Replacse JSBN with bigi

README.md

@@ -122,11 +122,6 @@ BitcoinJS (c) 2011-2012 Stefan Thomas
 Released under MIT license
 http://bitcoinjs.org/
 
-JSBN (c) 2003-2005 Tom Wu
-Released under BSD license
-http://www-cs-students.stanford.edu/~tjw/jsbn/
-
 CryptoJS (c) 2009–2012 by Jeff Mott
 Released under New BSD license
 http://code.google.com/p/crypto-js/
-

package.json

@@ -42,6 +42,7 @@
     "compile": "./node_modules/.bin/browserify ./src/index.js -s Bitcoin | ./node_modules/.bin/uglifyjs > bitcoinjs-min.js"
   },
   "dependencies": {
+    "bigi": "0.2.0",
     "crypto-js": "3.1.2-3",
     "secure-random": "0.2.1"
   }

src/base58.js

@@ -5,7 +5,7 @@
 // Merged Buffer refactorings from base58-native by Stephen Pair
 // Copyright (c) 2013 BitPay Inc
 
-var BigInteger = require('./jsbn/jsbn')
+var BigInteger = require('./bigi')
 
 var ALPHABET = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
 var ALPHABET_BUF = new Buffer(ALPHABET, 'ascii')
@@ -16,7 +16,7 @@ for(var i = 0; i < ALPHABET.length; i++) {
 var BASE = BigInteger.valueOf(58)
 
 function encode(buffer) {
-  var bi = BigInteger.fromByteArrayUnsigned(buffer)
+  var bi = BigInteger.fromBuffer(buffer)
   var result = new Buffer(buffer.length << 1)
 
   var i = result.length - 1

src/bigi.js

@@ -0,0 +1,13 @@
+var assert = require('assert')
+var BigInteger = require('bigi')
+
+BigInteger.fromBuffer = function(buffer) {
+  // FIXME: Transitionary
+  if (Buffer.isBuffer(buffer)) {
+    buffer = Array.prototype.slice.call(buffer)
+  }
+
+  return BigInteger.fromByteArrayUnsigned(buffer)
+}
+
+module.exports = BigInteger

src/ec.js

@@ -2,13 +2,8 @@
 // Ported loosely from BouncyCastle's Java EC code
 // Only Fp curves implemented for now
 
-var BigInteger = require('./jsbn'),
+var BigInteger = require('./bigi')
-    sec = require('./sec');
 
-// ----------------
-// ECFieldElementFp
-
-// constructor
 function ECFieldElementFp(q,x) {
     this.x = x;
     // TODO if(x.compareTo(q) >= 0) error
@@ -343,12 +338,12 @@ ECPointFp.decodeFrom = function (curve, enc) {
   if (type == 4) {
     var xBa = enc.slice(1, 1 + dataLen/2),
         yBa = enc.slice(1 + dataLen/2, 1 + dataLen),
-        x = BigInteger.fromByteArrayUnsigned(xBa),
+        x = BigInteger.fromBuffer(xBa),
-        y = BigInteger.fromByteArrayUnsigned(yBa);
+        y = BigInteger.fromBuffer(yBa);
   }
   else {
     var xBa = enc.slice(1),
-        x = BigInteger.fromByteArrayUnsigned(xBa),
+        x = BigInteger.fromBuffer(xBa),
         p = curve.getQ(),
         xCubedPlus7 = x.multiply(x).multiply(x).add(new BigInteger('7')).mod(p),
         pPlus1Over4 = p.add(new BigInteger('1'))

src/ecdsa.js

@@ -1,10 +1,12 @@
-var sec = require('./jsbn/sec')
+var BigInteger = require('./bigi')
-var rng = require('secure-random')
+var ECPointFp = require('./ec').ECPointFp
-var BigInteger = require('./jsbn/jsbn')
+
 var convert = require('./convert')
 var HmacSHA256 = require('crypto-js/hmac-sha256')
-var ECPointFp = require('./jsbn/ec').ECPointFp
+
+var sec = require('./sec')
 var ecparams = sec("secp256k1")
+
 var P_OVER_FOUR = null
 
 function implShamirsTrick(P, k, Q, l) {
@@ -48,14 +50,14 @@ function deterministicGenerateK(hash,key) {
   v = HmacSHA256(v,k)
   v = HmacSHA256(v,k)
   vArr = convert.wordArrayToBytes(v)
-  return BigInteger.fromByteArrayUnsigned(vArr)
+  return BigInteger.fromBuffer(vArr)
 }
 
 var ecdsa = {
   sign: function (hash, priv) {
     var d = priv
     var n = ecparams.getN()
-    var e = BigInteger.fromByteArrayUnsigned(hash)
+    var e = BigInteger.fromBuffer(hash)
 
     var k = deterministicGenerateK(hash,priv.toByteArrayUnsigned())
     var G = ecparams.getG()
@@ -93,7 +95,7 @@ var ecdsa = {
     } else {
       throw new Error("Invalid format for pubkey value, must be byte array or ECPointFp")
     }
-    var e = BigInteger.fromByteArrayUnsigned(hash)
+    var e = BigInteger.fromBuffer(hash)
 
     return ecdsa.verifyRaw(e, r, s, Q)
   },
@@ -183,8 +185,8 @@ var ecdsa = {
     //if (cursor != sig.length)
     //  throw new Error("Extra bytes in signature")
 
-    var r = BigInteger.fromByteArrayUnsigned(rBa)
+    var r = BigInteger.fromBuffer(rBa)
-    var s = BigInteger.fromByteArrayUnsigned(sBa)
+    var s = BigInteger.fromBuffer(sBa)
 
     return {r: r, s: s}
   },
@@ -202,8 +204,8 @@ var ecdsa = {
     }
 
     var n = ecparams.getN()
-    var r = BigInteger.fromByteArrayUnsigned(sig.slice(1, 33)).mod(n)
+    var r = BigInteger.fromBuffer(sig.slice(1, 33)).mod(n)
-    var s = BigInteger.fromByteArrayUnsigned(sig.slice(33, 65)).mod(n)
+    var s = BigInteger.fromBuffer(sig.slice(33, 65)).mod(n)
 
     return {r: r, s: s, i: i}
   },
@@ -257,7 +259,7 @@ var ecdsa = {
     R.validate()
 
     // 1.5 Compute e from M
-    var e = BigInteger.fromByteArrayUnsigned(hash)
+    var e = BigInteger.fromBuffer(hash)
     var eNeg = BigInteger.ZERO.subtract(e).mod(n)
 
     // 1.6 Compute Q = r^-1 (sR - eG)

src/eckey.js

@@ -7,11 +7,11 @@ var secureRandom = require('secure-random')
 var Address = require('./address')
 var crypto = require('./crypto')
 
-var sec = require('./jsbn/sec')
+var sec = require('./sec')
 var ecparams = sec('secp256k1')
 
-var BigInteger = require('./jsbn/jsbn')
+var BigInteger = require('./bigi')
-var ECPointFp = require('./jsbn/ec').ECPointFp
+var ECPointFp = require('./ec').ECPointFp
 
 function ECKey(D, compressed) {
   assert(D.compareTo(BigInteger.ZERO) > 0, 'Private key must be greater than 0')
@@ -28,7 +28,7 @@ ECKey.fromBuffer = function(buffer, compressed) {
   assert(Buffer.isBuffer(buffer), 'First argument must be a Buffer')
   assert.strictEqual(buffer.length, 32, 'Invalid buffer length')
 
-  var D = BigInteger.fromByteArrayUnsigned(buffer)
+  var D = BigInteger.fromBuffer(buffer)
   return new ECKey(D, compressed)
 }
 ECKey.fromHex = function(hex, compressed) {
@@ -52,7 +52,7 @@ ECKey.makeRandom = function(compressed, rng) {
   rng = rng || secureRandom
 
   var buffer = new Buffer(rng(32))
-  var D = BigInteger.fromByteArrayUnsigned(buffer)
+  var D = BigInteger.fromBuffer(buffer)
   D = D.mod(ecparams.getN())
 
   return new ECKey(D, compressed)

src/hdwallet.js

@@ -3,14 +3,14 @@ var base58 = require('./base58')
 var convert = require('./convert')
 
 var Address = require('./address')
-var BigInteger = require('./jsbn/jsbn')
+var BigInteger = require('./bigi')
 var CJS = require('crypto-js')
 var crypto = require('./crypto')
 var ECKey = require('./eckey').ECKey
 var ECPubKey = require('./eckey').ECPubKey
 var Network = require('./network')
 
-var sec = require('./jsbn/sec')
+var sec = require('./sec')
 var ecparams = sec("secp256k1")
 
 function HmacSHA512(buffer, secret) {
@@ -215,7 +215,7 @@ HDWallet.prototype.derive = function(i) {
   var hd = new HDWallet()
   hd.network = this.network
 
-  var IL = BigInteger.fromByteArrayUnsigned(ILb)
+  var IL = BigInteger.fromBuffer(ILb)
 
   if (this.priv) {
     // ki = IL + kpar (mod n).

src/index.js

@@ -1,3 +1,4 @@
+var ec = require('./ec')
 var Key = require('./eckey')
 var T = require('./transaction')
 
@@ -5,17 +6,19 @@ module.exports = {
   Address: require('./address'),
   base58: require('./base58'),
   base58check: require('./base58check'),
-  BigInteger: require('./jsbn/jsbn'),
+  BigInteger: require('./bigi'),
   convert: require('./convert'),
   crypto: require('./crypto'),
+  ec: ec,
   ecdsa: require('./ecdsa'),
   ECKey: Key.ECKey,
-  ECPointFp: require('./jsbn/ec').ECPointFp,
+  ECPointFp: ec.ECPointFp,
   ECPubKey: Key.ECPubKey,
   Message: require('./message'),
   Opcode: require('./opcode'),
   HDWallet: require('./hdwallet'),
   Script: require('./script'),
+  sec: require('./sec'),
   Transaction: T.Transaction,
   TransactionIn: T.TransactionIn,
   TransactionOut: T.TransactionOut,

src/sec.js

@@ -1,8 +1,8 @@
 // Named EC curves
 
+var BigInteger = require('./bigi')
 var ECCurveFp = require('./ec')
-var ECPointFp = require('./ec').ECPointFp
+var ECPointFp = ECCurveFp.ECPointFp
-var BigInteger = require('./jsbn')
 
 // ----------------
 // X9ECParameters

src/transaction.js

@@ -2,7 +2,7 @@
 
 var assert = require('assert')
 var Address = require('./address')
-var BigInteger = require('./jsbn/jsbn')
+var BigInteger = require('./bigi')
 var Script = require('./script')
 var convert = require('./convert')
 var crypto = require('./crypto')

test/ec.js

@@ -1,6 +1,6 @@
 var assert = require('assert')
 
-var sec = require('../src/jsbn/sec')
+var sec = require('../').sec
 var ecparams = sec('secp256k1')
 
 var BigInteger = require('..').BigInteger

test/ecdsa.js

@@ -1,7 +1,7 @@
 var assert = require('assert')
 var crypto = require('../').crypto
 var ecdsa = require('..').ecdsa
-var sec = require('../src/jsbn/sec.js')
+var sec = require('..').sec
 var ecparams = sec("secp256k1")
 
 var BigInteger = require('..').BigInteger

test/jsbn.js

@@ -1,36 +0,0 @@
-var assert = require('assert')
-var BigInteger = require('../src/jsbn/jsbn.js')
-var bytesToHex = require('../src/convert.js').bytesToHex
-var secureRandom = require('secure-random')
-
-describe('BigInteger', function() {
-  describe('toByteArraySigned', function() {
-    it('handles examples', function() {
-      function hex(num) {
-        var bytes = BigInteger.valueOf(num).toByteArraySigned()
-        var h = bytesToHex(bytes)
-        return '0x' + h
-      }
-
-      assert.equal(hex( 0), '0x')
-      assert.equal(hex( 1), '0x01')
-      assert.equal(hex(-1), '0x81')
-      assert.equal(hex( 127), '0x7f')
-      assert.equal(hex(-127), '0xff')
-      assert.equal(hex( 255), '0x00ff')
-      assert.equal(hex(-255), '0x80ff')
-      assert.equal(hex( 16300),  '0x3fac')
-      assert.equal(hex(-16300), '0xbfac')
-      assert.equal(hex( 62300), '0x00f35c')
-      assert.equal(hex(-62300), '0x80f35c')
-    })
-  })
-
-  describe('with RNG passed into constructor as the 2nd argument', function(){
-    it('returns a BigInteger with the limit of the specified length', function(){
-      var bitLength = 256
-      var i = new BigInteger(bitLength, secureRandom)
-      assert(i.bitLength() <= 256)
-    })
-  })
-})