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# mcl
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A class library of finite field and elliptic curve.
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# Abstract
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This is a library to make a protocol for elliptic curve cryptography.
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This library contains [mie](https://github.com/herumi/mie/) and [Lifted-ElGamal](https://github.com/aistcrypt/Lifted-ElGamal/).
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# Installation Requirements
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Create a working directory (e.g., work) and clone the following repositories.
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```
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mkdir work
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cd work
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git clone git://github.com/herumi/xbyak.git
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git clone git://github.com/herumi/cybozulib.git
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git clone git://github.com/herumi/cybozulib_ext.git
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```
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* Cybozulib_ext is a prerequisite for running OpenSSL and GMP on VC (Visual C++).
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* Xbyak is a prerequisite for optimizing the operations in the finite field on Intel CPUs.
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* OpenSSL and libgmp-dev are available via apt-get (or other similar commands) if using Linux.
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# Build and test
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To make lib/libmcl.a and test, run
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```
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make test
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```
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To make sample programs, run
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```
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make sample
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```
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## Build for 32-bit Linux
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Build openssl and gmp for 32-bit mode and install <lib32>
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```
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cd mcl
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make BIT=32 CFLAGS_USER="-I <lib32>/include" LDFLAGS_USER="-L <lib32>/lib -Wl,-rpath,<lib32>/lib"
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```
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## Build for 64-bit Windows
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open mcl.sln and build or if you have msbuild.exe
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```
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msbuild /p:Configuration=Release
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```
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### Build with LLVM
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require clang 3.8 or over.
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```
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make USE_LLVM=1 LLVM_VER=-3.8
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```
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# License
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modified new BSD License
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http://opensource.org/licenses/BSD-3-Clause
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The original source of the followings are https://github.com/aistcrypt/Lifted-ElGamal .
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These files are licensed by BSD-3-Clause and are used for only tests.
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```
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include/mcl/elgamal.hpp
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include/mcl/window_method.hpp
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test/elgamal_test.cpp
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test/window_method_test.cpp
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sample/vote.cpp
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```
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# References
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* [ate-pairing](https://github.com/herumi/ate-pairing/)
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* [_Faster Explicit Formulas for Computing Pairings over Ordinary Curves_](http://dx.doi.org/10.1007/978-3-642-20465-4_5),
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D.F. Aranha, K. Karabina, P. Longa, C.H. Gebotys, J. Lopez,
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EUROCRYPTO 2011, ([preprint](http://eprint.iacr.org/2010/526))
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* [_High-Speed Software Implementation of the Optimal Ate Pairing over Barreto-Naehrig Curves_](http://dx.doi.org/10.1007/978-3-642-17455-1_2),
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Jean-Luc Beuchat, Jorge Enrique González Díaz, Shigeo Mitsunari, Eiji Okamoto, Francisco Rodríguez-Henríquez, Tadanori Teruya,
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Pairing 2010, ([preprint](http://eprint.iacr.org/2010/354))
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* [_Faster hashing to G2_](http://dx.doi.org/10.1007/978-3-642-28496-0_25),Laura Fuentes-Castañeda, Edward Knapp, Francisco Rodríguez-Henríquez,
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SAC 2011, ([preprint](https://eprint.iacr.org/2008/530))
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# Author
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光成滋生 MITSUNARI Shigeo(herumi@nifty.com)
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