hugo/config
Bjørn Erik Pedersen f4389e48ce
Add some basic security policies with sensible defaults
This ommmit contains some security hardening measures for the Hugo build runtime.

There are some rarely used features in Hugo that would be good to have disabled by default. One example would be the "external helpers".

For `asciidoctor` and some others we use Go's `os/exec` package to start a new process.

These are a predefined set of binary names, all loaded from `PATH` and with a predefined set of arguments. Still, if you don't use `asciidoctor` in your project, you might as well have it turned off.

You can configure your own in the new `security` configuration section, but the defaults are configured to create a minimal amount of site breakage. And if that do happen, you will get clear instructions in the loa about what to do.

The default configuration is listed below. Note that almost all of these options are regular expression _whitelists_ (a string or a slice); the value `none` will block all.

```toml
[security]
  enableInlineShortcodes = false
  [security.exec]
    allow = ['^dart-sass-embedded$', '^go$', '^npx$', '^postcss$']
    osEnv = ['(?i)^(PATH|PATHEXT|APPDATA|TMP|TEMP|TERM)$']

  [security.funcs]
    getenv = ['^HUGO_']

  [security.http]
    methods = ['(?i)GET|POST']
    urls = ['.*']
```
2021-12-16 09:40:22 +01:00
..
privacy Misc config loading fixes 2021-06-14 17:00:32 +02:00
security Add some basic security policies with sensible defaults 2021-12-16 09:40:22 +01:00
services Misc config loading fixes 2021-06-14 17:00:32 +02:00
commonConfig.go all: Fix minor typos 2020-12-16 12:11:32 +01:00
commonConfig_test.go Misc config loading fixes 2021-06-14 17:00:32 +02:00
compositeConfig.go config: Fix merge of config with map[string]string values. 2021-06-22 21:38:28 +02:00
compositeConfig_test.go Misc config loading fixes 2021-06-14 17:00:32 +02:00
configLoader.go Make sure module config loading errors have file positioning info 2021-08-03 09:57:14 +02:00
configLoader_test.go tests: Convert from testify to quicktest 2019-08-12 13:26:32 +02:00
configProvider.go config: Fix merge of config with map[string]string values. 2021-06-22 21:38:28 +02:00
configProvider_test.go Misc config loading fixes 2021-06-14 17:00:32 +02:00
defaultConfigProvider.go Add some basic security policies with sensible defaults 2021-12-16 09:40:22 +01:00
defaultConfigProvider_test.go Fix it so disableKinds etc. does not get merged in from theme 2021-08-22 13:25:20 +02:00
docshelper.go Misc config loading fixes 2021-06-14 17:00:32 +02:00
env.go config: Fix env split to allow = character in values 2021-05-30 20:25:37 +02:00
env_test.go tests: Convert from testify to quicktest 2019-08-12 13:26:32 +02:00