David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 1 | /* 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 | * |
John Anthony Kazos Jr | 991d174 | 2007-10-19 23:06:17 +0200 | [diff] [blame] | 13 | * Copyright (c) 1995 - 2000 Kungliga Tekniska Högskolan |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 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> |
Herbert Xu | 14386d4 | 2022-11-25 12:36:28 +0800 | [diff] [blame] | 46 | #include <crypto/algapi.h> |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 47 | #include <linux/bitops.h> |
| 48 | #include <linux/init.h> |
| 49 | #include <linux/module.h> |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 50 | |
| 51 | #define ROUNDS 16 |
| 52 | |
| 53 | struct fcrypt_ctx { |
Al Viro | 3c50b36 | 2007-12-05 08:38:56 +0000 | [diff] [blame] | 54 | __be32 sched[ROUNDS]; |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 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)); \ |
Richard Hartmann | 0047e81 | 2010-02-16 20:34:07 +0800 | [diff] [blame] | 63 | } while (0) |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 64 | |
| 65 | /* Rotate right one 64 bit number as a 56 bit number */ |
Milan Djurovic | 5c083eb | 2021-03-26 11:35:11 -0700 | [diff] [blame] | 66 | #define ror56_64(k, n) (k = (k >> n) | ((k & ((1 << n) - 1)) << (56 - n))) |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 67 | |
| 68 | /* |
| 69 | * Sboxes for Feistel network derived from |
| 70 | * /afs/transarc.com/public/afsps/afs.rel31b.export-src/rxkad/sboxes.h |
| 71 | */ |
| 72 | #undef Z |
Harvey Harrison | dad3df2 | 2008-11-28 20:49:19 +0800 | [diff] [blame] | 73 | #define Z(x) cpu_to_be32(x << 3) |
Al Viro | 3c50b36 | 2007-12-05 08:38:56 +0000 | [diff] [blame] | 74 | static const __be32 sbox0[256] = { |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 75 | Z(0xea), Z(0x7f), Z(0xb2), Z(0x64), Z(0x9d), Z(0xb0), Z(0xd9), Z(0x11), |
| 76 | Z(0xcd), Z(0x86), Z(0x86), Z(0x91), Z(0x0a), Z(0xb2), Z(0x93), Z(0x06), |
| 77 | Z(0x0e), Z(0x06), Z(0xd2), Z(0x65), Z(0x73), Z(0xc5), Z(0x28), Z(0x60), |
| 78 | Z(0xf2), Z(0x20), Z(0xb5), Z(0x38), Z(0x7e), Z(0xda), Z(0x9f), Z(0xe3), |
| 79 | Z(0xd2), Z(0xcf), Z(0xc4), Z(0x3c), Z(0x61), Z(0xff), Z(0x4a), Z(0x4a), |
| 80 | Z(0x35), Z(0xac), Z(0xaa), Z(0x5f), Z(0x2b), Z(0xbb), Z(0xbc), Z(0x53), |
| 81 | Z(0x4e), Z(0x9d), Z(0x78), Z(0xa3), Z(0xdc), Z(0x09), Z(0x32), Z(0x10), |
| 82 | Z(0xc6), Z(0x6f), Z(0x66), Z(0xd6), Z(0xab), Z(0xa9), Z(0xaf), Z(0xfd), |
| 83 | Z(0x3b), Z(0x95), Z(0xe8), Z(0x34), Z(0x9a), Z(0x81), Z(0x72), Z(0x80), |
| 84 | Z(0x9c), Z(0xf3), Z(0xec), Z(0xda), Z(0x9f), Z(0x26), Z(0x76), Z(0x15), |
| 85 | Z(0x3e), Z(0x55), Z(0x4d), Z(0xde), Z(0x84), Z(0xee), Z(0xad), Z(0xc7), |
| 86 | Z(0xf1), Z(0x6b), Z(0x3d), Z(0xd3), Z(0x04), Z(0x49), Z(0xaa), Z(0x24), |
| 87 | Z(0x0b), Z(0x8a), Z(0x83), Z(0xba), Z(0xfa), Z(0x85), Z(0xa0), Z(0xa8), |
| 88 | Z(0xb1), Z(0xd4), Z(0x01), Z(0xd8), Z(0x70), Z(0x64), Z(0xf0), Z(0x51), |
| 89 | Z(0xd2), Z(0xc3), Z(0xa7), Z(0x75), Z(0x8c), Z(0xa5), Z(0x64), Z(0xef), |
| 90 | Z(0x10), Z(0x4e), Z(0xb7), Z(0xc6), Z(0x61), Z(0x03), Z(0xeb), Z(0x44), |
| 91 | Z(0x3d), Z(0xe5), Z(0xb3), Z(0x5b), Z(0xae), Z(0xd5), Z(0xad), Z(0x1d), |
| 92 | Z(0xfa), Z(0x5a), Z(0x1e), Z(0x33), Z(0xab), Z(0x93), Z(0xa2), Z(0xb7), |
| 93 | Z(0xe7), Z(0xa8), Z(0x45), Z(0xa4), Z(0xcd), Z(0x29), Z(0x63), Z(0x44), |
| 94 | Z(0xb6), Z(0x69), Z(0x7e), Z(0x2e), Z(0x62), Z(0x03), Z(0xc8), Z(0xe0), |
| 95 | Z(0x17), Z(0xbb), Z(0xc7), Z(0xf3), Z(0x3f), Z(0x36), Z(0xba), Z(0x71), |
| 96 | Z(0x8e), Z(0x97), Z(0x65), Z(0x60), Z(0x69), Z(0xb6), Z(0xf6), Z(0xe6), |
| 97 | Z(0x6e), Z(0xe0), Z(0x81), Z(0x59), Z(0xe8), Z(0xaf), Z(0xdd), Z(0x95), |
| 98 | Z(0x22), Z(0x99), Z(0xfd), Z(0x63), Z(0x19), Z(0x74), Z(0x61), Z(0xb1), |
| 99 | Z(0xb6), Z(0x5b), Z(0xae), Z(0x54), Z(0xb3), Z(0x70), Z(0xff), Z(0xc6), |
| 100 | Z(0x3b), Z(0x3e), Z(0xc1), Z(0xd7), Z(0xe1), Z(0x0e), Z(0x76), Z(0xe5), |
| 101 | Z(0x36), Z(0x4f), Z(0x59), Z(0xc7), Z(0x08), Z(0x6e), Z(0x82), Z(0xa6), |
| 102 | Z(0x93), Z(0xc4), Z(0xaa), Z(0x26), Z(0x49), Z(0xe0), Z(0x21), Z(0x64), |
| 103 | Z(0x07), Z(0x9f), Z(0x64), Z(0x81), Z(0x9c), Z(0xbf), Z(0xf9), Z(0xd1), |
| 104 | Z(0x43), Z(0xf8), Z(0xb6), Z(0xb9), Z(0xf1), Z(0x24), Z(0x75), Z(0x03), |
| 105 | Z(0xe4), Z(0xb0), Z(0x99), Z(0x46), Z(0x3d), Z(0xf5), Z(0xd1), Z(0x39), |
| 106 | Z(0x72), Z(0x12), Z(0xf6), Z(0xba), Z(0x0c), Z(0x0d), Z(0x42), Z(0x2e) |
| 107 | }; |
| 108 | |
| 109 | #undef Z |
Jan-Simon Möller | 06e710b | 2013-08-29 20:09:24 +0200 | [diff] [blame] | 110 | #define Z(x) cpu_to_be32(((x & 0x1f) << 27) | (x >> 5)) |
Al Viro | 3c50b36 | 2007-12-05 08:38:56 +0000 | [diff] [blame] | 111 | static const __be32 sbox1[256] = { |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 112 | Z(0x77), Z(0x14), Z(0xa6), Z(0xfe), Z(0xb2), Z(0x5e), Z(0x8c), Z(0x3e), |
| 113 | Z(0x67), Z(0x6c), Z(0xa1), Z(0x0d), Z(0xc2), Z(0xa2), Z(0xc1), Z(0x85), |
| 114 | Z(0x6c), Z(0x7b), Z(0x67), Z(0xc6), Z(0x23), Z(0xe3), Z(0xf2), Z(0x89), |
| 115 | Z(0x50), Z(0x9c), Z(0x03), Z(0xb7), Z(0x73), Z(0xe6), Z(0xe1), Z(0x39), |
| 116 | Z(0x31), Z(0x2c), Z(0x27), Z(0x9f), Z(0xa5), Z(0x69), Z(0x44), Z(0xd6), |
| 117 | Z(0x23), Z(0x83), Z(0x98), Z(0x7d), Z(0x3c), Z(0xb4), Z(0x2d), Z(0x99), |
| 118 | Z(0x1c), Z(0x1f), Z(0x8c), Z(0x20), Z(0x03), Z(0x7c), Z(0x5f), Z(0xad), |
| 119 | Z(0xf4), Z(0xfa), Z(0x95), Z(0xca), Z(0x76), Z(0x44), Z(0xcd), Z(0xb6), |
| 120 | Z(0xb8), Z(0xa1), Z(0xa1), Z(0xbe), Z(0x9e), Z(0x54), Z(0x8f), Z(0x0b), |
| 121 | Z(0x16), Z(0x74), Z(0x31), Z(0x8a), Z(0x23), Z(0x17), Z(0x04), Z(0xfa), |
| 122 | Z(0x79), Z(0x84), Z(0xb1), Z(0xf5), Z(0x13), Z(0xab), Z(0xb5), Z(0x2e), |
| 123 | Z(0xaa), Z(0x0c), Z(0x60), Z(0x6b), Z(0x5b), Z(0xc4), Z(0x4b), Z(0xbc), |
| 124 | Z(0xe2), Z(0xaf), Z(0x45), Z(0x73), Z(0xfa), Z(0xc9), Z(0x49), Z(0xcd), |
| 125 | Z(0x00), Z(0x92), Z(0x7d), Z(0x97), Z(0x7a), Z(0x18), Z(0x60), Z(0x3d), |
| 126 | Z(0xcf), Z(0x5b), Z(0xde), Z(0xc6), Z(0xe2), Z(0xe6), Z(0xbb), Z(0x8b), |
| 127 | Z(0x06), Z(0xda), Z(0x08), Z(0x15), Z(0x1b), Z(0x88), Z(0x6a), Z(0x17), |
| 128 | Z(0x89), Z(0xd0), Z(0xa9), Z(0xc1), Z(0xc9), Z(0x70), Z(0x6b), Z(0xe5), |
| 129 | Z(0x43), Z(0xf4), Z(0x68), Z(0xc8), Z(0xd3), Z(0x84), Z(0x28), Z(0x0a), |
| 130 | Z(0x52), Z(0x66), Z(0xa3), Z(0xca), Z(0xf2), Z(0xe3), Z(0x7f), Z(0x7a), |
| 131 | Z(0x31), Z(0xf7), Z(0x88), Z(0x94), Z(0x5e), Z(0x9c), Z(0x63), Z(0xd5), |
| 132 | Z(0x24), Z(0x66), Z(0xfc), Z(0xb3), Z(0x57), Z(0x25), Z(0xbe), Z(0x89), |
| 133 | Z(0x44), Z(0xc4), Z(0xe0), Z(0x8f), Z(0x23), Z(0x3c), Z(0x12), Z(0x52), |
| 134 | Z(0xf5), Z(0x1e), Z(0xf4), Z(0xcb), Z(0x18), Z(0x33), Z(0x1f), Z(0xf8), |
| 135 | Z(0x69), Z(0x10), Z(0x9d), Z(0xd3), Z(0xf7), Z(0x28), Z(0xf8), Z(0x30), |
| 136 | Z(0x05), Z(0x5e), Z(0x32), Z(0xc0), Z(0xd5), Z(0x19), Z(0xbd), Z(0x45), |
| 137 | Z(0x8b), Z(0x5b), Z(0xfd), Z(0xbc), Z(0xe2), Z(0x5c), Z(0xa9), Z(0x96), |
| 138 | Z(0xef), Z(0x70), Z(0xcf), Z(0xc2), Z(0x2a), Z(0xb3), Z(0x61), Z(0xad), |
| 139 | Z(0x80), Z(0x48), Z(0x81), Z(0xb7), Z(0x1d), Z(0x43), Z(0xd9), Z(0xd7), |
| 140 | Z(0x45), Z(0xf0), Z(0xd8), Z(0x8a), Z(0x59), Z(0x7c), Z(0x57), Z(0xc1), |
| 141 | Z(0x79), Z(0xc7), Z(0x34), Z(0xd6), Z(0x43), Z(0xdf), Z(0xe4), Z(0x78), |
| 142 | Z(0x16), Z(0x06), Z(0xda), Z(0x92), Z(0x76), Z(0x51), Z(0xe1), Z(0xd4), |
| 143 | Z(0x70), Z(0x03), Z(0xe0), Z(0x2f), Z(0x96), Z(0x91), Z(0x82), Z(0x80) |
| 144 | }; |
| 145 | |
| 146 | #undef Z |
Harvey Harrison | dad3df2 | 2008-11-28 20:49:19 +0800 | [diff] [blame] | 147 | #define Z(x) cpu_to_be32(x << 11) |
Al Viro | 3c50b36 | 2007-12-05 08:38:56 +0000 | [diff] [blame] | 148 | static const __be32 sbox2[256] = { |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 149 | Z(0xf0), Z(0x37), Z(0x24), Z(0x53), Z(0x2a), Z(0x03), Z(0x83), Z(0x86), |
| 150 | Z(0xd1), Z(0xec), Z(0x50), Z(0xf0), Z(0x42), Z(0x78), Z(0x2f), Z(0x6d), |
| 151 | Z(0xbf), Z(0x80), Z(0x87), Z(0x27), Z(0x95), Z(0xe2), Z(0xc5), Z(0x5d), |
| 152 | Z(0xf9), Z(0x6f), Z(0xdb), Z(0xb4), Z(0x65), Z(0x6e), Z(0xe7), Z(0x24), |
| 153 | Z(0xc8), Z(0x1a), Z(0xbb), Z(0x49), Z(0xb5), Z(0x0a), Z(0x7d), Z(0xb9), |
| 154 | Z(0xe8), Z(0xdc), Z(0xb7), Z(0xd9), Z(0x45), Z(0x20), Z(0x1b), Z(0xce), |
| 155 | Z(0x59), Z(0x9d), Z(0x6b), Z(0xbd), Z(0x0e), Z(0x8f), Z(0xa3), Z(0xa9), |
| 156 | Z(0xbc), Z(0x74), Z(0xa6), Z(0xf6), Z(0x7f), Z(0x5f), Z(0xb1), Z(0x68), |
| 157 | Z(0x84), Z(0xbc), Z(0xa9), Z(0xfd), Z(0x55), Z(0x50), Z(0xe9), Z(0xb6), |
| 158 | Z(0x13), Z(0x5e), Z(0x07), Z(0xb8), Z(0x95), Z(0x02), Z(0xc0), Z(0xd0), |
| 159 | Z(0x6a), Z(0x1a), Z(0x85), Z(0xbd), Z(0xb6), Z(0xfd), Z(0xfe), Z(0x17), |
| 160 | Z(0x3f), Z(0x09), Z(0xa3), Z(0x8d), Z(0xfb), Z(0xed), Z(0xda), Z(0x1d), |
| 161 | Z(0x6d), Z(0x1c), Z(0x6c), Z(0x01), Z(0x5a), Z(0xe5), Z(0x71), Z(0x3e), |
| 162 | Z(0x8b), Z(0x6b), Z(0xbe), Z(0x29), Z(0xeb), Z(0x12), Z(0x19), Z(0x34), |
| 163 | Z(0xcd), Z(0xb3), Z(0xbd), Z(0x35), Z(0xea), Z(0x4b), Z(0xd5), Z(0xae), |
| 164 | Z(0x2a), Z(0x79), Z(0x5a), Z(0xa5), Z(0x32), Z(0x12), Z(0x7b), Z(0xdc), |
| 165 | Z(0x2c), Z(0xd0), Z(0x22), Z(0x4b), Z(0xb1), Z(0x85), Z(0x59), Z(0x80), |
| 166 | Z(0xc0), Z(0x30), Z(0x9f), Z(0x73), Z(0xd3), Z(0x14), Z(0x48), Z(0x40), |
| 167 | Z(0x07), Z(0x2d), Z(0x8f), Z(0x80), Z(0x0f), Z(0xce), Z(0x0b), Z(0x5e), |
| 168 | Z(0xb7), Z(0x5e), Z(0xac), Z(0x24), Z(0x94), Z(0x4a), Z(0x18), Z(0x15), |
| 169 | Z(0x05), Z(0xe8), Z(0x02), Z(0x77), Z(0xa9), Z(0xc7), Z(0x40), Z(0x45), |
| 170 | Z(0x89), Z(0xd1), Z(0xea), Z(0xde), Z(0x0c), Z(0x79), Z(0x2a), Z(0x99), |
| 171 | Z(0x6c), Z(0x3e), Z(0x95), Z(0xdd), Z(0x8c), Z(0x7d), Z(0xad), Z(0x6f), |
| 172 | Z(0xdc), Z(0xff), Z(0xfd), Z(0x62), Z(0x47), Z(0xb3), Z(0x21), Z(0x8a), |
| 173 | Z(0xec), Z(0x8e), Z(0x19), Z(0x18), Z(0xb4), Z(0x6e), Z(0x3d), Z(0xfd), |
| 174 | Z(0x74), Z(0x54), Z(0x1e), Z(0x04), Z(0x85), Z(0xd8), Z(0xbc), Z(0x1f), |
| 175 | Z(0x56), Z(0xe7), Z(0x3a), Z(0x56), Z(0x67), Z(0xd6), Z(0xc8), Z(0xa5), |
| 176 | Z(0xf3), Z(0x8e), Z(0xde), Z(0xae), Z(0x37), Z(0x49), Z(0xb7), Z(0xfa), |
| 177 | Z(0xc8), Z(0xf4), Z(0x1f), Z(0xe0), Z(0x2a), Z(0x9b), Z(0x15), Z(0xd1), |
| 178 | Z(0x34), Z(0x0e), Z(0xb5), Z(0xe0), Z(0x44), Z(0x78), Z(0x84), Z(0x59), |
| 179 | Z(0x56), Z(0x68), Z(0x77), Z(0xa5), Z(0x14), Z(0x06), Z(0xf5), Z(0x2f), |
| 180 | Z(0x8c), Z(0x8a), Z(0x73), Z(0x80), Z(0x76), Z(0xb4), Z(0x10), Z(0x86) |
| 181 | }; |
| 182 | |
| 183 | #undef Z |
Harvey Harrison | dad3df2 | 2008-11-28 20:49:19 +0800 | [diff] [blame] | 184 | #define Z(x) cpu_to_be32(x << 19) |
Al Viro | 3c50b36 | 2007-12-05 08:38:56 +0000 | [diff] [blame] | 185 | static const __be32 sbox3[256] = { |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 186 | Z(0xa9), Z(0x2a), Z(0x48), Z(0x51), Z(0x84), Z(0x7e), Z(0x49), Z(0xe2), |
| 187 | Z(0xb5), Z(0xb7), Z(0x42), Z(0x33), Z(0x7d), Z(0x5d), Z(0xa6), Z(0x12), |
| 188 | Z(0x44), Z(0x48), Z(0x6d), Z(0x28), Z(0xaa), Z(0x20), Z(0x6d), Z(0x57), |
| 189 | Z(0xd6), Z(0x6b), Z(0x5d), Z(0x72), Z(0xf0), Z(0x92), Z(0x5a), Z(0x1b), |
| 190 | Z(0x53), Z(0x80), Z(0x24), Z(0x70), Z(0x9a), Z(0xcc), Z(0xa7), Z(0x66), |
| 191 | Z(0xa1), Z(0x01), Z(0xa5), Z(0x41), Z(0x97), Z(0x41), Z(0x31), Z(0x82), |
| 192 | Z(0xf1), Z(0x14), Z(0xcf), Z(0x53), Z(0x0d), Z(0xa0), Z(0x10), Z(0xcc), |
| 193 | Z(0x2a), Z(0x7d), Z(0xd2), Z(0xbf), Z(0x4b), Z(0x1a), Z(0xdb), Z(0x16), |
| 194 | Z(0x47), Z(0xf6), Z(0x51), Z(0x36), Z(0xed), Z(0xf3), Z(0xb9), Z(0x1a), |
| 195 | Z(0xa7), Z(0xdf), Z(0x29), Z(0x43), Z(0x01), Z(0x54), Z(0x70), Z(0xa4), |
| 196 | Z(0xbf), Z(0xd4), Z(0x0b), Z(0x53), Z(0x44), Z(0x60), Z(0x9e), Z(0x23), |
| 197 | Z(0xa1), Z(0x18), Z(0x68), Z(0x4f), Z(0xf0), Z(0x2f), Z(0x82), Z(0xc2), |
| 198 | Z(0x2a), Z(0x41), Z(0xb2), Z(0x42), Z(0x0c), Z(0xed), Z(0x0c), Z(0x1d), |
| 199 | Z(0x13), Z(0x3a), Z(0x3c), Z(0x6e), Z(0x35), Z(0xdc), Z(0x60), Z(0x65), |
| 200 | Z(0x85), Z(0xe9), Z(0x64), Z(0x02), Z(0x9a), Z(0x3f), Z(0x9f), Z(0x87), |
| 201 | Z(0x96), Z(0xdf), Z(0xbe), Z(0xf2), Z(0xcb), Z(0xe5), Z(0x6c), Z(0xd4), |
| 202 | Z(0x5a), Z(0x83), Z(0xbf), Z(0x92), Z(0x1b), Z(0x94), Z(0x00), Z(0x42), |
| 203 | Z(0xcf), Z(0x4b), Z(0x00), Z(0x75), Z(0xba), Z(0x8f), Z(0x76), Z(0x5f), |
| 204 | Z(0x5d), Z(0x3a), Z(0x4d), Z(0x09), Z(0x12), Z(0x08), Z(0x38), Z(0x95), |
| 205 | Z(0x17), Z(0xe4), Z(0x01), Z(0x1d), Z(0x4c), Z(0xa9), Z(0xcc), Z(0x85), |
| 206 | Z(0x82), Z(0x4c), Z(0x9d), Z(0x2f), Z(0x3b), Z(0x66), Z(0xa1), Z(0x34), |
| 207 | Z(0x10), Z(0xcd), Z(0x59), Z(0x89), Z(0xa5), Z(0x31), Z(0xcf), Z(0x05), |
| 208 | Z(0xc8), Z(0x84), Z(0xfa), Z(0xc7), Z(0xba), Z(0x4e), Z(0x8b), Z(0x1a), |
| 209 | Z(0x19), Z(0xf1), Z(0xa1), Z(0x3b), Z(0x18), Z(0x12), Z(0x17), Z(0xb0), |
| 210 | Z(0x98), Z(0x8d), Z(0x0b), Z(0x23), Z(0xc3), Z(0x3a), Z(0x2d), Z(0x20), |
| 211 | Z(0xdf), Z(0x13), Z(0xa0), Z(0xa8), Z(0x4c), Z(0x0d), Z(0x6c), Z(0x2f), |
| 212 | Z(0x47), Z(0x13), Z(0x13), Z(0x52), Z(0x1f), Z(0x2d), Z(0xf5), Z(0x79), |
| 213 | Z(0x3d), Z(0xa2), Z(0x54), Z(0xbd), Z(0x69), Z(0xc8), Z(0x6b), Z(0xf3), |
| 214 | Z(0x05), Z(0x28), Z(0xf1), Z(0x16), Z(0x46), Z(0x40), Z(0xb0), Z(0x11), |
| 215 | Z(0xd3), Z(0xb7), Z(0x95), Z(0x49), Z(0xcf), Z(0xc3), Z(0x1d), Z(0x8f), |
| 216 | Z(0xd8), Z(0xe1), Z(0x73), Z(0xdb), Z(0xad), Z(0xc8), Z(0xc9), Z(0xa9), |
| 217 | Z(0xa1), Z(0xc2), Z(0xc5), Z(0xe3), Z(0xba), Z(0xfc), Z(0x0e), Z(0x25) |
| 218 | }; |
| 219 | |
| 220 | /* |
| 221 | * This is a 16 round Feistel network with permutation F_ENCRYPT |
| 222 | */ |
| 223 | #define F_ENCRYPT(R, L, sched) \ |
| 224 | do { \ |
Al Viro | 3c50b36 | 2007-12-05 08:38:56 +0000 | [diff] [blame] | 225 | union lc4 { __be32 l; u8 c[4]; } u; \ |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 226 | u.l = sched ^ R; \ |
| 227 | L ^= sbox0[u.c[0]] ^ sbox1[u.c[1]] ^ sbox2[u.c[2]] ^ sbox3[u.c[3]]; \ |
Richard Hartmann | 0047e81 | 2010-02-16 20:34:07 +0800 | [diff] [blame] | 228 | } while (0) |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 229 | |
| 230 | /* |
| 231 | * encryptor |
| 232 | */ |
| 233 | static void fcrypt_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
| 234 | { |
| 235 | const struct fcrypt_ctx *ctx = crypto_tfm_ctx(tfm); |
| 236 | struct { |
Al Viro | 3c50b36 | 2007-12-05 08:38:56 +0000 | [diff] [blame] | 237 | __be32 l, r; |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 238 | } X; |
| 239 | |
| 240 | memcpy(&X, src, sizeof(X)); |
| 241 | |
| 242 | F_ENCRYPT(X.r, X.l, ctx->sched[0x0]); |
| 243 | F_ENCRYPT(X.l, X.r, ctx->sched[0x1]); |
| 244 | F_ENCRYPT(X.r, X.l, ctx->sched[0x2]); |
| 245 | F_ENCRYPT(X.l, X.r, ctx->sched[0x3]); |
| 246 | F_ENCRYPT(X.r, X.l, ctx->sched[0x4]); |
| 247 | F_ENCRYPT(X.l, X.r, ctx->sched[0x5]); |
| 248 | F_ENCRYPT(X.r, X.l, ctx->sched[0x6]); |
| 249 | F_ENCRYPT(X.l, X.r, ctx->sched[0x7]); |
| 250 | F_ENCRYPT(X.r, X.l, ctx->sched[0x8]); |
| 251 | F_ENCRYPT(X.l, X.r, ctx->sched[0x9]); |
| 252 | F_ENCRYPT(X.r, X.l, ctx->sched[0xa]); |
| 253 | F_ENCRYPT(X.l, X.r, ctx->sched[0xb]); |
| 254 | F_ENCRYPT(X.r, X.l, ctx->sched[0xc]); |
| 255 | F_ENCRYPT(X.l, X.r, ctx->sched[0xd]); |
| 256 | F_ENCRYPT(X.r, X.l, ctx->sched[0xe]); |
| 257 | F_ENCRYPT(X.l, X.r, ctx->sched[0xf]); |
| 258 | |
| 259 | memcpy(dst, &X, sizeof(X)); |
| 260 | } |
| 261 | |
| 262 | /* |
| 263 | * decryptor |
| 264 | */ |
| 265 | static void fcrypt_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) |
| 266 | { |
| 267 | const struct fcrypt_ctx *ctx = crypto_tfm_ctx(tfm); |
| 268 | struct { |
Al Viro | 3c50b36 | 2007-12-05 08:38:56 +0000 | [diff] [blame] | 269 | __be32 l, r; |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 270 | } X; |
| 271 | |
| 272 | memcpy(&X, src, sizeof(X)); |
| 273 | |
| 274 | F_ENCRYPT(X.l, X.r, ctx->sched[0xf]); |
| 275 | F_ENCRYPT(X.r, X.l, ctx->sched[0xe]); |
| 276 | F_ENCRYPT(X.l, X.r, ctx->sched[0xd]); |
| 277 | F_ENCRYPT(X.r, X.l, ctx->sched[0xc]); |
| 278 | F_ENCRYPT(X.l, X.r, ctx->sched[0xb]); |
| 279 | F_ENCRYPT(X.r, X.l, ctx->sched[0xa]); |
| 280 | F_ENCRYPT(X.l, X.r, ctx->sched[0x9]); |
| 281 | F_ENCRYPT(X.r, X.l, ctx->sched[0x8]); |
| 282 | F_ENCRYPT(X.l, X.r, ctx->sched[0x7]); |
| 283 | F_ENCRYPT(X.r, X.l, ctx->sched[0x6]); |
| 284 | F_ENCRYPT(X.l, X.r, ctx->sched[0x5]); |
| 285 | F_ENCRYPT(X.r, X.l, ctx->sched[0x4]); |
| 286 | F_ENCRYPT(X.l, X.r, ctx->sched[0x3]); |
| 287 | F_ENCRYPT(X.r, X.l, ctx->sched[0x2]); |
| 288 | F_ENCRYPT(X.l, X.r, ctx->sched[0x1]); |
| 289 | F_ENCRYPT(X.r, X.l, ctx->sched[0x0]); |
| 290 | |
| 291 | memcpy(dst, &X, sizeof(X)); |
| 292 | } |
| 293 | |
| 294 | /* |
| 295 | * Generate a key schedule from key, the least significant bit in each key byte |
| 296 | * is parity and shall be ignored. This leaves 56 significant bits in the key |
| 297 | * to scatter over the 16 key schedules. For each schedule extract the low |
| 298 | * order 32 bits and use as schedule, then rotate right by 11 bits. |
| 299 | */ |
| 300 | static int fcrypt_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen) |
| 301 | { |
| 302 | struct fcrypt_ctx *ctx = crypto_tfm_ctx(tfm); |
| 303 | |
| 304 | #if BITS_PER_LONG == 64 /* the 64-bit version can also be used for 32-bit |
| 305 | * kernels - it seems to be faster but the code is |
| 306 | * larger */ |
| 307 | |
| 308 | u64 k; /* k holds all 56 non-parity bits */ |
| 309 | |
| 310 | /* discard the parity bits */ |
| 311 | k = (*key++) >> 1; |
| 312 | k <<= 7; |
| 313 | k |= (*key++) >> 1; |
| 314 | k <<= 7; |
| 315 | k |= (*key++) >> 1; |
| 316 | k <<= 7; |
| 317 | k |= (*key++) >> 1; |
| 318 | k <<= 7; |
| 319 | k |= (*key++) >> 1; |
| 320 | k <<= 7; |
| 321 | k |= (*key++) >> 1; |
| 322 | k <<= 7; |
| 323 | k |= (*key++) >> 1; |
| 324 | k <<= 7; |
| 325 | k |= (*key) >> 1; |
| 326 | |
| 327 | /* Use lower 32 bits for schedule, rotate by 11 each round (16 times) */ |
Al Viro | 3c50b36 | 2007-12-05 08:38:56 +0000 | [diff] [blame] | 328 | ctx->sched[0x0] = cpu_to_be32(k); ror56_64(k, 11); |
| 329 | ctx->sched[0x1] = cpu_to_be32(k); ror56_64(k, 11); |
| 330 | ctx->sched[0x2] = cpu_to_be32(k); ror56_64(k, 11); |
| 331 | ctx->sched[0x3] = cpu_to_be32(k); ror56_64(k, 11); |
| 332 | ctx->sched[0x4] = cpu_to_be32(k); ror56_64(k, 11); |
| 333 | ctx->sched[0x5] = cpu_to_be32(k); ror56_64(k, 11); |
| 334 | ctx->sched[0x6] = cpu_to_be32(k); ror56_64(k, 11); |
| 335 | ctx->sched[0x7] = cpu_to_be32(k); ror56_64(k, 11); |
| 336 | ctx->sched[0x8] = cpu_to_be32(k); ror56_64(k, 11); |
| 337 | ctx->sched[0x9] = cpu_to_be32(k); ror56_64(k, 11); |
| 338 | ctx->sched[0xa] = cpu_to_be32(k); ror56_64(k, 11); |
| 339 | ctx->sched[0xb] = cpu_to_be32(k); ror56_64(k, 11); |
| 340 | ctx->sched[0xc] = cpu_to_be32(k); ror56_64(k, 11); |
| 341 | ctx->sched[0xd] = cpu_to_be32(k); ror56_64(k, 11); |
| 342 | ctx->sched[0xe] = cpu_to_be32(k); ror56_64(k, 11); |
| 343 | ctx->sched[0xf] = cpu_to_be32(k); |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 344 | |
| 345 | return 0; |
| 346 | #else |
| 347 | u32 hi, lo; /* hi is upper 24 bits and lo lower 32, total 56 */ |
| 348 | |
| 349 | /* discard the parity bits */ |
| 350 | lo = (*key++) >> 1; |
| 351 | lo <<= 7; |
| 352 | lo |= (*key++) >> 1; |
| 353 | lo <<= 7; |
| 354 | lo |= (*key++) >> 1; |
| 355 | lo <<= 7; |
| 356 | lo |= (*key++) >> 1; |
| 357 | hi = lo >> 4; |
| 358 | lo &= 0xf; |
| 359 | lo <<= 7; |
| 360 | lo |= (*key++) >> 1; |
| 361 | lo <<= 7; |
| 362 | lo |= (*key++) >> 1; |
| 363 | lo <<= 7; |
| 364 | lo |= (*key++) >> 1; |
| 365 | lo <<= 7; |
| 366 | lo |= (*key) >> 1; |
| 367 | |
| 368 | /* Use lower 32 bits for schedule, rotate by 11 each round (16 times) */ |
Al Viro | 3c50b36 | 2007-12-05 08:38:56 +0000 | [diff] [blame] | 369 | ctx->sched[0x0] = cpu_to_be32(lo); ror56(hi, lo, 11); |
| 370 | ctx->sched[0x1] = cpu_to_be32(lo); ror56(hi, lo, 11); |
| 371 | ctx->sched[0x2] = cpu_to_be32(lo); ror56(hi, lo, 11); |
| 372 | ctx->sched[0x3] = cpu_to_be32(lo); ror56(hi, lo, 11); |
| 373 | ctx->sched[0x4] = cpu_to_be32(lo); ror56(hi, lo, 11); |
| 374 | ctx->sched[0x5] = cpu_to_be32(lo); ror56(hi, lo, 11); |
| 375 | ctx->sched[0x6] = cpu_to_be32(lo); ror56(hi, lo, 11); |
| 376 | ctx->sched[0x7] = cpu_to_be32(lo); ror56(hi, lo, 11); |
| 377 | ctx->sched[0x8] = cpu_to_be32(lo); ror56(hi, lo, 11); |
| 378 | ctx->sched[0x9] = cpu_to_be32(lo); ror56(hi, lo, 11); |
| 379 | ctx->sched[0xa] = cpu_to_be32(lo); ror56(hi, lo, 11); |
| 380 | ctx->sched[0xb] = cpu_to_be32(lo); ror56(hi, lo, 11); |
| 381 | ctx->sched[0xc] = cpu_to_be32(lo); ror56(hi, lo, 11); |
| 382 | ctx->sched[0xd] = cpu_to_be32(lo); ror56(hi, lo, 11); |
| 383 | ctx->sched[0xe] = cpu_to_be32(lo); ror56(hi, lo, 11); |
| 384 | ctx->sched[0xf] = cpu_to_be32(lo); |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 385 | return 0; |
| 386 | #endif |
| 387 | } |
| 388 | |
| 389 | static struct crypto_alg fcrypt_alg = { |
| 390 | .cra_name = "fcrypt", |
Eric Biggers | d6ebf52 | 2019-06-02 22:40:57 -0700 | [diff] [blame] | 391 | .cra_driver_name = "fcrypt-generic", |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 392 | .cra_flags = CRYPTO_ALG_TYPE_CIPHER, |
| 393 | .cra_blocksize = 8, |
| 394 | .cra_ctxsize = sizeof(struct fcrypt_ctx), |
| 395 | .cra_module = THIS_MODULE, |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 396 | .cra_u = { .cipher = { |
| 397 | .cia_min_keysize = 8, |
| 398 | .cia_max_keysize = 8, |
| 399 | .cia_setkey = fcrypt_setkey, |
| 400 | .cia_encrypt = fcrypt_encrypt, |
| 401 | .cia_decrypt = fcrypt_decrypt } } |
| 402 | }; |
| 403 | |
Kamalesh Babulal | 3af5b90 | 2008-04-05 21:00:57 +0800 | [diff] [blame] | 404 | static int __init fcrypt_mod_init(void) |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 405 | { |
| 406 | return crypto_register_alg(&fcrypt_alg); |
| 407 | } |
| 408 | |
Kamalesh Babulal | 3af5b90 | 2008-04-05 21:00:57 +0800 | [diff] [blame] | 409 | static void __exit fcrypt_mod_fini(void) |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 410 | { |
| 411 | crypto_unregister_alg(&fcrypt_alg); |
| 412 | } |
| 413 | |
Eric Biggers | c4741b2 | 2019-04-11 21:57:42 -0700 | [diff] [blame] | 414 | subsys_initcall(fcrypt_mod_init); |
Kamalesh Babulal | 3af5b90 | 2008-04-05 21:00:57 +0800 | [diff] [blame] | 415 | module_exit(fcrypt_mod_fini); |
David Howells | 9083163 | 2006-12-16 12:13:14 +1100 | [diff] [blame] | 416 | |
| 417 | MODULE_LICENSE("Dual BSD/GPL"); |
| 418 | MODULE_DESCRIPTION("FCrypt Cipher Algorithm"); |
| 419 | MODULE_AUTHOR("David Howells <dhowells@redhat.com>"); |
Kees Cook | 5d26a10 | 2014-11-20 17:05:53 -0800 | [diff] [blame] | 420 | MODULE_ALIAS_CRYPTO("fcrypt"); |