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1186 lines
33 KiB
C
1186 lines
33 KiB
C
/*
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* Copyright (c) 2005 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/**
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* @page page_des DES - Data Encryption Standard crypto interface
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*
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* See the library functions here: @ref hcrypto_des
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*
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* DES was created by IBM, modififed by NSA and then adopted by NBS
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* (now NIST) and published ad FIPS PUB 46 (updated by FIPS 46-1).
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*
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* Since the 19th May 2005 DES was withdrawn by NIST and should no
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* longer be used. See @ref page_evp for replacement encryption
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* algorithms and interfaces.
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*
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* Read more the iteresting history of DES on Wikipedia
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* http://www.wikipedia.org/wiki/Data_Encryption_Standard .
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*
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* @section des_keygen DES key generation
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*
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* To generate a DES key safely you have to use the code-snippet
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* below. This is because the DES_random_key() can fail with an
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* abort() in case of and failure to start the random generator.
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*
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* There is a replacement function DES_new_random_key(), however that
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* function does not exists in OpenSSL.
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*
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* @code
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* DES_cblock key;
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* do {
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* if (RAND_rand(&key, sizeof(key)) != 1)
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* goto failure;
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* DES_set_odd_parity(key);
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* } while (DES_is_weak_key(&key));
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* @endcode
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*
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* @section des_impl DES implementation history
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*
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* There was no complete BSD licensed, fast, GPL compatible
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* implementation of DES, so Love wrote the part that was missing,
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* fast key schedule setup and adapted the interface to the orignal
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* libdes.
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*
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* The document that got me started for real was "Efficient
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* Implementation of the Data Encryption Standard" by Dag Arne Osvik.
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* I never got to the PC1 transformation was working, instead I used
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* table-lookup was used for all key schedule setup. The document was
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* very useful since it de-mystified other implementations for me.
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*
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* The core DES function (SBOX + P transformation) is from Richard
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* Outerbridge public domain DES implementation. My sanity is saved
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* thanks to his work. Thank you Richard.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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RCSID("$Id$");
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#endif
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#define HC_DEPRECATED
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <krb5-types.h>
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#include <assert.h>
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#include "des.h"
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#include "ui.h"
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static void desx(uint32_t [2], DES_key_schedule *, int);
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static void IP(uint32_t [2]);
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static void FP(uint32_t [2]);
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#include "des-tables.h"
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#define ROTATE_LEFT28(x,one) \
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if (one) { \
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x = ( ((x)<<(1)) & 0xffffffe) | ((x) >> 27); \
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} else { \
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x = ( ((x)<<(2)) & 0xffffffc) | ((x) >> 26); \
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}
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/**
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* Set the parity of the key block, used to generate a des key from a
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* random key. See @ref des_keygen.
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*
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* @param key key to fixup the parity for.
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* @ingroup hcrypto_des
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*/
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void
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DES_set_odd_parity(DES_cblock *key)
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{
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unsigned int i;
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for (i = 0; i < DES_CBLOCK_LEN; i++)
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(*key)[i] = odd_parity[(*key)[i]];
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}
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/**
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* Check if the key have correct parity.
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*
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* @param key key to check the parity.
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* @return 1 on success, 0 on failure.
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* @ingroup hcrypto_des
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*/
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int HC_DEPRECATED
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DES_check_key_parity(DES_cblock *key)
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{
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unsigned int i;
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for (i = 0; i < DES_CBLOCK_LEN; i++)
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if ((*key)[i] != odd_parity[(*key)[i]])
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return 0;
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return 1;
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}
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/*
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*
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*/
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/* FIPS 74 */
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static DES_cblock weak_keys[] = {
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{0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01}, /* weak keys */
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{0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE,0xFE},
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{0x1F,0x1F,0x1F,0x1F,0x0E,0x0E,0x0E,0x0E},
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{0xE0,0xE0,0xE0,0xE0,0xF1,0xF1,0xF1,0xF1},
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{0x01,0xFE,0x01,0xFE,0x01,0xFE,0x01,0xFE}, /* semi-weak keys */
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{0xFE,0x01,0xFE,0x01,0xFE,0x01,0xFE,0x01},
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{0x1F,0xE0,0x1F,0xE0,0x0E,0xF1,0x0E,0xF1},
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{0xE0,0x1F,0xE0,0x1F,0xF1,0x0E,0xF1,0x0E},
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{0x01,0xE0,0x01,0xE0,0x01,0xF1,0x01,0xF1},
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{0xE0,0x01,0xE0,0x01,0xF1,0x01,0xF1,0x01},
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{0x1F,0xFE,0x1F,0xFE,0x0E,0xFE,0x0E,0xFE},
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{0xFE,0x1F,0xFE,0x1F,0xFE,0x0E,0xFE,0x0E},
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{0x01,0x1F,0x01,0x1F,0x01,0x0E,0x01,0x0E},
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{0x1F,0x01,0x1F,0x01,0x0E,0x01,0x0E,0x01},
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{0xE0,0xFE,0xE0,0xFE,0xF1,0xFE,0xF1,0xFE},
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{0xFE,0xE0,0xFE,0xE0,0xFE,0xF1,0xFE,0xF1}
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};
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/**
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* Checks if the key is any of the weaks keys that makes DES attacks
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* trival.
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*
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* @param key key to check.
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*
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* @return 1 if the key is weak, 0 otherwise.
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* @ingroup hcrypto_des
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*/
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int
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DES_is_weak_key(DES_cblock *key)
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{
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int i;
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for (i = 0; i < sizeof(weak_keys)/sizeof(weak_keys[0]); i++) {
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if (memcmp(weak_keys[i], key, DES_CBLOCK_LEN) == 0)
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return 1;
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}
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return 0;
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}
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/**
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* Setup a des key schedule from a key. Deprecated function, use
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* DES_set_key_unchecked() or DES_set_key_checked() instead.
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*
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* @param key a key to initialize the key schedule with.
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* @param ks a key schedule to initialize.
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*
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* @return 0 on success
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* @ingroup hcrypto_des
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*/
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int HC_DEPRECATED
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DES_set_key(DES_cblock *key, DES_key_schedule *ks)
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{
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return DES_set_key_checked(key, ks);
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}
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/**
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* Setup a des key schedule from a key. The key is no longer needed
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* after this transaction and can cleared.
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*
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* Does NOT check that the key is weak for or have wrong parity.
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*
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* @param key a key to initialize the key schedule with.
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* @param ks a key schedule to initialize.
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*
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* @return 0 on success
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* @ingroup hcrypto_des
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*/
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int
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DES_set_key_unchecked(DES_cblock *key, DES_key_schedule *ks)
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{
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uint32_t t1, t2;
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uint32_t c, d;
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int shifts[16] = { 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1 };
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uint32_t *k = &ks->ks[0];
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int i;
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t1 = (*key)[0] << 24 | (*key)[1] << 16 | (*key)[2] << 8 | (*key)[3];
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t2 = (*key)[4] << 24 | (*key)[5] << 16 | (*key)[6] << 8 | (*key)[7];
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c = (pc1_c_3[(t1 >> (5 )) & 0x7] << 3)
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| (pc1_c_3[(t1 >> (5 + 8 )) & 0x7] << 2)
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| (pc1_c_3[(t1 >> (5 + 8 + 8 )) & 0x7] << 1)
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| (pc1_c_3[(t1 >> (5 + 8 + 8 + 8)) & 0x7] << 0)
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| (pc1_c_4[(t2 >> (4 )) & 0xf] << 3)
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| (pc1_c_4[(t2 >> (4 + 8 )) & 0xf] << 2)
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| (pc1_c_4[(t2 >> (4 + 8 + 8 )) & 0xf] << 1)
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| (pc1_c_4[(t2 >> (4 + 8 + 8 + 8)) & 0xf] << 0);
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d = (pc1_d_3[(t2 >> (1 )) & 0x7] << 3)
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| (pc1_d_3[(t2 >> (1 + 8 )) & 0x7] << 2)
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| (pc1_d_3[(t2 >> (1 + 8 + 8 )) & 0x7] << 1)
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| (pc1_d_3[(t2 >> (1 + 8 + 8 + 8)) & 0x7] << 0)
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| (pc1_d_4[(t1 >> (1 )) & 0xf] << 3)
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| (pc1_d_4[(t1 >> (1 + 8 )) & 0xf] << 2)
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| (pc1_d_4[(t1 >> (1 + 8 + 8 )) & 0xf] << 1)
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| (pc1_d_4[(t1 >> (1 + 8 + 8 + 8)) & 0xf] << 0);
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for (i = 0; i < 16; i++) {
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uint32_t kc, kd;
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ROTATE_LEFT28(c, shifts[i]);
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ROTATE_LEFT28(d, shifts[i]);
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kc = pc2_c_1[(c >> 22) & 0x3f] |
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pc2_c_2[((c >> 16) & 0x30) | ((c >> 15) & 0xf)] |
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pc2_c_3[((c >> 9 ) & 0x3c) | ((c >> 8 ) & 0x3)] |
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pc2_c_4[((c >> 2 ) & 0x20) | ((c >> 1) & 0x18) | (c & 0x7)];
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kd = pc2_d_1[(d >> 22) & 0x3f] |
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pc2_d_2[((d >> 15) & 0x30) | ((d >> 14) & 0xf)] |
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pc2_d_3[ (d >> 7 ) & 0x3f] |
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pc2_d_4[((d >> 1 ) & 0x3c) | ((d ) & 0x3)];
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/* Change to byte order used by the S boxes */
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*k = (kc & 0x00fc0000L) << 6;
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*k |= (kc & 0x00000fc0L) << 10;
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*k |= (kd & 0x00fc0000L) >> 10;
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*k++ |= (kd & 0x00000fc0L) >> 6;
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*k = (kc & 0x0003f000L) << 12;
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*k |= (kc & 0x0000003fL) << 16;
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*k |= (kd & 0x0003f000L) >> 4;
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*k++ |= (kd & 0x0000003fL);
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}
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return 0;
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}
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/**
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* Just like DES_set_key_unchecked() except checking that the key is
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* not weak for or have correct parity.
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*
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* @param key a key to initialize the key schedule with.
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* @param ks a key schedule to initialize.
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*
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* @return 0 on success, -1 on invalid parity, -2 on weak key.
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* @ingroup hcrypto_des
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*/
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int
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DES_set_key_checked(DES_cblock *key, DES_key_schedule *ks)
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{
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if (!DES_check_key_parity(key)) {
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memset(ks, 0, sizeof(*ks));
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return -1;
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}
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if (DES_is_weak_key(key)) {
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memset(ks, 0, sizeof(*ks));
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return -2;
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}
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return DES_set_key_unchecked(key, ks);
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}
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/**
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* Compatibility function for eay libdes, works just like
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* DES_set_key_checked().
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*
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* @param key a key to initialize the key schedule with.
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* @param ks a key schedule to initialize.
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*
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* @return 0 on success, -1 on invalid parity, -2 on weak key.
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* @ingroup hcrypto_des
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*/
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int
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DES_key_sched(DES_cblock *key, DES_key_schedule *ks)
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{
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return DES_set_key_checked(key, ks);
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}
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/*
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*
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*/
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static void
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load(const unsigned char *b, uint32_t v[2])
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{
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v[0] = b[0] << 24;
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v[0] |= b[1] << 16;
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v[0] |= b[2] << 8;
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v[0] |= b[3] << 0;
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v[1] = b[4] << 24;
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v[1] |= b[5] << 16;
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v[1] |= b[6] << 8;
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v[1] |= b[7] << 0;
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}
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static void
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store(const uint32_t v[2], unsigned char *b)
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{
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b[0] = (v[0] >> 24) & 0xff;
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b[1] = (v[0] >> 16) & 0xff;
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b[2] = (v[0] >> 8) & 0xff;
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b[3] = (v[0] >> 0) & 0xff;
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b[4] = (v[1] >> 24) & 0xff;
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b[5] = (v[1] >> 16) & 0xff;
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b[6] = (v[1] >> 8) & 0xff;
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b[7] = (v[1] >> 0) & 0xff;
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}
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/**
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* Encrypt/decrypt a block using DES. Also called ECB mode
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*
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* @param u data to encrypt
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* @param ks key schedule to use
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* @param encp if non zero, encrypt. if zero, decrypt.
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*
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* @ingroup hcrypto_des
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*/
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void
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DES_encrypt(uint32_t u[2], DES_key_schedule *ks, int encp)
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{
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IP(u);
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desx(u, ks, encp);
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FP(u);
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}
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/**
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* Encrypt/decrypt a block using DES.
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*
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* @param input data to encrypt
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* @param output data to encrypt
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* @param ks key schedule to use
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* @param encp if non zero, encrypt. if zero, decrypt.
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*
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* @ingroup hcrypto_des
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*/
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void
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DES_ecb_encrypt(DES_cblock *input, DES_cblock *output,
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DES_key_schedule *ks, int encp)
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{
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uint32_t u[2];
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load(*input, u);
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DES_encrypt(u, ks, encp);
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store(u, *output);
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}
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/**
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* Encrypt/decrypt a block using DES in Chain Block Cipher mode (cbc).
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*
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* The IV must always be diffrent for diffrent input data blocks.
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*
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* @param in data to encrypt
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* @param out data to encrypt
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* @param length length of data
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* @param ks key schedule to use
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* @param iv initial vector to use
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* @param encp if non zero, encrypt. if zero, decrypt.
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*
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* @ingroup hcrypto_des
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*/
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void
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DES_cbc_encrypt(const void *in, void *out, long length,
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DES_key_schedule *ks, DES_cblock *iv, int encp)
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{
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const unsigned char *input = in;
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unsigned char *output = out;
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uint32_t u[2];
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uint32_t uiv[2];
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load(*iv, uiv);
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if (encp) {
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while (length >= DES_CBLOCK_LEN) {
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load(input, u);
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u[0] ^= uiv[0]; u[1] ^= uiv[1];
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DES_encrypt(u, ks, 1);
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uiv[0] = u[0]; uiv[1] = u[1];
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store(u, output);
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length -= DES_CBLOCK_LEN;
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input += DES_CBLOCK_LEN;
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output += DES_CBLOCK_LEN;
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}
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if (length) {
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unsigned char tmp[DES_CBLOCK_LEN];
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memcpy(tmp, input, length);
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memset(tmp + length, 0, DES_CBLOCK_LEN - length);
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load(tmp, u);
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u[0] ^= uiv[0]; u[1] ^= uiv[1];
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DES_encrypt(u, ks, 1);
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store(u, output);
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}
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} else {
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uint32_t t[2];
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while (length >= DES_CBLOCK_LEN) {
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load(input, u);
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t[0] = u[0]; t[1] = u[1];
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DES_encrypt(u, ks, 0);
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u[0] ^= uiv[0]; u[1] ^= uiv[1];
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store(u, output);
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uiv[0] = t[0]; uiv[1] = t[1];
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length -= DES_CBLOCK_LEN;
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input += DES_CBLOCK_LEN;
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output += DES_CBLOCK_LEN;
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}
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if (length) {
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unsigned char tmp[DES_CBLOCK_LEN];
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memcpy(tmp, input, length);
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memset(tmp + length, 0, DES_CBLOCK_LEN - length);
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load(tmp, u);
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DES_encrypt(u, ks, 0);
|
|
u[0] ^= uiv[0]; u[1] ^= uiv[1];
|
|
store(u, output);
|
|
}
|
|
}
|
|
uiv[0] = 0; u[0] = 0; uiv[1] = 0; u[1] = 0;
|
|
}
|
|
|
|
/**
|
|
* Encrypt/decrypt a block using DES in Propagating Cipher Block
|
|
* Chaining mode. This mode is only used for Kerberos 4, and it should
|
|
* stay that way.
|
|
*
|
|
* The IV must always be diffrent for diffrent input data blocks.
|
|
*
|
|
* @param in data to encrypt
|
|
* @param out data to encrypt
|
|
* @param length length of data
|
|
* @param ks key schedule to use
|
|
* @param iv initial vector to use
|
|
* @param encp if non zero, encrypt. if zero, decrypt.
|
|
*
|
|
* @ingroup hcrypto_des
|
|
*/
|
|
|
|
void
|
|
DES_pcbc_encrypt(const void *in, void *out, long length,
|
|
DES_key_schedule *ks, DES_cblock *iv, int encp)
|
|
{
|
|
const unsigned char *input = in;
|
|
unsigned char *output = out;
|
|
uint32_t u[2];
|
|
uint32_t uiv[2];
|
|
|
|
load(*iv, uiv);
|
|
|
|
if (encp) {
|
|
uint32_t t[2];
|
|
while (length >= DES_CBLOCK_LEN) {
|
|
load(input, u);
|
|
t[0] = u[0]; t[1] = u[1];
|
|
u[0] ^= uiv[0]; u[1] ^= uiv[1];
|
|
DES_encrypt(u, ks, 1);
|
|
uiv[0] = u[0] ^ t[0]; uiv[1] = u[1] ^ t[1];
|
|
store(u, output);
|
|
|
|
length -= DES_CBLOCK_LEN;
|
|
input += DES_CBLOCK_LEN;
|
|
output += DES_CBLOCK_LEN;
|
|
}
|
|
if (length) {
|
|
unsigned char tmp[DES_CBLOCK_LEN];
|
|
memcpy(tmp, input, length);
|
|
memset(tmp + length, 0, DES_CBLOCK_LEN - length);
|
|
load(tmp, u);
|
|
u[0] ^= uiv[0]; u[1] ^= uiv[1];
|
|
DES_encrypt(u, ks, 1);
|
|
store(u, output);
|
|
}
|
|
} else {
|
|
uint32_t t[2];
|
|
while (length >= DES_CBLOCK_LEN) {
|
|
load(input, u);
|
|
t[0] = u[0]; t[1] = u[1];
|
|
DES_encrypt(u, ks, 0);
|
|
u[0] ^= uiv[0]; u[1] ^= uiv[1];
|
|
store(u, output);
|
|
uiv[0] = t[0] ^ u[0]; uiv[1] = t[1] ^ u[1];
|
|
|
|
length -= DES_CBLOCK_LEN;
|
|
input += DES_CBLOCK_LEN;
|
|
output += DES_CBLOCK_LEN;
|
|
}
|
|
if (length) {
|
|
unsigned char tmp[DES_CBLOCK_LEN];
|
|
memcpy(tmp, input, length);
|
|
memset(tmp + length, 0, DES_CBLOCK_LEN - length);
|
|
load(tmp, u);
|
|
DES_encrypt(u, ks, 0);
|
|
u[0] ^= uiv[0]; u[1] ^= uiv[1];
|
|
}
|
|
}
|
|
uiv[0] = 0; u[0] = 0; uiv[1] = 0; u[1] = 0;
|
|
}
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
static void
|
|
_des3_encrypt(uint32_t u[2], DES_key_schedule *ks1, DES_key_schedule *ks2,
|
|
DES_key_schedule *ks3, int encp)
|
|
{
|
|
IP(u);
|
|
if (encp) {
|
|
desx(u, ks1, 1); /* IP + FP cancel out each other */
|
|
desx(u, ks2, 0);
|
|
desx(u, ks3, 1);
|
|
} else {
|
|
desx(u, ks3, 0);
|
|
desx(u, ks2, 1);
|
|
desx(u, ks1, 0);
|
|
}
|
|
FP(u);
|
|
}
|
|
|
|
/**
|
|
* Encrypt/decrypt a block using triple DES using EDE mode,
|
|
* encrypt/decrypt/encrypt.
|
|
*
|
|
* @param input data to encrypt
|
|
* @param output data to encrypt
|
|
* @param ks1 key schedule to use
|
|
* @param ks2 key schedule to use
|
|
* @param ks3 key schedule to use
|
|
* @param encp if non zero, encrypt. if zero, decrypt.
|
|
*
|
|
* @ingroup hcrypto_des
|
|
*/
|
|
|
|
void
|
|
DES_ecb3_encrypt(DES_cblock *input,
|
|
DES_cblock *output,
|
|
DES_key_schedule *ks1,
|
|
DES_key_schedule *ks2,
|
|
DES_key_schedule *ks3,
|
|
int encp)
|
|
{
|
|
uint32_t u[2];
|
|
load(*input, u);
|
|
_des3_encrypt(u, ks1, ks2, ks3, encp);
|
|
store(u, *output);
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* Encrypt/decrypt using Triple DES in Chain Block Cipher mode (cbc).
|
|
*
|
|
* The IV must always be diffrent for diffrent input data blocks.
|
|
*
|
|
* @param in data to encrypt
|
|
* @param out data to encrypt
|
|
* @param length length of data
|
|
* @param ks1 key schedule to use
|
|
* @param ks2 key schedule to use
|
|
* @param ks3 key schedule to use
|
|
* @param iv initial vector to use
|
|
* @param encp if non zero, encrypt. if zero, decrypt.
|
|
*
|
|
* @ingroup hcrypto_des
|
|
*/
|
|
|
|
void
|
|
DES_ede3_cbc_encrypt(const void *in, void *out,
|
|
long length, DES_key_schedule *ks1,
|
|
DES_key_schedule *ks2, DES_key_schedule *ks3,
|
|
DES_cblock *iv, int encp)
|
|
{
|
|
const unsigned char *input = in;
|
|
unsigned char *output = out;
|
|
uint32_t u[2];
|
|
uint32_t uiv[2];
|
|
|
|
load(*iv, uiv);
|
|
|
|
if (encp) {
|
|
while (length >= DES_CBLOCK_LEN) {
|
|
load(input, u);
|
|
u[0] ^= uiv[0]; u[1] ^= uiv[1];
|
|
_des3_encrypt(u, ks1, ks2, ks3, 1);
|
|
uiv[0] = u[0]; uiv[1] = u[1];
|
|
store(u, output);
|
|
|
|
length -= DES_CBLOCK_LEN;
|
|
input += DES_CBLOCK_LEN;
|
|
output += DES_CBLOCK_LEN;
|
|
}
|
|
if (length) {
|
|
unsigned char tmp[DES_CBLOCK_LEN];
|
|
memcpy(tmp, input, length);
|
|
memset(tmp + length, 0, DES_CBLOCK_LEN - length);
|
|
load(tmp, u);
|
|
u[0] ^= uiv[0]; u[1] ^= uiv[1];
|
|
_des3_encrypt(u, ks1, ks2, ks3, 1);
|
|
store(u, output);
|
|
}
|
|
} else {
|
|
uint32_t t[2];
|
|
while (length >= DES_CBLOCK_LEN) {
|
|
load(input, u);
|
|
t[0] = u[0]; t[1] = u[1];
|
|
_des3_encrypt(u, ks1, ks2, ks3, 0);
|
|
u[0] ^= uiv[0]; u[1] ^= uiv[1];
|
|
store(u, output);
|
|
uiv[0] = t[0]; uiv[1] = t[1];
|
|
|
|
length -= DES_CBLOCK_LEN;
|
|
input += DES_CBLOCK_LEN;
|
|
output += DES_CBLOCK_LEN;
|
|
}
|
|
if (length) {
|
|
unsigned char tmp[DES_CBLOCK_LEN];
|
|
memcpy(tmp, input, length);
|
|
memset(tmp + length, 0, DES_CBLOCK_LEN - length);
|
|
load(tmp, u);
|
|
_des3_encrypt(u, ks1, ks2, ks3, 0);
|
|
u[0] ^= uiv[0]; u[1] ^= uiv[1];
|
|
store(u, output);
|
|
}
|
|
}
|
|
store(uiv, *iv);
|
|
uiv[0] = 0; u[0] = 0; uiv[1] = 0; u[1] = 0;
|
|
}
|
|
|
|
/**
|
|
* Encrypt/decrypt using DES in cipher feedback mode with 64 bit
|
|
* feedback.
|
|
*
|
|
* The IV must always be diffrent for diffrent input data blocks.
|
|
*
|
|
* @param in data to encrypt
|
|
* @param out data to encrypt
|
|
* @param length length of data
|
|
* @param ks key schedule to use
|
|
* @param iv initial vector to use
|
|
* @param num offset into in cipher block encryption/decryption stop last time.
|
|
* @param encp if non zero, encrypt. if zero, decrypt.
|
|
*
|
|
* @ingroup hcrypto_des
|
|
*/
|
|
|
|
void
|
|
DES_cfb64_encrypt(const void *in, void *out,
|
|
long length, DES_key_schedule *ks, DES_cblock *iv,
|
|
int *num, int encp)
|
|
{
|
|
const unsigned char *input = in;
|
|
unsigned char *output = out;
|
|
unsigned char tmp[DES_CBLOCK_LEN];
|
|
uint32_t uiv[2];
|
|
|
|
load(*iv, uiv);
|
|
|
|
assert(*num >= 0 && *num < DES_CBLOCK_LEN);
|
|
|
|
if (encp) {
|
|
int i = *num;
|
|
|
|
while (length > 0) {
|
|
if (i == 0)
|
|
DES_encrypt(uiv, ks, 1);
|
|
store(uiv, tmp);
|
|
for (; i < DES_CBLOCK_LEN && i < length; i++) {
|
|
output[i] = tmp[i] ^ input[i];
|
|
}
|
|
if (i == DES_CBLOCK_LEN)
|
|
load(output, uiv);
|
|
output += i;
|
|
input += i;
|
|
length -= i;
|
|
if (i == DES_CBLOCK_LEN)
|
|
i = 0;
|
|
}
|
|
store(uiv, *iv);
|
|
*num = i;
|
|
} else {
|
|
int i = *num;
|
|
unsigned char c;
|
|
|
|
while (length > 0) {
|
|
if (i == 0) {
|
|
DES_encrypt(uiv, ks, 1);
|
|
store(uiv, tmp);
|
|
}
|
|
for (; i < DES_CBLOCK_LEN && i < length; i++) {
|
|
c = input[i];
|
|
output[i] = tmp[i] ^ input[i];
|
|
(*iv)[i] = c;
|
|
}
|
|
output += i;
|
|
input += i;
|
|
length -= i;
|
|
if (i == DES_CBLOCK_LEN) {
|
|
i = 0;
|
|
load(*iv, uiv);
|
|
}
|
|
}
|
|
store(uiv, *iv);
|
|
*num = i;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Crete a checksum using DES in CBC encryption mode. This mode is
|
|
* only used for Kerberos 4, and it should stay that way.
|
|
*
|
|
* The IV must always be diffrent for diffrent input data blocks.
|
|
*
|
|
* @param in data to checksum
|
|
* @param output the checksum
|
|
* @param length length of data
|
|
* @param ks key schedule to use
|
|
* @param iv initial vector to use
|
|
*
|
|
* @ingroup hcrypto_des
|
|
*/
|
|
|
|
uint32_t
|
|
DES_cbc_cksum(const void *in, DES_cblock *output,
|
|
long length, DES_key_schedule *ks, DES_cblock *iv)
|
|
{
|
|
const unsigned char *input = in;
|
|
uint32_t uiv[2];
|
|
uint32_t u[2] = { 0, 0 };
|
|
|
|
load(*iv, uiv);
|
|
|
|
while (length >= DES_CBLOCK_LEN) {
|
|
load(input, u);
|
|
u[0] ^= uiv[0]; u[1] ^= uiv[1];
|
|
DES_encrypt(u, ks, 1);
|
|
uiv[0] = u[0]; uiv[1] = u[1];
|
|
|
|
length -= DES_CBLOCK_LEN;
|
|
input += DES_CBLOCK_LEN;
|
|
}
|
|
if (length) {
|
|
unsigned char tmp[DES_CBLOCK_LEN];
|
|
memcpy(tmp, input, length);
|
|
memset(tmp + length, 0, DES_CBLOCK_LEN - length);
|
|
load(tmp, u);
|
|
u[0] ^= uiv[0]; u[1] ^= uiv[1];
|
|
DES_encrypt(u, ks, 1);
|
|
}
|
|
if (output)
|
|
store(u, *output);
|
|
|
|
uiv[0] = 0; u[0] = 0; uiv[1] = 0;
|
|
return u[1];
|
|
}
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
static unsigned char
|
|
bitswap8(unsigned char b)
|
|
{
|
|
unsigned char r = 0;
|
|
int i;
|
|
for (i = 0; i < 8; i++) {
|
|
r = r << 1 | (b & 1);
|
|
b = b >> 1;
|
|
}
|
|
return r;
|
|
}
|
|
|
|
/**
|
|
* Convert a string to a DES key. Use something like
|
|
* PKCS5_PBKDF2_HMAC_SHA1() to create key from passwords.
|
|
*
|
|
* @param str The string to convert to a key
|
|
* @param key the resulting key
|
|
*
|
|
* @ingroup hcrypto_des
|
|
*/
|
|
|
|
void
|
|
DES_string_to_key(const char *str, DES_cblock *key)
|
|
{
|
|
const unsigned char *s;
|
|
unsigned char *k;
|
|
DES_key_schedule ks;
|
|
size_t i, len;
|
|
|
|
memset(key, 0, sizeof(*key));
|
|
k = *key;
|
|
s = (const unsigned char *)str;
|
|
|
|
len = strlen(str);
|
|
for (i = 0; i < len; i++) {
|
|
if ((i % 16) < 8)
|
|
k[i % 8] ^= s[i] << 1;
|
|
else
|
|
k[7 - (i % 8)] ^= bitswap8(s[i]);
|
|
}
|
|
DES_set_odd_parity(key);
|
|
if (DES_is_weak_key(key))
|
|
k[7] ^= 0xF0;
|
|
DES_set_key(key, &ks);
|
|
DES_cbc_cksum(s, key, len, &ks, key);
|
|
memset(&ks, 0, sizeof(ks));
|
|
DES_set_odd_parity(key);
|
|
if (DES_is_weak_key(key))
|
|
k[7] ^= 0xF0;
|
|
}
|
|
|
|
/**
|
|
* Read password from prompt and create a DES key. Internal uses
|
|
* DES_string_to_key(). Really, go use a really string2key function
|
|
* like PKCS5_PBKDF2_HMAC_SHA1().
|
|
*
|
|
* @param key key to convert to
|
|
* @param prompt prompt to display user
|
|
* @param verify prompt twice.
|
|
*
|
|
* @return 1 on success, non 1 on failure.
|
|
*/
|
|
|
|
int
|
|
DES_read_password(DES_cblock *key, char *prompt, int verify)
|
|
{
|
|
char buf[512];
|
|
int ret;
|
|
|
|
ret = UI_UTIL_read_pw_string(buf, sizeof(buf) - 1, prompt, verify);
|
|
if (ret == 1)
|
|
DES_string_to_key(buf, key);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
|
|
void
|
|
_DES_ipfp_test(void)
|
|
{
|
|
DES_cblock k = "\x01\x02\x04\x08\x10\x20\x40\x80", k2;
|
|
uint32_t u[2] = { 1, 0 };
|
|
IP(u);
|
|
FP(u);
|
|
IP(u);
|
|
FP(u);
|
|
if (u[0] != 1 || u[1] != 0)
|
|
abort();
|
|
|
|
load(k, u);
|
|
store(u, k2);
|
|
if (memcmp(k, k2, 8) != 0)
|
|
abort();
|
|
}
|
|
|
|
/* D3DES (V5.09) -
|
|
*
|
|
* A portable, public domain, version of the Data Encryption Standard.
|
|
*
|
|
* Written with Symantec's THINK (Lightspeed) C by Richard Outerbridge.
|
|
* Thanks to: Dan Hoey for his excellent Initial and Inverse permutation
|
|
* code; Jim Gillogly & Phil Karn for the DES key schedule code; Dennis
|
|
* Ferguson, Eric Young and Dana How for comparing notes; and Ray Lau,
|
|
* for humouring me on.
|
|
*
|
|
* Copyright (c) 1988,1989,1990,1991,1992 by Richard Outerbridge.
|
|
* (GEnie : OUTER; CIS : [71755,204]) Graven Imagery, 1992.
|
|
*/
|
|
|
|
static uint32_t SP1[64] = {
|
|
0x01010400L, 0x00000000L, 0x00010000L, 0x01010404L,
|
|
0x01010004L, 0x00010404L, 0x00000004L, 0x00010000L,
|
|
0x00000400L, 0x01010400L, 0x01010404L, 0x00000400L,
|
|
0x01000404L, 0x01010004L, 0x01000000L, 0x00000004L,
|
|
0x00000404L, 0x01000400L, 0x01000400L, 0x00010400L,
|
|
0x00010400L, 0x01010000L, 0x01010000L, 0x01000404L,
|
|
0x00010004L, 0x01000004L, 0x01000004L, 0x00010004L,
|
|
0x00000000L, 0x00000404L, 0x00010404L, 0x01000000L,
|
|
0x00010000L, 0x01010404L, 0x00000004L, 0x01010000L,
|
|
0x01010400L, 0x01000000L, 0x01000000L, 0x00000400L,
|
|
0x01010004L, 0x00010000L, 0x00010400L, 0x01000004L,
|
|
0x00000400L, 0x00000004L, 0x01000404L, 0x00010404L,
|
|
0x01010404L, 0x00010004L, 0x01010000L, 0x01000404L,
|
|
0x01000004L, 0x00000404L, 0x00010404L, 0x01010400L,
|
|
0x00000404L, 0x01000400L, 0x01000400L, 0x00000000L,
|
|
0x00010004L, 0x00010400L, 0x00000000L, 0x01010004L };
|
|
|
|
static uint32_t SP2[64] = {
|
|
0x80108020L, 0x80008000L, 0x00008000L, 0x00108020L,
|
|
0x00100000L, 0x00000020L, 0x80100020L, 0x80008020L,
|
|
0x80000020L, 0x80108020L, 0x80108000L, 0x80000000L,
|
|
0x80008000L, 0x00100000L, 0x00000020L, 0x80100020L,
|
|
0x00108000L, 0x00100020L, 0x80008020L, 0x00000000L,
|
|
0x80000000L, 0x00008000L, 0x00108020L, 0x80100000L,
|
|
0x00100020L, 0x80000020L, 0x00000000L, 0x00108000L,
|
|
0x00008020L, 0x80108000L, 0x80100000L, 0x00008020L,
|
|
0x00000000L, 0x00108020L, 0x80100020L, 0x00100000L,
|
|
0x80008020L, 0x80100000L, 0x80108000L, 0x00008000L,
|
|
0x80100000L, 0x80008000L, 0x00000020L, 0x80108020L,
|
|
0x00108020L, 0x00000020L, 0x00008000L, 0x80000000L,
|
|
0x00008020L, 0x80108000L, 0x00100000L, 0x80000020L,
|
|
0x00100020L, 0x80008020L, 0x80000020L, 0x00100020L,
|
|
0x00108000L, 0x00000000L, 0x80008000L, 0x00008020L,
|
|
0x80000000L, 0x80100020L, 0x80108020L, 0x00108000L };
|
|
|
|
static uint32_t SP3[64] = {
|
|
0x00000208L, 0x08020200L, 0x00000000L, 0x08020008L,
|
|
0x08000200L, 0x00000000L, 0x00020208L, 0x08000200L,
|
|
0x00020008L, 0x08000008L, 0x08000008L, 0x00020000L,
|
|
0x08020208L, 0x00020008L, 0x08020000L, 0x00000208L,
|
|
0x08000000L, 0x00000008L, 0x08020200L, 0x00000200L,
|
|
0x00020200L, 0x08020000L, 0x08020008L, 0x00020208L,
|
|
0x08000208L, 0x00020200L, 0x00020000L, 0x08000208L,
|
|
0x00000008L, 0x08020208L, 0x00000200L, 0x08000000L,
|
|
0x08020200L, 0x08000000L, 0x00020008L, 0x00000208L,
|
|
0x00020000L, 0x08020200L, 0x08000200L, 0x00000000L,
|
|
0x00000200L, 0x00020008L, 0x08020208L, 0x08000200L,
|
|
0x08000008L, 0x00000200L, 0x00000000L, 0x08020008L,
|
|
0x08000208L, 0x00020000L, 0x08000000L, 0x08020208L,
|
|
0x00000008L, 0x00020208L, 0x00020200L, 0x08000008L,
|
|
0x08020000L, 0x08000208L, 0x00000208L, 0x08020000L,
|
|
0x00020208L, 0x00000008L, 0x08020008L, 0x00020200L };
|
|
|
|
static uint32_t SP4[64] = {
|
|
0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L,
|
|
0x00802080L, 0x00800081L, 0x00800001L, 0x00002001L,
|
|
0x00000000L, 0x00802000L, 0x00802000L, 0x00802081L,
|
|
0x00000081L, 0x00000000L, 0x00800080L, 0x00800001L,
|
|
0x00000001L, 0x00002000L, 0x00800000L, 0x00802001L,
|
|
0x00000080L, 0x00800000L, 0x00002001L, 0x00002080L,
|
|
0x00800081L, 0x00000001L, 0x00002080L, 0x00800080L,
|
|
0x00002000L, 0x00802080L, 0x00802081L, 0x00000081L,
|
|
0x00800080L, 0x00800001L, 0x00802000L, 0x00802081L,
|
|
0x00000081L, 0x00000000L, 0x00000000L, 0x00802000L,
|
|
0x00002080L, 0x00800080L, 0x00800081L, 0x00000001L,
|
|
0x00802001L, 0x00002081L, 0x00002081L, 0x00000080L,
|
|
0x00802081L, 0x00000081L, 0x00000001L, 0x00002000L,
|
|
0x00800001L, 0x00002001L, 0x00802080L, 0x00800081L,
|
|
0x00002001L, 0x00002080L, 0x00800000L, 0x00802001L,
|
|
0x00000080L, 0x00800000L, 0x00002000L, 0x00802080L };
|
|
|
|
static uint32_t SP5[64] = {
|
|
0x00000100L, 0x02080100L, 0x02080000L, 0x42000100L,
|
|
0x00080000L, 0x00000100L, 0x40000000L, 0x02080000L,
|
|
0x40080100L, 0x00080000L, 0x02000100L, 0x40080100L,
|
|
0x42000100L, 0x42080000L, 0x00080100L, 0x40000000L,
|
|
0x02000000L, 0x40080000L, 0x40080000L, 0x00000000L,
|
|
0x40000100L, 0x42080100L, 0x42080100L, 0x02000100L,
|
|
0x42080000L, 0x40000100L, 0x00000000L, 0x42000000L,
|
|
0x02080100L, 0x02000000L, 0x42000000L, 0x00080100L,
|
|
0x00080000L, 0x42000100L, 0x00000100L, 0x02000000L,
|
|
0x40000000L, 0x02080000L, 0x42000100L, 0x40080100L,
|
|
0x02000100L, 0x40000000L, 0x42080000L, 0x02080100L,
|
|
0x40080100L, 0x00000100L, 0x02000000L, 0x42080000L,
|
|
0x42080100L, 0x00080100L, 0x42000000L, 0x42080100L,
|
|
0x02080000L, 0x00000000L, 0x40080000L, 0x42000000L,
|
|
0x00080100L, 0x02000100L, 0x40000100L, 0x00080000L,
|
|
0x00000000L, 0x40080000L, 0x02080100L, 0x40000100L };
|
|
|
|
static uint32_t SP6[64] = {
|
|
0x20000010L, 0x20400000L, 0x00004000L, 0x20404010L,
|
|
0x20400000L, 0x00000010L, 0x20404010L, 0x00400000L,
|
|
0x20004000L, 0x00404010L, 0x00400000L, 0x20000010L,
|
|
0x00400010L, 0x20004000L, 0x20000000L, 0x00004010L,
|
|
0x00000000L, 0x00400010L, 0x20004010L, 0x00004000L,
|
|
0x00404000L, 0x20004010L, 0x00000010L, 0x20400010L,
|
|
0x20400010L, 0x00000000L, 0x00404010L, 0x20404000L,
|
|
0x00004010L, 0x00404000L, 0x20404000L, 0x20000000L,
|
|
0x20004000L, 0x00000010L, 0x20400010L, 0x00404000L,
|
|
0x20404010L, 0x00400000L, 0x00004010L, 0x20000010L,
|
|
0x00400000L, 0x20004000L, 0x20000000L, 0x00004010L,
|
|
0x20000010L, 0x20404010L, 0x00404000L, 0x20400000L,
|
|
0x00404010L, 0x20404000L, 0x00000000L, 0x20400010L,
|
|
0x00000010L, 0x00004000L, 0x20400000L, 0x00404010L,
|
|
0x00004000L, 0x00400010L, 0x20004010L, 0x00000000L,
|
|
0x20404000L, 0x20000000L, 0x00400010L, 0x20004010L };
|
|
|
|
static uint32_t SP7[64] = {
|
|
0x00200000L, 0x04200002L, 0x04000802L, 0x00000000L,
|
|
0x00000800L, 0x04000802L, 0x00200802L, 0x04200800L,
|
|
0x04200802L, 0x00200000L, 0x00000000L, 0x04000002L,
|
|
0x00000002L, 0x04000000L, 0x04200002L, 0x00000802L,
|
|
0x04000800L, 0x00200802L, 0x00200002L, 0x04000800L,
|
|
0x04000002L, 0x04200000L, 0x04200800L, 0x00200002L,
|
|
0x04200000L, 0x00000800L, 0x00000802L, 0x04200802L,
|
|
0x00200800L, 0x00000002L, 0x04000000L, 0x00200800L,
|
|
0x04000000L, 0x00200800L, 0x00200000L, 0x04000802L,
|
|
0x04000802L, 0x04200002L, 0x04200002L, 0x00000002L,
|
|
0x00200002L, 0x04000000L, 0x04000800L, 0x00200000L,
|
|
0x04200800L, 0x00000802L, 0x00200802L, 0x04200800L,
|
|
0x00000802L, 0x04000002L, 0x04200802L, 0x04200000L,
|
|
0x00200800L, 0x00000000L, 0x00000002L, 0x04200802L,
|
|
0x00000000L, 0x00200802L, 0x04200000L, 0x00000800L,
|
|
0x04000002L, 0x04000800L, 0x00000800L, 0x00200002L };
|
|
|
|
static uint32_t SP8[64] = {
|
|
0x10001040L, 0x00001000L, 0x00040000L, 0x10041040L,
|
|
0x10000000L, 0x10001040L, 0x00000040L, 0x10000000L,
|
|
0x00040040L, 0x10040000L, 0x10041040L, 0x00041000L,
|
|
0x10041000L, 0x00041040L, 0x00001000L, 0x00000040L,
|
|
0x10040000L, 0x10000040L, 0x10001000L, 0x00001040L,
|
|
0x00041000L, 0x00040040L, 0x10040040L, 0x10041000L,
|
|
0x00001040L, 0x00000000L, 0x00000000L, 0x10040040L,
|
|
0x10000040L, 0x10001000L, 0x00041040L, 0x00040000L,
|
|
0x00041040L, 0x00040000L, 0x10041000L, 0x00001000L,
|
|
0x00000040L, 0x10040040L, 0x00001000L, 0x00041040L,
|
|
0x10001000L, 0x00000040L, 0x10000040L, 0x10040000L,
|
|
0x10040040L, 0x10000000L, 0x00040000L, 0x10001040L,
|
|
0x00000000L, 0x10041040L, 0x00040040L, 0x10000040L,
|
|
0x10040000L, 0x10001000L, 0x10001040L, 0x00000000L,
|
|
0x10041040L, 0x00041000L, 0x00041000L, 0x00001040L,
|
|
0x00001040L, 0x00040040L, 0x10000000L, 0x10041000L };
|
|
|
|
static void
|
|
IP(uint32_t v[2])
|
|
{
|
|
uint32_t work;
|
|
|
|
work = ((v[0] >> 4) ^ v[1]) & 0x0f0f0f0fL;
|
|
v[1] ^= work;
|
|
v[0] ^= (work << 4);
|
|
work = ((v[0] >> 16) ^ v[1]) & 0x0000ffffL;
|
|
v[1] ^= work;
|
|
v[0] ^= (work << 16);
|
|
work = ((v[1] >> 2) ^ v[0]) & 0x33333333L;
|
|
v[0] ^= work;
|
|
v[1] ^= (work << 2);
|
|
work = ((v[1] >> 8) ^ v[0]) & 0x00ff00ffL;
|
|
v[0] ^= work;
|
|
v[1] ^= (work << 8);
|
|
v[1] = ((v[1] << 1) | ((v[1] >> 31) & 1L)) & 0xffffffffL;
|
|
work = (v[0] ^ v[1]) & 0xaaaaaaaaL;
|
|
v[0] ^= work;
|
|
v[1] ^= work;
|
|
v[0] = ((v[0] << 1) | ((v[0] >> 31) & 1L)) & 0xffffffffL;
|
|
}
|
|
|
|
static void
|
|
FP(uint32_t v[2])
|
|
{
|
|
uint32_t work;
|
|
|
|
v[0] = (v[0] << 31) | (v[0] >> 1);
|
|
work = (v[1] ^ v[0]) & 0xaaaaaaaaL;
|
|
v[1] ^= work;
|
|
v[0] ^= work;
|
|
v[1] = (v[1] << 31) | (v[1] >> 1);
|
|
work = ((v[1] >> 8) ^ v[0]) & 0x00ff00ffL;
|
|
v[0] ^= work;
|
|
v[1] ^= (work << 8);
|
|
work = ((v[1] >> 2) ^ v[0]) & 0x33333333L;
|
|
v[0] ^= work;
|
|
v[1] ^= (work << 2);
|
|
work = ((v[0] >> 16) ^ v[1]) & 0x0000ffffL;
|
|
v[1] ^= work;
|
|
v[0] ^= (work << 16);
|
|
work = ((v[0] >> 4) ^ v[1]) & 0x0f0f0f0fL;
|
|
v[1] ^= work;
|
|
v[0] ^= (work << 4);
|
|
}
|
|
|
|
static void
|
|
desx(uint32_t block[2], DES_key_schedule *ks, int encp)
|
|
{
|
|
uint32_t *keys;
|
|
uint32_t fval, work, right, left;
|
|
int round;
|
|
|
|
left = block[0];
|
|
right = block[1];
|
|
|
|
if (encp) {
|
|
keys = &ks->ks[0];
|
|
|
|
for( round = 0; round < 8; round++ ) {
|
|
work = (right << 28) | (right >> 4);
|
|
work ^= *keys++;
|
|
fval = SP7[ work & 0x3fL];
|
|
fval |= SP5[(work >> 8) & 0x3fL];
|
|
fval |= SP3[(work >> 16) & 0x3fL];
|
|
fval |= SP1[(work >> 24) & 0x3fL];
|
|
work = right ^ *keys++;
|
|
fval |= SP8[ work & 0x3fL];
|
|
fval |= SP6[(work >> 8) & 0x3fL];
|
|
fval |= SP4[(work >> 16) & 0x3fL];
|
|
fval |= SP2[(work >> 24) & 0x3fL];
|
|
left ^= fval;
|
|
work = (left << 28) | (left >> 4);
|
|
work ^= *keys++;
|
|
fval = SP7[ work & 0x3fL];
|
|
fval |= SP5[(work >> 8) & 0x3fL];
|
|
fval |= SP3[(work >> 16) & 0x3fL];
|
|
fval |= SP1[(work >> 24) & 0x3fL];
|
|
work = left ^ *keys++;
|
|
fval |= SP8[ work & 0x3fL];
|
|
fval |= SP6[(work >> 8) & 0x3fL];
|
|
fval |= SP4[(work >> 16) & 0x3fL];
|
|
fval |= SP2[(work >> 24) & 0x3fL];
|
|
right ^= fval;
|
|
}
|
|
} else {
|
|
keys = &ks->ks[30];
|
|
|
|
for( round = 0; round < 8; round++ ) {
|
|
work = (right << 28) | (right >> 4);
|
|
work ^= *keys++;
|
|
fval = SP7[ work & 0x3fL];
|
|
fval |= SP5[(work >> 8) & 0x3fL];
|
|
fval |= SP3[(work >> 16) & 0x3fL];
|
|
fval |= SP1[(work >> 24) & 0x3fL];
|
|
work = right ^ *keys++;
|
|
fval |= SP8[ work & 0x3fL];
|
|
fval |= SP6[(work >> 8) & 0x3fL];
|
|
fval |= SP4[(work >> 16) & 0x3fL];
|
|
fval |= SP2[(work >> 24) & 0x3fL];
|
|
left ^= fval;
|
|
work = (left << 28) | (left >> 4);
|
|
keys -= 4;
|
|
work ^= *keys++;
|
|
fval = SP7[ work & 0x3fL];
|
|
fval |= SP5[(work >> 8) & 0x3fL];
|
|
fval |= SP3[(work >> 16) & 0x3fL];
|
|
fval |= SP1[(work >> 24) & 0x3fL];
|
|
work = left ^ *keys++;
|
|
fval |= SP8[ work & 0x3fL];
|
|
fval |= SP6[(work >> 8) & 0x3fL];
|
|
fval |= SP4[(work >> 16) & 0x3fL];
|
|
fval |= SP2[(work >> 24) & 0x3fL];
|
|
right ^= fval;
|
|
keys -= 4;
|
|
}
|
|
}
|
|
block[0] = right;
|
|
block[1] = left;
|
|
}
|