477 lines
14 KiB
C
477 lines
14 KiB
C
/*
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* DES and 3DES-EDE ciphers
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*
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* Modifications to LibTomCrypt implementation:
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* Copyright (c) 2006, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include "includes.h"
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#include "common.h"
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#include "crypto.h"
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#ifdef INTERNAL_DES
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/*
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* This implementation is based on a DES implementation included in
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* LibTomCrypt. The version here is modified to fit in wpa_supplicant/hostapd
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* coding style.
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*/
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*
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* Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com
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*/
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/**
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DES code submitted by Dobes Vandermeer
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*/
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#define ROLc(x, y) \
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((((unsigned long) (x) << (unsigned long) ((y) & 31)) | \
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(((unsigned long) (x) & 0xFFFFFFFFUL) >> \
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(unsigned long) (32 - ((y) & 31)))) & 0xFFFFFFFFUL)
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#define RORc(x, y) \
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(((((unsigned long) (x) & 0xFFFFFFFFUL) >> \
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(unsigned long) ((y) & 31)) | \
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((unsigned long) (x) << (unsigned long) (32 - ((y) & 31)))) & \
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0xFFFFFFFFUL)
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static const u32 bytebit[8] =
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{
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0200, 0100, 040, 020, 010, 04, 02, 01
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};
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static const u32 bigbyte[24] =
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{
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0x800000UL, 0x400000UL, 0x200000UL, 0x100000UL,
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0x80000UL, 0x40000UL, 0x20000UL, 0x10000UL,
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0x8000UL, 0x4000UL, 0x2000UL, 0x1000UL,
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0x800UL, 0x400UL, 0x200UL, 0x100UL,
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0x80UL, 0x40UL, 0x20UL, 0x10UL,
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0x8UL, 0x4UL, 0x2UL, 0x1L
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};
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/* Use the key schedule specific in the standard (ANSI X3.92-1981) */
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static const u8 pc1[56] = {
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56, 48, 40, 32, 24, 16, 8, 0, 57, 49, 41, 33, 25, 17,
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9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35,
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62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21,
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13, 5, 60, 52, 44, 36, 28, 20, 12, 4, 27, 19, 11, 3
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};
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static const u8 totrot[16] = {
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1, 2, 4, 6,
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8, 10, 12, 14,
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15, 17, 19, 21,
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23, 25, 27, 28
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};
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static const u8 pc2[48] = {
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13, 16, 10, 23, 0, 4, 2, 27, 14, 5, 20, 9,
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22, 18, 11, 3, 25, 7, 15, 6, 26, 19, 12, 1,
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40, 51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47,
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43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31
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};
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static const u32 SP1[64] =
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{
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0x01010400UL, 0x00000000UL, 0x00010000UL, 0x01010404UL,
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0x01010004UL, 0x00010404UL, 0x00000004UL, 0x00010000UL,
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0x00000400UL, 0x01010400UL, 0x01010404UL, 0x00000400UL,
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0x01000404UL, 0x01010004UL, 0x01000000UL, 0x00000004UL,
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0x00000404UL, 0x01000400UL, 0x01000400UL, 0x00010400UL,
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0x00010400UL, 0x01010000UL, 0x01010000UL, 0x01000404UL,
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0x00010004UL, 0x01000004UL, 0x01000004UL, 0x00010004UL,
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0x00000000UL, 0x00000404UL, 0x00010404UL, 0x01000000UL,
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0x00010000UL, 0x01010404UL, 0x00000004UL, 0x01010000UL,
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0x01010400UL, 0x01000000UL, 0x01000000UL, 0x00000400UL,
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0x01010004UL, 0x00010000UL, 0x00010400UL, 0x01000004UL,
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0x00000400UL, 0x00000004UL, 0x01000404UL, 0x00010404UL,
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0x01010404UL, 0x00010004UL, 0x01010000UL, 0x01000404UL,
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0x01000004UL, 0x00000404UL, 0x00010404UL, 0x01010400UL,
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0x00000404UL, 0x01000400UL, 0x01000400UL, 0x00000000UL,
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0x00010004UL, 0x00010400UL, 0x00000000UL, 0x01010004UL
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};
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static const u32 SP2[64] =
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{
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0x80108020UL, 0x80008000UL, 0x00008000UL, 0x00108020UL,
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0x00100000UL, 0x00000020UL, 0x80100020UL, 0x80008020UL,
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0x80000020UL, 0x80108020UL, 0x80108000UL, 0x80000000UL,
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0x80008000UL, 0x00100000UL, 0x00000020UL, 0x80100020UL,
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0x00108000UL, 0x00100020UL, 0x80008020UL, 0x00000000UL,
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0x80000000UL, 0x00008000UL, 0x00108020UL, 0x80100000UL,
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0x00100020UL, 0x80000020UL, 0x00000000UL, 0x00108000UL,
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0x00008020UL, 0x80108000UL, 0x80100000UL, 0x00008020UL,
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0x00000000UL, 0x00108020UL, 0x80100020UL, 0x00100000UL,
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0x80008020UL, 0x80100000UL, 0x80108000UL, 0x00008000UL,
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0x80100000UL, 0x80008000UL, 0x00000020UL, 0x80108020UL,
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0x00108020UL, 0x00000020UL, 0x00008000UL, 0x80000000UL,
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0x00008020UL, 0x80108000UL, 0x00100000UL, 0x80000020UL,
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0x00100020UL, 0x80008020UL, 0x80000020UL, 0x00100020UL,
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0x00108000UL, 0x00000000UL, 0x80008000UL, 0x00008020UL,
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0x80000000UL, 0x80100020UL, 0x80108020UL, 0x00108000UL
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};
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static const u32 SP3[64] =
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{
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0x00000208UL, 0x08020200UL, 0x00000000UL, 0x08020008UL,
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0x08000200UL, 0x00000000UL, 0x00020208UL, 0x08000200UL,
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0x00020008UL, 0x08000008UL, 0x08000008UL, 0x00020000UL,
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0x08020208UL, 0x00020008UL, 0x08020000UL, 0x00000208UL,
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0x08000000UL, 0x00000008UL, 0x08020200UL, 0x00000200UL,
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0x00020200UL, 0x08020000UL, 0x08020008UL, 0x00020208UL,
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0x08000208UL, 0x00020200UL, 0x00020000UL, 0x08000208UL,
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0x00000008UL, 0x08020208UL, 0x00000200UL, 0x08000000UL,
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0x08020200UL, 0x08000000UL, 0x00020008UL, 0x00000208UL,
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0x00020000UL, 0x08020200UL, 0x08000200UL, 0x00000000UL,
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0x00000200UL, 0x00020008UL, 0x08020208UL, 0x08000200UL,
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0x08000008UL, 0x00000200UL, 0x00000000UL, 0x08020008UL,
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0x08000208UL, 0x00020000UL, 0x08000000UL, 0x08020208UL,
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0x00000008UL, 0x00020208UL, 0x00020200UL, 0x08000008UL,
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0x08020000UL, 0x08000208UL, 0x00000208UL, 0x08020000UL,
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0x00020208UL, 0x00000008UL, 0x08020008UL, 0x00020200UL
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};
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static const u32 SP4[64] =
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{
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0x00802001UL, 0x00002081UL, 0x00002081UL, 0x00000080UL,
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0x00802080UL, 0x00800081UL, 0x00800001UL, 0x00002001UL,
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0x00000000UL, 0x00802000UL, 0x00802000UL, 0x00802081UL,
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0x00000081UL, 0x00000000UL, 0x00800080UL, 0x00800001UL,
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0x00000001UL, 0x00002000UL, 0x00800000UL, 0x00802001UL,
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0x00000080UL, 0x00800000UL, 0x00002001UL, 0x00002080UL,
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0x00800081UL, 0x00000001UL, 0x00002080UL, 0x00800080UL,
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0x00002000UL, 0x00802080UL, 0x00802081UL, 0x00000081UL,
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0x00800080UL, 0x00800001UL, 0x00802000UL, 0x00802081UL,
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0x00000081UL, 0x00000000UL, 0x00000000UL, 0x00802000UL,
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0x00002080UL, 0x00800080UL, 0x00800081UL, 0x00000001UL,
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0x00802001UL, 0x00002081UL, 0x00002081UL, 0x00000080UL,
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0x00802081UL, 0x00000081UL, 0x00000001UL, 0x00002000UL,
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0x00800001UL, 0x00002001UL, 0x00802080UL, 0x00800081UL,
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0x00002001UL, 0x00002080UL, 0x00800000UL, 0x00802001UL,
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0x00000080UL, 0x00800000UL, 0x00002000UL, 0x00802080UL
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};
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static const u32 SP5[64] =
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{
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0x00000100UL, 0x02080100UL, 0x02080000UL, 0x42000100UL,
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0x00080000UL, 0x00000100UL, 0x40000000UL, 0x02080000UL,
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0x40080100UL, 0x00080000UL, 0x02000100UL, 0x40080100UL,
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0x42000100UL, 0x42080000UL, 0x00080100UL, 0x40000000UL,
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0x02000000UL, 0x40080000UL, 0x40080000UL, 0x00000000UL,
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0x40000100UL, 0x42080100UL, 0x42080100UL, 0x02000100UL,
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0x42080000UL, 0x40000100UL, 0x00000000UL, 0x42000000UL,
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0x02080100UL, 0x02000000UL, 0x42000000UL, 0x00080100UL,
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0x00080000UL, 0x42000100UL, 0x00000100UL, 0x02000000UL,
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0x40000000UL, 0x02080000UL, 0x42000100UL, 0x40080100UL,
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0x02000100UL, 0x40000000UL, 0x42080000UL, 0x02080100UL,
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0x40080100UL, 0x00000100UL, 0x02000000UL, 0x42080000UL,
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0x42080100UL, 0x00080100UL, 0x42000000UL, 0x42080100UL,
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0x02080000UL, 0x00000000UL, 0x40080000UL, 0x42000000UL,
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0x00080100UL, 0x02000100UL, 0x40000100UL, 0x00080000UL,
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0x00000000UL, 0x40080000UL, 0x02080100UL, 0x40000100UL
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};
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static const u32 SP6[64] =
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{
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0x20000010UL, 0x20400000UL, 0x00004000UL, 0x20404010UL,
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0x20400000UL, 0x00000010UL, 0x20404010UL, 0x00400000UL,
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0x20004000UL, 0x00404010UL, 0x00400000UL, 0x20000010UL,
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0x00400010UL, 0x20004000UL, 0x20000000UL, 0x00004010UL,
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0x00000000UL, 0x00400010UL, 0x20004010UL, 0x00004000UL,
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0x00404000UL, 0x20004010UL, 0x00000010UL, 0x20400010UL,
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0x20400010UL, 0x00000000UL, 0x00404010UL, 0x20404000UL,
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0x00004010UL, 0x00404000UL, 0x20404000UL, 0x20000000UL,
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0x20004000UL, 0x00000010UL, 0x20400010UL, 0x00404000UL,
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0x20404010UL, 0x00400000UL, 0x00004010UL, 0x20000010UL,
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0x00400000UL, 0x20004000UL, 0x20000000UL, 0x00004010UL,
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0x20000010UL, 0x20404010UL, 0x00404000UL, 0x20400000UL,
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0x00404010UL, 0x20404000UL, 0x00000000UL, 0x20400010UL,
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0x00000010UL, 0x00004000UL, 0x20400000UL, 0x00404010UL,
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0x00004000UL, 0x00400010UL, 0x20004010UL, 0x00000000UL,
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0x20404000UL, 0x20000000UL, 0x00400010UL, 0x20004010UL
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};
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static const u32 SP7[64] =
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{
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0x00200000UL, 0x04200002UL, 0x04000802UL, 0x00000000UL,
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0x00000800UL, 0x04000802UL, 0x00200802UL, 0x04200800UL,
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0x04200802UL, 0x00200000UL, 0x00000000UL, 0x04000002UL,
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0x00000002UL, 0x04000000UL, 0x04200002UL, 0x00000802UL,
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0x04000800UL, 0x00200802UL, 0x00200002UL, 0x04000800UL,
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0x04000002UL, 0x04200000UL, 0x04200800UL, 0x00200002UL,
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0x04200000UL, 0x00000800UL, 0x00000802UL, 0x04200802UL,
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0x00200800UL, 0x00000002UL, 0x04000000UL, 0x00200800UL,
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0x04000000UL, 0x00200800UL, 0x00200000UL, 0x04000802UL,
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0x04000802UL, 0x04200002UL, 0x04200002UL, 0x00000002UL,
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0x00200002UL, 0x04000000UL, 0x04000800UL, 0x00200000UL,
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0x04200800UL, 0x00000802UL, 0x00200802UL, 0x04200800UL,
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0x00000802UL, 0x04000002UL, 0x04200802UL, 0x04200000UL,
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0x00200800UL, 0x00000000UL, 0x00000002UL, 0x04200802UL,
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0x00000000UL, 0x00200802UL, 0x04200000UL, 0x00000800UL,
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0x04000002UL, 0x04000800UL, 0x00000800UL, 0x00200002UL
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};
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static const u32 SP8[64] =
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{
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0x10001040UL, 0x00001000UL, 0x00040000UL, 0x10041040UL,
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0x10000000UL, 0x10001040UL, 0x00000040UL, 0x10000000UL,
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0x00040040UL, 0x10040000UL, 0x10041040UL, 0x00041000UL,
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0x10041000UL, 0x00041040UL, 0x00001000UL, 0x00000040UL,
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0x10040000UL, 0x10000040UL, 0x10001000UL, 0x00001040UL,
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0x00041000UL, 0x00040040UL, 0x10040040UL, 0x10041000UL,
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0x00001040UL, 0x00000000UL, 0x00000000UL, 0x10040040UL,
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0x10000040UL, 0x10001000UL, 0x00041040UL, 0x00040000UL,
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0x00041040UL, 0x00040000UL, 0x10041000UL, 0x00001000UL,
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0x00000040UL, 0x10040040UL, 0x00001000UL, 0x00041040UL,
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0x10001000UL, 0x00000040UL, 0x10000040UL, 0x10040000UL,
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0x10040040UL, 0x10000000UL, 0x00040000UL, 0x10001040UL,
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0x00000000UL, 0x10041040UL, 0x00040040UL, 0x10000040UL,
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0x10040000UL, 0x10001000UL, 0x10001040UL, 0x00000000UL,
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0x10041040UL, 0x00041000UL, 0x00041000UL, 0x00001040UL,
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0x00001040UL, 0x00040040UL, 0x10000000UL, 0x10041000UL
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};
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static void cookey(const u32 *raw1, u32 *keyout)
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{
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u32 *cook;
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const u32 *raw0;
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u32 dough[32];
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int i;
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cook = dough;
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for (i = 0; i < 16; i++, raw1++) {
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raw0 = raw1++;
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*cook = (*raw0 & 0x00fc0000L) << 6;
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*cook |= (*raw0 & 0x00000fc0L) << 10;
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*cook |= (*raw1 & 0x00fc0000L) >> 10;
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*cook++ |= (*raw1 & 0x00000fc0L) >> 6;
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*cook = (*raw0 & 0x0003f000L) << 12;
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*cook |= (*raw0 & 0x0000003fL) << 16;
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*cook |= (*raw1 & 0x0003f000L) >> 4;
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*cook++ |= (*raw1 & 0x0000003fL);
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}
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os_memcpy(keyout, dough, sizeof(dough));
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}
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static void deskey(const u8 *key, int decrypt, u32 *keyout)
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{
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u32 i, j, l, m, n, kn[32];
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u8 pc1m[56], pcr[56];
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for (j = 0; j < 56; j++) {
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l = (u32) pc1[j];
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m = l & 7;
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pc1m[j] = (u8)
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((key[l >> 3U] & bytebit[m]) == bytebit[m] ? 1 : 0);
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}
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for (i = 0; i < 16; i++) {
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if (decrypt)
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m = (15 - i) << 1;
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else
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m = i << 1;
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n = m + 1;
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kn[m] = kn[n] = 0L;
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for (j = 0; j < 28; j++) {
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l = j + (u32) totrot[i];
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if (l < 28)
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pcr[j] = pc1m[l];
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else
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pcr[j] = pc1m[l - 28];
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}
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for (/* j = 28 */; j < 56; j++) {
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l = j + (u32) totrot[i];
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if (l < 56)
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pcr[j] = pc1m[l];
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else
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pcr[j] = pc1m[l - 28];
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}
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for (j = 0; j < 24; j++) {
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if ((int) pcr[(int) pc2[j]] != 0)
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kn[m] |= bigbyte[j];
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if ((int) pcr[(int) pc2[j + 24]] != 0)
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kn[n] |= bigbyte[j];
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}
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}
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cookey(kn, keyout);
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}
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static void desfunc(u32 *block, const u32 *keys)
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{
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u32 work, right, leftt;
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int cur_round;
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leftt = block[0];
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right = block[1];
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work = ((leftt >> 4) ^ right) & 0x0f0f0f0fL;
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right ^= work;
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leftt ^= (work << 4);
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work = ((leftt >> 16) ^ right) & 0x0000ffffL;
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right ^= work;
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leftt ^= (work << 16);
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work = ((right >> 2) ^ leftt) & 0x33333333L;
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leftt ^= work;
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right ^= (work << 2);
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work = ((right >> 8) ^ leftt) & 0x00ff00ffL;
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leftt ^= work;
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right ^= (work << 8);
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right = ROLc(right, 1);
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work = (leftt ^ right) & 0xaaaaaaaaL;
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leftt ^= work;
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right ^= work;
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leftt = ROLc(leftt, 1);
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for (cur_round = 0; cur_round < 8; cur_round++) {
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work = RORc(right, 4) ^ *keys++;
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leftt ^= SP7[work & 0x3fL]
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^ SP5[(work >> 8) & 0x3fL]
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^ SP3[(work >> 16) & 0x3fL]
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^ SP1[(work >> 24) & 0x3fL];
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work = right ^ *keys++;
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leftt ^= SP8[ work & 0x3fL]
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^ SP6[(work >> 8) & 0x3fL]
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^ SP4[(work >> 16) & 0x3fL]
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^ SP2[(work >> 24) & 0x3fL];
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work = RORc(leftt, 4) ^ *keys++;
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right ^= SP7[ work & 0x3fL]
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^ SP5[(work >> 8) & 0x3fL]
|
|
^ SP3[(work >> 16) & 0x3fL]
|
|
^ SP1[(work >> 24) & 0x3fL];
|
|
work = leftt ^ *keys++;
|
|
right ^= SP8[ work & 0x3fL]
|
|
^ SP6[(work >> 8) & 0x3fL]
|
|
^ SP4[(work >> 16) & 0x3fL]
|
|
^ SP2[(work >> 24) & 0x3fL];
|
|
}
|
|
|
|
right = RORc(right, 1);
|
|
work = (leftt ^ right) & 0xaaaaaaaaL;
|
|
leftt ^= work;
|
|
right ^= work;
|
|
leftt = RORc(leftt, 1);
|
|
work = ((leftt >> 8) ^ right) & 0x00ff00ffL;
|
|
right ^= work;
|
|
leftt ^= (work << 8);
|
|
/* -- */
|
|
work = ((leftt >> 2) ^ right) & 0x33333333L;
|
|
right ^= work;
|
|
leftt ^= (work << 2);
|
|
work = ((right >> 16) ^ leftt) & 0x0000ffffL;
|
|
leftt ^= work;
|
|
right ^= (work << 16);
|
|
work = ((right >> 4) ^ leftt) & 0x0f0f0f0fL;
|
|
leftt ^= work;
|
|
right ^= (work << 4);
|
|
|
|
block[0] = right;
|
|
block[1] = leftt;
|
|
}
|
|
|
|
|
|
/* wpa_supplicant/hostapd specific wrapper */
|
|
|
|
void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
|
|
{
|
|
u8 pkey[8], next, tmp;
|
|
int i;
|
|
u32 ek[32], work[2];
|
|
|
|
/* Add parity bits to the key */
|
|
next = 0;
|
|
for (i = 0; i < 7; i++) {
|
|
tmp = key[i];
|
|
pkey[i] = (tmp >> i) | next | 1;
|
|
next = tmp << (7 - i);
|
|
}
|
|
pkey[i] = next | 1;
|
|
|
|
deskey(pkey, 0, ek);
|
|
|
|
work[0] = WPA_GET_BE32(clear);
|
|
work[1] = WPA_GET_BE32(clear + 4);
|
|
desfunc(work, ek);
|
|
WPA_PUT_BE32(cypher, work[0]);
|
|
WPA_PUT_BE32(cypher + 4, work[1]);
|
|
}
|
|
|
|
|
|
struct des3_key_s {
|
|
u32 ek[3][32];
|
|
u32 dk[3][32];
|
|
};
|
|
|
|
void des3_key_setup(const u8 *key, struct des3_key_s *dkey)
|
|
{
|
|
deskey(key, 0, dkey->ek[0]);
|
|
deskey(key + 8, 1, dkey->ek[1]);
|
|
deskey(key + 16, 0, dkey->ek[2]);
|
|
|
|
deskey(key, 1, dkey->dk[2]);
|
|
deskey(key + 8, 0, dkey->dk[1]);
|
|
deskey(key + 16, 1, dkey->dk[0]);
|
|
}
|
|
|
|
|
|
void des3_encrypt(const u8 *plain, const struct des3_key_s *key, u8 *crypt)
|
|
{
|
|
u32 work[2];
|
|
|
|
work[0] = WPA_GET_BE32(plain);
|
|
work[1] = WPA_GET_BE32(plain + 4);
|
|
desfunc(work, key->ek[0]);
|
|
desfunc(work, key->ek[1]);
|
|
desfunc(work, key->ek[2]);
|
|
WPA_PUT_BE32(crypt, work[0]);
|
|
WPA_PUT_BE32(crypt + 4, work[1]);
|
|
}
|
|
|
|
|
|
void des3_decrypt(const u8 *crypt, const struct des3_key_s *key, u8 *plain)
|
|
{
|
|
u32 work[2];
|
|
|
|
work[0] = WPA_GET_BE32(crypt);
|
|
work[1] = WPA_GET_BE32(crypt + 4);
|
|
desfunc(work, key->dk[0]);
|
|
desfunc(work, key->dk[1]);
|
|
desfunc(work, key->dk[2]);
|
|
WPA_PUT_BE32(plain, work[0]);
|
|
WPA_PUT_BE32(plain + 4, work[1]);
|
|
}
|
|
|
|
#endif /* INTERNAL_DES */
|