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feat: add webhook authentication in the API
Authentication is off by default. Running with --token-webhook-url option will enable it. If enabled, unauthenticated requests are not allowed. Signed-off-by: Donnie Adams <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,39 @@ | ||
| package cookie | ||
|
|
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| import ( | ||
| "net/http" | ||
|
|
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| "k8s.io/apiserver/pkg/authentication/authenticator" | ||
| ) | ||
|
|
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| type Auth struct { | ||
| next authenticator.Request | ||
| } | ||
|
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| func New(next authenticator.Request) authenticator.Request { | ||
| return &Auth{ | ||
| next: next, | ||
| } | ||
| } | ||
|
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| func (c *Auth) AuthenticateRequest(req *http.Request) (*authenticator.Response, bool, error) { | ||
| if c.next == nil { | ||
| return nil, false, nil | ||
| } | ||
|
|
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| token, ok := GetCookieToken(req) | ||
| if ok && token != "" { | ||
| req.Header.Set("Authorization", "Bearer "+token) | ||
| } | ||
|
|
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| return c.next.AuthenticateRequest(req) | ||
| } | ||
|
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| func GetCookieToken(req *http.Request) (string, bool) { | ||
| c, err := req.Cookie("A_SESS") | ||
| if err != nil { | ||
| return "", false | ||
| } | ||
|
|
||
| return c.Value, true | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| package webhook | ||
|
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| import ( | ||
| "net/url" | ||
| "time" | ||
|
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| "github.com/acorn-io/baaah/pkg/ratelimit" | ||
| "github.com/acorn-io/baaah/pkg/restconfig" | ||
| authenticationv1 "k8s.io/api/authentication/v1" | ||
| "k8s.io/apimachinery/pkg/runtime" | ||
| "k8s.io/apiserver/pkg/authentication/authenticator" | ||
| "k8s.io/apiserver/pkg/authentication/request/bearertoken" | ||
| "k8s.io/apiserver/pkg/authentication/token/cache" | ||
| "k8s.io/apiserver/pkg/server/options" | ||
| "k8s.io/apiserver/plugin/pkg/authenticator/token/webhook" | ||
| "k8s.io/client-go/rest" | ||
| ) | ||
|
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| func New(scheme *runtime.Scheme, webhookURL string) (authenticator.Request, error) { | ||
| restConfig, err := restCfg(webhookURL, scheme) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| wh, err := webhook.New(restConfig, authenticationv1.SchemeGroupVersion.Version, nil, *options.DefaultAuthWebhookRetryBackoff()) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| tokenCache := cache.New(wh, false, 10*time.Second, 10*time.Second) | ||
| return bearertoken.New(tokenCache), nil | ||
| } | ||
|
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| func restCfg(serverURL string, scheme *runtime.Scheme) (*rest.Config, error) { | ||
| u, err := url.Parse(serverURL) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| insecure := false | ||
| if u.Scheme == "https" && u.Host == "localhost" { | ||
| insecure = true | ||
| } | ||
|
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| cfg := &rest.Config{ | ||
| Host: serverURL, | ||
| TLSClientConfig: rest.TLSClientConfig{ | ||
| Insecure: insecure, | ||
| }, | ||
| RateLimiter: ratelimit.None, | ||
| } | ||
|
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| restconfig.SetScheme(cfg, scheme) | ||
| return cfg, nil | ||
| } |