pomerium/authenticate/providers/okta.go

74 lines
2 KiB
Go

package providers // import "github.com/pomerium/pomerium/internal/providers"
import (
"context"
"errors"
"net/url"
oidc "github.com/pomerium/go-oidc"
"golang.org/x/oauth2"
"github.com/pomerium/pomerium/internal/httputil"
"github.com/pomerium/pomerium/internal/sessions"
"github.com/pomerium/pomerium/internal/version"
)
// OktaProvider provides a standard, OpenID Connect implementation
// of an authorization identity provider.
type OktaProvider struct {
*ProviderData
// non-standard oidc fields
RevokeURL *url.URL
}
// NewOktaProvider creates a new instance of an OpenID Connect provider.
func NewOktaProvider(p *ProviderData) (*OktaProvider, error) {
ctx := context.Background()
if p.ProviderURL == "" {
return nil, errors.New("missing required provider url")
}
provider, err := oidc.NewProvider(ctx, p.ProviderURL)
if err != nil {
return nil, err
}
p.verifier = provider.Verifier(&oidc.Config{ClientID: p.ClientID})
p.oauth = &oauth2.Config{
ClientID: p.ClientID,
ClientSecret: p.ClientSecret,
Endpoint: provider.Endpoint(),
RedirectURL: p.RedirectURL.String(),
Scopes: []string{oidc.ScopeOpenID, "profile", "email"},
}
oktaProvider := OktaProvider{ProviderData: p}
// okta supports a revokation endpoint
var claims struct {
RevokeURL string `json:"revocation_endpoint"`
}
if err := provider.Claims(&claims); err != nil {
return nil, err
}
oktaProvider.RevokeURL, err = url.Parse(claims.RevokeURL)
if err != nil {
return nil, err
}
return &oktaProvider, nil
}
// Revoke revokes the access token a given session state.
// https://developer.okta.com/docs/api/resources/oidc#revoke
func (p *OktaProvider) Revoke(s *sessions.SessionState) error {
params := url.Values{}
params.Add("client_id", p.ClientID)
params.Add("client_secret", p.ClientSecret)
params.Add("token", s.IDToken)
params.Add("token_type_hint", "refresh_token")
err := httputil.Client("POST", p.RevokeURL.String(), version.UserAgent(), params, nil)
if err != nil && err != httputil.ErrTokenRevoked {
return err
}
return nil
}