Bouncy Castle Cryptography Library 1.80 · org.bouncycastle.math.ec.WTauNafMultiplier

Modifier and Type	Field and Description
pack-priv static final String	PRECOMP_NAME

Access	Constructor and Description
public	WTauNafMultiplier()

Method Summary

Modifier and Type	Method and Description
private static ECPoint.AbstractF2m	Returns: `λ * p` multiplyFromWTnaf(final ECPoint.AbstractF2m The ECPoint.AbstractF2m to multiply. p, byte[] The the WTNAF of `λ`.. u) Multiplies a `ECPoint.AbstractF2m` by an element `λ` of `Z[τ]` using the window `τ`-adic NAF (TNAF) method, given the WTNAF of `λ`.
protected ECPoint	Returns: `p` multiplied by `k`. multiplyPositive(ECPoint The ECPoint.AbstractF2m to multiply. point, BigInteger The integer by which to multiply `k`. k) Implements abstract org.bouncycastle.math.ec.AbstractECMultiplier.multiplyPositive. Multiplies a `ECPoint.AbstractF2m` by `k` using the reduced `τ`-adic NAF (RTNAF) method.
private ECPoint.AbstractF2m	Returns: `p` multiplied by `λ`. multiplyWTnaf(ECPoint.AbstractF2m The ECPoint.AbstractF2m to multiply. p, ZTauElement The element `λ` of `Z[τ]` of which to compute the `[τ]`-adic NAF. lambda, byte a, byte mu) Multiplies a `ECPoint.AbstractF2m` by an element `λ` of `Z[τ]` using the `τ`-adic NAF (TNAF) method.

Inherited from org.bouncycastle.math.ec.AbstractECMultiplier:: checkResult multiply

PRECOMP_NAME	back to summary
pack-priv static final String PRECOMP_NAME

WTauNafMultiplier	back to summary
public WTauNafMultiplier()

multiplyFromWTnaf back to summary

multiplyFromWTnaf	back to summary
private static ECPoint.AbstractF2m multiplyFromWTnaf(final ECPoint.AbstractF2m p, byte[] u) Multiplies a `ECPoint.AbstractF2m` by an element `λ` of `Z[τ]` using the window `τ`-adic NAF (TNAF) method, given the WTNAF of `λ`. Parameters p:ECPoint.AbstractF2m The ECPoint.AbstractF2m to multiply. u:byte[] The the WTNAF of `λ`.. Returns:ECPoint.AbstractF2m `λ * p`

private static ECPoint.AbstractF2m multiplyFromWTnaf(final ECPoint.AbstractF2m p, byte[] u)

Multiplies a ECPoint.AbstractF2m by an element λ of Z[τ] using the window τ-adic NAF (TNAF) method, given the WTNAF of λ.

Parameters

λ * p

multiplyPositive back to summary

multiplyPositive	back to summary
protected ECPoint multiplyPositive(ECPoint point, BigInteger k) Implements abstract org.bouncycastle.math.ec.AbstractECMultiplier.multiplyPositive. Multiplies a `ECPoint.AbstractF2m` by `k` using the reduced `τ`-adic NAF (RTNAF) method. Parameters point:ECPoint The ECPoint.AbstractF2m to multiply. k:BigInteger The integer by which to multiply `k`. Returns:ECPoint `p` multiplied by `k`.

protected ECPoint multiplyPositive(ECPoint point, BigInteger k)

Multiplies a ECPoint.AbstractF2m by k using the reduced τ-adic NAF (RTNAF) method.

Parameters

Returns:ECPoint

p multiplied by k.

multiplyWTnaf back to summary

multiplyWTnaf	back to summary
private ECPoint.AbstractF2m multiplyWTnaf(ECPoint.AbstractF2m p, ZTauElement lambda, byte a, byte mu) Multiplies a `ECPoint.AbstractF2m` by an element `λ` of `Z[τ]` using the `τ`-adic NAF (TNAF) method. Parameters p:ECPoint.AbstractF2m The ECPoint.AbstractF2m to multiply. lambda:ZTauElement The element `λ` of `Z[τ]` of which to compute the `[τ]`-adic NAF. Returns:ECPoint.AbstractF2m `p` multiplied by `λ`.

private ECPoint.AbstractF2m multiplyWTnaf(ECPoint.AbstractF2m p, ZTauElement lambda, byte a, byte mu)

Multiplies a ECPoint.AbstractF2m by an element λ of Z[τ] using the τ-adic NAF (TNAF) method.

Parameters

p:ECPoint.AbstractF2m: The ECPoint.AbstractF2m to multiply.
lambda:ZTauElement: The element λ of Z[τ] of which to compute the [τ]-adic NAF.

p multiplied by λ.