Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 90831639 authored by David Howells's avatar David Howells Committed by Herbert Xu
Browse files

[CRYPTO] fcrypt: Add FCrypt from RxRPC 



Add a crypto module to provide FCrypt encryption as used by RxRPC.

Signed-Off-By: default avatarDavid Howells <dhowells@redhat.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 91652be5

crypto/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -204,6 +204,13 @@ config CRYPTO_DES_S390 
	help

	  DES cipher algorithm (FIPS 46-2), and Triple DES EDE (FIPS 46-3).



config CRYPTO_FCRYPT

	tristate "FCrypt cipher algorithm"

	select CRYPTO_ALGAPI

	select CRYPTO_BLKCIPHER

	help

	  FCrypt algorithm used by RxRPC.



config CRYPTO_BLOWFISH

	tristate "Blowfish cipher algorithm"

	select CRYPTO_ALGAPI

crypto/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -30,6 +30,7 @@ obj-$(CONFIG_CRYPTO_CBC) += cbc.o 
obj-$(CONFIG_CRYPTO_PCBC) += pcbc.o

obj-$(CONFIG_CRYPTO_LRW) += lrw.o

obj-$(CONFIG_CRYPTO_DES) += des.o

obj-$(CONFIG_CRYPTO_FCRYPT) += fcrypt.o

obj-$(CONFIG_CRYPTO_BLOWFISH) += blowfish.o

obj-$(CONFIG_CRYPTO_TWOFISH) += twofish.o

obj-$(CONFIG_CRYPTO_TWOFISH_COMMON) += twofish_common.o

crypto/fcrypt.c

0 → 100644
+423 −0
Original line number Diff line number Diff line 
/* 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 Hgskolan

 * (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 {

	u32 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) __constant_be32_to_cpu(x << 3)

static const u32 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) __constant_be32_to_cpu((x << 27) | (x >> 5))

static const u32 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) __constant_be32_to_cpu(x << 11)

static const u32 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) __constant_be32_to_cpu(x << 19)

static const u32 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 { u32 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 {

		u32 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 {

		u32 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] = be32_to_cpu(k); ror56_64(k, 11);

	ctx->sched[0x1] = be32_to_cpu(k); ror56_64(k, 11);

	ctx->sched[0x2] = be32_to_cpu(k); ror56_64(k, 11);

	ctx->sched[0x3] = be32_to_cpu(k); ror56_64(k, 11);

	ctx->sched[0x4] = be32_to_cpu(k); ror56_64(k, 11);

	ctx->sched[0x5] = be32_to_cpu(k); ror56_64(k, 11);

	ctx->sched[0x6] = be32_to_cpu(k); ror56_64(k, 11);

	ctx->sched[0x7] = be32_to_cpu(k); ror56_64(k, 11);

	ctx->sched[0x8] = be32_to_cpu(k); ror56_64(k, 11);

	ctx->sched[0x9] = be32_to_cpu(k); ror56_64(k, 11);

	ctx->sched[0xa] = be32_to_cpu(k); ror56_64(k, 11);

	ctx->sched[0xb] = be32_to_cpu(k); ror56_64(k, 11);

	ctx->sched[0xc] = be32_to_cpu(k); ror56_64(k, 11);

	ctx->sched[0xd] = be32_to_cpu(k); ror56_64(k, 11);

	ctx->sched[0xe] = be32_to_cpu(k); ror56_64(k, 11);

	ctx->sched[0xf] = be32_to_cpu(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] = be32_to_cpu(lo); ror56(hi, lo, 11);

	ctx->sched[0x1] = be32_to_cpu(lo); ror56(hi, lo, 11);

	ctx->sched[0x2] = be32_to_cpu(lo); ror56(hi, lo, 11);

	ctx->sched[0x3] = be32_to_cpu(lo); ror56(hi, lo, 11);

	ctx->sched[0x4] = be32_to_cpu(lo); ror56(hi, lo, 11);

	ctx->sched[0x5] = be32_to_cpu(lo); ror56(hi, lo, 11);

	ctx->sched[0x6] = be32_to_cpu(lo); ror56(hi, lo, 11);

	ctx->sched[0x7] = be32_to_cpu(lo); ror56(hi, lo, 11);

	ctx->sched[0x8] = be32_to_cpu(lo); ror56(hi, lo, 11);

	ctx->sched[0x9] = be32_to_cpu(lo); ror56(hi, lo, 11);

	ctx->sched[0xa] = be32_to_cpu(lo); ror56(hi, lo, 11);

	ctx->sched[0xb] = be32_to_cpu(lo); ror56(hi, lo, 11);

	ctx->sched[0xc] = be32_to_cpu(lo); ror56(hi, lo, 11);

	ctx->sched[0xd] = be32_to_cpu(lo); ror56(hi, lo, 11);

	ctx->sched[0xe] = be32_to_cpu(lo); ror56(hi, lo, 11);

	ctx->sched[0xf] = be32_to_cpu(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_list		=	LIST_HEAD_INIT(fcrypt_alg.cra_list),

	.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 init(void)

{

	return crypto_register_alg(&fcrypt_alg);

}



static void __exit fini(void)

{

	crypto_unregister_alg(&fcrypt_alg);

}



module_init(init);

module_exit(fini);



MODULE_LICENSE("Dual BSD/GPL");

MODULE_DESCRIPTION("FCrypt Cipher Algorithm");

MODULE_AUTHOR("David Howells <dhowells@redhat.com>");

crypto/tcrypt.c

+15 −1
Original line number Diff line number Diff line
@@ -72,7 +72,8 @@ static char *check[] = { 
	"des", "md5", "des3_ede", "rot13", "sha1", "sha256", "blowfish",

	"twofish", "serpent", "sha384", "sha512", "md4", "aes", "cast6",

	"arc4", "michael_mic", "deflate", "crc32c", "tea", "xtea",

	"khazad", "wp512", "wp384", "wp256", "tnepres", "xeta", NULL

	"khazad", "wp512", "wp384", "wp256", "tnepres", "xeta",  "fcrypt",

	NULL

};



static void hexdump(unsigned char *buf, unsigned int len)
@@ -965,6 +966,12 @@ static void do_test(void) 
		test_cipher("ecb(xeta)", DECRYPT, xeta_dec_tv_template,

			    XETA_DEC_TEST_VECTORS);



		//FCrypt

		test_cipher("pcbc(fcrypt)", ENCRYPT, fcrypt_pcbc_enc_tv_template,

			    FCRYPT_ENC_TEST_VECTORS);

		test_cipher("pcbc(fcrypt)", DECRYPT, fcrypt_pcbc_dec_tv_template,

			    FCRYPT_DEC_TEST_VECTORS);



		test_hash("sha384", sha384_tv_template, SHA384_TEST_VECTORS);

		test_hash("sha512", sha512_tv_template, SHA512_TEST_VECTORS);

		test_hash("wp512", wp512_tv_template, WP512_TEST_VECTORS);
@@ -1182,6 +1189,13 @@ static void do_test(void) 
			    XETA_DEC_TEST_VECTORS);

		break;



	case 31:

		test_cipher("pcbc(fcrypt)", ENCRYPT, fcrypt_pcbc_enc_tv_template,

			    FCRYPT_ENC_TEST_VECTORS);

		test_cipher("pcbc(fcrypt)", DECRYPT, fcrypt_pcbc_dec_tv_template,

			    FCRYPT_DEC_TEST_VECTORS);

		break;



	case 100:

		test_hash("hmac(md5)", hmac_md5_tv_template,

			  HMAC_MD5_TEST_VECTORS);

crypto/tcrypt.h

+128 −0

File changed.

Preview size limit exceeded, changes collapsed.