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gitea/routers/web/admin/auths.go
zeripath bbffcc3aec
Multiple Escaping Improvements (#17551)
There are multiple places where Gitea does not properly escape URLs that it is building and there are multiple places where it builds urls when there is already a simpler function available to use this.
    
This is an extensive PR attempting to fix these issues.

1. The first commit in this PR looks through all href, src and links in the Gitea codebase and has attempted to catch all the places where there is potentially incomplete escaping.
2. Whilst doing this we will prefer to use functions that create URLs over recreating them by hand.
3. All uses of strings should be directly escaped - even if they are not currently expected to contain escaping characters. The main benefit to doing this will be that we can consider relaxing the constraints on user names and reponames in future. 
4. The next commit looks at escaping in the wiki and re-considers the urls that are used there. Using the improved escaping here wiki files containing '/'. (This implementation will currently still place all of the wiki files the root directory of the repo but this would not be difficult to change.)
5. The title generation in feeds is now properly escaped.
6. EscapePound is no longer needed - urls should be PathEscaped / QueryEscaped as necessary but then re-escaped with Escape when creating html with locales Signed-off-by: Andrew Thornton <art27@cantab.net>

Signed-off-by: Andrew Thornton <art27@cantab.net>
2021-11-16 18:18:25 +00:00

429 lines
13 KiB
Go

// Copyright 2014 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package admin
import (
"errors"
"fmt"
"net/http"
"net/url"
"regexp"
"strconv"
"code.gitea.io/gitea/models/login"
"code.gitea.io/gitea/modules/auth/pam"
"code.gitea.io/gitea/modules/base"
"code.gitea.io/gitea/modules/context"
"code.gitea.io/gitea/modules/log"
"code.gitea.io/gitea/modules/setting"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/modules/web"
auth_service "code.gitea.io/gitea/services/auth"
"code.gitea.io/gitea/services/auth/source/ldap"
"code.gitea.io/gitea/services/auth/source/oauth2"
pamService "code.gitea.io/gitea/services/auth/source/pam"
"code.gitea.io/gitea/services/auth/source/smtp"
"code.gitea.io/gitea/services/auth/source/sspi"
"code.gitea.io/gitea/services/forms"
"xorm.io/xorm/convert"
)
const (
tplAuths base.TplName = "admin/auth/list"
tplAuthNew base.TplName = "admin/auth/new"
tplAuthEdit base.TplName = "admin/auth/edit"
)
var (
separatorAntiPattern = regexp.MustCompile(`[^\w-\.]`)
langCodePattern = regexp.MustCompile(`^[a-z]{2}-[A-Z]{2}$`)
)
// Authentications show authentication config page
func Authentications(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("admin.authentication")
ctx.Data["PageIsAdmin"] = true
ctx.Data["PageIsAdminAuthentications"] = true
var err error
ctx.Data["Sources"], err = login.Sources()
if err != nil {
ctx.ServerError("login.Sources", err)
return
}
ctx.Data["Total"] = login.CountSources()
ctx.HTML(http.StatusOK, tplAuths)
}
type dropdownItem struct {
Name string
Type interface{}
}
var (
authSources = func() []dropdownItem {
items := []dropdownItem{
{login.LDAP.String(), login.LDAP},
{login.DLDAP.String(), login.DLDAP},
{login.SMTP.String(), login.SMTP},
{login.OAuth2.String(), login.OAuth2},
{login.SSPI.String(), login.SSPI},
}
if pam.Supported {
items = append(items, dropdownItem{login.Names[login.PAM], login.PAM})
}
return items
}()
securityProtocols = []dropdownItem{
{ldap.SecurityProtocolNames[ldap.SecurityProtocolUnencrypted], ldap.SecurityProtocolUnencrypted},
{ldap.SecurityProtocolNames[ldap.SecurityProtocolLDAPS], ldap.SecurityProtocolLDAPS},
{ldap.SecurityProtocolNames[ldap.SecurityProtocolStartTLS], ldap.SecurityProtocolStartTLS},
}
)
// NewAuthSource render adding a new auth source page
func NewAuthSource(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("admin.auths.new")
ctx.Data["PageIsAdmin"] = true
ctx.Data["PageIsAdminAuthentications"] = true
ctx.Data["type"] = login.LDAP
ctx.Data["CurrentTypeName"] = login.Names[login.LDAP]
ctx.Data["CurrentSecurityProtocol"] = ldap.SecurityProtocolNames[ldap.SecurityProtocolUnencrypted]
ctx.Data["smtp_auth"] = "PLAIN"
ctx.Data["is_active"] = true
ctx.Data["is_sync_enabled"] = true
ctx.Data["AuthSources"] = authSources
ctx.Data["SecurityProtocols"] = securityProtocols
ctx.Data["SMTPAuths"] = smtp.Authenticators
oauth2providers := oauth2.GetOAuth2Providers()
ctx.Data["OAuth2Providers"] = oauth2providers
ctx.Data["SSPIAutoCreateUsers"] = true
ctx.Data["SSPIAutoActivateUsers"] = true
ctx.Data["SSPIStripDomainNames"] = true
ctx.Data["SSPISeparatorReplacement"] = "_"
ctx.Data["SSPIDefaultLanguage"] = ""
// only the first as default
ctx.Data["oauth2_provider"] = oauth2providers[0]
ctx.HTML(http.StatusOK, tplAuthNew)
}
func parseLDAPConfig(form forms.AuthenticationForm) *ldap.Source {
var pageSize uint32
if form.UsePagedSearch {
pageSize = uint32(form.SearchPageSize)
}
return &ldap.Source{
Name: form.Name,
Host: form.Host,
Port: form.Port,
SecurityProtocol: ldap.SecurityProtocol(form.SecurityProtocol),
SkipVerify: form.SkipVerify,
BindDN: form.BindDN,
UserDN: form.UserDN,
BindPassword: form.BindPassword,
UserBase: form.UserBase,
AttributeUsername: form.AttributeUsername,
AttributeName: form.AttributeName,
AttributeSurname: form.AttributeSurname,
AttributeMail: form.AttributeMail,
AttributesInBind: form.AttributesInBind,
AttributeSSHPublicKey: form.AttributeSSHPublicKey,
AttributeAvatar: form.AttributeAvatar,
SearchPageSize: pageSize,
Filter: form.Filter,
GroupsEnabled: form.GroupsEnabled,
GroupDN: form.GroupDN,
GroupFilter: form.GroupFilter,
GroupMemberUID: form.GroupMemberUID,
UserUID: form.UserUID,
AdminFilter: form.AdminFilter,
RestrictedFilter: form.RestrictedFilter,
AllowDeactivateAll: form.AllowDeactivateAll,
Enabled: true,
SkipLocalTwoFA: form.SkipLocalTwoFA,
}
}
func parseSMTPConfig(form forms.AuthenticationForm) *smtp.Source {
return &smtp.Source{
Auth: form.SMTPAuth,
Host: form.SMTPHost,
Port: form.SMTPPort,
AllowedDomains: form.AllowedDomains,
ForceSMTPS: form.ForceSMTPS,
SkipVerify: form.SkipVerify,
HeloHostname: form.HeloHostname,
DisableHelo: form.DisableHelo,
SkipLocalTwoFA: form.SkipLocalTwoFA,
}
}
func parseOAuth2Config(form forms.AuthenticationForm) *oauth2.Source {
var customURLMapping *oauth2.CustomURLMapping
if form.Oauth2UseCustomURL {
customURLMapping = &oauth2.CustomURLMapping{
TokenURL: form.Oauth2TokenURL,
AuthURL: form.Oauth2AuthURL,
ProfileURL: form.Oauth2ProfileURL,
EmailURL: form.Oauth2EmailURL,
Tenant: form.Oauth2Tenant,
}
} else {
customURLMapping = nil
}
return &oauth2.Source{
Provider: form.Oauth2Provider,
ClientID: form.Oauth2Key,
ClientSecret: form.Oauth2Secret,
OpenIDConnectAutoDiscoveryURL: form.OpenIDConnectAutoDiscoveryURL,
CustomURLMapping: customURLMapping,
IconURL: form.Oauth2IconURL,
SkipLocalTwoFA: form.SkipLocalTwoFA,
}
}
func parseSSPIConfig(ctx *context.Context, form forms.AuthenticationForm) (*sspi.Source, error) {
if util.IsEmptyString(form.SSPISeparatorReplacement) {
ctx.Data["Err_SSPISeparatorReplacement"] = true
return nil, errors.New(ctx.Tr("form.SSPISeparatorReplacement") + ctx.Tr("form.require_error"))
}
if separatorAntiPattern.MatchString(form.SSPISeparatorReplacement) {
ctx.Data["Err_SSPISeparatorReplacement"] = true
return nil, errors.New(ctx.Tr("form.SSPISeparatorReplacement") + ctx.Tr("form.alpha_dash_dot_error"))
}
if form.SSPIDefaultLanguage != "" && !langCodePattern.MatchString(form.SSPIDefaultLanguage) {
ctx.Data["Err_SSPIDefaultLanguage"] = true
return nil, errors.New(ctx.Tr("form.lang_select_error"))
}
return &sspi.Source{
AutoCreateUsers: form.SSPIAutoCreateUsers,
AutoActivateUsers: form.SSPIAutoActivateUsers,
StripDomainNames: form.SSPIStripDomainNames,
SeparatorReplacement: form.SSPISeparatorReplacement,
DefaultLanguage: form.SSPIDefaultLanguage,
}, nil
}
// NewAuthSourcePost response for adding an auth source
func NewAuthSourcePost(ctx *context.Context) {
form := *web.GetForm(ctx).(*forms.AuthenticationForm)
ctx.Data["Title"] = ctx.Tr("admin.auths.new")
ctx.Data["PageIsAdmin"] = true
ctx.Data["PageIsAdminAuthentications"] = true
ctx.Data["CurrentTypeName"] = login.Type(form.Type).String()
ctx.Data["CurrentSecurityProtocol"] = ldap.SecurityProtocolNames[ldap.SecurityProtocol(form.SecurityProtocol)]
ctx.Data["AuthSources"] = authSources
ctx.Data["SecurityProtocols"] = securityProtocols
ctx.Data["SMTPAuths"] = smtp.Authenticators
oauth2providers := oauth2.GetOAuth2Providers()
ctx.Data["OAuth2Providers"] = oauth2providers
ctx.Data["SSPIAutoCreateUsers"] = true
ctx.Data["SSPIAutoActivateUsers"] = true
ctx.Data["SSPIStripDomainNames"] = true
ctx.Data["SSPISeparatorReplacement"] = "_"
ctx.Data["SSPIDefaultLanguage"] = ""
hasTLS := false
var config convert.Conversion
switch login.Type(form.Type) {
case login.LDAP, login.DLDAP:
config = parseLDAPConfig(form)
hasTLS = ldap.SecurityProtocol(form.SecurityProtocol) > ldap.SecurityProtocolUnencrypted
case login.SMTP:
config = parseSMTPConfig(form)
hasTLS = true
case login.PAM:
config = &pamService.Source{
ServiceName: form.PAMServiceName,
EmailDomain: form.PAMEmailDomain,
SkipLocalTwoFA: form.SkipLocalTwoFA,
}
case login.OAuth2:
config = parseOAuth2Config(form)
case login.SSPI:
var err error
config, err = parseSSPIConfig(ctx, form)
if err != nil {
ctx.RenderWithErr(err.Error(), tplAuthNew, form)
return
}
existing, err := login.SourcesByType(login.SSPI)
if err != nil || len(existing) > 0 {
ctx.Data["Err_Type"] = true
ctx.RenderWithErr(ctx.Tr("admin.auths.login_source_of_type_exist"), tplAuthNew, form)
return
}
default:
ctx.Error(http.StatusBadRequest)
return
}
ctx.Data["HasTLS"] = hasTLS
if ctx.HasError() {
ctx.HTML(http.StatusOK, tplAuthNew)
return
}
if err := login.CreateSource(&login.Source{
Type: login.Type(form.Type),
Name: form.Name,
IsActive: form.IsActive,
IsSyncEnabled: form.IsSyncEnabled,
Cfg: config,
}); err != nil {
if login.IsErrSourceAlreadyExist(err) {
ctx.Data["Err_Name"] = true
ctx.RenderWithErr(ctx.Tr("admin.auths.login_source_exist", err.(login.ErrSourceAlreadyExist).Name), tplAuthNew, form)
} else {
ctx.ServerError("login.CreateSource", err)
}
return
}
log.Trace("Authentication created by admin(%s): %s", ctx.User.Name, form.Name)
ctx.Flash.Success(ctx.Tr("admin.auths.new_success", form.Name))
ctx.Redirect(setting.AppSubURL + "/admin/auths")
}
// EditAuthSource render editing auth source page
func EditAuthSource(ctx *context.Context) {
ctx.Data["Title"] = ctx.Tr("admin.auths.edit")
ctx.Data["PageIsAdmin"] = true
ctx.Data["PageIsAdminAuthentications"] = true
ctx.Data["SecurityProtocols"] = securityProtocols
ctx.Data["SMTPAuths"] = smtp.Authenticators
oauth2providers := oauth2.GetOAuth2Providers()
ctx.Data["OAuth2Providers"] = oauth2providers
source, err := login.GetSourceByID(ctx.ParamsInt64(":authid"))
if err != nil {
ctx.ServerError("login.GetSourceByID", err)
return
}
ctx.Data["Source"] = source
ctx.Data["HasTLS"] = source.HasTLS()
if source.IsOAuth2() {
type Named interface {
Name() string
}
for _, provider := range oauth2providers {
if provider.Name() == source.Cfg.(Named).Name() {
ctx.Data["CurrentOAuth2Provider"] = provider
break
}
}
}
ctx.HTML(http.StatusOK, tplAuthEdit)
}
// EditAuthSourcePost response for editing auth source
func EditAuthSourcePost(ctx *context.Context) {
form := *web.GetForm(ctx).(*forms.AuthenticationForm)
ctx.Data["Title"] = ctx.Tr("admin.auths.edit")
ctx.Data["PageIsAdmin"] = true
ctx.Data["PageIsAdminAuthentications"] = true
ctx.Data["SMTPAuths"] = smtp.Authenticators
oauth2providers := oauth2.GetOAuth2Providers()
ctx.Data["OAuth2Providers"] = oauth2providers
source, err := login.GetSourceByID(ctx.ParamsInt64(":authid"))
if err != nil {
ctx.ServerError("login.GetSourceByID", err)
return
}
ctx.Data["Source"] = source
ctx.Data["HasTLS"] = source.HasTLS()
if ctx.HasError() {
ctx.HTML(http.StatusOK, tplAuthEdit)
return
}
var config convert.Conversion
switch login.Type(form.Type) {
case login.LDAP, login.DLDAP:
config = parseLDAPConfig(form)
case login.SMTP:
config = parseSMTPConfig(form)
case login.PAM:
config = &pamService.Source{
ServiceName: form.PAMServiceName,
EmailDomain: form.PAMEmailDomain,
}
case login.OAuth2:
config = parseOAuth2Config(form)
case login.SSPI:
config, err = parseSSPIConfig(ctx, form)
if err != nil {
ctx.RenderWithErr(err.Error(), tplAuthEdit, form)
return
}
default:
ctx.Error(http.StatusBadRequest)
return
}
source.Name = form.Name
source.IsActive = form.IsActive
source.IsSyncEnabled = form.IsSyncEnabled
source.Cfg = config
if err := login.UpdateSource(source); err != nil {
if oauth2.IsErrOpenIDConnectInitialize(err) {
ctx.Flash.Error(err.Error(), true)
ctx.HTML(http.StatusOK, tplAuthEdit)
} else {
ctx.ServerError("UpdateSource", err)
}
return
}
log.Trace("Authentication changed by admin(%s): %d", ctx.User.Name, source.ID)
ctx.Flash.Success(ctx.Tr("admin.auths.update_success"))
ctx.Redirect(setting.AppSubURL + "/admin/auths/" + strconv.FormatInt(form.ID, 10))
}
// DeleteAuthSource response for deleting an auth source
func DeleteAuthSource(ctx *context.Context) {
source, err := login.GetSourceByID(ctx.ParamsInt64(":authid"))
if err != nil {
ctx.ServerError("login.GetSourceByID", err)
return
}
if err = auth_service.DeleteLoginSource(source); err != nil {
if login.IsErrSourceInUse(err) {
ctx.Flash.Error(ctx.Tr("admin.auths.still_in_used"))
} else {
ctx.Flash.Error(fmt.Sprintf("DeleteLoginSource: %v", err))
}
ctx.JSON(http.StatusOK, map[string]interface{}{
"redirect": setting.AppSubURL + "/admin/auths/" + url.PathEscape(ctx.Params(":authid")),
})
return
}
log.Trace("Authentication deleted by admin(%s): %d", ctx.User.Name, source.ID)
ctx.Flash.Success(ctx.Tr("admin.auths.deletion_success"))
ctx.JSON(http.StatusOK, map[string]interface{}{
"redirect": setting.AppSubURL + "/admin/auths",
})
}