ecurve

JavaScript component for Elliptic Curve Cryptography. Works in both Node.js and the browser.

Official documentation:

http://cryptocoinjs.com/modules/crypto/ecurve/

1.0.0 / 2014-06-25

• removed curve secp224r1 because we're using curve specific optimizations for other curves see #21

0.10.0 / 2014-06-25

• moved curves to json Daniel Cousens
• added jshint Daniel Cousens
• added NIST test vectors Daniel Cousens
• added pointFromX() on Curve instance Daniel Cousens

0.9.0 / 2014-06-12

• broke compatibility, simplified fields on Curve class. Daniel Cousens

0.8.0 / 2014-06-10

• broke compatiblity, removed Point class from Curve. Daniel Cousens

no longer works:

var Curve = require('ecurve').Curve
var Point = Curve.Point

better way:

var Curve = requre('ecurve').Curve
var Point = require('ecurve').Point

0.7.0 / 2014-06-10

• major clean up by Daniel Cousens
• removed semicolons as per http://cryptocoinjs.com/about/contributing/
• removed terst and replaced with Node.js assert as per http://cryptocoinjs.com/about/contributing/
• more clean up by Daniel Cousens
• ECCurveFp field q renamed to p / Daniel Cousens
• ecparams field g renamed to G / Daniel Cousens
• ECFieldElementFp shown unnecessary (deleted) / Daniel Cousens
• Chopped of all namespacing for function/class names. / Daniel Cousens
• Fixed validation and added method isOnCurve() / Daniel Cousens
• added methods fromAffine(), added properties affineX and affineY to Point. This is because Point internally stores coordinates as Jacobian. Daniel Cousens
• Renamed getECParams() to getCurveByName() Daniel Cousens

0.6.0 / 2014-05-31

• broke compability to make module exporting more logical, so had to bump minor version.

0.5.0 / 2014-05-31

• added http://ci.testling.com support
• changed ECPointFP.decodeFrom() to accept Buffer instead of Array. Thanks BitcoinJS devs / Daniel Cousens :)
• changed ECPointFP.prototype.getEncoded() to return a Buffer instead of an Array
• added compressed property to instances of ECPointFp, set to true by default
• ECCurveFp.prototype.decodePointHex removed. This change brings additonal clarity and removes untested (unused) portions of decodePointHex.

Old way:

var G = curve.decodePointHex("04"
      + "79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798"
      + "483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8");

New way:

var x = BigInteger.fromHex("79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798")
var y = BigInteger.fromHex("483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8")
var G = new ECPointFp(curve, curve.fromBigInteger(x), curve.fromBigInteger(y));

• deleted file util.js which contained integerToBytes(bigInt, sizeInBytes), new way: [].slice.call(bigInt.toBuffer(sizeInBytes))
• removed unused methods: ECPointFp.prototype.add2D, ECPointFp.prototype.twice2D, and ECPointFp.prototype.multiply2D
• renamed getCurve() to getECParams() to alleviate confusion:

New way:

var ecurve = require('ecurve')
var ecparams = ecurve.getECParams('secp256k1')

• renamed result ecparams [names.js] object methods getN(), getH(), getG(), and getCurve() to properties n, h, g, curve. This isn't Java. JavaScript has excellent property support through Object.defineProperty.
• renamed ECCurveFp methods getQ(), getA(), and getB() to properties. See justfication in previous change.

0.4.0 / 2014-05-29

• moved module ecurve-names into this module
• moved docs to cryptocoinjs.com
• moved ECFieldElementFp to field-element.js
• moved ECPointFp to point.js
• moved ECCurveFp to curve.js
• upgraded `bigi@0.2.xtobigi@^1.1.0`
• added travis-ci and coveralls support

0.3.2 / 2014-04-14

• bugfix: decodeFrom works with compressed keys, #8

0.3.1 / 2014-03-13

• bug fix: ECPointFp.decodeFrom was incorrectly moved to ECPointFp.prototype

0.3.0 / 2014-03-05

• Fixed point export format to adhere to SEC guidelines (Bug #2)
• Removed AMD/Component support
• added browser test

0.2.0 / 2013-12-08

• changed dep to bigi

0.1.0 / 2013-11-20

• changed package name
• removed AMD support

0.0.1 / 2013-11-06

• initial release