Andreas Brekken
11 years ago
1 changed files with 58 additions and 61 deletions
@ -1,72 +1,69 @@ |
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var BigInteger = require('./jsbn/jsbn'); |
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var Crypto = require('./crypto-js/crypto'); |
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module.exports = { |
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/** |
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* Cross-browser compatibility version of Array.isArray. |
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*/ |
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isArray: Array.isArray || function(o) |
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{ |
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/** |
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* Cross-browser compatibility version of Array.isArray. |
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*/ |
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exports.isArray = Array.isArray || function(o) { |
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return Object.prototype.toString.call(o) === '[object Array]'; |
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}, |
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} |
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/** |
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* Create a byte array representing a number with the given length |
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*/ |
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numToBytes: function(num,bytes) { |
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/** |
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* Create a byte array representing a number with the given length |
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*/ |
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exports.numToBytes = function(num, bytes) { |
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if (bytes === undefined) bytes = 8; |
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if (bytes == 0) return []; |
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else return [num % 256].concat(module.exports.numToBytes(Math.floor(num / 256),bytes-1)); |
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}, |
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if (bytes === 0) return []; |
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return [num % 256].concat(module.exports.numToBytes(Math.floor(num / 256), bytes - 1)); |
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} |
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/** |
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* Convert a byte array to the number that it represents |
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*/ |
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bytesToNum: function(bytes) { |
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if (bytes.length == 0) return 0; |
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else return bytes[0] + 256 * module.exports.bytesToNum(bytes.slice(1)); |
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}, |
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/** |
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* Turn an integer into a "var_int". |
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* |
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* "var_int" is a variable length integer used by Bitcoin's binary format. |
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* |
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* Returns a byte array. |
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*/ |
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numToVarInt: function(num) { |
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var m = module.exports; |
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/** |
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* Convert a byte array to the number that it represents |
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*/ |
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exports.bytesToNum = function(bytes) { |
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if (bytes.length === 0) return 0; |
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return bytes[0] + 256 * module.exports.bytesToNum(bytes.slice(1)); |
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} |
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/** |
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* Turn an integer into a "var_int". |
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* |
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* "var_int" is a variable length integer used by Bitcoin's binary format. |
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* |
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* Returns a byte array. |
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*/ |
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exports.numToVarInt = function(num) { |
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if (num < 253) return [num]; |
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else if (num < 65536) return [253].concat(m.numToBytes(num,2)); |
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else if (num < 4294967296) return [254].concat(m.numToBytes(num,4)); |
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else return [253].concat(m.numToBytes(num,8)); |
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}, |
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if (num < 65536) return [253].concat(exports.numToBytes(num, 2)); |
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if (num < 4294967296) return [254].concat(exports.numToBytes(num, 4)); |
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return [253].concat(exports.numToBytes(num, 8)); |
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} |
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exports.bytesToWords = function (bytes) { |
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var words = []; |
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for (var i = 0, b = 0; i < bytes.length; i++, b += 8) { |
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words[b >>> 5] |= bytes[i] << (24 - b % 32); |
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} |
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return words; |
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} |
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bytesToWords: function (bytes) { |
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var words = []; |
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for (var i = 0, b = 0; i < bytes.length; i++, b += 8) { |
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words[b >>> 5] |= bytes[i] << (24 - b % 32); |
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} |
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return words; |
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}, |
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wordsToBytes: function (words) { |
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var bytes = []; |
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for (var b = 0; b < words.length * 32; b += 8) { |
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bytes.push((words[b >>> 5] >>> (24 - b % 32)) & 0xFF); |
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} |
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return bytes; |
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}, |
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exports.wordsToBytes = function (words) { |
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var bytes = []; |
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for (var b = 0; b < words.length * 32; b += 8) { |
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bytes.push((words[b >>> 5] >>> (24 - b % 32)) & 0xFF); |
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} |
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return bytes; |
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}, |
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/** |
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* Calculate RIPEMD160(SHA256(data)). |
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* |
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* Takes an arbitrary byte array as inputs and returns the hash as a byte |
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* array. |
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*/ |
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sha256ripe160: function (data) { |
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/** |
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* Calculate RIPEMD160(SHA256(data)). |
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* |
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* Takes an arbitrary byte array as inputs and returns the hash as a byte |
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* array. |
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*/ |
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exports.sha256ripe160 = function (data) { |
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return Crypto.RIPEMD160(Crypto.SHA256(data, {asBytes: true}), {asBytes: true}); |
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}, |
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error: function(msg) { |
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} |
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exports.error = function(msg) { |
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throw new Error(msg); |
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} |
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}; |
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} |
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