32 lines
791 B
JavaScript
32 lines
791 B
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 bufferToWordArray(buffer) {
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assert(Buffer.isBuffer(buffer), 'Expected Buffer, got', buffer)
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var words = []
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for (var i = 0, b = 0; i < buffer.length; i++, b += 8) {
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words[b >>> 5] |= buffer[i] << (24 - b % 32)
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}
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return new WordArray.init(words, buffer.length)
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}
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function wordArrayToBuffer(wordArray) {
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assert(Array.isArray(wordArray.words), 'Expected WordArray, got' + wordArray)
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var words = wordArray.words
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var buffer = new Buffer(words.length * 4)
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words.forEach(function(value, i) {
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buffer.writeInt32BE(value & -1, i * 4)
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})
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return buffer
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}
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module.exports = {
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bufferToWordArray: bufferToWordArray,
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wordArrayToBuffer: wordArrayToBuffer
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}
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