^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* FCrypt encryption algorithm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Written by David Howells (dhowells@redhat.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * This program is free software; you can redistribute it and/or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * modify it under the terms of the GNU General Public License
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * as published by the Free Software Foundation; either version
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * 2 of the License, or (at your option) any later version.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Based on code:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * Copyright (c) 1995 - 2000 Kungliga Tekniska Högskolan
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * (Royal Institute of Technology, Stockholm, Sweden).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * Redistribution and use in source and binary forms, with or without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * modification, are permitted provided that the following conditions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * are met:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * 1. Redistributions of source code must retain the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * notice, this list of conditions and the following disclaimer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * 2. Redistributions in binary form must reproduce the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * notice, this list of conditions and the following disclaimer in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * documentation and/or other materials provided with the distribution.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * 3. Neither the name of the Institute nor the names of its contributors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * may be used to endorse or promote products derived from this software
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * without specific prior written permission.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * SUCH DAMAGE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include <asm/byteorder.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #include <linux/crypto.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define ROUNDS 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct fcrypt_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) __be32 sched[ROUNDS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) /* Rotate right two 32 bit numbers as a 56 bit number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define ror56(hi, lo, n) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) u32 t = lo & ((1 << n) - 1); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) lo = (lo >> n) | ((hi & ((1 << n) - 1)) << (32 - n)); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) hi = (hi >> n) | (t << (24-n)); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) /* Rotate right one 64 bit number as a 56 bit number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define ror56_64(k, n) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) k = (k >> n) | ((k & ((1 << n) - 1)) << (56 - n)); \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * Sboxes for Feistel network derived from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * /afs/transarc.com/public/afsps/afs.rel31b.export-src/rxkad/sboxes.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) #undef Z
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) #define Z(x) cpu_to_be32(x << 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) static const __be32 sbox0[256] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) Z(0xea), Z(0x7f), Z(0xb2), Z(0x64), Z(0x9d), Z(0xb0), Z(0xd9), Z(0x11),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) Z(0xcd), Z(0x86), Z(0x86), Z(0x91), Z(0x0a), Z(0xb2), Z(0x93), Z(0x06),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) Z(0x0e), Z(0x06), Z(0xd2), Z(0x65), Z(0x73), Z(0xc5), Z(0x28), Z(0x60),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) Z(0xf2), Z(0x20), Z(0xb5), Z(0x38), Z(0x7e), Z(0xda), Z(0x9f), Z(0xe3),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) Z(0xd2), Z(0xcf), Z(0xc4), Z(0x3c), Z(0x61), Z(0xff), Z(0x4a), Z(0x4a),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) Z(0x35), Z(0xac), Z(0xaa), Z(0x5f), Z(0x2b), Z(0xbb), Z(0xbc), Z(0x53),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) Z(0x4e), Z(0x9d), Z(0x78), Z(0xa3), Z(0xdc), Z(0x09), Z(0x32), Z(0x10),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) Z(0xc6), Z(0x6f), Z(0x66), Z(0xd6), Z(0xab), Z(0xa9), Z(0xaf), Z(0xfd),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) Z(0x3b), Z(0x95), Z(0xe8), Z(0x34), Z(0x9a), Z(0x81), Z(0x72), Z(0x80),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) Z(0x9c), Z(0xf3), Z(0xec), Z(0xda), Z(0x9f), Z(0x26), Z(0x76), Z(0x15),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) Z(0x3e), Z(0x55), Z(0x4d), Z(0xde), Z(0x84), Z(0xee), Z(0xad), Z(0xc7),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) Z(0xf1), Z(0x6b), Z(0x3d), Z(0xd3), Z(0x04), Z(0x49), Z(0xaa), Z(0x24),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) Z(0x0b), Z(0x8a), Z(0x83), Z(0xba), Z(0xfa), Z(0x85), Z(0xa0), Z(0xa8),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) Z(0xb1), Z(0xd4), Z(0x01), Z(0xd8), Z(0x70), Z(0x64), Z(0xf0), Z(0x51),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) Z(0xd2), Z(0xc3), Z(0xa7), Z(0x75), Z(0x8c), Z(0xa5), Z(0x64), Z(0xef),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) Z(0x10), Z(0x4e), Z(0xb7), Z(0xc6), Z(0x61), Z(0x03), Z(0xeb), Z(0x44),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) Z(0x3d), Z(0xe5), Z(0xb3), Z(0x5b), Z(0xae), Z(0xd5), Z(0xad), Z(0x1d),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) Z(0xfa), Z(0x5a), Z(0x1e), Z(0x33), Z(0xab), Z(0x93), Z(0xa2), Z(0xb7),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) Z(0xe7), Z(0xa8), Z(0x45), Z(0xa4), Z(0xcd), Z(0x29), Z(0x63), Z(0x44),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) Z(0xb6), Z(0x69), Z(0x7e), Z(0x2e), Z(0x62), Z(0x03), Z(0xc8), Z(0xe0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) Z(0x17), Z(0xbb), Z(0xc7), Z(0xf3), Z(0x3f), Z(0x36), Z(0xba), Z(0x71),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) Z(0x8e), Z(0x97), Z(0x65), Z(0x60), Z(0x69), Z(0xb6), Z(0xf6), Z(0xe6),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) Z(0x6e), Z(0xe0), Z(0x81), Z(0x59), Z(0xe8), Z(0xaf), Z(0xdd), Z(0x95),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) Z(0x22), Z(0x99), Z(0xfd), Z(0x63), Z(0x19), Z(0x74), Z(0x61), Z(0xb1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) Z(0xb6), Z(0x5b), Z(0xae), Z(0x54), Z(0xb3), Z(0x70), Z(0xff), Z(0xc6),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) Z(0x3b), Z(0x3e), Z(0xc1), Z(0xd7), Z(0xe1), Z(0x0e), Z(0x76), Z(0xe5),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) Z(0x36), Z(0x4f), Z(0x59), Z(0xc7), Z(0x08), Z(0x6e), Z(0x82), Z(0xa6),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) Z(0x93), Z(0xc4), Z(0xaa), Z(0x26), Z(0x49), Z(0xe0), Z(0x21), Z(0x64),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) Z(0x07), Z(0x9f), Z(0x64), Z(0x81), Z(0x9c), Z(0xbf), Z(0xf9), Z(0xd1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) Z(0x43), Z(0xf8), Z(0xb6), Z(0xb9), Z(0xf1), Z(0x24), Z(0x75), Z(0x03),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) Z(0xe4), Z(0xb0), Z(0x99), Z(0x46), Z(0x3d), Z(0xf5), Z(0xd1), Z(0x39),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) Z(0x72), Z(0x12), Z(0xf6), Z(0xba), Z(0x0c), Z(0x0d), Z(0x42), Z(0x2e)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #undef Z
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #define Z(x) cpu_to_be32(((x & 0x1f) << 27) | (x >> 5))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static const __be32 sbox1[256] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) Z(0x77), Z(0x14), Z(0xa6), Z(0xfe), Z(0xb2), Z(0x5e), Z(0x8c), Z(0x3e),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) Z(0x67), Z(0x6c), Z(0xa1), Z(0x0d), Z(0xc2), Z(0xa2), Z(0xc1), Z(0x85),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) Z(0x6c), Z(0x7b), Z(0x67), Z(0xc6), Z(0x23), Z(0xe3), Z(0xf2), Z(0x89),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) Z(0x50), Z(0x9c), Z(0x03), Z(0xb7), Z(0x73), Z(0xe6), Z(0xe1), Z(0x39),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) Z(0x31), Z(0x2c), Z(0x27), Z(0x9f), Z(0xa5), Z(0x69), Z(0x44), Z(0xd6),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) Z(0x23), Z(0x83), Z(0x98), Z(0x7d), Z(0x3c), Z(0xb4), Z(0x2d), Z(0x99),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) Z(0x1c), Z(0x1f), Z(0x8c), Z(0x20), Z(0x03), Z(0x7c), Z(0x5f), Z(0xad),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) Z(0xf4), Z(0xfa), Z(0x95), Z(0xca), Z(0x76), Z(0x44), Z(0xcd), Z(0xb6),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) Z(0xb8), Z(0xa1), Z(0xa1), Z(0xbe), Z(0x9e), Z(0x54), Z(0x8f), Z(0x0b),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) Z(0x16), Z(0x74), Z(0x31), Z(0x8a), Z(0x23), Z(0x17), Z(0x04), Z(0xfa),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) Z(0x79), Z(0x84), Z(0xb1), Z(0xf5), Z(0x13), Z(0xab), Z(0xb5), Z(0x2e),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) Z(0xaa), Z(0x0c), Z(0x60), Z(0x6b), Z(0x5b), Z(0xc4), Z(0x4b), Z(0xbc),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) Z(0xe2), Z(0xaf), Z(0x45), Z(0x73), Z(0xfa), Z(0xc9), Z(0x49), Z(0xcd),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) Z(0x00), Z(0x92), Z(0x7d), Z(0x97), Z(0x7a), Z(0x18), Z(0x60), Z(0x3d),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) Z(0xcf), Z(0x5b), Z(0xde), Z(0xc6), Z(0xe2), Z(0xe6), Z(0xbb), Z(0x8b),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) Z(0x06), Z(0xda), Z(0x08), Z(0x15), Z(0x1b), Z(0x88), Z(0x6a), Z(0x17),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) Z(0x89), Z(0xd0), Z(0xa9), Z(0xc1), Z(0xc9), Z(0x70), Z(0x6b), Z(0xe5),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) Z(0x43), Z(0xf4), Z(0x68), Z(0xc8), Z(0xd3), Z(0x84), Z(0x28), Z(0x0a),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) Z(0x52), Z(0x66), Z(0xa3), Z(0xca), Z(0xf2), Z(0xe3), Z(0x7f), Z(0x7a),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) Z(0x31), Z(0xf7), Z(0x88), Z(0x94), Z(0x5e), Z(0x9c), Z(0x63), Z(0xd5),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) Z(0x24), Z(0x66), Z(0xfc), Z(0xb3), Z(0x57), Z(0x25), Z(0xbe), Z(0x89),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) Z(0x44), Z(0xc4), Z(0xe0), Z(0x8f), Z(0x23), Z(0x3c), Z(0x12), Z(0x52),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) Z(0xf5), Z(0x1e), Z(0xf4), Z(0xcb), Z(0x18), Z(0x33), Z(0x1f), Z(0xf8),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) Z(0x69), Z(0x10), Z(0x9d), Z(0xd3), Z(0xf7), Z(0x28), Z(0xf8), Z(0x30),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) Z(0x05), Z(0x5e), Z(0x32), Z(0xc0), Z(0xd5), Z(0x19), Z(0xbd), Z(0x45),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) Z(0x8b), Z(0x5b), Z(0xfd), Z(0xbc), Z(0xe2), Z(0x5c), Z(0xa9), Z(0x96),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) Z(0xef), Z(0x70), Z(0xcf), Z(0xc2), Z(0x2a), Z(0xb3), Z(0x61), Z(0xad),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) Z(0x80), Z(0x48), Z(0x81), Z(0xb7), Z(0x1d), Z(0x43), Z(0xd9), Z(0xd7),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) Z(0x45), Z(0xf0), Z(0xd8), Z(0x8a), Z(0x59), Z(0x7c), Z(0x57), Z(0xc1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) Z(0x79), Z(0xc7), Z(0x34), Z(0xd6), Z(0x43), Z(0xdf), Z(0xe4), Z(0x78),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) Z(0x16), Z(0x06), Z(0xda), Z(0x92), Z(0x76), Z(0x51), Z(0xe1), Z(0xd4),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) Z(0x70), Z(0x03), Z(0xe0), Z(0x2f), Z(0x96), Z(0x91), Z(0x82), Z(0x80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) #undef Z
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) #define Z(x) cpu_to_be32(x << 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) static const __be32 sbox2[256] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) Z(0xf0), Z(0x37), Z(0x24), Z(0x53), Z(0x2a), Z(0x03), Z(0x83), Z(0x86),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) Z(0xd1), Z(0xec), Z(0x50), Z(0xf0), Z(0x42), Z(0x78), Z(0x2f), Z(0x6d),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) Z(0xbf), Z(0x80), Z(0x87), Z(0x27), Z(0x95), Z(0xe2), Z(0xc5), Z(0x5d),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) Z(0xf9), Z(0x6f), Z(0xdb), Z(0xb4), Z(0x65), Z(0x6e), Z(0xe7), Z(0x24),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) Z(0xc8), Z(0x1a), Z(0xbb), Z(0x49), Z(0xb5), Z(0x0a), Z(0x7d), Z(0xb9),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) Z(0xe8), Z(0xdc), Z(0xb7), Z(0xd9), Z(0x45), Z(0x20), Z(0x1b), Z(0xce),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) Z(0x59), Z(0x9d), Z(0x6b), Z(0xbd), Z(0x0e), Z(0x8f), Z(0xa3), Z(0xa9),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) Z(0xbc), Z(0x74), Z(0xa6), Z(0xf6), Z(0x7f), Z(0x5f), Z(0xb1), Z(0x68),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) Z(0x84), Z(0xbc), Z(0xa9), Z(0xfd), Z(0x55), Z(0x50), Z(0xe9), Z(0xb6),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) Z(0x13), Z(0x5e), Z(0x07), Z(0xb8), Z(0x95), Z(0x02), Z(0xc0), Z(0xd0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) Z(0x6a), Z(0x1a), Z(0x85), Z(0xbd), Z(0xb6), Z(0xfd), Z(0xfe), Z(0x17),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) Z(0x3f), Z(0x09), Z(0xa3), Z(0x8d), Z(0xfb), Z(0xed), Z(0xda), Z(0x1d),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) Z(0x6d), Z(0x1c), Z(0x6c), Z(0x01), Z(0x5a), Z(0xe5), Z(0x71), Z(0x3e),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) Z(0x8b), Z(0x6b), Z(0xbe), Z(0x29), Z(0xeb), Z(0x12), Z(0x19), Z(0x34),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) Z(0xcd), Z(0xb3), Z(0xbd), Z(0x35), Z(0xea), Z(0x4b), Z(0xd5), Z(0xae),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) Z(0x2a), Z(0x79), Z(0x5a), Z(0xa5), Z(0x32), Z(0x12), Z(0x7b), Z(0xdc),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) Z(0x2c), Z(0xd0), Z(0x22), Z(0x4b), Z(0xb1), Z(0x85), Z(0x59), Z(0x80),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) Z(0xc0), Z(0x30), Z(0x9f), Z(0x73), Z(0xd3), Z(0x14), Z(0x48), Z(0x40),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) Z(0x07), Z(0x2d), Z(0x8f), Z(0x80), Z(0x0f), Z(0xce), Z(0x0b), Z(0x5e),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) Z(0xb7), Z(0x5e), Z(0xac), Z(0x24), Z(0x94), Z(0x4a), Z(0x18), Z(0x15),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) Z(0x05), Z(0xe8), Z(0x02), Z(0x77), Z(0xa9), Z(0xc7), Z(0x40), Z(0x45),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) Z(0x89), Z(0xd1), Z(0xea), Z(0xde), Z(0x0c), Z(0x79), Z(0x2a), Z(0x99),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) Z(0x6c), Z(0x3e), Z(0x95), Z(0xdd), Z(0x8c), Z(0x7d), Z(0xad), Z(0x6f),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) Z(0xdc), Z(0xff), Z(0xfd), Z(0x62), Z(0x47), Z(0xb3), Z(0x21), Z(0x8a),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) Z(0xec), Z(0x8e), Z(0x19), Z(0x18), Z(0xb4), Z(0x6e), Z(0x3d), Z(0xfd),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) Z(0x74), Z(0x54), Z(0x1e), Z(0x04), Z(0x85), Z(0xd8), Z(0xbc), Z(0x1f),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) Z(0x56), Z(0xe7), Z(0x3a), Z(0x56), Z(0x67), Z(0xd6), Z(0xc8), Z(0xa5),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) Z(0xf3), Z(0x8e), Z(0xde), Z(0xae), Z(0x37), Z(0x49), Z(0xb7), Z(0xfa),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) Z(0xc8), Z(0xf4), Z(0x1f), Z(0xe0), Z(0x2a), Z(0x9b), Z(0x15), Z(0xd1),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) Z(0x34), Z(0x0e), Z(0xb5), Z(0xe0), Z(0x44), Z(0x78), Z(0x84), Z(0x59),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) Z(0x56), Z(0x68), Z(0x77), Z(0xa5), Z(0x14), Z(0x06), Z(0xf5), Z(0x2f),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) Z(0x8c), Z(0x8a), Z(0x73), Z(0x80), Z(0x76), Z(0xb4), Z(0x10), Z(0x86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) #undef Z
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) #define Z(x) cpu_to_be32(x << 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) static const __be32 sbox3[256] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) Z(0xa9), Z(0x2a), Z(0x48), Z(0x51), Z(0x84), Z(0x7e), Z(0x49), Z(0xe2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) Z(0xb5), Z(0xb7), Z(0x42), Z(0x33), Z(0x7d), Z(0x5d), Z(0xa6), Z(0x12),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) Z(0x44), Z(0x48), Z(0x6d), Z(0x28), Z(0xaa), Z(0x20), Z(0x6d), Z(0x57),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) Z(0xd6), Z(0x6b), Z(0x5d), Z(0x72), Z(0xf0), Z(0x92), Z(0x5a), Z(0x1b),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) Z(0x53), Z(0x80), Z(0x24), Z(0x70), Z(0x9a), Z(0xcc), Z(0xa7), Z(0x66),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) Z(0xa1), Z(0x01), Z(0xa5), Z(0x41), Z(0x97), Z(0x41), Z(0x31), Z(0x82),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) Z(0xf1), Z(0x14), Z(0xcf), Z(0x53), Z(0x0d), Z(0xa0), Z(0x10), Z(0xcc),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) Z(0x2a), Z(0x7d), Z(0xd2), Z(0xbf), Z(0x4b), Z(0x1a), Z(0xdb), Z(0x16),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) Z(0x47), Z(0xf6), Z(0x51), Z(0x36), Z(0xed), Z(0xf3), Z(0xb9), Z(0x1a),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) Z(0xa7), Z(0xdf), Z(0x29), Z(0x43), Z(0x01), Z(0x54), Z(0x70), Z(0xa4),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) Z(0xbf), Z(0xd4), Z(0x0b), Z(0x53), Z(0x44), Z(0x60), Z(0x9e), Z(0x23),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) Z(0xa1), Z(0x18), Z(0x68), Z(0x4f), Z(0xf0), Z(0x2f), Z(0x82), Z(0xc2),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) Z(0x2a), Z(0x41), Z(0xb2), Z(0x42), Z(0x0c), Z(0xed), Z(0x0c), Z(0x1d),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) Z(0x13), Z(0x3a), Z(0x3c), Z(0x6e), Z(0x35), Z(0xdc), Z(0x60), Z(0x65),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) Z(0x85), Z(0xe9), Z(0x64), Z(0x02), Z(0x9a), Z(0x3f), Z(0x9f), Z(0x87),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) Z(0x96), Z(0xdf), Z(0xbe), Z(0xf2), Z(0xcb), Z(0xe5), Z(0x6c), Z(0xd4),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) Z(0x5a), Z(0x83), Z(0xbf), Z(0x92), Z(0x1b), Z(0x94), Z(0x00), Z(0x42),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) Z(0xcf), Z(0x4b), Z(0x00), Z(0x75), Z(0xba), Z(0x8f), Z(0x76), Z(0x5f),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) Z(0x5d), Z(0x3a), Z(0x4d), Z(0x09), Z(0x12), Z(0x08), Z(0x38), Z(0x95),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) Z(0x17), Z(0xe4), Z(0x01), Z(0x1d), Z(0x4c), Z(0xa9), Z(0xcc), Z(0x85),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) Z(0x82), Z(0x4c), Z(0x9d), Z(0x2f), Z(0x3b), Z(0x66), Z(0xa1), Z(0x34),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) Z(0x10), Z(0xcd), Z(0x59), Z(0x89), Z(0xa5), Z(0x31), Z(0xcf), Z(0x05),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) Z(0xc8), Z(0x84), Z(0xfa), Z(0xc7), Z(0xba), Z(0x4e), Z(0x8b), Z(0x1a),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) Z(0x19), Z(0xf1), Z(0xa1), Z(0x3b), Z(0x18), Z(0x12), Z(0x17), Z(0xb0),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) Z(0x98), Z(0x8d), Z(0x0b), Z(0x23), Z(0xc3), Z(0x3a), Z(0x2d), Z(0x20),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) Z(0xdf), Z(0x13), Z(0xa0), Z(0xa8), Z(0x4c), Z(0x0d), Z(0x6c), Z(0x2f),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) Z(0x47), Z(0x13), Z(0x13), Z(0x52), Z(0x1f), Z(0x2d), Z(0xf5), Z(0x79),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) Z(0x3d), Z(0xa2), Z(0x54), Z(0xbd), Z(0x69), Z(0xc8), Z(0x6b), Z(0xf3),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) Z(0x05), Z(0x28), Z(0xf1), Z(0x16), Z(0x46), Z(0x40), Z(0xb0), Z(0x11),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) Z(0xd3), Z(0xb7), Z(0x95), Z(0x49), Z(0xcf), Z(0xc3), Z(0x1d), Z(0x8f),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) Z(0xd8), Z(0xe1), Z(0x73), Z(0xdb), Z(0xad), Z(0xc8), Z(0xc9), Z(0xa9),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) Z(0xa1), Z(0xc2), Z(0xc5), Z(0xe3), Z(0xba), Z(0xfc), Z(0x0e), Z(0x25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) * This is a 16 round Feistel network with permutation F_ENCRYPT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) #define F_ENCRYPT(R, L, sched) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) union lc4 { __be32 l; u8 c[4]; } u; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) u.l = sched ^ R; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) L ^= sbox0[u.c[0]] ^ sbox1[u.c[1]] ^ sbox2[u.c[2]] ^ sbox3[u.c[3]]; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) * encryptor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) static void fcrypt_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) const struct fcrypt_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) __be32 l, r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) } X;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) memcpy(&X, src, sizeof(X));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) F_ENCRYPT(X.r, X.l, ctx->sched[0x0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) F_ENCRYPT(X.l, X.r, ctx->sched[0x1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) F_ENCRYPT(X.r, X.l, ctx->sched[0x2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) F_ENCRYPT(X.l, X.r, ctx->sched[0x3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) F_ENCRYPT(X.r, X.l, ctx->sched[0x4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) F_ENCRYPT(X.l, X.r, ctx->sched[0x5]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) F_ENCRYPT(X.r, X.l, ctx->sched[0x6]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) F_ENCRYPT(X.l, X.r, ctx->sched[0x7]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) F_ENCRYPT(X.r, X.l, ctx->sched[0x8]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) F_ENCRYPT(X.l, X.r, ctx->sched[0x9]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) F_ENCRYPT(X.r, X.l, ctx->sched[0xa]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) F_ENCRYPT(X.l, X.r, ctx->sched[0xb]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) F_ENCRYPT(X.r, X.l, ctx->sched[0xc]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) F_ENCRYPT(X.l, X.r, ctx->sched[0xd]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) F_ENCRYPT(X.r, X.l, ctx->sched[0xe]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) F_ENCRYPT(X.l, X.r, ctx->sched[0xf]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) memcpy(dst, &X, sizeof(X));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) * decryptor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) static void fcrypt_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) const struct fcrypt_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) __be32 l, r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) } X;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) memcpy(&X, src, sizeof(X));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) F_ENCRYPT(X.l, X.r, ctx->sched[0xf]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) F_ENCRYPT(X.r, X.l, ctx->sched[0xe]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) F_ENCRYPT(X.l, X.r, ctx->sched[0xd]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) F_ENCRYPT(X.r, X.l, ctx->sched[0xc]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) F_ENCRYPT(X.l, X.r, ctx->sched[0xb]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) F_ENCRYPT(X.r, X.l, ctx->sched[0xa]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) F_ENCRYPT(X.l, X.r, ctx->sched[0x9]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) F_ENCRYPT(X.r, X.l, ctx->sched[0x8]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) F_ENCRYPT(X.l, X.r, ctx->sched[0x7]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) F_ENCRYPT(X.r, X.l, ctx->sched[0x6]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) F_ENCRYPT(X.l, X.r, ctx->sched[0x5]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) F_ENCRYPT(X.r, X.l, ctx->sched[0x4]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) F_ENCRYPT(X.l, X.r, ctx->sched[0x3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) F_ENCRYPT(X.r, X.l, ctx->sched[0x2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) F_ENCRYPT(X.l, X.r, ctx->sched[0x1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) F_ENCRYPT(X.r, X.l, ctx->sched[0x0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) memcpy(dst, &X, sizeof(X));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) * Generate a key schedule from key, the least significant bit in each key byte
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) * is parity and shall be ignored. This leaves 56 significant bits in the key
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) * to scatter over the 16 key schedules. For each schedule extract the low
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) * order 32 bits and use as schedule, then rotate right by 11 bits.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) static int fcrypt_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) struct fcrypt_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) #if BITS_PER_LONG == 64 /* the 64-bit version can also be used for 32-bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * kernels - it seems to be faster but the code is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) * larger */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) u64 k; /* k holds all 56 non-parity bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) /* discard the parity bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) k = (*key++) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) k <<= 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) k |= (*key++) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) k <<= 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) k |= (*key++) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) k <<= 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) k |= (*key++) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) k <<= 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) k |= (*key++) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) k <<= 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) k |= (*key++) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) k <<= 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) k |= (*key++) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) k <<= 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) k |= (*key) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) /* Use lower 32 bits for schedule, rotate by 11 each round (16 times) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) ctx->sched[0x0] = cpu_to_be32(k); ror56_64(k, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) ctx->sched[0x1] = cpu_to_be32(k); ror56_64(k, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) ctx->sched[0x2] = cpu_to_be32(k); ror56_64(k, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) ctx->sched[0x3] = cpu_to_be32(k); ror56_64(k, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) ctx->sched[0x4] = cpu_to_be32(k); ror56_64(k, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) ctx->sched[0x5] = cpu_to_be32(k); ror56_64(k, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) ctx->sched[0x6] = cpu_to_be32(k); ror56_64(k, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) ctx->sched[0x7] = cpu_to_be32(k); ror56_64(k, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) ctx->sched[0x8] = cpu_to_be32(k); ror56_64(k, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) ctx->sched[0x9] = cpu_to_be32(k); ror56_64(k, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) ctx->sched[0xa] = cpu_to_be32(k); ror56_64(k, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) ctx->sched[0xb] = cpu_to_be32(k); ror56_64(k, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) ctx->sched[0xc] = cpu_to_be32(k); ror56_64(k, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) ctx->sched[0xd] = cpu_to_be32(k); ror56_64(k, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) ctx->sched[0xe] = cpu_to_be32(k); ror56_64(k, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) ctx->sched[0xf] = cpu_to_be32(k);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) u32 hi, lo; /* hi is upper 24 bits and lo lower 32, total 56 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) /* discard the parity bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) lo = (*key++) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) lo <<= 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) lo |= (*key++) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) lo <<= 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) lo |= (*key++) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) lo <<= 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) lo |= (*key++) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) hi = lo >> 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) lo &= 0xf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) lo <<= 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) lo |= (*key++) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) lo <<= 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) lo |= (*key++) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) lo <<= 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) lo |= (*key++) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) lo <<= 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) lo |= (*key) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) /* Use lower 32 bits for schedule, rotate by 11 each round (16 times) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) ctx->sched[0x0] = cpu_to_be32(lo); ror56(hi, lo, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) ctx->sched[0x1] = cpu_to_be32(lo); ror56(hi, lo, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) ctx->sched[0x2] = cpu_to_be32(lo); ror56(hi, lo, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) ctx->sched[0x3] = cpu_to_be32(lo); ror56(hi, lo, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) ctx->sched[0x4] = cpu_to_be32(lo); ror56(hi, lo, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) ctx->sched[0x5] = cpu_to_be32(lo); ror56(hi, lo, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) ctx->sched[0x6] = cpu_to_be32(lo); ror56(hi, lo, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) ctx->sched[0x7] = cpu_to_be32(lo); ror56(hi, lo, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) ctx->sched[0x8] = cpu_to_be32(lo); ror56(hi, lo, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) ctx->sched[0x9] = cpu_to_be32(lo); ror56(hi, lo, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) ctx->sched[0xa] = cpu_to_be32(lo); ror56(hi, lo, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) ctx->sched[0xb] = cpu_to_be32(lo); ror56(hi, lo, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) ctx->sched[0xc] = cpu_to_be32(lo); ror56(hi, lo, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) ctx->sched[0xd] = cpu_to_be32(lo); ror56(hi, lo, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) ctx->sched[0xe] = cpu_to_be32(lo); ror56(hi, lo, 11);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) ctx->sched[0xf] = cpu_to_be32(lo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) static struct crypto_alg fcrypt_alg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) .cra_name = "fcrypt",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) .cra_driver_name = "fcrypt-generic",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) .cra_blocksize = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) .cra_ctxsize = sizeof(struct fcrypt_ctx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) .cra_module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) .cra_alignmask = 3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) .cra_u = { .cipher = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) .cia_min_keysize = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) .cia_max_keysize = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) .cia_setkey = fcrypt_setkey,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) .cia_encrypt = fcrypt_encrypt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) .cia_decrypt = fcrypt_decrypt } }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) static int __init fcrypt_mod_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) return crypto_register_alg(&fcrypt_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) static void __exit fcrypt_mod_fini(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) crypto_unregister_alg(&fcrypt_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) subsys_initcall(fcrypt_mod_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) module_exit(fcrypt_mod_fini);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) MODULE_LICENSE("Dual BSD/GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) MODULE_DESCRIPTION("FCrypt Cipher Algorithm");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) MODULE_AUTHOR("David Howells <dhowells@redhat.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) MODULE_ALIAS_CRYPTO("fcrypt");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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