mirror of
https://github.com/go-gitea/gitea.git
synced 2024-08-28 22:14:20 -04:00
* Add configurable Trust Models Gitea's default signature verification model differs from GitHub. GitHub uses signatures to verify that the committer is who they say they are - meaning that when GitHub makes a signed commit it must be the committer. The GitHub model prevents re-publishing of commits after revocation of a key and prevents re-signing of other people's commits to create a completely trusted repository signed by one key or a set of trusted keys. The default behaviour of Gitea in contrast is to always display the avatar and information related to a signature. This allows signatures to be decoupled from the committer. That being said, allowing arbitary users to present other peoples commits as theirs is not necessarily desired therefore we have a trust model whereby signatures from collaborators are marked trusted, signatures matching the commit line are marked untrusted and signatures that match a user in the db but not the committer line are marked unmatched. The problem with this model is that this conflicts with Github therefore we need to provide an option to allow users to choose the Github model should they wish to. Signed-off-by: Andrew Thornton <art27@cantab.net> * Adjust locale strings Signed-off-by: Andrew Thornton <art27@cantab.net> * as per @6543 Co-authored-by: 6543 <6543@obermui.de> * Update models/gpg_key.go * Add migration for repository Signed-off-by: Andrew Thornton <art27@cantab.net> Co-authored-by: 6543 <6543@obermui.de> Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
466 lines
13 KiB
Go
466 lines
13 KiB
Go
// Copyright 2019 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package repofiles
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import (
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"bytes"
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"fmt"
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"path"
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"strings"
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"time"
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"code.gitea.io/gitea/models"
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"code.gitea.io/gitea/modules/charset"
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"code.gitea.io/gitea/modules/git"
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"code.gitea.io/gitea/modules/lfs"
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"code.gitea.io/gitea/modules/log"
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repo_module "code.gitea.io/gitea/modules/repository"
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"code.gitea.io/gitea/modules/setting"
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"code.gitea.io/gitea/modules/storage"
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"code.gitea.io/gitea/modules/structs"
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stdcharset "golang.org/x/net/html/charset"
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"golang.org/x/text/transform"
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)
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// IdentityOptions for a person's identity like an author or committer
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type IdentityOptions struct {
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Name string
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Email string
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}
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// CommitDateOptions store dates for GIT_AUTHOR_DATE and GIT_COMMITTER_DATE
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type CommitDateOptions struct {
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Author time.Time
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Committer time.Time
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}
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// UpdateRepoFileOptions holds the repository file update options
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type UpdateRepoFileOptions struct {
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LastCommitID string
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OldBranch string
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NewBranch string
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TreePath string
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FromTreePath string
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Message string
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Content string
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SHA string
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IsNewFile bool
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Author *IdentityOptions
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Committer *IdentityOptions
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Dates *CommitDateOptions
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}
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func detectEncodingAndBOM(entry *git.TreeEntry, repo *models.Repository) (string, bool) {
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reader, err := entry.Blob().DataAsync()
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if err != nil {
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// return default
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return "UTF-8", false
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}
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defer reader.Close()
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buf := make([]byte, 1024)
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n, err := reader.Read(buf)
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if err != nil {
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// return default
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return "UTF-8", false
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}
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buf = buf[:n]
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if setting.LFS.StartServer {
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meta := lfs.IsPointerFile(&buf)
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if meta != nil {
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meta, err = repo.GetLFSMetaObjectByOid(meta.Oid)
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if err != nil && err != models.ErrLFSObjectNotExist {
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// return default
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return "UTF-8", false
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}
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}
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if meta != nil {
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dataRc, err := lfs.ReadMetaObject(meta)
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if err != nil {
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// return default
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return "UTF-8", false
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}
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defer dataRc.Close()
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buf = make([]byte, 1024)
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n, err = dataRc.Read(buf)
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if err != nil {
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// return default
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return "UTF-8", false
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}
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buf = buf[:n]
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}
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}
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encoding, err := charset.DetectEncoding(buf)
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if err != nil {
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// just default to utf-8 and no bom
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return "UTF-8", false
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}
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if encoding == "UTF-8" {
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return encoding, bytes.Equal(buf[0:3], charset.UTF8BOM)
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}
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charsetEncoding, _ := stdcharset.Lookup(encoding)
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if charsetEncoding == nil {
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return "UTF-8", false
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}
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result, n, err := transform.String(charsetEncoding.NewDecoder(), string(buf))
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if err != nil {
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// return default
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return "UTF-8", false
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}
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if n > 2 {
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return encoding, bytes.Equal([]byte(result)[0:3], charset.UTF8BOM)
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}
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return encoding, false
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}
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// CreateOrUpdateRepoFile adds or updates a file in the given repository
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func CreateOrUpdateRepoFile(repo *models.Repository, doer *models.User, opts *UpdateRepoFileOptions) (*structs.FileResponse, error) {
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// If no branch name is set, assume master
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if opts.OldBranch == "" {
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opts.OldBranch = repo.DefaultBranch
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}
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if opts.NewBranch == "" {
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opts.NewBranch = opts.OldBranch
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}
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// oldBranch must exist for this operation
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if _, err := repo_module.GetBranch(repo, opts.OldBranch); err != nil {
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return nil, err
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}
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// A NewBranch can be specified for the file to be created/updated in a new branch.
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// Check to make sure the branch does not already exist, otherwise we can't proceed.
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// If we aren't branching to a new branch, make sure user can commit to the given branch
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if opts.NewBranch != opts.OldBranch {
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existingBranch, err := repo_module.GetBranch(repo, opts.NewBranch)
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if existingBranch != nil {
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return nil, models.ErrBranchAlreadyExists{
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BranchName: opts.NewBranch,
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}
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}
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if err != nil && !git.IsErrBranchNotExist(err) {
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return nil, err
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}
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} else {
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protectedBranch, err := repo.GetBranchProtection(opts.OldBranch)
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if err != nil {
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return nil, err
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}
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if protectedBranch != nil {
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if !protectedBranch.CanUserPush(doer.ID) {
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return nil, models.ErrUserCannotCommit{
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UserName: doer.LowerName,
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}
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}
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if protectedBranch.RequireSignedCommits {
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_, _, _, err := repo.SignCRUDAction(doer, repo.RepoPath(), opts.OldBranch)
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if err != nil {
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if !models.IsErrWontSign(err) {
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return nil, err
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}
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return nil, models.ErrUserCannotCommit{
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UserName: doer.LowerName,
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}
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}
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}
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patterns := protectedBranch.GetProtectedFilePatterns()
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for _, pat := range patterns {
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if pat.Match(strings.ToLower(opts.TreePath)) {
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return nil, models.ErrFilePathProtected{
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Path: opts.TreePath,
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}
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}
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}
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}
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}
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// If FromTreePath is not set, set it to the opts.TreePath
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if opts.TreePath != "" && opts.FromTreePath == "" {
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opts.FromTreePath = opts.TreePath
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}
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// Check that the path given in opts.treePath is valid (not a git path)
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treePath := CleanUploadFileName(opts.TreePath)
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if treePath == "" {
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return nil, models.ErrFilenameInvalid{
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Path: opts.TreePath,
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}
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}
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// If there is a fromTreePath (we are copying it), also clean it up
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fromTreePath := CleanUploadFileName(opts.FromTreePath)
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if fromTreePath == "" && opts.FromTreePath != "" {
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return nil, models.ErrFilenameInvalid{
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Path: opts.FromTreePath,
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}
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}
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message := strings.TrimSpace(opts.Message)
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author, committer := GetAuthorAndCommitterUsers(opts.Author, opts.Committer, doer)
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t, err := NewTemporaryUploadRepository(repo)
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if err != nil {
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log.Error("%v", err)
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}
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defer t.Close()
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if err := t.Clone(opts.OldBranch); err != nil {
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return nil, err
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}
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if err := t.SetDefaultIndex(); err != nil {
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return nil, err
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}
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// Get the commit of the original branch
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commit, err := t.GetBranchCommit(opts.OldBranch)
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if err != nil {
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return nil, err // Couldn't get a commit for the branch
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}
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// Assigned LastCommitID in opts if it hasn't been set
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if opts.LastCommitID == "" {
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opts.LastCommitID = commit.ID.String()
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} else {
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lastCommitID, err := t.gitRepo.ConvertToSHA1(opts.LastCommitID)
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if err != nil {
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return nil, fmt.Errorf("DeleteRepoFile: Invalid last commit ID: %v", err)
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}
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opts.LastCommitID = lastCommitID.String()
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}
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encoding := "UTF-8"
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bom := false
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executable := false
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if !opts.IsNewFile {
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fromEntry, err := commit.GetTreeEntryByPath(fromTreePath)
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if err != nil {
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return nil, err
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}
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if opts.SHA != "" {
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// If a SHA was given and the SHA given doesn't match the SHA of the fromTreePath, throw error
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if opts.SHA != fromEntry.ID.String() {
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return nil, models.ErrSHADoesNotMatch{
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Path: treePath,
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GivenSHA: opts.SHA,
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CurrentSHA: fromEntry.ID.String(),
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}
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}
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} else if opts.LastCommitID != "" {
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// If a lastCommitID was given and it doesn't match the commitID of the head of the branch throw
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// an error, but only if we aren't creating a new branch.
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if commit.ID.String() != opts.LastCommitID && opts.OldBranch == opts.NewBranch {
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if changed, err := commit.FileChangedSinceCommit(treePath, opts.LastCommitID); err != nil {
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return nil, err
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} else if changed {
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return nil, models.ErrCommitIDDoesNotMatch{
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GivenCommitID: opts.LastCommitID,
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CurrentCommitID: opts.LastCommitID,
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}
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}
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// The file wasn't modified, so we are good to delete it
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}
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} else {
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// When updating a file, a lastCommitID or SHA needs to be given to make sure other commits
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// haven't been made. We throw an error if one wasn't provided.
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return nil, models.ErrSHAOrCommitIDNotProvided{}
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}
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encoding, bom = detectEncodingAndBOM(fromEntry, repo)
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executable = fromEntry.IsExecutable()
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}
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// For the path where this file will be created/updated, we need to make
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// sure no parts of the path are existing files or links except for the last
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// item in the path which is the file name, and that shouldn't exist IF it is
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// a new file OR is being moved to a new path.
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treePathParts := strings.Split(treePath, "/")
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subTreePath := ""
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for index, part := range treePathParts {
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subTreePath = path.Join(subTreePath, part)
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entry, err := commit.GetTreeEntryByPath(subTreePath)
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if err != nil {
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if git.IsErrNotExist(err) {
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// Means there is no item with that name, so we're good
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break
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}
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return nil, err
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}
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if index < len(treePathParts)-1 {
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if !entry.IsDir() {
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return nil, models.ErrFilePathInvalid{
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Message: fmt.Sprintf("a file exists where you’re trying to create a subdirectory [path: %s]", subTreePath),
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Path: subTreePath,
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Name: part,
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Type: git.EntryModeBlob,
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}
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}
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} else if entry.IsLink() {
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return nil, models.ErrFilePathInvalid{
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Message: fmt.Sprintf("a symbolic link exists where you’re trying to create a subdirectory [path: %s]", subTreePath),
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Path: subTreePath,
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Name: part,
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Type: git.EntryModeSymlink,
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}
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} else if entry.IsDir() {
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return nil, models.ErrFilePathInvalid{
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Message: fmt.Sprintf("a directory exists where you’re trying to create a file [path: %s]", subTreePath),
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Path: subTreePath,
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Name: part,
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Type: git.EntryModeTree,
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}
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} else if fromTreePath != treePath || opts.IsNewFile {
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// The entry shouldn't exist if we are creating new file or moving to a new path
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return nil, models.ErrRepoFileAlreadyExists{
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Path: treePath,
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}
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}
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}
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// Get the two paths (might be the same if not moving) from the index if they exist
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filesInIndex, err := t.LsFiles(opts.TreePath, opts.FromTreePath)
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if err != nil {
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return nil, fmt.Errorf("UpdateRepoFile: %v", err)
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}
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// If is a new file (not updating) then the given path shouldn't exist
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if opts.IsNewFile {
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for _, file := range filesInIndex {
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if file == opts.TreePath {
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return nil, models.ErrRepoFileAlreadyExists{
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Path: opts.TreePath,
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}
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}
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}
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}
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// Remove the old path from the tree
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if fromTreePath != treePath && len(filesInIndex) > 0 {
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for _, file := range filesInIndex {
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if file == fromTreePath {
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if err := t.RemoveFilesFromIndex(opts.FromTreePath); err != nil {
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return nil, err
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}
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}
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}
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}
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content := opts.Content
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if bom {
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content = string(charset.UTF8BOM) + content
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}
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if encoding != "UTF-8" {
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charsetEncoding, _ := stdcharset.Lookup(encoding)
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if charsetEncoding != nil {
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result, _, err := transform.String(charsetEncoding.NewEncoder(), content)
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if err != nil {
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// Look if we can't encode back in to the original we should just stick with utf-8
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log.Error("Error re-encoding %s (%s) as %s - will stay as UTF-8: %v", opts.TreePath, opts.FromTreePath, encoding, err)
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result = content
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}
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content = result
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} else {
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log.Error("Unknown encoding: %s", encoding)
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}
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}
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// Reset the opts.Content to our adjusted content to ensure that LFS gets the correct content
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opts.Content = content
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var lfsMetaObject *models.LFSMetaObject
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if setting.LFS.StartServer {
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// Check there is no way this can return multiple infos
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filename2attribute2info, err := t.CheckAttribute("filter", treePath)
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if err != nil {
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return nil, err
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}
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if filename2attribute2info[treePath] != nil && filename2attribute2info[treePath]["filter"] == "lfs" {
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// OK so we are supposed to LFS this data!
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oid, err := models.GenerateLFSOid(strings.NewReader(opts.Content))
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if err != nil {
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return nil, err
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}
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lfsMetaObject = &models.LFSMetaObject{Oid: oid, Size: int64(len(opts.Content)), RepositoryID: repo.ID}
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content = lfsMetaObject.Pointer()
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}
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}
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// Add the object to the database
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objectHash, err := t.HashObject(strings.NewReader(content))
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if err != nil {
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return nil, err
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}
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// Add the object to the index
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if executable {
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if err := t.AddObjectToIndex("100755", objectHash, treePath); err != nil {
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return nil, err
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}
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} else {
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if err := t.AddObjectToIndex("100644", objectHash, treePath); err != nil {
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return nil, err
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}
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}
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// Now write the tree
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treeHash, err := t.WriteTree()
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if err != nil {
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return nil, err
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}
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// Now commit the tree
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var commitHash string
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if opts.Dates != nil {
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commitHash, err = t.CommitTreeWithDate(author, committer, treeHash, message, opts.Dates.Author, opts.Dates.Committer)
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} else {
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commitHash, err = t.CommitTree(author, committer, treeHash, message)
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}
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if err != nil {
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return nil, err
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}
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if lfsMetaObject != nil {
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// We have an LFS object - create it
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lfsMetaObject, err = models.NewLFSMetaObject(lfsMetaObject)
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if err != nil {
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return nil, err
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}
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contentStore := &lfs.ContentStore{ObjectStorage: storage.LFS}
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exist, err := contentStore.Exists(lfsMetaObject)
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if err != nil {
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return nil, err
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}
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if !exist {
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if err := contentStore.Put(lfsMetaObject, strings.NewReader(opts.Content)); err != nil {
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if _, err2 := repo.RemoveLFSMetaObjectByOid(lfsMetaObject.Oid); err2 != nil {
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return nil, fmt.Errorf("Error whilst removing failed inserted LFS object %s: %v (Prev Error: %v)", lfsMetaObject.Oid, err2, err)
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}
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return nil, err
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}
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}
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}
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// Then push this tree to NewBranch
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if err := t.Push(doer, commitHash, opts.NewBranch); err != nil {
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log.Error("%T %v", err, err)
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return nil, err
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}
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commit, err = t.GetCommit(commitHash)
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if err != nil {
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return nil, err
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}
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file, err := GetFileResponseFromCommit(repo, commit, opts.NewBranch, treePath)
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if err != nil {
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return nil, err
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}
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return file, nil
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}
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