43 lines
1 KiB
JavaScript
43 lines
1 KiB
JavaScript
var assert = require('assert')
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var Crypto = require('crypto-js')
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var WordArray = Crypto.lib.WordArray
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function bytesToWords(bytes) {
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assert(Array.isArray(bytes) || Buffer.isBuffer(bytes), 'Input must be a byte array')
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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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function wordsToBytes(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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function bytesToWordArray(bytes) {
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return new WordArray.init(bytesToWords(bytes), bytes.length)
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}
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function wordArrayToBytes(wordArray) {
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return wordsToBytes(wordArray.words)
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}
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function reverseEndian(hex) {
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var buffer = new Buffer(hex, 'hex')
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Array.prototype.reverse.call(buffer)
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return buffer.toString('hex')
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}
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module.exports = {
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bytesToWords: bytesToWords,
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wordsToBytes: wordsToBytes,
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bytesToWordArray: bytesToWordArray,
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wordArrayToBytes: wordArrayToBytes,
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reverseEndian: reverseEndian
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}
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