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package op
import (
"context"
"errors"
"net/http"
"strings"
httphelper "github.com/zitadel/oidc/v3/pkg/http"
"github.com/zitadel/oidc/v3/pkg/oidc"
)
type UserinfoProvider interface {
Decoder() httphelper.Decoder
Crypto() Crypto
Storage() Storage
AccessTokenVerifier(context.Context) *AccessTokenVerifier
}
func userinfoHandler(userinfoProvider UserinfoProvider) func(http.ResponseWriter, *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
Userinfo(w, r, userinfoProvider)
}
}
func Userinfo(w http.ResponseWriter, r *http.Request, userinfoProvider UserinfoProvider) {
ctx, span := tracer.Start(r.Context(), "Userinfo")
r = r.WithContext(ctx)
defer span.End()
accessToken, err := ParseUserinfoRequest(r, userinfoProvider.Decoder())
if err != nil {
http.Error(w, "access token missing", http.StatusUnauthorized)
return
}
tokenID, subject, ok := getTokenIDAndSubject(r.Context(), userinfoProvider, accessToken)
if !ok {
http.Error(w, "access token invalid", http.StatusUnauthorized)
return
}
info := new(oidc.UserInfo)
err = userinfoProvider.Storage().SetUserinfoFromToken(r.Context(), info, tokenID, subject, r.Header.Get("origin"))
if err != nil {
httphelper.MarshalJSONWithStatus(w, err, http.StatusForbidden)
return
}
httphelper.MarshalJSON(w, info)
}
func ParseUserinfoRequest(r *http.Request, decoder httphelper.Decoder) (string, error) {
ctx, span := tracer.Start(r.Context(), "ParseUserinfoRequest")
r = r.WithContext(ctx)
defer span.End()
accessToken, err := getAccessToken(r)
if err == nil {
return accessToken, nil
}
err = r.ParseForm()
if err != nil {
return "", errors.New("unable to parse request")
}
req := new(oidc.UserInfoRequest)
err = decoder.Decode(req, r.Form)
if err != nil {
return "", errors.New("unable to parse request")
}
return req.AccessToken, nil
}
func getAccessToken(r *http.Request) (string, error) {
ctx, span := tracer.Start(r.Context(), "getAccessToken")
r = r.WithContext(ctx)
defer span.End()
authHeader := r.Header.Get("authorization")
if authHeader == "" {
return "", errors.New("no auth header")
}
parts := strings.Split(authHeader, "Bearer ")
if len(parts) != 2 {
return "", errors.New("invalid auth header")
}
return parts[1], nil
}
func getTokenIDAndSubject(ctx context.Context, userinfoProvider UserinfoProvider, accessToken string) (string, string, bool) {
ctx, span := tracer.Start(ctx, "getTokenIDAndSubject")
defer span.End()
tokenIDSubject, err := userinfoProvider.Crypto().Decrypt(accessToken)
if err == nil {
splitToken := strings.Split(tokenIDSubject, ":")
if len(splitToken) != 2 {
return "", "", false
}
return splitToken[0], splitToken[1], true
}
accessTokenClaims, err := VerifyAccessToken[*oidc.AccessTokenClaims](ctx, accessToken, userinfoProvider.AccessTokenVerifier(ctx))
if err != nil {
return "", "", false
}
return accessTokenClaims.JWTID, accessTokenClaims.Subject, true
}
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