arnaucube/blindsecp256k1-js
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Add even hex length before hashing 'm' for Go comp

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arnaucube
2021-02-11 23:14:28 +01:00
parent 049c0b58c8
commit 488b33e08a
4 changed files with 1205 additions and 9 deletions
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22
test/index.test.ts
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@@ -2,7 +2,7 @@ import * as assert from 'assert'
import * as BigInteger from 'bigi'
import { keccak256 } from '@ethersproject/keccak256'
import { pointFromHex, newKeyPair, newRequestParameters, blind, blindSign, unblind, verify, signatureFromHex, signatureToHex, messageToBigNumber, pointToHex } from '../src/index'
import { pointFromHex, newKeyPair, newRequestParameters, blind, blindSign, unblind, verify, signatureFromHex, signatureToHex, messageToBigNumber, pointToHex, ecparams, newBigFromString, evenHex } from '../src/index'
describe('keccak256', function () {
it('should hash strings and big numbers', async () => {
@@ -71,3 +71,23 @@ describe('import point from hex', function () {
assert.strictEqual(signatureToHex(signatureFromHex(originalSignatureHex)), originalSignatureHex)
})
})
describe('Test hash m odd bytes', function () {
it('should take odd hex value and prepare it (using evenHex) to be even for keccak256 input', async () => {
// This test is made with same values than
// https://github.com/arnaucube/go-blindsecp256k1 to ensure
// compatibility
let m = newBigFromString("3024162961766929396601888431330224482373544644288322432261208139289299439809")
let mHex = m.toString(16)
assert.strictEqual(57, mHex.substr(6).length)
let hHex = keccak256('0x' + evenHex(mHex).substr(6)).substr(2)
let h = BigInteger.fromHex(hHex)
assert.strictEqual("57523339312508913023232057765773019244858443678197951618720342803494056599369", h.toString())
mHex = m.toString(16) + "1234"
assert.strictEqual(67, mHex.length)
hHex = keccak256('0x' + evenHex(mHex)).substr(2)
h = BigInteger.fromHex(hHex)
assert.strictEqual("9697834584560956691445940439424778243200861871421750951058436814122640359156", h.toString())
})
})