2015-01-03 17:04:14 +01:00
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<h1 class="page-title">Source: address.js</h1>
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<pre class="prettyprint source linenums"><code>/**
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2015-02-12 11:44:15 +01:00
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* Working with Bitmessage addresses.
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* **NOTE**: `Address` is exported as a module.
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* @example
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* var Address = require("bitmessage").Address;
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2015-02-14 11:54:39 +01:00
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* // Or: var Address = require("bitmessage/lib/address");
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2015-02-12 11:44:15 +01:00
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*
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* // Generate a new random Bitmessage identity.
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* var addr1 = Address.fromRandom();
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* console.log("New random Bitmessage address:", addr1.encode());
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*
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* // Or create it from passphrase.
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* var addr2 = Address.fromPassphrase("test");
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* console.log("Deterministic Bitmessage address:", addr2.encode());
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2015-01-03 17:04:14 +01:00
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* @see {@link https://bitmessage.org/wiki/Address}
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* @module bitmessage/address
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*/
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2015-02-12 11:44:15 +01:00
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// TODO(Kagami): Document getters/setters.
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2015-01-03 17:04:14 +01:00
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"use strict";
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2015-01-31 12:54:23 +01:00
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var objectAssign = Object.assign || require("object-assign");
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2015-01-03 17:04:14 +01:00
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var bufferEqual = require("buffer-equal");
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var bs58 = require("bs58");
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2015-01-31 12:54:23 +01:00
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var assert = require("./_util").assert;
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2015-01-03 17:04:14 +01:00
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var var_int = require("./structs").var_int;
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2015-01-31 12:54:23 +01:00
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var PubkeyBitfield = require("./structs").PubkeyBitfield;
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2015-01-03 17:04:14 +01:00
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var bmcrypto = require("./crypto");
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2015-01-31 12:54:23 +01:00
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var popkey = require("./_util").popkey;
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2015-01-03 17:04:14 +01:00
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/**
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* Create a new Bitmessage address object.
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2015-02-12 11:44:15 +01:00
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* @param {Object=} opts - Address options
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* @param {number} opts.version - Version number (4 by default)
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* @param {number} opts.stream - Stream number (1 by default)
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* @param {Object} opts.behavior - [Pubkey features]{@link
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* module:bitmessage/structs.PubkeyBitfield} (`DOES_ACK` by default)
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* @param {Buffer} opts.signPrivateKey - Signing private key
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* @param {Buffer} opts.signPublicKey - Signing public key
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* @param {Buffer} opts.encPrivateKey - Encryption private key
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* @param {Buffer} opts.encPublicKey - Encryption public key
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* @param {Buffer} opts.ripe - Keys RIPEMD hash
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2015-01-03 17:04:14 +01:00
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* @constructor
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* @static
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*/
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function Address(opts) {
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if (!(this instanceof Address)) {
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return new Address(opts);
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}
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2015-01-31 12:54:23 +01:00
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opts = objectAssign({}, opts);
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// Pull out version right away because it may be needed in setters.
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this.version = popkey(opts, "version") || 4;
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assert(this.version <= 4, "Version too high");
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assert(this.version >= 1, "Version too low");
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2015-01-31 12:54:23 +01:00
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// Set defaults.
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opts.stream = opts.stream || 1;
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opts.behavior = opts.behavior ||
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PubkeyBitfield().set(PubkeyBitfield.DOES_ACK);
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// Merge remained values.
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objectAssign(this, opts);
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2015-01-03 17:04:14 +01:00
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}
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2015-01-31 12:54:23 +01:00
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/**
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* Create a copy of the address object.
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* @return {Address} Cloned address.
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*/
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Address.prototype.clone = function() {
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return new Address(this);
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};
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/**
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2015-02-12 11:44:15 +01:00
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* Test if the given object is an Address instance.
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2015-01-31 12:54:23 +01:00
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* NOTE: Implementation is just simple `instanceof` but it improves
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* readability and consistent with `isArray`, `isBuffer`, etc.
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* @param {Object} obj - Given object
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* @return {boolean}
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*/
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Address.isAddress = function(obj) {
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return obj instanceof Address;
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};
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2015-01-03 17:04:14 +01:00
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/**
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* Parse Bitmessage address into address object.
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2015-01-31 12:54:23 +01:00
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* @param {string} str - Address string (with or without `BM-` prefix)
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2015-01-03 17:04:14 +01:00
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* @return {Address} Decoded address object.
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*/
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Address.decode = function(str) {
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2015-01-31 12:54:23 +01:00
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if (Address.isAddress(str)) {
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return str;
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}
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2015-01-03 17:04:14 +01:00
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str = str.trim();
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if (str.slice(0, 3) === "BM-") {
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str = str.slice(3);
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}
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var bytes = bs58.decode(str);
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var data = new Buffer(bytes.slice(0, -4));
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var checksum = new Buffer(bytes.slice(-4));
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2015-01-31 12:54:23 +01:00
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assert(bufferEqual(checksum, getaddrchecksum(data)), "Bad checkum");
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2015-01-03 17:04:14 +01:00
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var decoded = var_int.decode(data);
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var version = decoded.value;
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data = decoded.rest;
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decoded = var_int.decode(data);
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var stream = decoded.value;
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var ripe = decoded.rest;
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if (version === 4) {
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assert(ripe[0] !== 0, "Ripe encode error");
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}
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return new Address({version: version, stream: stream, ripe: ripe});
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};
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// Compute the Bitmessage checksum for the given data.
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2015-01-31 12:54:23 +01:00
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function getaddrchecksum(data) {
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2015-01-03 17:04:14 +01:00
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return bmcrypto.sha512(bmcrypto.sha512(data)).slice(0, 4);
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}
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2015-01-31 12:54:23 +01:00
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/**
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2015-02-12 11:44:15 +01:00
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* Get the RIPEMD hash of the address keys without prefix nulls.
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* @return {Buffer} A short RIPEMD hash.
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2015-01-31 12:54:23 +01:00
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*/
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Address.prototype.getShortRipe = function() {
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var ripe = this.ripe;
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return ripe.slice(20 - getripelen(ripe));
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};
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function getaddrhash(addr) {
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var dataToHash = Buffer.concat([
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var_int.encode(addr.version),
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var_int.encode(addr.stream),
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addr.ripe,
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]);
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return bmcrypto.sha512(dataToHash);
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2015-01-03 17:04:14 +01:00
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}
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/**
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2015-01-31 12:54:23 +01:00
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* Calculate the encryption key used to encrypt/decrypt
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* [pubkey]{@link module:bitmessage/objects.pubkey} objects.
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* @return {Buffer} A 32-byte private key.
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2015-01-03 17:04:14 +01:00
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*/
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2015-01-31 12:54:23 +01:00
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Address.prototype.getPubkeyPrivateKey = function() {
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return bmcrypto.sha512(getaddrhash(this)).slice(0, 32);
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};
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/**
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* Calculate the corresponding public key for encryption key used to
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* encrypt/decrypt
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* [pubkey]{@link module:bitmessage/objects.pubkey} objects.
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* @return {Buffer} A 65-byte public key.
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*/
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Address.prototype.getPubkeyPublicKey = function() {
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return bmcrypto.getPublic(this.getPubkeyPrivateKey());
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};
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/**
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* Calculate the encryption key used to encrypt/decrypt
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* [broadcast]{@link module:bitmessage/objects.broadcast} objects.
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* @return {Buffer} A 32-byte private key.
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*/
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Address.prototype.getBroadcastPrivateKey = function() {
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if (this.version >= 4) {
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return bmcrypto.sha512(getaddrhash(this)).slice(0, 32);
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2015-01-03 17:04:14 +01:00
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} else {
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2015-01-31 12:54:23 +01:00
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return getaddrhash(this).slice(0, 32);
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2015-01-03 17:04:14 +01:00
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}
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};
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2015-01-31 12:54:23 +01:00
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/**
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* Calculate the corresponding public key for encryption key used to
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* encrypt/decrypt
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* [broadcast]{@link module:bitmessage/objects.broadcast} objects.
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* @return {Buffer} A 65-byte public key.
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*/
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Address.prototype.getBroadcastPublicKey = function() {
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return bmcrypto.getPublic(this.getBroadcastPrivateKey());
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};
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/**
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* Calculate the address tag.
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* @return {Buffer} A 32-byte address tag.
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*/
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Address.prototype.getTag = function() {
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return bmcrypto.sha512(getaddrhash(this)).slice(32);
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};
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2015-01-03 17:04:14 +01:00
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// Get truncated ripe hash length.
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function getripelen(ripe) {
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var zeroes = 0;
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for (var i = 0; i < 20, ripe[i] === 0; i++) {
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zeroes++;
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}
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return 20 - zeroes;
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}
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// Do neccessary checkings of the truncated ripe hash length depending
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// on the address version.
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function assertripelen(ripelen, version, ripe) {
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if (ripe) {
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assert(ripe.length <= 20, "Bad ripe");
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}
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switch (version) {
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case 1:
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assert(ripelen === 20, "Bad ripe length");
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break;
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case 2:
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case 3:
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assert(ripelen >= 18, "Ripe is too short");
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assert(ripelen <= 20, "Ripe is too long");
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break;
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case 4:
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assert(ripelen >= 4, "Ripe is too short");
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assert(ripelen <= 20, "Ripe is too long");
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break;
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default:
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throw new Error("Bad version");
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}
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}
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// The same as `assertripelen` but return boolean instead of thrown an
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// Error.
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function checkripelen(ripelen, version) {
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try {
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assertripelen(ripelen, version);
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return true;
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} catch(e) {
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return false;
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}
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}
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/**
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* Encode Bitmessage address object into address string.
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* @return {string} Address string.
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*/
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Address.prototype.encode = function() {
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var data = Buffer.concat([
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var_int.encode(this.version),
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var_int.encode(this.stream),
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2015-01-31 12:54:23 +01:00
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this.getShortRipe(),
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2015-01-03 17:04:14 +01:00
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]);
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2015-01-31 12:54:23 +01:00
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var addr = Buffer.concat([data, getaddrchecksum(data)]);
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2015-01-03 17:04:14 +01:00
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return "BM-" + bs58.encode(addr);
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};
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/**
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2015-02-12 11:44:15 +01:00
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* Create a new Bitmessage address with random encryption and signing
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2015-01-03 17:04:14 +01:00
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* private keys.
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2015-02-12 11:44:15 +01:00
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* @param {Object=} opts - Address options
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* @param {number} opts.ripeLength - Required length of the short RIPEMD
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* hash (19 by default)
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* @param {number} opts.version - Version number (4 by default)
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* @param {number} opts.stream - Stream number (1 by default)
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* @param {Object} opts.behavior - [Pubkey features]{@link module:bitmessage/structs.PubkeyBitfield} (`DOES_ACK` by default)
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* @return {Address} New address object.
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2015-01-03 17:04:14 +01:00
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*/
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Address.fromRandom = function(opts) {
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2015-01-31 12:54:23 +01:00
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opts = objectAssign({}, opts);
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2015-01-03 17:04:14 +01:00
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var version = opts.version = opts.version || 4;
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2015-01-31 12:54:23 +01:00
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var ripelen = popkey(opts, "ripeLength") || 19;
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2015-01-03 17:04:14 +01:00
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assertripelen(ripelen, version);
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// TODO(Kagami): Speed it up using web workers in Browser.
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// TODO(Kagami): Bind to C++ version of this code in Node.
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2015-01-31 12:54:23 +01:00
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var encPrivateKey, encPublicKey, ripe, len;
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2015-01-03 17:04:14 +01:00
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var signPrivateKey = bmcrypto.getPrivate();
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var signPublicKey = bmcrypto.getPublic(signPrivateKey);
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var keysbuf = new Buffer(130);
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signPublicKey.copy(keysbuf);
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while (true) {
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encPrivateKey = bmcrypto.getPrivate();
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encPublicKey = bmcrypto.getPublic(encPrivateKey);
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encPublicKey.copy(keysbuf, 65);
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ripe = bmcrypto.ripemd160(bmcrypto.sha512(keysbuf));
|
2015-01-31 12:54:23 +01:00
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len = getripelen(ripe);
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if (len <= ripelen && checkripelen(len, version)) {
|
2015-01-03 17:04:14 +01:00
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opts.signPrivateKey = signPrivateKey;
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opts.encPrivateKey = encPrivateKey;
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return new Address(opts);
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}
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}
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};
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2015-01-31 12:54:23 +01:00
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/**
|
2015-02-12 11:44:15 +01:00
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* Create a new Bitmessage address from passphrase.
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* @param {(string|Object)} opts - Passphrase or address options
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* @param {string} opts.passphrase - Passphrase to generate address from
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* @param {number=} opts.ripeLength - Required length of the short
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* RIPEMD hash (19 by default)
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* @param {number=} opts.version - Version number (4 by default)
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* @param {number=} opts.stream - Stream number (1 by default)
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* @param {Object=} opts.behavior - [Pubkey features]{@link module:bitmessage/structs.PubkeyBitfield} (`DOES_ACK` by default)
|
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* @return {Address} New address object.
|
2015-01-31 12:54:23 +01:00
|
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*/
|
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Address.fromPassphrase = function(opts) {
|
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|
|
|
if (typeof opts === "string") {
|
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|
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opts = {passphrase: opts};
|
|
|
|
|
} else {
|
|
|
|
|
opts = objectAssign({}, opts);
|
|
|
|
|
}
|
|
|
|
|
var version = opts.version = opts.version || 4;
|
|
|
|
|
var ripelen = popkey(opts, "ripeLength") || 19;
|
|
|
|
|
assertripelen(ripelen, version);
|
|
|
|
|
var passphrase = popkey(opts, "passphrase");
|
|
|
|
|
|
|
|
|
|
// TODO(Kagami): Speed it up using web workers in Browser.
|
|
|
|
|
// TODO(Kagami): Bind to C++ version of this code in Node.
|
|
|
|
|
var signPrivateKey, signPublicKey, encPrivateKey, encPublicKey;
|
|
|
|
|
var ripe, len, tmp;
|
|
|
|
|
var signnonce = 0;
|
|
|
|
|
var encnonce = 1;
|
|
|
|
|
var keysbuf = new Buffer(130);
|
|
|
|
|
// XXX(Kagami): Spec doesn't mention encoding, using UTF-8.
|
|
|
|
|
var phrasebuf = new Buffer(passphrase, "utf8");
|
|
|
|
|
while (true) {
|
|
|
|
|
// TODO(Kagami): We may slightly optimize it and pre-create tmp
|
|
|
|
|
// buffers based on the encoded nonce size (1, 3, 5 and 9 bytes).
|
|
|
|
|
tmp = Buffer.concat([phrasebuf, var_int.encode(signnonce)]);
|
|
|
|
|
signPrivateKey = bmcrypto.sha512(tmp).slice(0, 32);
|
|
|
|
|
signPublicKey = bmcrypto.getPublic(signPrivateKey);
|
|
|
|
|
signPublicKey.copy(keysbuf);
|
|
|
|
|
|
|
|
|
|
tmp = Buffer.concat([phrasebuf, var_int.encode(encnonce)]);
|
|
|
|
|
encPrivateKey = bmcrypto.sha512(tmp).slice(0, 32);
|
|
|
|
|
encPublicKey = bmcrypto.getPublic(encPrivateKey);
|
|
|
|
|
encPublicKey.copy(keysbuf, 65);
|
|
|
|
|
|
|
|
|
|
ripe = bmcrypto.ripemd160(bmcrypto.sha512(keysbuf));
|
|
|
|
|
len = getripelen(ripe);
|
|
|
|
|
if (len <= ripelen && checkripelen(len, version)) {
|
|
|
|
|
opts.signPrivateKey = signPrivateKey;
|
|
|
|
|
opts.encPrivateKey = encPrivateKey;
|
|
|
|
|
return new Address(opts);
|
|
|
|
|
}
|
|
|
|
|
signnonce += 2;
|
|
|
|
|
encnonce += 2;
|
|
|
|
|
}
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
Object.defineProperty(Address.prototype, "signPrivateKey", {
|
|
|
|
|
get: function() {
|
|
|
|
|
return this._signPrivateKey;
|
|
|
|
|
},
|
|
|
|
|
set: function(signPrivateKey) {
|
|
|
|
|
this._signPrivateKey = signPrivateKey;
|
|
|
|
|
// Invalidate cached values;
|
|
|
|
|
delete this._signPublicKey;
|
|
|
|
|
delete this._ripe;
|
|
|
|
|
},
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
Object.defineProperty(Address.prototype, "signPublicKey", {
|
|
|
|
|
get: function() {
|
|
|
|
|
if (this._signPublicKey) {
|
|
|
|
|
return this._signPublicKey;
|
|
|
|
|
} else if (this.signPrivateKey) {
|
|
|
|
|
this._signPublicKey = bmcrypto.getPublic(this.signPrivateKey);
|
|
|
|
|
return this._signPublicKey;
|
|
|
|
|
} else {
|
|
|
|
|
throw new Error("No signing key");
|
|
|
|
|
}
|
|
|
|
|
},
|
|
|
|
|
set: function(signPublicKey) {
|
|
|
|
|
this._signPublicKey = signPublicKey;
|
|
|
|
|
},
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
Object.defineProperty(Address.prototype, "encPrivateKey", {
|
|
|
|
|
get: function() {
|
|
|
|
|
return this._encPrivateKey;
|
|
|
|
|
},
|
|
|
|
|
set: function(encPrivateKey) {
|
|
|
|
|
this._encPrivateKey = encPrivateKey;
|
|
|
|
|
// Invalidate cached values;
|
|
|
|
|
delete this._encPublicKey;
|
|
|
|
|
delete this._ripe;
|
|
|
|
|
},
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
Object.defineProperty(Address.prototype, "encPublicKey", {
|
|
|
|
|
get: function() {
|
|
|
|
|
if (this._encPublicKey) {
|
|
|
|
|
return this._encPublicKey;
|
|
|
|
|
} else if (this.encPrivateKey) {
|
|
|
|
|
this._encPublicKey = bmcrypto.getPublic(this.encPrivateKey);
|
|
|
|
|
return this._encPublicKey;
|
|
|
|
|
} else {
|
|
|
|
|
throw new Error("No encryption key");
|
|
|
|
|
}
|
|
|
|
|
},
|
|
|
|
|
set: function(encPublicKey) {
|
|
|
|
|
this._encPublicKey = encPublicKey;
|
|
|
|
|
},
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
Object.defineProperty(Address.prototype, "ripe", {
|
|
|
|
|
get: function() {
|
|
|
|
|
if (this._ripe) {
|
|
|
|
|
return this._ripe;
|
|
|
|
|
}
|
|
|
|
|
var dataToHash = Buffer.concat([this.signPublicKey, this.encPublicKey]);
|
|
|
|
|
this._ripe = bmcrypto.ripemd160(bmcrypto.sha512(dataToHash));
|
|
|
|
|
return this._ripe;
|
|
|
|
|
},
|
|
|
|
|
set: function(ripe) {
|
|
|
|
|
assertripelen(getripelen(ripe), this.version, ripe);
|
|
|
|
|
if (ripe.length < 20) {
|
|
|
|
|
var fullripe = new Buffer(20);
|
|
|
|
|
fullripe.fill(0);
|
|
|
|
|
ripe.copy(fullripe, 20 - ripe.length);
|
|
|
|
|
ripe = fullripe;
|
|
|
|
|
}
|
|
|
|
|
this._ripe = ripe;
|
|
|
|
|
},
|
|
|
|
|
});
|
|
|
|
|
|
2015-01-03 17:04:14 +01:00
|
|
|
module.exports = Address;
|
|
|
|
|
</code></pre>
|
|
|
|
|
</article>
|
|
|
|
|
</section>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
</div>
|
|
|
|
|
|
|
|
|
|
<nav>
|
2015-02-14 12:00:58 +01:00
|
|
|
<h2><a href="index.html">Home</a></h2><h3>Modules</h3><ul><li><a href="module-bitmessage.html">bitmessage</a></li><li><a href="module-bitmessage_address.html">bitmessage/address</a></li><li><a href="module-bitmessage_crypto.html">bitmessage/crypto</a></li><li><a href="module-bitmessage_messages.html">bitmessage/messages</a></li><li><a href="module-bitmessage_net_base.html">bitmessage/net/base</a></li><li><a href="module-bitmessage_net_tcp.html">bitmessage/net/tcp</a></li><li><a href="module-bitmessage_net_ws.html">bitmessage/net/ws</a></li><li><a href="module-bitmessage_objects.html">bitmessage/objects</a></li><li><a href="module-bitmessage_pow.html">bitmessage/pow</a></li><li><a href="module-bitmessage_structs.html">bitmessage/structs</a></li><li><a href="module-bitmessage_user-agent.html">bitmessage/user-agent</a></li><li><a href="module-bitmessage_wif.html">bitmessage/wif</a></li></ul><h3>Classes</h3><ul><li><a href="module-bitmessage_address.Address.html">Address</a></li><li><a href="module-bitmessage_net_base.BaseTransport.html">BaseTransport</a></li><li><a href="module-bitmessage_net_tcp.TcpTransport.html">TcpTransport</a></li><li><a href="module-bitmessage_net_ws.WsTransport.html">WsTransport</a></li><li><a href="module-bitmessage_structs.PubkeyBitfield.html">PubkeyBitfield</a></li><li><a href="module-bitmessage_structs.ServicesBitfield.html">ServicesBitfield</a></li></ul><h3>Namespaces</h3><ul><li><a href="module-bitmessage_messages.addr.html">addr</a></li><li><a href="module-bitmessage_messages.error.html">error</a></li><li><a href="module-bitmessage_messages.getdata.html">getdata</a></li><li><a href="module-bitmessage_messages.inv.html">inv</a></li><li><a href="module-bitmessage_messages.version.html">version</a></li><li><a href="module-bitmessage_objects.broadcast.html">broadcast</a></li><li><a href="module-bitmessage_objects.getpubkey.html">getpubkey</a></li><li><a href="module-bitmessage_objects.msg.html">msg</a></li><li><a href="module-bitmessage_objects.pubkey.html">pubkey</a></li><li><a href="module-bitmessage_structs.encrypted.html">encrypted</a></li><li><a href="module-bitmessage_structs.inv_vect.html">inv_vect</a></li><li><a href="module-bitmessage_structs.message.html">message</a></li><li><a href="module-bitmessage_structs.net_addr.html">net_addr</a></li><li><a href="module-bitmessage_structs.object.html">object</a></li><li><a href="module-bitmessage_structs.var_int.html">var_int</a></li><li><a href="module-bitmessage_structs.var_int_list.html">var_int_list</a></li><li><a href="module-bitmessage_structs.var_str.html">var_str</a></li></ul>
|
2015-01-03 17:04:14 +01:00
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2015-02-14 12:06:56 +01:00
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.4.0-dev</a> on Sat Feb 14 2015 14:05:38 GMT+0300 (MSK)
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2015-01-03 17:04:14 +01:00
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