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gitea/services/auth/source/smtp/source_authenticate.go
techknowlogick f183783baa
Save initial signup information for users to aid in spam prevention ()
This will allow instance admins to view signup pattern patterns for
public instances. It is modelled after discourse, mastodon, and
MediaWiki's approaches.

Note: This has privacy implications, but as the above-stated open-source
projects take this approach, especially MediaWiki, which I have no doubt
looked into this thoroughly, it is likely okay for us, too. However, I
would be appreciative of any feedback on how this could be improved.

---------

Co-authored-by: Giteabot <teabot@gitea.io>
2024-09-09 17:05:16 -04:00

93 lines
2.6 KiB
Go

// 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, &user_model.Meta{}, 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
}