ScalarOps (I2P Anonymous Network - Java Documentation - Version 1.5.0)

All Superinterfaces:

Serializable

All Known Implementing Classes:

BigIntegerScalarOps, Ed25519ScalarOps
```
public interface ScalarOps
extends Serializable
```
Since:

0.9.15

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`byte[]`	`multiplyAndAdd(byte[] a, byte[] b, byte[] c)`	$r = (a * b + c) \bmod l$
`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 - the scalar to reduce
    
    Returns:
    
    $s \bmod l$
  - multiplyAndAdd
```
byte[] multiplyAndAdd(byte[] a,
                      byte[] b,
                      byte[] c)
```
    $r = (a * b + c) \bmod l$
    
    Parameters:
    
    a - a scalar
    
    b - a scalar
    
    c - a scalar
    
    Returns:
    
    $(a*b + c) \bmod l$