added tests for privateKey/publicKey

lib/hdkey.js

@@ -45,7 +45,7 @@ Object.defineProperty(HDKey.prototype, 'publicKey', {
   },
   set: function(value) {
     assert(value.length === 33 || value.length === 65, 'Public key must be 33 or 65 bytes.')
-    var pt = Point.decodeFrom(ecparams.curve, value)
+    var pt = Point.decodeFrom(ecparams, value)
     this._publicKey = pt.getEncoded(true) //force compressed point
     this._privateKey = null
     this._privateKeyInteger = null

package.json

@@ -25,7 +25,8 @@
     "bs58": "^1.0.0",
     "coveralls": "^2.10.0",
     "mocha-lcov-reporter": "0.0.1",
-    "istanbul": "^0.2.10"
+    "istanbul": "^0.2.10",
+    "secure-random": "^1.0.0"
   },
   "dependencies": {
     "sha512": "0.0.1",

test/hdkey.test.js

@@ -1,8 +1,12 @@
 var assert = require('assert')
 var crypto = require('crypto')
+var BigInteger = require('bigi')
 var bs58 = require('bs58')
-var HDKey = require('../')
+var ecurve = require('ecurve')
+var secureRandom = require('secure-random')
+var ecparams = ecurve.getCurveByName('secp256k1')
 
+var HDKey = require('../')
 var fixtures = require('./fixtures/hdkey')
 
 function encode(buf) {
@@ -24,4 +28,38 @@ describe('hdkey', function() {
       })    
     }) 
   })
+
+  describe('- privateKey', function() {
+    it('should throw an error if incorrect key size', function() {
+      var hdkey = new HDKey()
+      assert.throws(function() {
+        hdkey.privateKey = new Buffer([1,2,3,4])  
+      },/key must be 32/)           
+    })
+  })
+
+  describe('- publicKey', function() {
+    it('should throw an error if incorrect key size', function() {
+      assert.throws(function() {
+        var hdkey = new HDKey()
+        hdkey.publicKey = new Buffer([1,2,3,4])
+      },/key must be 33 or 65/)
+    })
+
+    it('should not throw if key is 33 bytes (compressed)', function() {
+      var priv = secureRandom.randomBuffer(32)
+      var pub = ecparams.params.G.multiply(BigInteger.fromBuffer(priv)).getEncoded(true)
+      assert.equal(pub.length, 33)
+      var hdkey = new HDKey()
+      hdkey.publicKey = pub
+    })
+
+    it('should not throw if key is 65 bytes (not compressed)', function() {
+      var priv = secureRandom.randomBuffer(32)
+      var pub = ecparams.params.G.multiply(BigInteger.fromBuffer(priv)).getEncoded(false)
+      assert.equal(pub.length, 65)
+      var hdkey = new HDKey()
+      hdkey.publicKey = pub
+    })
+  })
 })