Class BigIntegerScalarOps

    • Constructor Detail

      • BigIntegerScalarOps

        public BigIntegerScalarOps​(Field f,
                                   BigInteger l)
    • Method Detail

      • reduce

        public byte[] reduce​(byte[] s)
        Description copied from interface: ScalarOps
        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}.

        Specified by:
        reduce in interface ScalarOps
        Returns:
        s mod l
      • multiplyAndAdd

        public byte[] multiplyAndAdd​(byte[] a,
                                     byte[] b,
                                     byte[] c)
        Description copied from interface: ScalarOps
        r = (a * b + c) mod l
        Specified by:
        multiplyAndAdd in interface ScalarOps
        Returns:
        (a*b + c) mod l