curve-config.md

curve25519 (in Weierstrass form)

For more details about this curve, please see the README in the root folder.

In any case, this curve can be used like any other curve in the elliptic package. See the examples below.

const curve = new EC('curve25519-weier')

We define the curve inside src/ec-elgamal/curve.ts.

// activeCurve.ts
const EC = require('elliptic').ec
const curve25519 = new EC('curve25519-weier')
export const curveDefinition = curve25519
export const curve = curveDefinition.curve

Curve Configuration

defineCurve('curve25519-weier', {
  type: 'short',
  prime: 'p25519',
  p: '7fffffffffffffff ffffffffffffffff ffffffffffffffff ffffffffffffffed',
  a: '2aaaaaaaaaaaaaaa aaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaa aaaaaa984914a144',
  b: '7b425ed097b425ed 097b425ed097b425 ed097b425ed097b4 260b5e9c7710c864',
  n: '1000000000000000 0000000000000000 14def9dea2f79cd6 5812631a5cf5d3ed',
  hash: hash.sha256,
  gRed: false,
  g: [
    '2aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaad245a',
    '20ae19a1b8a086b4e01edd2c7748d14c923d4d7e6d7c61b229e9c5a27eced3d9',
  ],
})