/
session.go
85 lines (78 loc) · 2.55 KB
/
session.go
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package op
import (
"context"
"net/http"
httphelper "github.com/caos/oidc/pkg/http"
"github.com/caos/oidc/pkg/oidc"
)
type SessionEnder interface {
Decoder() httphelper.Decoder
Storage() Storage
IDTokenHintVerifier() IDTokenHintVerifier
DefaultLogoutRedirectURI() string
}
func endSessionHandler(ender SessionEnder) func(http.ResponseWriter, *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
EndSession(w, r, ender)
}
}
func EndSession(w http.ResponseWriter, r *http.Request, ender SessionEnder) {
req, err := ParseEndSessionRequest(r, ender.Decoder())
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
session, err := ValidateEndSessionRequest(r.Context(), req, ender)
if err != nil {
RequestError(w, r, err)
return
}
var clientID string
if session.Client != nil {
clientID = session.Client.GetID()
}
err = ender.Storage().TerminateSession(r.Context(), session.UserID, clientID)
if err != nil {
RequestError(w, r, oidc.DefaultToServerError(err, "error terminating session"))
return
}
http.Redirect(w, r, session.RedirectURI, http.StatusFound)
}
func ParseEndSessionRequest(r *http.Request, decoder httphelper.Decoder) (*oidc.EndSessionRequest, error) {
err := r.ParseForm()
if err != nil {
return nil, oidc.ErrInvalidRequest().WithDescription("error parsing form").WithParent(err)
}
req := new(oidc.EndSessionRequest)
err = decoder.Decode(req, r.Form)
if err != nil {
return nil, oidc.ErrInvalidRequest().WithDescription("error decoding form").WithParent(err)
}
return req, nil
}
func ValidateEndSessionRequest(ctx context.Context, req *oidc.EndSessionRequest, ender SessionEnder) (*EndSessionRequest, error) {
session := new(EndSessionRequest)
if req.IdTokenHint == "" {
return session, nil
}
claims, err := VerifyIDTokenHint(ctx, req.IdTokenHint, ender.IDTokenHintVerifier())
if err != nil {
return nil, oidc.ErrInvalidRequest().WithDescription("id_token_hint invalid").WithParent(err)
}
session.UserID = claims.GetSubject()
session.Client, err = ender.Storage().GetClientByClientID(ctx, claims.GetAuthorizedParty())
if err != nil {
return nil, oidc.DefaultToServerError(err, "")
}
if req.PostLogoutRedirectURI == "" {
session.RedirectURI = ender.DefaultLogoutRedirectURI()
return session, nil
}
for _, uri := range session.Client.PostLogoutRedirectURIs() {
if uri == req.PostLogoutRedirectURI {
session.RedirectURI = uri + "?state=" + req.State
return session, nil
}
}
return nil, oidc.ErrInvalidRequest().WithDescription("post_logout_redirect_uri invalid")
}