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/*
 *  FIPS-197 compliant AES implementation
 *
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 *  Copyright (C) 2006-2014, Brainspark B.V.
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 *
 *  This file is part of PolarSSL (http://www.polarssl.org)
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 *  Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
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 *
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 *  All rights reserved.
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 *
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 *  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 2 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, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
/*
 *  The AES block cipher was designed by Vincent Rijmen and Joan Daemen.
 *
 *  http://csrc.nist.gov/encryption/aes/rijndael/Rijndael.pdf
 *  http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf
 */

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#include "polarssl/config.h"
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#if defined(POLARSSL_AES_C)
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#include "polarssl/aes.h"
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#if defined(POLARSSL_PADLOCK_C)
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#include "polarssl/padlock.h"
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#endif
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#if defined(POLARSSL_AESNI_C)
#include "polarssl/aesni.h"
#endif
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#if defined(POLARSSL_PLATFORM_C)
#include "polarssl/platform.h"
#else
#define polarssl_printf printf
#endif

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#if !defined(POLARSSL_AES_ALT)

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/*
 * 32-bit integer manipulation macros (little endian)
 */
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#ifndef GET_UINT32_LE
#define GET_UINT32_LE(n,b,i)                            \
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{                                                       \
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    (n) = ( (uint32_t) (b)[(i)    ]       )             \
        | ( (uint32_t) (b)[(i) + 1] <<  8 )             \
        | ( (uint32_t) (b)[(i) + 2] << 16 )             \
        | ( (uint32_t) (b)[(i) + 3] << 24 );            \
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}
#endif

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#ifndef PUT_UINT32_LE
#define PUT_UINT32_LE(n,b,i)                            \
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{                                                       \
    (b)[(i)    ] = (unsigned char) ( (n)       );       \
    (b)[(i) + 1] = (unsigned char) ( (n) >>  8 );       \
    (b)[(i) + 2] = (unsigned char) ( (n) >> 16 );       \
    (b)[(i) + 3] = (unsigned char) ( (n) >> 24 );       \
}
#endif

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#if defined(POLARSSL_PADLOCK_C) &&                      \
    ( defined(POLARSSL_HAVE_X86) || defined(PADLOCK_ALIGN16) )
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static int aes_padlock_ace = -1;
#endif

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#if defined(POLARSSL_AES_ROM_TABLES)
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/*
 * Forward S-box
 */
static const unsigned char FSb[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
};

/*
 * Forward tables
 */
#define FT \
\
    V(A5,63,63,C6), V(84,7C,7C,F8), V(99,77,77,EE), V(8D,7B,7B,F6), \
    V(0D,F2,F2,FF), V(BD,6B,6B,D6), V(B1,6F,6F,DE), V(54,C5,C5,91), \
    V(50,30,30,60), V(03,01,01,02), V(A9,67,67,CE), V(7D,2B,2B,56), \
    V(19,FE,FE,E7), V(62,D7,D7,B5), V(E6,AB,AB,4D), V(9A,76,76,EC), \
    V(45,CA,CA,8F), V(9D,82,82,1F), V(40,C9,C9,89), V(87,7D,7D,FA), \
    V(15,FA,FA,EF), V(EB,59,59,B2), V(C9,47,47,8E), V(0B,F0,F0,FB), \
    V(EC,AD,AD,41), V(67,D4,D4,B3), V(FD,A2,A2,5F), V(EA,AF,AF,45), \
    V(BF,9C,9C,23), V(F7,A4,A4,53), V(96,72,72,E4), V(5B,C0,C0,9B), \
    V(C2,B7,B7,75), V(1C,FD,FD,E1), V(AE,93,93,3D), V(6A,26,26,4C), \
    V(5A,36,36,6C), V(41,3F,3F,7E), V(02,F7,F7,F5), V(4F,CC,CC,83), \
    V(5C,34,34,68), V(F4,A5,A5,51), V(34,E5,E5,D1), V(08,F1,F1,F9), \
    V(93,71,71,E2), V(73,D8,D8,AB), V(53,31,31,62), V(3F,15,15,2A), \
    V(0C,04,04,08), V(52,C7,C7,95), V(65,23,23,46), V(5E,C3,C3,9D), \
    V(28,18,18,30), V(A1,96,96,37), V(0F,05,05,0A), V(B5,9A,9A,2F), \
    V(09,07,07,0E), V(36,12,12,24), V(9B,80,80,1B), V(3D,E2,E2,DF), \
    V(26,EB,EB,CD), V(69,27,27,4E), V(CD,B2,B2,7F), V(9F,75,75,EA), \
    V(1B,09,09,12), V(9E,83,83,1D), V(74,2C,2C,58), V(2E,1A,1A,34), \
    V(2D,1B,1B,36), V(B2,6E,6E,DC), V(EE,5A,5A,B4), V(FB,A0,A0,5B), \
    V(F6,52,52,A4), V(4D,3B,3B,76), V(61,D6,D6,B7), V(CE,B3,B3,7D), \
    V(7B,29,29,52), V(3E,E3,E3,DD), V(71,2F,2F,5E), V(97,84,84,13), \
    V(F5,53,53,A6), V(68,D1,D1,B9), V(00,00,00,00), V(2C,ED,ED,C1), \
    V(60,20,20,40), V(1F,FC,FC,E3), V(C8,B1,B1,79), V(ED,5B,5B,B6), \
    V(BE,6A,6A,D4), V(46,CB,CB,8D), V(D9,BE,BE,67), V(4B,39,39,72), \
    V(DE,4A,4A,94), V(D4,4C,4C,98), V(E8,58,58,B0), V(4A,CF,CF,85), \
    V(6B,D0,D0,BB), V(2A,EF,EF,C5), V(E5,AA,AA,4F), V(16,FB,FB,ED), \
    V(C5,43,43,86), V(D7,4D,4D,9A), V(55,33,33,66), V(94,85,85,11), \
    V(CF,45,45,8A), V(10,F9,F9,E9), V(06,02,02,04), V(81,7F,7F,FE), \
    V(F0,50,50,A0), V(44,3C,3C,78), V(BA,9F,9F,25), V(E3,A8,A8,4B), \
    V(F3,51,51,A2), V(FE,A3,A3,5D), V(C0,40,40,80), V(8A,8F,8F,05), \
    V(AD,92,92,3F), V(BC,9D,9D,21), V(48,38,38,70), V(04,F5,F5,F1), \
    V(DF,BC,BC,63), V(C1,B6,B6,77), V(75,DA,DA,AF), V(63,21,21,42), \
    V(30,10,10,20), V(1A,FF,FF,E5), V(0E,F3,F3,FD), V(6D,D2,D2,BF), \
    V(4C,CD,CD,81), V(14,0C,0C,18), V(35,13,13,26), V(2F,EC,EC,C3), \
    V(E1,5F,5F,BE), V(A2,97,97,35), V(CC,44,44,88), V(39,17,17,2E), \
    V(57,C4,C4,93), V(F2,A7,A7,55), V(82,7E,7E,FC), V(47,3D,3D,7A), \
    V(AC,64,64,C8), V(E7,5D,5D,BA), V(2B,19,19,32), V(95,73,73,E6), \
    V(A0,60,60,C0), V(98,81,81,19), V(D1,4F,4F,9E), V(7F,DC,DC,A3), \
    V(66,22,22,44), V(7E,2A,2A,54), V(AB,90,90,3B), V(83,88,88,0B), \
    V(CA,46,46,8C), V(29,EE,EE,C7), V(D3,B8,B8,6B), V(3C,14,14,28), \
    V(79,DE,DE,A7), V(E2,5E,5E,BC), V(1D,0B,0B,16), V(76,DB,DB,AD), \
    V(3B,E0,E0,DB), V(56,32,32,64), V(4E,3A,3A,74), V(1E,0A,0A,14), \
    V(DB,49,49,92), V(0A,06,06,0C), V(6C,24,24,48), V(E4,5C,5C,B8), \
    V(5D,C2,C2,9F), V(6E,D3,D3,BD), V(EF,AC,AC,43), V(A6,62,62,C4), \
    V(A8,91,91,39), V(A4,95,95,31), V(37,E4,E4,D3), V(8B,79,79,F2), \
    V(32,E7,E7,D5), V(43,C8,C8,8B), V(59,37,37,6E), V(B7,6D,6D,DA), \
    V(8C,8D,8D,01), V(64,D5,D5,B1), V(D2,4E,4E,9C), V(E0,A9,A9,49), \
    V(B4,6C,6C,D8), V(FA,56,56,AC), V(07,F4,F4,F3), V(25,EA,EA,CF), \
    V(AF,65,65,CA), V(8E,7A,7A,F4), V(E9,AE,AE,47), V(18,08,08,10), \
    V(D5,BA,BA,6F), V(88,78,78,F0), V(6F,25,25,4A), V(72,2E,2E,5C), \
    V(24,1C,1C,38), V(F1,A6,A6,57), V(C7,B4,B4,73), V(51,C6,C6,97), \
    V(23,E8,E8,CB), V(7C,DD,DD,A1), V(9C,74,74,E8), V(21,1F,1F,3E), \
    V(DD,4B,4B,96), V(DC,BD,BD,61), V(86,8B,8B,0D), V(85,8A,8A,0F), \
    V(90,70,70,E0), V(42,3E,3E,7C), V(C4,B5,B5,71), V(AA,66,66,CC), \
    V(D8,48,48,90), V(05,03,03,06), V(01,F6,F6,F7), V(12,0E,0E,1C), \
    V(A3,61,61,C2), V(5F,35,35,6A), V(F9,57,57,AE), V(D0,B9,B9,69), \
    V(91,86,86,17), V(58,C1,C1,99), V(27,1D,1D,3A), V(B9,9E,9E,27), \
    V(38,E1,E1,D9), V(13,F8,F8,EB), V(B3,98,98,2B), V(33,11,11,22), \
    V(BB,69,69,D2), V(70,D9,D9,A9), V(89,8E,8E,07), V(A7,94,94,33), \
    V(B6,9B,9B,2D), V(22,1E,1E,3C), V(92,87,87,15), V(20,E9,E9,C9), \
    V(49,CE,CE,87), V(FF,55,55,AA), V(78,28,28,50), V(7A,DF,DF,A5), \
    V(8F,8C,8C,03), V(F8,A1,A1,59), V(80,89,89,09), V(17,0D,0D,1A), \
    V(DA,BF,BF,65), V(31,E6,E6,D7), V(C6,42,42,84), V(B8,68,68,D0), \
    V(C3,41,41,82), V(B0,99,99,29), V(77,2D,2D,5A), V(11,0F,0F,1E), \
    V(CB,B0,B0,7B), V(FC,54,54,A8), V(D6,BB,BB,6D), V(3A,16,16,2C)

#define V(a,b,c,d) 0x##a##b##c##d
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static const uint32_t FT0[256] = { FT };
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#undef V

#define V(a,b,c,d) 0x##b##c##d##a
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static const uint32_t FT1[256] = { FT };
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#undef V

#define V(a,b,c,d) 0x##c##d##a##b
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static const uint32_t FT2[256] = { FT };
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#undef V

#define V(a,b,c,d) 0x##d##a##b##c
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static const uint32_t FT3[256] = { FT };
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#undef V

#undef FT

/*
 * Reverse S-box
 */
static const unsigned char RSb[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
};

/*
 * Reverse tables
 */
#define RT \
\
    V(50,A7,F4,51), V(53,65,41,7E), V(C3,A4,17,1A), V(96,5E,27,3A), \
    V(CB,6B,AB,3B), V(F1,45,9D,1F), V(AB,58,FA,AC), V(93,03,E3,4B), \
    V(55,FA,30,20), V(F6,6D,76,AD), V(91,76,CC,88), V(25,4C,02,F5), \
    V(FC,D7,E5,4F), V(D7,CB,2A,C5), V(80,44,35,26), V(8F,A3,62,B5), \
    V(49,5A,B1,DE), V(67,1B,BA,25), V(98,0E,EA,45), V(E1,C0,FE,5D), \
    V(02,75,2F,C3), V(12,F0,4C,81), V(A3,97,46,8D), V(C6,F9,D3,6B), \
    V(E7,5F,8F,03), V(95,9C,92,15), V(EB,7A,6D,BF), V(DA,59,52,95), \
    V(2D,83,BE,D4), V(D3,21,74,58), V(29,69,E0,49), V(44,C8,C9,8E), \
    V(6A,89,C2,75), V(78,79,8E,F4), V(6B,3E,58,99), V(DD,71,B9,27), \
    V(B6,4F,E1,BE), V(17,AD,88,F0), V(66,AC,20,C9), V(B4,3A,CE,7D), \
    V(18,4A,DF,63), V(82,31,1A,E5), V(60,33,51,97), V(45,7F,53,62), \
    V(E0,77,64,B1), V(84,AE,6B,BB), V(1C,A0,81,FE), V(94,2B,08,F9), \
    V(58,68,48,70), V(19,FD,45,8F), V(87,6C,DE,94), V(B7,F8,7B,52), \
    V(23,D3,73,AB), V(E2,02,4B,72), V(57,8F,1F,E3), V(2A,AB,55,66), \
    V(07,28,EB,B2), V(03,C2,B5,2F), V(9A,7B,C5,86), V(A5,08,37,D3), \
    V(F2,87,28,30), V(B2,A5,BF,23), V(BA,6A,03,02), V(5C,82,16,ED), \
    V(2B,1C,CF,8A), V(92,B4,79,A7), V(F0,F2,07,F3), V(A1,E2,69,4E), \
    V(CD,F4,DA,65), V(D5,BE,05,06), V(1F,62,34,D1), V(8A,FE,A6,C4), \
    V(9D,53,2E,34), V(A0,55,F3,A2), V(32,E1,8A,05), V(75,EB,F6,A4), \
    V(39,EC,83,0B), V(AA,EF,60,40), V(06,9F,71,5E), V(51,10,6E,BD), \
    V(F9,8A,21,3E), V(3D,06,DD,96), V(AE,05,3E,DD), V(46,BD,E6,4D), \
    V(B5,8D,54,91), V(05,5D,C4,71), V(6F,D4,06,04), V(FF,15,50,60), \
    V(24,FB,98,19), V(97,E9,BD,D6), V(CC,43,40,89), V(77,9E,D9,67), \
    V(BD,42,E8,B0), V(88,8B,89,07), V(38,5B,19,E7), V(DB,EE,C8,79), \
    V(47,0A,7C,A1), V(E9,0F,42,7C), V(C9,1E,84,F8), V(00,00,00,00), \
    V(83,86,80,09), V(48,ED,2B,32), V(AC,70,11,1E), V(4E,72,5A,6C), \
    V(FB,FF,0E,FD), V(56,38,85,0F), V(1E,D5,AE,3D), V(27,39,2D,36), \
    V(64,D9,0F,0A), V(21,A6,5C,68), V(D1,54,5B,9B), V(3A,2E,36,24), \
    V(B1,67,0A,0C), V(0F,E7,57,93), V(D2,96,EE,B4), V(9E,91,9B,1B), \
    V(4F,C5,C0,80), V(A2,20,DC,61), V(69,4B,77,5A), V(16,1A,12,1C), \
    V(0A,BA,93,E2), V(E5,2A,A0,C0), V(43,E0,22,3C), V(1D,17,1B,12), \
    V(0B,0D,09,0E), V(AD,C7,8B,F2), V(B9,A8,B6,2D), V(C8,A9,1E,14), \
    V(85,19,F1,57), V(4C,07,75,AF), V(BB,DD,99,EE), V(FD,60,7F,A3), \
    V(9F,26,01,F7), V(BC,F5,72,5C), V(C5,3B,66,44), V(34,7E,FB,5B), \
    V(76,29,43,8B), V(DC,C6,23,CB), V(68,FC,ED,B6), V(63,F1,E4,B8), \
    V(CA,DC,31,D7), V(10,85,63,42), V(40,22,97,13), V(20,11,C6,84), \
    V(7D,24,4A,85), V(F8,3D,BB,D2), V(11,32,F9,AE), V(6D,A1,29,C7), \
    V(4B,2F,9E,1D), V(F3,30,B2,DC), V(EC,52,86,0D), V(D0,E3,C1,77), \
    V(6C,16,B3,2B), V(99,B9,70,A9), V(FA,48,94,11), V(22,64,E9,47), \
    V(C4,8C,FC,A8), V(1A,3F,F0,A0), V(D8,2C,7D,56), V(EF,90,33,22), \
    V(C7,4E,49,87), V(C1,D1,38,D9), V(FE,A2,CA,8C), V(36,0B,D4,98), \
    V(CF,81,F5,A6), V(28,DE,7A,A5), V(26,8E,B7,DA), V(A4,BF,AD,3F), \
    V(E4,9D,3A,2C), V(0D,92,78,50), V(9B,CC,5F,6A), V(62,46,7E,54), \
    V(C2,13,8D,F6), V(E8,B8,D8,90), V(5E,F7,39,2E), V(F5,AF,C3,82), \
    V(BE,80,5D,9F), V(7C,93,D0,69), V(A9,2D,D5,6F), V(B3,12,25,CF), \
    V(3B,99,AC,C8), V(A7,7D,18,10), V(6E,63,9C,E8), V(7B,BB,3B,DB), \
    V(09,78,26,CD), V(F4,18,59,6E), V(01,B7,9A,EC), V(A8,9A,4F,83), \
    V(65,6E,95,E6), V(7E,E6,FF,AA), V(08,CF,BC,21), V(E6,E8,15,EF), \
    V(D9,9B,E7,BA), V(CE,36,6F,4A), V(D4,09,9F,EA), V(D6,7C,B0,29), \
    V(AF,B2,A4,31), V(31,23,3F,2A), V(30,94,A5,C6), V(C0,66,A2,35), \
    V(37,BC,4E,74), V(A6,CA,82,FC), V(B0,D0,90,E0), V(15,D8,A7,33), \
    V(4A,98,04,F1), V(F7,DA,EC,41), V(0E,50,CD,7F), V(2F,F6,91,17), \
    V(8D,D6,4D,76), V(4D,B0,EF,43), V(54,4D,AA,CC), V(DF,04,96,E4), \
    V(E3,B5,D1,9E), V(1B,88,6A,4C), V(B8,1F,2C,C1), V(7F,51,65,46), \
    V(04,EA,5E,9D), V(5D,35,8C,01), V(73,74,87,FA), V(2E,41,0B,FB), \
    V(5A,1D,67,B3), V(52,D2,DB,92), V(33,56,10,E9), V(13,47,D6,6D), \
    V(8C,61,D7,9A), V(7A,0C,A1,37), V(8E,14,F8,59), V(89,3C,13,EB), \
    V(EE,27,A9,CE), V(35,C9,61,B7), V(ED,E5,1C,E1), V(3C,B1,47,7A), \
    V(59,DF,D2,9C), V(3F,73,F2,55), V(79,CE,14,18), V(BF,37,C7,73), \
    V(EA,CD,F7,53), V(5B,AA,FD,5F), V(14,6F,3D,DF), V(86,DB,44,78), \
    V(81,F3,AF,CA), V(3E,C4,68,B9), V(2C,34,24,38), V(5F,40,A3,C2), \
    V(72,C3,1D,16), V(0C,25,E2,BC), V(8B,49,3C,28), V(41,95,0D,FF), \
    V(71,01,A8,39), V(DE,B3,0C,08), V(9C,E4,B4,D8), V(90,C1,56,64), \
    V(61,84,CB,7B), V(70,B6,32,D5), V(74,5C,6C,48), V(42,57,B8,D0)

#define V(a,b,c,d) 0x##a##b##c##d
318
static const uint32_t RT0[256] = { RT };
319 320 321
#undef V

#define V(a,b,c,d) 0x##b##c##d##a
322
static const uint32_t RT1[256] = { RT };
323 324 325
#undef V

#define V(a,b,c,d) 0x##c##d##a##b
326
static const uint32_t RT2[256] = { RT };
327 328 329
#undef V

#define V(a,b,c,d) 0x##d##a##b##c
330
static const uint32_t RT3[256] = { RT };
331 332 333 334 335 336 337
#undef V

#undef RT

/*
 * Round constants
 */
338
static const uint32_t RCON[10] =
339 340 341 342 343 344 345 346 347 348 349 350
{
    0x00000001, 0x00000002, 0x00000004, 0x00000008,
    0x00000010, 0x00000020, 0x00000040, 0x00000080,
    0x0000001B, 0x00000036
};

#else

/*
 * Forward S-box & tables
 */
static unsigned char FSb[256];
351 352 353 354
static uint32_t FT0[256]; 
static uint32_t FT1[256]; 
static uint32_t FT2[256]; 
static uint32_t FT3[256]; 
355 356 357 358 359

/*
 * Reverse S-box & tables
 */
static unsigned char RSb[256];
360 361 362 363
static uint32_t RT0[256];
static uint32_t RT1[256];
static uint32_t RT2[256];
static uint32_t RT3[256];
364 365 366 367

/*
 * Round constants
 */
368
static uint32_t RCON[10];
369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399

/*
 * Tables generation code
 */
#define ROTL8(x) ( ( x << 8 ) & 0xFFFFFFFF ) | ( x >> 24 )
#define XTIME(x) ( ( x << 1 ) ^ ( ( x & 0x80 ) ? 0x1B : 0x00 ) )
#define MUL(x,y) ( ( x && y ) ? pow[(log[x]+log[y]) % 255] : 0 )

static int aes_init_done = 0;

static void aes_gen_tables( void )
{
    int i, x, y, z;
    int pow[256];
    int log[256];

    /*
     * compute pow and log tables over GF(2^8)
     */
    for( i = 0, x = 1; i < 256; i++ )
    {
        pow[i] = x;
        log[x] = i;
        x = ( x ^ XTIME( x ) ) & 0xFF;
    }

    /*
     * calculate the round constants
     */
    for( i = 0, x = 1; i < 10; i++ )
    {
400
        RCON[i] = (uint32_t) x;
401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432
        x = XTIME( x ) & 0xFF;
    }

    /*
     * generate the forward and reverse S-boxes
     */
    FSb[0x00] = 0x63;
    RSb[0x63] = 0x00;

    for( i = 1; i < 256; i++ )
    {
        x = pow[255 - log[i]];

        y  = x; y = ( (y << 1) | (y >> 7) ) & 0xFF;
        x ^= y; y = ( (y << 1) | (y >> 7) ) & 0xFF;
        x ^= y; y = ( (y << 1) | (y >> 7) ) & 0xFF;
        x ^= y; y = ( (y << 1) | (y >> 7) ) & 0xFF;
        x ^= y ^ 0x63;

        FSb[i] = (unsigned char) x;
        RSb[x] = (unsigned char) i;
    }

    /*
     * generate the forward and reverse tables
     */
    for( i = 0; i < 256; i++ )
    {
        x = FSb[i];
        y = XTIME( x ) & 0xFF;
        z =  ( y ^ x ) & 0xFF;

433 434 435 436
        FT0[i] = ( (uint32_t) y       ) ^
                 ( (uint32_t) x <<  8 ) ^
                 ( (uint32_t) x << 16 ) ^
                 ( (uint32_t) z << 24 );
437 438 439 440 441 442 443

        FT1[i] = ROTL8( FT0[i] );
        FT2[i] = ROTL8( FT1[i] );
        FT3[i] = ROTL8( FT2[i] );

        x = RSb[i];

444 445 446 447
        RT0[i] = ( (uint32_t) MUL( 0x0E, x )       ) ^
                 ( (uint32_t) MUL( 0x09, x ) <<  8 ) ^
                 ( (uint32_t) MUL( 0x0D, x ) << 16 ) ^
                 ( (uint32_t) MUL( 0x0B, x ) << 24 );
448 449 450 451 452 453 454 455 456 457 458 459

        RT1[i] = ROTL8( RT0[i] );
        RT2[i] = ROTL8( RT1[i] );
        RT3[i] = ROTL8( RT2[i] );
    }
}

#endif

/*
 * AES key schedule (encryption)
 */
460
int aes_setkey_enc( aes_context *ctx, const unsigned char *key, unsigned int keysize )
461
{
462
    unsigned int i;
463
    uint32_t *RK;
464

465
#if !defined(POLARSSL_AES_ROM_TABLES)
466 467 468 469
    if( aes_init_done == 0 )
    {
        aes_gen_tables();
        aes_init_done = 1;
470

471 472 473 474 475 476 477 478
    }
#endif

    switch( keysize )
    {
        case 128: ctx->nr = 10; break;
        case 192: ctx->nr = 12; break;
        case 256: ctx->nr = 14; break;
479
        default : return( POLARSSL_ERR_AES_INVALID_KEY_LENGTH );
480 481
    }

482 483 484 485 486 487 488
#if defined(POLARSSL_PADLOCK_C) && defined(PADLOCK_ALIGN16)
    if( aes_padlock_ace == -1 )
        aes_padlock_ace = padlock_supports( PADLOCK_ACE );

    if( aes_padlock_ace )
        ctx->rk = RK = PADLOCK_ALIGN16( ctx->buf );
    else
489
#endif
490
    ctx->rk = RK = ctx->buf;
491

492 493
#if defined(POLARSSL_AESNI_C) && defined(POLARSSL_HAVE_X86_64)
    if( aesni_supports( POLARSSL_AESNI_AES ) )
494
        return( aesni_setkey_enc( (unsigned char *) ctx->rk, key, keysize ) );
495 496
#endif

497 498
    for( i = 0; i < (keysize >> 5); i++ )
    {
499
        GET_UINT32_LE( RK[i], key, i << 2 );
500 501 502 503 504 505 506 507 508
    }

    switch( ctx->nr )
    {
        case 10:

            for( i = 0; i < 10; i++, RK += 4 )
            {
                RK[4]  = RK[0] ^ RCON[i] ^
509 510 511 512
                ( (uint32_t) FSb[ ( RK[3] >>  8 ) & 0xFF ]       ) ^
                ( (uint32_t) FSb[ ( RK[3] >> 16 ) & 0xFF ] <<  8 ) ^
                ( (uint32_t) FSb[ ( RK[3] >> 24 ) & 0xFF ] << 16 ) ^
                ( (uint32_t) FSb[ ( RK[3]       ) & 0xFF ] << 24 );
513 514 515 516 517 518 519 520 521 522 523 524

                RK[5]  = RK[1] ^ RK[4];
                RK[6]  = RK[2] ^ RK[5];
                RK[7]  = RK[3] ^ RK[6];
            }
            break;

        case 12:

            for( i = 0; i < 8; i++, RK += 6 )
            {
                RK[6]  = RK[0] ^ RCON[i] ^
525 526 527 528
                ( (uint32_t) FSb[ ( RK[5] >>  8 ) & 0xFF ]       ) ^
                ( (uint32_t) FSb[ ( RK[5] >> 16 ) & 0xFF ] <<  8 ) ^
                ( (uint32_t) FSb[ ( RK[5] >> 24 ) & 0xFF ] << 16 ) ^
                ( (uint32_t) FSb[ ( RK[5]       ) & 0xFF ] << 24 );
529 530 531 532 533 534 535 536 537 538 539 540 541 542

                RK[7]  = RK[1] ^ RK[6];
                RK[8]  = RK[2] ^ RK[7];
                RK[9]  = RK[3] ^ RK[8];
                RK[10] = RK[4] ^ RK[9];
                RK[11] = RK[5] ^ RK[10];
            }
            break;

        case 14:

            for( i = 0; i < 7; i++, RK += 8 )
            {
                RK[8]  = RK[0] ^ RCON[i] ^
543 544 545 546
                ( (uint32_t) FSb[ ( RK[7] >>  8 ) & 0xFF ]       ) ^
                ( (uint32_t) FSb[ ( RK[7] >> 16 ) & 0xFF ] <<  8 ) ^
                ( (uint32_t) FSb[ ( RK[7] >> 24 ) & 0xFF ] << 16 ) ^
                ( (uint32_t) FSb[ ( RK[7]       ) & 0xFF ] << 24 );
547 548 549 550 551 552

                RK[9]  = RK[1] ^ RK[8];
                RK[10] = RK[2] ^ RK[9];
                RK[11] = RK[3] ^ RK[10];

                RK[12] = RK[4] ^
553 554 555 556
                ( (uint32_t) FSb[ ( RK[11]       ) & 0xFF ]       ) ^
                ( (uint32_t) FSb[ ( RK[11] >>  8 ) & 0xFF ] <<  8 ) ^
                ( (uint32_t) FSb[ ( RK[11] >> 16 ) & 0xFF ] << 16 ) ^
                ( (uint32_t) FSb[ ( RK[11] >> 24 ) & 0xFF ] << 24 );
557 558 559 560 561 562 563 564 565 566 567

                RK[13] = RK[5] ^ RK[12];
                RK[14] = RK[6] ^ RK[13];
                RK[15] = RK[7] ^ RK[14];
            }
            break;

        default:

            break;
    }
568 569

    return( 0 );
570 571 572 573 574
}

/*
 * AES key schedule (decryption)
 */
575
int aes_setkey_dec( aes_context *ctx, const unsigned char *key, unsigned int keysize )
576 577 578
{
    int i, j;
    aes_context cty;
579 580
    uint32_t *RK;
    uint32_t *SK;
581
    int ret;
582 583 584 585 586 587

    switch( keysize )
    {
        case 128: ctx->nr = 10; break;
        case 192: ctx->nr = 12; break;
        case 256: ctx->nr = 14; break;
588
        default : return( POLARSSL_ERR_AES_INVALID_KEY_LENGTH );
589 590
    }

591 592 593 594 595 596 597
#if defined(POLARSSL_PADLOCK_C) && defined(PADLOCK_ALIGN16)
    if( aes_padlock_ace == -1 )
        aes_padlock_ace = padlock_supports( PADLOCK_ACE );

    if( aes_padlock_ace )
        ctx->rk = RK = PADLOCK_ALIGN16( ctx->buf );
    else
598
#endif
599
    ctx->rk = RK = ctx->buf;
600

601 602 603 604
    ret = aes_setkey_enc( &cty, key, keysize );
    if( ret != 0 )
        return( ret );

605 606 607 608 609 610 611 612 613
#if defined(POLARSSL_AESNI_C) && defined(POLARSSL_HAVE_X86_64)
    if( aesni_supports( POLARSSL_AESNI_AES ) )
    {
        aesni_inverse_key( (unsigned char *) ctx->rk,
                           (const unsigned char *) cty.rk, ctx->nr );
        goto done;
    }
#endif

614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636
    SK = cty.rk + cty.nr * 4;

    *RK++ = *SK++;
    *RK++ = *SK++;
    *RK++ = *SK++;
    *RK++ = *SK++;

    for( i = ctx->nr - 1, SK -= 8; i > 0; i--, SK -= 8 )
    {
        for( j = 0; j < 4; j++, SK++ )
        {
            *RK++ = RT0[ FSb[ ( *SK       ) & 0xFF ] ] ^
                    RT1[ FSb[ ( *SK >>  8 ) & 0xFF ] ] ^
                    RT2[ FSb[ ( *SK >> 16 ) & 0xFF ] ] ^
                    RT3[ FSb[ ( *SK >> 24 ) & 0xFF ] ];
        }
    }

    *RK++ = *SK++;
    *RK++ = *SK++;
    *RK++ = *SK++;
    *RK++ = *SK++;

637
#if defined(POLARSSL_AESNI_C) && defined(POLARSSL_HAVE_X86_64)
638
done:
639
#endif
640
    memset( &cty, 0, sizeof( aes_context ) );
641 642

    return( 0 );
643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693
}

#define AES_FROUND(X0,X1,X2,X3,Y0,Y1,Y2,Y3)     \
{                                               \
    X0 = *RK++ ^ FT0[ ( Y0       ) & 0xFF ] ^   \
                 FT1[ ( Y1 >>  8 ) & 0xFF ] ^   \
                 FT2[ ( Y2 >> 16 ) & 0xFF ] ^   \
                 FT3[ ( Y3 >> 24 ) & 0xFF ];    \
                                                \
    X1 = *RK++ ^ FT0[ ( Y1       ) & 0xFF ] ^   \
                 FT1[ ( Y2 >>  8 ) & 0xFF ] ^   \
                 FT2[ ( Y3 >> 16 ) & 0xFF ] ^   \
                 FT3[ ( Y0 >> 24 ) & 0xFF ];    \
                                                \
    X2 = *RK++ ^ FT0[ ( Y2       ) & 0xFF ] ^   \
                 FT1[ ( Y3 >>  8 ) & 0xFF ] ^   \
                 FT2[ ( Y0 >> 16 ) & 0xFF ] ^   \
                 FT3[ ( Y1 >> 24 ) & 0xFF ];    \
                                                \
    X3 = *RK++ ^ FT0[ ( Y3       ) & 0xFF ] ^   \
                 FT1[ ( Y0 >>  8 ) & 0xFF ] ^   \
                 FT2[ ( Y1 >> 16 ) & 0xFF ] ^   \
                 FT3[ ( Y2 >> 24 ) & 0xFF ];    \
}

#define AES_RROUND(X0,X1,X2,X3,Y0,Y1,Y2,Y3)     \
{                                               \
    X0 = *RK++ ^ RT0[ ( Y0       ) & 0xFF ] ^   \
                 RT1[ ( Y3 >>  8 ) & 0xFF ] ^   \
                 RT2[ ( Y2 >> 16 ) & 0xFF ] ^   \
                 RT3[ ( Y1 >> 24 ) & 0xFF ];    \
                                                \
    X1 = *RK++ ^ RT0[ ( Y1       ) & 0xFF ] ^   \
                 RT1[ ( Y0 >>  8 ) & 0xFF ] ^   \
                 RT2[ ( Y3 >> 16 ) & 0xFF ] ^   \
                 RT3[ ( Y2 >> 24 ) & 0xFF ];    \
                                                \
    X2 = *RK++ ^ RT0[ ( Y2       ) & 0xFF ] ^   \
                 RT1[ ( Y1 >>  8 ) & 0xFF ] ^   \
                 RT2[ ( Y0 >> 16 ) & 0xFF ] ^   \
                 RT3[ ( Y3 >> 24 ) & 0xFF ];    \
                                                \
    X3 = *RK++ ^ RT0[ ( Y3       ) & 0xFF ] ^   \
                 RT1[ ( Y2 >>  8 ) & 0xFF ] ^   \
                 RT2[ ( Y1 >> 16 ) & 0xFF ] ^   \
                 RT3[ ( Y0 >> 24 ) & 0xFF ];    \
}

/*
 * AES-ECB block encryption/decryption
 */
694
int aes_crypt_ecb( aes_context *ctx,
695
                    int mode,
696
                    const unsigned char input[16],
697 698 699
                    unsigned char output[16] )
{
    int i;
700
    uint32_t *RK, X0, X1, X2, X3, Y0, Y1, Y2, Y3;
701

702
#if defined(POLARSSL_AESNI_C) && defined(POLARSSL_HAVE_X86_64)
703
    if( aesni_supports( POLARSSL_AESNI_AES ) )
704 705 706
        return( aesni_crypt_ecb( ctx, mode, input, output ) );
#endif

707
#if defined(POLARSSL_PADLOCK_C) && defined(POLARSSL_HAVE_X86)
708
    if( aes_padlock_ace )
709 710
    {
        if( padlock_xcryptecb( ctx, mode, input, output ) == 0 )
711 712 713 714 715
            return( 0 );

        // If padlock data misaligned, we just fall back to
        // unaccelerated mode
        //
716 717 718 719 720
    }
#endif

    RK = ctx->rk;

721 722 723 724
    GET_UINT32_LE( X0, input,  0 ); X0 ^= *RK++;
    GET_UINT32_LE( X1, input,  4 ); X1 ^= *RK++;
    GET_UINT32_LE( X2, input,  8 ); X2 ^= *RK++;
    GET_UINT32_LE( X3, input, 12 ); X3 ^= *RK++;
725 726 727 728 729 730 731 732 733 734 735 736

    if( mode == AES_DECRYPT )
    {
        for( i = (ctx->nr >> 1) - 1; i > 0; i-- )
        {
            AES_RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 );
            AES_RROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 );
        }

        AES_RROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 );

        X0 = *RK++ ^ \
737 738 739 740
                ( (uint32_t) RSb[ ( Y0       ) & 0xFF ]       ) ^
                ( (uint32_t) RSb[ ( Y3 >>  8 ) & 0xFF ] <<  8 ) ^
                ( (uint32_t) RSb[ ( Y2 >> 16 ) & 0xFF ] << 16 ) ^
                ( (uint32_t) RSb[ ( Y1 >> 24 ) & 0xFF ] << 24 );
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        X1 = *RK++ ^ \
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                ( (uint32_t) RSb[ ( Y1       ) & 0xFF ]       ) ^
                ( (uint32_t) RSb[ ( Y0 >>  8 ) & 0xFF ] <<  8 ) ^
                ( (uint32_t) RSb[ ( Y3 >> 16 ) & 0xFF ] << 16 ) ^
                ( (uint32_t) RSb[ ( Y2 >> 24 ) & 0xFF ] << 24 );
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        X2 = *RK++ ^ \
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                ( (uint32_t) RSb[ ( Y2       ) & 0xFF ]       ) ^
                ( (uint32_t) RSb[ ( Y1 >>  8 ) & 0xFF ] <<  8 ) ^
                ( (uint32_t) RSb[ ( Y0 >> 16 ) & 0xFF ] << 16 ) ^
                ( (uint32_t) RSb[ ( Y3 >> 24 ) & 0xFF ] << 24 );
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        X3 = *RK++ ^ \
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                ( (uint32_t) RSb[ ( Y3       ) & 0xFF ]       ) ^
                ( (uint32_t) RSb[ ( Y2 >>  8 ) & 0xFF ] <<  8 ) ^
                ( (uint32_t) RSb[ ( Y1 >> 16 ) & 0xFF ] << 16 ) ^
                ( (uint32_t) RSb[ ( Y0 >> 24 ) & 0xFF ] << 24 );
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    }
    else /* AES_ENCRYPT */
    {
        for( i = (ctx->nr >> 1) - 1; i > 0; i-- )
        {
            AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 );
            AES_FROUND( X0, X1, X2, X3, Y0, Y1, Y2, Y3 );
        }

        AES_FROUND( Y0, Y1, Y2, Y3, X0, X1, X2, X3 );

        X0 = *RK++ ^ \
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                ( (uint32_t) FSb[ ( Y0       ) & 0xFF ]       ) ^
                ( (uint32_t) FSb[ ( Y1 >>  8 ) & 0xFF ] <<  8 ) ^
                ( (uint32_t) FSb[ ( Y2 >> 16 ) & 0xFF ] << 16 ) ^
                ( (uint32_t) FSb[ ( Y3 >> 24 ) & 0xFF ] << 24 );
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        X1 = *RK++ ^ \
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                ( (uint32_t) FSb[ ( Y1       ) & 0xFF ]       ) ^
                ( (uint32_t) FSb[ ( Y2 >>  8 ) & 0xFF ] <<  8 ) ^
                ( (uint32_t) FSb[ ( Y3 >> 16 ) & 0xFF ] << 16 ) ^
                ( (uint32_t) FSb[ ( Y0 >> 24 ) & 0xFF ] << 24 );
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        X2 = *RK++ ^ \
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                ( (uint32_t) FSb[ ( Y2       ) & 0xFF ]       ) ^
                ( (uint32_t) FSb[ ( Y3 >>  8 ) & 0xFF ] <<  8 ) ^
                ( (uint32_t) FSb[ ( Y0 >> 16 ) & 0xFF ] << 16 ) ^
                ( (uint32_t) FSb[ ( Y1 >> 24 ) & 0xFF ] << 24 );
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        X3 = *RK++ ^ \
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                ( (uint32_t) FSb[ ( Y3       ) & 0xFF ]       ) ^
                ( (uint32_t) FSb[ ( Y0 >>  8 ) & 0xFF ] <<  8 ) ^
                ( (uint32_t) FSb[ ( Y1 >> 16 ) & 0xFF ] << 16 ) ^
                ( (uint32_t) FSb[ ( Y2 >> 24 ) & 0xFF ] << 24 );
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    }

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    PUT_UINT32_LE( X0, output,  0 );
    PUT_UINT32_LE( X1, output,  4 );
    PUT_UINT32_LE( X2, output,  8 );
    PUT_UINT32_LE( X3, output, 12 );
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    return( 0 );
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}

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#if defined(POLARSSL_CIPHER_MODE_CBC)
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/*
 * AES-CBC buffer encryption/decryption
 */
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int aes_crypt_cbc( aes_context *ctx,
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                    int mode,
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                    size_t length,
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                    unsigned char iv[16],
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                    const unsigned char *input,
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                    unsigned char *output )
{
    int i;
    unsigned char temp[16];

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    if( length % 16 )
        return( POLARSSL_ERR_AES_INVALID_INPUT_LENGTH );

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#if defined(POLARSSL_PADLOCK_C) && defined(POLARSSL_HAVE_X86)
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    if( aes_padlock_ace )
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    {
        if( padlock_xcryptcbc( ctx, mode, length, iv, input, output ) == 0 )
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            return( 0 );
        
        // If padlock data misaligned, we just fall back to
        // unaccelerated mode
        //
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    }
#endif

    if( mode == AES_DECRYPT )
    {
        while( length > 0 )
        {
            memcpy( temp, input, 16 );
            aes_crypt_ecb( ctx, mode, input, output );

            for( i = 0; i < 16; i++ )
                output[i] = (unsigned char)( output[i] ^ iv[i] );

            memcpy( iv, temp, 16 );

            input  += 16;
            output += 16;
            length -= 16;
        }
    }
    else
    {
        while( length > 0 )
        {
            for( i = 0; i < 16; i++ )
                output[i] = (unsigned char)( input[i] ^ iv[i] );

            aes_crypt_ecb( ctx, mode, output, output );
            memcpy( iv, output, 16 );

            input  += 16;
            output += 16;
            length -= 16;
        }
    }
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    return( 0 );
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}
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#endif /* POLARSSL_CIPHER_MODE_CBC */
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#if defined(POLARSSL_CIPHER_MODE_CFB)
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/*
 * AES-CFB128 buffer encryption/decryption
 */
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int aes_crypt_cfb128( aes_context *ctx,
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                       int mode,
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                       size_t length,
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                       size_t *iv_off,
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                       unsigned char iv[16],
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                       const unsigned char *input,
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                       unsigned char *output )
{
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    int c;
    size_t n = *iv_off;
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    if( mode == AES_DECRYPT )
    {
        while( length-- )
        {
            if( n == 0 )
                aes_crypt_ecb( ctx, AES_ENCRYPT, iv, iv );

            c = *input++;
            *output++ = (unsigned char)( c ^ iv[n] );
            iv[n] = (unsigned char) c;

            n = (n + 1) & 0x0F;
        }
    }
    else
    {
        while( length-- )
        {
            if( n == 0 )
                aes_crypt_ecb( ctx, AES_ENCRYPT, iv, iv );

            iv[n] = *output++ = (unsigned char)( iv[n] ^ *input++ );

            n = (n + 1) & 0x0F;
        }
    }

    *iv_off = n;
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    return( 0 );
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}
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/*
 * AES-CFB8 buffer encryption/decryption
 */
#include <stdio.h>
int aes_crypt_cfb8( aes_context *ctx,
                       int mode,
                       size_t length,
                       unsigned char iv[16],
                       const unsigned char *input,
                       unsigned char *output )
{
    unsigned char c;
    unsigned char ov[17];

    while( length-- )
    {
        memcpy(ov, iv, 16);
        aes_crypt_ecb( ctx, AES_ENCRYPT, iv, iv );

        if( mode == AES_DECRYPT )
            ov[16] = *input;

        c = *output++ = (unsigned char)( iv[0] ^ *input++ );

        if( mode == AES_ENCRYPT )
            ov[16] = c;

        memcpy(iv, ov + 1, 16);
    }

    return( 0 );
}
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#endif /*POLARSSL_CIPHER_MODE_CFB */

#if defined(POLARSSL_CIPHER_MODE_CTR)
/*
 * AES-CTR buffer encryption/decryption
 */
int aes_crypt_ctr( aes_context *ctx,
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                       size_t length,
                       size_t *nc_off,
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                       unsigned char nonce_counter[16],
                       unsigned char stream_block[16],
                       const unsigned char *input,
                       unsigned char *output )
{
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    int c, i;
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    size_t n = *nc_off;
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    while( length-- )
    {
        if( n == 0 ) {
            aes_crypt_ecb( ctx, AES_ENCRYPT, nonce_counter, stream_block );

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            for( i = 16; i > 0; i-- )
                if( ++nonce_counter[i - 1] != 0 )
                    break;
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        }
        c = *input++;
        *output++ = (unsigned char)( c ^ stream_block[n] );

        n = (n + 1) & 0x0F;
    }

    *nc_off = n;

    return( 0 );
}
#endif /* POLARSSL_CIPHER_MODE_CTR */
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#endif /* !POLARSSL_AES_ALT */
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#if defined(POLARSSL_SELF_TEST)
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#include <stdio.h>

/*
 * AES test vectors from:
 *
 * http://csrc.nist.gov/archive/aes/rijndael/rijndael-vals.zip
 */
static const unsigned char aes_test_ecb_dec[3][16] =
{
    { 0x44, 0x41, 0x6A, 0xC2, 0xD1, 0xF5, 0x3C, 0x58,
      0x33, 0x03, 0x91, 0x7E, 0x6B, 0xE9, 0xEB, 0xE0 },
    { 0x48, 0xE3, 0x1E, 0x9E, 0x25, 0x67, 0x18, 0xF2,
      0x92, 0x29, 0x31, 0x9C, 0x19, 0xF1, 0x5B, 0xA4 },
    { 0x05, 0x8C, 0xCF, 0xFD, 0xBB, 0xCB, 0x38, 0x2D,
      0x1F, 0x6F, 0x56, 0x58, 0x5D, 0x8A, 0x4A, 0xDE }
};

static const unsigned char aes_test_ecb_enc[3][16] =
{
    { 0xC3, 0x4C, 0x05, 0x2C, 0xC0, 0xDA, 0x8D, 0x73,
      0x45, 0x1A, 0xFE, 0x5F, 0x03, 0xBE, 0x29, 0x7F },
    { 0xF3, 0xF6, 0x75, 0x2A, 0xE8, 0xD7, 0x83, 0x11,
      0x38, 0xF0, 0x41, 0x56, 0x06, 0x31, 0xB1, 0x14 },
    { 0x8B, 0x79, 0xEE, 0xCC, 0x93, 0xA0, 0xEE, 0x5D,
      0xFF, 0x30, 0xB4, 0xEA, 0x21, 0x63, 0x6D, 0xA4 }
};

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#if defined(POLARSSL_CIPHER_MODE_CBC)
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static const unsigned char aes_test_cbc_dec[3][16] =
{
    { 0xFA, 0xCA, 0x37, 0xE0, 0xB0, 0xC8, 0x53, 0x73,
      0xDF, 0x70, 0x6E, 0x73, 0xF7, 0xC9, 0xAF, 0x86 },
    { 0x5D, 0xF6, 0x78, 0xDD, 0x17, 0xBA, 0x4E, 0x75,
      0xB6, 0x17, 0x68, 0xC6, 0xAD, 0xEF, 0x7C, 0x7B },
    { 0x48, 0x04, 0xE1, 0x81, 0x8F, 0xE6, 0x29, 0x75,
      0x19, 0xA3, 0xE8, 0x8C, 0x57, 0x31, 0x04, 0x13 }
};

static const unsigned char aes_test_cbc_enc[3][16] =
{
    { 0x8A, 0x05, 0xFC, 0x5E, 0x09, 0x5A, 0xF4, 0x84,
      0x8A, 0x08, 0xD3, 0x28, 0xD3, 0x68, 0x8E, 0x3D },
    { 0x7B, 0xD9, 0x66, 0xD5, 0x3A, 0xD8, 0xC1, 0xBB,
      0x85, 0xD2, 0xAD, 0xFA, 0xE8, 0x7B, 0xB1, 0x04 },
    { 0xFE, 0x3C, 0x53, 0x65, 0x3E, 0x2F, 0x45, 0xB5,
      0x6F, 0xCD, 0x88, 0xB2, 0xCC, 0x89, 0x8F, 0xF0 }
};
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#endif /* POLARSSL_CIPHER_MODE_CBC */
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#if defined(POLARSSL_CIPHER_MODE_CFB)
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/*
 * AES-CFB128 test vectors from:
 *
 * http://csrc.nist.gov/publications/nistpubs/800-38a/sp800-38a.pdf
 */
static const unsigned char aes_test_cfb128_key[3][32] =
{
    { 0x2B, 0x7E, 0x15, 0x16, 0x28, 0xAE, 0xD2, 0xA6,
      0xAB, 0xF7, 0x15, 0x88, 0x09, 0xCF, 0x4F, 0x3C },
    { 0x8E, 0x73, 0xB0, 0xF7, 0xDA, 0x0E, 0x64, 0x52,
      0xC8, 0x10, 0xF3, 0x2B, 0x80, 0x90, 0x79, 0xE5,
      0x62, 0xF8, 0xEA, 0xD2, 0x52, 0x2C, 0x6B, 0x7B },
    { 0x60, 0x3D, 0xEB, 0x10, 0x15, 0xCA, 0x71, 0xBE,
      0x2B, 0x73, 0xAE, 0xF0, 0x85, 0x7D, 0x77, 0x81,
      0x1F, 0x35, 0x2C, 0x07, 0x3B, 0x61, 0x08, 0xD7,
      0x2D, 0x98, 0x10, 0xA3, 0x09, 0x14, 0xDF, 0xF4 }
};

static const unsigned char aes_test_cfb128_iv[16] =
{
    0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
    0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F
};

static const unsigned char aes_test_cfb128_pt[64] =
{
    0x6B, 0xC1, 0xBE, 0xE2, 0x2E, 0x40, 0x9F, 0x96,
    0xE9, 0x3D, 0x7E, 0x11, 0x73, 0x93, 0x17, 0x2A,
    0xAE, 0x2D, 0x8A, 0x57, 0x1E, 0x03, 0xAC, 0x9C,
    0x9E, 0xB7, 0x6F, 0xAC, 0x45, 0xAF, 0x8E, 0x51,
    0x30, 0xC8, 0x1C, 0x46, 0xA3, 0x5C, 0xE4, 0x11,
    0xE5, 0xFB, 0xC1, 0x19, 0x1A, 0x0A, 0x52, 0xEF,
    0xF6, 0x9F, 0x24, 0x45, 0xDF, 0x4F, 0x9B, 0x17,
    0xAD, 0x2B, 0x41, 0x7B, 0xE6, 0x6C, 0x37, 0x10
};

static const unsigned char aes_test_cfb128_ct[3][64] =
{
    { 0x3B, 0x3F, 0xD9, 0x2E, 0xB7, 0x2D, 0xAD, 0x20,
      0x33, 0x34, 0x49, 0xF8, 0xE8, 0x3C, 0xFB, 0x4A,
      0xC8, 0xA6, 0x45, 0x37, 0xA0, 0xB3, 0xA9, 0x3F,
      0xCD, 0xE3, 0xCD, 0xAD, 0x9F, 0x1C, 0xE5, 0x8B,
      0x26, 0x75, 0x1F, 0x67, 0xA3, 0xCB, 0xB1, 0x40,
      0xB1, 0x80, 0x8C, 0xF1, 0x87, 0xA4, 0xF4, 0xDF,
      0xC0, 0x4B, 0x05, 0x35, 0x7C, 0x5D, 0x1C, 0x0E,
      0xEA, 0xC4, 0xC6, 0x6F, 0x9F, 0xF7, 0xF2, 0xE6 },
    { 0xCD, 0xC8, 0x0D, 0x6F, 0xDD, 0xF1, 0x8C, 0xAB,
      0x34, 0xC2, 0x59, 0x09, 0xC9, 0x9A, 0x41, 0x74,
      0x67, 0xCE, 0x7F, 0x7F, 0x81, 0x17, 0x36, 0x21,
      0x96, 0x1A, 0x2B, 0x70, 0x17, 0x1D, 0x3D, 0x7A,
      0x2E, 0x1E, 0x8A, 0x1D, 0xD5, 0x9B, 0x88, 0xB1,
      0xC8, 0xE6, 0x0F, 0xED, 0x1E, 0xFA, 0xC4, 0xC9,
      0xC0, 0x5F, 0x9F, 0x9C, 0xA9, 0x83, 0x4F, 0xA0,
      0x42, 0xAE, 0x8F, 0xBA, 0x58, 0x4B, 0x09, 0xFF },
    { 0xDC, 0x7E, 0x84, 0xBF, 0xDA, 0x79, 0x16, 0x4B,
      0x7E, 0xCD, 0x84, 0x86, 0x98, 0x5D, 0x38, 0x60,
      0x39, 0xFF, 0xED, 0x14, 0x3B, 0x28, 0xB1, 0xC8,
      0x32, 0x11, 0x3C, 0x63, 0x31, 0xE5, 0x40, 0x7B,
      0xDF, 0x10, 0x13, 0x24, 0x15, 0xE5, 0x4B, 0x92,
      0xA1, 0x3E, 0xD0, 0xA8, 0x26, 0x7A, 0xE2, 0xF9,
      0x75, 0xA3, 0x85, 0x74, 0x1A, 0xB9, 0xCE, 0xF8,
      0x20, 0x31, 0x62, 0x3D, 0x55, 0xB1, 0xE4, 0x71 }
};
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#endif /* POLARSSL_CIPHER_MODE_CFB */

#if defined(POLARSSL_CIPHER_MODE_CTR)
/*
 * AES-CTR test vectors from:
 *
 * http://www.faqs.org/rfcs/rfc3686.html
 */

static const unsigned char aes_test_ctr_key[3][16] =
{
    { 0xAE, 0x68, 0x52, 0xF8, 0x12, 0x10, 0x67, 0xCC,
      0x4B, 0xF7, 0xA5, 0x76, 0x55, 0x77, 0xF3, 0x9E },
    { 0x7E, 0x24, 0x06, 0x78, 0x17, 0xFA, 0xE0, 0xD7,
      0x43, 0xD6, 0xCE, 0x1F, 0x32, 0x53, 0x91, 0x63 },
    { 0x76, 0x91, 0xBE, 0x03, 0x5E, 0x50, 0x20, 0xA8,
      0xAC, 0x6E, 0x61, 0x85, 0x29, 0xF9, 0xA0, 0xDC }
};

static const unsigned char aes_test_ctr_nonce_counter[3][16] =
{
    { 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 },
    { 0x00, 0x6C, 0xB6, 0xDB, 0xC0, 0x54, 0x3B, 0x59,
      0xDA, 0x48, 0xD9, 0x0B, 0x00, 0x00, 0x00, 0x01 },
    { 0x00, 0xE0, 0x01, 0x7B, 0x27, 0x77, 0x7F, 0x3F,
      0x4A, 0x17, 0x86, 0xF0, 0x00, 0x00, 0x00, 0x01 }
};

static const unsigned char aes_test_ctr_pt[3][48] =
{
    { 0x53, 0x69, 0x6E, 0x67, 0x6C, 0x65, 0x20, 0x62,
      0x6C, 0x6F, 0x63, 0x6B, 0x20, 0x6D, 0x73, 0x67 },

    { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
      0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
      0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
      0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F },

    { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
      0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
      0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
      0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
      0x20, 0x21, 0x22, 0x23 }
};

static const unsigned char aes_test_ctr_ct[3][48] =
{
    { 0xE4, 0x09, 0x5D, 0x4F, 0xB7, 0xA7, 0xB3, 0x79,
      0x2D, 0x61, 0x75, 0xA3, 0x26, 0x13, 0x11, 0xB8 },
    { 0x51, 0x04, 0xA1, 0x06, 0x16, 0x8A, 0x72, 0xD9,
      0x79, 0x0D, 0x41, 0xEE, 0x8E, 0xDA, 0xD3, 0x88,
      0xEB, 0x2E, 0x1E, 0xFC, 0x46, 0xDA, 0x57, 0xC8,
      0xFC, 0xE6, 0x30, 0xDF, 0x91, 0x41, 0xBE, 0x28 },
    { 0xC1, 0xCF, 0x48, 0xA8, 0x9F, 0x2F, 0xFD, 0xD9,
      0xCF, 0x46, 0x52, 0xE9, 0xEF, 0xDB, 0x72, 0xD7,
      0x45, 0x40, 0xA4, 0x2B, 0xDE, 0x6D, 0x78, 0x36,
      0xD5, 0x9A, 0x5C, 0xEA, 0xAE, 0xF3, 0x10, 0x53,
      0x25, 0xB2, 0x07, 0x2F }
};

static const int aes_test_ctr_len[3] =
    { 16, 32, 36 };
#endif /* POLARSSL_CIPHER_MODE_CTR */
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/*
 * Checkup routine
 */
int aes_self_test( int verbose )
{
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    int i, j, u, v;
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    unsigned char key[32];
    unsigned char buf[64];
    unsigned char iv[16];
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#if defined(POLARSSL_CIPHER_MODE_CBC)
    unsigned char prv[16];
#endif
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#if defined(POLARSSL_CIPHER_MODE_CTR) || defined(POLARSSL_CIPHER_MODE_CFB)
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    size_t offset;
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#endif
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#if defined(POLARSSL_CIPHER_MODE_CTR)
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    int len;
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    unsigned char nonce_counter[16];
    unsigned char stream_block[16];
#endif
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    aes_context ctx;

    memset( key, 0, 32 );

    /*
     * ECB mode
     */
    for( i = 0; i < 6; i++ )
    {
        u = i >> 1;
        v = i  & 1;

        if( verbose != 0 )
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            polarssl_printf( "  AES-ECB-%3d (%s): ", 128 + u * 64,
                             ( v == AES_DECRYPT ) ? "dec" : "enc" );
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        memset( buf, 0, 16 );

        if( v == AES_DECRYPT )
        {
            aes_setkey_dec( &ctx, key, 128 + u * 64 );

            for( j = 0; j < 10000; j++ )
                aes_crypt_ecb( &ctx, v, buf, buf );

            if( memcmp( buf, aes_test_ecb_dec[u], 16 ) != 0 )
            {
                if( verbose != 0 )
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                    polarssl_printf( "failed\n" );
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                return( 1 );
            }
        }
        else
        {
            aes_setkey_enc( &ctx, key, 128 + u * 64 );

            for( j = 0; j < 10000; j++ )
                aes_crypt_ecb( &ctx, v, buf, buf );

            if( memcmp( buf, aes_test_ecb_enc[u], 16 ) != 0 )
            {
                if( verbose != 0 )
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                    polarssl_printf( "failed\n" );
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                return( 1 );
            }
        }

        if( verbose != 0 )
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            polarssl_printf( "passed\n" );
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    }

    if( verbose != 0 )
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        polarssl_printf( "\n" );
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#if defined(POLARSSL_CIPHER_MODE_CBC)
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    /*
     * CBC mode
     */
    for( i = 0; i < 6; i++ )
    {
        u = i >> 1;
        v = i  & 1;

        if( verbose != 0 )
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            polarssl_printf( "  AES-CBC-%3d (%s): ", 128 + u * 64,
                             ( v == AES_DECRYPT ) ? "dec" : "enc" );
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        memset( iv , 0, 16 );
        memset( prv, 0, 16 );
        memset( buf, 0, 16 );

        if( v == AES_DECRYPT )
        {
            aes_setkey_dec( &ctx, key, 128 + u * 64 );

            for( j = 0; j < 10000; j++ )
                aes_crypt_cbc( &ctx, v, 16, iv, buf, buf );

            if( memcmp( buf, aes_test_cbc_dec[u], 16 ) != 0 )
            {
                if( verbose != 0 )
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                    polarssl_printf( "failed\n" );
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                return( 1 );
            }
        }
        else
        {
            aes_setkey_enc( &ctx, key, 128 + u * 64 );

            for( j = 0; j < 10000; j++ )
            {
                unsigned char tmp[16];

                aes_crypt_cbc( &ctx, v, 16, iv, buf, buf );

                memcpy( tmp, prv, 16 );
                memcpy( prv, buf, 16 );
                memcpy( buf, tmp, 16 );
            }

            if( memcmp( prv, aes_test_cbc_enc[u], 16 ) != 0 )
            {
                if( verbose != 0 )
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                    polarssl_printf( "failed\n" );
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                return( 1 );
            }
        }

        if( verbose != 0 )
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            polarssl_printf( "passed\n" );
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    }

    if( verbose != 0 )
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        polarssl_printf( "\n" );
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#endif /* POLARSSL_CIPHER_MODE_CBC */
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#if defined(POLARSSL_CIPHER_MODE_CFB)
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    /*
     * CFB128 mode
     */
    for( i = 0; i < 6; i++ )
    {
        u = i >> 1;
        v = i  & 1;

        if( verbose != 0 )
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            polarssl_printf( "  AES-CFB128-%3d (%s): ", 128 + u * 64,
                             ( v == AES_DECRYPT ) ? "dec" : "enc" );
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        memcpy( iv,  aes_test_cfb128_iv, 16 );
        memcpy( key, aes_test_cfb128_key[u], 16 + u * 8 );

        offset = 0;
        aes_setkey_enc( &ctx, key, 128 + u * 64 );

        if( v == AES_DECRYPT )
        {
            memcpy( buf, aes_test_cfb128_ct[u], 64 );
            aes_crypt_cfb128( &ctx, v, 64, &offset, iv, buf, buf );

            if( memcmp( buf, aes_test_cfb128_pt, 64 ) != 0 )
            {
                if( verbose != 0 )
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                    polarssl_printf