net.i2p.crypto.eddsa.math

Interface ScalarOps

All Known Implementing Classes:

BigIntegerScalarOps, Ed25519ScalarOps

public interface ScalarOps

Method Summary

Methods

Modifier and Type	Method and Description
byte[]	multiplyAndAdd(byte[] a, byte[] b, byte[] c) r = (a * b + c) mod l
byte[]	reduce(byte[] s) Reduce the given scalar mod l.

Method Detail

reduce

byte[] reduce(byte[] s)

Reduce the given scalar mod l. From the Ed25519 paper: Here we interpret 2b-bit strings in little-endian form as integers in {0, 1,..., 2^(2b)-1}.

Parameters:

s -

Returns:

s mod l

multiplyAndAdd

byte[] multiplyAndAdd(byte[] a,
                    byte[] b,
                    byte[] c)

r = (a * b + c) mod l

Parameters:

a -

b -

c -

Returns:

(a*b + c) mod l