diff --git a/index.js b/index.js index dc3e5c6..4528fb8 100644 --- a/index.js +++ b/index.js @@ -1,27 +1,49 @@ 'use strict' +const os = require('os'); +const path = require('path') + +const { encode, decode, legacyDecode } = require('./lib/crypto') +const padText = require('./lib/toThirtytwo'); +const fs = require('graceful-fs') +const writeFileAtomic = require('write-file-atomic') +const mkdirp = require('mkdirp') +const yaml = require('js-yaml') + +const defaultOptions = { + key: null, + file: null, + encrypt: true, + format: 'json', +} -function Preferences (id, defs, options) { - options = options || { - key: null, - file: null, - encrypt: true, - format: 'json' - } - var self = this - var identifier = id.replace(/[\/\?<>\\:\*\|" :]/g, '.').replace(/\.+/g, '.') - var path = require('path') - var homedir = require('os-homedir')() - var dirpath = options.file ? path.dirname(options.file) : path.join(homedir, '.config', 'preferences') - var filepath = options.file ? path.join(dirpath, path.basename(options.file)) : path.join(dirpath, identifier + '.pref') - var encrypt = options.encrypt; - var format = options.format; - var fs = require('graceful-fs') - var writeFileAtomic = require('write-file-atomic') - var mkdirp = require('mkdirp') - var crypto = require('crypto') - var yaml = require('js-yaml') - var password = (function () { - var key = options.key || path.join(homedir, '.ssh', 'id_rsa') +function Preferences (id, defs, options = defaultOptions) { + const homedir = os.homedir() + // eslint-disable-next-line no-useless-escape + const identifier = id.replace(/[\/\?<>\\:\*\|" :]/g, '.').replace(/\.+/g, '.') + const dirpath = options.file ? path.dirname(options.file) : path.join(homedir, '.config', 'preferences') + const filepath = options.file ? path.join(dirpath, path.basename(options.file)) : path.join(dirpath, identifier + '.pref') + const { encrypt, format } = options + + let savePristine = false + let savedData = null + let convertFromLegacy = false + + const key = (function () { + let key; + if (options.key) key = padText(options.key, identifier) + else key = path.join(homedir, '.ssh', 'id_rsa') + try { + // Use private SSH key or... + return fs.readFileSync(key).toString('utf8').slice(0, 32) + } catch (e) { + // ...fallback to an id dependant password + return padText('PREFS', identifier) + } + })() + + // retaining old code in order to be able to decode exisiting preferences + const legacyPassword = (function () { + const key = options.key || path.join(homedir, '.ssh', 'id_rsa') try { // Use private SSH key or... return fs.readFileSync(key).toString('utf8') @@ -30,82 +52,89 @@ function Preferences (id, defs, options) { return 'PREFS-' + identifier } })() - var savePristine = false - var savedData = null - - function encode (text) { - if (!encrypt) return text; - var cipher = crypto.createCipher('aes128', password) - return cipher.update(new Buffer(text).toString('utf8'), 'utf8', 'hex') + cipher.final('hex') - } - function decode (text) { - if (!encrypt) return text; - var decipher = crypto.createDecipher('aes128', password) - return decipher.update(String(text), 'hex', 'utf8') + decipher.final('utf8') - } - - function serialize (data) { - if (format == 'yaml') return yaml.safeDump(data) - return JSON.stringify(data) - } - - function deserialize (text) { - if (format == 'yaml') return yaml.safeLoad(text) - return JSON.parse(text) - } - - function save () { - var payload = encode(String(serialize(self) || '{}')) + const serialize = (data) => { + return format == 'yaml' + ? yaml.safeDump(data) + : JSON.stringify(data) + }; + + const deserialize = (text) => { + return format == 'yaml' + ? yaml.safeLoad(text) + : JSON.parse(text) + }; + + const save = () => { + let payload = String(serialize(this) || '{}') + if (encrypt) payload = encode(payload, key); try { mkdirp.sync(dirpath, parseInt('0700', 8)) writeFileAtomic.sync(filepath, payload, { - mode: parseInt('0600', 8) + mode: parseInt('0600', 8), }) - } catch (err) {} + } catch (err) { + // eslint-disable-next-line no-console + console.error(err) + } } - function clear () { - for (var o in self) delete self[o] + const clear = () => { + for (let o in this) delete this[o] save() } if (Object.defineProperty) { - Object.defineProperty(self, "save", { + Object.defineProperty(this, 'save', { enumerable: false, writable: false, - value: save + value: save, }); - Object.defineProperty(self, "clear", { + Object.defineProperty(this, 'clear', { enumerable: false, writable: false, - value: clear + value: clear, }); } + // Try to read and decode preferences saved on disc + let fileContents = ''; try { - // Try to read and decode preferences saved on disc - savedData = deserialize(decode(fs.readFileSync(filepath, 'utf8'))) - } catch (err) { + fileContents = fs.readFileSync(filepath, 'utf8') + } + catch (err) { // Read error (maybe file doesn't exist) so update with defaults savedData = defs || {} savePristine = true } - + if (fileContents) { + let results = fileContents + if (encrypt) { + try { + results = decode(fileContents, key) + } + catch (e) { + results = legacyDecode(fileContents, legacyPassword) + convertFromLegacy = true; + } + } + savedData = deserialize(results) + } + // Clone object - for (var o in savedData) self[o] = savedData[o] + for (let o in savedData) this[o] = savedData[o] // Config file was empty, save default values - savePristine && save() + savePristine || convertFromLegacy && save() // Save all on program exit process.on('exit', save) // If supported observe object for saving on modify - if (Object.observe) Object.observe(self, save) + if (Object.observe) Object.observe(this, save) - return self + return this } module.exports = Preferences diff --git a/lib/crypto.js b/lib/crypto.js new file mode 100644 index 0000000..567b9cb --- /dev/null +++ b/lib/crypto.js @@ -0,0 +1,29 @@ +const crypto = require('crypto') + +const algorithm = 'aes-256-ctr' +const inputEncoding = 'utf8' +const outputEncoding = 'hex' + +function encode (text, key) { + const iv = crypto.randomBytes(8).toString('hex') + const cipher = crypto.createCipheriv(algorithm, key, iv) + const crypted = cipher.update(text, inputEncoding, outputEncoding) + cipher.final(outputEncoding) + return `${iv.toString('hex')}:${crypted.toString()}` +} + +function decode (text, key) { + const [ivstring, encrypted] = text.split(':') + const decipher = crypto.createDecipheriv(algorithm, key, ivstring) + return decipher.update(encrypted, outputEncoding, inputEncoding) + decipher.final(inputEncoding) +} + +function legacyDecode (text, password) { + const decipher = crypto.createDecipher('aes128', password) + return decipher.update(String(text), outputEncoding, inputEncoding) + decipher.final(inputEncoding) +} + +module.exports = { + encode, + decode, + legacyDecode, +}; diff --git a/lib/toThirtytwo.js b/lib/toThirtytwo.js new file mode 100644 index 0000000..1df0421 --- /dev/null +++ b/lib/toThirtytwo.js @@ -0,0 +1,5 @@ +module.exports = (text, padding) => { + if (text.length === 32) return text + if (text.length < 32) return text.padEnd(32, padding); + if (text.length > 32) return text.slice(0, 32); +}; diff --git a/package-lock.json b/package-lock.json index 59faebe..186dc1c 100644 --- a/package-lock.json +++ b/package-lock.json @@ -1,9 +1,30 @@ { - "name": "preferences", - "version": "1.0.2", + "name": "prefs", + "version": "2.0.0", "lockfileVersion": 1, "requires": true, "dependencies": { + "ansi-colors": { + "version": "3.2.3", + "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-3.2.3.tgz", + "integrity": "sha512-LEHHyuhlPY3TmuUYMh2oz89lTShfvgbmzaBcxve9t/9Wuy7Dwf4yoAKcND7KFT1HAQfqZ12qtc+DUrBMeKF9nw==", + "dev": true + }, + "ansi-regex": { + "version": "3.0.0", + "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz", + "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=", + "dev": true + }, + "ansi-styles": { + "version": "3.2.1", + "resolved": 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"1.0.2", + "name": "prefs", + "version": "2.0.0", "description": "Manage CLI application encrypted preferences.", "main": "index.js", "types": "index.d.ts", @@ -8,6 +8,9 @@ "type": "git", "url": "git+https://github.com/CaffeinaLab/preferences.git" }, + "scripts": { + "test": "mocha" + }, "keywords": [ "config", "cli", @@ -16,16 +19,21 @@ "secure" ], "author": "Stefano Azzolini (http://caffeina.it)", + "contributors": [ + "David Goodwin " + ], "license": "MIT", "bugs": { "url": "https://github.com/CaffeinaLab/preferences/issues" }, "homepage": "https://github.com/CaffeinaLab/preferences#readme", "dependencies": { - "graceful-fs": "^4.1.2", + "graceful-fs": "^4.1.15", "js-yaml": "^3.13.1", "mkdirp": "^0.5.1", - "os-homedir": "^1.0.1", "write-file-atomic": "^1.1.3" + }, + "devDependencies": { + "mocha": "^6.1.4" } } diff --git a/test/crypto.test.js b/test/crypto.test.js new file mode 100644 index 0000000..bc2a341 --- /dev/null +++ b/test/crypto.test.js @@ -0,0 +1,27 @@ +const { encode, decode } = require('../lib/crypto') +const fs = require('fs'); +const path = require('path') +const os = require('os') +const crypto = require('crypto'); +const assert = require('assert') +const homedir = os.homedir() + +let key = ''; + +try { + const file = path.join(homedir, '.ssh', 'id_rsa') + key = fs.readFileSync(file).toString('utf8').slice(0, 32) +} catch (e) { + key = crypto.randomBytes(32); +} + +describe('Crypto module', () => { + it('can encrypt and decrypt a message', () => { + const text = 'This is a secret message.'; + + const enc = encode(text, key); + const decoded = decode(enc, key); + + assert.equal(text, decoded) + }) +})