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- 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
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