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