Daniel Cousens
10 years ago
2 changed files with 0 additions and 140 deletions
@ -1,84 +0,0 @@ |
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var assert = require('assert') |
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var base58check = require('bs58check') |
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var ecdsa = require('./ecdsa') |
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var networks = require('./networks') |
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var randomBytes = require('randombytes') |
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var typeForce = require('typeforce') |
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var BigInteger = require('bigi') |
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var ECPubKey = require('./ecpubkey') |
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var ecurve = require('ecurve') |
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var secp256k1 = ecurve.getCurveByName('secp256k1') |
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function ECKey (d, compressed) { |
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assert(d.signum() > 0, 'Private key must be greater than 0') |
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assert(d.compareTo(ECKey.curve.n) < 0, 'Private key must be less than the curve order') |
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var Q = ECKey.curve.G.multiply(d) |
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this.d = d |
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this.pub = new ECPubKey(Q, compressed) |
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} |
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// Constants
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ECKey.curve = secp256k1 |
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// Static constructors
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ECKey.fromWIF = function (string) { |
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var payload = base58check.decode(string) |
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var compressed = false |
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// Ignore the version byte
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payload = payload.slice(1) |
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if (payload.length === 33) { |
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assert.strictEqual(payload[32], 0x01, 'Invalid compression flag') |
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// Truncate the compression flag
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payload = payload.slice(0, -1) |
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compressed = true |
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} |
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assert.equal(payload.length, 32, 'Invalid WIF payload length') |
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var d = BigInteger.fromBuffer(payload) |
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return new ECKey(d, compressed) |
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} |
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ECKey.makeRandom = function (compressed, rng) { |
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rng = rng || randomBytes |
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var buffer = rng(32) |
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typeForce('Buffer', buffer) |
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assert.equal(buffer.length, 32, 'Expected 256-bit Buffer from RNG') |
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var d = BigInteger.fromBuffer(buffer) |
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d = d.mod(ECKey.curve.n) |
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return new ECKey(d, compressed) |
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} |
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// Export functions
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ECKey.prototype.toWIF = function (network) { |
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network = network || networks.bitcoin |
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var bufferLen = this.pub.compressed ? 34 : 33 |
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var buffer = new Buffer(bufferLen) |
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buffer.writeUInt8(network.wif, 0) |
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this.d.toBuffer(32).copy(buffer, 1) |
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if (this.pub.compressed) { |
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buffer.writeUInt8(0x01, 33) |
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} |
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return base58check.encode(buffer) |
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} |
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// Operations
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ECKey.prototype.sign = function (hash) { |
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return ecdsa.sign(ECKey.curve, hash, this.d) |
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} |
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module.exports = ECKey |
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@ -1,56 +0,0 @@ |
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var crypto = require('./crypto') |
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var ecdsa = require('./ecdsa') |
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var typeForce = require('typeforce') |
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var networks = require('./networks') |
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var Address = require('./address') |
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var ecurve = require('ecurve') |
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var secp256k1 = ecurve.getCurveByName('secp256k1') |
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function ECPubKey (Q, compressed) { |
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if (compressed === undefined) { |
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compressed = true |
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} |
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typeForce('Point', Q) |
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typeForce('Boolean', compressed) |
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this.compressed = compressed |
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this.Q = Q |
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} |
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// Constants
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ECPubKey.curve = secp256k1 |
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// Static constructors
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ECPubKey.fromBuffer = function (buffer) { |
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var Q = ecurve.Point.decodeFrom(ECPubKey.curve, buffer) |
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return new ECPubKey(Q, Q.compressed) |
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} |
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ECPubKey.fromHex = function (hex) { |
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return ECPubKey.fromBuffer(new Buffer(hex, 'hex')) |
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} |
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// Operations
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ECPubKey.prototype.getAddress = function (network) { |
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network = network || networks.bitcoin |
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return new Address(crypto.hash160(this.toBuffer()), network.pubKeyHash) |
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} |
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ECPubKey.prototype.verify = function (hash, signature) { |
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return ecdsa.verify(ECPubKey.curve, hash, signature, this.Q) |
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} |
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// Export functions
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ECPubKey.prototype.toBuffer = function () { |
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return this.Q.getEncoded(this.compressed) |
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} |
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ECPubKey.prototype.toHex = function () { |
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return this.toBuffer().toString('hex') |
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} |
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module.exports = ECPubKey |
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