func (c *OpenIDConnectImplicitHandler) HandleAuthorizeEndpointRequest(ctx context.Context, req *http.Request, ar fosite.AuthorizeRequester, resp fosite.AuthorizeResponder) error {
if !(ar.GetGrantedScopes().Has("openid") && (ar.GetResponseTypes().Has("token", "id_token") || ar.GetResponseTypes().Exact("id_token"))) {
return nil
} else if ar.GetResponseTypes().Has("code") {
// hybrid flow
return nil
}
if !ar.GetClient().GetGrantTypes().Has("implicit") {
return errors.Wrap(fosite.ErrInvalidGrant, "The client is not allowed to use implicit grant type")
}
if ar.GetResponseTypes().Exact("id_token") && !ar.GetClient().GetResponseTypes().Has("id_token") {
return errors.Wrap(fosite.ErrInvalidGrant, "The client is not allowed to use response type id_token")
} else if ar.GetResponseTypes().Matches("token", "id_token") && !ar.GetClient().GetResponseTypes().Has("token", "id_token") {
return errors.Wrap(fosite.ErrInvalidGrant, "The client is not allowed to use response type token and id_token")
}
client := ar.GetClient()
for _, scope := range ar.GetRequestedScopes() {
if !c.ScopeStrategy(client.GetScopes(), scope) {
return errors.Wrap(fosite.ErrInvalidScope, fmt.Sprintf("The client is not allowed to request scope %s", scope))
}
}
sess, ok := ar.GetSession().(Session)
if !ok {
return errors.Wrap(ErrInvalidSession, "")
}
claims := sess.IDTokenClaims()
if ar.GetResponseTypes().Has("token") {
if err := c.AuthorizeImplicitGrantTypeHandler.IssueImplicitAccessToken(ctx, req, ar, resp); err != nil {
return errors.Wrap(err, err.Error())
}
ar.SetResponseTypeHandled("token")
hash, err := c.RS256JWTStrategy.Hash([]byte(resp.GetFragment().Get("access_token")))
if err != nil {
return err
}
claims.AccessTokenHash = []byte(base64.URLEncoding.EncodeToString([]byte(hash[:c.RS256JWTStrategy.GetSigningMethodLength()/2])))
} else {
resp.AddFragment("state", ar.GetState())
}
if err := c.IssueImplicitIDToken(ctx, req, ar, resp); err != nil {
return errors.Wrap(err, err.Error())
}
// there is no need to check for https, because implicit flow does not require https
// https://tools.ietf.org/html/rfc6819#section-4.4.2
ar.SetResponseTypeHandled("id_token")
return nil
}
