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author | Bjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com> | 2021-12-12 12:11:11 +0100 |
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committer | Bjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com> | 2021-12-16 09:40:22 +0100 |
commit | f4389e48ce0a70807362772d66c12ab5cd9e15f8 (patch) | |
tree | 1334516a199dcdf4133758e3664348287e73e88b /common/herrors/errors.go | |
parent | 803f572e66c5e22213ddcc994c41b3e80e9c1f35 (diff) |
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 = ['.*']
```
Diffstat (limited to 'common/herrors/errors.go')
-rw-r--r-- | common/herrors/errors.go | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/common/herrors/errors.go b/common/herrors/errors.go index fded30b1a..00aed1eb6 100644 --- a/common/herrors/errors.go +++ b/common/herrors/errors.go @@ -88,3 +88,10 @@ func GetGID() uint64 { // We will, at least to begin with, make some Hugo features (SCSS with libsass) optional, // and this error is used to signal those situations. var ErrFeatureNotAvailable = errors.New("this feature is not available in your current Hugo version, see https://goo.gl/YMrWcn for more information") + +// Must panics if err != nil. +func Must(err error) { + if err != nil { + panic(err) + } +} |