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50 lines
1.2 KiB
50 lines
1.2 KiB
var CipherBase = require('cipher-base') |
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var des = require('des.js') |
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var inherits = require('inherits') |
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var Buffer = require('safe-buffer').Buffer |
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var modes = { |
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'des-ede3-cbc': des.CBC.instantiate(des.EDE), |
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'des-ede3': des.EDE, |
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'des-ede-cbc': des.CBC.instantiate(des.EDE), |
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'des-ede': des.EDE, |
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'des-cbc': des.CBC.instantiate(des.DES), |
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'des-ecb': des.DES |
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} |
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modes.des = modes['des-cbc'] |
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modes.des3 = modes['des-ede3-cbc'] |
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module.exports = DES |
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inherits(DES, CipherBase) |
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function DES (opts) { |
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CipherBase.call(this) |
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var modeName = opts.mode.toLowerCase() |
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var mode = modes[modeName] |
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var type |
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if (opts.decrypt) { |
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type = 'decrypt' |
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} else { |
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type = 'encrypt' |
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} |
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var key = opts.key |
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if (!Buffer.isBuffer(key)) { |
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key = Buffer.from(key) |
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} |
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if (modeName === 'des-ede' || modeName === 'des-ede-cbc') { |
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key = Buffer.concat([key, key.slice(0, 8)]) |
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} |
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var iv = opts.iv |
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if (!Buffer.isBuffer(iv)) { |
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iv = Buffer.from(iv) |
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} |
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this._des = mode.create({ |
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key: key, |
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iv: iv, |
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type: type |
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}) |
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} |
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DES.prototype._update = function (data) { |
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return Buffer.from(this._des.update(data)) |
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} |
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DES.prototype._final = function () { |
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return Buffer.from(this._des.final()) |
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}
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