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// Copyright 2024 New Vector Ltd.
// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
// Please see LICENSE files in the repository root for full details.
package auth
import (
"context"
"net/http"
"strings"
"github.com/element-hq/dendrite/clientapi/auth/authtypes"
"github.com/element-hq/dendrite/clientapi/httputil"
"github.com/element-hq/dendrite/clientapi/userutil"
"github.com/element-hq/dendrite/setup/config"
"github.com/element-hq/dendrite/userapi/api"
"github.com/matrix-org/gomatrixserverlib/spec"
"github.com/matrix-org/util"
)
type GetAccountByPassword func(ctx context.Context, req *api.QueryAccountByPasswordRequest, res *api.QueryAccountByPasswordResponse) error
type PasswordRequest struct {
Login
Password string `json:"password"`
}
// LoginTypePassword implements https://matrix.org/docs/spec/client_server/r0.6.1#password-based
type LoginTypePassword struct {
GetAccountByPassword GetAccountByPassword
Config *config.ClientAPI
}
func (t *LoginTypePassword) Name() string {
return authtypes.LoginTypePassword
}
func (t *LoginTypePassword) LoginFromJSON(ctx context.Context, reqBytes []byte) (*Login, LoginCleanupFunc, *util.JSONResponse) {
var r PasswordRequest
if err := httputil.UnmarshalJSON(reqBytes, &r); err != nil {
return nil, nil, err
}
login, err := t.Login(ctx, &r)
if err != nil {
return nil, nil, err
}
return login, func(context.Context, *util.JSONResponse) {}, nil
}
func (t *LoginTypePassword) Login(ctx context.Context, req interface{}) (*Login, *util.JSONResponse) {
r := req.(*PasswordRequest)
username := r.Username()
if username == "" {
return nil, &util.JSONResponse{
Code: http.StatusUnauthorized,
JSON: spec.BadJSON("A username must be supplied."),
}
}
if len(r.Password) == 0 {
return nil, &util.JSONResponse{
Code: http.StatusUnauthorized,
JSON: spec.BadJSON("A password must be supplied."),
}
}
localpart, domain, err := userutil.ParseUsernameParam(username, t.Config.Matrix)
if err != nil {
return nil, &util.JSONResponse{
Code: http.StatusUnauthorized,
JSON: spec.InvalidUsername(err.Error()),
}
}
if !t.Config.Matrix.IsLocalServerName(domain) {
return nil, &util.JSONResponse{
Code: http.StatusUnauthorized,
JSON: spec.InvalidUsername("The server name is not known."),
}
}
// Squash username to all lowercase letters
res := &api.QueryAccountByPasswordResponse{}
err = t.GetAccountByPassword(ctx, &api.QueryAccountByPasswordRequest{
Localpart: strings.ToLower(localpart),
ServerName: domain,
PlaintextPassword: r.Password,
}, res)
if err != nil {
return nil, &util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.Unknown("Unable to fetch account by password."),
}
}
// If we couldn't find the user by the lower cased localpart, try the provided
// localpart as is.
if !res.Exists {
err = t.GetAccountByPassword(ctx, &api.QueryAccountByPasswordRequest{
Localpart: localpart,
ServerName: domain,
PlaintextPassword: r.Password,
}, res)
if err != nil {
return nil, &util.JSONResponse{
Code: http.StatusInternalServerError,
JSON: spec.Unknown("Unable to fetch account by password."),
}
}
// Technically we could tell them if the user does not exist by checking if err == sql.ErrNoRows
// but that would leak the existence of the user.
if !res.Exists {
return nil, &util.JSONResponse{
Code: http.StatusForbidden,
JSON: spec.Forbidden("The username or password was incorrect or the account does not exist."),
}
}
}
// Set the user, so login.Username() can do the right thing
r.Identifier.User = res.Account.UserID
r.User = res.Account.UserID
return &r.Login, nil
}
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