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// Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package smtp
import (
"context"
"errors"
"net/smtp"
"net/textproto"
"strings"
auth_model "code.gitea.io/gitea/models/auth"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/optional"
"code.gitea.io/gitea/modules/util"
)
// Authenticate queries if the provided login/password is authenticates against the SMTP server
// Users will be autoregistered as required
func (source *Source) Authenticate(ctx context.Context, user *user_model.User, userName, password string) (*user_model.User, error) {
// Verify allowed domains.
if len(source.AllowedDomains) > 0 {
idx := strings.Index(userName, "@")
if idx == -1 {
return nil, user_model.ErrUserNotExist{Name: userName}
} else if !util.SliceContainsString(strings.Split(source.AllowedDomains, ","), userName[idx+1:], true) {
return nil, user_model.ErrUserNotExist{Name: userName}
}
}
var auth smtp.Auth
switch source.Auth {
case PlainAuthentication:
auth = smtp.PlainAuth("", userName, password, source.Host)
case LoginAuthentication:
auth = &loginAuthenticator{userName, password}
case CRAMMD5Authentication:
auth = smtp.CRAMMD5Auth(userName, password)
default:
return nil, errors.New("unsupported SMTP auth type")
}
if err := Authenticate(auth, source); err != nil {
// Check standard error format first,
// then fallback to worse case.
tperr, ok := err.(*textproto.Error)
if (ok && tperr.Code == 535) ||
strings.Contains(err.Error(), "Username and Password not accepted") {
return nil, user_model.ErrUserNotExist{Name: userName}
}
if (ok && tperr.Code == 534) ||
strings.Contains(err.Error(), "Application-specific password required") {
return nil, user_model.ErrUserNotExist{Name: userName}
}
return nil, err
}
if user != nil {
return user, nil
}
username := userName
idx := strings.Index(userName, "@")
if idx > -1 {
username = userName[:idx]
}
user = &user_model.User{
LowerName: strings.ToLower(username),
Name: strings.ToLower(username),
Email: userName,
Passwd: password,
LoginType: auth_model.SMTP,
LoginSource: source.authSource.ID,
LoginName: userName,
}
overwriteDefault := &user_model.CreateUserOverwriteOptions{
IsActive: optional.Some(true),
}
if err := user_model.CreateUser(ctx, user, overwriteDefault); err != nil {
return user, err
}
return user, nil
}
// IsSkipLocalTwoFA returns if this source should skip local 2fa for password authentication
func (source *Source) IsSkipLocalTwoFA() bool {
return source.SkipLocalTwoFA
}
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