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ec: add better test vectors for ECPointFp encode/decode

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These test vectors were generated internally.
This commit is contained in:
Daniel Cousens 2014-05-16 23:17:46 +10:00
parent 4c7108d561
commit 1c76bdf9c3
2 changed files with 102 additions and 12 deletions
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54
test/ec.js
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)
// })
// })
// })
})
})
})

60
test/fixtures/ec.js vendored Normal file
View file

@ -0,0 +1,60 @@
module.exports = {
"valid": {
"ECPointFp": [
{
"x": "55066263022277343669578718895168534326250603453777594175500187360389116729240",
"y": "32670510020758816978083085130507043184471273380659243275938904335757337482424",
"compressed": false,
"hex": "0479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8"
},
{
"x": "55066263022277343669578718895168534326250603453777594175500187360389116729240",
"y": "32670510020758816978083085130507043184471273380659243275938904335757337482424",
"compressed": true,
"hex": "0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798"
},
{
"x": "83225686012142088543596389522774768397204444195709443235253141114409346958144",
"y": "23739058578904784236915560265041168694780215705543362357495033621678991351768",
"compressed": true,
"hex": "02b80011a883a0fd621ad46dfc405df1e74bf075cbaf700fd4aebef6e96f848340"
},
{
"x": "30095590000961171681152428142595206241714764354580127609094760797518133922356",
"y": "93521207164355458151597931319591130635754976513751247168472016818884561919702",
"compressed": true,
"hex": "024289801366bcee6172b771cf5a7f13aaecd237a0b9a1ff9d769cabc2e6b70a34"
},
{
"x": "55066263022277343669578718895168534326250603453777594175500187360389116729240",
"y": "83121579216557378445487899878180864668798711284981320763518679672151497189239",
"compressed": true,
"hex": "0379be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798"
}
]
},
"invalid": {
"ECPointFp": [
{
"description": "Invalid sequence tag",
"hex": "0179be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798"
},
{
"description": "Sequence too short",
"hex": "0479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10"
},
{
"description": "Sequence too short (compressed)",
"hex": "0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f8"
},
{
"description": "Sequence too long",
"hex": "0479be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b80000"
},
{
"description": "Sequence too long (compressed)",
"hex": "0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f817980000"
}
]
}
}