1 files changed, 70 insertions, 0 deletions
diff --git a/vendor/github.com/dexon-foundation/mcl/sample/bls_sig.cpp b/vendor/github.com/dexon-foundation/mcl/sample/bls_sig.cpp
new file mode 100644
index 000000000..d75f7d427
--- /dev/null
+++ b/vendor/github.com/dexon-foundation/mcl/sample/bls_sig.cpp
@@ -0,0 +1,70 @@
+/**
+	@file
+	@brief a sample of BLS signature
+	see https://github.com/herumi/bls
+	@author MITSUNARI Shigeo(@herumi)
+	@license modified new BSD license
+	http://opensource.org/licenses/BSD-3-Clause
+
+*/
+#include <mcl/bn256.hpp>
+#include <iostream>
+
+using namespace mcl::bn256;
+
+void Hash(G1& P, const std::string& m)
+{
+	Fp t;
+	t.setHashOf(m);
+	mapToG1(P, t);
+}
+
+void KeyGen(Fr& s, G2& pub, const G2& Q)
+{
+	s.setRand();
+	G2::mul(pub, Q, s); // pub = sQ
+}
+
+void Sign(G1& sign, const Fr& s, const std::string& m)
+{
+	G1 Hm;
+	Hash(Hm, m);
+	G1::mul(sign, Hm, s); // sign = s H(m)
+}
+
+bool Verify(const G1& sign, const G2& Q, const G2& pub, const std::string& m)
+{
+	Fp12 e1, e2;
+	G1 Hm;
+	Hash(Hm, m);
+	pairing(e1, sign, Q); // e1 = e(sign, Q)
+	pairing(e2, Hm, pub); // e2 = e(Hm, sQ)
+	return e1 == e2;
+}
+
+int main(int argc, char *argv[])
+{
+	std::string m = argc == 1 ? "hello mcl" : argv[1];
+
+	// setup parameter
+	initPairing();
+	G2 Q;
+	mapToG2(Q, 1);
+
+	// generate secret key and public key
+	Fr s;
+	G2 pub;
+	KeyGen(s, pub, Q);
+	std::cout << "secret key " << s << std::endl;
+	std::cout << "public key " << pub << std::endl;
+
+	// sign
+	G1 sign;
+	Sign(sign, s, m);
+	std::cout << "msg " << m << std::endl;
+	std::cout << "sign " << sign << std::endl;
+
+	// verify
+	bool ok = Verify(sign, Q, pub, m);
+	std::cout << "verify " << (ok ? "ok" : "ng") << std::endl;
+}