ec: add better test vectors for ECPointFp encode/decode

These test vectors were generated internally.
This commit is contained in:
Daniel Cousens 2014-05-16 23:17:46 +10:00
commit 1c76bdf9c3
2 changed files with 102 additions and 12 deletions
test

View file

@ -6,6 +6,8 @@ var ecparams = sec('secp256k1')
var BigInteger = require('bigi')
var ECPointFp = require('../src/ec').ECPointFp
var fixtures = require('./fixtures/ec.js')
describe('ec', function() {
describe('ECPointFp', function() {
it('behaves correctly', function() {
@ -22,21 +24,49 @@ describe('ec', function() {
assert.ok(P.validate(), "kG validates as a public key")
})
})
describe('decodeFrom', function() {
it('decodes compressed ECPoints', function() {
var s = new Buffer('02789ece95adf35fb3de994b8b16c90166736d70913a18378fff79503e8c5db7fb', 'hex')
var Q = ECPointFp.decodeFrom(ecparams.getCurve(), s)
assert.ok(Q)
assert.ok(Q.validate())
describe('getEncoded', function() {
it('encodes a point correctly', function() {
fixtures.valid.ECPointFp.forEach(function(f) {
var curve = ecparams.getCurve()
var Q = new ECPointFp(
curve,
curve.fromBigInteger(new BigInteger(f.x)),
curve.fromBigInteger(new BigInteger(f.y))
)
var encoded = new Buffer(Q.getEncoded(f.compressed))
assert.equal(encoded.toString('hex'), f.hex)
})
})
})
it('decodes uncompressed ECPoints', function() {
var s = new Buffer('0486f356006a38b847bedec1bf47013776925d939d5a35a97a4d1263e550c7f1ab5aba44ab74d22892097a0e851addf07ba97e33416df5affaceeb35d5607cd23c', 'hex')
var Q = ECPointFp.decodeFrom(ecparams.getCurve(), s)
assert.ok(Q)
assert.ok(Q.validate())
describe('decodeFrom', function() {
it('decodes the correct point', function() {
fixtures.valid.ECPointFp.forEach(function(f) {
var curve = ecparams.getCurve()
var buffer = new Buffer(f.hex, 'hex')
var decoded = ECPointFp.decodeFrom(curve, buffer)
assert.equal(decoded.getX().toBigInteger().toString(), f.x)
assert.equal(decoded.getY().toBigInteger().toString(), f.y)
// TODO
// assert.equal(decoded.compressed, f.compressed)
})
})
// FIXME
// fixtures.invalid.ECPointFp.forEach(function(f) {
// it('throws on ' + f.description, function() {
// var curve = ecparams.getCurve()
// var buffer = new Buffer(f.hex, 'hex')
//
// assert.throws(function() {
// ECPointFp.decodeFrom(curve, buffer)
// })
// })
// })
})
})
})