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