bitcoinjs-lib/test/ecpubkey.js

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var assert = require('assert')
var crypto = require('../src/crypto')
var sec = require('../src/sec')
var ecparams = sec('secp256k1')
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var BigInteger = require('bigi')
var ECPointFp = require('../src/ec').ECPointFp
var ECPubKey = require('../src/ecpubkey')
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var fixtures = require('./fixtures/ecpubkey')
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describe('ECPubKey', function() {
var Q
beforeEach(function() {
var curve = ecparams.getCurve()
Q = new ECPointFp(
curve,
curve.fromBigInteger(new BigInteger(fixtures.Q.x)),
curve.fromBigInteger(new BigInteger(fixtures.Q.y))
)
})
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describe('constructor', function() {
it('defaults to compressed', function() {
var pubKey = new ECPubKey(Q)
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assert.equal(pubKey.compressed, true)
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})
it('supports the uncompressed flag', function() {
var pubKey = new ECPubKey(Q, false)
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assert.equal(pubKey.compressed, false)
})
})
describe('fromHex/toHex', function() {
it('supports compressed points', function() {
var pubKey = ECPubKey.fromHex(fixtures.compressed.hex)
assert(pubKey.Q.equals(Q))
assert.equal(pubKey.toHex(), fixtures.compressed.hex)
assert.equal(pubKey.compressed, true)
})
it('supports uncompressed points', function() {
var pubKey = ECPubKey.fromHex(fixtures.uncompressed.hex)
assert(pubKey.Q.equals(Q))
assert.equal(pubKey.toHex(), fixtures.uncompressed.hex)
assert.equal(pubKey.compressed, false)
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})
})
describe('getAddress', function() {
it('calculates the expected hash (compressed)', function() {
var pubKey = new ECPubKey(Q, true)
var address = pubKey.getAddress()
assert.equal(address.hash.toString('hex'), fixtures.compressed.hash160)
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})
it('calculates the expected hash (uncompressed)', function() {
var pubKey = new ECPubKey(Q, false)
var address = pubKey.getAddress()
assert.equal(address.hash.toString('hex'), fixtures.uncompressed.hash160)
})
it('supports alternative networks', function() {
var pubKey = new ECPubKey(Q)
var address = pubKey.getAddress(0x09)
assert.equal(address.version, 0x09)
assert.equal(address.hash.toString('hex'), fixtures.compressed.hash160)
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})
})
describe('verify', function() {
var pubKey, signature
beforeEach(function() {
pubKey = new ECPubKey(Q)
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signature = {
r: new BigInteger(fixtures.signature.r),
s: new BigInteger(fixtures.signature.s)
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}
})
it('verifies a valid signature', function() {
var hash = crypto.sha256(fixtures.message)
assert.ok(pubKey.verify(hash, signature))
})
it('doesn\'t verify the wrong signature', function() {
var hash = crypto.sha256('mushrooms')
assert.ok(!pubKey.verify(hash, signature))
})
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})
})