Edit File: cfb1.js
var Buffer = require('safe-buffer').Buffer function encryptByte (self, byteParam, decrypt) { var pad var i = -1 var len = 8 var out = 0 var bit, value while (++i < len) { pad = self._cipher.encryptBlock(self._prev) bit = (byteParam & (1 << (7 - i))) ? 0x80 : 0 value = pad[0] ^ bit out += ((value & 0x80) >> (i % 8)) self._prev = shiftIn(self._prev, decrypt ? bit : value) } return out } function shiftIn (buffer, value) { var len = buffer.length var i = -1 var out = Buffer.allocUnsafe(buffer.length) buffer = Buffer.concat([buffer, Buffer.from([value])]) while (++i < len) { out[i] = buffer[i] << 1 | buffer[i + 1] >> (7) } return out } exports.encrypt = function (self, chunk, decrypt) { var len = chunk.length var out = Buffer.allocUnsafe(len) var i = -1 while (++i < len) { out[i] = encryptByte(self, chunk[i], decrypt) } return out }
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