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WjCryptLib is a collection of cryptographic functions written in C. Eachmodule is fully independent and generally requires only a single .c fileand a a single .h file. AES-CTR does depend on the AES module, so in thiscase all four files are needed.

The functions are designed to be portable and have been tested on botha Little-Endian and a Big-Endian architecture. OpenMP is supported whereparallelisation can occur.

The library and the demo programs can be built using CMake to generatea build setup for any system, including Visual Studio on Windows andMake or Ninja for Linux. Refer to cmake.org to get CMake.

Placed into Public Domain by WaterJuice 2013 - 2018

To use the library functions, only the following files are required,depending on what cryptographic functions are wanted.

• MD5 - (WjCryptLib_Md5.h, and WjCryptLib_Md5.c)
• SHA1 - (WjCryptLib_Sha1.h, and WjCryptLib_Sha1.c)
• SHA256 - (WjCryptLib_Sha256.h, and WjCryptLib_Sha256.c)
• SHA512 - (WjCryptLib_Sha512.h, and WjCryptLib_Sha512.c)
• RC4 - (WjCryptLib_Rc4.h, and WjCryptLib_Rc4.c)
• AES - (WjCryptLib_Aes.h, and WjCryptLib_Aes.c)
• AES-CTR - (WjCryptLib_AesCtr.h, and WjCryptLib_AesCtr.c, WjCryptLib_Aes.h,and WjCryptLib_Aes.c)
• AES-OFB - (WjCryptLib_AesOfb.h, and WjCryptLib_AesOfb.c, WjCryptLib_Aes.h,and WjCryptLib_Aes.c)
• AES-CBC - (WjCryptLib_AesCbc.h, and WjCryptLib_AesCbc.c, WjCryptLib_Aes.h,and WjCryptLib_Aes.c)

• Added AES-CBC module.
• Added functions Md5Calculate, Sha1Calculate, Sha256Calculate, andSha512Calculate to calculate a hash in one call.
• Added function Rc4XorWithKey to encrypt/decrypt a buffer with RC4 inone call.
• Bugfix: AesInitialise now returns -1 if invalid key size is provided.Previously it would return 0 despite what was documented.

• Added AES-OFB module.
• File names have been changed to have the prefixWjCryptLib_ ratherthanCryptLib_.
• Removed compiled binaries from source tree.

Changes:

• Changed implementation of AES to one which is almost 5 times as fast.The new implementation comes from LibTomCrypt. The newer implementationproduces a larger binary size as a trade-off.
• AES-CTR module now supports OpenMP and when compiled with OpenMP willrun in parallel giving a much greater speed.
• Changed interface for Initialisation functions for both AES and AES-CTRto be match RC4 (The context is first parameter not last)

Changes:

• Added AES and AES-CTR modules. AES-CTR conforms to the same countermode used with AES inOpenSSL.
• All algorithms now work on Big-Endian architectures.
• Now uses CMake for building rather than make files and Visual Studioprojects. CMake will generate whatever system is required.
• Input function parameters are now markedconst
• File names have been changed to have the prefixCryptLib_ ratherthanLib.
• Various formatting changes to the files.

Contains following algorithms:

• MD5
• SHA1
• SHA256
• SHA512
• RC4

In the projects directory there are several programs that compile tocommand line executables. One is WjCryptLibTest. This tests the algorithmsagainst known test vectors. If compiling on a different system thisis useful to verify that the results are still valid.

Additionally there are sample programs that demonstrate the functions. Foreach of the hash functions there is a program that creates a hash from astring given on command line. For RC4 and AES-CTR there are programs thatoutput the stream in hex.

• Md5String
• Sha1String
• Sha256String
• Sha512String
• Rc4Output
• AesBlock
• AesCtrOutput
• AesOfbOutput

This is free and unencumbered software released into the public domain.

Anyone is free to copy, modify, publish, use, compile, sell, ordistribute this software, either in source code form or as a compiledbinary, for any purpose, commercial or non-commercial, and by anymeans.

In jurisdictions that recognize copyright laws, the author or authorsof this software dedicate any and all copyright interest in thesoftware to the public domain. We make this dedication for the benefitof the public at large and to the detriment of our heirs andsuccessors. We intend this dedication to be an overt act ofrelinquishment in perpetuity of all present and future rights to thissoftware under copyright law.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OFMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OROTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OROTHER DEALINGS IN THE SOFTWARE.

For more information, please refer tohttp://unlicense.org/