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Diffstat (limited to 'src/aes_prng.c')
| -rw-r--r-- | src/aes_prng.c | 1048 |
1 files changed, 1048 insertions, 0 deletions
diff --git a/src/aes_prng.c b/src/aes_prng.c new file mode 100644 index 00000000..4d9963f0 --- /dev/null +++ b/src/aes_prng.c @@ -0,0 +1,1048 @@ +// Emacs style mode select -*- C++ -*- +//----------------------------------------------------------------------------- +// +// Copyright(C) 2012 Simon Howard +// +// 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., 59 Temple Place - Suite 330, Boston, MA +// 02111-1307, USA. +// +//----------------------------------------------------------------------------- +// +// This implements a cryptographically secure pseudorandom number +// generator for implementing secure demos. The approach taken is to +// use the AES (Rijndael) stream cipher in "counter" mode, encrypting +// an incrementing counter. The cipher key acts as the random seed. +// Cryptanalysis of AES used in this way has shown it to be an +// effective PRNG (see: Empirical Evidence concerning AES, Hellekalek +// & Wegenkittl, 2003). +// +// The AES implementation is from GnuPG. Original copyright notice is +// below. +// +//----------------------------------------------------------------------------- + +/* Rijndael (AES) for GnuPG + * Copyright (C) 2000, 2001, 2008 Free Software Foundation, Inc. + * + * This file is part of GnuPG. + * + * GnuPG is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * GnuPG is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. + ******************************************************************* + * The code here is based on the optimized implementation taken from + * http://www.esat.kuleuven.ac.be/~rijmen/rijndael/ on Oct 2, 2000, + * which carries this notice: + *------------------------------------------ + * rijndael-alg-fst.c v2.3 April '2000 + * + * Optimised ANSI C code + * + * authors: v1.0: Antoon Bosselaers + * v2.0: Vincent Rijmen + * v2.3: Paulo Barreto + * + * This code is placed in the public domain. + *------------------------------------------ + */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> /* for memcmp() */ + +#include "aes_prng.h" +#include "doomtype.h" +#include "i_system.h" + +#define MAXKC (256/32) +#define MAXROUNDS 14 + + +typedef struct +{ + int ROUNDS; /* key-length-dependent number of rounds */ + uint32_t keySched[MAXROUNDS+1][4]; /* key schedule */ +} RIJNDAEL_context; + +static const byte S[256] = +{ + 99, 124, 119, 123, 242, 107, 111, 197, + 48, 1, 103, 43, 254, 215, 171, 118, + 202, 130, 201, 125, 250, 89, 71, 240, + 173, 212, 162, 175, 156, 164, 114, 192, + 183, 253, 147, 38, 54, 63, 247, 204, + 52, 165, 229, 241, 113, 216, 49, 21, + 4, 199, 35, 195, 24, 150, 5, 154, + 7, 18, 128, 226, 235, 39, 178, 117, + 9, 131, 44, 26, 27, 110, 90, 160, + 82, 59, 214, 179, 41, 227, 47, 132, + 83, 209, 0, 237, 32, 252, 177, 91, + 106, 203, 190, 57, 74, 76, 88, 207, + 208, 239, 170, 251, 67, 77, 51, 133, + 69, 249, 2, 127, 80, 60, 159, 168, + 81, 163, 64, 143, 146, 157, 56, 245, + 188, 182, 218, 33, 16, 255, 243, 210, + 205, 12, 19, 236, 95, 151, 68, 23, + 196, 167, 126, 61, 100, 93, 25, 115, + 96, 129, 79, 220, 34, 42, 144, 136, + 70, 238, 184, 20, 222, 94, 11, 219, + 224, 50, 58, 10, 73, 6, 36, 92, + 194, 211, 172, 98, 145, 149, 228, 121, + 231, 200, 55, 109, 141, 213, 78, 169, + 108, 86, 244, 234, 101, 122, 174, 8, + 186, 120, 37, 46, 28, 166, 180, 198, + 232, 221, 116, 31, 75, 189, 139, 138, + 112, 62, 181, 102, 72, 3, 246, 14, + 97, 53, 87, 185, 134, 193, 29, 158, + 225, 248, 152, 17, 105, 217, 142, 148, + 155, 30, 135, 233, 206, 85, 40, 223, + 140, 161, 137, 13, 191, 230, 66, 104, + 65, 153, 45, 15, 176, 84, 187, 22 +}; + + +static const byte T1[256][4] = +{ + { 0xc6,0x63,0x63,0xa5 }, { 0xf8,0x7c,0x7c,0x84 }, + { 0xee,0x77,0x77,0x99 }, { 0xf6,0x7b,0x7b,0x8d }, + { 0xff,0xf2,0xf2,0x0d }, { 0xd6,0x6b,0x6b,0xbd }, + { 0xde,0x6f,0x6f,0xb1 }, { 0x91,0xc5,0xc5,0x54 }, + { 0x60,0x30,0x30,0x50 }, { 0x02,0x01,0x01,0x03 }, + { 0xce,0x67,0x67,0xa9 }, { 0x56,0x2b,0x2b,0x7d }, + { 0xe7,0xfe,0xfe,0x19 }, { 0xb5,0xd7,0xd7,0x62 }, + { 0x4d,0xab,0xab,0xe6 }, { 0xec,0x76,0x76,0x9a }, + { 0x8f,0xca,0xca,0x45 }, { 0x1f,0x82,0x82,0x9d }, + { 0x89,0xc9,0xc9,0x40 }, { 0xfa,0x7d,0x7d,0x87 }, + { 0xef,0xfa,0xfa,0x15 }, { 0xb2,0x59,0x59,0xeb }, + { 0x8e,0x47,0x47,0xc9 }, { 0xfb,0xf0,0xf0,0x0b }, + { 0x41,0xad,0xad,0xec }, { 0xb3,0xd4,0xd4,0x67 }, + { 0x5f,0xa2,0xa2,0xfd }, { 0x45,0xaf,0xaf,0xea }, + { 0x23,0x9c,0x9c,0xbf }, { 0x53,0xa4,0xa4,0xf7 }, + { 0xe4,0x72,0x72,0x96 }, { 0x9b,0xc0,0xc0,0x5b }, + { 0x75,0xb7,0xb7,0xc2 }, { 0xe1,0xfd,0xfd,0x1c }, + { 0x3d,0x93,0x93,0xae }, { 0x4c,0x26,0x26,0x6a }, + { 0x6c,0x36,0x36,0x5a }, { 0x7e,0x3f,0x3f,0x41 }, + { 0xf5,0xf7,0xf7,0x02 }, { 0x83,0xcc,0xcc,0x4f }, + { 0x68,0x34,0x34,0x5c }, { 0x51,0xa5,0xa5,0xf4 }, + { 0xd1,0xe5,0xe5,0x34 }, { 0xf9,0xf1,0xf1,0x08 }, + { 0xe2,0x71,0x71,0x93 }, { 0xab,0xd8,0xd8,0x73 }, + { 0x62,0x31,0x31,0x53 }, { 0x2a,0x15,0x15,0x3f }, + { 0x08,0x04,0x04,0x0c }, { 0x95,0xc7,0xc7,0x52 }, + { 0x46,0x23,0x23,0x65 }, { 0x9d,0xc3,0xc3,0x5e }, + { 0x30,0x18,0x18,0x28 }, { 0x37,0x96,0x96,0xa1 }, + { 0x0a,0x05,0x05,0x0f }, { 0x2f,0x9a,0x9a,0xb5 }, + { 0x0e,0x07,0x07,0x09 }, { 0x24,0x12,0x12,0x36 }, + { 0x1b,0x80,0x80,0x9b }, { 0xdf,0xe2,0xe2,0x3d }, + { 0xcd,0xeb,0xeb,0x26 }, { 0x4e,0x27,0x27,0x69 }, + { 0x7f,0xb2,0xb2,0xcd }, { 0xea,0x75,0x75,0x9f }, + { 0x12,0x09,0x09,0x1b }, { 0x1d,0x83,0x83,0x9e }, + { 0x58,0x2c,0x2c,0x74 }, { 0x34,0x1a,0x1a,0x2e }, + { 0x36,0x1b,0x1b,0x2d }, { 0xdc,0x6e,0x6e,0xb2 }, + { 0xb4,0x5a,0x5a,0xee }, { 0x5b,0xa0,0xa0,0xfb }, + { 0xa4,0x52,0x52,0xf6 }, { 0x76,0x3b,0x3b,0x4d }, + { 0xb7,0xd6,0xd6,0x61 }, { 0x7d,0xb3,0xb3,0xce }, + { 0x52,0x29,0x29,0x7b }, { 0xdd,0xe3,0xe3,0x3e }, + { 0x5e,0x2f,0x2f,0x71 }, { 0x13,0x84,0x84,0x97 }, + { 0xa6,0x53,0x53,0xf5 }, { 0xb9,0xd1,0xd1,0x68 }, + { 0x00,0x00,0x00,0x00 }, { 0xc1,0xed,0xed,0x2c }, + { 0x40,0x20,0x20,0x60 }, { 0xe3,0xfc,0xfc,0x1f }, + { 0x79,0xb1,0xb1,0xc8 }, { 0xb6,0x5b,0x5b,0xed }, + { 0xd4,0x6a,0x6a,0xbe }, { 0x8d,0xcb,0xcb,0x46 }, + { 0x67,0xbe,0xbe,0xd9 }, { 0x72,0x39,0x39,0x4b }, + { 0x94,0x4a,0x4a,0xde }, { 0x98,0x4c,0x4c,0xd4 }, + { 0xb0,0x58,0x58,0xe8 }, { 0x85,0xcf,0xcf,0x4a }, + { 0xbb,0xd0,0xd0,0x6b }, { 0xc5,0xef,0xef,0x2a }, + { 0x4f,0xaa,0xaa,0xe5 }, { 0xed,0xfb,0xfb,0x16 }, + { 0x86,0x43,0x43,0xc5 }, { 0x9a,0x4d,0x4d,0xd7 }, + { 0x66,0x33,0x33,0x55 }, { 0x11,0x85,0x85,0x94 }, + { 0x8a,0x45,0x45,0xcf }, { 0xe9,0xf9,0xf9,0x10 }, + { 0x04,0x02,0x02,0x06 }, { 0xfe,0x7f,0x7f,0x81 }, + { 0xa0,0x50,0x50,0xf0 }, { 0x78,0x3c,0x3c,0x44 }, + { 0x25,0x9f,0x9f,0xba }, { 0x4b,0xa8,0xa8,0xe3 }, + { 0xa2,0x51,0x51,0xf3 }, { 0x5d,0xa3,0xa3,0xfe }, + { 0x80,0x40,0x40,0xc0 }, { 0x05,0x8f,0x8f,0x8a }, + { 0x3f,0x92,0x92,0xad }, { 0x21,0x9d,0x9d,0xbc }, + { 0x70,0x38,0x38,0x48 }, { 0xf1,0xf5,0xf5,0x04 }, + { 0x63,0xbc,0xbc,0xdf }, { 0x77,0xb6,0xb6,0xc1 }, + { 0xaf,0xda,0xda,0x75 }, { 0x42,0x21,0x21,0x63 }, + { 0x20,0x10,0x10,0x30 }, { 0xe5,0xff,0xff,0x1a }, + { 0xfd,0xf3,0xf3,0x0e }, { 0xbf,0xd2,0xd2,0x6d }, + { 0x81,0xcd,0xcd,0x4c }, { 0x18,0x0c,0x0c,0x14 }, + { 0x26,0x13,0x13,0x35 }, { 0xc3,0xec,0xec,0x2f }, + { 0xbe,0x5f,0x5f,0xe1 }, { 0x35,0x97,0x97,0xa2 }, + { 0x88,0x44,0x44,0xcc }, { 0x2e,0x17,0x17,0x39 }, + { 0x93,0xc4,0xc4,0x57 }, { 0x55,0xa7,0xa7,0xf2 }, + { 0xfc,0x7e,0x7e,0x82 }, { 0x7a,0x3d,0x3d,0x47 }, + { 0xc8,0x64,0x64,0xac }, { 0xba,0x5d,0x5d,0xe7 }, + { 0x32,0x19,0x19,0x2b }, { 0xe6,0x73,0x73,0x95 }, + { 0xc0,0x60,0x60,0xa0 }, { 0x19,0x81,0x81,0x98 }, + { 0x9e,0x4f,0x4f,0xd1 }, { 0xa3,0xdc,0xdc,0x7f }, + { 0x44,0x22,0x22,0x66 }, { 0x54,0x2a,0x2a,0x7e }, + { 0x3b,0x90,0x90,0xab }, { 0x0b,0x88,0x88,0x83 }, + { 0x8c,0x46,0x46,0xca }, { 0xc7,0xee,0xee,0x29 }, + { 0x6b,0xb8,0xb8,0xd3 }, { 0x28,0x14,0x14,0x3c }, + { 0xa7,0xde,0xde,0x79 }, { 0xbc,0x5e,0x5e,0xe2 }, + { 0x16,0x0b,0x0b,0x1d }, { 0xad,0xdb,0xdb,0x76 }, + { 0xdb,0xe0,0xe0,0x3b }, { 0x64,0x32,0x32,0x56 }, + { 0x74,0x3a,0x3a,0x4e }, { 0x14,0x0a,0x0a,0x1e }, + { 0x92,0x49,0x49,0xdb }, { 0x0c,0x06,0x06,0x0a }, + { 0x48,0x24,0x24,0x6c }, { 0xb8,0x5c,0x5c,0xe4 }, + { 0x9f,0xc2,0xc2,0x5d }, { 0xbd,0xd3,0xd3,0x6e }, + { 0x43,0xac,0xac,0xef }, { 0xc4,0x62,0x62,0xa6 }, + { 0x39,0x91,0x91,0xa8 }, { 0x31,0x95,0x95,0xa4 }, + { 0xd3,0xe4,0xe4,0x37 }, { 0xf2,0x79,0x79,0x8b }, + { 0xd5,0xe7,0xe7,0x32 }, { 0x8b,0xc8,0xc8,0x43 }, + { 0x6e,0x37,0x37,0x59 }, { 0xda,0x6d,0x6d,0xb7 }, + { 0x01,0x8d,0x8d,0x8c }, { 0xb1,0xd5,0xd5,0x64 }, + { 0x9c,0x4e,0x4e,0xd2 }, { 0x49,0xa9,0xa9,0xe0 }, + { 0xd8,0x6c,0x6c,0xb4 }, { 0xac,0x56,0x56,0xfa }, + { 0xf3,0xf4,0xf4,0x07 }, { 0xcf,0xea,0xea,0x25 }, + { 0xca,0x65,0x65,0xaf }, { 0xf4,0x7a,0x7a,0x8e }, + { 0x47,0xae,0xae,0xe9 }, { 0x10,0x08,0x08,0x18 }, + { 0x6f,0xba,0xba,0xd5 }, { 0xf0,0x78,0x78,0x88 }, + { 0x4a,0x25,0x25,0x6f }, { 0x5c,0x2e,0x2e,0x72 }, + { 0x38,0x1c,0x1c,0x24 }, { 0x57,0xa6,0xa6,0xf1 }, + { 0x73,0xb4,0xb4,0xc7 }, { 0x97,0xc6,0xc6,0x51 }, + { 0xcb,0xe8,0xe8,0x23 }, { 0xa1,0xdd,0xdd,0x7c }, + { 0xe8,0x74,0x74,0x9c }, { 0x3e,0x1f,0x1f,0x21 }, + { 0x96,0x4b,0x4b,0xdd }, { 0x61,0xbd,0xbd,0xdc }, + { 0x0d,0x8b,0x8b,0x86 }, { 0x0f,0x8a,0x8a,0x85 }, + { 0xe0,0x70,0x70,0x90 }, { 0x7c,0x3e,0x3e,0x42 }, + { 0x71,0xb5,0xb5,0xc4 }, { 0xcc,0x66,0x66,0xaa }, + { 0x90,0x48,0x48,0xd8 }, { 0x06,0x03,0x03,0x05 }, + { 0xf7,0xf6,0xf6,0x01 }, { 0x1c,0x0e,0x0e,0x12 }, + { 0xc2,0x61,0x61,0xa3 }, { 0x6a,0x35,0x35,0x5f }, + { 0xae,0x57,0x57,0xf9 }, { 0x69,0xb9,0xb9,0xd0 }, + { 0x17,0x86,0x86,0x91 }, { 0x99,0xc1,0xc1,0x58 }, + { 0x3a,0x1d,0x1d,0x27 }, { 0x27,0x9e,0x9e,0xb9 }, + { 0xd9,0xe1,0xe1,0x38 }, { 0xeb,0xf8,0xf8,0x13 }, + { 0x2b,0x98,0x98,0xb3 }, { 0x22,0x11,0x11,0x33 }, + { 0xd2,0x69,0x69,0xbb }, { 0xa9,0xd9,0xd9,0x70 }, + { 0x07,0x8e,0x8e,0x89 }, { 0x33,0x94,0x94,0xa7 }, + { 0x2d,0x9b,0x9b,0xb6 }, { 0x3c,0x1e,0x1e,0x22 }, + { 0x15,0x87,0x87,0x92 }, { 0xc9,0xe9,0xe9,0x20 }, + { 0x87,0xce,0xce,0x49 }, { 0xaa,0x55,0x55,0xff }, + { 0x50,0x28,0x28,0x78 }, { 0xa5,0xdf,0xdf,0x7a }, + { 0x03,0x8c,0x8c,0x8f }, { 0x59,0xa1,0xa1,0xf8 }, + { 0x09,0x89,0x89,0x80 }, { 0x1a,0x0d,0x0d,0x17 }, + { 0x65,0xbf,0xbf,0xda }, { 0xd7,0xe6,0xe6,0x31 }, + { 0x84,0x42,0x42,0xc6 }, { 0xd0,0x68,0x68,0xb8 }, + { 0x82,0x41,0x41,0xc3 }, { 0x29,0x99,0x99,0xb0 }, + { 0x5a,0x2d,0x2d,0x77 }, { 0x1e,0x0f,0x0f,0x11 }, + { 0x7b,0xb0,0xb0,0xcb }, { 0xa8,0x54,0x54,0xfc }, + { 0x6d,0xbb,0xbb,0xd6 }, { 0x2c,0x16,0x16,0x3a } +}; + +static const byte T2[256][4] = +{ + { 0xa5,0xc6,0x63,0x63 }, { 0x84,0xf8,0x7c,0x7c }, + { 0x99,0xee,0x77,0x77 }, { 0x8d,0xf6,0x7b,0x7b }, + { 0x0d,0xff,0xf2,0xf2 }, { 0xbd,0xd6,0x6b,0x6b }, + { 0xb1,0xde,0x6f,0x6f }, { 0x54,0x91,0xc5,0xc5 }, + { 0x50,0x60,0x30,0x30 }, { 0x03,0x02,0x01,0x01 }, + { 0xa9,0xce,0x67,0x67 }, { 0x7d,0x56,0x2b,0x2b }, + { 0x19,0xe7,0xfe,0xfe }, { 0x62,0xb5,0xd7,0xd7 }, + { 0xe6,0x4d,0xab,0xab }, { 0x9a,0xec,0x76,0x76 }, + { 0x45,0x8f,0xca,0xca }, { 0x9d,0x1f,0x82,0x82 }, + { 0x40,0x89,0xc9,0xc9 }, { 0x87,0xfa,0x7d,0x7d }, + { 0x15,0xef,0xfa,0xfa }, { 0xeb,0xb2,0x59,0x59 }, + { 0xc9,0x8e,0x47,0x47 }, { 0x0b,0xfb,0xf0,0xf0 }, + { 0xec,0x41,0xad,0xad }, { 0x67,0xb3,0xd4,0xd4 }, + { 0xfd,0x5f,0xa2,0xa2 }, { 0xea,0x45,0xaf,0xaf }, + { 0xbf,0x23,0x9c,0x9c }, { 0xf7,0x53,0xa4,0xa4 }, + { 0x96,0xe4,0x72,0x72 }, { 0x5b,0x9b,0xc0,0xc0 }, + { 0xc2,0x75,0xb7,0xb7 }, { 0x1c,0xe1,0xfd,0xfd }, + { 0xae,0x3d,0x93,0x93 }, { 0x6a,0x4c,0x26,0x26 }, + { 0x5a,0x6c,0x36,0x36 }, { 0x41,0x7e,0x3f,0x3f }, + { 0x02,0xf5,0xf7,0xf7 }, { 0x4f,0x83,0xcc,0xcc }, + { 0x5c,0x68,0x34,0x34 }, { 0xf4,0x51,0xa5,0xa5 }, + { 0x34,0xd1,0xe5,0xe5 }, { 0x08,0xf9,0xf1,0xf1 }, + { 0x93,0xe2,0x71,0x71 }, { 0x73,0xab,0xd8,0xd8 }, + { 0x53,0x62,0x31,0x31 }, { 0x3f,0x2a,0x15,0x15 }, + { 0x0c,0x08,0x04,0x04 }, { 0x52,0x95,0xc7,0xc7 }, + { 0x65,0x46,0x23,0x23 }, { 0x5e,0x9d,0xc3,0xc3 }, + { 0x28,0x30,0x18,0x18 }, { 0xa1,0x37,0x96,0x96 }, + { 0x0f,0x0a,0x05,0x05 }, { 0xb5,0x2f,0x9a,0x9a }, + { 0x09,0x0e,0x07,0x07 }, { 0x36,0x24,0x12,0x12 }, + { 0x9b,0x1b,0x80,0x80 }, { 0x3d,0xdf,0xe2,0xe2 }, + { 0x26,0xcd,0xeb,0xeb }, { 0x69,0x4e,0x27,0x27 }, + { 0xcd,0x7f,0xb2,0xb2 }, { 0x9f,0xea,0x75,0x75 }, + { 0x1b,0x12,0x09,0x09 }, { 0x9e,0x1d,0x83,0x83 }, + { 0x74,0x58,0x2c,0x2c }, { 0x2e,0x34,0x1a,0x1a }, + { 0x2d,0x36,0x1b,0x1b }, { 0xb2,0xdc,0x6e,0x6e }, + { 0xee,0xb4,0x5a,0x5a }, { 0xfb,0x5b,0xa0,0xa0 }, + { 0xf6,0xa4,0x52,0x52 }, { 0x4d,0x76,0x3b,0x3b }, + { 0x61,0xb7,0xd6,0xd6 }, { 0xce,0x7d,0xb3,0xb3 }, + { 0x7b,0x52,0x29,0x29 }, { 0x3e,0xdd,0xe3,0xe3 }, + { 0x71,0x5e,0x2f,0x2f }, { 0x97,0x13,0x84,0x84 }, + { 0xf5,0xa6,0x53,0x53 }, { 0x68,0xb9,0xd1,0xd1 }, + { 0x00,0x00,0x00,0x00 }, { 0x2c,0xc1,0xed,0xed }, + { 0x60,0x40,0x20,0x20 }, { 0x1f,0xe3,0xfc,0xfc }, + { 0xc8,0x79,0xb1,0xb1 }, { 0xed,0xb6,0x5b,0x5b }, + { 0xbe,0xd4,0x6a,0x6a }, { 0x46,0x8d,0xcb,0xcb }, + { 0xd9,0x67,0xbe,0xbe }, { 0x4b,0x72,0x39,0x39 }, + { 0xde,0x94,0x4a,0x4a }, { 0xd4,0x98,0x4c,0x4c }, + { 0xe8,0xb0,0x58,0x58 }, { 0x4a,0x85,0xcf,0xcf }, + { 0x6b,0xbb,0xd0,0xd0 }, { 0x2a,0xc5,0xef,0xef }, + { 0xe5,0x4f,0xaa,0xaa }, { 0x16,0xed,0xfb,0xfb }, + { 0xc5,0x86,0x43,0x43 }, { 0xd7,0x9a,0x4d,0x4d }, + { 0x55,0x66,0x33,0x33 }, { 0x94,0x11,0x85,0x85 }, + { 0xcf,0x8a,0x45,0x45 }, { 0x10,0xe9,0xf9,0xf9 }, + { 0x06,0x04,0x02,0x02 }, { 0x81,0xfe,0x7f,0x7f }, + { 0xf0,0xa0,0x50,0x50 }, { 0x44,0x78,0x3c,0x3c }, + { 0xba,0x25,0x9f,0x9f }, { 0xe3,0x4b,0xa8,0xa8 }, + { 0xf3,0xa2,0x51,0x51 }, { 0xfe,0x5d,0xa3,0xa3 }, + { 0xc0,0x80,0x40,0x40 }, { 0x8a,0x05,0x8f,0x8f }, + { 0xad,0x3f,0x92,0x92 }, { 0xbc,0x21,0x9d,0x9d }, + { 0x48,0x70,0x38,0x38 }, { 0x04,0xf1,0xf5,0xf5 }, + { 0xdf,0x63,0xbc,0xbc }, { 0xc1,0x77,0xb6,0xb6 }, + { 0x75,0xaf,0xda,0xda }, { 0x63,0x42,0x21,0x21 }, + { 0x30,0x20,0x10,0x10 }, { 0x1a,0xe5,0xff,0xff }, + { 0x0e,0xfd,0xf3,0xf3 }, { 0x6d,0xbf,0xd2,0xd2 }, + { 0x4c,0x81,0xcd,0xcd }, { 0x14,0x18,0x0c,0x0c }, + { 0x35,0x26,0x13,0x13 }, { 0x2f,0xc3,0xec,0xec }, + { 0xe1,0xbe,0x5f,0x5f }, { 0xa2,0x35,0x97,0x97 }, + { 0xcc,0x88,0x44,0x44 }, { 0x39,0x2e,0x17,0x17 }, + { 0x57,0x93,0xc4,0xc4 }, { 0xf2,0x55,0xa7,0xa7 }, + { 0x82,0xfc,0x7e,0x7e }, { 0x47,0x7a,0x3d,0x3d }, + { 0xac,0xc8,0x64,0x64 }, { 0xe7,0xba,0x5d,0x5d }, + { 0x2b,0x32,0x19,0x19 }, { 0x95,0xe6,0x73,0x73 }, + { 0xa0,0xc0,0x60,0x60 }, { 0x98,0x19,0x81,0x81 }, + { 0xd1,0x9e,0x4f,0x4f }, { 0x7f,0xa3,0xdc,0xdc }, + { 0x66,0x44,0x22,0x22 }, { 0x7e,0x54,0x2a,0x2a }, + { 0xab,0x3b,0x90,0x90 }, { 0x83,0x0b,0x88,0x88 }, + { 0xca,0x8c,0x46,0x46 }, { 0x29,0xc7,0xee,0xee }, + { 0xd3,0x6b,0xb8,0xb8 }, { 0x3c,0x28,0x14,0x14 }, + { 0x79,0xa7,0xde,0xde }, { 0xe2,0xbc,0x5e,0x5e }, + { 0x1d,0x16,0x0b,0x0b }, { 0x76,0xad,0xdb,0xdb }, + { 0x3b,0xdb,0xe0,0xe0 }, { 0x56,0x64,0x32,0x32 }, + { 0x4e,0x74,0x3a,0x3a }, { 0x1e,0x14,0x0a,0x0a }, + { 0xdb,0x92,0x49,0x49 }, { 0x0a,0x0c,0x06,0x06 }, + { 0x6c,0x48,0x24,0x24 }, { 0xe4,0xb8,0x5c,0x5c }, + { 0x5d,0x9f,0xc2,0xc2 }, { 0x6e,0xbd,0xd3,0xd3 }, + { 0xef,0x43,0xac,0xac }, { 0xa6,0xc4,0x62,0x62 }, + { 0xa8,0x39,0x91,0x91 }, { 0xa4,0x31,0x95,0x95 }, + { 0x37,0xd3,0xe4,0xe4 }, { 0x8b,0xf2,0x79,0x79 }, + { 0x32,0xd5,0xe7,0xe7 }, { 0x43,0x8b,0xc8,0xc8 }, + { 0x59,0x6e,0x37,0x37 }, { 0xb7,0xda,0x6d,0x6d }, + { 0x8c,0x01,0x8d,0x8d }, { 0x64,0xb1,0xd5,0xd5 }, + { 0xd2,0x9c,0x4e,0x4e }, { 0xe0,0x49,0xa9,0xa9 }, + { 0xb4,0xd8,0x6c,0x6c }, { 0xfa,0xac,0x56,0x56 }, + { 0x07,0xf3,0xf4,0xf4 }, { 0x25,0xcf,0xea,0xea }, + { 0xaf,0xca,0x65,0x65 }, { 0x8e,0xf4,0x7a,0x7a }, + { 0xe9,0x47,0xae,0xae }, { 0x18,0x10,0x08,0x08 }, + { 0xd5,0x6f,0xba,0xba }, { 0x88,0xf0,0x78,0x78 }, + { 0x6f,0x4a,0x25,0x25 }, { 0x72,0x5c,0x2e,0x2e }, + { 0x24,0x38,0x1c,0x1c }, { 0xf1,0x57,0xa6,0xa6 }, + { 0xc7,0x73,0xb4,0xb4 }, { 0x51,0x97,0xc6,0xc6 }, + { 0x23,0xcb,0xe8,0xe8 }, { 0x7c,0xa1,0xdd,0xdd }, + { 0x9c,0xe8,0x74,0x74 }, { 0x21,0x3e,0x1f,0x1f }, + { 0xdd,0x96,0x4b,0x4b }, { 0xdc,0x61,0xbd,0xbd }, + { 0x86,0x0d,0x8b,0x8b }, { 0x85,0x0f,0x8a,0x8a }, + { 0x90,0xe0,0x70,0x70 }, { 0x42,0x7c,0x3e,0x3e }, + { 0xc4,0x71,0xb5,0xb5 }, { 0xaa,0xcc,0x66,0x66 }, + { 0xd8,0x90,0x48,0x48 }, { 0x05,0x06,0x03,0x03 }, + { 0x01,0xf7,0xf6,0xf6 }, { 0x12,0x1c,0x0e,0x0e }, + { 0xa3,0xc2,0x61,0x61 }, { 0x5f,0x6a,0x35,0x35 }, + { 0xf9,0xae,0x57,0x57 }, { 0xd0,0x69,0xb9,0xb9 }, + { 0x91,0x17,0x86,0x86 }, { 0x58,0x99,0xc1,0xc1 }, + { 0x27,0x3a,0x1d,0x1d }, { 0xb9,0x27,0x9e,0x9e }, + { 0x38,0xd9,0xe1,0xe1 }, { 0x13,0xeb,0xf8,0xf8 }, + { 0xb3,0x2b,0x98,0x98 }, { 0x33,0x22,0x11,0x11 }, + { 0xbb,0xd2,0x69,0x69 }, { 0x70,0xa9,0xd9,0xd9 }, + { 0x89,0x07,0x8e,0x8e }, { 0xa7,0x33,0x94,0x94 }, + { 0xb6,0x2d,0x9b,0x9b }, { 0x22,0x3c,0x1e,0x1e }, + { 0x92,0x15,0x87,0x87 }, { 0x20,0xc9,0xe9,0xe9 }, + { 0x49,0x87,0xce,0xce }, { 0xff,0xaa,0x55,0x55 }, + { 0x78,0x50,0x28,0x28 }, { 0x7a,0xa5,0xdf,0xdf }, + { 0x8f,0x03,0x8c,0x8c }, { 0xf8,0x59,0xa1,0xa1 }, + { 0x80,0x09,0x89,0x89 }, { 0x17,0x1a,0x0d,0x0d }, + { 0xda,0x65,0xbf,0xbf }, { 0x31,0xd7,0xe6,0xe6 }, + { 0xc6,0x84,0x42,0x42 }, { 0xb8,0xd0,0x68,0x68 }, + { 0xc3,0x82,0x41,0x41 }, { 0xb0,0x29,0x99,0x99 }, + { 0x77,0x5a,0x2d,0x2d }, { 0x11,0x1e,0x0f,0x0f }, + { 0xcb,0x7b,0xb0,0xb0 }, { 0xfc,0xa8,0x54,0x54 }, + { 0xd6,0x6d,0xbb,0xbb }, { 0x3a,0x2c,0x16,0x16 } +}; + +static const byte T3[256][4] = +{ + { 0x63,0xa5,0xc6,0x63 }, { 0x7c,0x84,0xf8,0x7c }, + { 0x77,0x99,0xee,0x77 }, { 0x7b,0x8d,0xf6,0x7b }, + { 0xf2,0x0d,0xff,0xf2 }, { 0x6b,0xbd,0xd6,0x6b }, + { 0x6f,0xb1,0xde,0x6f }, { 0xc5,0x54,0x91,0xc5 }, + { 0x30,0x50,0x60,0x30 }, { 0x01,0x03,0x02,0x01 }, + { 0x67,0xa9,0xce,0x67 }, { 0x2b,0x7d,0x56,0x2b }, + { 0xfe,0x19,0xe7,0xfe }, { 0xd7,0x62,0xb5,0xd7 }, + { 0xab,0xe6,0x4d,0xab }, { 0x76,0x9a,0xec,0x76 }, + { 0xca,0x45,0x8f,0xca }, { 0x82,0x9d,0x1f,0x82 }, + { 0xc9,0x40,0x89,0xc9 }, { 0x7d,0x87,0xfa,0x7d }, + { 0xfa,0x15,0xef,0xfa }, { 0x59,0xeb,0xb2,0x59 }, + { 0x47,0xc9,0x8e,0x47 }, { 0xf0,0x0b,0xfb,0xf0 }, + { 0xad,0xec,0x41,0xad }, { 0xd4,0x67,0xb3,0xd4 }, + { 0xa2,0xfd,0x5f,0xa2 }, { 0xaf,0xea,0x45,0xaf }, + { 0x9c,0xbf,0x23,0x9c }, { 0xa4,0xf7,0x53,0xa4 }, + { 0x72,0x96,0xe4,0x72 }, { 0xc0,0x5b,0x9b,0xc0 }, + { 0xb7,0xc2,0x75,0xb7 }, { 0xfd,0x1c,0xe1,0xfd }, + { 0x93,0xae,0x3d,0x93 }, { 0x26,0x6a,0x4c,0x26 }, + { 0x36,0x5a,0x6c,0x36 }, { 0x3f,0x41,0x7e,0x3f }, + { 0xf7,0x02,0xf5,0xf7 }, { 0xcc,0x4f,0x83,0xcc }, + { 0x34,0x5c,0x68,0x34 }, { 0xa5,0xf4,0x51,0xa5 }, + { 0xe5,0x34,0xd1,0xe5 }, { 0xf1,0x08,0xf9,0xf1 }, + { 0x71,0x93,0xe2,0x71 }, { 0xd8,0x73,0xab,0xd8 }, + { 0x31,0x53,0x62,0x31 }, { 0x15,0x3f,0x2a,0x15 }, + { 0x04,0x0c,0x08,0x04 }, { 0xc7,0x52,0x95,0xc7 }, + { 0x23,0x65,0x46,0x23 }, { 0xc3,0x5e,0x9d,0xc3 }, + { 0x18,0x28,0x30,0x18 }, { 0x96,0xa1,0x37,0x96 }, + { 0x05,0x0f,0x0a,0x05 }, { 0x9a,0xb5,0x2f,0x9a }, + { 0x07,0x09,0x0e,0x07 }, { 0x12,0x36,0x24,0x12 }, + { 0x80,0x9b,0x1b,0x80 }, { 0xe2,0x3d,0xdf,0xe2 }, + { 0xeb,0x26,0xcd,0xeb }, { 0x27,0x69,0x4e,0x27 }, + { 0xb2,0xcd,0x7f,0xb2 }, { 0x75,0x9f,0xea,0x75 }, + { 0x09,0x1b,0x12,0x09 }, { 0x83,0x9e,0x1d,0x83 }, + { 0x2c,0x74,0x58,0x2c }, { 0x1a,0x2e,0x34,0x1a }, + { 0x1b,0x2d,0x36,0x1b }, { 0x6e,0xb2,0xdc,0x6e }, + { 0x5a,0xee,0xb4,0x5a }, { 0xa0,0xfb,0x5b,0xa0 }, + { 0x52,0xf6,0xa4,0x52 }, { 0x3b,0x4d,0x76,0x3b }, + { 0xd6,0x61,0xb7,0xd6 }, { 0xb3,0xce,0x7d,0xb3 }, + { 0x29,0x7b,0x52,0x29 }, { 0xe3,0x3e,0xdd,0xe3 }, + { 0x2f,0x71,0x5e,0x2f }, { 0x84,0x97,0x13,0x84 }, + { 0x53,0xf5,0xa6,0x53 }, { 0xd1,0x68,0xb9,0xd1 }, + { 0x00,0x00,0x00,0x00 }, { 0xed,0x2c,0xc1,0xed }, + { 0x20,0x60,0x40,0x20 }, { 0xfc,0x1f,0xe3,0xfc }, + { 0xb1,0xc8,0x79,0xb1 }, { 0x5b,0xed,0xb6,0x5b }, + { 0x6a,0xbe,0xd4,0x6a }, { 0xcb,0x46,0x8d,0xcb }, + { 0xbe,0xd9,0x67,0xbe }, { 0x39,0x4b,0x72,0x39 }, + { 0x4a,0xde,0x94,0x4a }, { 0x4c,0xd4,0x98,0x4c }, + { 0x58,0xe8,0xb0,0x58 }, { 0xcf,0x4a,0x85,0xcf }, + { 0xd0,0x6b,0xbb,0xd0 }, { 0xef,0x2a,0xc5,0xef }, + { 0xaa,0xe5,0x4f,0xaa }, { 0xfb,0x16,0xed,0xfb }, + { 0x43,0xc5,0x86,0x43 }, { 0x4d,0xd7,0x9a,0x4d }, + { 0x33,0x55,0x66,0x33 }, { 0x85,0x94,0x11,0x85 }, + { 0x45,0xcf,0x8a,0x45 }, { 0xf9,0x10,0xe9,0xf9 }, + { 0x02,0x06,0x04,0x02 }, { 0x7f,0x81,0xfe,0x7f }, + { 0x50,0xf0,0xa0,0x50 }, { 0x3c,0x44,0x78,0x3c }, + { 0x9f,0xba,0x25,0x9f }, { 0xa8,0xe3,0x4b,0xa8 }, + { 0x51,0xf3,0xa2,0x51 }, { 0xa3,0xfe,0x5d,0xa3 }, + { 0x40,0xc0,0x80,0x40 }, { 0x8f,0x8a,0x05,0x8f }, + { 0x92,0xad,0x3f,0x92 }, { 0x9d,0xbc,0x21,0x9d }, + { 0x38,0x48,0x70,0x38 }, { 0xf5,0x04,0xf1,0xf5 }, + { 0xbc,0xdf,0x63,0xbc }, { 0xb6,0xc1,0x77,0xb6 }, + { 0xda,0x75,0xaf,0xda }, { 0x21,0x63,0x42,0x21 }, + { 0x10,0x30,0x20,0x10 }, { 0xff,0x1a,0xe5,0xff }, + { 0xf3,0x0e,0xfd,0xf3 }, { 0xd2,0x6d,0xbf,0xd2 }, + { 0xcd,0x4c,0x81,0xcd }, { 0x0c,0x14,0x18,0x0c }, + { 0x13,0x35,0x26,0x13 }, { 0xec,0x2f,0xc3,0xec }, + { 0x5f,0xe1,0xbe,0x5f }, { 0x97,0xa2,0x35,0x97 }, + { 0x44,0xcc,0x88,0x44 }, { 0x17,0x39,0x2e,0x17 }, + { 0xc4,0x57,0x93,0xc4 }, { 0xa7,0xf2,0x55,0xa7 }, + { 0x7e,0x82,0xfc,0x7e }, { 0x3d,0x47,0x7a,0x3d }, + { 0x64,0xac,0xc8,0x64 }, { 0x5d,0xe7,0xba,0x5d }, + { 0x19,0x2b,0x32,0x19 }, { 0x73,0x95,0xe6,0x73 }, + { 0x60,0xa0,0xc0,0x60 }, { 0x81,0x98,0x19,0x81 }, + { 0x4f,0xd1,0x9e,0x4f }, { 0xdc,0x7f,0xa3,0xdc }, + { 0x22,0x66,0x44,0x22 }, { 0x2a,0x7e,0x54,0x2a }, + { 0x90,0xab,0x3b,0x90 }, { 0x88,0x83,0x0b,0x88 }, + { 0x46,0xca,0x8c,0x46 }, { 0xee,0x29,0xc7,0xee }, + { 0xb8,0xd3,0x6b,0xb8 }, { 0x14,0x3c,0x28,0x14 }, + { 0xde,0x79,0xa7,0xde }, { 0x5e,0xe2,0xbc,0x5e }, + { 0x0b,0x1d,0x16,0x0b }, { 0xdb,0x76,0xad,0xdb }, + { 0xe0,0x3b,0xdb,0xe0 }, { 0x32,0x56,0x64,0x32 }, + { 0x3a,0x4e,0x74,0x3a }, { 0x0a,0x1e,0x14,0x0a }, + { 0x49,0xdb,0x92,0x49 }, { 0x06,0x0a,0x0c,0x06 }, + { 0x24,0x6c,0x48,0x24 }, { 0x5c,0xe4,0xb8,0x5c }, + { 0xc2,0x5d,0x9f,0xc2 }, { 0xd3,0x6e,0xbd,0xd3 }, + { 0xac,0xef,0x43,0xac }, { 0x62,0xa6,0xc4,0x62 }, + { 0x91,0xa8,0x39,0x91 }, { 0x95,0xa4,0x31,0x95 }, + { 0xe4,0x37,0xd3,0xe4 }, { 0x79,0x8b,0xf2,0x79 }, + { 0xe7,0x32,0xd5,0xe7 }, { 0xc8,0x43,0x8b,0xc8 }, + { 0x37,0x59,0x6e,0x37 }, { 0x6d,0xb7,0xda,0x6d }, + { 0x8d,0x8c,0x01,0x8d }, { 0xd5,0x64,0xb1,0xd5 }, + { 0x4e,0xd2,0x9c,0x4e }, { 0xa9,0xe0,0x49,0xa9 }, + { 0x6c,0xb4,0xd8,0x6c }, { 0x56,0xfa,0xac,0x56 }, + { 0xf4,0x07,0xf3,0xf4 }, { 0xea,0x25,0xcf,0xea }, + { 0x65,0xaf,0xca,0x65 }, { 0x7a,0x8e,0xf4,0x7a }, + { 0xae,0xe9,0x47,0xae }, { 0x08,0x18,0x10,0x08 }, + { 0xba,0xd5,0x6f,0xba }, { 0x78,0x88,0xf0,0x78 }, + { 0x25,0x6f,0x4a,0x25 }, { 0x2e,0x72,0x5c,0x2e }, + { 0x1c,0x24,0x38,0x1c }, { 0xa6,0xf1,0x57,0xa6 }, + { 0xb4,0xc7,0x73,0xb4 }, { 0xc6,0x51,0x97,0xc6 }, + { 0xe8,0x23,0xcb,0xe8 }, { 0xdd,0x7c,0xa1,0xdd }, + { 0x74,0x9c,0xe8,0x74 }, { 0x1f,0x21,0x3e,0x1f }, + { 0x4b,0xdd,0x96,0x4b }, { 0xbd,0xdc,0x61,0xbd }, + { 0x8b,0x86,0x0d,0x8b }, { 0x8a,0x85,0x0f,0x8a }, + { 0x70,0x90,0xe0,0x70 }, { 0x3e,0x42,0x7c,0x3e }, + { 0xb5,0xc4,0x71,0xb5 }, { 0x66,0xaa,0xcc,0x66 }, + { 0x48,0xd8,0x90,0x48 }, { 0x03,0x05,0x06,0x03 }, + { 0xf6,0x01,0xf7,0xf6 }, { 0x0e,0x12,0x1c,0x0e }, + { 0x61,0xa3,0xc2,0x61 }, { 0x35,0x5f,0x6a,0x35 }, + { 0x57,0xf9,0xae,0x57 }, { 0xb9,0xd0,0x69,0xb9 }, + { 0x86,0x91,0x17,0x86 }, { 0xc1,0x58,0x99,0xc1 }, + { 0x1d,0x27,0x3a,0x1d }, { 0x9e,0xb9,0x27,0x9e }, + { 0xe1,0x38,0xd9,0xe1 }, { 0xf8,0x13,0xeb,0xf8 }, + { 0x98,0xb3,0x2b,0x98 }, { 0x11,0x33,0x22,0x11 }, + { 0x69,0xbb,0xd2,0x69 }, { 0xd9,0x70,0xa9,0xd9 }, + { 0x8e,0x89,0x07,0x8e }, { 0x94,0xa7,0x33,0x94 }, + { 0x9b,0xb6,0x2d,0x9b }, { 0x1e,0x22,0x3c,0x1e }, + { 0x87,0x92,0x15,0x87 }, { 0xe9,0x20,0xc9,0xe9 }, + { 0xce,0x49,0x87,0xce }, { 0x55,0xff,0xaa,0x55 }, + { 0x28,0x78,0x50,0x28 }, { 0xdf,0x7a,0xa5,0xdf }, + { 0x8c,0x8f,0x03,0x8c }, { 0xa1,0xf8,0x59,0xa1 }, + { 0x89,0x80,0x09,0x89 }, { 0x0d,0x17,0x1a,0x0d }, + { 0xbf,0xda,0x65,0xbf }, { 0xe6,0x31,0xd7,0xe6 }, + { 0x42,0xc6,0x84,0x42 }, { 0x68,0xb8,0xd0,0x68 }, + { 0x41,0xc3,0x82,0x41 }, { 0x99,0xb0,0x29,0x99 }, + { 0x2d,0x77,0x5a,0x2d }, { 0x0f,0x11,0x1e,0x0f }, + { 0xb0,0xcb,0x7b,0xb0 }, { 0x54,0xfc,0xa8,0x54 }, + { 0xbb,0xd6,0x6d,0xbb }, { 0x16,0x3a,0x2c,0x16 } +}; + +static const byte T4[256][4] = +{ + { 0x63,0x63,0xa5,0xc6 }, { 0x7c,0x7c,0x84,0xf8 }, + { 0x77,0x77,0x99,0xee }, { 0x7b,0x7b,0x8d,0xf6 }, + { 0xf2,0xf2,0x0d,0xff }, { 0x6b,0x6b,0xbd,0xd6 }, + { 0x6f,0x6f,0xb1,0xde }, { 0xc5,0xc5,0x54,0x91 }, + { 0x30,0x30,0x50,0x60 }, { 0x01,0x01,0x03,0x02 }, + { 0x67,0x67,0xa9,0xce }, { 0x2b,0x2b,0x7d,0x56 }, + { 0xfe,0xfe,0x19,0xe7 }, { 0xd7,0xd7,0x62,0xb5 }, + { 0xab,0xab,0xe6,0x4d }, { 0x76,0x76,0x9a,0xec }, + { 0xca,0xca,0x45,0x8f }, { 0x82,0x82,0x9d,0x1f }, + { 0xc9,0xc9,0x40,0x89 }, { 0x7d,0x7d,0x87,0xfa }, + { 0xfa,0xfa,0x15,0xef }, { 0x59,0x59,0xeb,0xb2 }, + { 0x47,0x47,0xc9,0x8e }, { 0xf0,0xf0,0x0b,0xfb }, + { 0xad,0xad,0xec,0x41 }, { 0xd4,0xd4,0x67,0xb3 }, + { 0xa2,0xa2,0xfd,0x5f }, { 0xaf,0xaf,0xea,0x45 }, + { 0x9c,0x9c,0xbf,0x23 }, { 0xa4,0xa4,0xf7,0x53 }, + { 0x72,0x72,0x96,0xe4 }, { 0xc0,0xc0,0x5b,0x9b }, + { 0xb7,0xb7,0xc2,0x75 }, { 0xfd,0xfd,0x1c,0xe1 }, + { 0x93,0x93,0xae,0x3d }, { 0x26,0x26,0x6a,0x4c }, + { 0x36,0x36,0x5a,0x6c }, { 0x3f,0x3f,0x41,0x7e }, + { 0xf7,0xf7,0x02,0xf5 }, { 0xcc,0xcc,0x4f,0x83 }, + { 0x34,0x34,0x5c,0x68 }, { 0xa5,0xa5,0xf4,0x51 }, + { 0xe5,0xe5,0x34,0xd1 }, { 0xf1,0xf1,0x08,0xf9 }, + { 0x71,0x71,0x93,0xe2 }, { 0xd8,0xd8,0x73,0xab }, + { 0x31,0x31,0x53,0x62 }, { 0x15,0x15,0x3f,0x2a }, + { 0x04,0x04,0x0c,0x08 }, { 0xc7,0xc7,0x52,0x95 }, + { 0x23,0x23,0x65,0x46 }, { 0xc3,0xc3,0x5e,0x9d }, + { 0x18,0x18,0x28,0x30 }, { 0x96,0x96,0xa1,0x37 }, + { 0x05,0x05,0x0f,0x0a }, { 0x9a,0x9a,0xb5,0x2f }, + { 0x07,0x07,0x09,0x0e }, { 0x12,0x12,0x36,0x24 }, + { 0x80,0x80,0x9b,0x1b }, { 0xe2,0xe2,0x3d,0xdf }, + { 0xeb,0xeb,0x26,0xcd }, { 0x27,0x27,0x69,0x4e }, + { 0xb2,0xb2,0xcd,0x7f }, { 0x75,0x75,0x9f,0xea }, + { 0x09,0x09,0x1b,0x12 }, { 0x83,0x83,0x9e,0x1d }, + { 0x2c,0x2c,0x74,0x58 }, { 0x1a,0x1a,0x2e,0x34 }, + { 0x1b,0x1b,0x2d,0x36 }, { 0x6e,0x6e,0xb2,0xdc }, + { 0x5a,0x5a,0xee,0xb4 }, { 0xa0,0xa0,0xfb,0x5b }, + { 0x52,0x52,0xf6,0xa4 }, { 0x3b,0x3b,0x4d,0x76 }, + { 0xd6,0xd6,0x61,0xb7 }, { 0xb3,0xb3,0xce,0x7d }, + { 0x29,0x29,0x7b,0x52 }, { 0xe3,0xe3,0x3e,0xdd }, + { 0x2f,0x2f,0x71,0x5e }, { 0x84,0x84,0x97,0x13 }, + { 0x53,0x53,0xf5,0xa6 }, { 0xd1,0xd1,0x68,0xb9 }, + { 0x00,0x00,0x00,0x00 }, { 0xed,0xed,0x2c,0xc1 }, + { 0x20,0x20,0x60,0x40 }, { 0xfc,0xfc,0x1f,0xe3 }, + { 0xb1,0xb1,0xc8,0x79 }, { 0x5b,0x5b,0xed,0xb6 }, + { 0x6a,0x6a,0xbe,0xd4 }, { 0xcb,0xcb,0x46,0x8d }, + { 0xbe,0xbe,0xd9,0x67 }, { 0x39,0x39,0x4b,0x72 }, + { 0x4a,0x4a,0xde,0x94 }, { 0x4c,0x4c,0xd4,0x98 }, + { 0x58,0x58,0xe8,0xb0 }, { 0xcf,0xcf,0x4a,0x85 }, + { 0xd0,0xd0,0x6b,0xbb }, { 0xef,0xef,0x2a,0xc5 }, + { 0xaa,0xaa,0xe5,0x4f }, { 0xfb,0xfb,0x16,0xed }, + { 0x43,0x43,0xc5,0x86 }, { 0x4d,0x4d,0xd7,0x9a }, + { 0x33,0x33,0x55,0x66 }, { 0x85,0x85,0x94,0x11 }, + { 0x45,0x45,0xcf,0x8a }, { 0xf9,0xf9,0x10,0xe9 }, + { 0x02,0x02,0x06,0x04 }, { 0x7f,0x7f,0x81,0xfe }, + { 0x50,0x50,0xf0,0xa0 }, { 0x3c,0x3c,0x44,0x78 }, + { 0x9f,0x9f,0xba,0x25 }, { 0xa8,0xa8,0xe3,0x4b }, + { 0x51,0x51,0xf3,0xa2 }, { 0xa3,0xa3,0xfe,0x5d }, + { 0x40,0x40,0xc0,0x80 }, { 0x8f,0x8f,0x8a,0x05 }, + { 0x92,0x92,0xad,0x3f }, { 0x9d,0x9d,0xbc,0x21 }, + { 0x38,0x38,0x48,0x70 }, { 0xf5,0xf5,0x04,0xf1 }, + { 0xbc,0xbc,0xdf,0x63 }, { 0xb6,0xb6,0xc1,0x77 }, + { 0xda,0xda,0x75,0xaf }, { 0x21,0x21,0x63,0x42 }, + { 0x10,0x10,0x30,0x20 }, { 0xff,0xff,0x1a,0xe5 }, + { 0xf3,0xf3,0x0e,0xfd }, { 0xd2,0xd2,0x6d,0xbf }, + { 0xcd,0xcd,0x4c,0x81 }, { 0x0c,0x0c,0x14,0x18 }, + { 0x13,0x13,0x35,0x26 }, { 0xec,0xec,0x2f,0xc3 }, + { 0x5f,0x5f,0xe1,0xbe }, { 0x97,0x97,0xa2,0x35 }, + { 0x44,0x44,0xcc,0x88 }, { 0x17,0x17,0x39,0x2e }, + { 0xc4,0xc4,0x57,0x93 }, { 0xa7,0xa7,0xf2,0x55 }, + { 0x7e,0x7e,0x82,0xfc }, { 0x3d,0x3d,0x47,0x7a }, + { 0x64,0x64,0xac,0xc8 }, { 0x5d,0x5d,0xe7,0xba }, + { 0x19,0x19,0x2b,0x32 }, { 0x73,0x73,0x95,0xe6 }, + { 0x60,0x60,0xa0,0xc0 }, { 0x81,0x81,0x98,0x19 }, + { 0x4f,0x4f,0xd1,0x9e }, { 0xdc,0xdc,0x7f,0xa3 }, + { 0x22,0x22,0x66,0x44 }, { 0x2a,0x2a,0x7e,0x54 }, + { 0x90,0x90,0xab,0x3b }, { 0x88,0x88,0x83,0x0b }, + { 0x46,0x46,0xca,0x8c }, { 0xee,0xee,0x29,0xc7 }, + { 0xb8,0xb8,0xd3,0x6b }, { 0x14,0x14,0x3c,0x28 }, + { 0xde,0xde,0x79,0xa7 }, { 0x5e,0x5e,0xe2,0xbc }, + { 0x0b,0x0b,0x1d,0x16 }, { 0xdb,0xdb,0x76,0xad }, + { 0xe0,0xe0,0x3b,0xdb }, { 0x32,0x32,0x56,0x64 }, + { 0x3a,0x3a,0x4e,0x74 }, { 0x0a,0x0a,0x1e,0x14 }, + { 0x49,0x49,0xdb,0x92 }, { 0x06,0x06,0x0a,0x0c }, + { 0x24,0x24,0x6c,0x48 }, { 0x5c,0x5c,0xe4,0xb8 }, + { 0xc2,0xc2,0x5d,0x9f }, { 0xd3,0xd3,0x6e,0xbd }, + { 0xac,0xac,0xef,0x43 }, { 0x62,0x62,0xa6,0xc4 }, + { 0x91,0x91,0xa8,0x39 }, { 0x95,0x95,0xa4,0x31 }, + { 0xe4,0xe4,0x37,0xd3 }, { 0x79,0x79,0x8b,0xf2 }, + { 0xe7,0xe7,0x32,0xd5 }, { 0xc8,0xc8,0x43,0x8b }, + { 0x37,0x37,0x59,0x6e }, { 0x6d,0x6d,0xb7,0xda }, + { 0x8d,0x8d,0x8c,0x01 }, { 0xd5,0xd5,0x64,0xb1 }, + { 0x4e,0x4e,0xd2,0x9c }, { 0xa9,0xa9,0xe0,0x49 }, + { 0x6c,0x6c,0xb4,0xd8 }, { 0x56,0x56,0xfa,0xac }, + { 0xf4,0xf4,0x07,0xf3 }, { 0xea,0xea,0x25,0xcf }, + { 0x65,0x65,0xaf,0xca }, { 0x7a,0x7a,0x8e,0xf4 }, + { 0xae,0xae,0xe9,0x47 }, { 0x08,0x08,0x18,0x10 }, + { 0xba,0xba,0xd5,0x6f }, { 0x78,0x78,0x88,0xf0 }, + { 0x25,0x25,0x6f,0x4a }, { 0x2e,0x2e,0x72,0x5c }, + { 0x1c,0x1c,0x24,0x38 }, { 0xa6,0xa6,0xf1,0x57 }, + { 0xb4,0xb4,0xc7,0x73 }, { 0xc6,0xc6,0x51,0x97 }, + { 0xe8,0xe8,0x23,0xcb }, { 0xdd,0xdd,0x7c,0xa1 }, + { 0x74,0x74,0x9c,0xe8 }, { 0x1f,0x1f,0x21,0x3e }, + { 0x4b,0x4b,0xdd,0x96 }, { 0xbd,0xbd,0xdc,0x61 }, + { 0x8b,0x8b,0x86,0x0d }, { 0x8a,0x8a,0x85,0x0f }, + { 0x70,0x70,0x90,0xe0 }, { 0x3e,0x3e,0x42,0x7c }, + { 0xb5,0xb5,0xc4,0x71 }, { 0x66,0x66,0xaa,0xcc }, + { 0x48,0x48,0xd8,0x90 }, { 0x03,0x03,0x05,0x06 }, + { 0xf6,0xf6,0x01,0xf7 }, { 0x0e,0x0e,0x12,0x1c }, + { 0x61,0x61,0xa3,0xc2 }, { 0x35,0x35,0x5f,0x6a }, + { 0x57,0x57,0xf9,0xae }, { 0xb9,0xb9,0xd0,0x69 }, + { 0x86,0x86,0x91,0x17 }, { 0xc1,0xc1,0x58,0x99 }, + { 0x1d,0x1d,0x27,0x3a }, { 0x9e,0x9e,0xb9,0x27 }, + { 0xe1,0xe1,0x38,0xd9 }, { 0xf8,0xf8,0x13,0xeb }, + { 0x98,0x98,0xb3,0x2b }, { 0x11,0x11,0x33,0x22 }, + { 0x69,0x69,0xbb,0xd2 }, { 0xd9,0xd9,0x70,0xa9 }, + { 0x8e,0x8e,0x89,0x07 }, { 0x94,0x94,0xa7,0x33 }, + { 0x9b,0x9b,0xb6,0x2d }, { 0x1e,0x1e,0x22,0x3c }, + { 0x87,0x87,0x92,0x15 }, { 0xe9,0xe9,0x20,0xc9 }, + { 0xce,0xce,0x49,0x87 }, { 0x55,0x55,0xff,0xaa }, + { 0x28,0x28,0x78,0x50 }, { 0xdf,0xdf,0x7a,0xa5 }, + { 0x8c,0x8c,0x8f,0x03 }, { 0xa1,0xa1,0xf8,0x59 }, + { 0x89,0x89,0x80,0x09 }, { 0x0d,0x0d,0x17,0x1a }, + { 0xbf,0xbf,0xda,0x65 }, { 0xe6,0xe6,0x31,0xd7 }, + { 0x42,0x42,0xc6,0x84 }, { 0x68,0x68,0xb8,0xd0 }, + { 0x41,0x41,0xc3,0x82 }, { 0x99,0x99,0xb0,0x29 }, + { 0x2d,0x2d,0x77,0x5a }, { 0x0f,0x0f,0x11,0x1e }, + { 0xb0,0xb0,0xcb,0x7b }, { 0x54,0x54,0xfc,0xa8 }, + { 0xbb,0xbb,0xd6,0x6d }, { 0x16,0x16,0x3a,0x2c } +}; + +static const uint32_t rcon[30] = +{ + 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 +}; + +static char *AES_SelfTest(void); + +/* Perform the key setup. + */ +static boolean AES_SetKey(RIJNDAEL_context *ctx, const byte *key, + const unsigned keylen) +{ + int ROUNDS; + byte k[MAXKC][4]; + int i,j, r, t, rconpointer = 0; + byte tk[MAXKC][4]; + int KC; + + if( keylen == 128/8 ) + { + ROUNDS = 10; + KC = 4; + } + else if ( keylen == 192/8 ) + { + ROUNDS = 12; + KC = 6; + } + else if ( keylen == 256/8 ) + { + ROUNDS = 14; + KC = 8; + } + else + { + return false; + } + + ctx->ROUNDS = ROUNDS; + + for (i = 0; i < keylen; i++) + { + k[i >> 2][i & 3] = key[i]; + } +#define W (ctx->keySched) + + for (j = KC-1; j >= 0; j--) + { + *((uint32_t*)tk[j]) = *((uint32_t*)k[j]); + } + r = 0; + t = 0; + /* copy values into round key array */ + for (j = 0; (j < KC) && (r < ROUNDS + 1); ) + { + for (; (j < KC) && (t < 4); j++, t++) + { + W[r][t] = *((uint32_t*)tk[j]); + } + if (t == 4) + { + r++; + t = 0; + } + } + + while (r < ROUNDS + 1) + { + /* while not enough round key material calculated */ + /* calculate new values */ + tk[0][0] ^= S[tk[KC-1][1]]; + tk[0][1] ^= S[tk[KC-1][2]]; + tk[0][2] ^= S[tk[KC-1][3]]; + tk[0][3] ^= S[tk[KC-1][0]]; + tk[0][0] ^= rcon[rconpointer++]; + + if (KC != 8) + { + for (j = 1; j < KC; j++) + { + *((uint32_t*)tk[j]) ^= *((uint32_t*)tk[j-1]); + } + } + else + { + for (j = 1; j < KC/2; j++) + { + *((uint32_t*)tk[j]) ^= *((uint32_t*)tk[j-1]); + } + tk[KC/2][0] ^= S[tk[KC/2 - 1][0]]; + tk[KC/2][1] ^= S[tk[KC/2 - 1][1]]; + tk[KC/2][2] ^= S[tk[KC/2 - 1][2]]; + tk[KC/2][3] ^= S[tk[KC/2 - 1][3]]; + for (j = KC/2 + 1; j < KC; j++) + { + *((uint32_t*)tk[j]) ^= *((uint32_t*)tk[j-1]); + } + } + /* copy values into round key array */ + for (j = 0; (j < KC) && (r < ROUNDS + 1); ) + { + for (; (j < KC) && (t < 4); j++, t++) + { + W[r][t] = *((uint32_t*)tk[j]); + } + if (t == 4) + { + r++; + t = 0; + } + } + } + +#undef W + return true; +} + +/* Encrypt one block. A and B need to be aligned on a 4 byte + boundary. A and B may be the same. */ +static void AES_EncryptAligned(const RIJNDAEL_context *ctx, + byte *b, const byte *a) +{ +#define rk (ctx->keySched) + int ROUNDS = ctx->ROUNDS; + int r; + union + { + uint32_t u32; + byte b[4]; + } temp[4]; + + temp[0].u32 = *((uint32_t*)(a )) ^ rk[0][0]; + temp[1].u32 = *((uint32_t*)(a+ 4)) ^ rk[0][1]; + temp[2].u32 = *((uint32_t*)(a+ 8)) ^ rk[0][2]; + temp[3].u32 = *((uint32_t*)(a+12)) ^ rk[0][3]; + *((uint32_t*)(b )) = (*((uint32_t*)T1[temp[0].b[0]]) + ^ *((uint32_t*)T2[temp[1].b[1]]) + ^ *((uint32_t*)T3[temp[2].b[2]]) + ^ *((uint32_t*)T4[temp[3].b[3]])); + *((uint32_t*)(b + 4)) = (*((uint32_t*)T1[temp[1].b[0]]) + ^ *((uint32_t*)T2[temp[2].b[1]]) + ^ *((uint32_t*)T3[temp[3].b[2]]) + ^ *((uint32_t*)T4[temp[0].b[3]])); + *((uint32_t*)(b + 8)) = (*((uint32_t*)T1[temp[2].b[0]]) + ^ *((uint32_t*)T2[temp[3].b[1]]) + ^ *((uint32_t*)T3[temp[0].b[2]]) + ^ *((uint32_t*)T4[temp[1].b[3]])); + *((uint32_t*)(b +12)) = (*((uint32_t*)T1[temp[3].b[0]]) + ^ *((uint32_t*)T2[temp[0].b[1]]) + ^ *((uint32_t*)T3[temp[1].b[2]]) + ^ *((uint32_t*)T4[temp[2].b[3]])); + + for (r = 1; r < ROUNDS-1; r++) + { + temp[0].u32 = *((uint32_t*)(b )) ^ rk[r][0]; + temp[1].u32 = *((uint32_t*)(b+ 4)) ^ rk[r][1]; + temp[2].u32 = *((uint32_t*)(b+ 8)) ^ rk[r][2]; + temp[3].u32 = *((uint32_t*)(b+12)) ^ rk[r][3]; + + *((uint32_t*)(b )) = (*((uint32_t*)T1[temp[0].b[0]]) + ^ *((uint32_t*)T2[temp[1].b[1]]) + ^ *((uint32_t*)T3[temp[2].b[2]]) + ^ *((uint32_t*)T4[temp[3].b[3]])); + *((uint32_t*)(b + 4)) = (*((uint32_t*)T1[temp[1].b[0]]) + ^ *((uint32_t*)T2[temp[2].b[1]]) + ^ *((uint32_t*)T3[temp[3].b[2]]) + ^ *((uint32_t*)T4[temp[0].b[3]])); + *((uint32_t*)(b + 8)) = (*((uint32_t*)T1[temp[2].b[0]]) + ^ *((uint32_t*)T2[temp[3].b[1]]) + ^ *((uint32_t*)T3[temp[0].b[2]]) + ^ *((uint32_t*)T4[temp[1].b[3]])); + *((uint32_t*)(b +12)) = (*((uint32_t*)T1[temp[3].b[0]]) + ^ *((uint32_t*)T2[temp[0].b[1]]) + ^ *((uint32_t*)T3[temp[1].b[2]]) + ^ *((uint32_t*)T4[temp[2].b[3]])); + } + + /* Last round is special. */ + temp[0].u32 = *((uint32_t*)(b )) ^ rk[ROUNDS-1][0]; + temp[1].u32 = *((uint32_t*)(b+ 4)) ^ rk[ROUNDS-1][1]; + temp[2].u32 = *((uint32_t*)(b+ 8)) ^ rk[ROUNDS-1][2]; + temp[3].u32 = *((uint32_t*)(b+12)) ^ rk[ROUNDS-1][3]; + b[ 0] = T1[temp[0].b[0]][1]; + b[ 1] = T1[temp[1].b[1]][1]; + b[ 2] = T1[temp[2].b[2]][1]; + b[ 3] = T1[temp[3].b[3]][1]; + b[ 4] = T1[temp[1].b[0]][1]; + b[ 5] = T1[temp[2].b[1]][1]; + b[ 6] = T1[temp[3].b[2]][1]; + b[ 7] = T1[temp[0].b[3]][1]; + b[ 8] = T1[temp[2].b[0]][1]; + b[ 9] = T1[temp[3].b[1]][1]; + b[10] = T1[temp[0].b[2]][1]; + b[11] = T1[temp[1].b[3]][1]; + b[12] = T1[temp[3].b[0]][1]; + b[13] = T1[temp[0].b[1]][1]; + b[14] = T1[temp[1].b[2]][1]; + b[15] = T1[temp[2].b[3]][1]; + *((uint32_t*)(b )) ^= rk[ROUNDS][0]; + *((uint32_t*)(b+ 4)) ^= rk[ROUNDS][1]; + *((uint32_t*)(b+ 8)) ^= rk[ROUNDS][2]; + *((uint32_t*)(b+12)) ^= rk[ROUNDS][3]; +#undef rk +} + +static void AES_Encrypt(const RIJNDAEL_context *ctx, + byte *bx, const byte *ax) +{ + /* BX and AX are not necessary correctly aligned. Thus we need to + copy them here. */ + uint32_t a[4]; + uint32_t b[4]; + + memcpy(a, ax, 16); + AES_EncryptAligned(ctx, (byte *) b, (byte *) a); + memcpy(bx, b, 16); +} + +/* Test a single encryption and decryption with each key size. */ + +static char *AES_SelfTest(void) +{ + RIJNDAEL_context ctx; + byte scratch[16]; + + /* The test vectors are from the AES supplied ones; more or less + * randomly taken from ecb_tbl.txt (I=42,81,14) + */ + static const byte plaintext[16] = { + 0x01,0x4B,0xAF,0x22,0x78,0xA6,0x9D,0x33, + 0x1D,0x51,0x80,0x10,0x36,0x43,0xE9,0x9A + }; + static const byte key[16] = { + 0xE8,0xE9,0xEA,0xEB,0xED,0xEE,0xEF,0xF0, + 0xF2,0xF3,0xF4,0xF5,0xF7,0xF8,0xF9,0xFA + }; + static const byte ciphertext[16] = { + 0x67,0x43,0xC3,0xD1,0x51,0x9A,0xB4,0xF2, + 0xCD,0x9A,0x78,0xAB,0x09,0xA5,0x11,0xBD + }; + + static const byte plaintext_192[16] = { + 0x76,0x77,0x74,0x75,0xF1,0xF2,0xF3,0xF4, + 0xF8,0xF9,0xE6,0xE7,0x77,0x70,0x71,0x72 + }; + static const byte key_192[24] = { + 0x04,0x05,0x06,0x07,0x09,0x0A,0x0B,0x0C, + 0x0E,0x0F,0x10,0x11,0x13,0x14,0x15,0x16, + 0x18,0x19,0x1A,0x1B,0x1D,0x1E,0x1F,0x20 + }; + static const byte ciphertext_192[16] = { + 0x5D,0x1E,0xF2,0x0D,0xCE,0xD6,0xBC,0xBC, + 0x12,0x13,0x1A,0xC7,0xC5,0x47,0x88,0xAA + }; + + static const byte plaintext_256[16] = { + 0x06,0x9A,0x00,0x7F,0xC7,0x6A,0x45,0x9F, + 0x98,0xBA,0xF9,0x17,0xFE,0xDF,0x95,0x21 + }; + static const byte key_256[32] = { + 0x08,0x09,0x0A,0x0B,0x0D,0x0E,0x0F,0x10, + 0x12,0x13,0x14,0x15,0x17,0x18,0x19,0x1A, + 0x1C,0x1D,0x1E,0x1F,0x21,0x22,0x23,0x24, + 0x26,0x27,0x28,0x29,0x2B,0x2C,0x2D,0x2E + }; + static const byte ciphertext_256[16] = { + 0x08,0x0E,0x95,0x17,0xEB,0x16,0x77,0x71, + 0x9A,0xCF,0x72,0x80,0x86,0x04,0x0A,0xE3 + }; + + AES_SetKey(&ctx, key, sizeof(key)); + AES_Encrypt(&ctx, scratch, plaintext); + if (memcmp (scratch, ciphertext, sizeof (ciphertext))) + return "Rijndael-128 test encryption failed."; + + AES_SetKey(&ctx, key_192, sizeof(key_192)); + AES_Encrypt(&ctx, scratch, plaintext_192); + if (memcmp (scratch, ciphertext_192, sizeof (ciphertext_192))) + return "Rijndael-192 test encryption failed."; + + AES_SetKey(&ctx, key_256, sizeof(key_256)); + AES_Encrypt(&ctx, scratch, plaintext_256); + if (memcmp (scratch, ciphertext_256, sizeof (ciphertext_256))) + return "Rijndael-256 test encryption failed."; + + return NULL; +} + +#ifndef TEST + +static boolean prng_enabled = false; +static RIJNDAEL_context prng_context; +static uint32_t prng_input_counter; +static uint32_t prng_values[4]; +static unsigned int prng_value_index = 0; + +// Initialize Pseudo-RNG using the specified 128-bit key. + +void PRNG_Start(prng_seed_t key) +{ + char *errormsg; + + errormsg = AES_SelfTest(); + + if (errormsg != NULL) + { + I_Error("Failed to initialize PRNG: %s", errormsg); + } + + AES_SetKey(&prng_context, key, sizeof(prng_seed_t)); + prng_value_index = 4; + prng_input_counter = 0; + prng_enabled = true; +} + +void PRNG_Stop(void) +{ + prng_enabled = false; +} + +// Generate a set of new PRNG values by encrypting a new block. + +static void PRNG_Generate(void) +{ + byte input[16], output[16]; + unsigned int i; + + // Input for the cipher is a consecutively increasing 32-bit counter. + + for (i = 0; i < 4; ++i) + { + input[4*i] = prng_input_counter & 0xff; + input[4*i + 1] = (prng_input_counter >> 8) & 0xff; + input[4*i + 2] = (prng_input_counter >> 16) & 0xff; + input[4*i + 3] = (prng_input_counter >> 24) & 0xff; + ++prng_input_counter; + } + + AES_Encrypt(&prng_context, output, input); + + for (i = 0; i < 4; ++i) + { + prng_values[i] = output[4*i] + | (output[4*i + 1] << 8) + | (output[4*i + 2] << 16) + | (output[4*i + 3] << 24); + } + + prng_value_index = 0; +} + +// Read a random 32-bit integer from the PRNG. + +unsigned int PRNG_Random(void) +{ + unsigned int result; + + if (!prng_enabled) + { + return 0; + } + + if (prng_value_index >= 4) + { + PRNG_Generate(); + } + + result = prng_values[prng_value_index]; + ++prng_value_index; + + return result; +} + + +#else /* #ifndef TEST */ + +int main(int argc, char *argv[]) +{ + char *errormsg; + + errormsg = AES_SelfTest(); + + if (errormsg == NULL) + { + printf("AES Self test passed.\n"); + return 0; + } + else + { + fprintf(stderr, "AES self test failed: %s\n", errormsg); + return 1; + } +} + +#endif |