diff options
Diffstat (limited to 'src/org/bouncycastle/math/ec/FpNafMultiplier.java')
-rw-r--r-- | src/org/bouncycastle/math/ec/FpNafMultiplier.java | 39 |
1 files changed, 0 insertions, 39 deletions
diff --git a/src/org/bouncycastle/math/ec/FpNafMultiplier.java b/src/org/bouncycastle/math/ec/FpNafMultiplier.java deleted file mode 100644 index 35e601d..0000000 --- a/src/org/bouncycastle/math/ec/FpNafMultiplier.java +++ /dev/null @@ -1,39 +0,0 @@ -package org.bouncycastle.math.ec; - -import java.math.BigInteger; - -/** - * Class implementing the NAF (Non-Adjacent Form) multiplication algorithm. - */ -class FpNafMultiplier implements ECMultiplier -{ - /** - * D.3.2 pg 101 - * @see org.bouncycastle.math.ec.ECMultiplier#multiply(org.bouncycastle.math.ec.ECPoint, java.math.BigInteger) - */ - public ECPoint multiply(ECPoint p, BigInteger k, PreCompInfo preCompInfo) - { - // TODO Probably should try to add this - // BigInteger e = k.mod(n); // n == order of p - BigInteger e = k; - BigInteger h = e.multiply(BigInteger.valueOf(3)); - - ECPoint neg = p.negate(); - ECPoint R = p; - - for (int i = h.bitLength() - 2; i > 0; --i) - { - R = R.twice(); - - boolean hBit = h.testBit(i); - boolean eBit = e.testBit(i); - - if (hBit != eBit) - { - R = R.add(hBit ? p : neg); - } - } - - return R; - } -} |