aaac7fed
 liuqimichale
add
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var CipherBase = require('cipher-base')
var des = require('des.js')
var inherits = require('inherits')
var Buffer = require('safe-buffer').Buffer
var modes = {
'des-ede3-cbc': des.CBC.instantiate(des.EDE),
'des-ede3': des.EDE,
'des-ede-cbc': des.CBC.instantiate(des.EDE),
'des-ede': des.EDE,
'des-cbc': des.CBC.instantiate(des.DES),
'des-ecb': des.DES
}
modes.des = modes['des-cbc']
modes.des3 = modes['des-ede3-cbc']
module.exports = DES
inherits(DES, CipherBase)
function DES (opts) {
CipherBase.call(this)
var modeName = opts.mode.toLowerCase()
var mode = modes[modeName]
var type
if (opts.decrypt) {
type = 'decrypt'
} else {
type = 'encrypt'
}
var key = opts.key
if (!Buffer.isBuffer(key)) {
key = Buffer.from(key)
}
if (modeName === 'des-ede' || modeName === 'des-ede-cbc') {
key = Buffer.concat([key, key.slice(0, 8)])
}
var iv = opts.iv
if (!Buffer.isBuffer(iv)) {
iv = Buffer.from(iv)
}
this._des = mode.create({
key: key,
iv: iv,
type: type
})
}
DES.prototype._update = function (data) {
return Buffer.from(this._des.update(data))
}
DES.prototype._final = function () {
return Buffer.from(this._des.final())
}
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