124 lines
3.5 KiB
Go
124 lines
3.5 KiB
Go
/*
|
|
GoToSocial
|
|
Copyright (C) 2021-2023 GoToSocial Authors admin@gotosocial.org
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Affero General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Affero General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Affero General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
package oidc
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
|
|
"github.com/coreos/go-oidc/v3/oidc"
|
|
"github.com/superseriousbusiness/gotosocial/internal/config"
|
|
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
|
|
"golang.org/x/oauth2"
|
|
)
|
|
|
|
const (
|
|
// CallbackPath is the API path for receiving callback tokens from external OIDC providers
|
|
CallbackPath = "/auth/callback"
|
|
)
|
|
|
|
// IDP contains logic for parsing an OIDC access code into a set of claims by calling an external OIDC provider.
|
|
type IDP interface {
|
|
// HandleCallback accepts a context (pass the context from the http.Request), and an oauth2 code as returned from a successful
|
|
// login through an OIDC provider. It uses the code to request a token from the OIDC provider, which should contain an id_token
|
|
// with a set of claims.
|
|
//
|
|
// Note that this function *does not* verify state. That should be handled by the caller *before* this function is called.
|
|
HandleCallback(ctx context.Context, code string) (*Claims, gtserror.WithCode)
|
|
// AuthCodeURL returns the proper redirect URL for this IDP, for redirecting requesters to the correct OIDC endpoint.
|
|
AuthCodeURL(state string) string
|
|
}
|
|
|
|
type idp struct {
|
|
oauth2Config oauth2.Config
|
|
provider *oidc.Provider
|
|
oidcConf *oidc.Config
|
|
}
|
|
|
|
// NewIDP returns a new IDP configured with the given config.
|
|
func NewIDP(ctx context.Context) (IDP, error) {
|
|
// validate config fields
|
|
idpName := config.GetOIDCIdpName()
|
|
if idpName == "" {
|
|
return nil, fmt.Errorf("not set: IDPName")
|
|
}
|
|
|
|
issuer := config.GetOIDCIssuer()
|
|
if issuer == "" {
|
|
return nil, fmt.Errorf("not set: Issuer")
|
|
}
|
|
|
|
clientID := config.GetOIDCClientID()
|
|
if clientID == "" {
|
|
return nil, fmt.Errorf("not set: ClientID")
|
|
}
|
|
|
|
clientSecret := config.GetOIDCClientSecret()
|
|
if clientSecret == "" {
|
|
return nil, fmt.Errorf("not set: ClientSecret")
|
|
}
|
|
|
|
scopes := config.GetOIDCScopes()
|
|
if len(scopes) == 0 {
|
|
return nil, fmt.Errorf("not set: Scopes")
|
|
}
|
|
|
|
provider, err := oidc.NewProvider(ctx, issuer)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
protocol := config.GetProtocol()
|
|
host := config.GetHost()
|
|
|
|
oauth2Config := oauth2.Config{
|
|
// client_id and client_secret of the client.
|
|
ClientID: clientID,
|
|
ClientSecret: clientSecret,
|
|
|
|
// The redirectURL.
|
|
RedirectURL: fmt.Sprintf("%s://%s%s", protocol, host, CallbackPath),
|
|
|
|
// Discovery returns the OAuth2 endpoints.
|
|
Endpoint: provider.Endpoint(),
|
|
|
|
// "openid" is a required scope for OpenID Connect flows.
|
|
//
|
|
// Other scopes, such as "groups" can be requested.
|
|
Scopes: scopes,
|
|
}
|
|
|
|
// create a config for verifier creation
|
|
oidcConf := &oidc.Config{
|
|
ClientID: clientID,
|
|
}
|
|
|
|
if config.GetOIDCSkipVerification() {
|
|
oidcConf.SkipClientIDCheck = true
|
|
oidcConf.SkipExpiryCheck = true
|
|
oidcConf.SkipIssuerCheck = true
|
|
}
|
|
|
|
return &idp{
|
|
oauth2Config: oauth2Config,
|
|
oidcConf: oidcConf,
|
|
provider: provider,
|
|
}, nil
|
|
}
|