You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
495 lines
16 KiB
495 lines
16 KiB
// 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 private includes all internal routes. The package name internal is ideal but Golang is not allowed, so we use private as package name instead.
|
|
package private
|
|
|
|
import (
|
|
"fmt"
|
|
"net/http"
|
|
"os"
|
|
"strings"
|
|
|
|
"code.gitea.io/gitea/models"
|
|
asymkey_model "code.gitea.io/gitea/models/asymkey"
|
|
perm_model "code.gitea.io/gitea/models/perm"
|
|
"code.gitea.io/gitea/models/unit"
|
|
user_model "code.gitea.io/gitea/models/user"
|
|
gitea_context "code.gitea.io/gitea/modules/context"
|
|
"code.gitea.io/gitea/modules/git"
|
|
"code.gitea.io/gitea/modules/log"
|
|
"code.gitea.io/gitea/modules/private"
|
|
"code.gitea.io/gitea/modules/web"
|
|
pull_service "code.gitea.io/gitea/services/pull"
|
|
)
|
|
|
|
type preReceiveContext struct {
|
|
*gitea_context.PrivateContext
|
|
|
|
// loadedPusher indicates that where the following information are loaded
|
|
loadedPusher bool
|
|
user *user_model.User // it's the org user if a DeployKey is used
|
|
userPerm models.Permission
|
|
deployKeyAccessMode perm_model.AccessMode
|
|
|
|
canCreatePullRequest bool
|
|
checkedCanCreatePullRequest bool
|
|
|
|
canWriteCode bool
|
|
checkedCanWriteCode bool
|
|
|
|
protectedTags []*models.ProtectedTag
|
|
gotProtectedTags bool
|
|
|
|
env []string
|
|
|
|
opts *private.HookOptions
|
|
}
|
|
|
|
// CanWriteCode returns true if pusher can write code
|
|
func (ctx *preReceiveContext) CanWriteCode() bool {
|
|
if !ctx.checkedCanWriteCode {
|
|
if !ctx.loadPusherAndPermission() {
|
|
return false
|
|
}
|
|
ctx.canWriteCode = ctx.userPerm.CanWrite(unit.TypeCode) || ctx.deployKeyAccessMode >= perm_model.AccessModeWrite
|
|
ctx.checkedCanWriteCode = true
|
|
}
|
|
return ctx.canWriteCode
|
|
}
|
|
|
|
// AssertCanWriteCode returns true if pusher can write code
|
|
func (ctx *preReceiveContext) AssertCanWriteCode() bool {
|
|
if !ctx.CanWriteCode() {
|
|
if ctx.Written() {
|
|
return false
|
|
}
|
|
ctx.JSON(http.StatusForbidden, map[string]interface{}{
|
|
"err": "User permission denied for writing.",
|
|
})
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
// CanCreatePullRequest returns true if pusher can create pull requests
|
|
func (ctx *preReceiveContext) CanCreatePullRequest() bool {
|
|
if !ctx.checkedCanCreatePullRequest {
|
|
if !ctx.loadPusherAndPermission() {
|
|
return false
|
|
}
|
|
ctx.canCreatePullRequest = ctx.userPerm.CanRead(unit.TypePullRequests)
|
|
ctx.checkedCanCreatePullRequest = true
|
|
}
|
|
return ctx.canCreatePullRequest
|
|
}
|
|
|
|
// AssertCreatePullRequest returns true if can create pull requests
|
|
func (ctx *preReceiveContext) AssertCreatePullRequest() bool {
|
|
if !ctx.CanCreatePullRequest() {
|
|
if ctx.Written() {
|
|
return false
|
|
}
|
|
ctx.JSON(http.StatusForbidden, map[string]interface{}{
|
|
"err": "User permission denied for creating pull-request.",
|
|
})
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
// HookPreReceive checks whether a individual commit is acceptable
|
|
func HookPreReceive(ctx *gitea_context.PrivateContext) {
|
|
opts := web.GetForm(ctx).(*private.HookOptions)
|
|
|
|
ourCtx := &preReceiveContext{
|
|
PrivateContext: ctx,
|
|
env: generateGitEnv(opts), // Generate git environment for checking commits
|
|
opts: opts,
|
|
}
|
|
|
|
// Iterate across the provided old commit IDs
|
|
for i := range opts.OldCommitIDs {
|
|
oldCommitID := opts.OldCommitIDs[i]
|
|
newCommitID := opts.NewCommitIDs[i]
|
|
refFullName := opts.RefFullNames[i]
|
|
|
|
switch {
|
|
case strings.HasPrefix(refFullName, git.BranchPrefix):
|
|
preReceiveBranch(ourCtx, oldCommitID, newCommitID, refFullName)
|
|
case strings.HasPrefix(refFullName, git.TagPrefix):
|
|
preReceiveTag(ourCtx, oldCommitID, newCommitID, refFullName)
|
|
case git.SupportProcReceive && strings.HasPrefix(refFullName, git.PullRequestPrefix):
|
|
preReceivePullRequest(ourCtx, oldCommitID, newCommitID, refFullName)
|
|
default:
|
|
ourCtx.AssertCanWriteCode()
|
|
}
|
|
if ctx.Written() {
|
|
return
|
|
}
|
|
}
|
|
|
|
ctx.PlainText(http.StatusOK, "ok")
|
|
}
|
|
|
|
func preReceiveBranch(ctx *preReceiveContext, oldCommitID, newCommitID, refFullName string) {
|
|
if !ctx.AssertCanWriteCode() {
|
|
return
|
|
}
|
|
|
|
repo := ctx.Repo.Repository
|
|
gitRepo := ctx.Repo.GitRepo
|
|
branchName := strings.TrimPrefix(refFullName, git.BranchPrefix)
|
|
|
|
if branchName == repo.DefaultBranch && newCommitID == git.EmptySHA {
|
|
log.Warn("Forbidden: Branch: %s is the default branch in %-v and cannot be deleted", branchName, repo)
|
|
ctx.JSON(http.StatusForbidden, private.Response{
|
|
Err: fmt.Sprintf("branch %s is the default branch and cannot be deleted", branchName),
|
|
})
|
|
return
|
|
}
|
|
|
|
protectBranch, err := models.GetProtectedBranchBy(repo.ID, branchName)
|
|
if err != nil {
|
|
log.Error("Unable to get protected branch: %s in %-v Error: %v", branchName, repo, err)
|
|
ctx.JSON(http.StatusInternalServerError, private.Response{
|
|
Err: err.Error(),
|
|
})
|
|
return
|
|
}
|
|
|
|
// Allow pushes to non-protected branches
|
|
if protectBranch == nil || !protectBranch.IsProtected() {
|
|
return
|
|
}
|
|
|
|
// This ref is a protected branch.
|
|
//
|
|
// First of all we need to enforce absolutely:
|
|
//
|
|
// 1. Detect and prevent deletion of the branch
|
|
if newCommitID == git.EmptySHA {
|
|
log.Warn("Forbidden: Branch: %s in %-v is protected from deletion", branchName, repo)
|
|
ctx.JSON(http.StatusForbidden, private.Response{
|
|
Err: fmt.Sprintf("branch %s is protected from deletion", branchName),
|
|
})
|
|
return
|
|
}
|
|
|
|
// 2. Disallow force pushes to protected branches
|
|
if git.EmptySHA != oldCommitID {
|
|
output, err := git.NewCommand(ctx, "rev-list", "--max-count=1", oldCommitID, "^"+newCommitID).RunInDirWithEnv(repo.RepoPath(), ctx.env)
|
|
if err != nil {
|
|
log.Error("Unable to detect force push between: %s and %s in %-v Error: %v", oldCommitID, newCommitID, repo, err)
|
|
ctx.JSON(http.StatusInternalServerError, private.Response{
|
|
Err: fmt.Sprintf("Fail to detect force push: %v", err),
|
|
})
|
|
return
|
|
} else if len(output) > 0 {
|
|
log.Warn("Forbidden: Branch: %s in %-v is protected from force push", branchName, repo)
|
|
ctx.JSON(http.StatusForbidden, private.Response{
|
|
Err: fmt.Sprintf("branch %s is protected from force push", branchName),
|
|
})
|
|
return
|
|
|
|
}
|
|
}
|
|
|
|
// 3. Enforce require signed commits
|
|
if protectBranch.RequireSignedCommits {
|
|
err := verifyCommits(oldCommitID, newCommitID, gitRepo, ctx.env)
|
|
if err != nil {
|
|
if !isErrUnverifiedCommit(err) {
|
|
log.Error("Unable to check commits from %s to %s in %-v: %v", oldCommitID, newCommitID, repo, err)
|
|
ctx.JSON(http.StatusInternalServerError, private.Response{
|
|
Err: fmt.Sprintf("Unable to check commits from %s to %s: %v", oldCommitID, newCommitID, err),
|
|
})
|
|
return
|
|
}
|
|
unverifiedCommit := err.(*errUnverifiedCommit).sha
|
|
log.Warn("Forbidden: Branch: %s in %-v is protected from unverified commit %s", branchName, repo, unverifiedCommit)
|
|
ctx.JSON(http.StatusForbidden, private.Response{
|
|
Err: fmt.Sprintf("branch %s is protected from unverified commit %s", branchName, unverifiedCommit),
|
|
})
|
|
return
|
|
}
|
|
}
|
|
|
|
// Now there are several tests which can be overridden:
|
|
//
|
|
// 4. Check protected file patterns - this is overridable from the UI
|
|
changedProtectedfiles := false
|
|
protectedFilePath := ""
|
|
|
|
globs := protectBranch.GetProtectedFilePatterns()
|
|
if len(globs) > 0 {
|
|
_, err := pull_service.CheckFileProtection(gitRepo, oldCommitID, newCommitID, globs, 1, ctx.env)
|
|
if err != nil {
|
|
if !models.IsErrFilePathProtected(err) {
|
|
log.Error("Unable to check file protection for commits from %s to %s in %-v: %v", oldCommitID, newCommitID, repo, err)
|
|
ctx.JSON(http.StatusInternalServerError, private.Response{
|
|
Err: fmt.Sprintf("Unable to check file protection for commits from %s to %s: %v", oldCommitID, newCommitID, err),
|
|
})
|
|
return
|
|
|
|
}
|
|
|
|
changedProtectedfiles = true
|
|
protectedFilePath = err.(models.ErrFilePathProtected).Path
|
|
}
|
|
}
|
|
|
|
// 5. Check if the doer is allowed to push
|
|
canPush := false
|
|
if ctx.opts.DeployKeyID != 0 {
|
|
canPush = !changedProtectedfiles && protectBranch.CanPush && (!protectBranch.EnableWhitelist || protectBranch.WhitelistDeployKeys)
|
|
} else {
|
|
canPush = !changedProtectedfiles && protectBranch.CanUserPush(ctx.opts.UserID)
|
|
}
|
|
|
|
// 6. If we're not allowed to push directly
|
|
if !canPush {
|
|
// Is this is a merge from the UI/API?
|
|
if ctx.opts.PullRequestID == 0 {
|
|
// 6a. If we're not merging from the UI/API then there are two ways we got here:
|
|
//
|
|
// We are changing a protected file and we're not allowed to do that
|
|
if changedProtectedfiles {
|
|
log.Warn("Forbidden: Branch: %s in %-v is protected from changing file %s", branchName, repo, protectedFilePath)
|
|
ctx.JSON(http.StatusForbidden, private.Response{
|
|
Err: fmt.Sprintf("branch %s is protected from changing file %s", branchName, protectedFilePath),
|
|
})
|
|
return
|
|
}
|
|
|
|
// Allow commits that only touch unprotected files
|
|
globs := protectBranch.GetUnprotectedFilePatterns()
|
|
if len(globs) > 0 {
|
|
unprotectedFilesOnly, err := pull_service.CheckUnprotectedFiles(gitRepo, oldCommitID, newCommitID, globs, ctx.env)
|
|
if err != nil {
|
|
log.Error("Unable to check file protection for commits from %s to %s in %-v: %v", oldCommitID, newCommitID, repo, err)
|
|
ctx.JSON(http.StatusInternalServerError, private.Response{
|
|
Err: fmt.Sprintf("Unable to check file protection for commits from %s to %s: %v", oldCommitID, newCommitID, err),
|
|
})
|
|
return
|
|
}
|
|
if unprotectedFilesOnly {
|
|
// Commit only touches unprotected files, this is allowed
|
|
return
|
|
}
|
|
}
|
|
|
|
// Or we're simply not able to push to this protected branch
|
|
log.Warn("Forbidden: User %d is not allowed to push to protected branch: %s in %-v", ctx.opts.UserID, branchName, repo)
|
|
ctx.JSON(http.StatusForbidden, private.Response{
|
|
Err: fmt.Sprintf("Not allowed to push to protected branch %s", branchName),
|
|
})
|
|
return
|
|
}
|
|
// 6b. Merge (from UI or API)
|
|
|
|
// Get the PR, user and permissions for the user in the repository
|
|
pr, err := models.GetPullRequestByID(ctx.opts.PullRequestID)
|
|
if err != nil {
|
|
log.Error("Unable to get PullRequest %d Error: %v", ctx.opts.PullRequestID, err)
|
|
ctx.JSON(http.StatusInternalServerError, private.Response{
|
|
Err: fmt.Sprintf("Unable to get PullRequest %d Error: %v", ctx.opts.PullRequestID, err),
|
|
})
|
|
return
|
|
}
|
|
|
|
// although we should have called `loadPusherAndPermission` before, here we call it explicitly again because we need to access ctx.user below
|
|
if !ctx.loadPusherAndPermission() {
|
|
// if error occurs, loadPusherAndPermission had written the error response
|
|
return
|
|
}
|
|
|
|
// Now check if the user is allowed to merge PRs for this repository
|
|
// Note: we can use ctx.perm and ctx.user directly as they will have been loaded above
|
|
allowedMerge, err := pull_service.IsUserAllowedToMerge(pr, ctx.userPerm, ctx.user)
|
|
if err != nil {
|
|
log.Error("Error calculating if allowed to merge: %v", err)
|
|
ctx.JSON(http.StatusInternalServerError, private.Response{
|
|
Err: fmt.Sprintf("Error calculating if allowed to merge: %v", err),
|
|
})
|
|
return
|
|
}
|
|
|
|
if !allowedMerge {
|
|
log.Warn("Forbidden: User %d is not allowed to push to protected branch: %s in %-v and is not allowed to merge pr #%d", ctx.opts.UserID, branchName, repo, pr.Index)
|
|
ctx.JSON(http.StatusForbidden, private.Response{
|
|
Err: fmt.Sprintf("Not allowed to push to protected branch %s", branchName),
|
|
})
|
|
return
|
|
}
|
|
|
|
// If we're an admin for the repository we can ignore status checks, reviews and override protected files
|
|
if ctx.userPerm.IsAdmin() {
|
|
return
|
|
}
|
|
|
|
// Now if we're not an admin - we can't overwrite protected files so fail now
|
|
if changedProtectedfiles {
|
|
log.Warn("Forbidden: Branch: %s in %-v is protected from changing file %s", branchName, repo, protectedFilePath)
|
|
ctx.JSON(http.StatusForbidden, private.Response{
|
|
Err: fmt.Sprintf("branch %s is protected from changing file %s", branchName, protectedFilePath),
|
|
})
|
|
return
|
|
}
|
|
|
|
// Check all status checks and reviews are ok
|
|
if err := pull_service.CheckPRReadyToMerge(ctx, pr, true); err != nil {
|
|
if models.IsErrNotAllowedToMerge(err) {
|
|
log.Warn("Forbidden: User %d is not allowed push to protected branch %s in %-v and pr #%d is not ready to be merged: %s", ctx.opts.UserID, branchName, repo, pr.Index, err.Error())
|
|
ctx.JSON(http.StatusForbidden, private.Response{
|
|
Err: fmt.Sprintf("Not allowed to push to protected branch %s and pr #%d is not ready to be merged: %s", branchName, ctx.opts.PullRequestID, err.Error()),
|
|
})
|
|
return
|
|
}
|
|
log.Error("Unable to check if mergable: protected branch %s in %-v and pr #%d. Error: %v", ctx.opts.UserID, branchName, repo, pr.Index, err)
|
|
ctx.JSON(http.StatusInternalServerError, private.Response{
|
|
Err: fmt.Sprintf("Unable to get status of pull request %d. Error: %v", ctx.opts.PullRequestID, err),
|
|
})
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
func preReceiveTag(ctx *preReceiveContext, oldCommitID, newCommitID, refFullName string) {
|
|
if !ctx.AssertCanWriteCode() {
|
|
return
|
|
}
|
|
|
|
tagName := strings.TrimPrefix(refFullName, git.TagPrefix)
|
|
|
|
if !ctx.gotProtectedTags {
|
|
var err error
|
|
ctx.protectedTags, err = models.GetProtectedTags(ctx.Repo.Repository.ID)
|
|
if err != nil {
|
|
log.Error("Unable to get protected tags for %-v Error: %v", ctx.Repo.Repository, err)
|
|
ctx.JSON(http.StatusInternalServerError, private.Response{
|
|
Err: err.Error(),
|
|
})
|
|
return
|
|
}
|
|
ctx.gotProtectedTags = true
|
|
}
|
|
|
|
isAllowed, err := models.IsUserAllowedToControlTag(ctx.protectedTags, tagName, ctx.opts.UserID)
|
|
if err != nil {
|
|
ctx.JSON(http.StatusInternalServerError, private.Response{
|
|
Err: err.Error(),
|
|
})
|
|
return
|
|
}
|
|
if !isAllowed {
|
|
log.Warn("Forbidden: Tag %s in %-v is protected", tagName, ctx.Repo.Repository)
|
|
ctx.JSON(http.StatusForbidden, private.Response{
|
|
Err: fmt.Sprintf("Tag %s is protected", tagName),
|
|
})
|
|
return
|
|
}
|
|
}
|
|
|
|
func preReceivePullRequest(ctx *preReceiveContext, oldCommitID, newCommitID, refFullName string) {
|
|
if !ctx.AssertCreatePullRequest() {
|
|
return
|
|
}
|
|
|
|
if ctx.Repo.Repository.IsEmpty {
|
|
ctx.JSON(http.StatusForbidden, map[string]interface{}{
|
|
"err": "Can't create pull request for an empty repository.",
|
|
})
|
|
return
|
|
}
|
|
|
|
if ctx.opts.IsWiki {
|
|
ctx.JSON(http.StatusForbidden, map[string]interface{}{
|
|
"err": "Pull requests are not supported on the wiki.",
|
|
})
|
|
return
|
|
}
|
|
|
|
baseBranchName := refFullName[len(git.PullRequestPrefix):]
|
|
|
|
baseBranchExist := false
|
|
if ctx.Repo.GitRepo.IsBranchExist(baseBranchName) {
|
|
baseBranchExist = true
|
|
}
|
|
|
|
if !baseBranchExist {
|
|
for p, v := range baseBranchName {
|
|
if v == '/' && ctx.Repo.GitRepo.IsBranchExist(baseBranchName[:p]) && p != len(baseBranchName)-1 {
|
|
baseBranchExist = true
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
if !baseBranchExist {
|
|
ctx.JSON(http.StatusForbidden, private.Response{
|
|
Err: fmt.Sprintf("Unexpected ref: %s", refFullName),
|
|
})
|
|
return
|
|
}
|
|
}
|
|
|
|
func generateGitEnv(opts *private.HookOptions) (env []string) {
|
|
env = os.Environ()
|
|
if opts.GitAlternativeObjectDirectories != "" {
|
|
env = append(env,
|
|
private.GitAlternativeObjectDirectories+"="+opts.GitAlternativeObjectDirectories)
|
|
}
|
|
if opts.GitObjectDirectory != "" {
|
|
env = append(env,
|
|
private.GitObjectDirectory+"="+opts.GitObjectDirectory)
|
|
}
|
|
if opts.GitQuarantinePath != "" {
|
|
env = append(env,
|
|
private.GitQuarantinePath+"="+opts.GitQuarantinePath)
|
|
}
|
|
return env
|
|
}
|
|
|
|
// loadPusherAndPermission returns false if an error occurs, and it writes the error response
|
|
func (ctx *preReceiveContext) loadPusherAndPermission() bool {
|
|
if ctx.loadedPusher {
|
|
return true
|
|
}
|
|
|
|
user, err := user_model.GetUserByID(ctx.opts.UserID)
|
|
if err != nil {
|
|
log.Error("Unable to get User id %d Error: %v", ctx.opts.UserID, err)
|
|
ctx.JSON(http.StatusInternalServerError, private.Response{
|
|
Err: fmt.Sprintf("Unable to get User id %d Error: %v", ctx.opts.UserID, err),
|
|
})
|
|
return false
|
|
}
|
|
ctx.user = user
|
|
|
|
userPerm, err := models.GetUserRepoPermission(ctx.Repo.Repository, user)
|
|
if err != nil {
|
|
log.Error("Unable to get Repo permission of repo %s/%s of User %s", ctx.Repo.Repository.OwnerName, ctx.Repo.Repository.Name, user.Name, err)
|
|
ctx.JSON(http.StatusInternalServerError, private.Response{
|
|
Err: fmt.Sprintf("Unable to get Repo permission of repo %s/%s of User %s: %v", ctx.Repo.Repository.OwnerName, ctx.Repo.Repository.Name, user.Name, err),
|
|
})
|
|
return false
|
|
}
|
|
ctx.userPerm = userPerm
|
|
|
|
if ctx.opts.DeployKeyID != 0 {
|
|
deployKey, err := asymkey_model.GetDeployKeyByID(ctx, ctx.opts.DeployKeyID)
|
|
if err != nil {
|
|
log.Error("Unable to get DeployKey id %d Error: %v", ctx.opts.DeployKeyID, err)
|
|
ctx.JSON(http.StatusInternalServerError, private.Response{
|
|
Err: fmt.Sprintf("Unable to get DeployKey id %d Error: %v", ctx.opts.DeployKeyID, err),
|
|
})
|
|
return false
|
|
}
|
|
ctx.deployKeyAccessMode = deployKey.Mode
|
|
}
|
|
|
|
ctx.loadedPusher = true
|
|
return true
|
|
}
|
|
|