readme

一个towfish加密算法的源代码

                       Optimized ANSI C Diskette


Files on this diskette:

File Name           Description
========================================================================

README          This file

PLATFORM.H      Platform-specific definitions (e.g., endianness, rotates)

TABLE.H         Macros and tables for Twofish internal structures

AES.H           AES header file, function prototypes

DEBUG.H         Debug i/o macros and functions

TWOFISH2.C      Optimized ANSI C source code

TST2FISH.C      Test code, links with TWOFISH2.C to generate KAT/MCT

COMPILE.BAT     Batch file used to compile TST2FISH.EXE.  See this file for
                the set of compiler options used to optimize performance.
		Using this batch file should produce performance numbers
		very similar to those in listed in our paper.
                Run with -DDEBUG option to enable intermediate value file,
		(but performance will be affected).

TST2FISH.EXE    Executable 32-bit console app of TST2FISH.C and TWOFISH2.C
                linked together.

========================================================================

Notes:

The program TST2FISH.EXE will generate the full set of KAT/MCT/Tables 
files in the current directory, if run with the -M switch:

	TST2FISH -M

When run without command-line parameters, it will generate a partial MCT set,
since the full set takes a long time.  To generate the intermediate value 
test file, you must compile with the -DDEBUG option.

When run with a question mark character ('?') as a parameter, TST2FISH.EXE
will display a help screen of command line options.

It is recommended that the version of TST2FISH.EXE compiled with the
optimized ANSI C code be used to generate the full MCT file set, since
the reference version is considerably slower.

To try the various key scheduling tradeoffs, compile with the following
options:
	-DFULL_KEY	-- default, full key schedule, fastest encryption
	-DPART_KEY	-- partial keying (four 8-bit S-boxes)
	-DMIN_KEY	-- minimal keying (four partial 8-bit S-boxes)
	-DZERO_KEY	-- zero keying (no S-box precomputation)