| var aes = require('./aes') |
| var Buffer = require('safe-buffer').Buffer |
| var Transform = require('cipher-base') |
| var inherits = require('inherits') |
| |
| function StreamCipher (mode, key, iv, decrypt) { |
| Transform.call(this) |
| |
| this._cipher = new aes.AES(key) |
| this._prev = Buffer.from(iv) |
| this._cache = Buffer.allocUnsafe(0) |
| this._secCache = Buffer.allocUnsafe(0) |
| this._decrypt = decrypt |
| this._mode = mode |
| } |
| |
| inherits(StreamCipher, Transform) |
| |
| StreamCipher.prototype._update = function (chunk) { |
| return this._mode.encrypt(this, chunk, this._decrypt) |
| } |
| |
| StreamCipher.prototype._final = function () { |
| this._cipher.scrub() |
| } |
| |
| module.exports = StreamCipher |
