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 liuqimichale
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var DES = require('browserify-des')
var aes = require('browserify-aes/browser')
var aesModes = require('browserify-aes/modes')
var desModes = require('browserify-des/modes')
var ebtk = require('evp_bytestokey')
function createCipher (suite, password) {
suite = suite.toLowerCase()
var keyLen, ivLen
if (aesModes[suite]) {
keyLen = aesModes[suite].key
ivLen = aesModes[suite].iv
} else if (desModes[suite]) {
keyLen = desModes[suite].key * 8
ivLen = desModes[suite].iv
} else {
throw new TypeError('invalid suite type')
}
var keys = ebtk(password, false, keyLen, ivLen)
return createCipheriv(suite, keys.key, keys.iv)
}
function createDecipher (suite, password) {
suite = suite.toLowerCase()
var keyLen, ivLen
if (aesModes[suite]) {
keyLen = aesModes[suite].key
ivLen = aesModes[suite].iv
} else if (desModes[suite]) {
keyLen = desModes[suite].key * 8
ivLen = desModes[suite].iv
} else {
throw new TypeError('invalid suite type')
}
var keys = ebtk(password, false, keyLen, ivLen)
return createDecipheriv(suite, keys.key, keys.iv)
}
function createCipheriv (suite, key, iv) {
suite = suite.toLowerCase()
if (aesModes[suite]) return aes.createCipheriv(suite, key, iv)
if (desModes[suite]) return new DES({ key: key, iv: iv, mode: suite })
throw new TypeError('invalid suite type')
}
function createDecipheriv (suite, key, iv) {
suite = suite.toLowerCase()
if (aesModes[suite]) return aes.createDecipheriv(suite, key, iv)
if (desModes[suite]) return new DES({ key: key, iv: iv, mode: suite, decrypt: true })
throw new TypeError('invalid suite type')
}
function getCiphers () {
return Object.keys(desModes).concat(aes.getCiphers())
}
exports.createCipher = exports.Cipher = createCipher
exports.createCipheriv = exports.Cipheriv = createCipheriv
exports.createDecipher = exports.Decipher = createDecipher
exports.createDecipheriv = exports.Decipheriv = createDecipheriv
exports.listCiphers = exports.getCiphers = getCiphers
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