Change CSP config format to be more intuitive

This commit is contained in:
Literallie 2017-10-20 12:31:16 +02:00
parent 5b83deb043
commit 91101c856c
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GPG key ID: 7BE463C902ED152C
5 changed files with 48 additions and 14 deletions

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@ -158,6 +158,7 @@ Environment variables (will overwrite other server configs)
| HMD_HSTS_INCLUDE_SUBDOMAINS | `true` | set to include subdomains in HSTS (default is `true`) |
| HMD_HSTS_MAX_AGE | `31536000` | max duration in seconds to tell clients to keep HSTS status (default is a year) |
| HMD_HSTS_PRELOAD | `true` | whether to allow preloading of the site's HSTS status (e.g. into browsers) |
| HMD_CSP_ENABLE | `true` | whether to enable Content Security Policy (directives cannot be configured with environment variables) |
Application settings `config.json`
---
@ -171,6 +172,7 @@ Application settings `config.json`
| alloworigin | `['localhost']` | domain name whitelist |
| usessl | `true` or `false` | set to use ssl server (if true will auto turn on `protocolusessl`) |
| hsts | `{"enable": "true", "maxAgeSeconds": "31536000", "includeSubdomains": "true", "preload": "true"}` | [HSTS](https://en.wikipedia.org/wiki/HTTP_Strict_Transport_Security) options to use with HTTPS (default is the example value, max age is a year) |
| csp | `{"enable": "true", "directives": {"scriptSrc": "trustwodthy-scripts.example.com"}, "upgradeInsecureRequests": "auto", "addDefaults": "true"}` | Configures [Content Security Policy](https://helmetjs.github.io/docs/csp/). Directives are directly passed to Helmet, so [their format](https://helmetjs.github.io/docs/csp/) applies. Further, some defaults are added so that the application doesn't break. To disable adding these defaults, set `addDefaults` to `false`. If `usecdn` is on, default CDN locations are allowed too. By default (`auto`), insecure (HTTP) requests are upgraded to HTTPS via CSP if `usessl` is on. To change this behaviour, set `upgradeInsecureRequests` to either `true` or `false`. |
| protocolusessl | `true` or `false` | set to use ssl protocol for resources path (only applied when domain is set) |
| urladdport | `true` or `false` | set to add port on callback url (port 80 or 443 won't applied) (only applied when domain is set) |
| usecdn | `true` or `false` | set to use CDN resources or not (default is `true`) |

40
app.js
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@ -125,7 +125,28 @@ function getCspWebSocketUrl (req, res) {
return (req.protocol === 'http' ? 'ws:' : 'wss:') + config.serverurl.replace(/https?:/, "")
}
function mergeWithDefaults(configured, defaultDirective, cdnDirective) {
var directive = [].concat(configured)
if (config.csp.addDefaults && defaultDirective) {
directive = directive.concat(defaultDirective)
}
if (config.usecdn && cdnDirective) {
directive = directive.concat(cdnDirective)
}
return directive
}
if (config.csp.enable) {
var defaultDirectives = {
defaultSrc: ['\'self\''],
scriptSrc: ['\'self\'', 'vimeo.com', 'https://gist.github.com', 'www.slideshare.net', 'https://query.yahooapis.com', 'https://*.disqus.com', '\'unsafe-eval\''], // TODO: Remove unsafe-eval - webpack script-loader issues
imgSrc: ['*'],
styleSrc: ['\'self\'', '\'unsafe-inline\'', 'https://assets-cdn.github.com'], // unsafe-inline is required for some libs, plus used in views
fontSrc: ['\'self\'', 'https://public.slidesharecdn.com'],
objectSrc: ['*'], // Chrome PDF viewer treats PDFs as objects :/
childSrc: ['*'],
connectSrc: ['\'self\'', 'https://links.services.disqus.com', 'wss://realtime.services.disqus.com']
};
var cdnDirectives = {
scriptSrc: ['https://cdnjs.cloudflare.com', 'https://cdn.mathjax.org'],
styleSrc: ['https://cdnjs.cloudflare.com', 'https://fonts.googleapis.com'],
@ -134,11 +155,20 @@ if (config.csp.enable) {
var directives = {}
for (var propertyName in config.csp.directives) {
if (config.csp.directives.hasOwnProperty(propertyName)) {
var directive = [].concat(config.csp.directives[propertyName])
if (config.usecdn && !!cdnDirectives[propertyName]) {
directive = directive.concat(cdnDirectives[propertyName])
}
directives[propertyName] = directive
directives[propertyName] = mergeWithDefaults(
config.csp.directives[propertyName],
defaultDirectives[propertyName],
cdnDirectives[propertyName]
)
}
}
for (var propertyName in defaultDirectives) {
if (!directives[propertyName]) {
directives[propertyName] = mergeWithDefaults(
[],
defaultDirectives[propertyName],
cdnDirectives[propertyName]
)
}
}
directives.scriptSrc.push(getCspNonce)

View file

@ -22,6 +22,13 @@
"includeSubdomains": "true",
"preload": "true"
},
csp: {
"enable": "true",
"directives": {
},
"upgradeInsecureRequests": "auto"
"addDefaults": "true"
},
"db": {
"username": "",
"password": "",

View file

@ -15,17 +15,9 @@ module.exports = {
},
csp: {
enable: true,
reportUri: '',
directives: {
defaultSrc: ["'self'"],
scriptSrc: ["'self'", "'unsafe-eval'", "vimeo.com", "https://gist.github.com", "www.slideshare.net", "https://query.yahooapis.com", "https://*.disqus.com"],
imgSrc: ["*"],
styleSrc: ["'self'", "'unsafe-inline'", "https://assets-cdn.github.com"],
fontSrc: ["'self'", "https://public.slidesharecdn.com"],
objectSrc: ["*"],
childSrc: ["*"],
connectSrc: ["'self'", "https://links.services.disqus.com", "wss://realtime.services.disqus.com"]
},
addDefaults: true,
upgradeInsecureRequests: 'auto'
},
protocolusessl: false,

View file

@ -14,6 +14,9 @@ module.exports = {
includeSubdomains: toBooleanConfig(process.env.HMD_HSTS_INCLUDE_SUBDOMAINS),
preload: toBooleanConfig(process.env.HMD_HSTS_PRELOAD)
},
csp: {
enable: toBooleanConfig(process.env.HMD_CSP_ENABLE)
},
protocolusessl: toBooleanConfig(process.env.HMD_PROTOCOL_USESSL),
alloworigin: process.env.HMD_ALLOW_ORIGIN ? process.env.HMD_ALLOW_ORIGIN.split(',') : undefined,
usecdn: toBooleanConfig(process.env.HMD_USECDN),