From b0779efe006b54e91fb66b0e4cc4639718c6ea4f Mon Sep 17 00:00:00 2001
From: MITSUNARI Shigeo <herumi@nifty.com>
Date: Fri, 17 Mar 2017 19:52:05 +0900
Subject: add constant time sign SecretKey::signCT

---
 src/bls.cpp    | 7 +++++++
 src/bls_if.cpp | 4 ++++
 2 files changed, 11 insertions(+)

(limited to 'src')

diff --git a/src/bls.cpp b/src/bls.cpp
index 8679ea5..6adc493 100644
--- a/src/bls.cpp
+++ b/src/bls.cpp
@@ -381,6 +381,13 @@ void SecretKey::sign(Sign& sign, const std::string& m) const
 	HashAndMapToG1(Hm, m);
 	G1::mul(sign.getInner().sHm, Hm, getInner().s);
 }
+// constant time sign
+void SecretKey::signCT(Sign& sign, const std::string& m) const
+{
+	G1 Hm;
+	HashAndMapToG1(Hm, m);
+	G1::mulCT(sign.getInner().sHm, Hm, getInner().s);
+}
 
 void SecretKey::getPop(Sign& pop) const
 {
diff --git a/src/bls_if.cpp b/src/bls_if.cpp
index 8fd1a55..4080d70 100644
--- a/src/bls_if.cpp
+++ b/src/bls_if.cpp
@@ -134,6 +134,10 @@ void blsSecretKeySign(const blsSecretKey *sec, blsSign *sign, const char *m, siz
 {
 	((const bls::SecretKey*)sec)->sign(*(bls::Sign*)sign, std::string(m, size));
 }
+void blsSecretKeySignCT(const blsSecretKey *sec, blsSign *sign, const char *m, size_t size)
+{
+	((const bls::SecretKey*)sec)->signCT(*(bls::Sign*)sign, std::string(m, size));
+}
 
 void blsSecretKeySet(blsSecretKey *sec, const blsSecretKey* msk, size_t k, const blsId *id)
 {
-- 
cgit