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62 lines
1.6 KiB
Go
62 lines
1.6 KiB
Go
package webhook
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import (
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"context"
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"fmt"
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"net/http"
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"go.step.sm/linkedca"
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"github.com/smallstep/certificates/authority/provisioner"
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"github.com/smallstep/certificates/webhook"
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)
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// Controller controls webhook execution
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type Controller struct {
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client *http.Client
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webhooks []*provisioner.Webhook
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}
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// New returns a new SCEP webhook Controller
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func New(webhooks []*provisioner.Webhook) (*Controller, error) {
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return &Controller{
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client: http.DefaultClient,
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webhooks: webhooks,
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}, nil
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}
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// Validate executes zero or more configured webhooks to
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// validate the SCEP challenge. If at least one of indicates
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// the challenge value is accepted, validation succeeds. Other
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// webhooks will not be executed. If none of the webhooks
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// indicates the challenge is accepted, an error is
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// returned.
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func (c *Controller) Validate(ctx context.Context, challenge string) error {
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for _, wh := range c.webhooks {
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if wh.Kind != linkedca.Webhook_SCEPCHALLENGE.String() {
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continue
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}
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if !c.isCertTypeOK(wh) {
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continue
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}
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req := &webhook.RequestBody{
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SCEPChallenge: challenge,
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}
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resp, err := wh.DoWithContext(ctx, c.client, req, nil) // TODO(hs): support templated URL? Requires some refactoring
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if err != nil {
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return fmt.Errorf("failed executing webhook request: %w", err)
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}
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if resp.Allow {
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return nil // return early when response is positive
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}
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}
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return provisioner.ErrWebhookDenied
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}
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// isCertTypeOK returns whether or not the webhook is for X.509
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// certificates.
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func (c *Controller) isCertTypeOK(wh *provisioner.Webhook) bool {
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return linkedca.Webhook_X509.String() == wh.CertType
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}
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