Git-Mirrors/monero
1
0
Fork 0
mirror of https://github.com/monero-project/monero.git synced 2024-10-01 11:49:47 -04:00
Code Issues Packages Projects Releases Wiki Activity
266c639f4f
monero/src/crypto/oaes_lib.c
fluffypony 266c639f4f more FreeBSD fixes
2014-09-09 14:49:13 +02:00

1471 lines
43 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/*
* ---------------------------------------------------------------------------
* OpenAES License
* ---------------------------------------------------------------------------
* Copyright (c) 2012, Nabil S. Al Ramli, www.nalramli.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
* ---------------------------------------------------------------------------
*/
static const char _NR[] = {
0x4e,0x61,0x62,0x69,0x6c,0x20,0x53,0x2e,0x20,
0x41,0x6c,0x20,0x52,0x61,0x6d,0x6c,0x69,0x00 };
#include <stddef.h>
#include <time.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
// Both OS X and FreeBSD don't need malloc.h
#if !defined(__APPLE__) && !defined(__FreeBSD__)
#include <malloc.h>
#endif
// FreeBSD also doesn't need timeb.h
#ifndef __FreeBSD__
#include <sys/timeb.h>
#endif
#ifdef WIN32
#include <process.h>
#else
#include <sys/types.h>
#include <unistd.h>
#endif
#include "oaes_config.h"
#include "oaes_lib.h"
#ifdef OAES_HAVE_ISAAC
#include "rand.h"
#endif // OAES_HAVE_ISAAC
#define OAES_RKEY_LEN 4
#define OAES_COL_LEN 4
#define OAES_ROUND_BASE 7
// the block is padded
#define OAES_FLAG_PAD 0x01
#ifndef min
# define min(a,b) (((a)<(b)) ? (a) : (b))
#endif /* min */
// "OAES<8-bit header version><8-bit type><16-bit options><8-bit flags><56-bit reserved>"
static uint8_t oaes_header[OAES_BLOCK_SIZE] = {
// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f,
/*0*/ 0x4f, 0x41, 0x45, 0x53, 0x01, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
static uint8_t oaes_gf_8[] = {
0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36 };
static uint8_t oaes_sub_byte_value[16][16] = {
// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f,
/*0*/ { 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76 },
/*1*/ { 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0 },
/*2*/ { 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15 },
/*3*/ { 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75 },
/*4*/ { 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84 },
/*5*/ { 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf },
/*6*/ { 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8 },
/*7*/ { 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2 },
/*8*/ { 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73 },
/*9*/ { 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb },
/*a*/ { 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79 },
/*b*/ { 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08 },
/*c*/ { 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a },
/*d*/ { 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e },
/*e*/ { 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf },
/*f*/ { 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 },
};
static uint8_t oaes_inv_sub_byte_value[16][16] = {
// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f,
/*0*/ { 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb },
/*1*/ { 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb },
/*2*/ { 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e },
/*3*/ { 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25 },
/*4*/ { 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92 },
/*5*/ { 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84 },
/*6*/ { 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06 },
/*7*/ { 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b },
/*8*/ { 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73 },
/*9*/ { 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e },
/*a*/ { 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b },
/*b*/ { 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4 },
/*c*/ { 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f },
/*d*/ { 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef },
/*e*/ { 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61 },
/*f*/ { 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d },
};
static uint8_t oaes_gf_mul_2[16][16] = {
// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f,
/*0*/ { 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e },
/*1*/ { 0x20, 0x22, 0x24, 0x26, 0x28, 0x2a, 0x2c, 0x2e, 0x30, 0x32, 0x34, 0x36, 0x38, 0x3a, 0x3c, 0x3e },
/*2*/ { 0x40, 0x42, 0x44, 0x46, 0x48, 0x4a, 0x4c, 0x4e, 0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e },
/*3*/ { 0x60, 0x62, 0x64, 0x66, 0x68, 0x6a, 0x6c, 0x6e, 0x70, 0x72, 0x74, 0x76, 0x78, 0x7a, 0x7c, 0x7e },
/*4*/ { 0x80, 0x82, 0x84, 0x86, 0x88, 0x8a, 0x8c, 0x8e, 0x90, 0x92, 0x94, 0x96, 0x98, 0x9a, 0x9c, 0x9e },
/*5*/ { 0xa0, 0xa2, 0xa4, 0xa6, 0xa8, 0xaa, 0xac, 0xae, 0xb0, 0xb2, 0xb4, 0xb6, 0xb8, 0xba, 0xbc, 0xbe },
/*6*/ { 0xc0, 0xc2, 0xc4, 0xc6, 0xc8, 0xca, 0xcc, 0xce, 0xd0, 0xd2, 0xd4, 0xd6, 0xd8, 0xda, 0xdc, 0xde },
/*7*/ { 0xe0, 0xe2, 0xe4, 0xe6, 0xe8, 0xea, 0xec, 0xee, 0xf0, 0xf2, 0xf4, 0xf6, 0xf8, 0xfa, 0xfc, 0xfe },
/*8*/ { 0x1b, 0x19, 0x1f, 0x1d, 0x13, 0x11, 0x17, 0x15, 0x0b, 0x09, 0x0f, 0x0d, 0x03, 0x01, 0x07, 0x05 },
/*9*/ { 0x3b, 0x39, 0x3f, 0x3d, 0x33, 0x31, 0x37, 0x35, 0x2b, 0x29, 0x2f, 0x2d, 0x23, 0x21, 0x27, 0x25 },
/*a*/ { 0x5b, 0x59, 0x5f, 0x5d, 0x53, 0x51, 0x57, 0x55, 0x4b, 0x49, 0x4f, 0x4d, 0x43, 0x41, 0x47, 0x45 },
/*b*/ { 0x7b, 0x79, 0x7f, 0x7d, 0x73, 0x71, 0x77, 0x75, 0x6b, 0x69, 0x6f, 0x6d, 0x63, 0x61, 0x67, 0x65 },
/*c*/ { 0x9b, 0x99, 0x9f, 0x9d, 0x93, 0x91, 0x97, 0x95, 0x8b, 0x89, 0x8f, 0x8d, 0x83, 0x81, 0x87, 0x85 },
/*d*/ { 0xbb, 0xb9, 0xbf, 0xbd, 0xb3, 0xb1, 0xb7, 0xb5, 0xab, 0xa9, 0xaf, 0xad, 0xa3, 0xa1, 0xa7, 0xa5 },
/*e*/ { 0xdb, 0xd9, 0xdf, 0xdd, 0xd3, 0xd1, 0xd7, 0xd5, 0xcb, 0xc9, 0xcf, 0xcd, 0xc3, 0xc1, 0xc7, 0xc5 },
/*f*/ { 0xfb, 0xf9, 0xff, 0xfd, 0xf3, 0xf1, 0xf7, 0xf5, 0xeb, 0xe9, 0xef, 0xed, 0xe3, 0xe1, 0xe7, 0xe5 },
};
static uint8_t oaes_gf_mul_3[16][16] = {
// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f,
/*0*/ { 0x00, 0x03, 0x06, 0x05, 0x0c, 0x0f, 0x0a, 0x09, 0x18, 0x1b, 0x1e, 0x1d, 0x14, 0x17, 0x12, 0x11 },
/*1*/ { 0x30, 0x33, 0x36, 0x35, 0x3c, 0x3f, 0x3a, 0x39, 0x28, 0x2b, 0x2e, 0x2d, 0x24, 0x27, 0x22, 0x21 },
/*2*/ { 0x60, 0x63, 0x66, 0x65, 0x6c, 0x6f, 0x6a, 0x69, 0x78, 0x7b, 0x7e, 0x7d, 0x74, 0x77, 0x72, 0x71 },
/*3*/ { 0x50, 0x53, 0x56, 0x55, 0x5c, 0x5f, 0x5a, 0x59, 0x48, 0x4b, 0x4e, 0x4d, 0x44, 0x47, 0x42, 0x41 },
/*4*/ { 0xc0, 0xc3, 0xc6, 0xc5, 0xcc, 0xcf, 0xca, 0xc9, 0xd8, 0xdb, 0xde, 0xdd, 0xd4, 0xd7, 0xd2, 0xd1 },
/*5*/ { 0xf0, 0xf3, 0xf6, 0xf5, 0xfc, 0xff, 0xfa, 0xf9, 0xe8, 0xeb, 0xee, 0xed, 0xe4, 0xe7, 0xe2, 0xe1 },
/*6*/ { 0xa0, 0xa3, 0xa6, 0xa5, 0xac, 0xaf, 0xaa, 0xa9, 0xb8, 0xbb, 0xbe, 0xbd, 0xb4, 0xb7, 0xb2, 0xb1 },
/*7*/ { 0x90, 0x93, 0x96, 0x95, 0x9c, 0x9f, 0x9a, 0x99, 0x88, 0x8b, 0x8e, 0x8d, 0x84, 0x87, 0x82, 0x81 },
/*8*/ { 0x9b, 0x98, 0x9d, 0x9e, 0x97, 0x94, 0x91, 0x92, 0x83, 0x80, 0x85, 0x86, 0x8f, 0x8c, 0x89, 0x8a },
/*9*/ { 0xab, 0xa8, 0xad, 0xae, 0xa7, 0xa4, 0xa1, 0xa2, 0xb3, 0xb0, 0xb5, 0xb6, 0xbf, 0xbc, 0xb9, 0xba },
/*a*/ { 0xfb, 0xf8, 0xfd, 0xfe, 0xf7, 0xf4, 0xf1, 0xf2, 0xe3, 0xe0, 0xe5, 0xe6, 0xef, 0xec, 0xe9, 0xea },
/*b*/ { 0xcb, 0xc8, 0xcd, 0xce, 0xc7, 0xc4, 0xc1, 0xc2, 0xd3, 0xd0, 0xd5, 0xd6, 0xdf, 0xdc, 0xd9, 0xda },
/*c*/ { 0x5b, 0x58, 0x5d, 0x5e, 0x57, 0x54, 0x51, 0x52, 0x43, 0x40, 0x45, 0x46, 0x4f, 0x4c, 0x49, 0x4a },
/*d*/ { 0x6b, 0x68, 0x6d, 0x6e, 0x67, 0x64, 0x61, 0x62, 0x73, 0x70, 0x75, 0x76, 0x7f, 0x7c, 0x79, 0x7a },
/*e*/ { 0x3b, 0x38, 0x3d, 0x3e, 0x37, 0x34, 0x31, 0x32, 0x23, 0x20, 0x25, 0x26, 0x2f, 0x2c, 0x29, 0x2a },
/*f*/ { 0x0b, 0x08, 0x0d, 0x0e, 0x07, 0x04, 0x01, 0x02, 0x13, 0x10, 0x15, 0x16, 0x1f, 0x1c, 0x19, 0x1a },
};
static uint8_t oaes_gf_mul_9[16][16] = {
// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f,
/*0*/ { 0x00, 0x09, 0x12, 0x1b, 0x24, 0x2d, 0x36, 0x3f, 0x48, 0x41, 0x5a, 0x53, 0x6c, 0x65, 0x7e, 0x77 },
/*1*/ { 0x90, 0x99, 0x82, 0x8b, 0xb4, 0xbd, 0xa6, 0xaf, 0xd8, 0xd1, 0xca, 0xc3, 0xfc, 0xf5, 0xee, 0xe7 },
/*2*/ { 0x3b, 0x32, 0x29, 0x20, 0x1f, 0x16, 0x0d, 0x04, 0x73, 0x7a, 0x61, 0x68, 0x57, 0x5e, 0x45, 0x4c },
/*3*/ { 0xab, 0xa2, 0xb9, 0xb0, 0x8f, 0x86, 0x9d, 0x94, 0xe3, 0xea, 0xf1, 0xf8, 0xc7, 0xce, 0xd5, 0xdc },
/*4*/ { 0x76, 0x7f, 0x64, 0x6d, 0x52, 0x5b, 0x40, 0x49, 0x3e, 0x37, 0x2c, 0x25, 0x1a, 0x13, 0x08, 0x01 },
/*5*/ { 0xe6, 0xef, 0xf4, 0xfd, 0xc2, 0xcb, 0xd0, 0xd9, 0xae, 0xa7, 0xbc, 0xb5, 0x8a, 0x83, 0x98, 0x91 },
/*6*/ { 0x4d, 0x44, 0x5f, 0x56, 0x69, 0x60, 0x7b, 0x72, 0x05, 0x0c, 0x17, 0x1e, 0x21, 0x28, 0x33, 0x3a },
/*7*/ { 0xdd, 0xd4, 0xcf, 0xc6, 0xf9, 0xf0, 0xeb, 0xe2, 0x95, 0x9c, 0x87, 0x8e, 0xb1, 0xb8, 0xa3, 0xaa },
/*8*/ { 0xec, 0xe5, 0xfe, 0xf7, 0xc8, 0xc1, 0xda, 0xd3, 0xa4, 0xad, 0xb6, 0xbf, 0x80, 0x89, 0x92, 0x9b },
/*9*/ { 0x7c, 0x75, 0x6e, 0x67, 0x58, 0x51, 0x4a, 0x43, 0x34, 0x3d, 0x26, 0x2f, 0x10, 0x19, 0x02, 0x0b },
/*a*/ { 0xd7, 0xde, 0xc5, 0xcc, 0xf3, 0xfa, 0xe1, 0xe8, 0x9f, 0x96, 0x8d, 0x84, 0xbb, 0xb2, 0xa9, 0xa0 },
/*b*/ { 0x47, 0x4e, 0x55, 0x5c, 0x63, 0x6a, 0x71, 0x78, 0x0f, 0x06, 0x1d, 0x14, 0x2b, 0x22, 0x39, 0x30 },
/*c*/ { 0x9a, 0x93, 0x88, 0x81, 0xbe, 0xb7, 0xac, 0xa5, 0xd2, 0xdb, 0xc0, 0xc9, 0xf6, 0xff, 0xe4, 0xed },
/*d*/ { 0x0a, 0x03, 0x18, 0x11, 0x2e, 0x27, 0x3c, 0x35, 0x42, 0x4b, 0x50, 0x59, 0x66, 0x6f, 0x74, 0x7d },
/*e*/ { 0xa1, 0xa8, 0xb3, 0xba, 0x85, 0x8c, 0x97, 0x9e, 0xe9, 0xe0, 0xfb, 0xf2, 0xcd, 0xc4, 0xdf, 0xd6 },
/*f*/ { 0x31, 0x38, 0x23, 0x2a, 0x15, 0x1c, 0x07, 0x0e, 0x79, 0x70, 0x6b, 0x62, 0x5d, 0x54, 0x4f, 0x46 },
};
static uint8_t oaes_gf_mul_b[16][16] = {
// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f,
/*0*/ { 0x00, 0x0b, 0x16, 0x1d, 0x2c, 0x27, 0x3a, 0x31, 0x58, 0x53, 0x4e, 0x45, 0x74, 0x7f, 0x62, 0x69 },
/*1*/ { 0xb0, 0xbb, 0xa6, 0xad, 0x9c, 0x97, 0x8a, 0x81, 0xe8, 0xe3, 0xfe, 0xf5, 0xc4, 0xcf, 0xd2, 0xd9 },
/*2*/ { 0x7b, 0x70, 0x6d, 0x66, 0x57, 0x5c, 0x41, 0x4a, 0x23, 0x28, 0x35, 0x3e, 0x0f, 0x04, 0x19, 0x12 },
/*3*/ { 0xcb, 0xc0, 0xdd, 0xd6, 0xe7, 0xec, 0xf1, 0xfa, 0x93, 0x98, 0x85, 0x8e, 0xbf, 0xb4, 0xa9, 0xa2 },
/*4*/ { 0xf6, 0xfd, 0xe0, 0xeb, 0xda, 0xd1, 0xcc, 0xc7, 0xae, 0xa5, 0xb8, 0xb3, 0x82, 0x89, 0x94, 0x9f },
/*5*/ { 0x46, 0x4d, 0x50, 0x5b, 0x6a, 0x61, 0x7c, 0x77, 0x1e, 0x15, 0x08, 0x03, 0x32, 0x39, 0x24, 0x2f },
/*6*/ { 0x8d, 0x86, 0x9b, 0x90, 0xa1, 0xaa, 0xb7, 0xbc, 0xd5, 0xde, 0xc3, 0xc8, 0xf9, 0xf2, 0xef, 0xe4 },
/*7*/ { 0x3d, 0x36, 0x2b, 0x20, 0x11, 0x1a, 0x07, 0x0c, 0x65, 0x6e, 0x73, 0x78, 0x49, 0x42, 0x5f, 0x54 },
/*8*/ { 0xf7, 0xfc, 0xe1, 0xea, 0xdb, 0xd0, 0xcd, 0xc6, 0xaf, 0xa4, 0xb9, 0xb2, 0x83, 0x88, 0x95, 0x9e },
/*9*/ { 0x47, 0x4c, 0x51, 0x5a, 0x6b, 0x60, 0x7d, 0x76, 0x1f, 0x14, 0x09, 0x02, 0x33, 0x38, 0x25, 0x2e },
/*a*/ { 0x8c, 0x87, 0x9a, 0x91, 0xa0, 0xab, 0xb6, 0xbd, 0xd4, 0xdf, 0xc2, 0xc9, 0xf8, 0xf3, 0xee, 0xe5 },
/*b*/ { 0x3c, 0x37, 0x2a, 0x21, 0x10, 0x1b, 0x06, 0x0d, 0x64, 0x6f, 0x72, 0x79, 0x48, 0x43, 0x5e, 0x55 },
/*c*/ { 0x01, 0x0a, 0x17, 0x1c, 0x2d, 0x26, 0x3b, 0x30, 0x59, 0x52, 0x4f, 0x44, 0x75, 0x7e, 0x63, 0x68 },
/*d*/ { 0xb1, 0xba, 0xa7, 0xac, 0x9d, 0x96, 0x8b, 0x80, 0xe9, 0xe2, 0xff, 0xf4, 0xc5, 0xce, 0xd3, 0xd8 },
/*e*/ { 0x7a, 0x71, 0x6c, 0x67, 0x56, 0x5d, 0x40, 0x4b, 0x22, 0x29, 0x34, 0x3f, 0x0e, 0x05, 0x18, 0x13 },
/*f*/ { 0xca, 0xc1, 0xdc, 0xd7, 0xe6, 0xed, 0xf0, 0xfb, 0x92, 0x99, 0x84, 0x8f, 0xbe, 0xb5, 0xa8, 0xa3 },
};
static uint8_t oaes_gf_mul_d[16][16] = {
// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f,
/*0*/ { 0x00, 0x0d, 0x1a, 0x17, 0x34, 0x39, 0x2e, 0x23, 0x68, 0x65, 0x72, 0x7f, 0x5c, 0x51, 0x46, 0x4b },
/*1*/ { 0xd0, 0xdd, 0xca, 0xc7, 0xe4, 0xe9, 0xfe, 0xf3, 0xb8, 0xb5, 0xa2, 0xaf, 0x8c, 0x81, 0x96, 0x9b },
/*2*/ { 0xbb, 0xb6, 0xa1, 0xac, 0x8f, 0x82, 0x95, 0x98, 0xd3, 0xde, 0xc9, 0xc4, 0xe7, 0xea, 0xfd, 0xf0 },
/*3*/ { 0x6b, 0x66, 0x71, 0x7c, 0x5f, 0x52, 0x45, 0x48, 0x03, 0x0e, 0x19, 0x14, 0x37, 0x3a, 0x2d, 0x20 },
/*4*/ { 0x6d, 0x60, 0x77, 0x7a, 0x59, 0x54, 0x43, 0x4e, 0x05, 0x08, 0x1f, 0x12, 0x31, 0x3c, 0x2b, 0x26 },
/*5*/ { 0xbd, 0xb0, 0xa7, 0xaa, 0x89, 0x84, 0x93, 0x9e, 0xd5, 0xd8, 0xcf, 0xc2, 0xe1, 0xec, 0xfb, 0xf6 },
/*6*/ { 0xd6, 0xdb, 0xcc, 0xc1, 0xe2, 0xef, 0xf8, 0xf5, 0xbe, 0xb3, 0xa4, 0xa9, 0x8a, 0x87, 0x90, 0x9d },
/*7*/ { 0x06, 0x0b, 0x1c, 0x11, 0x32, 0x3f, 0x28, 0x25, 0x6e, 0x63, 0x74, 0x79, 0x5a, 0x57, 0x40, 0x4d },
/*8*/ { 0xda, 0xd7, 0xc0, 0xcd, 0xee, 0xe3, 0xf4, 0xf9, 0xb2, 0xbf, 0xa8, 0xa5, 0x86, 0x8b, 0x9c, 0x91 },
/*9*/ { 0x0a, 0x07, 0x10, 0x1d, 0x3e, 0x33, 0x24, 0x29, 0x62, 0x6f, 0x78, 0x75, 0x56, 0x5b, 0x4c, 0x41 },
/*a*/ { 0x61, 0x6c, 0x7b, 0x76, 0x55, 0x58, 0x4f, 0x42, 0x09, 0x04, 0x13, 0x1e, 0x3d, 0x30, 0x27, 0x2a },
/*b*/ { 0xb1, 0xbc, 0xab, 0xa6, 0x85, 0x88, 0x9f, 0x92, 0xd9, 0xd4, 0xc3, 0xce, 0xed, 0xe0, 0xf7, 0xfa },
/*c*/ { 0xb7, 0xba, 0xad, 0xa0, 0x83, 0x8e, 0x99, 0x94, 0xdf, 0xd2, 0xc5, 0xc8, 0xeb, 0xe6, 0xf1, 0xfc },
/*d*/ { 0x67, 0x6a, 0x7d, 0x70, 0x53, 0x5e, 0x49, 0x44, 0x0f, 0x02, 0x15, 0x18, 0x3b, 0x36, 0x21, 0x2c },
/*e*/ { 0x0c, 0x01, 0x16, 0x1b, 0x38, 0x35, 0x22, 0x2f, 0x64, 0x69, 0x7e, 0x73, 0x50, 0x5d, 0x4a, 0x47 },
/*f*/ { 0xdc, 0xd1, 0xc6, 0xcb, 0xe8, 0xe5, 0xf2, 0xff, 0xb4, 0xb9, 0xae, 0xa3, 0x80, 0x8d, 0x9a, 0x97 },
};
static uint8_t oaes_gf_mul_e[16][16] = {
// 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f,
/*0*/ { 0x00, 0x0e, 0x1c, 0x12, 0x38, 0x36, 0x24, 0x2a, 0x70, 0x7e, 0x6c, 0x62, 0x48, 0x46, 0x54, 0x5a },
/*1*/ { 0xe0, 0xee, 0xfc, 0xf2, 0xd8, 0xd6, 0xc4, 0xca, 0x90, 0x9e, 0x8c, 0x82, 0xa8, 0xa6, 0xb4, 0xba },
/*2*/ { 0xdb, 0xd5, 0xc7, 0xc9, 0xe3, 0xed, 0xff, 0xf1, 0xab, 0xa5, 0xb7, 0xb9, 0x93, 0x9d, 0x8f, 0x81 },
/*3*/ { 0x3b, 0x35, 0x27, 0x29, 0x03, 0x0d, 0x1f, 0x11, 0x4b, 0x45, 0x57, 0x59, 0x73, 0x7d, 0x6f, 0x61 },
/*4*/ { 0xad, 0xa3, 0xb1, 0xbf, 0x95, 0x9b, 0x89, 0x87, 0xdd, 0xd3, 0xc1, 0xcf, 0xe5, 0xeb, 0xf9, 0xf7 },
/*5*/ { 0x4d, 0x43, 0x51, 0x5f, 0x75, 0x7b, 0x69, 0x67, 0x3d, 0x33, 0x21, 0x2f, 0x05, 0x0b, 0x19, 0x17 },
/*6*/ { 0x76, 0x78, 0x6a, 0x64, 0x4e, 0x40, 0x52, 0x5c, 0x06, 0x08, 0x1a, 0x14, 0x3e, 0x30, 0x22, 0x2c },
/*7*/ { 0x96, 0x98, 0x8a, 0x84, 0xae, 0xa0, 0xb2, 0xbc, 0xe6, 0xe8, 0xfa, 0xf4, 0xde, 0xd0, 0xc2, 0xcc },
/*8*/ { 0x41, 0x4f, 0x5d, 0x53, 0x79, 0x77, 0x65, 0x6b, 0x31, 0x3f, 0x2d, 0x23, 0x09, 0x07, 0x15, 0x1b },
/*9*/ { 0xa1, 0xaf, 0xbd, 0xb3, 0x99, 0x97, 0x85, 0x8b, 0xd1, 0xdf, 0xcd, 0xc3, 0xe9, 0xe7, 0xf5, 0xfb },
/*a*/ { 0x9a, 0x94, 0x86, 0x88, 0xa2, 0xac, 0xbe, 0xb0, 0xea, 0xe4, 0xf6, 0xf8, 0xd2, 0xdc, 0xce, 0xc0 },
/*b*/ { 0x7a, 0x74, 0x66, 0x68, 0x42, 0x4c, 0x5e, 0x50, 0x0a, 0x04, 0x16, 0x18, 0x32, 0x3c, 0x2e, 0x20 },
/*c*/ { 0xec, 0xe2, 0xf0, 0xfe, 0xd4, 0xda, 0xc8, 0xc6, 0x9c, 0x92, 0x80, 0x8e, 0xa4, 0xaa, 0xb8, 0xb6 },
/*d*/ { 0x0c, 0x02, 0x10, 0x1e, 0x34, 0x3a, 0x28, 0x26, 0x7c, 0x72, 0x60, 0x6e, 0x44, 0x4a, 0x58, 0x56 },
/*e*/ { 0x37, 0x39, 0x2b, 0x25, 0x0f, 0x01, 0x13, 0x1d, 0x47, 0x49, 0x5b, 0x55, 0x7f, 0x71, 0x63, 0x6d },
/*f*/ { 0xd7, 0xd9, 0xcb, 0xc5, 0xef, 0xe1, 0xf3, 0xfd, 0xa7, 0xa9, 0xbb, 0xb5, 0x9f, 0x91, 0x83, 0x8d },
};
static OAES_RET oaes_sub_byte( uint8_t * byte )
{
size_t _x, _y;
if( NULL == byte )
return OAES_RET_ARG1;
_x = _y = *byte;
_x &= 0x0f;
_y &= 0xf0;
_y >>= 4;
*byte = oaes_sub_byte_value[_y][_x];
return OAES_RET_SUCCESS;
}
static OAES_RET oaes_inv_sub_byte( uint8_t * byte )
{
size_t _x, _y;
if( NULL == byte )
return OAES_RET_ARG1;
_x = _y = *byte;
_x &= 0x0f;
_y &= 0xf0;
_y >>= 4;
*byte = oaes_inv_sub_byte_value[_y][_x];
return OAES_RET_SUCCESS;
}
/*
static OAES_RET oaes_word_rot_right( uint8_t word[OAES_COL_LEN] )
{
uint8_t _temp[OAES_COL_LEN];
if( NULL == word )
return OAES_RET_ARG1;
memcpy( _temp + 1, word, OAES_COL_LEN - 1 );
_temp[0] = word[OAES_COL_LEN - 1];
memcpy( word, _temp, OAES_COL_LEN );
return OAES_RET_SUCCESS;
}
*/
static OAES_RET oaes_word_rot_left( uint8_t word[OAES_COL_LEN] )
{
uint8_t _temp[OAES_COL_LEN];
if( NULL == word )
return OAES_RET_ARG1;
memcpy( _temp, word + 1, OAES_COL_LEN - 1 );
_temp[OAES_COL_LEN - 1] = word[0];
memcpy( word, _temp, OAES_COL_LEN );
return OAES_RET_SUCCESS;
}
static OAES_RET oaes_shift_rows( uint8_t block[OAES_BLOCK_SIZE] )
{
uint8_t _temp[OAES_BLOCK_SIZE];
if( NULL == block )
return OAES_RET_ARG1;
_temp[0x00] = block[0x00];
_temp[0x01] = block[0x05];
_temp[0x02] = block[0x0a];
_temp[0x03] = block[0x0f];
_temp[0x04] = block[0x04];
_temp[0x05] = block[0x09];
_temp[0x06] = block[0x0e];
_temp[0x07] = block[0x03];
_temp[0x08] = block[0x08];
_temp[0x09] = block[0x0d];
_temp[0x0a] = block[0x02];
_temp[0x0b] = block[0x07];
_temp[0x0c] = block[0x0c];
_temp[0x0d] = block[0x01];
_temp[0x0e] = block[0x06];
_temp[0x0f] = block[0x0b];
memcpy( block, _temp, OAES_BLOCK_SIZE );
return OAES_RET_SUCCESS;
}
static OAES_RET oaes_inv_shift_rows( uint8_t block[OAES_BLOCK_SIZE] )
{
uint8_t _temp[OAES_BLOCK_SIZE];
if( NULL == block )
return OAES_RET_ARG1;
_temp[0x00] = block[0x00];
_temp[0x01] = block[0x0d];
_temp[0x02] = block[0x0a];
_temp[0x03] = block[0x07];
_temp[0x04] = block[0x04];
_temp[0x05] = block[0x01];
_temp[0x06] = block[0x0e];
_temp[0x07] = block[0x0b];
_temp[0x08] = block[0x08];
_temp[0x09] = block[0x05];
_temp[0x0a] = block[0x02];
_temp[0x0b] = block[0x0f];
_temp[0x0c] = block[0x0c];
_temp[0x0d] = block[0x09];
_temp[0x0e] = block[0x06];
_temp[0x0f] = block[0x03];
memcpy( block, _temp, OAES_BLOCK_SIZE );
return OAES_RET_SUCCESS;
}
static uint8_t oaes_gf_mul(uint8_t left, uint8_t right)
{
size_t _x, _y;
_x = _y = left;
_x &= 0x0f;
_y &= 0xf0;
_y >>= 4;
switch( right )
{
case 0x02:
return oaes_gf_mul_2[_y][_x];
break;
case 0x03:
return oaes_gf_mul_3[_y][_x];
break;
case 0x09:
return oaes_gf_mul_9[_y][_x];
break;
case 0x0b:
return oaes_gf_mul_b[_y][_x];
break;
case 0x0d:
return oaes_gf_mul_d[_y][_x];
break;
case 0x0e:
return oaes_gf_mul_e[_y][_x];
break;
default:
return left;
break;
}
}
static OAES_RET oaes_mix_cols( uint8_t word[OAES_COL_LEN] )
{
uint8_t _temp[OAES_COL_LEN];
if( NULL == word )
return OAES_RET_ARG1;
_temp[0] = oaes_gf_mul(word[0], 0x02) ^ oaes_gf_mul( word[1], 0x03 ) ^
word[2] ^ word[3];
_temp[1] = word[0] ^ oaes_gf_mul( word[1], 0x02 ) ^
oaes_gf_mul( word[2], 0x03 ) ^ word[3];
_temp[2] = word[0] ^ word[1] ^
oaes_gf_mul( word[2], 0x02 ) ^ oaes_gf_mul( word[3], 0x03 );
_temp[3] = oaes_gf_mul( word[0], 0x03 ) ^ word[1] ^
word[2] ^ oaes_gf_mul( word[3], 0x02 );
memcpy( word, _temp, OAES_COL_LEN );
return OAES_RET_SUCCESS;
}
static OAES_RET oaes_inv_mix_cols( uint8_t word[OAES_COL_LEN] )
{
uint8_t _temp[OAES_COL_LEN];
if( NULL == word )
return OAES_RET_ARG1;
_temp[0] = oaes_gf_mul( word[0], 0x0e ) ^ oaes_gf_mul( word[1], 0x0b ) ^
oaes_gf_mul( word[2], 0x0d ) ^ oaes_gf_mul( word[3], 0x09 );
_temp[1] = oaes_gf_mul( word[0], 0x09 ) ^ oaes_gf_mul( word[1], 0x0e ) ^
oaes_gf_mul( word[2], 0x0b ) ^ oaes_gf_mul( word[3], 0x0d );
_temp[2] = oaes_gf_mul( word[0], 0x0d ) ^ oaes_gf_mul( word[1], 0x09 ) ^
oaes_gf_mul( word[2], 0x0e ) ^ oaes_gf_mul( word[3], 0x0b );
_temp[3] = oaes_gf_mul( word[0], 0x0b ) ^ oaes_gf_mul( word[1], 0x0d ) ^
oaes_gf_mul( word[2], 0x09 ) ^ oaes_gf_mul( word[3], 0x0e );
memcpy( word, _temp, OAES_COL_LEN );
return OAES_RET_SUCCESS;
}
OAES_RET oaes_sprintf(
char * buf, size_t * buf_len, const uint8_t * data, size_t data_len )
{
size_t _i, _buf_len_in;
char _temp[4];
if( NULL == buf_len )
return OAES_RET_ARG2;
_buf_len_in = *buf_len;
*buf_len = data_len * 3 + data_len / OAES_BLOCK_SIZE + 1;
if( NULL == buf )
return OAES_RET_SUCCESS;
if( *buf_len > _buf_len_in )
return OAES_RET_BUF;
if( NULL == data )
return OAES_RET_ARG3;
strcpy( buf, "" );
for( _i = 0; _i < data_len; _i++ )
{
sprintf( _temp, "%02x ", data[_i] );
strcat( buf, _temp );
if( _i && 0 == ( _i + 1 ) % OAES_BLOCK_SIZE )
strcat( buf, "\n" );
}
return OAES_RET_SUCCESS;
}
#ifdef OAES_HAVE_ISAAC
static void oaes_get_seed( char buf[RANDSIZ + 1] )
{
struct timeb timer;
struct tm *gmTimer;
char * _test = NULL;
ftime (&timer);
gmTimer = gmtime( &timer.time );
_test = (char *) calloc( sizeof( char ), timer.millitm );
sprintf( buf, "%04d%02d%02d%02d%02d%02d%03d%p%d",
gmTimer->tm_year + 1900, gmTimer->tm_mon + 1, gmTimer->tm_mday,
gmTimer->tm_hour, gmTimer->tm_min, gmTimer->tm_sec, timer.millitm,
_test + timer.millitm, getpid() );
if( _test )
free( _test );
}
#else
static uint32_t oaes_get_seed(void)
{
struct timeb timer;
struct tm *gmTimer;
char * _test = NULL;
uint32_t _ret = 0;
ftime (&timer);
gmTimer = gmtime( &timer.time );
_test = (char *) calloc( sizeof( char ), timer.millitm );
_ret = gmTimer->tm_year + 1900 + gmTimer->tm_mon + 1 + gmTimer->tm_mday +
gmTimer->tm_hour + gmTimer->tm_min + gmTimer->tm_sec + timer.millitm +
(uintptr_t) ( _test + timer.millitm ) + getpid();
if( _test )
free( _test );
return _ret;
}
#endif // OAES_HAVE_ISAAC
static OAES_RET oaes_key_destroy( oaes_key ** key )
{
if( NULL == *key )
return OAES_RET_SUCCESS;
if( (*key)->data )
{
free( (*key)->data );
(*key)->data = NULL;
}
if( (*key)->exp_data )
{
free( (*key)->exp_data );
(*key)->exp_data = NULL;
}
(*key)->data_len = 0;
(*key)->exp_data_len = 0;
(*key)->num_keys = 0;
(*key)->key_base = 0;
free( *key );
*key = NULL;
return OAES_RET_SUCCESS;
}
static OAES_RET oaes_key_expand( OAES_CTX * ctx )
{
size_t _i, _j;
oaes_ctx * _ctx = (oaes_ctx *) ctx;
if( NULL == _ctx )
return OAES_RET_ARG1;
if( NULL == _ctx->key )
return OAES_RET_NOKEY;
_ctx->key->key_base = _ctx->key->data_len / OAES_RKEY_LEN;
_ctx->key->num_keys = _ctx->key->key_base + OAES_ROUND_BASE;
_ctx->key->exp_data_len = _ctx->key->num_keys * OAES_RKEY_LEN * OAES_COL_LEN;
_ctx->key->exp_data = (uint8_t *)
calloc( _ctx->key->exp_data_len, sizeof( uint8_t ));
if( NULL == _ctx->key->exp_data )
return OAES_RET_MEM;
// the first _ctx->key->data_len are a direct copy
memcpy( _ctx->key->exp_data, _ctx->key->data, _ctx->key->data_len );
// apply ExpandKey algorithm for remainder
for( _i = _ctx->key->key_base; _i < _ctx->key->num_keys * OAES_RKEY_LEN; _i++ )
{
uint8_t _temp[OAES_COL_LEN];
memcpy( _temp,
_ctx->key->exp_data + ( _i - 1 ) * OAES_RKEY_LEN, OAES_COL_LEN );
// transform key column
if( 0 == _i % _ctx->key->key_base )
{
oaes_word_rot_left( _temp );
for( _j = 0; _j < OAES_COL_LEN; _j++ )
oaes_sub_byte( _temp + _j );
_temp[0] = _temp[0] ^ oaes_gf_8[ _i / _ctx->key->key_base - 1 ];
}
else if( _ctx->key->key_base > 6 && 4 == _i % _ctx->key->key_base )
{
for( _j = 0; _j < OAES_COL_LEN; _j++ )
oaes_sub_byte( _temp + _j );
}
for( _j = 0; _j < OAES_COL_LEN; _j++ )
{
_ctx->key->exp_data[ _i * OAES_RKEY_LEN + _j ] =
_ctx->key->exp_data[ ( _i - _ctx->key->key_base ) *
OAES_RKEY_LEN + _j ] ^ _temp[_j];
}
}
return OAES_RET_SUCCESS;
}
static OAES_RET oaes_key_gen( OAES_CTX * ctx, size_t key_size )
{
size_t _i;
oaes_key * _key = NULL;
oaes_ctx * _ctx = (oaes_ctx *) ctx;
OAES_RET _rc = OAES_RET_SUCCESS;
if( NULL == _ctx )
return OAES_RET_ARG1;
_key = (oaes_key *) calloc( sizeof( oaes_key ), 1 );
if( NULL == _key )
return OAES_RET_MEM;
if( _ctx->key )
oaes_key_destroy( &(_ctx->key) );
_key->data_len = key_size;
_key->data = (uint8_t *) calloc( key_size, sizeof( uint8_t ));
if( NULL == _key->data )
return OAES_RET_MEM;
for( _i = 0; _i < key_size; _i++ )
#ifdef OAES_HAVE_ISAAC
_key->data[_i] = (uint8_t) rand( _ctx->rctx );
#else
_key->data[_i] = (uint8_t) rand();
#endif // OAES_HAVE_ISAAC
_ctx->key = _key;
_rc = _rc || oaes_key_expand( ctx );
if( _rc != OAES_RET_SUCCESS )
{
oaes_key_destroy( &(_ctx->key) );
return _rc;
}
return OAES_RET_SUCCESS;
}
OAES_RET oaes_key_gen_128( OAES_CTX * ctx )
{
return oaes_key_gen( ctx, 16 );
}
OAES_RET oaes_key_gen_192( OAES_CTX * ctx )
{
return oaes_key_gen( ctx, 24 );
}
OAES_RET oaes_key_gen_256( OAES_CTX * ctx )
{
return oaes_key_gen( ctx, 32 );
}
OAES_RET oaes_key_export( OAES_CTX * ctx,
uint8_t * data, size_t * data_len )
{
size_t _data_len_in;
oaes_ctx * _ctx = (oaes_ctx *) ctx;
if( NULL == _ctx )
return OAES_RET_ARG1;
if( NULL == _ctx->key )
return OAES_RET_NOKEY;
if( NULL == data_len )
return OAES_RET_ARG3;
_data_len_in = *data_len;
// data + header
*data_len = _ctx->key->data_len + OAES_BLOCK_SIZE;
if( NULL == data )
return OAES_RET_SUCCESS;
if( _data_len_in < *data_len )
return OAES_RET_BUF;
// header
memcpy( data, oaes_header, OAES_BLOCK_SIZE );
data[5] = 0x01;
data[7] = _ctx->key->data_len;
memcpy( data + OAES_BLOCK_SIZE, _ctx->key->data, _ctx->key->data_len );
return OAES_RET_SUCCESS;
}
OAES_RET oaes_key_export_data( OAES_CTX * ctx,
uint8_t * data, size_t * data_len )
{
size_t _data_len_in;
oaes_ctx * _ctx = (oaes_ctx *) ctx;
if( NULL == _ctx )
return OAES_RET_ARG1;
if( NULL == _ctx->key )
return OAES_RET_NOKEY;
if( NULL == data_len )
return OAES_RET_ARG3;
_data_len_in = *data_len;
*data_len = _ctx->key->data_len;
if( NULL == data )
return OAES_RET_SUCCESS;
if( _data_len_in < *data_len )
return OAES_RET_BUF;
memcpy( data, _ctx->key->data, *data_len );
return OAES_RET_SUCCESS;
}
OAES_RET oaes_key_import( OAES_CTX * ctx,
const uint8_t * data, size_t data_len )
{
oaes_ctx * _ctx = (oaes_ctx *) ctx;
OAES_RET _rc = OAES_RET_SUCCESS;
int _key_length;
if( NULL == _ctx )
return OAES_RET_ARG1;
if( NULL == data )
return OAES_RET_ARG2;
switch( data_len )
{
case 16 + OAES_BLOCK_SIZE:
case 24 + OAES_BLOCK_SIZE:
case 32 + OAES_BLOCK_SIZE:
break;
default:
return OAES_RET_ARG3;
}
// header
if( 0 != memcmp( data, oaes_header, 4 ) )
return OAES_RET_HEADER;
// header version
switch( data[4] )
{
case 0x01:
break;
default:
return OAES_RET_HEADER;
}
// header type
switch( data[5] )
{
case 0x01:
break;
default:
return OAES_RET_HEADER;
}
// options
_key_length = data[7];
switch( _key_length )
{
case 16:
case 24:
case 32:
break;
default:
return OAES_RET_HEADER;
}
if( (int)data_len != _key_length + OAES_BLOCK_SIZE )
return OAES_RET_ARG3;
if( _ctx->key )
oaes_key_destroy( &(_ctx->key) );
_ctx->key = (oaes_key *) calloc( sizeof( oaes_key ), 1 );
if( NULL == _ctx->key )
return OAES_RET_MEM;
_ctx->key->data_len = _key_length;
_ctx->key->data = (uint8_t *)
calloc( _key_length, sizeof( uint8_t ));
if( NULL == _ctx->key->data )
{
oaes_key_destroy( &(_ctx->key) );
return OAES_RET_MEM;
}
memcpy( _ctx->key->data, data + OAES_BLOCK_SIZE, _key_length );
_rc = _rc || oaes_key_expand( ctx );
if( _rc != OAES_RET_SUCCESS )
{
oaes_key_destroy( &(_ctx->key) );
return _rc;
}
return OAES_RET_SUCCESS;
}
OAES_RET oaes_key_import_data( OAES_CTX * ctx,
const uint8_t * data, size_t data_len )
{
oaes_ctx * _ctx = (oaes_ctx *) ctx;
OAES_RET _rc = OAES_RET_SUCCESS;
if( NULL == _ctx )
return OAES_RET_ARG1;
if( NULL == data )
return OAES_RET_ARG2;
switch( data_len )
{
case 16:
case 24:
case 32:
break;
default:
return OAES_RET_ARG3;
}
if( _ctx->key )
oaes_key_destroy( &(_ctx->key) );
_ctx->key = (oaes_key *) calloc( sizeof( oaes_key ), 1 );
if( NULL == _ctx->key )
return OAES_RET_MEM;
_ctx->key->data_len = data_len;
_ctx->key->data = (uint8_t *)
calloc( data_len, sizeof( uint8_t ));
if( NULL == _ctx->key->data )
{
oaes_key_destroy( &(_ctx->key) );
return OAES_RET_MEM;
}
memcpy( _ctx->key->data, data, data_len );
_rc = _rc || oaes_key_expand( ctx );
if( _rc != OAES_RET_SUCCESS )
{
oaes_key_destroy( &(_ctx->key) );
return _rc;
}
return OAES_RET_SUCCESS;
}
OAES_CTX * oaes_alloc(void)
{
oaes_ctx * _ctx = (oaes_ctx *) calloc( sizeof( oaes_ctx ), 1 );
if( NULL == _ctx )
return NULL;
#ifdef OAES_HAVE_ISAAC
{
ub4 _i = 0;
char _seed[RANDSIZ + 1];
_ctx->rctx = (randctx *) calloc( sizeof( randctx ), 1 );
if( NULL == _ctx->rctx )
{
free( _ctx );
return NULL;
}
oaes_get_seed( _seed );
memset( _ctx->rctx->randrsl, 0, RANDSIZ );
memcpy( _ctx->rctx->randrsl, _seed, RANDSIZ );
randinit( _ctx->rctx, TRUE);
}
#else
srand( oaes_get_seed() );
#endif // OAES_HAVE_ISAAC
_ctx->key = NULL;
oaes_set_option( _ctx, OAES_OPTION_CBC, NULL );
#ifdef OAES_DEBUG
_ctx->step_cb = NULL;
oaes_set_option( _ctx, OAES_OPTION_STEP_OFF, NULL );
#endif // OAES_DEBUG
return (OAES_CTX *) _ctx;
}
OAES_RET oaes_free( OAES_CTX ** ctx )
{
oaes_ctx ** _ctx = (oaes_ctx **) ctx;
if( NULL == _ctx )
return OAES_RET_ARG1;
if( NULL == *_ctx )
return OAES_RET_SUCCESS;
if( (*_ctx)->key )
oaes_key_destroy( &((*_ctx)->key) );
#ifdef OAES_HAVE_ISAAC
if( (*_ctx)->rctx )
{
free( (*_ctx)->rctx );
(*_ctx)->rctx = NULL;
}
#endif // OAES_HAVE_ISAAC
free( *_ctx );
*_ctx = NULL;
return OAES_RET_SUCCESS;
}
OAES_RET oaes_set_option( OAES_CTX * ctx,
OAES_OPTION option, const void * value )
{
size_t _i;
oaes_ctx * _ctx = (oaes_ctx *) ctx;
if( NULL == _ctx )
return OAES_RET_ARG1;
switch( option )
{
case OAES_OPTION_ECB:
_ctx->options &= ~OAES_OPTION_CBC;
memset( _ctx->iv, 0, OAES_BLOCK_SIZE );
break;
case OAES_OPTION_CBC:
_ctx->options &= ~OAES_OPTION_ECB;
if( value )
memcpy( _ctx->iv, value, OAES_BLOCK_SIZE );
else
{
for( _i = 0; _i < OAES_BLOCK_SIZE; _i++ )
#ifdef OAES_HAVE_ISAAC
_ctx->iv[_i] = (uint8_t) rand( _ctx->rctx );
#else
_ctx->iv[_i] = (uint8_t) rand();
#endif // OAES_HAVE_ISAAC
}
break;
#ifdef OAES_DEBUG
case OAES_OPTION_STEP_ON:
if( value )
{
_ctx->options &= ~OAES_OPTION_STEP_OFF;
_ctx->step_cb = value;
}
else
{
_ctx->options &= ~OAES_OPTION_STEP_ON;
_ctx->options |= OAES_OPTION_STEP_OFF;
_ctx->step_cb = NULL;
return OAES_RET_ARG3;
}
break;
case OAES_OPTION_STEP_OFF:
_ctx->options &= ~OAES_OPTION_STEP_ON;
_ctx->step_cb = NULL;
break;
#endif // OAES_DEBUG
default:
return OAES_RET_ARG2;
}
_ctx->options |= option;
return OAES_RET_SUCCESS;
}
static OAES_RET oaes_encrypt_block(
OAES_CTX * ctx, uint8_t * c, size_t c_len )
{
size_t _i, _j;
oaes_ctx * _ctx = (oaes_ctx *) ctx;
if( NULL == _ctx )
return OAES_RET_ARG1;
if( NULL == c )
return OAES_RET_ARG2;
if( c_len != OAES_BLOCK_SIZE )
return OAES_RET_ARG3;
if( NULL == _ctx->key )
return OAES_RET_NOKEY;
#ifdef OAES_DEBUG
if( _ctx->step_cb )
_ctx->step_cb( c, "input", 1, NULL );
#endif // OAES_DEBUG
// AddRoundKey(State, K0)
for( _i = 0; _i < c_len; _i++ )
c[_i] = c[_i] ^ _ctx->key->exp_data[_i];
#ifdef OAES_DEBUG
if( _ctx->step_cb )
{
_ctx->step_cb( _ctx->key->exp_data, "k_sch", 1, NULL );
_ctx->step_cb( c, "k_add", 1, NULL );
}
#endif // OAES_DEBUG
// for round = 1 step 1 to Nr–1
for( _i = 1; _i < _ctx->key->num_keys - 1; _i++ )
{
// SubBytes(state)
for( _j = 0; _j < c_len; _j++ )
oaes_sub_byte( c + _j );
#ifdef OAES_DEBUG
if( _ctx->step_cb )
_ctx->step_cb( c, "s_box", _i, NULL );
#endif // OAES_DEBUG
// ShiftRows(state)
oaes_shift_rows( c );
#ifdef OAES_DEBUG
if( _ctx->step_cb )
_ctx->step_cb( c, "s_row", _i, NULL );
#endif // OAES_DEBUG
// MixColumns(state)
oaes_mix_cols( c );
oaes_mix_cols( c + 4 );
oaes_mix_cols( c + 8 );
oaes_mix_cols( c + 12 );
#ifdef OAES_DEBUG
if( _ctx->step_cb )
_ctx->step_cb( c, "m_col", _i, NULL );
#endif // OAES_DEBUG
// AddRoundKey(state, w[round*Nb, (round+1)*Nb-1])
for( _j = 0; _j < c_len; _j++ )
c[_j] = c[_j] ^
_ctx->key->exp_data[_i * OAES_RKEY_LEN * OAES_COL_LEN + _j];
#ifdef OAES_DEBUG
if( _ctx->step_cb )
{
_ctx->step_cb( _ctx->key->exp_data + _i * OAES_RKEY_LEN * OAES_COL_LEN,
"k_sch", _i, NULL );
_ctx->step_cb( c, "k_add", _i, NULL );
}
#endif // OAES_DEBUG
}
// SubBytes(state)
for( _i = 0; _i < c_len; _i++ )
oaes_sub_byte( c + _i );
#ifdef OAES_DEBUG
if( _ctx->step_cb )
_ctx->step_cb( c, "s_box", _ctx->key->num_keys - 1, NULL );
#endif // OAES_DEBUG
// ShiftRows(state)
oaes_shift_rows( c );
#ifdef OAES_DEBUG
if( _ctx->step_cb )
_ctx->step_cb( c, "s_row", _ctx->key->num_keys - 1, NULL );
#endif // OAES_DEBUG
// AddRoundKey(state, w[Nr*Nb, (Nr+1)*Nb-1])
for( _i = 0; _i < c_len; _i++ )
c[_i] = c[_i] ^ _ctx->key->exp_data[
( _ctx->key->num_keys - 1 ) * OAES_RKEY_LEN * OAES_COL_LEN + _i ];
#ifdef OAES_DEBUG
if( _ctx->step_cb )
{
_ctx->step_cb( _ctx->key->exp_data +
( _ctx->key->num_keys - 1 ) * OAES_RKEY_LEN * OAES_COL_LEN,
"k_sch", _ctx->key->num_keys - 1, NULL );
_ctx->step_cb( c, "output", _ctx->key->num_keys - 1, NULL );
}
#endif // OAES_DEBUG
return OAES_RET_SUCCESS;
}
static OAES_RET oaes_decrypt_block(
OAES_CTX * ctx, uint8_t * c, size_t c_len )
{
size_t _i, _j;
oaes_ctx * _ctx = (oaes_ctx *) ctx;
if( NULL == _ctx )
return OAES_RET_ARG1;
if( NULL == c )
return OAES_RET_ARG2;
if( c_len != OAES_BLOCK_SIZE )
return OAES_RET_ARG3;
if( NULL == _ctx->key )
return OAES_RET_NOKEY;
#ifdef OAES_DEBUG
if( _ctx->step_cb )
_ctx->step_cb( c, "iinput", _ctx->key->num_keys - 1, NULL );
#endif // OAES_DEBUG
// AddRoundKey(state, w[Nr*Nb, (Nr+1)*Nb-1])
for( _i = 0; _i < c_len; _i++ )
c[_i] = c[_i] ^ _ctx->key->exp_data[
( _ctx->key->num_keys - 1 ) * OAES_RKEY_LEN * OAES_COL_LEN + _i ];
#ifdef OAES_DEBUG
if( _ctx->step_cb )
{
_ctx->step_cb( _ctx->key->exp_data +
( _ctx->key->num_keys - 1 ) * OAES_RKEY_LEN * OAES_COL_LEN,
"ik_sch", _ctx->key->num_keys - 1, NULL );
_ctx->step_cb( c, "ik_add", _ctx->key->num_keys - 1, NULL );
}
#endif // OAES_DEBUG
for( _i = _ctx->key->num_keys - 2; _i > 0; _i-- )
{
// InvShiftRows(state)
oaes_inv_shift_rows( c );
#ifdef OAES_DEBUG
if( _ctx->step_cb )
_ctx->step_cb( c, "is_row", _i, NULL );
#endif // OAES_DEBUG
// InvSubBytes(state)
for( _j = 0; _j < c_len; _j++ )
oaes_inv_sub_byte( c + _j );
#ifdef OAES_DEBUG
if( _ctx->step_cb )
_ctx->step_cb( c, "is_box", _i, NULL );
#endif // OAES_DEBUG
// AddRoundKey(state, w[round*Nb, (round+1)*Nb-1])
for( _j = 0; _j < c_len; _j++ )
c[_j] = c[_j] ^
_ctx->key->exp_data[_i * OAES_RKEY_LEN * OAES_COL_LEN + _j];
#ifdef OAES_DEBUG
if( _ctx->step_cb )
{
_ctx->step_cb( _ctx->key->exp_data + _i * OAES_RKEY_LEN * OAES_COL_LEN,
"ik_sch", _i, NULL );
_ctx->step_cb( c, "ik_add", _i, NULL );
}
#endif // OAES_DEBUG
// InvMixColums(state)
oaes_inv_mix_cols( c );
oaes_inv_mix_cols( c + 4 );
oaes_inv_mix_cols( c + 8 );
oaes_inv_mix_cols( c + 12 );
#ifdef OAES_DEBUG
if( _ctx->step_cb )
_ctx->step_cb( c, "im_col", _i, NULL );
#endif // OAES_DEBUG
}
// InvShiftRows(state)
oaes_inv_shift_rows( c );
#ifdef OAES_DEBUG
if( _ctx->step_cb )
_ctx->step_cb( c, "is_row", 1, NULL );
#endif // OAES_DEBUG
// InvSubBytes(state)
for( _i = 0; _i < c_len; _i++ )
oaes_inv_sub_byte( c + _i );
#ifdef OAES_DEBUG
if( _ctx->step_cb )
_ctx->step_cb( c, "is_box", 1, NULL );
#endif // OAES_DEBUG
// AddRoundKey(state, w[0, Nb-1])
for( _i = 0; _i < c_len; _i++ )
c[_i] = c[_i] ^ _ctx->key->exp_data[_i];
#ifdef OAES_DEBUG
if( _ctx->step_cb )
{
_ctx->step_cb( _ctx->key->exp_data, "ik_sch", 1, NULL );
_ctx->step_cb( c, "ioutput", 1, NULL );
}
#endif // OAES_DEBUG
return OAES_RET_SUCCESS;
}
OAES_RET oaes_encrypt( OAES_CTX * ctx,
const uint8_t * m, size_t m_len, uint8_t * c, size_t * c_len )
{
size_t _i, _j, _c_len_in, _c_data_len;
size_t _pad_len = m_len % OAES_BLOCK_SIZE == 0 ?
0 : OAES_BLOCK_SIZE - m_len % OAES_BLOCK_SIZE;
oaes_ctx * _ctx = (oaes_ctx *) ctx;
OAES_RET _rc = OAES_RET_SUCCESS;
uint8_t _flags = _pad_len ? OAES_FLAG_PAD : 0;
if( NULL == _ctx )
return OAES_RET_ARG1;
if( NULL == m )
return OAES_RET_ARG2;
if( NULL == c_len )
return OAES_RET_ARG5;
_c_len_in = *c_len;
// data + pad
_c_data_len = m_len + _pad_len;
// header + iv + data + pad
*c_len = 2 * OAES_BLOCK_SIZE + m_len + _pad_len;
if( NULL == c )
return OAES_RET_SUCCESS;
if( _c_len_in < *c_len )
return OAES_RET_BUF;
if( NULL == _ctx->key )
return OAES_RET_NOKEY;
// header
memcpy(c, oaes_header, OAES_BLOCK_SIZE );
memcpy(c + 6, &_ctx->options, sizeof(_ctx->options));
memcpy(c + 8, &_flags, sizeof(_flags));
// iv
memcpy(c + OAES_BLOCK_SIZE, _ctx->iv, OAES_BLOCK_SIZE );
// data
memcpy(c + 2 * OAES_BLOCK_SIZE, m, m_len );
for( _i = 0; _i < _c_data_len; _i += OAES_BLOCK_SIZE )
{
uint8_t _block[OAES_BLOCK_SIZE];
size_t _block_size = min( m_len - _i, OAES_BLOCK_SIZE );
memcpy( _block, c + 2 * OAES_BLOCK_SIZE + _i, _block_size );
// insert pad
for( _j = 0; _j < OAES_BLOCK_SIZE - _block_size; _j++ )
_block[ _block_size + _j ] = _j + 1;
// CBC
if( _ctx->options & OAES_OPTION_CBC )
{
for( _j = 0; _j < OAES_BLOCK_SIZE; _j++ )
_block[_j] = _block[_j] ^ _ctx->iv[_j];
}
_rc = _rc ||
oaes_encrypt_block( ctx, _block, OAES_BLOCK_SIZE );
memcpy( c + 2 * OAES_BLOCK_SIZE + _i, _block, OAES_BLOCK_SIZE );
if( _ctx->options & OAES_OPTION_CBC )
memcpy( _ctx->iv, _block, OAES_BLOCK_SIZE );
}
return _rc;
}
OAES_RET oaes_decrypt( OAES_CTX * ctx,
const uint8_t * c, size_t c_len, uint8_t * m, size_t * m_len )
{
size_t _i, _j, _m_len_in;
oaes_ctx * _ctx = (oaes_ctx *) ctx;
OAES_RET _rc = OAES_RET_SUCCESS;
uint8_t _iv[OAES_BLOCK_SIZE];
uint8_t _flags;
OAES_OPTION _options;
if( NULL == ctx )
return OAES_RET_ARG1;
if( NULL == c )
return OAES_RET_ARG2;
if( c_len % OAES_BLOCK_SIZE )
return OAES_RET_ARG3;
if( NULL == m_len )
return OAES_RET_ARG5;
_m_len_in = *m_len;
*m_len = c_len - 2 * OAES_BLOCK_SIZE;
if( NULL == m )
return OAES_RET_SUCCESS;
if( _m_len_in < *m_len )
return OAES_RET_BUF;
if( NULL == _ctx->key )
return OAES_RET_NOKEY;
// header
if( 0 != memcmp( c, oaes_header, 4 ) )
return OAES_RET_HEADER;
// header version
switch( c[4] )
{
case 0x01:
break;
default:
return OAES_RET_HEADER;
}
// header type
switch( c[5] )
{
case 0x02:
break;
default:
return OAES_RET_HEADER;
}
// options
memcpy(&_options, c + 6, sizeof(_options));
// validate that all options are valid
if( _options & ~(
OAES_OPTION_ECB
| OAES_OPTION_CBC
#ifdef OAES_DEBUG
| OAES_OPTION_STEP_ON
| OAES_OPTION_STEP_OFF
#endif // OAES_DEBUG
) )
return OAES_RET_HEADER;
if( ( _options & OAES_OPTION_ECB ) &&
( _options & OAES_OPTION_CBC ) )
return OAES_RET_HEADER;
if( _options == OAES_OPTION_NONE )
return OAES_RET_HEADER;
// flags
memcpy(&_flags, c + 8, sizeof(_flags));
// validate that all flags are valid
if( _flags & ~(
OAES_FLAG_PAD
) )
return OAES_RET_HEADER;
// iv
memcpy( _iv, c + OAES_BLOCK_SIZE, OAES_BLOCK_SIZE);
// data + pad
memcpy( m, c + 2 * OAES_BLOCK_SIZE, *m_len );
for( _i = 0; _i < *m_len; _i += OAES_BLOCK_SIZE )
{
if( ( _options & OAES_OPTION_CBC ) && _i > 0 )
memcpy( _iv, c + OAES_BLOCK_SIZE + _i, OAES_BLOCK_SIZE );
_rc = _rc ||
oaes_decrypt_block( ctx, m + _i, min( *m_len - _i, OAES_BLOCK_SIZE ) );
// CBC
if( _options & OAES_OPTION_CBC )
{
for( _j = 0; _j < OAES_BLOCK_SIZE; _j++ )
m[ _i + _j ] = m[ _i + _j ] ^ _iv[_j];
}
}
// remove pad
if( _flags & OAES_FLAG_PAD )
{
int _is_pad = 1;
size_t _temp = (size_t) m[*m_len - 1];
if( _temp <= 0x00 || _temp > 0x0f )
return OAES_RET_HEADER;
for( _i = 0; _i < _temp; _i++ )
if( m[*m_len - 1 - _i] != _temp - _i )
_is_pad = 0;
if( _is_pad )
{
memset( m + *m_len - _temp, 0, _temp );
*m_len -= _temp;
}
else
return OAES_RET_HEADER;
}
return OAES_RET_SUCCESS;
}
OAES_API OAES_RET oaes_encryption_round( const uint8_t * key, uint8_t * c )
{
size_t _i;
if( NULL == key )
return OAES_RET_ARG1;
if( NULL == c )
return OAES_RET_ARG2;
// SubBytes(state)
for( _i = 0; _i < OAES_BLOCK_SIZE; _i++ )
oaes_sub_byte( c + _i );
// ShiftRows(state)
oaes_shift_rows( c );
// MixColumns(state)
oaes_mix_cols( c );
oaes_mix_cols( c + 4 );
oaes_mix_cols( c + 8 );
oaes_mix_cols( c + 12 );
// AddRoundKey(State, key)
for( _i = 0; _i < OAES_BLOCK_SIZE; _i++ )
c[_i] ^= key[_i];
return OAES_RET_SUCCESS;
}
OAES_API OAES_RET oaes_pseudo_encrypt_ecb( OAES_CTX * ctx, uint8_t * c )
{
size_t _i;
oaes_ctx * _ctx = (oaes_ctx *) ctx;
if( NULL == _ctx )
return OAES_RET_ARG1;
if( NULL == c )
return OAES_RET_ARG2;
if( NULL == _ctx->key )
return OAES_RET_NOKEY;
for ( _i = 0; _i < 10; ++_i )
{
oaes_encryption_round( &_ctx->key->exp_data[_i * OAES_RKEY_LEN * OAES_COL_LEN], c );
}
return OAES_RET_SUCCESS;
}
Reference in New Issue View Git Blame Copy Permalink