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gitea/modules/validation/binding.go

201 lines
5.1 KiB
Go

// Copyright 2017 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 (
"fmt"
"regexp"
"strings"
"gitea.com/go-chi/binding"
"github.com/gobwas/glob"
)
const (
// ErrGitRefName is git reference name error
ErrGitRefName = "GitRefNameError"
// ErrGlobPattern is returned when glob pattern is invalid
ErrGlobPattern = "GlobPattern"
// ErrRegexPattern is returned when a regex pattern is invalid
ErrRegexPattern = "RegexPattern"
)
// GitRefNamePatternInvalid is regular expression with unallowed characters in git reference name
// They cannot have ASCII control characters (i.e. bytes whose values are lower than \040, or \177 DEL), space, tilde ~, caret ^, or colon : anywhere.
// They cannot have question-mark ?, asterisk *, or open bracket [ anywhere
var GitRefNamePatternInvalid = regexp.MustCompile(`[\000-\037\177 \\~^:?*[]+`)
// CheckGitRefAdditionalRulesValid check name is valid on additional rules
func CheckGitRefAdditionalRulesValid(name string) bool {
// Additional rules as described at https://www.kernel.org/pub/software/scm/git/docs/git-check-ref-format.html
if strings.HasPrefix(name, "/") || strings.HasSuffix(name, "/") ||
strings.HasSuffix(name, ".") || strings.Contains(name, "..") ||
strings.Contains(name, "//") || strings.Contains(name, "@{") ||
name == "@" {
return false
}
parts := strings.Split(name, "/")
for _, part := range parts {
if strings.HasSuffix(part, ".lock") || strings.HasPrefix(part, ".") {
return false
}
}
return true
}
// AddBindingRules adds additional binding rules
func AddBindingRules() {
addGitRefNameBindingRule()
addValidURLBindingRule()
addValidSiteURLBindingRule()
addGlobPatternRule()
addRegexPatternRule()
addGlobOrRegexPatternRule()
}
func addGitRefNameBindingRule() {
// Git refname validation rule
binding.AddRule(&binding.Rule{
IsMatch: func(rule string) bool {
return strings.HasPrefix(rule, "GitRefName")
},
IsValid: func(errs binding.Errors, name string, val interface{}) (bool, binding.Errors) {
str := fmt.Sprintf("%v", val)
if GitRefNamePatternInvalid.MatchString(str) {
errs.Add([]string{name}, ErrGitRefName, "GitRefName")
return false, errs
}
if !CheckGitRefAdditionalRulesValid(str) {
errs.Add([]string{name}, ErrGitRefName, "GitRefName")
return false, errs
}
return true, errs
},
})
}
func addValidURLBindingRule() {
// URL validation rule
binding.AddRule(&binding.Rule{
IsMatch: func(rule string) bool {
return strings.HasPrefix(rule, "ValidUrl")
},
IsValid: func(errs binding.Errors, name string, val interface{}) (bool, binding.Errors) {
str := fmt.Sprintf("%v", val)
if len(str) != 0 && !IsValidURL(str) {
errs.Add([]string{name}, binding.ERR_URL, "Url")
return false, errs
}
return true, errs
},
})
}
func addValidSiteURLBindingRule() {
// URL validation rule
binding.AddRule(&binding.Rule{
IsMatch: func(rule string) bool {
return strings.HasPrefix(rule, "ValidSiteUrl")
},
IsValid: func(errs binding.Errors, name string, val interface{}) (bool, binding.Errors) {
str := fmt.Sprintf("%v", val)
if len(str) != 0 && !IsValidSiteURL(str) {
errs.Add([]string{name}, binding.ERR_URL, "Url")
return false, errs
}
return true, errs
},
})
}
func addGlobPatternRule() {
binding.AddRule(&binding.Rule{
IsMatch: func(rule string) bool {
return rule == "GlobPattern"
},
IsValid: globPatternValidator,
})
}
func globPatternValidator(errs binding.Errors, name string, val interface{}) (bool, binding.Errors) {
str := fmt.Sprintf("%v", val)
if len(str) != 0 {
if _, err := glob.Compile(str); err != nil {
errs.Add([]string{name}, ErrGlobPattern, err.Error())
return false, errs
}
}
return true, errs
}
func addRegexPatternRule() {
binding.AddRule(&binding.Rule{
IsMatch: func(rule string) bool {
return rule == "RegexPattern"
},
IsValid: regexPatternValidator,
})
}
func regexPatternValidator(errs binding.Errors, name string, val interface{}) (bool, binding.Errors) {
str := fmt.Sprintf("%v", val)
if _, err := regexp.Compile(str); err != nil {
errs.Add([]string{name}, ErrRegexPattern, err.Error())
return false, errs
}
return true, errs
}
func addGlobOrRegexPatternRule() {
binding.AddRule(&binding.Rule{
IsMatch: func(rule string) bool {
return rule == "GlobOrRegexPattern"
},
IsValid: func(errs binding.Errors, name string, val interface{}) (bool, binding.Errors) {
str := strings.TrimSpace(fmt.Sprintf("%v", val))
if len(str) >= 2 && strings.HasPrefix(str, "/") && strings.HasSuffix(str, "/") {
return regexPatternValidator(errs, name, str[1:len(str)-1])
}
return globPatternValidator(errs, name, val)
},
})
}
func portOnly(hostport string) string {
colon := strings.IndexByte(hostport, ':')
if colon == -1 {
return ""
}
if i := strings.Index(hostport, "]:"); i != -1 {
return hostport[i+len("]:"):]
}
if strings.Contains(hostport, "]") {
return ""
}
return hostport[colon+len(":"):]
}
func validPort(p string) bool {
for _, r := range []byte(p) {
if r < '0' || r > '9' {
return false
}
}
return true
}