diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/math/ec_gfp/point_gfp.cpp | 36 |
1 files changed, 14 insertions, 22 deletions
diff --git a/src/math/ec_gfp/point_gfp.cpp b/src/math/ec_gfp/point_gfp.cpp index 0bfff7d46..a6b35b18d 100644 --- a/src/math/ec_gfp/point_gfp.cpp +++ b/src/math/ec_gfp/point_gfp.cpp @@ -113,10 +113,6 @@ void PointGFp::add(const PointGFp& rhs, std::vector<BigInt>& ws_bn) BigInt& H = ws_bn[6]; BigInt& r = ws_bn[7]; - BigInt& x = ws_bn[8]; - BigInt& y = ws_bn[9]; - BigInt& z = ws_bn[10]; - monty_sqr(rhs_z2, rhs.coord_z); monty_mult(U1, coord_x, rhs_z2); monty_mult(S1, coord_y, monty_mult(rhs.coord_z, rhs_z2)); @@ -153,26 +149,22 @@ void PointGFp::add(const PointGFp& rhs, std::vector<BigInt>& ws_bn) U2 = monty_mult(U1, U2); - monty_sqr(x, r); - x -= S2; - x -= (U2 << 1); - while(x.is_negative()) - x += p; + monty_sqr(coord_x, r); + coord_x -= S2; + coord_x -= (U2 << 1); + while(coord_x.is_negative()) + coord_x += p; - U2 -= x; + U2 -= coord_x; if(U2.is_negative()) U2 += p; - monty_mult(y, r, U2); - y -= monty_mult(S1, S2); - if(y.is_negative()) - y += p; + monty_mult(coord_y, r, U2); + coord_y -= monty_mult(S1, S2); + if(coord_y.is_negative()) + coord_y += p; - monty_mult(z, monty_mult(coord_z, rhs.coord_z), H); - - coord_x = x; - coord_y = y; - coord_z = z; + monty_mult(coord_z, monty_mult(coord_z, rhs.coord_z), H); } // *this *= 2 @@ -245,7 +237,7 @@ void PointGFp::mult2(std::vector<BigInt>& ws_bn) // arithmetic operators PointGFp& PointGFp::operator+=(const PointGFp& rhs) { - std::vector<BigInt> ws(11); + std::vector<BigInt> ws(9); add(rhs, ws); return *this; } @@ -276,7 +268,7 @@ PointGFp multi_exponentiate(const PointGFp& p1, const BigInt& z1, PointGFp H(p1.curve); // create as zero size_t bits_left = std::max(z1.bits(), z2.bits()); - std::vector<BigInt> ws(11); + std::vector<BigInt> ws(9); while(bits_left) { @@ -308,7 +300,7 @@ PointGFp operator*(const BigInt& scalar, const PointGFp& point) if(scalar.is_zero()) return PointGFp(curve); // zero point - std::vector<BigInt> ws(11); + std::vector<BigInt> ws(9); if(scalar.abs() <= 2) // special cases for small values { |