/*
* Copyright (C) 2008 Vincent Hanquez <vincent@snarc.org>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of his contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 AUTHORS 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.
*
* AES implementation
*/
#include <stdint.h>
#include <stdlib.h>
#include <cryptonite_aes.h>
#include <cryptonite_bitfn.h>
static uint8_t sbox[256] = {
0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe,
0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4,
0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7,
0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3,
0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09,
0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3,
0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe,
0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85,
0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92,
0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c,
0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19,
0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14,
0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2,
0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5,
0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25,
0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86,
0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e,
0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42,
0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16
};
static uint8_t rsbox[256] = {
0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81,
0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e,
0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23,
0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66,
0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72,
0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65,
0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46,
0x57, 0xa7, 0x8d, 0x9d, 0x84, 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a,
0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca,
0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91,
0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6,
0x73, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8,
0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f,
0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2,
0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 0x1f, 0xdd, 0xa8,
0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93,
0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb,
0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6,
0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d
};
static uint8_t Rcon[] = {
0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8,
0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3,
0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f,
0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb,
};
#define G(a,b,c,d,e,f) { a,b,c,d,e,f }
static uint8_t gmtab[256][6] =
{
G(0x00, 0x00, 0x00, 0x00, 0x00, 0x00), G(0x02, 0x03, 0x09, 0x0b, 0x0d, 0x0e),
G(0x04, 0x06, 0x12, 0x16, 0x1a, 0x1c), G(0x06, 0x05, 0x1b, 0x1d, 0x17, 0x12),
G(0x08, 0x0c, 0x24, 0x2c, 0x34, 0x38), G(0x0a, 0x0f, 0x2d, 0x27, 0x39, 0x36),
G(0x0c, 0x0a, 0x36, 0x3a, 0x2e, 0x24), G(0x0e, 0x09, 0x3f, 0x31, 0x23, 0x2a),
G(0x10, 0x18, 0x48, 0x58, 0x68, 0x70), G(0x12, 0x1b, 0x41, 0x53, 0x65, 0x7e),
G(0x14, 0x1e, 0x5a, 0x4e, 0x72, 0x6c), G(0x16, 0x1d, 0x53, 0x45, 0x7f, 0x62),
G(0x18, 0x14, 0x6c, 0x74, 0x5c, 0x48), G(0x1a, 0x17, 0x65, 0x7f, 0x51, 0x46),
G(0x1c, 0x12, 0x7e, 0x62, 0x46, 0x54), G(0x1e, 0x11, 0x77, 0x69, 0x4b, 0x5a),
G(0x20, 0x30, 0x90, 0xb0, 0xd0, 0xe0), G(0x22, 0x33, 0x99, 0xbb, 0xdd, 0xee),
G(0x24, 0x36, 0x82, 0xa6, 0xca, 0xfc), G(0x26, 0x35, 0x8b, 0xad, 0xc7, 0xf2),
G(0x28, 0x3c, 0xb4, 0x9c, 0xe4, 0xd8), G(0x2a, 0x3f, 0xbd, 0x97, 0xe9, 0xd6),
G(0x2c, 0x3a, 0xa6, 0x8a, 0xfe, 0xc4), G(0x2e, 0x39, 0xaf, 0x81, 0xf3, 0xca),
G(0x30, 0x28, 0xd8, 0xe8, 0xb8, 0x90), G(0x32, 0x2b, 0xd1, 0xe3, 0xb5, 0x9e),
G(0x34, 0x2e, 0xca, 0xfe, 0xa2, 0x8c), G(0x36, 0x2d, 0xc3, 0xf5, 0xaf, 0x82),
G(0x38, 0x24, 0xfc, 0xc4, 0x8c, 0xa8), G(0x3a, 0x27, 0xf5, 0xcf, 0x81, 0xa6),
G(0x3c, 0x22, 0xee, 0xd2, 0x96, 0xb4), G(0x3e, 0x21, 0xe7, 0xd9, 0x9b, 0xba),
G(0x40, 0x60, 0x3b, 0x7b, 0xbb, 0xdb), G(0x42, 0x63, 0x32, 0x70, 0xb6, 0xd5),
G(0x44, 0x66, 0x29, 0x6d, 0xa1, 0xc7), G(0x46, 0x65, 0x20, 0x66, 0xac, 0xc9),
G(0x48, 0x6c, 0x1f, 0x57, 0x8f, 0xe3), G(0x4a, 0x6f, 0x16, 0x5c, 0x82, 0xed),
G(0x4c, 0x6a, 0x0d, 0x41, 0x95, 0xff), G(0x4e, 0x69, 0x04, 0x4a, 0x98, 0xf1),
G(0x50, 0x78, 0x73, 0x23, 0xd3, 0xab), G(0x52, 0x7b, 0x7a, 0x28, 0xde, 0xa5),
G(0x54, 0x7e, 0x61, 0x35, 0xc9, 0xb7), G(0x56, 0x7d, 0x68, 0x3e, 0xc4, 0xb9),
G(0x58, 0x74, 0x57, 0x0f, 0xe7, 0x93), G(0x5a, 0x77, 0x5e, 0x04, 0xea, 0x9d),
G(0x5c, 0x72, 0x45, 0x19, 0xfd, 0x8f), G(0x5e, 0x71, 0x4c, 0x12, 0xf0, 0x81),
G(0x60, 0x50, 0xab, 0xcb, 0x6b, 0x3b), G(0x62, 0x53, 0xa2, 0xc0, 0x66, 0x35),
G(0x64, 0x56, 0xb9, 0xdd, 0x71, 0x27), G(0x66, 0x55, 0xb0, 0xd6, 0x7c, 0x29),
G(0x68, 0x5c, 0x8f, 0xe7, 0x5f, 0x03), G(0x6a, 0x5f, 0x86, 0xec, 0x52, 0x0d),
G(0x6c, 0x5a, 0x9d, 0xf1, 0x45, 0x1f), G(0x6e, 0x59, 0x94, 0xfa, 0x48, 0x11),
G(0x70, 0x48, 0xe3, 0x93, 0x03, 0x4b), G(0x72, 0x4b, 0xea, 0x98, 0x0e, 0x45),
G(0x74, 0x4e, 0xf1, 0x85, 0x19, 0x57), G(0x76, 0x4d, 0xf8, 0x8e, 0x14, 0x59),
G(0x78, 0x44, 0xc7, 0xbf, 0x37, 0x73), G(0x7a, 0x47, 0xce, 0xb4, 0x3a, 0x7d),
G(0x7c, 0x42, 0xd5, 0xa9, 0x2d, 0x6f), G(0x7e, 0x41, 0xdc, 0xa2, 0x20, 0x61),
G(0x80, 0xc0, 0x76, 0xf6, 0x6d, 0xad), G(0x82, 0xc3, 0x7f, 0xfd, 0x60, 0xa3),
G(0x84, 0xc6, 0x64, 0xe0, 0x77, 0xb1), G(0x86, 0xc5, 0x6d, 0xeb, 0x7a, 0xbf),
G(0x88, 0xcc, 0x52, 0xda, 0x59, 0x95), G(0x8a, 0xcf, 0x5b, 0xd1, 0x54, 0x9b),
G(0x8c, 0xca, 0x40, 0xcc, 0x43, 0x89), G(0x8e, 0xc9, 0x49, 0xc7, 0x4e, 0x87),
G(0x90, 0xd8, 0x3e, 0xae, 0x05, 0xdd), G(0x92, 0xdb, 0x37, 0xa5, 0x08, 0xd3),
G(0x94, 0xde, 0x2c, 0xb8, 0x1f, 0xc1), G(0x96, 0xdd, 0x25, 0xb3, 0x12, 0xcf),
G(0x98, 0xd4, 0x1a, 0x82, 0x31, 0xe5), G(0x9a, 0xd7, 0x13, 0x89, 0x3c, 0xeb),
G(0x9c, 0xd2, 0x08, 0x94, 0x2b, 0xf9), G(0x9e, 0xd1, 0x01, 0x9f, 0x26, 0xf7),
G(0xa0, 0xf0, 0xe6, 0x46, 0xbd, 0x4d), G(0xa2, 0xf3, 0xef, 0x4d, 0xb0, 0x43),
G(0xa4, 0xf6, 0xf4, 0x50, 0xa7, 0x51), G(0xa6, 0xf5, 0xfd, 0x5b, 0xaa, 0x5f),
G(0xa8, 0xfc, 0xc2, 0x6a, 0x89, 0x75), G(0xaa, 0xff, 0xcb, 0x61, 0x84, 0x7b),
G(0xac, 0xfa, 0xd0, 0x7c, 0x93, 0x69), G(0xae, 0xf9, 0xd9, 0x77, 0x9e, 0x67),
G(0xb0, 0xe8, 0xae, 0x1e, 0xd5, 0x3d), G(0xb2, 0xeb, 0xa7, 0x15, 0xd8, 0x33),
G(0xb4, 0xee, 0xbc, 0x08, 0xcf, 0x21), G(0xb6, 0xed, 0xb5, 0x03, 0xc2, 0x2f),
G(0xb8, 0xe4, 0x8a, 0x32, 0xe1, 0x05), G(0xba, 0xe7, 0x83, 0x39, 0xec, 0x0b),
G(0xbc, 0xe2, 0x98, 0x24, 0xfb, 0x19), G(0xbe, 0xe1, 0x91, 0x2f, 0xf6, 0x17),
G(0xc0, 0xa0, 0x4d, 0x8d, 0xd6, 0x76), G(0xc2, 0xa3, 0x44, 0x86, 0xdb, 0x78),
G(0xc4, 0xa6, 0x5f, 0x9b, 0xcc, 0x6a), G(0xc6, 0xa5, 0x56, 0x90, 0xc1, 0x64),
G(0xc8, 0xac, 0x69, 0xa1, 0xe2, 0x4e), G(0xca, 0xaf, 0x60, 0xaa, 0xef, 0x40),
G(0xcc, 0xaa, 0x7b, 0xb7, 0xf8, 0x52), G(0xce, 0xa9, 0x72, 0xbc, 0xf5, 0x5c),
G(0xd0, 0xb8, 0x05, 0xd5, 0xbe, 0x06), G(0xd2, 0xbb, 0x0c, 0xde, 0xb3, 0x08),
G(0xd4, 0xbe, 0x17, 0xc3, 0xa4, 0x1a), G(0xd6, 0xbd, 0x1e, 0xc8, 0xa9, 0x14),
G(0xd8, 0xb4, 0x21, 0xf9, 0x8a, 0x3e), G(0xda, 0xb7, 0x28, 0xf2, 0x87, 0x30),
G(0xdc, 0xb2, 0x33, 0xef, 0x90, 0x22), G(0xde, 0xb1, 0x3a, 0xe4, 0x9d, 0x2c),
G(0xe0, 0x90, 0xdd, 0x3d, 0x06, 0x96), G(0xe2, 0x93, 0xd4, 0x36, 0x0b, 0x98),
G(0xe4, 0x96, 0xcf, 0x2b, 0x1c, 0x8a), G(0xe6, 0x95, 0xc6, 0x20, 0x11, 0x84),
G(0xe8, 0x9c, 0xf9, 0x11, 0x32, 0xae), G(0xea, 0x9f, 0xf0, 0x1a, 0x3f, 0xa0),
G(0xec, 0x9a, 0xeb, 0x07, 0x28, 0xb2), G(0xee, 0x99, 0xe2, 0x0c, 0x25, 0xbc),
G(0xf0, 0x88, 0x95, 0x65, 0x6e, 0xe6), G(0xf2, 0x8b, 0x9c, 0x6e, 0x63, 0xe8),
G(0xf4, 0x8e, 0x87, 0x73, 0x74, 0xfa), G(0xf6, 0x8d, 0x8e, 0x78, 0x79, 0xf4),
G(0xf8, 0x84, 0xb1, 0x49, 0x5a, 0xde), G(0xfa, 0x87, 0xb8, 0x42, 0x57, 0xd0),
G(0xfc, 0x82, 0xa3, 0x5f, 0x40, 0xc2), G(0xfe, 0x81, 0xaa, 0x54, 0x4d, 0xcc),
G(0x1b, 0x9b, 0xec, 0xf7, 0xda, 0x41), G(0x19, 0x98, 0xe5, 0xfc, 0xd7, 0x4f),
G(0x1f, 0x9d, 0xfe, 0xe1, 0xc0, 0x5d), G(0x1d, 0x9e, 0xf7, 0xea, 0xcd, 0x53),
G(0x13, 0x97, 0xc8, 0xdb, 0xee, 0x79), G(0x11, 0x94, 0xc1, 0xd0, 0xe3, 0x77),
G(0x17, 0x91, 0xda, 0xcd, 0xf4, 0x65), G(0x15, 0x92, 0xd3, 0xc6, 0xf9, 0x6b),
G(0x0b, 0x83, 0xa4, 0xaf, 0xb2, 0x31), G(0x09, 0x80, 0xad, 0xa4, 0xbf, 0x3f),
G(0x0f, 0x85, 0xb6, 0xb9, 0xa8, 0x2d), G(0x0d, 0x86, 0xbf, 0xb2, 0xa5, 0x23),
G(0x03, 0x8f, 0x80, 0x83, 0x86, 0x09), G(0x01, 0x8c, 0x89, 0x88, 0x8b, 0x07),
G(0x07, 0x89, 0x92, 0x95, 0x9c, 0x15), G(0x05, 0x8a, 0x9b, 0x9e, 0x91, 0x1b),
G(0x3b, 0xab, 0x7c, 0x47, 0x0a, 0xa1), G(0x39, 0xa8, 0x75, 0x4c, 0x07, 0xaf),
G(0x3f, 0xad, 0x6e, 0x51, 0x10, 0xbd), G(0x3d, 0xae, 0x67, 0x5a, 0x1d, 0xb3),
G(0x33, 0xa7, 0x58, 0x6b, 0x3e, 0x99), G(0x31, 0xa4, 0x51, 0x60, 0x33, 0x97),
G(0x37, 0xa1, 0x4a, 0x7d, 0x24, 0x85), G(0x35, 0xa2, 0x43, 0x76, 0x29, 0x8b),
G(0x2b, 0xb3, 0x34, 0x1f, 0x62, 0xd1), G(0x29, 0xb0, 0x3d, 0x14, 0x6f, 0xdf),
G(0x2f, 0xb5, 0x26, 0x09, 0x78, 0xcd), G(0x2d, 0xb6, 0x2f, 0x02, 0x75, 0xc3),
G(0x23, 0xbf, 0x10, 0x33, 0x56, 0xe9), G(0x21, 0xbc, 0x19, 0x38, 0x5b, 0xe7),
G(0x27, 0xb9, 0x02, 0x25, 0x4c, 0xf5), G(0x25, 0xba, 0x0b, 0x2e, 0x41, 0xfb),
G(0x5b, 0xfb, 0xd7, 0x8c, 0x61, 0x9a), G(0x59, 0xf8, 0xde, 0x87, 0x6c, 0x94),
G(0x5f, 0xfd, 0xc5, 0x9a, 0x7b, 0x86), G(0x5d, 0xfe, 0xcc, 0x91, 0x76, 0x88),
G(0x53, 0xf7, 0xf3, 0xa0, 0x55, 0xa2), G(0x51, 0xf4, 0xfa, 0xab, 0x58, 0xac),
G(0x57, 0xf1, 0xe1, 0xb6, 0x4f, 0xbe), G(0x55, 0xf2, 0xe8, 0xbd, 0x42, 0xb0),
G(0x4b, 0xe3, 0x9f, 0xd4, 0x09, 0xea), G(0x49, 0xe0, 0x96, 0xdf, 0x04, 0xe4),
G(0x4f, 0xe5, 0x8d, 0xc2, 0x13, 0xf6), G(0x4d, 0xe6, 0x84, 0xc9, 0x1e, 0xf8),
G(0x43, 0xef, 0xbb, 0xf8, 0x3d, 0xd2), G(0x41, 0xec, 0xb2, 0xf3, 0x30, 0xdc),
G(0x47, 0xe9, 0xa9, 0xee, 0x27, 0xce), G(0x45, 0xea, 0xa0, 0xe5, 0x2a, 0xc0),
G(0x7b, 0xcb, 0x47, 0x3c, 0xb1, 0x7a), G(0x79, 0xc8, 0x4e, 0x37, 0xbc, 0x74),
G(0x7f, 0xcd, 0x55, 0x2a, 0xab, 0x66), G(0x7d, 0xce, 0x5c, 0x21, 0xa6, 0x68),
G(0x73, 0xc7, 0x63, 0x10, 0x85, 0x42), G(0x71, 0xc4, 0x6a, 0x1b, 0x88, 0x4c),
G(0x77, 0xc1, 0x71, 0x06, 0x9f, 0x5e), G(0x75, 0xc2, 0x78, 0x0d, 0x92, 0x50),
G(0x6b, 0xd3, 0x0f, 0x64, 0xd9, 0x0a), G(0x69, 0xd0, 0x06, 0x6f, 0xd4, 0x04),
G(0x6f, 0xd5, 0x1d, 0x72, 0xc3, 0x16), G(0x6d, 0xd6, 0x14, 0x79, 0xce, 0x18),
G(0x63, 0xdf, 0x2b, 0x48, 0xed, 0x32), G(0x61, 0xdc, 0x22, 0x43, 0xe0, 0x3c),
G(0x67, 0xd9, 0x39, 0x5e, 0xf7, 0x2e), G(0x65, 0xda, 0x30, 0x55, 0xfa, 0x20),
G(0x9b, 0x5b, 0x9a, 0x01, 0xb7, 0xec), G(0x99, 0x58, 0x93, 0x0a, 0xba, 0xe2),
G(0x9f, 0x5d, 0x88, 0x17, 0xad, 0xf0), G(0x9d, 0x5e, 0x81, 0x1c, 0xa0, 0xfe),
G(0x93, 0x57, 0xbe, 0x2d, 0x83, 0xd4), G(0x91, 0x54, 0xb7, 0x26, 0x8e, 0xda),
G(0x97, 0x51, 0xac, 0x3b, 0x99, 0xc8), G(0x95, 0x52, 0xa5, 0x30, 0x94, 0xc6),
G(0x8b, 0x43, 0xd2, 0x59, 0xdf, 0x9c), G(0x89, 0x40, 0xdb, 0x52, 0xd2, 0x92),
G(0x8f, 0x45, 0xc0, 0x4f, 0xc5, 0x80), G(0x8d, 0x46, 0xc9, 0x44, 0xc8, 0x8e),
G(0x83, 0x4f, 0xf6, 0x75, 0xeb, 0xa4), G(0x81, 0x4c, 0xff, 0x7e, 0xe6, 0xaa),
G(0x87, 0x49, 0xe4, 0x63, 0xf1, 0xb8), G(0x85, 0x4a, 0xed, 0x68, 0xfc, 0xb6),
G(0xbb, 0x6b, 0x0a, 0xb1, 0x67, 0x0c), G(0xb9, 0x68, 0x03, 0xba, 0x6a, 0x02),
G(0xbf, 0x6d, 0x18, 0xa7, 0x7d, 0x10), G(0xbd, 0x6e, 0x11, 0xac, 0x70, 0x1e),
G(0xb3, 0x67, 0x2e, 0x9d, 0x53, 0x34), G(0xb1, 0x64, 0x27, 0x96, 0x5e, 0x3a),
G(0xb7, 0x61, 0x3c, 0x8b, 0x49, 0x28), G(0xb5, 0x62, 0x35, 0x80, 0x44, 0x26),
G(0xab, 0x73, 0x42, 0xe9, 0x0f, 0x7c), G(0xa9, 0x70, 0x4b, 0xe2, 0x02, 0x72),
G(0xaf, 0x75, 0x50, 0xff, 0x15, 0x60), G(0xad, 0x76, 0x59, 0xf4, 0x18, 0x6e),
G(0xa3, 0x7f, 0x66, 0xc5, 0x3b, 0x44), G(0xa1, 0x7c, 0x6f, 0xce, 0x36, 0x4a),
G(0xa7, 0x79, 0x74, 0xd3, 0x21, 0x58), G(0xa5, 0x7a, 0x7d, 0xd8, 0x2c, 0x56),
G(0xdb, 0x3b, 0xa1, 0x7a, 0x0c, 0x37), G(0xd9, 0x38, 0xa8, 0x71, 0x01, 0x39),
G(0xdf, 0x3d, 0xb3, 0x6c, 0x16, 0x2b), G(0xdd, 0x3e, 0xba, 0x67, 0x1b, 0x25),
G(0xd3, 0x37, 0x85, 0x56, 0x38, 0x0f), G(0xd1, 0x34, 0x8c, 0x5d, 0x35, 0x01),
G(0xd7, 0x31, 0x97, 0x40, 0x22, 0x13), G(0xd5, 0x32, 0x9e, 0x4b, 0x2f, 0x1d),
G(0xcb, 0x23, 0xe9, 0x22, 0x64, 0x47), G(0xc9, 0x20, 0xe0, 0x29, 0x69, 0x49),
G(0xcf, 0x25, 0xfb, 0x34, 0x7e, 0x5b), G(0xcd, 0x26, 0xf2, 0x3f, 0x73, 0x55),
G(0xc3, 0x2f, 0xcd, 0x0e, 0x50, 0x7f), G(0xc1, 0x2c, 0xc4, 0x05, 0x5d, 0x71),
G(0xc7, 0x29, 0xdf, 0x18, 0x4a, 0x63), G(0xc5, 0x2a, 0xd6, 0x13, 0x47, 0x6d),
G(0xfb, 0x0b, 0x31, 0xca, 0xdc, 0xd7), G(0xf9, 0x08, 0x38, 0xc1, 0xd1, 0xd9),
G(0xff, 0x0d, 0x23, 0xdc, 0xc6, 0xcb), G(0xfd, 0x0e, 0x2a, 0xd7, 0xcb, 0xc5),
G(0xf3, 0x07, 0x15, 0xe6, 0xe8, 0xef), G(0xf1, 0x04, 0x1c, 0xed, 0xe5, 0xe1),
G(0xf7, 0x01, 0x07, 0xf0, 0xf2, 0xf3), G(0xf5, 0x02, 0x0e, 0xfb, 0xff, 0xfd),
G(0xeb, 0x13, 0x79, 0x92, 0xb4, 0xa7), G(0xe9, 0x10, 0x70, 0x99, 0xb9, 0xa9),
G(0xef, 0x15, 0x6b, 0x84, 0xae, 0xbb), G(0xed, 0x16, 0x62, 0x8f, 0xa3, 0xb5),
G(0xe3, 0x1f, 0x5d, 0xbe, 0x80, 0x9f), G(0xe1, 0x1c, 0x54, 0xb5, 0x8d, 0x91),
G(0xe7, 0x19, 0x4f, 0xa8, 0x9a, 0x83), G(0xe5, 0x1a, 0x46, 0xa3, 0x97, 0x8d),
};
#undef G
static void expand_key(uint8_t *expandedKey, uint8_t *key, int size, size_t expandedKeySize)
{
int csz;
int i;
uint8_t t[4] = { 0 };
for (i = 0; i < size; i++)
expandedKey[i] = key[i];
csz = size;
i = 1;
while (csz < expandedKeySize) {
t[0] = expandedKey[(csz - 4) + 0];
t[1] = expandedKey[(csz - 4) + 1];
t[2] = expandedKey[(csz - 4) + 2];
t[3] = expandedKey[(csz - 4) + 3];
if (csz % size == 0) {
uint8_t tmp;
tmp = t[0];
t[0] = sbox[t[1]] ^ Rcon[i++ % sizeof(Rcon)];
t[1] = sbox[t[2]];
t[2] = sbox[t[3]];
t[3] = sbox[tmp];
}
if (size == 32 && ((csz % size) == 16)) {
t[0] = sbox[t[0]];
t[1] = sbox[t[1]];
t[2] = sbox[t[2]];
t[3] = sbox[t[3]];
}
expandedKey[csz] = expandedKey[csz - size] ^ t[0]; csz++;
expandedKey[csz] = expandedKey[csz - size] ^ t[1]; csz++;
expandedKey[csz] = expandedKey[csz - size] ^ t[2]; csz++;
expandedKey[csz] = expandedKey[csz - size] ^ t[3]; csz++;
}
}
static void shift_rows(uint8_t *state)
{
uint32_t *s32;
int i;
for (i = 0; i < 16; i++)
state[i] = sbox[state[i]];
s32 = (uint32_t *) state;
s32[1] = rol32_be(s32[1], 8);
s32[2] = rol32_be(s32[2], 16);
s32[3] = rol32_be(s32[3], 24);
}
static void add_round_key(uint8_t *state, uint8_t *rk)
{
uint32_t *s32, *r32;
s32 = (uint32_t *) state;
r32 = (uint32_t *) rk;
s32[0] ^= r32[0];
s32[1] ^= r32[1];
s32[2] ^= r32[2];
s32[3] ^= r32[3];
}
#define gm1(a) (a)
#define gm2(a) gmtab[a][0]
#define gm3(a) gmtab[a][1]
#define gm9(a) gmtab[a][2]
#define gm11(a) gmtab[a][3]
#define gm13(a) gmtab[a][4]
#define gm14(a) gmtab[a][5]
static void mix_columns(uint8_t *state)
{
int i;
uint8_t cpy[4];
for (i = 0; i < 4; i++) {
cpy[0] = state[0 * 4 + i];
cpy[1] = state[1 * 4 + i];
cpy[2] = state[2 * 4 + i];
cpy[3] = state[3 * 4 + i];
state[i] = gm2(cpy[0]) ^ gm1(cpy[3]) ^ gm1(cpy[2]) ^ gm3(cpy[1]);
state[4+i] = gm2(cpy[1]) ^ gm1(cpy[0]) ^ gm1(cpy[3]) ^ gm3(cpy[2]);
state[8+i] = gm2(cpy[2]) ^ gm1(cpy[1]) ^ gm1(cpy[0]) ^ gm3(cpy[3]);
state[12+i] = gm2(cpy[3]) ^ gm1(cpy[2]) ^ gm1(cpy[1]) ^ gm3(cpy[0]);
}
}
static void create_round_key(uint8_t *expandedKey, uint8_t *rk)
{
int i,j;
for (i = 0; i < 4; i++)
for (j = 0; j < 4; j++)
rk[i + j * 4] = expandedKey[i * 4 + j];
}
static void aes_main(aes_key *key, uint8_t *state)
{
int i = 0;
uint32_t rk[4];
uint8_t *rkptr = (uint8_t *) rk;
create_round_key(key->data, rkptr);
add_round_key(state, rkptr);
for (i = 1; i < key->nbr; i++) {
create_round_key(key->data + 16 * i, rkptr);
shift_rows(state);
mix_columns(state);
add_round_key(state, rkptr);
}
create_round_key(key->data + 16 * key->nbr, rkptr);
shift_rows(state);
add_round_key(state, rkptr);
}
static void shift_rows_inv(uint8_t *state)
{
uint32_t *s32;
int i;
s32 = (uint32_t *) state;
s32[1] = ror32_be(s32[1], 8);
s32[2] = ror32_be(s32[2], 16);
s32[3] = ror32_be(s32[3], 24);
for (i = 0; i < 16; i++)
state[i] = rsbox[state[i]];
}
static void mix_columns_inv(uint8_t *state)
{
int i;
uint8_t cpy[4];
for (i = 0; i < 4; i++) {
cpy[0] = state[0 * 4 + i];
cpy[1] = state[1 * 4 + i];
cpy[2] = state[2 * 4 + i];
cpy[3] = state[3 * 4 + i];
state[i] = gm14(cpy[0]) ^ gm9(cpy[3]) ^ gm13(cpy[2]) ^ gm11(cpy[1]);
state[4+i] = gm14(cpy[1]) ^ gm9(cpy[0]) ^ gm13(cpy[3]) ^ gm11(cpy[2]);
state[8+i] = gm14(cpy[2]) ^ gm9(cpy[1]) ^ gm13(cpy[0]) ^ gm11(cpy[3]);
state[12+i] = gm14(cpy[3]) ^ gm9(cpy[2]) ^ gm13(cpy[1]) ^ gm11(cpy[0]);
}
}
static void aes_main_inv(aes_key *key, uint8_t *state)
{
int i = 0;
uint32_t rk[4];
uint8_t *rkptr = (uint8_t *) rk;
create_round_key(key->data + 16 * key->nbr, rkptr);
add_round_key(state, rkptr);
for (i = key->nbr - 1; i > 0; i--) {
create_round_key(key->data + 16 * i, rkptr);
shift_rows_inv(state);
add_round_key(state, rkptr);
mix_columns_inv(state);
}
create_round_key(key->data, rkptr);
shift_rows_inv(state);
add_round_key(state, rkptr);
}
/* Set the block values, for the block:
* a0,0 a0,1 a0,2 a0,3
* a1,0 a1,1 a1,2 a1,3 -> a0,0 a1,0 a2,0 a3,0 a0,1 a1,1 ... a2,3 a3,3
* a2,0 a2,1 a2,2 a2,3
* a3,0 a3,1 a3,2 a3,3
*/
#define swap_block(t, f) \
t[0] = f[0]; t[4] = f[1]; t[8] = f[2]; t[12] = f[3]; \
t[1] = f[4]; t[5] = f[5]; t[9] = f[6]; t[13] = f[7]; \
t[2] = f[8]; t[6] = f[9]; t[10] = f[10]; t[14] = f[11]; \
t[3] = f[12]; t[7] = f[13]; t[11] = f[14]; t[15] = f[15]
void cryptonite_aes_generic_encrypt_block(aes_block *output, aes_key *key, aes_block *input)
{
uint32_t block[4];
uint8_t *iptr, *optr, *bptr;
iptr = (uint8_t *) input;
optr = (uint8_t *) output;
bptr = (uint8_t *) block;
swap_block(bptr, iptr);
aes_main(key, bptr);
swap_block(optr, bptr);
}
void cryptonite_aes_generic_decrypt_block(aes_block *output, aes_key *key, aes_block *input)
{
uint32_t block[4];
uint8_t *iptr, *optr, *bptr;
iptr = (uint8_t *) input;
optr = (uint8_t *) output;
bptr = (uint8_t *) block;
swap_block(bptr, iptr);
aes_main_inv(key, bptr);
swap_block(optr, bptr);
}
void cryptonite_aes_generic_init(aes_key *key, uint8_t *origkey, uint8_t size)
{
int esz;
switch (size) {
case 16: key->nbr = 10; esz = 176; break;
case 24: key->nbr = 12; esz = 208; break;
case 32: key->nbr = 14; esz = 240; break;
default: return;
}
expand_key(key->data, origkey, size, esz);
return;
}