92466129ec
* Improve URL validation for external wiki and external issues * Do not allow also localhost address for external URLs
77 lines
1.7 KiB
Go
77 lines
1.7 KiB
Go
// Copyright 2018 The Gitea 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 validation
|
|
|
|
import (
|
|
"net"
|
|
"net/url"
|
|
"strings"
|
|
|
|
"code.gitea.io/gitea/modules/setting"
|
|
)
|
|
|
|
var loopbackIPBlocks []*net.IPNet
|
|
|
|
func init() {
|
|
for _, cidr := range []string{
|
|
"127.0.0.0/8", // IPv4 loopback
|
|
"::1/128", // IPv6 loopback
|
|
} {
|
|
if _, block, err := net.ParseCIDR(cidr); err == nil {
|
|
loopbackIPBlocks = append(loopbackIPBlocks, block)
|
|
}
|
|
}
|
|
}
|
|
|
|
func isLoopbackIP(ip string) bool {
|
|
pip := net.ParseIP(ip)
|
|
if pip == nil {
|
|
return false
|
|
}
|
|
for _, block := range loopbackIPBlocks {
|
|
if block.Contains(pip) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// IsValidURL checks if URL is valid
|
|
func IsValidURL(uri string) bool {
|
|
if u, err := url.ParseRequestURI(uri); err != nil ||
|
|
(u.Scheme != "http" && u.Scheme != "https") ||
|
|
!validPort(portOnly(u.Host)) {
|
|
return false
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
// IsAPIURL checks if URL is current Gitea instance API URL
|
|
func IsAPIURL(uri string) bool {
|
|
return strings.HasPrefix(strings.ToLower(uri), strings.ToLower(setting.AppURL+"api"))
|
|
}
|
|
|
|
// IsValidExternalURL checks if URL is valid external URL
|
|
func IsValidExternalURL(uri string) bool {
|
|
if !IsValidURL(uri) || IsAPIURL(uri) {
|
|
return false
|
|
}
|
|
|
|
u, err := url.ParseRequestURI(uri)
|
|
if err != nil {
|
|
return false
|
|
}
|
|
|
|
// Currently check only if not loopback IP is provided to keep compatibility
|
|
if isLoopbackIP(u.Hostname()) || strings.ToLower(u.Hostname()) == "localhost" {
|
|
return false
|
|
}
|
|
|
|
// TODO: Later it should be added to allow local network IP addreses
|
|
// only if allowed by special setting
|
|
|
|
return true
|
|
}
|