xd6),
|
| 120 |
|
|
Z(0x23), Z(0x83), Z(0x98), Z(0x7d), Z(0x3c), Z(0xb4), Z(0x2d), Z(0x99),
|
| 121 |
|
|
Z(0x1c), Z(0x1f), Z(0x8c), Z(0x20), Z(0x03), Z(0x7c), Z(0x5f), Z(0xad),
|
| 122 |
|
|
Z(0xf4), Z(0xfa), Z(0x95), Z(0xca), Z(0x76), Z(0x44), Z(0xcd), Z(0xb6),
|
| 123 |
|
|
Z(0xb8), Z(0xa1), Z(0xa1), Z(0xbe), Z(0x9e), Z(0x54), Z(0x8f), Z(0x0b),
|
| 124 |
|
|
Z(0x16), Z(0x74), Z(0x31), Z(0x8a), Z(0x23), Z(0x17), Z(0x04), Z(0xfa),
|
| 125 |
|
|
Z(0x79), Z(0x84), Z(0xb1), Z(0xf5), Z(0x13), Z(0xab), Z(0xb5), Z(0x2e),
|
| 126 |
|
|
Z(0xaa), Z(0x0c), Z(0x60), Z(0x6b), Z(0x5b), Z(0xc4), Z(0x4b), Z(0xbc),
|
| 127 |
|
|
Z(0xe2), Z(0xaf), Z(0x45), Z(0x73), Z(0xfa), Z(0xc9), Z(0x49), Z(0xcd),
|
| 128 |
|
|
Z(0x00), Z(0x92), Z(0x7d), Z(0x97), Z(0x7a), Z(0x18), Z(0x60), Z(0x3d),
|
| 129 |
|
|
Z(0xcf), Z(0x5b), Z(0xde), Z(0xc6), Z(0xe2), Z(0xe6), Z(0xbb), Z(0x8b),
|
| 130 |
|
|
Z(0x06), Z(0xda), Z(0x08), Z(0x15), Z(0x1b), Z(0x88), Z(0x6a), Z(0x17),
|
| 131 |
|
|
Z(0x89), Z(0xd0), Z(0xa9), Z(0xc1), Z(0xc9), Z(0x70), Z(0x6b), Z(0xe5),
|
| 132 |
|
|
Z(0x43), Z(0xf4), Z(0x68), Z(0xc8), Z(0xd3), Z(0x84), Z(0x28), Z(0x0a),
|
| 133 |
|
|
Z(0x52), Z(0x66), Z(0xa3), Z(0xca), Z(0xf2), Z(0xe3), Z(0x7f), Z(0x7a),
|
| 134 |
|
|
Z(0x31), Z(0xf7), Z(0x88), Z(0x94), Z(0x5e), Z(0x9c), Z(0x63), Z(0xd5),
|
| 135 |
|
|
Z(0x24), Z(0x66), Z(0xfc), Z(0xb3), Z(0x57), Z(0x25), Z(0xbe), Z(0x89),
|
| 136 |
|
|
Z(0x44), Z(0xc4), Z(0xe0), Z(0x8f), Z(0x23), Z(0x3c), Z(0x12), Z(0x52),
|
| 137 |
|
|
Z(0xf5), Z(0x1e), Z(0xf4), Z(0xcb), Z(0x18), Z(0x33), Z(0x1f), Z(0xf8),
|
| 138 |
|
|
Z(0x69), Z(0x10), Z(0x9d), Z(0xd3), Z(0xf7), Z(0x28), Z(0xf8), Z(0x30),
|
| 139 |
|
|
Z(0x05), Z(0x5e), Z(0x32), Z(0xc0), Z(0xd5), Z(0x19), Z(0xbd), Z(0x45),
|
| 140 |
|
|
Z(0x8b), Z(0x5b), Z(0xfd), Z(0xbc), Z(0xe2), Z(0x5c), Z(0xa9), Z(0x96),
|
| 141 |
|
|
Z(0xef), Z(0x70), Z(0xcf), Z(0xc2), Z(0x2a), Z(0xb3), Z(0x61), Z(0xad),
|
| 142 |
|
|
Z(0x80), Z(0x48), Z(0x81), Z(0xb7), Z(0x1d), Z(0x43), Z(0xd9), Z(0xd7),
|
| 143 |
|
|
Z(0x45), Z(0xf0), Z(0xd8), Z(0x8a), Z(0x59), Z(0x7c), Z(0x57), Z(0xc1),
|
| 144 |
|
|
Z(0x79), Z(0xc7), Z(0x34), Z(0xd6), Z(0x43), Z(0xdf), Z(0xe4), Z(0x78),
|
| 145 |
|
|
Z(0x16), Z(0x06), Z(0xda), Z(0x92), Z(0x76), Z(0x51), Z(0xe1), Z(0xd4),
|
| 146 |
|
|
Z(0x70), Z(0x03), Z(0xe0), Z(0x2f), Z(0x96), Z(0x91), Z(0x82), Z(0x80)
|
| 147 |
|
|
};
|
| 148 |
|
|
|
| 149 |
|
|
#undef Z
|
| 150 |
|
|
#define Z(x) __constant_cpu_to_be32(x << 11)
|
| 151 |
|
|
static const __be32 sbox2[256] = {
|
| 152 |
|
|
Z(0xf0), Z(0x37), Z(0x24), Z(0x53), Z(0x2a), Z(0x03), Z(0x83), Z(0x86),
|
| 153 |
|
|
Z(0xd1), Z(0xec), Z(0x50), Z(0xf0), Z(0x42), Z(0x78), Z(0x2f), Z(0x6d),
|
| 154 |
|
|
Z(0xbf), Z(0x80), Z(0x87), Z(0x27), Z(0x95), Z(0xe2), Z(0xc5), Z(0x5d),
|
| 155 |
|
|
Z(0xf9), Z(0x6f), Z(0xdb), Z(0xb4), Z(0x65), Z(0x6e), Z(0xe7), Z(0x24),
|
| 156 |
|
|
Z(0xc8), Z(0x1a), Z(0xbb), Z(0x49), Z(0xb5), Z(0x0a), Z(0x7d), Z(0xb9),
|
| 157 |
|
|
Z(0xe8), Z(0xdc), Z(0xb7), Z(0xd9), Z(0x45), Z(0x20), Z(0x1b), Z(0xce),
|
| 158 |
|
|
Z(0x59), Z(0x9d), Z(0x6b), Z(0xbd), Z(0x0e), Z(0x8f), Z(0xa3), Z(0xa9),
|
| 159 |
|
|
Z(0xbc), Z(0x74), Z(0xa6), Z(0xf6), Z(0x7f), Z(0x5f), Z(0xb1), Z(0x68),
|
| 160 |
|
|
Z(0x84), Z(0xbc), Z(0xa9), Z(0xfd), Z(0x55), Z(0x50), Z(0xe9), Z(0xb6),
|
| 161 |
|
|
Z(0x13), Z(0x5e), Z(0x07), Z(0xb8), Z(0x95), Z(0x02), Z(0xc0), Z(0xd0),
|
| 162 |
|
|
Z(0x6a), Z(0x1a), Z(0x85), Z(0xbd), Z(0xb6), Z(0xfd), Z(0xfe), Z(0x17),
|
| 163 |
|
|
Z(0x3f), Z(0x09), Z(0xa3), Z(0x8d), Z(0xfb), Z(0xed), Z(0xda), Z(0x1d),
|
| 164 |
|
|
Z(0x6d), Z(0x1c), Z(0x6c), Z(0x01), Z(0x5a), Z(0xe5), Z(0x71), Z(0x3e),
|
| 165 |
|
|
Z(0x8b), Z(0x6b), Z(0xbe), Z(0x29), Z(0xeb), Z(0x12), Z(0x19), Z(0x34),
|
| 166 |
|
|
Z(0xcd), Z(0xb3), Z(0xbd), Z(0x35), Z(0xea), Z(0x4b), Z(0xd5), Z(0xae),
|
| 167 |
|
|
Z(0x2a), Z(0x79), Z(0x5a), Z(0xa5), Z(0x32), Z(0x12), Z(0x7b), Z(0xdc),
|
| 168 |
|
|
Z(0x2c), Z(0xd0), Z(0x22), Z(0x4b), Z(0xb1), Z(0x85), Z(0x59), Z(0x80),
|
| 169 |
|
|
Z(0xc0), Z(0x30), Z(0x9f), Z(0x73), Z(0xd3), Z(0x14), Z(0x48), Z(0x40),
|
| 170 |
|
|
Z(0x07), Z(0x2d), Z(0x8f), Z(0x80), Z(0x0f), Z(0xce), Z(0x0b), Z(0x5e),
|
| 171 |
|
|
Z(0xb7), Z(0x5e), Z(0xac), Z(0x24), Z(0x94), Z(0x4a), Z(0x18), Z(0x15),
|
| 172 |
|
|
Z(0x05), Z(0xe8), Z(0x02), Z(0x77), Z(0xa9), Z(0xc7), Z(0x40), Z(0x45),
|
| 173 |
|
|
Z(0x89), Z(0xd1), Z(0xea), Z(0xde), Z(0x0c), Z(0x79), Z(0x2a), Z(0x99),
|
| 174 |
|
|
Z(0x6c), Z(0x3e), Z(0x95), Z(0xdd), Z(0x8c), Z(0x7d), Z(0xad), Z(0x6f),
|
| 175 |
|
|
Z(0xdc), Z(0xff), Z(0xfd), Z(0x62), Z(0x47), Z(0xb3), Z(0x21), Z(0x8a),
|
| 176 |
|
|
Z(0xec), Z(0x8e), Z(0x19), Z(0x18), Z(0xb4), Z(0x6e), Z(0x3d), Z(0xfd),
|
| 177 |
|
|
Z(0x74), Z(0x54), Z(0x1e), Z(0x04), Z(0x85), Z(0xd8), Z(0xbc), Z(0x1f),
|
| 178 |
|
|
Z(0x56), Z(0xe7), Z(0x3a), Z(0x56), Z(0x67), Z(0xd6), Z(0xc8), Z(0xa5),
|
| 179 |
|
|
Z(0xf3), Z(0x8e), Z(0xde), Z(0xae), Z(0x37), Z(0x49), Z(0xb7), Z(0xfa),
|
| 180 |
|
|
Z(0xc8), Z(0xf4), Z(0x1f), Z(0xe0), Z(0x2a), Z(0x9b), Z(0x15), Z(0xd1),
|
| 181 |
|
|
Z(0x34), Z(0x0e), Z(0xb5), Z(0xe0), Z(0x44), Z(0x78), Z(0x84), Z(0x59),
|
| 182 |
|
|
Z(0x56), Z(0x68), Z(0x77), Z(0xa5), Z(0x14), Z(0x06), Z(0xf5), Z(0x2f),
|
| 183 |
|
|
Z(0x8c), Z(0x8a), Z(0x73), Z(0x80), Z(0x76), Z(0xb4), Z(0x10), Z(0x86)
|
| 184 |
|
|
};
|
| 185 |
|
|
|
| 186 |
|
|
#undef Z
|
| 187 |
|
|
#define Z(x) __constant_cpu_to_be32(x << 19)
|
| 188 |
|
|
static const __be32 sbox3[256] = {
|
| 189 |
|
|
Z(0xa9), Z(0x2a), Z(0x48), Z(0x51), Z(0x84), Z(0x7e), Z(0x49), Z(0xe2),
|
| 190 |
|
|
Z(0xb5), Z(0xb7), Z(0x42), Z(0x33), Z(0x7d), Z(0x5d), Z(0xa6), Z(0x12),
|
| 191 |
|
|
Z(0x44), Z(0x48), Z(0x6d), Z(0x28), Z(0xaa), Z(0x20), Z(0x6d), Z(0x57),
|
| 192 |
|
|
Z(0xd6), Z(0x6b), Z(0x5d), Z(0x72), Z(0xf0), Z(0x92), Z(0x5a), Z(0x1b),
|
| 193 |
|
|
Z(0x53), Z(0x80), Z(0x24), Z(0x70), Z(0x9a), Z(0xcc), Z(0xa7), Z(0x66),
|
| 194 |
|
|
Z(0xa1), Z(0x01), Z(0xa5), Z(0x41), Z(0x97), Z(0x41), Z(0x31), Z(0x82),
|
| 195 |
|
|
Z(0xf1), Z(0x14), Z(0xcf), Z(0x53), Z(0x0d), Z(0xa0), Z(0x10), Z(0xcc),
|
| 196 |
|
|
Z(0x2a), Z(0x7d), Z(0xd2), Z(0xbf), Z(0x4b), Z(0x1a), Z(0xdb), Z(0x16),
|
| 197 |
|
|
Z(0x47), Z(0xf6), Z(0x51), Z(0x36), Z(0xed), Z(0xf3), Z(0xb9), Z(0x1a),
|
| 198 |
|
|
Z(0xa7), Z(0xdf), Z(0x29), Z(0x43), Z(0x01), Z(0x54), Z(0x70), Z(0xa4),
|
| 199 |
|
|
Z(0xbf), Z(0xd4), Z(0x0b), Z(0x53), Z(0x44), Z(0x60), Z(0x9e), Z(0x23),
|
| 200 |
|
|
Z(0xa1), Z(0x18), Z(0x68), Z(0x4f), Z(0xf0), Z(0x2f), Z(0x82), Z(0xc2),
|
| 201 |
|
|
Z(0x2a), Z(0x41), Z(0xb2), Z(0x42), Z(0x0c), Z(0xed), Z(0x0c), Z(0x1d),
|
| 202 |
|
|
Z(0x13), Z(0x3a), Z(0x3c), Z(0x6e), Z(0x35), Z(0xdc), Z(0x60), Z(0x65),
|
| 203 |
|
|
Z(0x85), Z(0xe9), Z(0x64), Z(0x02), Z(0x9a), Z(0x3f), Z(0x9f), Z(0x87),
|
| 204 |
|
|
Z(0x96), Z(0xdf), Z(0xbe), Z(0xf2), Z(0xcb), Z(0xe5), Z(0x6c), Z(0xd4),
|
| 205 |
|
|
Z(0x5a), Z(0x83), Z(0xbf), Z(0x92), Z(0x1b), Z(0x94), Z(0x00), Z(0x42),
|
| 206 |
|
|
Z(0xcf), Z(0x4b), Z(0x00), Z(0x75), Z(0xba), Z(0x8f), Z(0x76), Z(0x5f),
|
| 207 |
|
|
Z(0x5d), Z(0x3a), Z(0x4d), Z(0x09), Z(0x12), Z(0x08), Z(0x38), Z(0x95),
|
| 208 |
|
|
Z(0x17), Z(0xe4), Z(0x01), Z(0x1d), Z(0x4c), Z(0xa9), Z(0xcc), Z(0x85),
|
| 209 |
|
|
Z(0x82), Z(0x4c), Z(0x9d), Z(0x2f), Z(0x3b), Z(0x66), Z(0xa1), Z(0x34),
|
| 210 |
|
|
Z(0x10), Z(0xcd), Z(0x59), Z(0x89), Z(0xa5), Z(0x31), Z(0xcf), Z(0x05),
|
| 211 |
|
|
Z(0xc8), Z(0x84), Z(0xfa), Z(0xc7), Z(0xba), Z(0x4e), Z(0x8b), Z(0x1a),
|
| 212 |
|
|
Z(0x19), Z(0xf1), Z(0xa1), Z(0x3b), Z(0x18), Z(0x12), Z(0x17), Z(0xb0),
|
| 213 |
|
|
Z(0x98), Z(0x8d), Z(0x0b), Z(0x23), Z(0xc3), Z(0x3a), Z(0x2d), Z(0x20),
|
| 214 |
|
|
Z(0xdf), Z(0x13), Z(0xa0), Z(0xa8), Z(0x4c), Z(0x0d), Z(0x6c), Z(0x2f),
|
| 215 |
|
|
Z(0x47), Z(0x13), Z(0x13), Z(0x52), Z(0x1f), Z(0x2d), Z(0xf5), Z(0x79),
|
| 216 |
|
|
Z(0x3d), Z(0xa2), Z(0x54), Z(0xbd), Z(0x69), Z(0xc8), Z(0x6b), Z(0xf3),
|
| 217 |
|
|
Z(0x05), Z(0x28), Z(0xf1), Z(0x16), Z(0x46), Z(0x40), Z(0xb0), Z(0x11),
|
| 218 |
|
|
Z(0xd3), Z(0xb7), Z(0x95), Z(0x49), Z(0xcf), Z(0xc3), Z(0x1d), Z(0x8f),
|
| 219 |
|
|
Z(0xd8), Z(0xe1), Z(0x73), Z(0xdb), Z(0xad), Z(0xc8), Z(0xc9), Z(0xa9),
|
| 220 |
|
|
Z(0xa1), Z(0xc2), Z(0xc5), Z(0xe3), Z(0xba), Z(0xfc), Z(0x0e), Z(0x25)
|
| 221 |
|
|
};
|
| 222 |
|
|
|
| 223 |
|
|
/*
|
| 224 |
|
|
* This is a 16 round Feistel network with permutation F_ENCRYPT
|
| 225 |
|
|
*/
|
| 226 |
|
|
#define F_ENCRYPT(R, L, sched) \
|
| 227 |
|
|
do { \
|
| 228 |
|
|
union lc4 { __be32 l; u8 c[4]; } u; \
|
| 229 |
|
|
u.l = sched ^ R; \
|
| 230 |
|
|
L ^= sbox0[u.c[0]] ^ sbox1[u.c[1]] ^ sbox2[u.c[2]] ^ sbox3[u.c[3]]; \
|
| 231 |
|
|
} while(0)
|
| 232 |
|
|
|
| 233 |
|
|
/*
|
| 234 |
|
|
* encryptor
|
| 235 |
|
|
*/
|
| 236 |
|
|
static void fcrypt_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
|
| 237 |
|
|
{
|
| 238 |
|
|
const struct fcrypt_ctx *ctx = crypto_tfm_ctx(tfm);
|
| 239 |
|
|
struct {
|
| 240 |
|
|
__be32 l, r;
|
| 241 |
|
|
} X;
|
| 242 |
|
|
|
| 243 |
|
|
memcpy(&X, src, sizeof(X));
|
| 244 |
|
|
|
| 245 |
|
|
F_ENCRYPT(X.r, X.l, ctx->sched[0x0]);
|
| 246 |
|
|
F_ENCRYPT(X.l, X.r, ctx->sched[0x1]);
|
| 247 |
|
|
F_ENCRYPT(X.r, X.l, ctx->sched[0x2]);
|
| 248 |
|
|
F_ENCRYPT(X.l, X.r, ctx->sched[0x3]);
|
| 249 |
|
|
F_ENCRYPT(X.r, X.l, ctx->sched[0x4]);
|
| 250 |
|
|
F_ENCRYPT(X.l, X.r, ctx->sched[0x5]);
|
| 251 |
|
|
F_ENCRYPT(X.r, X.l, ctx->sched[0x6]);
|
| 252 |
|
|
F_ENCRYPT(X.l, X.r, ctx->sched[0x7]);
|
| 253 |
|
|
F_ENCRYPT(X.r, X.l, ctx->sched[0x8]);
|
| 254 |
|
|
F_ENCRYPT(X.l, X.r, ctx->sched[0x9]);
|
| 255 |
|
|
F_ENCRYPT(X.r, X.l, ctx->sched[0xa]);
|
| 256 |
|
|
F_ENCRYPT(X.l, X.r, ctx->sched[0xb]);
|
| 257 |
|
|
F_ENCRYPT(X.r, X.l, ctx->sched[0xc]);
|
| 258 |
|
|
F_ENCRYPT(X.l, X.r, ctx->sched[0xd]);
|
| 259 |
|
|
F_ENCRYPT(X.r, X.l, ctx->sched[0xe]);
|
| 260 |
|
|
F_ENCRYPT(X.l, X.r, ctx->sched[0xf]);
|
| 261 |
|
|
|
| 262 |
|
|
memcpy(dst, &X, sizeof(X));
|
| 263 |
|
|
}
|
| 264 |
|
|
|
| 265 |
|
|
/*
|
| 266 |
|
|
* decryptor
|
| 267 |
|
|
*/
|
| 268 |
|
|
static void fcrypt_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
|
| 269 |
|
|
{
|
| 270 |
|
|
const struct fcrypt_ctx *ctx = crypto_tfm_ctx(tfm);
|
| 271 |
|
|
struct {
|
| 272 |
|
|
__be32 l, r;
|
| 273 |
|
|
} X;
|
| 274 |
|
|
|
| 275 |
|
|
memcpy(&X, src, sizeof(X));
|
| 276 |
|
|
|
| 277 |
|
|
F_ENCRYPT(X.l, X.r, ctx->sched[0xf]);
|
| 278 |
|
|
F_ENCRYPT(X.r, X.l, ctx->sched[0xe]);
|
| 279 |
|
|
F_ENCRYPT(X.l, X.r, ctx->sched[0xd]);
|
| 280 |
|
|
F_ENCRYPT(X.r, X.l, ctx->sched[0xc]);
|
| 281 |
|
|
F_ENCRYPT(X.l, X.r, ctx->sched[0xb]);
|
| 282 |
|
|
F_ENCRYPT(X.r, X.l, ctx->sched[0xa]);
|
| 283 |
|
|
F_ENCRYPT(X.l, X.r, ctx->sched[0x9]);
|
| 284 |
|
|
F_ENCRYPT(X.r, X.l, ctx->sched[0x8]);
|
| 285 |
|
|
F_ENCRYPT(X.l, X.r, ctx->sched[0x7]);
|
| 286 |
|
|
F_ENCRYPT(X.r, X.l, ctx->sched[0x6]);
|
| 287 |
|
|
F_ENCRYPT(X.l, X.r, ctx->sched[0x5]);
|
| 288 |
|
|
F_ENCRYPT(X.r, X.l, ctx->sched[0x4]);
|
| 289 |
|
|
F_ENCRYPT(X.l, X.r, ctx->sched[0x3]);
|
| 290 |
|
|
F_ENCRYPT(X.r, X.l, ctx->sched[0x2]);
|
| 291 |
|
|
F_ENCRYPT(X.l, X.r, ctx->sched[0x1]);
|
| 292 |
|
|
F_ENCRYPT(X.r, X.l, ctx->sched[0x0]);
|
| 293 |
|
|
|
| 294 |
|
|
memcpy(dst, &X, sizeof(X));
|
| 295 |
|
|
}
|
| 296 |
|
|
|
| 297 |
|
|
/*
|
| 298 |
|
|
* Generate a key schedule from key, the least significant bit in each key byte
|
| 299 |
|
|
* is parity and shall be ignored. This leaves 56 significant bits in the key
|
| 300 |
|
|
* to scatter over the 16 key schedules. For each schedule extract the low
|
| 301 |
|
|
* order 32 bits and use as schedule, then rotate right by 11 bits.
|
| 302 |
|
|
*/
|
| 303 |
|
|
static int fcrypt_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
|
| 304 |
|
|
{
|
| 305 |
|
|
struct fcrypt_ctx *ctx = crypto_tfm_ctx(tfm);
|
| 306 |
|
|
|
| 307 |
|
|
#if BITS_PER_LONG == 64 /* the 64-bit version can also be used for 32-bit
|
| 308 |
|
|
* kernels - it seems to be faster but the code is
|
| 309 |
|
|
* larger */
|
| 310 |
|
|
|
| 311 |
|
|
u64 k; /* k holds all 56 non-parity bits */
|
| 312 |
|
|
|
| 313 |
|
|
/* discard the parity bits */
|
| 314 |
|
|
k = (*key++) >> 1;
|
| 315 |
|
|
k <<= 7;
|
| 316 |
|
|
k |= (*key++) >> 1;
|
| 317 |
|
|
k <<= 7;
|
| 318 |
|
|
k |= (*key++) >> 1;
|
| 319 |
|
|
k <<= 7;
|
| 320 |
|
|
k |= (*key++) >> 1;
|
| 321 |
|
|
k <<= 7;
|
| 322 |
|
|
k |= (*key++) >> 1;
|
| 323 |
|
|
k <<= 7;
|
| 324 |
|
|
k |= (*key++) >> 1;
|
| 325 |
|
|
k <<= 7;
|
| 326 |
|
|
k |= (*key++) >> 1;
|
| 327 |
|
|
k <<= 7;
|
| 328 |
|
|
k |= (*key) >> 1;
|
| 329 |
|
|
|
| 330 |
|
|
/* Use lower 32 bits for schedule, rotate by 11 each round (16 times) */
|
| 331 |
|
|
ctx->sched[0x0] = cpu_to_be32(k); ror56_64(k, 11);
|
| 332 |
|
|
ctx->sched[0x1] = cpu_to_be32(k); ror56_64(k, 11);
|
| 333 |
|
|
ctx->sched[0x2] = cpu_to_be32(k); ror56_64(k, 11);
|
| 334 |
|
|
ctx->sched[0x3] = cpu_to_be32(k); ror56_64(k, 11);
|
| 335 |
|
|
ctx->sched[0x4] = cpu_to_be32(k); ror56_64(k, 11);
|
| 336 |
|
|
ctx->sched[0x5] = cpu_to_be32(k); ror56_64(k, 11);
|
| 337 |
|
|
ctx->sched[0x6] = cpu_to_be32(k); ror56_64(k, 11);
|
| 338 |
|
|
ctx->sched[0x7] = cpu_to_be32(k); ror56_64(k, 11);
|
| 339 |
|
|
ctx->sched[0x8] = cpu_to_be32(k); ror56_64(k, 11);
|
| 340 |
|
|
ctx->sched[0x9] = cpu_to_be32(k); ror56_64(k, 11);
|
| 341 |
|
|
ctx->sched[0xa] = cpu_to_be32(k); ror56_64(k, 11);
|
| 342 |
|
|
ctx->sched[0xb] = cpu_to_be32(k); ror56_64(k, 11);
|
| 343 |
|
|
ctx->sched[0xc] = cpu_to_be32(k); ror56_64(k, 11);
|
| 344 |
|
|
ctx->sched[0xd] = cpu_to_be32(k); ror56_64(k, 11);
|
| 345 |
|
|
ctx->sched[0xe] = cpu_to_be32(k); ror56_64(k, 11);
|
| 346 |
|
|
ctx->sched[0xf] = cpu_to_be32(k);
|
| 347 |
|
|
|
| 348 |
|
|
return 0;
|
| 349 |
|
|
#else
|
| 350 |
|
|
u32 hi, lo; /* hi is upper 24 bits and lo lower 32, total 56 */
|
| 351 |
|
|
|
| 352 |
|
|
/* discard the parity bits */
|
| 353 |
|
|
lo = (*key++) >> 1;
|
| 354 |
|
|
lo <<= 7;
|
| 355 |
|
|
lo |= (*key++) >> 1;
|
| 356 |
|
|
lo <<= 7;
|
| 357 |
|
|
lo |= (*key++) >> 1;
|
| 358 |
|
|
lo <<= 7;
|
| 359 |
|
|
lo |= (*key++) >> 1;
|
| 360 |
|
|
hi = lo >> 4;
|
| 361 |
|
|
lo &= 0xf;
|
| 362 |
|
|
lo <<= 7;
|
| 363 |
|
|
lo |= (*key++) >> 1;
|
| 364 |
|
|
lo <<= 7;
|
| 365 |
|
|
lo |= (*key++) >> 1;
|
| 366 |
|
|
lo <<= 7;
|
| 367 |
|
|
lo |= (*key++) >> 1;
|
| 368 |
|
|
lo <<= 7;
|
| 369 |
|
|
lo |= (*key) >> 1;
|
| 370 |
|
|
|
| 371 |
|
|
/* Use lower 32 bits for schedule, rotate by 11 each round (16 times) */
|
| 372 |
|
|
ctx->sched[0x0] = cpu_to_be32(lo); ror56(hi, lo, 11);
|
| 373 |
|
|
ctx->sched[0x1] = cpu_to_be32(lo); ror56(hi, lo, 11);
|
| 374 |
|
|
ctx->sched[0x2] = cpu_to_be32(lo); ror56(hi, lo, 11);
|
| 375 |
|
|
ctx->sched[0x3] = cpu_to_be32(lo); ror56(hi, lo, 11);
|
| 376 |
|
|
ctx->sched[0x4] = cpu_to_be32(lo); ror56(hi, lo, 11);
|
| 377 |
|
|
ctx->sched[0x5] = cpu_to_be32(lo); ror56(hi, lo, 11);
|
| 378 |
|
|
ctx->sched[0x6] = cpu_to_be32(lo); ror56(hi, lo, 11);
|
| 379 |
|
|
ctx->sched[0x7] = cpu_to_be32(lo); ror56(hi, lo, 11);
|
| 380 |
|
|
ctx->sched[0x8] = cpu_to_be32(lo); ror56(hi, lo, 11);
|
| 381 |
|
|
ctx->sched[0x9] = cpu_to_be32(lo); ror56(hi, lo, 11);
|
| 382 |
|
|
ctx->sched[0xa] = cpu_to_be32(lo); ror56(hi, lo, 11);
|
| 383 |
|
|
ctx->sched[0xb] = cpu_to_be32(lo); ror56(hi, lo, 11);
|
| 384 |
|
|
ctx->sched[0xc] = cpu_to_be32(lo); ror56(hi, lo, 11);
|
| 385 |
|
|
ctx->sched[0xd] = cpu_to_be32(lo); ror56(hi, lo, 11);
|
| 386 |
|
|
ctx->sched[0xe] = cpu_to_be32(lo); ror56(hi, lo, 11);
|
| 387 |
|
|
ctx->sched[0xf] = cpu_to_be32(lo);
|
| 388 |
|
|
return 0;
|
| 389 |
|
|
#endif
|
| 390 |
|
|
}
|
| 391 |
|
|
|
| 392 |
|
|
static struct crypto_alg fcrypt_alg = {
|
| 393 |
|
|
.cra_name = "fcrypt",
|
| 394 |
|
|
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
|
| 395 |
|
|
.cra_blocksize = 8,
|
| 396 |
|
|
.cra_ctxsize = sizeof(struct fcrypt_ctx),
|
| 397 |
|
|
.cra_module = THIS_MODULE,
|
| 398 |
|
|
.cra_alignmask = 3,
|
| 399 |
|
|
.cra_list = LIST_HEAD_INIT(fcrypt_alg.cra_list),
|
| 400 |
|
|
.cra_u = { .cipher = {
|
| 401 |
|
|
.cia_min_keysize = 8,
|
| 402 |
|
|
.cia_max_keysize = 8,
|
| 403 |
|
|
.cia_setkey = fcrypt_setkey,
|
| 404 |
|
|
.cia_encrypt = fcrypt_encrypt,
|
| 405 |
|
|
.cia_decrypt = fcrypt_decrypt } }
|
| 406 |
|
|
};
|
| 407 |
|
|
|
| 408 |
|
|
static int __init init(void)
|
| 409 |
|
|
{
|
| 410 |
|
|
return crypto_register_alg(&fcrypt_alg);
|
| 411 |
|
|
}
|
| 412 |
|
|
|
| 413 |
|
|
static void __exit fini(void)
|
| 414 |
|
|
{
|
| 415 |
|
|
crypto_unregister_alg(&fcrypt_alg);
|
| 416 |
|
|
}
|
| 417 |
|
|
|
| 418 |
|
|
module_init(init);
|
| 419 |
|
|
module_exit(fini);
|
| 420 |
|
|
|
| 421 |
|
|
MODULE_LICENSE("Dual BSD/GPL");
|
| 422 |
|
|
MODULE_DESCRIPTION("FCrypt Cipher Algorithm");
|
| 423 |
|
|
MODULE_AUTHOR("David Howells <dhowells@redhat.com>");
|
