cda44750cb
* Attachments: Add extension support, allow all types for releases - Add support for file extensions, matching the `accept` attribute of `<input type="file">` - Add support for type wildcard mime types, e.g. `image/*` - Create repository.release.ALLOWED_TYPES setting (default unrestricted) - Change default for attachment.ALLOWED_TYPES to a list of extensions - Split out POST /attachments into two endpoints for issue/pr and releases to prevent circumvention of allowed types check Fixes: https://github.com/go-gitea/gitea/pull/10172 Fixes: https://github.com/go-gitea/gitea/issues/7266 Fixes: https://github.com/go-gitea/gitea/pull/12460 Ref: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/file#Unique_file_type_specifiers * rename function * extract GET routes out of RepoMustNotBeArchived Co-authored-by: Lauris BH <lauris@nix.lv>
95 lines
3.5 KiB
Go
95 lines
3.5 KiB
Go
// Copyright 2019 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 upload
|
|
|
|
import (
|
|
"net/http"
|
|
"path"
|
|
"regexp"
|
|
"strings"
|
|
|
|
"code.gitea.io/gitea/modules/context"
|
|
"code.gitea.io/gitea/modules/log"
|
|
"code.gitea.io/gitea/modules/setting"
|
|
)
|
|
|
|
// ErrFileTypeForbidden not allowed file type error
|
|
type ErrFileTypeForbidden struct {
|
|
Type string
|
|
}
|
|
|
|
// IsErrFileTypeForbidden checks if an error is a ErrFileTypeForbidden.
|
|
func IsErrFileTypeForbidden(err error) bool {
|
|
_, ok := err.(ErrFileTypeForbidden)
|
|
return ok
|
|
}
|
|
|
|
func (err ErrFileTypeForbidden) Error() string {
|
|
return "This file extension or type is not allowed to be uploaded."
|
|
}
|
|
|
|
var mimeTypeSuffixRe = regexp.MustCompile(`;.*$`)
|
|
var wildcardTypeRe = regexp.MustCompile(`^[a-z]+/\*$`)
|
|
|
|
// Verify validates whether a file is allowed to be uploaded.
|
|
func Verify(buf []byte, fileName string, allowedTypesStr string) error {
|
|
allowedTypesStr = strings.ReplaceAll(allowedTypesStr, "|", ",") // compat for old config format
|
|
|
|
allowedTypes := []string{}
|
|
for _, entry := range strings.Split(allowedTypesStr, ",") {
|
|
entry = strings.ToLower(strings.TrimSpace(entry))
|
|
if entry != "" {
|
|
allowedTypes = append(allowedTypes, entry)
|
|
}
|
|
}
|
|
|
|
if len(allowedTypes) == 0 {
|
|
return nil // everything is allowed
|
|
}
|
|
|
|
fullMimeType := http.DetectContentType(buf)
|
|
mimeType := strings.TrimSpace(mimeTypeSuffixRe.ReplaceAllString(fullMimeType, ""))
|
|
extension := strings.ToLower(path.Ext(fileName))
|
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/file#Unique_file_type_specifiers
|
|
for _, allowEntry := range allowedTypes {
|
|
if allowEntry == "*/*" {
|
|
return nil // everything allowed
|
|
} else if strings.HasPrefix(allowEntry, ".") && allowEntry == extension {
|
|
return nil // extension is allowed
|
|
} else if mimeType == allowEntry {
|
|
return nil // mime type is allowed
|
|
} else if wildcardTypeRe.MatchString(allowEntry) && strings.HasPrefix(mimeType, allowEntry[:len(allowEntry)-1]) {
|
|
return nil // wildcard match, e.g. image/*
|
|
}
|
|
}
|
|
|
|
log.Info("Attachment with type %s blocked from upload", fullMimeType)
|
|
return ErrFileTypeForbidden{Type: fullMimeType}
|
|
}
|
|
|
|
// AddUploadContext renders template values for dropzone
|
|
func AddUploadContext(ctx *context.Context, uploadType string) {
|
|
if uploadType == "release" {
|
|
ctx.Data["UploadUrl"] = ctx.Repo.RepoLink + "/releases/attachments"
|
|
ctx.Data["UploadRemoveUrl"] = ctx.Repo.RepoLink + "/releases/attachments/remove"
|
|
ctx.Data["UploadAccepts"] = strings.Replace(setting.Repository.Release.AllowedTypes, "|", ",", -1)
|
|
ctx.Data["UploadMaxFiles"] = setting.Attachment.MaxFiles
|
|
ctx.Data["UploadMaxSize"] = setting.Attachment.MaxSize
|
|
} else if uploadType == "comment" {
|
|
ctx.Data["UploadUrl"] = ctx.Repo.RepoLink + "/issues/attachments"
|
|
ctx.Data["UploadRemoveUrl"] = ctx.Repo.RepoLink + "/issues/attachments/remove"
|
|
ctx.Data["UploadAccepts"] = strings.Replace(setting.Attachment.AllowedTypes, "|", ",", -1)
|
|
ctx.Data["UploadMaxFiles"] = setting.Attachment.MaxFiles
|
|
ctx.Data["UploadMaxSize"] = setting.Attachment.MaxSize
|
|
} else if uploadType == "repo" {
|
|
ctx.Data["UploadUrl"] = ctx.Repo.RepoLink + "/upload-file"
|
|
ctx.Data["UploadRemoveUrl"] = ctx.Repo.RepoLink + "/upload-remove"
|
|
ctx.Data["UploadAccepts"] = strings.Replace(setting.Repository.Upload.AllowedTypes, "|", ",", -1)
|
|
ctx.Data["UploadMaxFiles"] = setting.Repository.Upload.MaxFiles
|
|
ctx.Data["UploadMaxSize"] = setting.Repository.Upload.FileMaxSize
|
|
}
|
|
}
|