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| var Buffer = require('safe-buffer').Buffer
|
| function encryptByte (self, byteParam, decrypt) {
| var pad = self._cipher.encryptBlock(self._prev)
| var out = pad[0] ^ byteParam
|
| self._prev = Buffer.concat([
| self._prev.slice(1),
| Buffer.from([decrypt ? byteParam : out])
| ])
|
| 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
| }
|
|
