forked from Mirrorlandia_minetest/irrlicht
2ae2a551a6
GLES drivers adapted, but only did make compile-tests. git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/branches/ogl-es@6038 dfc29bdd-3216-0410-991c-e03cc46cb475
956 lines
36 KiB
C
956 lines
36 KiB
C
/*
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---------------------------------------------------------------------------
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Copyright (c) 2003, Dr Brian Gladman < >, Worcester, UK.
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All rights reserved.
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LICENSE TERMS
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The free distribution and use of this software in both source and binary
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form is allowed (with or without changes) provided that:
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1. distributions of this source code include the above copyright
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notice, this list of conditions and the following disclaimer;
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2. distributions in binary form include the above copyright
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notice, this list of conditions and the following disclaimer
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in the documentation and/or other associated materials;
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3. the copyright holder's name is not used to endorse products
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built using this software without specific written permission.
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ALTERNATIVELY, provided that this notice is retained in full, this product
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may be distributed under the terms of the GNU General Public License (GPL),
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in which case the provisions of the GPL apply INSTEAD OF those given above.
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DISCLAIMER
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This software is provided 'as is' with no explicit or implied warranties
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in respect of its properties, including, but not limited to, correctness
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and/or fitness for purpose.
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---------------------------------------------------------------------------
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Issue Date: 26/08/2003
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My thanks go to Dag Arne Osvik for devising the schemes used here for key
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length derivation from the form of the key schedule
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This file contains the compilation options for AES (Rijndael) and code
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that is common across encryption, key scheduling and table generation.
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OPERATION
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These source code files implement the AES algorithm Rijndael designed by
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Joan Daemen and Vincent Rijmen. This version is designed for the standard
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block size of 16 bytes and for key sizes of 128, 192 and 256 bits (16, 24
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and 32 bytes).
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This version is designed for flexibility and speed using operations on
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32-bit words rather than operations on bytes. It can be compiled with
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either big or little endian internal byte order but is faster when the
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native byte order for the processor is used.
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THE CIPHER INTERFACE
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The cipher interface is implemented as an array of bytes in which lower
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AES bit sequence indexes map to higher numeric significance within bytes.
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aes_08t (an unsigned 8-bit type)
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aes_32t (an unsigned 32-bit type)
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struct aes_encrypt_ctx (structure for the cipher encryption context)
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struct aes_decrypt_ctx (structure for the cipher decryption context)
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aes_rval the function return type
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C subroutine calls:
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aes_rval aes_encrypt_key128(const void *in_key, aes_encrypt_ctx cx[1]);
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aes_rval aes_encrypt_key192(const void *in_key, aes_encrypt_ctx cx[1]);
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aes_rval aes_encrypt_key256(const void *in_key, aes_encrypt_ctx cx[1]);
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aes_rval aes_encrypt(const void *in_blk,
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void *out_blk, const aes_encrypt_ctx cx[1]);
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aes_rval aes_decrypt_key128(const void *in_key, aes_decrypt_ctx cx[1]);
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aes_rval aes_decrypt_key192(const void *in_key, aes_decrypt_ctx cx[1]);
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aes_rval aes_decrypt_key256(const void *in_key, aes_decrypt_ctx cx[1]);
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aes_rval aes_decrypt(const void *in_blk,
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void *out_blk, const aes_decrypt_ctx cx[1]);
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IMPORTANT NOTE: If you are using this C interface with dynamic tables make sure that
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you call genTabs() before AES is used so that the tables are initialised.
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C++ aes class subroutines:
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Class AESencrypt for encryption
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Construtors:
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AESencrypt(void)
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AESencrypt(const void *in_key) - 128 bit key
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Members:
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void key128(const void *in_key)
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void key192(const void *in_key)
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void key256(const void *in_key)
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void encrypt(const void *in_blk, void *out_blk) const
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Class AESdecrypt for encryption
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Construtors:
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AESdecrypt(void)
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AESdecrypt(const void *in_key) - 128 bit key
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Members:
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void key128(const void *in_key)
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void key192(const void *in_key)
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void key256(const void *in_key)
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void decrypt(const void *in_blk, void *out_blk) const
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COMPILATION
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The files used to provide AES (Rijndael) are
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a. aes.h for the definitions needed for use in C.
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b. aescpp.h for the definitions needed for use in C++.
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c. aesopt.h for setting compilation options (also includes common code).
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d. aescrypt.c for encryption and decrytpion, or
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e. aeskey.c for key scheduling.
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f. aestab.c for table loading or generation.
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g. aescrypt.asm for encryption and decryption using assembler code.
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h. aescrypt.mmx.asm for encryption and decryption using MMX assembler.
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To compile AES (Rijndael) for use in C code use aes.h and set the
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defines here for the facilities you need (key lengths, encryption
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and/or decryption). Do not define AES_DLL or AES_CPP. Set the options
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for optimisations and table sizes here.
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To compile AES (Rijndael) for use in in C++ code use aescpp.h but do
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not define AES_DLL
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To compile AES (Rijndael) in C as a Dynamic Link Library DLL) use
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aes.h and include the AES_DLL define.
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CONFIGURATION OPTIONS (here and in aes.h)
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a. set AES_DLL in aes.h if AES (Rijndael) is to be compiled as a DLL
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b. You may need to set PLATFORM_BYTE_ORDER to define the byte order.
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c. If you want the code to run in a specific internal byte order, then
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ALGORITHM_BYTE_ORDER must be set accordingly.
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d. set other configuration options decribed below.
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*/
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#ifndef _AESOPT_H
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#define _AESOPT_H
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#include "aes.h"
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/* CONFIGURATION - USE OF DEFINES
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Later in this section there are a number of defines that control the
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operation of the code. In each section, the purpose of each define is
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explained so that the relevant form can be included or excluded by
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setting either 1's or 0's respectively on the branches of the related
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#if clauses.
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*/
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/* BYTE ORDER IN 32-BIT WORDS
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To obtain the highest speed on processors with 32-bit words, this code
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needs to determine the byte order of the target machine. The following
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block of code is an attempt to capture the most obvious ways in which
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various environemnts define byte order. It may well fail, in which case
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the definitions will need to be set by editing at the points marked
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**** EDIT HERE IF NECESSARY **** below. My thanks to Peter Gutmann for
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some of these defines (from cryptlib).
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*/
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#define BRG_LITTLE_ENDIAN 1234 /* byte 0 is least significant (i386) */
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#define BRG_BIG_ENDIAN 4321 /* byte 0 is most significant (mc68k) */
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#ifdef __BIG_ENDIAN__
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#define PLATFORM_BYTE_ORDER BRG_BIG_ENDIAN
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#else
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#define PLATFORM_BYTE_ORDER BRG_LITTLE_ENDIAN
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#endif
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/* SOME LOCAL DEFINITIONS */
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#define NO_TABLES 0
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#define ONE_TABLE 1
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#define FOUR_TABLES 4
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#define NONE 0
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#define PARTIAL 1
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#define FULL 2
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#define aes_sw32 Byteswap::byteswap
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/* 1. FUNCTIONS REQUIRED
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This implementation provides subroutines for encryption, decryption
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and for setting the three key lengths (separately) for encryption
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and decryption. When the assembler code is not being used the following
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definition blocks allow the selection of the routines that are to be
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included in the compilation.
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*/
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#ifdef AES_ENCRYPT
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#define ENCRYPTION
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#define ENCRYPTION_KEY_SCHEDULE
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#endif
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#ifdef AES_DECRYPT
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#define DECRYPTION
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#define DECRYPTION_KEY_SCHEDULE
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#endif
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/* 2. ASSEMBLER SUPPORT
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This define (which can be on the command line) enables the use of the
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assembler code routines for encryption and decryption with the C code
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only providing key scheduling
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*/
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#if 0
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#define AES_ASM
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#endif
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/* 3. BYTE ORDER WITHIN 32 BIT WORDS
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The fundamental data processing units in Rijndael are 8-bit bytes. The
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input, output and key input are all enumerated arrays of bytes in which
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bytes are numbered starting at zero and increasing to one less than the
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number of bytes in the array in question. This enumeration is only used
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for naming bytes and does not imply any adjacency or order relationship
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from one byte to another. When these inputs and outputs are considered
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as bit sequences, bits 8*n to 8*n+7 of the bit sequence are mapped to
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byte[n] with bit 8n+i in the sequence mapped to bit 7-i within the byte.
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In this implementation bits are numbered from 0 to 7 starting at the
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numerically least significant end of each byte (bit n represents 2^n).
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However, Rijndael can be implemented more efficiently using 32-bit
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words by packing bytes into words so that bytes 4*n to 4*n+3 are placed
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into word[n]. While in principle these bytes can be assembled into words
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in any positions, this implementation only supports the two formats in
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which bytes in adjacent positions within words also have adjacent byte
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numbers. This order is called big-endian if the lowest numbered bytes
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in words have the highest numeric significance and little-endian if the
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opposite applies.
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This code can work in either order irrespective of the order used by the
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machine on which it runs. Normally the internal byte order will be set
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to the order of the processor on which the code is to be run but this
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define can be used to reverse this in special situations
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NOTE: Assembler code versions rely on PLATFORM_BYTE_ORDER being set
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*/
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#if 1 || defined(AES_ASM)
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#define ALGORITHM_BYTE_ORDER PLATFORM_BYTE_ORDER
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#elif 0
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#define ALGORITHM_BYTE_ORDER BRG_LITTLE_ENDIAN
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#elif 0
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#define ALGORITHM_BYTE_ORDER BRG_BIG_ENDIAN
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#else
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#error The algorithm byte order is not defined
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#endif
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/* 4. FAST INPUT/OUTPUT OPERATIONS.
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On some machines it is possible to improve speed by transferring the
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bytes in the input and output arrays to and from the internal 32-bit
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variables by addressing these arrays as if they are arrays of 32-bit
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words. On some machines this will always be possible but there may
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be a large performance penalty if the byte arrays are not aligned on
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the normal word boundaries. On other machines this technique will
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lead to memory access errors when such 32-bit word accesses are not
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properly aligned. The option SAFE_IO avoids such problems but will
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often be slower on those machines that support misaligned access
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(especially so if care is taken to align the input and output byte
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arrays on 32-bit word boundaries). If SAFE_IO is not defined it is
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assumed that access to byte arrays as if they are arrays of 32-bit
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words will not cause problems when such accesses are misaligned.
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*/
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#if 1 && !defined(_MSC_VER)
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#define SAFE_IO
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#endif
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/* 5. LOOP UNROLLING
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The code for encryption and decrytpion cycles through a number of rounds
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that can be implemented either in a loop or by expanding the code into a
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long sequence of instructions, the latter producing a larger program but
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one that will often be much faster. The latter is called loop unrolling.
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There are also potential speed advantages in expanding two iterations in
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a loop with half the number of iterations, which is called partial loop
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unrolling. The following options allow partial or full loop unrolling
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to be set independently for encryption and decryption
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*/
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#if 1
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#define ENC_UNROLL FULL
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#elif 0
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#define ENC_UNROLL PARTIAL
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#else
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#define ENC_UNROLL NONE
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#endif
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#if 1
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#define DEC_UNROLL FULL
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#elif 0
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#define DEC_UNROLL PARTIAL
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#else
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#define DEC_UNROLL NONE
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#endif
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/* 6. FAST FINITE FIELD OPERATIONS
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If this section is included, tables are used to provide faster finite
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field arithmetic (this has no effect if FIXED_TABLES is defined).
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*/
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#if 0
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#define FF_TABLES
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#endif
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/* 7. INTERNAL STATE VARIABLE FORMAT
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The internal state of Rijndael is stored in a number of local 32-bit
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word varaibles which can be defined either as an array or as individual
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names variables. Include this section if you want to store these local
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varaibles in arrays. Otherwise individual local variables will be used.
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*/
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#if 1
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#define ARRAYS
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#endif
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/* In this implementation the columns of the state array are each held in
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32-bit words. The state array can be held in various ways: in an array
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of words, in a number of individual word variables or in a number of
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processor registers. The following define maps a variable name x and
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a column number c to the way the state array variable is to be held.
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The first define below maps the state into an array x[c] whereas the
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second form maps the state into a number of individual variables x0,
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x1, etc. Another form could map individual state colums to machine
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register names.
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*/
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#if defined(ARRAYS)
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#define s(x,c) x[c]
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#else
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#define s(x,c) x##c
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#endif
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/* 8. FIXED OR DYNAMIC TABLES
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When this section is included the tables used by the code are compiled
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statically into the binary file. Otherwise the subroutine gen_tabs()
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must be called to compute them before the code is first used.
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*/
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#if 1
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#define FIXED_TABLES
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#define DO_TABLES
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#endif
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/* 9. TABLE ALIGNMENT
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On some systems speed will be improved by aligning the AES large lookup
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tables on particular boundaries. This define should be set to a power of
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two giving the desired alignment. It can be left undefined if alignment
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is not needed. This option is specific to the Microsft VC++ compiler -
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it seems to sometimes cause trouble for the VC++ version 6 compiler.
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*/
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#if 0 && defined(_MSC_VER) && (_MSC_VER >= 1300)
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#define TABLE_ALIGN 64
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#endif
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/* 10. INTERNAL TABLE CONFIGURATION
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This cipher proceeds by repeating in a number of cycles known as 'rounds'
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which are implemented by a round function which can optionally be speeded
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up using tables. The basic tables are each 256 32-bit words, with either
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one or four tables being required for each round function depending on
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how much speed is required. The encryption and decryption round functions
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are different and the last encryption and decrytpion round functions are
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different again making four different round functions in all.
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This means that:
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1. Normal encryption and decryption rounds can each use either 0, 1
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or 4 tables and table spaces of 0, 1024 or 4096 bytes each.
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2. The last encryption and decryption rounds can also use either 0, 1
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or 4 tables and table spaces of 0, 1024 or 4096 bytes each.
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Include or exclude the appropriate definitions below to set the number
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of tables used by this implementation.
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*/
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#if 1 /* set tables for the normal encryption round */
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#define ENC_ROUND FOUR_TABLES
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#elif 0
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#define ENC_ROUND ONE_TABLE
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#else
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#define ENC_ROUND NO_TABLES
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#endif
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#if 1 /* set tables for the last encryption round */
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#define LAST_ENC_ROUND FOUR_TABLES
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#elif 0
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#define LAST_ENC_ROUND ONE_TABLE
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#else
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#define LAST_ENC_ROUND NO_TABLES
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#endif
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#if 1 /* set tables for the normal decryption round */
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#define DEC_ROUND FOUR_TABLES
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#elif 0
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#define DEC_ROUND ONE_TABLE
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#else
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#define DEC_ROUND NO_TABLES
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#endif
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#if 1 /* set tables for the last decryption round */
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#define LAST_DEC_ROUND FOUR_TABLES
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#elif 0
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#define LAST_DEC_ROUND ONE_TABLE
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#else
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#define LAST_DEC_ROUND NO_TABLES
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#endif
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/* The decryption key schedule can be speeded up with tables in the same
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way that the round functions can. Include or exclude the following
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defines to set this requirement.
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*/
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#if 1
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#define KEY_SCHED FOUR_TABLES
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#elif 0
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#define KEY_SCHED ONE_TABLE
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#else
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#define KEY_SCHED NO_TABLES
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#endif
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/* END OF CONFIGURATION OPTIONS */
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#define RC_LENGTH (5 * (AES_BLOCK_SIZE / 4 - 2))
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/* Disable or report errors on some combinations of options */
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#if ENC_ROUND == NO_TABLES && LAST_ENC_ROUND != NO_TABLES
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#undef LAST_ENC_ROUND
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#define LAST_ENC_ROUND NO_TABLES
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#elif ENC_ROUND == ONE_TABLE && LAST_ENC_ROUND == FOUR_TABLES
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#undef LAST_ENC_ROUND
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#define LAST_ENC_ROUND ONE_TABLE
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#endif
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#if ENC_ROUND == NO_TABLES && ENC_UNROLL != NONE
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#undef ENC_UNROLL
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#define ENC_UNROLL NONE
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#endif
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#if DEC_ROUND == NO_TABLES && LAST_DEC_ROUND != NO_TABLES
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#undef LAST_DEC_ROUND
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#define LAST_DEC_ROUND NO_TABLES
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#elif DEC_ROUND == ONE_TABLE && LAST_DEC_ROUND == FOUR_TABLES
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#undef LAST_DEC_ROUND
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#define LAST_DEC_ROUND ONE_TABLE
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#endif
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#if DEC_ROUND == NO_TABLES && DEC_UNROLL != NONE
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#undef DEC_UNROLL
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#define DEC_UNROLL NONE
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#endif
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/* upr(x,n): rotates bytes within words by n positions, moving bytes to
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higher index positions with wrap around into low positions
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ups(x,n): moves bytes by n positions to higher index positions in
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words but without wrap around
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bval(x,n): extracts a byte from a word
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NOTE: The definitions given here are intended only for use with
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unsigned variables and with shift counts that are compile
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time constants
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*/
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#if (ALGORITHM_BYTE_ORDER == BRG_LITTLE_ENDIAN)
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#define upr(x,n) (((aes_32t)(x) << (8 * (n))) | ((aes_32t)(x) >> (32 - 8 * (n))))
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#define ups(x,n) ((aes_32t) (x) << (8 * (n)))
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#define bval(x,n) ((aes_08t)((x) >> (8 * (n))))
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#define bytes2word(b0, b1, b2, b3) \
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(((aes_32t)(b3) << 24) | ((aes_32t)(b2) << 16) | ((aes_32t)(b1) << 8) | (b0))
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#endif
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#if (ALGORITHM_BYTE_ORDER == BRG_BIG_ENDIAN)
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#define upr(x,n) (((aes_32t)(x) >> (8 * (n))) | ((aes_32t)(x) << (32 - 8 * (n))))
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#define ups(x,n) ((aes_32t) (x) >> (8 * (n))))
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#define bval(x,n) ((aes_08t)((x) >> (24 - 8 * (n))))
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#define bytes2word(b0, b1, b2, b3) \
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(((aes_32t)(b0) << 24) | ((aes_32t)(b1) << 16) | ((aes_32t)(b2) << 8) | (b3))
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#endif
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#if defined(SAFE_IO)
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#define word_in(x,c) bytes2word(((aes_08t*)(x)+4*c)[0], ((aes_08t*)(x)+4*c)[1], \
|
|
((aes_08t*)(x)+4*c)[2], ((aes_08t*)(x)+4*c)[3])
|
|
#define word_out(x,c,v) { ((aes_08t*)(x)+4*c)[0] = bval(v,0); ((aes_08t*)(x)+4*c)[1] = bval(v,1); \
|
|
((aes_08t*)(x)+4*c)[2] = bval(v,2); ((aes_08t*)(x)+4*c)[3] = bval(v,3); }
|
|
|
|
#elif (ALGORITHM_BYTE_ORDER == PLATFORM_BYTE_ORDER)
|
|
|
|
#define word_in(x,c) (*((aes_32t*)(x)+(c)))
|
|
#define word_out(x,c,v) (*((aes_32t*)(x)+(c)) = (v))
|
|
|
|
#else
|
|
|
|
#define word_in(x,c) aes_sw32(*((aes_32t*)(x)+(c)))
|
|
#define word_out(x,c,v) (*((aes_32t*)(x)+(c)) = aes_sw32(v))
|
|
|
|
#endif
|
|
|
|
/* the finite field modular polynomial and elements */
|
|
|
|
#define WPOLY 0x011b
|
|
#define BPOLY 0x1b
|
|
|
|
/* multiply four bytes in GF(2^8) by 'x' {02} in parallel */
|
|
|
|
#define m1 0x80808080
|
|
#define m2 0x7f7f7f7f
|
|
#define gf_mulx(x) ((((x) & m2) << 1) ^ ((((x) & m1) >> 7) * BPOLY))
|
|
|
|
/* The following defines provide alternative definitions of gf_mulx that might
|
|
give improved performance if a fast 32-bit multiply is not available. Note
|
|
that a temporary variable u needs to be defined where gf_mulx is used.
|
|
|
|
#define gf_mulx(x) (u = (x) & m1, u |= (u >> 1), ((x) & m2) << 1) ^ ((u >> 3) | (u >> 6))
|
|
#define m4 (0x01010101 * BPOLY)
|
|
#define gf_mulx(x) (u = (x) & m1, ((x) & m2) << 1) ^ ((u - (u >> 7)) & m4)
|
|
*/
|
|
|
|
/* Work out which tables are needed for the different options */
|
|
|
|
#ifdef AES_ASM
|
|
#ifdef ENC_ROUND
|
|
#undef ENC_ROUND
|
|
#endif
|
|
#define ENC_ROUND FOUR_TABLES
|
|
#ifdef LAST_ENC_ROUND
|
|
#undef LAST_ENC_ROUND
|
|
#endif
|
|
#define LAST_ENC_ROUND FOUR_TABLES
|
|
#ifdef DEC_ROUND
|
|
#undef DEC_ROUND
|
|
#endif
|
|
#define DEC_ROUND FOUR_TABLES
|
|
#ifdef LAST_DEC_ROUND
|
|
#undef LAST_DEC_ROUND
|
|
#endif
|
|
#define LAST_DEC_ROUND FOUR_TABLES
|
|
#ifdef KEY_SCHED
|
|
#undef KEY_SCHED
|
|
#define KEY_SCHED FOUR_TABLES
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(ENCRYPTION) || defined(AES_ASM)
|
|
#if ENC_ROUND == ONE_TABLE
|
|
#define FT1_SET
|
|
#elif ENC_ROUND == FOUR_TABLES
|
|
#define FT4_SET
|
|
#else
|
|
#define SBX_SET
|
|
#endif
|
|
#if LAST_ENC_ROUND == ONE_TABLE
|
|
#define FL1_SET
|
|
#elif LAST_ENC_ROUND == FOUR_TABLES
|
|
#define FL4_SET
|
|
#elif !defined(SBX_SET)
|
|
#define SBX_SET
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(DECRYPTION) || defined(AES_ASM)
|
|
#if DEC_ROUND == ONE_TABLE
|
|
#define IT1_SET
|
|
#elif DEC_ROUND == FOUR_TABLES
|
|
#define IT4_SET
|
|
#else
|
|
#define ISB_SET
|
|
#endif
|
|
#if LAST_DEC_ROUND == ONE_TABLE
|
|
#define IL1_SET
|
|
#elif LAST_DEC_ROUND == FOUR_TABLES
|
|
#define IL4_SET
|
|
#elif !defined(ISB_SET)
|
|
#define ISB_SET
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(ENCRYPTION_KEY_SCHEDULE) || defined(DECRYPTION_KEY_SCHEDULE)
|
|
#if KEY_SCHED == ONE_TABLE
|
|
#define LS1_SET
|
|
#define IM1_SET
|
|
#elif KEY_SCHED == FOUR_TABLES
|
|
#define LS4_SET
|
|
#define IM4_SET
|
|
#elif !defined(SBX_SET)
|
|
#define SBX_SET
|
|
#endif
|
|
#endif
|
|
|
|
/* generic definitions of Rijndael macros that use tables */
|
|
|
|
#define no_table(x,box,vf,rf,c) bytes2word( \
|
|
box[bval(vf(x,0,c),rf(0,c))], \
|
|
box[bval(vf(x,1,c),rf(1,c))], \
|
|
box[bval(vf(x,2,c),rf(2,c))], \
|
|
box[bval(vf(x,3,c),rf(3,c))])
|
|
|
|
#define one_table(x,op,tab,vf,rf,c) \
|
|
( tab[bval(vf(x,0,c),rf(0,c))] \
|
|
^ op(tab[bval(vf(x,1,c),rf(1,c))],1) \
|
|
^ op(tab[bval(vf(x,2,c),rf(2,c))],2) \
|
|
^ op(tab[bval(vf(x,3,c),rf(3,c))],3))
|
|
|
|
#define four_tables(x,tab,vf,rf,c) \
|
|
( tab[0][bval(vf(x,0,c),rf(0,c))] \
|
|
^ tab[1][bval(vf(x,1,c),rf(1,c))] \
|
|
^ tab[2][bval(vf(x,2,c),rf(2,c))] \
|
|
^ tab[3][bval(vf(x,3,c),rf(3,c))])
|
|
|
|
#define vf1(x,r,c) (x)
|
|
#define rf1(r,c) (r)
|
|
#define rf2(r,c) ((8+r-c)&3)
|
|
|
|
/* perform forward and inverse column mix operation on four bytes in long word x in */
|
|
/* parallel. NOTE: x must be a simple variable, NOT an expression in these macros. */
|
|
|
|
#if defined(FM4_SET) /* not currently used */
|
|
#define fwd_mcol(x) four_tables(x,t_use(f,m),vf1,rf1,0)
|
|
#elif defined(FM1_SET) /* not currently used */
|
|
#define fwd_mcol(x) one_table(x,upr,t_use(f,m),vf1,rf1,0)
|
|
#else
|
|
#define dec_fmvars aes_32t g2
|
|
#define fwd_mcol(x) (g2 = gf_mulx(x), g2 ^ upr((x) ^ g2, 3) ^ upr((x), 2) ^ upr((x), 1))
|
|
#endif
|
|
|
|
#if defined(IM4_SET)
|
|
#define inv_mcol(x) four_tables(x,t_use(i,m),vf1,rf1,0)
|
|
#elif defined(IM1_SET)
|
|
#define inv_mcol(x) one_table(x,upr,t_use(i,m),vf1,rf1,0)
|
|
#else
|
|
#define dec_imvars aes_32t g2, g4, g9
|
|
#define inv_mcol(x) (g2 = gf_mulx(x), g4 = gf_mulx(g2), g9 = (x) ^ gf_mulx(g4), g4 ^= g9, \
|
|
(x) ^ g2 ^ g4 ^ upr(g2 ^ g9, 3) ^ upr(g4, 2) ^ upr(g9, 1))
|
|
#endif
|
|
|
|
#if defined(FL4_SET)
|
|
#define ls_box(x,c) four_tables(x,t_use(f,l),vf1,rf2,c)
|
|
#elif defined(LS4_SET)
|
|
#define ls_box(x,c) four_tables(x,t_use(l,s),vf1,rf2,c)
|
|
#elif defined(FL1_SET)
|
|
#define ls_box(x,c) one_table(x,upr,t_use(f,l),vf1,rf2,c)
|
|
#elif defined(LS1_SET)
|
|
#define ls_box(x,c) one_table(x,upr,t_use(l,s),vf1,rf2,c)
|
|
#else
|
|
#define ls_box(x,c) no_table(x,t_use(s,box),vf1,rf2,c)
|
|
#endif
|
|
|
|
/* If there are no global variables, the definitions here can be
|
|
used to put the AES tables in a structure so that a pointer
|
|
can then be added to the AES context to pass them to the AES
|
|
routines that need them. If this facility is used, the calling
|
|
program has to ensure that this pointer is managed appropriately.
|
|
In particular, the value of the t_dec(in,it) item in the table
|
|
structure must be set to zero in order to ensure that the tables
|
|
are initialised. In practice the three code sequences in aeskey.c
|
|
that control the calls to gen_tabs() and the gen_tabs() routine
|
|
itself will have to be changed for a specific implementation. If
|
|
global variables are available it will generally be preferable to
|
|
use them with the precomputed FIXED_TABLES option that uses static
|
|
global tables.
|
|
|
|
The following defines can be used to control the way the tables
|
|
are defined, initialised and used in embedded environments that
|
|
require special features for these purposes
|
|
|
|
the 't_dec' construction is used to declare fixed table arrays
|
|
the 't_set' construction is used to set fixed table values
|
|
the 't_use' construction is used to access fixed table values
|
|
|
|
256 byte tables:
|
|
|
|
t_xxx(s,box) => forward S box
|
|
t_xxx(i,box) => inverse S box
|
|
|
|
256 32-bit word OR 4 x 256 32-bit word tables:
|
|
|
|
t_xxx(f,n) => forward normal round
|
|
t_xxx(f,l) => forward last round
|
|
t_xxx(i,n) => inverse normal round
|
|
t_xxx(i,l) => inverse last round
|
|
t_xxx(l,s) => key schedule table
|
|
t_xxx(i,m) => key schedule table
|
|
|
|
Other variables and tables:
|
|
|
|
t_xxx(r,c) => the rcon table
|
|
*/
|
|
|
|
#define t_dec(m,n) t_##m##n
|
|
#define t_set(m,n) t_##m##n
|
|
#define t_use(m,n) t_##m##n
|
|
|
|
#if defined(DO_TABLES) /* declare and instantiate tables */
|
|
|
|
/* finite field arithmetic operations for table generation */
|
|
|
|
#if defined(FIXED_TABLES) || !defined(FF_TABLES)
|
|
|
|
#define f2(x) ((x<<1) ^ (((x>>7) & 1) * WPOLY))
|
|
#define f4(x) ((x<<2) ^ (((x>>6) & 1) * WPOLY) ^ (((x>>6) & 2) * WPOLY))
|
|
#define f8(x) ((x<<3) ^ (((x>>5) & 1) * WPOLY) ^ (((x>>5) & 2) * WPOLY) \
|
|
^ (((x>>5) & 4) * WPOLY))
|
|
#define f3(x) (f2(x) ^ x)
|
|
#define f9(x) (f8(x) ^ x)
|
|
#define fb(x) (f8(x) ^ f2(x) ^ x)
|
|
#define fd(x) (f8(x) ^ f4(x) ^ x)
|
|
#define fe(x) (f8(x) ^ f4(x) ^ f2(x))
|
|
|
|
#else
|
|
|
|
#define f2(x) ((x) ? pow[log[x] + 0x19] : 0)
|
|
#define f3(x) ((x) ? pow[log[x] + 0x01] : 0)
|
|
#define f9(x) ((x) ? pow[log[x] + 0xc7] : 0)
|
|
#define fb(x) ((x) ? pow[log[x] + 0x68] : 0)
|
|
#define fd(x) ((x) ? pow[log[x] + 0xee] : 0)
|
|
#define fe(x) ((x) ? pow[log[x] + 0xdf] : 0)
|
|
#define fi(x) ((x) ? pow[ 255 - log[x]] : 0)
|
|
|
|
#endif
|
|
|
|
#if defined(FIXED_TABLES) /* declare and set values for static tables */
|
|
|
|
#define sb_data(w) \
|
|
w(0x63), w(0x7c), w(0x77), w(0x7b), w(0xf2), w(0x6b), w(0x6f), w(0xc5),\
|
|
w(0x30), w(0x01), w(0x67), w(0x2b), w(0xfe), w(0xd7), w(0xab), w(0x76),\
|
|
w(0xca), w(0x82), w(0xc9), w(0x7d), w(0xfa), w(0x59), w(0x47), w(0xf0),\
|
|
w(0xad), w(0xd4), w(0xa2), w(0xaf), w(0x9c), w(0xa4), w(0x72), w(0xc0),\
|
|
w(0xb7), w(0xfd), w(0x93), w(0x26), w(0x36), w(0x3f), w(0xf7), w(0xcc),\
|
|
w(0x34), w(0xa5), w(0xe5), w(0xf1), w(0x71), w(0xd8), w(0x31), w(0x15),\
|
|
w(0x04), w(0xc7), w(0x23), w(0xc3), w(0x18), w(0x96), w(0x05), w(0x9a),\
|
|
w(0x07), w(0x12), w(0x80), w(0xe2), w(0xeb), w(0x27), w(0xb2), w(0x75),\
|
|
w(0x09), w(0x83), w(0x2c), w(0x1a), w(0x1b), w(0x6e), w(0x5a), w(0xa0),\
|
|
w(0x52), w(0x3b), w(0xd6), w(0xb3), w(0x29), w(0xe3), w(0x2f), w(0x84),\
|
|
w(0x53), w(0xd1), w(0x00), w(0xed), w(0x20), w(0xfc), w(0xb1), w(0x5b),\
|
|
w(0x6a), w(0xcb), w(0xbe), w(0x39), w(0x4a), w(0x4c), w(0x58), w(0xcf),\
|
|
w(0xd0), w(0xef), w(0xaa), w(0xfb), w(0x43), w(0x4d), w(0x33), w(0x85),\
|
|
w(0x45), w(0xf9), w(0x02), w(0x7f), w(0x50), w(0x3c), w(0x9f), w(0xa8),\
|
|
w(0x51), w(0xa3), w(0x40), w(0x8f), w(0x92), w(0x9d), w(0x38), w(0xf5),\
|
|
w(0xbc), w(0xb6), w(0xda), w(0x21), w(0x10), w(0xff), w(0xf3), w(0xd2),\
|
|
w(0xcd), w(0x0c), w(0x13), w(0xec), w(0x5f), w(0x97), w(0x44), w(0x17),\
|
|
w(0xc4), w(0xa7), w(0x7e), w(0x3d), w(0x64), w(0x5d), w(0x19), w(0x73),\
|
|
w(0x60), w(0x81), w(0x4f), w(0xdc), w(0x22), w(0x2a), w(0x90), w(0x88),\
|
|
w(0x46), w(0xee), w(0xb8), w(0x14), w(0xde), w(0x5e), w(0x0b), w(0xdb),\
|
|
w(0xe0), w(0x32), w(0x3a), w(0x0a), w(0x49), w(0x06), w(0x24), w(0x5c),\
|
|
w(0xc2), w(0xd3), w(0xac), w(0x62), w(0x91), w(0x95), w(0xe4), w(0x79),\
|
|
w(0xe7), w(0xc8), w(0x37), w(0x6d), w(0x8d), w(0xd5), w(0x4e), w(0xa9),\
|
|
w(0x6c), w(0x56), w(0xf4), w(0xea), w(0x65), w(0x7a), w(0xae), w(0x08),\
|
|
w(0xba), w(0x78), w(0x25), w(0x2e), w(0x1c), w(0xa6), w(0xb4), w(0xc6),\
|
|
w(0xe8), w(0xdd), w(0x74), w(0x1f), w(0x4b), w(0xbd), w(0x8b), w(0x8a),\
|
|
w(0x70), w(0x3e), w(0xb5), w(0x66), w(0x48), w(0x03), w(0xf6), w(0x0e),\
|
|
w(0x61), w(0x35), w(0x57), w(0xb9), w(0x86), w(0xc1), w(0x1d), w(0x9e),\
|
|
w(0xe1), w(0xf8), w(0x98), w(0x11), w(0x69), w(0xd9), w(0x8e), w(0x94),\
|
|
w(0x9b), w(0x1e), w(0x87), w(0xe9), w(0xce), w(0x55), w(0x28), w(0xdf),\
|
|
w(0x8c), w(0xa1), w(0x89), w(0x0d), w(0xbf), w(0xe6), w(0x42), w(0x68),\
|
|
w(0x41), w(0x99), w(0x2d), w(0x0f), w(0xb0), w(0x54), w(0xbb), w(0x16)
|
|
|
|
#define isb_data(w) \
|
|
w(0x52), w(0x09), w(0x6a), w(0xd5), w(0x30), w(0x36), w(0xa5), w(0x38),\
|
|
w(0xbf), w(0x40), w(0xa3), w(0x9e), w(0x81), w(0xf3), w(0xd7), w(0xfb),\
|
|
w(0x7c), w(0xe3), w(0x39), w(0x82), w(0x9b), w(0x2f), w(0xff), w(0x87),\
|
|
w(0x34), w(0x8e), w(0x43), w(0x44), w(0xc4), w(0xde), w(0xe9), w(0xcb),\
|
|
w(0x54), w(0x7b), w(0x94), w(0x32), w(0xa6), w(0xc2), w(0x23), w(0x3d),\
|
|
w(0xee), w(0x4c), w(0x95), w(0x0b), w(0x42), w(0xfa), w(0xc3), w(0x4e),\
|
|
w(0x08), w(0x2e), w(0xa1), w(0x66), w(0x28), w(0xd9), w(0x24), w(0xb2),\
|
|
w(0x76), w(0x5b), w(0xa2), w(0x49), w(0x6d), w(0x8b), w(0xd1), w(0x25),\
|
|
w(0x72), w(0xf8), w(0xf6), w(0x64), w(0x86), w(0x68), w(0x98), w(0x16),\
|
|
w(0xd4), w(0xa4), w(0x5c), w(0xcc), w(0x5d), w(0x65), w(0xb6), w(0x92),\
|
|
w(0x6c), w(0x70), w(0x48), w(0x50), w(0xfd), w(0xed), w(0xb9), w(0xda),\
|
|
w(0x5e), w(0x15), w(0x46), w(0x57), w(0xa7), w(0x8d), w(0x9d), w(0x84),\
|
|
w(0x90), w(0xd8), w(0xab), w(0x00), w(0x8c), w(0xbc), w(0xd3), w(0x0a),\
|
|
w(0xf7), w(0xe4), w(0x58), w(0x05), w(0xb8), w(0xb3), w(0x45), w(0x06),\
|
|
w(0xd0), w(0x2c), w(0x1e), w(0x8f), w(0xca), w(0x3f), w(0x0f), w(0x02),\
|
|
w(0xc1), w(0xaf), w(0xbd), w(0x03), w(0x01), w(0x13), w(0x8a), w(0x6b),\
|
|
w(0x3a), w(0x91), w(0x11), w(0x41), w(0x4f), w(0x67), w(0xdc), w(0xea),\
|
|
w(0x97), w(0xf2), w(0xcf), w(0xce), w(0xf0), w(0xb4), w(0xe6), w(0x73),\
|
|
w(0x96), w(0xac), w(0x74), w(0x22), w(0xe7), w(0xad), w(0x35), w(0x85),\
|
|
w(0xe2), w(0xf9), w(0x37), w(0xe8), w(0x1c), w(0x75), w(0xdf), w(0x6e),\
|
|
w(0x47), w(0xf1), w(0x1a), w(0x71), w(0x1d), w(0x29), w(0xc5), w(0x89),\
|
|
w(0x6f), w(0xb7), w(0x62), w(0x0e), w(0xaa), w(0x18), w(0xbe), w(0x1b),\
|
|
w(0xfc), w(0x56), w(0x3e), w(0x4b), w(0xc6), w(0xd2), w(0x79), w(0x20),\
|
|
w(0x9a), w(0xdb), w(0xc0), w(0xfe), w(0x78), w(0xcd), w(0x5a), w(0xf4),\
|
|
w(0x1f), w(0xdd), w(0xa8), w(0x33), w(0x88), w(0x07), w(0xc7), w(0x31),\
|
|
w(0xb1), w(0x12), w(0x10), w(0x59), w(0x27), w(0x80), w(0xec), w(0x5f),\
|
|
w(0x60), w(0x51), w(0x7f), w(0xa9), w(0x19), w(0xb5), w(0x4a), w(0x0d),\
|
|
w(0x2d), w(0xe5), w(0x7a), w(0x9f), w(0x93), w(0xc9), w(0x9c), w(0xef),\
|
|
w(0xa0), w(0xe0), w(0x3b), w(0x4d), w(0xae), w(0x2a), w(0xf5), w(0xb0),\
|
|
w(0xc8), w(0xeb), w(0xbb), w(0x3c), w(0x83), w(0x53), w(0x99), w(0x61),\
|
|
w(0x17), w(0x2b), w(0x04), w(0x7e), w(0xba), w(0x77), w(0xd6), w(0x26),\
|
|
w(0xe1), w(0x69), w(0x14), w(0x63), w(0x55), w(0x21), w(0x0c), w(0x7d),
|
|
|
|
#define mm_data(w) \
|
|
w(0x00), w(0x01), w(0x02), w(0x03), w(0x04), w(0x05), w(0x06), w(0x07),\
|
|
w(0x08), w(0x09), w(0x0a), w(0x0b), w(0x0c), w(0x0d), w(0x0e), w(0x0f),\
|
|
w(0x10), w(0x11), w(0x12), w(0x13), w(0x14), w(0x15), w(0x16), w(0x17),\
|
|
w(0x18), w(0x19), w(0x1a), w(0x1b), w(0x1c), w(0x1d), w(0x1e), w(0x1f),\
|
|
w(0x20), w(0x21), w(0x22), w(0x23), w(0x24), w(0x25), w(0x26), w(0x27),\
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|
w(0x28), w(0x29), w(0x2a), w(0x2b), w(0x2c), w(0x2d), w(0x2e), w(0x2f),\
|
|
w(0x30), w(0x31), w(0x32), w(0x33), w(0x34), w(0x35), w(0x36), w(0x37),\
|
|
w(0x38), w(0x39), w(0x3a), w(0x3b), w(0x3c), w(0x3d), w(0x3e), w(0x3f),\
|
|
w(0x40), w(0x41), w(0x42), w(0x43), w(0x44), w(0x45), w(0x46), w(0x47),\
|
|
w(0x48), w(0x49), w(0x4a), w(0x4b), w(0x4c), w(0x4d), w(0x4e), w(0x4f),\
|
|
w(0x50), w(0x51), w(0x52), w(0x53), w(0x54), w(0x55), w(0x56), w(0x57),\
|
|
w(0x58), w(0x59), w(0x5a), w(0x5b), w(0x5c), w(0x5d), w(0x5e), w(0x5f),\
|
|
w(0x60), w(0x61), w(0x62), w(0x63), w(0x64), w(0x65), w(0x66), w(0x67),\
|
|
w(0x68), w(0x69), w(0x6a), w(0x6b), w(0x6c), w(0x6d), w(0x6e), w(0x6f),\
|
|
w(0x70), w(0x71), w(0x72), w(0x73), w(0x74), w(0x75), w(0x76), w(0x77),\
|
|
w(0x78), w(0x79), w(0x7a), w(0x7b), w(0x7c), w(0x7d), w(0x7e), w(0x7f),\
|
|
w(0x80), w(0x81), w(0x82), w(0x83), w(0x84), w(0x85), w(0x86), w(0x87),\
|
|
w(0x88), w(0x89), w(0x8a), w(0x8b), w(0x8c), w(0x8d), w(0x8e), w(0x8f),\
|
|
w(0x90), w(0x91), w(0x92), w(0x93), w(0x94), w(0x95), w(0x96), w(0x97),\
|
|
w(0x98), w(0x99), w(0x9a), w(0x9b), w(0x9c), w(0x9d), w(0x9e), w(0x9f),\
|
|
w(0xa0), w(0xa1), w(0xa2), w(0xa3), w(0xa4), w(0xa5), w(0xa6), w(0xa7),\
|
|
w(0xa8), w(0xa9), w(0xaa), w(0xab), w(0xac), w(0xad), w(0xae), w(0xaf),\
|
|
w(0xb0), w(0xb1), w(0xb2), w(0xb3), w(0xb4), w(0xb5), w(0xb6), w(0xb7),\
|
|
w(0xb8), w(0xb9), w(0xba), w(0xbb), w(0xbc), w(0xbd), w(0xbe), w(0xbf),\
|
|
w(0xc0), w(0xc1), w(0xc2), w(0xc3), w(0xc4), w(0xc5), w(0xc6), w(0xc7),\
|
|
w(0xc8), w(0xc9), w(0xca), w(0xcb), w(0xcc), w(0xcd), w(0xce), w(0xcf),\
|
|
w(0xd0), w(0xd1), w(0xd2), w(0xd3), w(0xd4), w(0xd5), w(0xd6), w(0xd7),\
|
|
w(0xd8), w(0xd9), w(0xda), w(0xdb), w(0xdc), w(0xdd), w(0xde), w(0xdf),\
|
|
w(0xe0), w(0xe1), w(0xe2), w(0xe3), w(0xe4), w(0xe5), w(0xe6), w(0xe7),\
|
|
w(0xe8), w(0xe9), w(0xea), w(0xeb), w(0xec), w(0xed), w(0xee), w(0xef),\
|
|
w(0xf0), w(0xf1), w(0xf2), w(0xf3), w(0xf4), w(0xf5), w(0xf6), w(0xf7),\
|
|
w(0xf8), w(0xf9), w(0xfa), w(0xfb), w(0xfc), w(0xfd), w(0xfe), w(0xff)
|
|
|
|
#define h0(x) (x)
|
|
|
|
/* These defines are used to ensure tables are generated in the
|
|
right format depending on the internal byte order required
|
|
*/
|
|
|
|
#define w0(p) bytes2word(p, 0, 0, 0)
|
|
#define w1(p) bytes2word(0, p, 0, 0)
|
|
#define w2(p) bytes2word(0, 0, p, 0)
|
|
#define w3(p) bytes2word(0, 0, 0, p)
|
|
|
|
#define u0(p) bytes2word(f2(p), p, p, f3(p))
|
|
#define u1(p) bytes2word(f3(p), f2(p), p, p)
|
|
#define u2(p) bytes2word(p, f3(p), f2(p), p)
|
|
#define u3(p) bytes2word(p, p, f3(p), f2(p))
|
|
|
|
#define v0(p) bytes2word(fe(p), f9(p), fd(p), fb(p))
|
|
#define v1(p) bytes2word(fb(p), fe(p), f9(p), fd(p))
|
|
#define v2(p) bytes2word(fd(p), fb(p), fe(p), f9(p))
|
|
#define v3(p) bytes2word(f9(p), fd(p), fb(p), fe(p))
|
|
|
|
const aes_32t t_dec(r,c)[RC_LENGTH] =
|
|
{
|
|
w0(0x01), w0(0x02), w0(0x04), w0(0x08), w0(0x10),
|
|
w0(0x20), w0(0x40), w0(0x80), w0(0x1b), w0(0x36)
|
|
};
|
|
|
|
#if defined(__BORLANDC__)
|
|
#define concat(s1, s2) s1##s2
|
|
#define d_1(t,n,b,v) const t n[256] = { b(concat(v,0)) }
|
|
#define d_4(t,n,b,v) const t n[4][256] = { { b(concat(v,0)) }, { b(concat(v,1)) }, { b(concat(v,2)) }, { b(concat(v,3)) } }
|
|
#else
|
|
#define d_1(t,n,b,v) const t n[256] = { b(v##0) }
|
|
#define d_4(t,n,b,v) const t n[4][256] = { { b(v##0) }, { b(v##1) }, { b(v##2) }, { b(v##3) } }
|
|
#endif
|
|
|
|
#else /* declare and instantiate tables for dynamic value generation in in tab.c */
|
|
|
|
aes_32t t_dec(r,c)[RC_LENGTH];
|
|
|
|
#define d_1(t,n,b,v) t n[256]
|
|
#define d_4(t,n,b,v) t n[4][256]
|
|
|
|
#endif
|
|
|
|
#else /* declare tables without instantiation */
|
|
|
|
#if defined(FIXED_TABLES)
|
|
|
|
extern const aes_32t t_dec(r,c)[RC_LENGTH];
|
|
|
|
#if defined(_MSC_VER) && defined(TABLE_ALIGN)
|
|
#define d_1(t,n,b,v) extern __declspec(align(TABLE_ALIGN)) const t n[256]
|
|
#define d_4(t,n,b,v) extern __declspec(align(TABLE_ALIGN)) const t n[4][256]
|
|
#else
|
|
#define d_1(t,n,b,v) extern const t n[256]
|
|
#define d_4(t,n,b,v) extern const t n[4][256]
|
|
#endif
|
|
#else
|
|
|
|
extern aes_32t t_dec(r,c)[RC_LENGTH];
|
|
|
|
#if defined(_MSC_VER) && defined(TABLE_ALIGN)
|
|
#define d_1(t,n,b,v) extern __declspec(align(TABLE_ALIGN)) t n[256]
|
|
#define d_4(t,n,b,v) extern __declspec(align(TABLE_ALIGN)) t n[4][256]
|
|
#else
|
|
#define d_1(t,n,b,v) extern t n[256]
|
|
#define d_4(t,n,b,v) extern t n[4][256]
|
|
#endif
|
|
#endif
|
|
|
|
#endif
|
|
|
|
#ifdef SBX_SET
|
|
d_1(aes_08t, t_dec(s,box), sb_data, h);
|
|
#endif
|
|
#ifdef ISB_SET
|
|
d_1(aes_08t, t_dec(i,box), isb_data, h);
|
|
#endif
|
|
|
|
#ifdef FT1_SET
|
|
d_1(aes_32t, t_dec(f,n), sb_data, u);
|
|
#endif
|
|
#ifdef FT4_SET
|
|
d_4(aes_32t, t_dec(f,n), sb_data, u);
|
|
#endif
|
|
|
|
#ifdef FL1_SET
|
|
d_1(aes_32t, t_dec(f,l), sb_data, w);
|
|
#endif
|
|
#ifdef FL4_SET
|
|
d_4(aes_32t, t_dec(f,l), sb_data, w);
|
|
#endif
|
|
|
|
#ifdef IT1_SET
|
|
d_1(aes_32t, t_dec(i,n), isb_data, v);
|
|
#endif
|
|
#ifdef IT4_SET
|
|
d_4(aes_32t, t_dec(i,n), isb_data, v);
|
|
#endif
|
|
|
|
#ifdef IL1_SET
|
|
d_1(aes_32t, t_dec(i,l), isb_data, w);
|
|
#endif
|
|
#ifdef IL4_SET
|
|
d_4(aes_32t, t_dec(i,l), isb_data, w);
|
|
#endif
|
|
|
|
#ifdef LS1_SET
|
|
#ifdef FL1_SET
|
|
#undef LS1_SET
|
|
#else
|
|
d_1(aes_32t, t_dec(l,s), sb_data, w);
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef LS4_SET
|
|
#ifdef FL4_SET
|
|
#undef LS4_SET
|
|
#else
|
|
d_4(aes_32t, t_dec(l,s), sb_data, w);
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef IM1_SET
|
|
d_1(aes_32t, t_dec(i,m), mm_data, v);
|
|
#endif
|
|
#ifdef IM4_SET
|
|
d_4(aes_32t, t_dec(i,m), mm_data, v);
|
|
#endif
|
|
|
|
#endif
|
|
|