add random.hpp and ahe.hpp

2 files changed, 109 insertions, 0 deletions

diff --git a/include/mcl/ahe.hpp b/include/mcl/ahe.hpp
new file mode 100644
index 0000000..4848160
--- /dev/null
+++ b/include/mcl/ahe.hpp
@@ -0,0 +1,75 @@
+#pragma once
+/**
+	@file
+	@brief 192/256-bit additive homomorphic encryption by lifted-ElGamal
+	@author MITSUNARI Shigeo(@herumi)
+	@license modified new BSD license
+	http://opensource.org/licenses/BSD-3-Clause
+*/
+#include <mcl/elgamal.hpp>
+#include <mcl/ecparam.hpp>
+#include <mcl/random.hpp>
+
+namespace mcl {
+
+#ifdef MCL_USE_AHE192
+namespace ahe192 {
+
+const mcl::EcParam& para = mcl::ecparam::NIST_P192;
+
+typedef mcl::FpT<mcl::FpTag, 192> Fp;
+typedef mcl::FpT<mcl::ZnTag, 192> Zn;
+typedef mcl::EcT<Fp> Ec;
+typedef mcl::ElgamalT<Ec, Zn> ElgamalEc;
+typedef ElgamalEc::PrivateKey SecretKey;
+typedef ElgamalEc::PublicKey PublicKey;
+typedef ElgamalEc::CipherText CipherText;
+
+static inline void ahe192init()
+{
+	Fp::init(para.p);
+	Zn::init(para.n);
+	Ec::init(para.a, para.b);
+//	Fp::setIoMode(mcl::IoArrayRaw);
+}
+
+static inline void initSecretKey(SecretKey& sec)
+{
+	const Ec P(Fp(para.gx), Fp(para.gy));
+	sec.init(P, Zn::getBitSize(), mcl::getRandomGenerator());
+}
+
+} //mcl::ahe192
+#endif
+
+#ifdef MCL_USE_AHE256
+namespace ahe256 {
+
+const mcl::EcParam& para = mcl::ecparam::NIST_P256;
+
+typedef mcl::FpT<mcl::FpTag, 256> Fp;
+typedef mcl::FpT<mcl::ZnTag, 256> Zn;
+typedef mcl::EcT<Fp> Ec;
+typedef mcl::ElgamalT<Ec, Zn> ElgamalEc;
+typedef ElgamalEc::PrivateKey SecretKey;
+typedef ElgamalEc::PublicKey PublicKey;
+typedef ElgamalEc::CipherText CipherText;
+
+static inline void ahe256init()
+{
+	Fp::init(para.p);
+	Zn::init(para.n);
+	Ec::init(para.a, para.b);
+//	Fp::setIoMode(mcl::IoArrayRaw);
+}
+
+static inline void initSecretKey(SecretKey& sec)
+{
+	const Ec P(Fp(para.gx), Fp(para.gy));
+	sec.init(P, Zn::getBitSize(), mcl::getRandomGenerator());
+}
+
+} //mcl::ahe256
+#endif
+
+} //  mcl
diff --git a/include/mcl/random.hpp b/include/mcl/random.hpp
new file mode 100644
index 0000000..504b3f7
--- /dev/null
+++ b/include/mcl/random.hpp
@@ -0,0 +1,34 @@
+#pragma once
+/**
+	@file
+	@brief random generator
+	@author MITSUNARI Shigeo(@herumi)
+	@license modified new BSD license
+	http://opensource.org/licenses/BSD-3-Clause
+*/
+
+#if CYBOZU_CPP_VERSION >= CYBOZU_CPP_VERSION_CPP11
+#include <random>
+#else
+#include <cybozu/random_generator.hpp>
+#endif
+
+namespace mcl {
+
+#if CYBOZU_CPP_VERSION >= CYBOZU_CPP_VERSION_CPP11
+inline std::random_device& getRandomGenerator()
+{
+	static std::random_device rd;
+	return rd;
+}
+#else
+
+inline cybozu::RandomGenerator& getRandomGenerator()
+{
+	static cybozu::RandomGenerator rg;
+	return rg;
+}
+
+#endif
+
+} // mcl