improving present
This commit is contained in:
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257ce629cc
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/* bcal_present.c */
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/*
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This file is part of the AVR-Crypto-Lib.
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Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
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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 as published by
|
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the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
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||||
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||||
This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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||||
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file bcal_present.c
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* \email daniel.otte@rub.de
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* \author Daniel Otte
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* \date 2009-01-09
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* \license GPLv3 or later
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*
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*/
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#include <stdlib.h>
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#include "blockcipher_descriptor.h"
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#include "present128.h"
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#include "keysize_descriptor.h"
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const char present128_str[] = "Present128";
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const uint8_t present128_keysize_desc[] = { KS_TYPE_LIST, 1, KS_INT(128),
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KS_TYPE_TERMINATOR };
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const bcdesc_t present128_desc = {
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BCDESC_TYPE_BLOCKCIPHER,
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BC_INIT_TYPE_2,
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present128_str,
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sizeof(present128_ctx_t),
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64,
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{(void_fpt)present128_init},
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{(void_fpt)present128_enc},
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{(void_fpt)present128_dec},
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(bc_free_fpt)NULL,
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present128_keysize_desc
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};
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@ -0,0 +1,32 @@
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/* bcal_present.h */
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/*
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This file is part of the AVR-Crypto-Lib.
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Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
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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 as published by
|
||||
the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
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||||
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file bcal_present.h
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* \email daniel.otte@rub.de
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* \author Daniel Otte
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* \date 2009-01-09
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* \license GPLv3 or later
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*
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*/
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#include "blockcipher_descriptor.h"
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#include "present128.h"
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#include "keysize_descriptor.h"
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extern const bcdesc_t present128_desc;
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@ -1,7 +1,7 @@
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/* bcal_present.c */
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/*
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This file is part of the ARM-Crypto-Lib.
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Copyright (C) 2006-2010 Daniel Otte (daniel.otte@rub.de)
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This file is part of the AVR-Crypto-Lib.
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Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
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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 as published by
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@ -27,25 +27,25 @@
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#include <stdlib.h>
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#include "blockcipher_descriptor.h"
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#include "present.h"
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#include "present80.h"
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#include "keysize_descriptor.h"
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const char present_str[] = "Present";
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const char present80_str[] = "Present80";
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const uint8_t present_keysize_desc[] = { KS_TYPE_LIST, 1, KS_INT(80),
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KS_TYPE_TERMINATOR };
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const uint8_t present80_keysize_desc[] = { KS_TYPE_LIST, 1, KS_INT(80),
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KS_TYPE_TERMINATOR };
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const bcdesc_t present_desc = {
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const bcdesc_t present80_desc = {
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BCDESC_TYPE_BLOCKCIPHER,
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BC_INIT_TYPE_1,
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present_str,
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sizeof(present_ctx_t),
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BC_INIT_TYPE_2,
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present80_str,
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sizeof(present80_ctx_t),
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64,
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{(void_fpt)present_init},
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{(void_fpt)present_enc},
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{(void_fpt)present_dec},
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{(void_fpt)present80_init},
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{(void_fpt)present80_enc},
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{(void_fpt)present80_dec},
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(bc_free_fpt)NULL,
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present_keysize_desc
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present80_keysize_desc
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};
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@ -1,6 +1,6 @@
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/* bcal_present.h */
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/*
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This file is part of the ARM-Crypto-Lib.
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This file is part of the AVR-Crypto-Lib.
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Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
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This program is free software: you can redistribute it and/or modify
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@ -26,7 +26,7 @@
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*/
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#include "blockcipher_descriptor.h"
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#include "present.h"
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#include "present80.h"
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#include "keysize_descriptor.h"
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extern const bcdesc_t present_desc;
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extern const bcdesc_t present80_desc;
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@ -1,132 +0,0 @@
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/* present.c */
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/*
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This file is part of the ARM-Crypto-Lib.
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Copyright (C) 2006-2010 Daniel Otte (daniel.otte@rub.de)
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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 as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* present.c
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* a implementation of the PRESENT block-cipher
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* author: Daniel Otte
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* email: daniel.otte@rub.de
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* license: GPLv3
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*
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* */
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#include <string.h>
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#include <stdint.h>
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#include "present.h"
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static uint8_t sbox(uint8_t b){
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const uint8_t sb[]={ 0xC, 0x5, 0x6, 0xB,
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0x9, 0x0, 0xA, 0xD,
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0x3, 0xE, 0xF, 0x8,
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0x4, 0x7, 0x1, 0x2 };
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return (((sb[b>>4])<<4)|(sb[b&0xf]));
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}
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static uint8_t sbox_inv(uint8_t b){
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const uint8_t sb[]={ 0x5, 0xE, 0xF, 0x8,
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0xC, 0x1, 0x2, 0xD,
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0xB, 0x4, 0x6, 0x3,
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0x0, 0x7, 0x9, 0xA };
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return (((sb[b>>4])<<4)|(sb[b&0xf]));
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}
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#define SHR_O(a) c=(a)&1; (a)>>=1;
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#define SHR_I(a) (a)=(c?0x8000:0x0000) | ((a)>>1);
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static void p(uint16_t* o, uint8_t* i){
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uint8_t c;
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uint8_t m,n;
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for(m=0; m<8; ++m){
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for(n=0; n<2; ++n){
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SHR_O(i[m]);
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SHR_I(o[0]);
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SHR_O(i[m]);
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SHR_I(o[1]);
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SHR_O(i[m]);
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SHR_I(o[2]);
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SHR_O(i[m]);
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SHR_I(o[3]);
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}
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}
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}
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static void p_inv(uint8_t* o, uint8_t* i){
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uint8_t tmp[8];
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p((uint16_t*)tmp, i);
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p((uint16_t*)o, tmp);
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}
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void present_init(const uint8_t* key, uint8_t keysize_b, present_ctx_t* ctx){
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uint8_t tmp[2];
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union __attribute__((packed)) {
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uint8_t v8[10];
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uint64_t v64;
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uint16_t v16[5];
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struct __attribute__((packed)) {
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uint8_t v8[1];
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uint16_t v16[4];
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} off1;
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} b;
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uint8_t i;
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memcpy(b.v8, key, 10);
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memcpy(&(ctx->k[0]), b.v8+2, 8);
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for(i=1; i<32; ++i){
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/* rotate buffer 19 right */
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memcpy(tmp, b.v8, 2);
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memmove(b.v8, b.v8+2, 8);
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memcpy(b.v8+8, tmp, 2);
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/* three shifts to do*/
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tmp[1]=b.v8[0];
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b.v64 >>= 3;
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b.v16[4] >>= 3;
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b.v8[9] |= tmp[1]<<5;
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b.v8[7] |= tmp[0]<<5;
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/* rotating done now substitution */
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b.v8[9] = (sbox(b.v8[9])&0xF0) | ((b.v8[9])&0x0F);
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/* xor with round counter */
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b.off1.v16[0] ^= (uint16_t)i<<7;
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memcpy(&(ctx->k[i]), b.v8+2, 8);
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}
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}
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void present_enc(void* buffer, present_ctx_t* ctx){
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uint8_t i,j,tmp[8];
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for(i=0; i<31; ++i){
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*((uint64_t*)buffer) ^= ctx->k[i];
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for(j=0; j<8; ++j){
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tmp[j] = sbox(((uint8_t*)buffer)[j]);
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}
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p((uint16_t*)buffer, tmp);
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}
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*((uint64_t*)buffer) ^= ctx->k[31];
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}
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void present_dec(void* buffer, present_ctx_t* ctx){
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uint8_t j,tmp[8];
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int8_t i;
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*((uint64_t*)buffer) ^= ctx->k[31];
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for(i=30; i>=0; --i){
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p_inv(tmp, (uint8_t*)buffer);
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for(j=0; j<8; ++j){
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((uint8_t*)buffer)[j] = sbox_inv(tmp[j]);
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}
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*((uint64_t*)buffer) ^= ctx->k[i];
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}
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}
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@ -0,0 +1,145 @@
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/* present128.c */
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/*
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This file is part of the AVR-Crypto-Lib.
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Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
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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 as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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||||
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You should have received a copy of the GNU General Public License
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||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* present128.c
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* a implementation of the PRESENT block-cipher
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* author: Daniel Otte
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* email: daniel.otte@rub.de
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* license: GPLv3
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*
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* */
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#include <string.h>
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#include <stdint.h>
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#include "memxor.h"
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#include "present_common.h"
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#include "present128.h"
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static
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void key_update_128(uint8_t* buffer, uint8_t round){
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uint8_t j;
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uint8_t t8;
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union __attribute__((packed)){
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uint8_t v8[2];
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uint16_t v16;
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} tmp;
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/* rotate buffer 67 right */
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for(j=0; j<8; ++j){
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tmp.v8[0] = buffer[j];
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buffer[j] = buffer[j + 8];
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buffer[j + 8] = tmp.v8[0];
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}
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j=0;
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t8 = (uint16_t)buffer[15] << (5);
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do{
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tmp.v8[1] = buffer[j];
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tmp.v16 >>= 3;
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buffer[j] = tmp.v8[1] | t8;
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t8 = tmp.v8[0] & 0xe0;
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}while(++j<16);
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/* rotating done now substitution */
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buffer[0] = present_sbox(buffer[0]);
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/* xor with round counter */
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buffer[8] ^= round << 6;
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buffer[7] ^= round >> 2;
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}
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static
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void key_update_128_inv(uint8_t* buffer, uint8_t round){
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uint8_t j;
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uint8_t t8;
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union __attribute__((packed)){
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uint8_t v8[2];
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uint16_t v16;
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} tmp;
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/* xor with round counter */
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buffer[8] ^= round << 6;
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buffer[7] ^= round >> 2;
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/* rotating done now substitution */
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buffer[0] = present_sbox_inv(buffer[0]);
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/* rotate buffer 67 left */
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for(j=0; j<8; ++j){
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tmp.v8[0] = buffer[j];
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buffer[j] = buffer[j + 8];
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buffer[j + 8] = tmp.v8[0];
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}
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j=15;
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t8 = (uint16_t)buffer[0] >> (5);
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do{
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tmp.v8[0] = buffer[j];
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tmp.v16 <<= 3;
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buffer[j] = tmp.v8[0] | t8;
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t8 = tmp.v8[1] & 0x07;
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}while(j--);
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}
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void present128_init(const uint8_t* key, uint8_t keysize_b, present128_ctx_t* ctx){
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uint8_t i;
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memcpy(ctx->fwd_key, key, 16);
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memcpy(ctx->rev_key, key, 16);
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for(i=1; i<32; ++i){
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key_update_128(ctx->rev_key, i);
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}
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}
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void present128_enc(void* buffer, present128_ctx_t* ctx){
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present_generic_enc(buffer, (uint8_t*)ctx, 16, key_update_128);
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}
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void present128_dec(void* buffer, present128_ctx_t* ctx){
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present_generic_dec(buffer, (uint8_t*)ctx, 16, key_update_128_inv);
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}
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/*
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void present128_enc(void* buffer, present128_ctx_t* ctx){
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uint8_t i,j,tmp[8], k[16];
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memcpy(k, ctx->fwd_key, 16);
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memxor(buffer, k, 8);
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for(i=1; i<32; ++i){
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j = 7;
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do{
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tmp[j] = present_sbox(((uint8_t*)buffer)[j]);
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}while(j--);
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present_p(buffer, tmp);
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key_update_128(k, i);
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memxor(buffer, k, 8);
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}
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}
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void present128_dec(void* buffer, present128_ctx_t* ctx){
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uint8_t j,tmp[8], k[16];
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uint8_t i;
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memcpy(k, ctx->rev_key, 16);
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memxor(buffer, k, 8);
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i = 31;
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do{
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present_p(tmp, buffer);
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present_p(buffer, tmp);
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j = 7;
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do{
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((uint8_t*)buffer)[j] = present_sbox_inv(((uint8_t*)buffer)[j]);
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}while(j--);
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key_update_128_inv(k, i);
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memxor(buffer, k, 8);
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}while(--i);
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}
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*/
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@ -0,0 +1,35 @@
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/* present128.h */
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/*
|
||||
This file is part of the AVR-Crypto-Lib.
|
||||
Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
|
||||
|
||||
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 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
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#ifndef PRESENT128_H_
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#define PRESENT128_H_
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#include <stdint.h>
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|
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typedef struct __attribute__((packed)) present128_ctx_st {
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uint8_t fwd_key[16];
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uint8_t rev_key[16];
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} present128_ctx_t;
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|
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|
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void present128_init(const uint8_t* key, uint8_t keysize_b, present128_ctx_t* ctx);
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void present128_enc(void* buffer, present128_ctx_t* ctx);
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void present128_dec(void* buffer, present128_ctx_t* ctx);
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|
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#endif /*PRESENT128_H_*/
|
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@ -0,0 +1,144 @@
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/* present80.c */
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||||
/*
|
||||
This file is part of the AVR-Crypto-Lib.
|
||||
Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
|
||||
|
||||
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 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
/**
|
||||
* present80.c
|
||||
* a implementation of the PRESENT block-cipher
|
||||
* author: Daniel Otte
|
||||
* email: daniel.otte@rub.de
|
||||
* license: GPLv3
|
||||
*
|
||||
* */
|
||||
|
||||
#include <string.h>
|
||||
#include <stdint.h>
|
||||
#include "memxor.h"
|
||||
#include "present_common.h"
|
||||
#include "present80.h"
|
||||
|
||||
static
|
||||
void key_update(uint8_t* buffer, uint8_t round){
|
||||
uint8_t j;
|
||||
union __attribute__((packed)){
|
||||
uint8_t v8[2];
|
||||
uint16_t v16;
|
||||
} tmp;
|
||||
/* rotate buffer 19 right */
|
||||
tmp.v16 = ((uint16_t*)buffer)[4];
|
||||
j=4;
|
||||
do{
|
||||
((uint16_t*)buffer)[j] = ((uint16_t*)buffer)[j-1];
|
||||
}while(--j);
|
||||
((uint16_t*)buffer)[0] = tmp.v16;
|
||||
uint8_t t8;
|
||||
j=0;
|
||||
t8 = (uint16_t)buffer[9] << (5);
|
||||
do{
|
||||
tmp.v8[1] = buffer[j];
|
||||
tmp.v16 >>= 3;
|
||||
buffer[j] = tmp.v8[1] | t8;
|
||||
t8 = tmp.v8[0] & 0xe0;
|
||||
}while(++j<10);
|
||||
/* rotating done now substitution */
|
||||
buffer[0] = (present_sbox(buffer[0])&0xF0) | ((buffer[0])&0x0F);
|
||||
/* xor with round counter */
|
||||
buffer[8] ^= round << 7;
|
||||
buffer[7] ^= round >> 1;
|
||||
}
|
||||
|
||||
static
|
||||
void key_update_inv(uint8_t* buffer, uint8_t round){
|
||||
uint8_t j;
|
||||
union __attribute__((packed)){
|
||||
uint8_t v8[2];
|
||||
uint16_t v16;
|
||||
} tmp;
|
||||
/* xor with round counter */
|
||||
buffer[8] ^= round << 7;
|
||||
buffer[7] ^= round >> 1;
|
||||
/* rotating done now substitution */
|
||||
buffer[0] = (present_sbox_inv(buffer[0])&0xF0) | ((buffer[0])&0x0F);
|
||||
/* rotate buffer 19 left */
|
||||
tmp.v16 = ((uint16_t*)buffer)[0];
|
||||
j=0;
|
||||
do{
|
||||
((uint16_t*)buffer)[j] = ((uint16_t*)buffer)[j+1];
|
||||
}while(++j<4);
|
||||
((uint16_t*)buffer)[4] = tmp.v16;
|
||||
uint8_t t8;
|
||||
j=9;
|
||||
t8 = (uint16_t)buffer[0] >> (5);
|
||||
do{
|
||||
tmp.v8[0] = buffer[j];
|
||||
tmp.v16 <<= 3;
|
||||
buffer[j] = tmp.v8[0] | t8;
|
||||
t8 = tmp.v8[1] & 0x07;
|
||||
}while(j--);
|
||||
}
|
||||
|
||||
void present80_init(const uint8_t* key, uint8_t keysize_b, present80_ctx_t* ctx){
|
||||
uint8_t i;
|
||||
memcpy(ctx->fwd_key, key, 10);
|
||||
memcpy(ctx->rev_key, key, 10);
|
||||
for(i=1; i<32; ++i){
|
||||
key_update(ctx->rev_key, i);
|
||||
}
|
||||
}
|
||||
|
||||
void present80_enc(void* buffer, present80_ctx_t* ctx){
|
||||
present_generic_enc(buffer, (uint8_t*)ctx, 10, key_update);
|
||||
}
|
||||
|
||||
void present80_dec(void* buffer, present80_ctx_t* ctx){
|
||||
present_generic_dec(buffer, (uint8_t*)ctx, 10, key_update_inv);
|
||||
}
|
||||
|
||||
/*
|
||||
void present80_enc(void* buffer, present80_ctx_t* ctx){
|
||||
uint8_t i,j,tmp[8], k[10];
|
||||
memcpy(k, ctx->fwd_key, 10);
|
||||
memxor(buffer, k, 8);
|
||||
for(i=1; i<32; ++i){
|
||||
j = 7;
|
||||
do{
|
||||
tmp[j] = present_sbox(((uint8_t*)buffer)[j]);
|
||||
}while(j--);
|
||||
present_p(buffer, tmp);
|
||||
key_update(k, i);
|
||||
memxor(buffer, k, 8);
|
||||
}
|
||||
}
|
||||
|
||||
void present80_dec(void* buffer, present80_ctx_t* ctx){
|
||||
uint8_t j,tmp[8], k[10];
|
||||
uint8_t i;
|
||||
memcpy(k, ctx->rev_key, 10);
|
||||
memxor(buffer, k, 8);
|
||||
i = 31;
|
||||
do{
|
||||
present_p(tmp, buffer);
|
||||
present_p(buffer, tmp);
|
||||
j = 7;
|
||||
do{
|
||||
((uint8_t*)buffer)[j] = sbox_inv(((uint8_t*)buffer)[j]);
|
||||
}while(j--);
|
||||
key_update_inv(k, i);
|
||||
memxor(buffer, k, 8);
|
||||
}while(--i);
|
||||
}
|
||||
*/
|
|
@ -0,0 +1,34 @@
|
|||
/* present.h */
|
||||
/*
|
||||
This file is part of the AVR-Crypto-Lib.
|
||||
Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
|
||||
|
||||
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 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
#ifndef PRESENT80_COMMON_H_
|
||||
#define PRESENT80_COMMON_H_
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
typedef struct __attribute__((packed)) present80_ctx_st {
|
||||
uint8_t fwd_key[10];
|
||||
uint8_t rev_key[10];
|
||||
} present80_ctx_t;
|
||||
|
||||
|
||||
void present80_init(const uint8_t* key, uint8_t keysize_b, present80_ctx_t* ctx);
|
||||
void present80_enc(void* buffer, present80_ctx_t* ctx);
|
||||
void present80_dec(void* buffer, present80_ctx_t* ctx);
|
||||
|
||||
#endif /*PRESENT80_H_*/
|
|
@ -0,0 +1,103 @@
|
|||
/* present_common.c */
|
||||
/*
|
||||
This file is part of the AVR-Crypto-Lib.
|
||||
Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
|
||||
|
||||
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 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
/**
|
||||
* present_common.c
|
||||
* a implementation of the PRESENT block-cipher
|
||||
* author: Daniel Otte
|
||||
* email: daniel.otte@rub.de
|
||||
* license: GPLv3
|
||||
*
|
||||
* */
|
||||
|
||||
#include <string.h>
|
||||
#include <stdint.h>
|
||||
#include "memxor.h"
|
||||
|
||||
uint8_t present_sbox(uint8_t b){
|
||||
static const uint8_t sb[] = {
|
||||
0xC, 0x5, 0x6, 0xB,
|
||||
0x9, 0x0, 0xA, 0xD,
|
||||
0x3, 0xE, 0xF, 0x8,
|
||||
0x4, 0x7, 0x1, 0x2
|
||||
};
|
||||
return ((sb[b >> 4]) << 4) | (sb[b & 0xf]);
|
||||
}
|
||||
|
||||
uint8_t present_sbox_inv(uint8_t b){
|
||||
static const uint8_t sb[] = {
|
||||
0x5, 0xE, 0xF, 0x8,
|
||||
0xC, 0x1, 0x2, 0xD,
|
||||
0xB, 0x4, 0x6, 0x3,
|
||||
0x0, 0x7, 0x9, 0xA
|
||||
};
|
||||
return ((sb[b >> 4]) << 4) | (sb[b & 0xf]);
|
||||
}
|
||||
|
||||
void present_p(uint8_t* o, uint8_t* i){
|
||||
uint8_t m,n=0,idx=0;
|
||||
for(m=0; m<64; ++m){
|
||||
o[idx] <<= 1;
|
||||
o[idx] |= i[n] >> 7;
|
||||
i[n] <<= 1;
|
||||
idx = (idx + 2) & 7;
|
||||
if((m & 7) == 7){
|
||||
++n;
|
||||
}
|
||||
if(m == 31){
|
||||
idx += 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void present_generic_enc(void* buffer, uint8_t* ctx, uint8_t ksize_B,
|
||||
void(*update)(uint8_t*, uint8_t)){
|
||||
uint8_t i,j,tmp[8], k[ksize_B];
|
||||
memcpy(k, ctx, ksize_B);
|
||||
memxor(buffer, k, 8);
|
||||
for(i=1; i<32; ++i){
|
||||
j = 7;
|
||||
do{
|
||||
tmp[j] = present_sbox(((uint8_t*)buffer)[j]);
|
||||
}while(j--);
|
||||
present_p(buffer, tmp);
|
||||
update(k, i);
|
||||
memxor(buffer, k, 8);
|
||||
}
|
||||
}
|
||||
|
||||
void present_generic_dec(void* buffer, uint8_t* ctx, uint8_t ksize_B,
|
||||
void(*update)(uint8_t*, uint8_t)){
|
||||
uint8_t j,tmp[8], k[ksize_B];
|
||||
uint8_t i;
|
||||
memcpy(k, ctx + ksize_B, ksize_B);
|
||||
memxor(buffer, k, 8);
|
||||
i = 31;
|
||||
do{
|
||||
present_p(tmp, buffer);
|
||||
present_p(buffer, tmp);
|
||||
j = 7;
|
||||
do{
|
||||
((uint8_t*)buffer)[j] = present_sbox_inv(((uint8_t*)buffer)[j]);
|
||||
}while(j--);
|
||||
update(k, i);
|
||||
memxor(buffer, k, 8);
|
||||
}while(--i);
|
||||
}
|
||||
|
|
@ -0,0 +1,33 @@
|
|||
/* present_common.h */
|
||||
/*
|
||||
This file is part of the AVR-Crypto-Lib.
|
||||
Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
|
||||
|
||||
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 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
#ifndef PRESENT_COMMON_H_
|
||||
#define PRESENT_COMMON_H_
|
||||
|
||||
#include <stdint.h>
|
||||
|
||||
uint8_t present_sbox(uint8_t b);
|
||||
uint8_t present_sbox_inv(uint8_t b);
|
||||
void present_p(uint8_t* o, uint8_t* i);
|
||||
|
||||
void present_generic_enc(void* buffer, uint8_t* ctx, uint8_t ksize_B,
|
||||
void(*update)(uint8_t*, uint8_t));
|
||||
void present_generic_dec(void* buffer, uint8_t* ctx, uint8_t ksize_B,
|
||||
void(*update)(uint8_t*, uint8_t));
|
||||
|
||||
#endif /*PRESENT_H_*/
|
|
@ -0,0 +1,102 @@
|
|||
/* present.c */
|
||||
/*
|
||||
This file is part of the AVR-Crypto-Lib.
|
||||
Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
|
||||
|
||||
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 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
/**
|
||||
* present.c
|
||||
* a implementation of the PRESENT block-cipher
|
||||
* author: Daniel Otte
|
||||
* email: daniel.otte@rub.de
|
||||
* license: GPLv3
|
||||
*
|
||||
* */
|
||||
|
||||
#include <string.h>
|
||||
#include <stdint.h>
|
||||
#include "present_speed.h"
|
||||
|
||||
static
|
||||
void key_update(uint8_t* buffer, uint8_t round){
|
||||
uint8_t j;
|
||||
union __attribute__((packed)){
|
||||
uint8_t v8[2];
|
||||
uint16_t v16;
|
||||
} tmp;
|
||||
/* rotate buffer 19 right */
|
||||
tmp.v16 = ((uint16_t*)buffer)[4];
|
||||
j=4;
|
||||
do{
|
||||
((uint16_t*)buffer)[j] = ((uint16_t*)buffer)[j-1];
|
||||
}while(--j);
|
||||
((uint16_t*)buffer)[0] = tmp.v16;
|
||||
uint8_t t8;
|
||||
j=0;
|
||||
t8 = (uint16_t)buffer[9] << (5);
|
||||
do{
|
||||
tmp.v8[1] = buffer[j];
|
||||
tmp.v16 >>= 3;
|
||||
buffer[j] = tmp.v8[1] | t8;
|
||||
t8 = tmp.v8[0] & 0xe0;
|
||||
}while(++j<10);
|
||||
/* rotating done now substitution */
|
||||
buffer[0] = (present_sbox(buffer[0])&0xF0) | ((buffer[0])&0x0F);
|
||||
/* xor with round counter */
|
||||
buffer[8] ^= round << 7;
|
||||
buffer[7] ^= round >> 1;
|
||||
}
|
||||
|
||||
void present_init(const uint8_t* key, uint8_t keysize_b, present_ctx_t* ctx){
|
||||
uint8_t i,key_buffer[10];
|
||||
memcpy(key_buffer, key, 10);
|
||||
memcpy(&(ctx->k[0]), key_buffer, 8);
|
||||
for(i=1; i<32; ++i){
|
||||
key_update(key_buffer, i);
|
||||
memcpy(&(ctx->k[i]), key_buffer, 8);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
void present_enc(void* buffer, present_ctx_t* ctx){
|
||||
uint8_t i,j,tmp[8];
|
||||
for(i=0; i<31; ++i){
|
||||
*((uint64_t*)buffer) ^= ctx->k[i];
|
||||
memxor(buffer, &ctx->k[i], 8);
|
||||
j = 7;
|
||||
do{
|
||||
tmp[j] = present_sbox(((uint8_t*)buffer)[j]);
|
||||
}while(j--);
|
||||
present_p(buffer, tmp);
|
||||
}
|
||||
memxor(buffer, &ctx->k[31], 8);
|
||||
}
|
||||
|
||||
|
||||
void present_dec(void* buffer, present_ctx_t* ctx){
|
||||
uint8_t j,tmp[8];
|
||||
uint8_t i;
|
||||
memxor(buffer, &ctx->k[31], 8);
|
||||
i = 30;
|
||||
do{
|
||||
present_p(tmp, buffer);
|
||||
present_p(buffer, tmp);
|
||||
j = 7;
|
||||
do{
|
||||
((uint8_t*)buffer)[j] = present_sbox_inv(((uint8_t*)buffer)[j]);
|
||||
}while(j--);
|
||||
memxor(buffer, &ctx->k[i], 8);
|
||||
}while(i--);
|
||||
}
|
|
@ -1,6 +1,6 @@
|
|||
/* present.h */
|
||||
/*
|
||||
This file is part of the ARM-Crypto-Lib.
|
||||
This file is part of the AVR-Crypto-Lib.
|
||||
Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
|
||||
|
||||
This program is free software: you can redistribute it and/or modify
|
Loading…
Reference in New Issue