gitea/services/packages/alpine/repository.go

333 lines
9.3 KiB
Go

// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package alpine
import (
"archive/tar"
"bytes"
"compress/gzip"
"context"
"crypto"
"crypto/rand"
"crypto/rsa"
"crypto/sha1"
"crypto/x509"
"encoding/hex"
"encoding/pem"
"errors"
"fmt"
"io"
"strings"
packages_model "code.gitea.io/gitea/models/packages"
alpine_model "code.gitea.io/gitea/models/packages/alpine"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/json"
packages_module "code.gitea.io/gitea/modules/packages"
alpine_module "code.gitea.io/gitea/modules/packages/alpine"
"code.gitea.io/gitea/modules/util"
packages_service "code.gitea.io/gitea/services/packages"
)
const IndexFilename = "APKINDEX.tar.gz"
// GetOrCreateRepositoryVersion gets or creates the internal repository package
// The Alpine registry needs multiple index files which are stored in this package.
func GetOrCreateRepositoryVersion(ctx context.Context, ownerID int64) (*packages_model.PackageVersion, error) {
return packages_service.GetOrCreateInternalPackageVersion(ctx, ownerID, packages_model.TypeAlpine, alpine_module.RepositoryPackage, alpine_module.RepositoryVersion)
}
// GetOrCreateKeyPair gets or creates the RSA keys used to sign repository files
func GetOrCreateKeyPair(ctx context.Context, ownerID int64) (string, string, error) {
priv, err := user_model.GetSetting(ctx, ownerID, alpine_module.SettingKeyPrivate)
if err != nil && !errors.Is(err, util.ErrNotExist) {
return "", "", err
}
pub, err := user_model.GetSetting(ctx, ownerID, alpine_module.SettingKeyPublic)
if err != nil && !errors.Is(err, util.ErrNotExist) {
return "", "", err
}
if priv == "" || pub == "" {
priv, pub, err = util.GenerateKeyPair(4096)
if err != nil {
return "", "", err
}
if err := user_model.SetUserSetting(ctx, ownerID, alpine_module.SettingKeyPrivate, priv); err != nil {
return "", "", err
}
if err := user_model.SetUserSetting(ctx, ownerID, alpine_module.SettingKeyPublic, pub); err != nil {
return "", "", err
}
}
return priv, pub, nil
}
// BuildAllRepositoryFiles (re)builds all repository files for every available distributions, components and architectures
func BuildAllRepositoryFiles(ctx context.Context, ownerID int64) error {
pv, err := GetOrCreateRepositoryVersion(ctx, ownerID)
if err != nil {
return err
}
// 1. Delete all existing repository files
pfs, err := packages_model.GetFilesByVersionID(ctx, pv.ID)
if err != nil {
return err
}
for _, pf := range pfs {
if err := packages_model.DeleteAllProperties(ctx, packages_model.PropertyTypeFile, pf.ID); err != nil {
return err
}
if err := packages_model.DeleteFileByID(ctx, pf.ID); err != nil {
return err
}
}
// 2. (Re)Build repository files for existing packages
branches, err := alpine_model.GetBranches(ctx, ownerID)
if err != nil {
return err
}
for _, branch := range branches {
repositories, err := alpine_model.GetRepositories(ctx, ownerID, branch)
if err != nil {
return err
}
for _, repository := range repositories {
architectures, err := alpine_model.GetArchitectures(ctx, ownerID, repository)
if err != nil {
return err
}
for _, architecture := range architectures {
if err := buildPackagesIndex(ctx, ownerID, pv, branch, repository, architecture); err != nil {
return fmt.Errorf("failed to build repository files [%s/%s/%s]: %w", branch, repository, architecture, err)
}
}
}
}
return nil
}
// BuildSpecificRepositoryFiles builds index files for the repository
func BuildSpecificRepositoryFiles(ctx context.Context, ownerID int64, branch, repository, architecture string) error {
pv, err := GetOrCreateRepositoryVersion(ctx, ownerID)
if err != nil {
return err
}
return buildPackagesIndex(ctx, ownerID, pv, branch, repository, architecture)
}
type packageData struct {
Package *packages_model.Package
Version *packages_model.PackageVersion
Blob *packages_model.PackageBlob
VersionMetadata *alpine_module.VersionMetadata
FileMetadata *alpine_module.FileMetadata
}
type packageCache = map[*packages_model.PackageFile]*packageData
// https://wiki.alpinelinux.org/wiki/Apk_spec#APKINDEX_Format
func buildPackagesIndex(ctx context.Context, ownerID int64, repoVersion *packages_model.PackageVersion, branch, repository, architecture string) error {
pfs, _, err := packages_model.SearchFiles(ctx, &packages_model.PackageFileSearchOptions{
OwnerID: ownerID,
PackageType: packages_model.TypeAlpine,
Query: "%.apk",
Properties: map[string]string{
alpine_module.PropertyBranch: branch,
alpine_module.PropertyRepository: repository,
alpine_module.PropertyArchitecture: architecture,
},
})
if err != nil {
return err
}
// Delete the package indices if there are no packages
if len(pfs) == 0 {
pf, err := packages_model.GetFileForVersionByName(ctx, repoVersion.ID, IndexFilename, fmt.Sprintf("%s|%s|%s", branch, repository, architecture))
if err != nil && !errors.Is(err, util.ErrNotExist) {
return err
}
if err := packages_model.DeleteAllProperties(ctx, packages_model.PropertyTypeFile, pf.ID); err != nil {
return err
}
return packages_model.DeleteFileByID(ctx, pf.ID)
}
// Cache data needed for all repository files
cache := make(packageCache)
for _, pf := range pfs {
pv, err := packages_model.GetVersionByID(ctx, pf.VersionID)
if err != nil {
return err
}
p, err := packages_model.GetPackageByID(ctx, pv.PackageID)
if err != nil {
return err
}
pb, err := packages_model.GetBlobByID(ctx, pf.BlobID)
if err != nil {
return err
}
pps, err := packages_model.GetPropertiesByName(ctx, packages_model.PropertyTypeFile, pf.ID, alpine_module.PropertyMetadata)
if err != nil {
return err
}
pd := &packageData{
Package: p,
Version: pv,
Blob: pb,
}
if err := json.Unmarshal([]byte(pv.MetadataJSON), &pd.VersionMetadata); err != nil {
return err
}
if len(pps) > 0 {
if err := json.Unmarshal([]byte(pps[0].Value), &pd.FileMetadata); err != nil {
return err
}
}
cache[pf] = pd
}
var buf bytes.Buffer
for _, pf := range pfs {
pd := cache[pf]
fmt.Fprintf(&buf, "C:%s\n", pd.FileMetadata.Checksum)
fmt.Fprintf(&buf, "P:%s\n", pd.Package.Name)
fmt.Fprintf(&buf, "V:%s\n", pd.Version.Version)
fmt.Fprintf(&buf, "A:%s\n", pd.FileMetadata.Architecture)
if pd.VersionMetadata.Description != "" {
fmt.Fprintf(&buf, "T:%s\n", pd.VersionMetadata.Description)
}
if pd.VersionMetadata.ProjectURL != "" {
fmt.Fprintf(&buf, "U:%s\n", pd.VersionMetadata.ProjectURL)
}
if pd.VersionMetadata.License != "" {
fmt.Fprintf(&buf, "L:%s\n", pd.VersionMetadata.License)
}
fmt.Fprintf(&buf, "S:%d\n", pd.Blob.Size)
fmt.Fprintf(&buf, "I:%d\n", pd.FileMetadata.Size)
fmt.Fprintf(&buf, "o:%s\n", pd.FileMetadata.Origin)
fmt.Fprintf(&buf, "m:%s\n", pd.VersionMetadata.Maintainer)
fmt.Fprintf(&buf, "t:%d\n", pd.FileMetadata.BuildDate)
if pd.FileMetadata.CommitHash != "" {
fmt.Fprintf(&buf, "c:%s\n", pd.FileMetadata.CommitHash)
}
if len(pd.FileMetadata.Dependencies) > 0 {
fmt.Fprintf(&buf, "D:%s\n", strings.Join(pd.FileMetadata.Dependencies, " "))
}
if len(pd.FileMetadata.Provides) > 0 {
fmt.Fprintf(&buf, "p:%s\n", strings.Join(pd.FileMetadata.Provides, " "))
}
fmt.Fprint(&buf, "\n")
}
unsignedIndexContent, _ := packages_module.NewHashedBuffer()
defer unsignedIndexContent.Close()
h := sha1.New()
if err := writeGzipStream(io.MultiWriter(unsignedIndexContent, h), "APKINDEX", buf.Bytes(), true); err != nil {
return err
}
priv, _, err := GetOrCreateKeyPair(ctx, ownerID)
if err != nil {
return err
}
privPem, _ := pem.Decode([]byte(priv))
if privPem == nil {
return fmt.Errorf("failed to decode private key pem")
}
privKey, err := x509.ParsePKCS1PrivateKey(privPem.Bytes)
if err != nil {
return err
}
sign, err := rsa.SignPKCS1v15(rand.Reader, privKey, crypto.SHA1, h.Sum(nil))
if err != nil {
return err
}
owner, err := user_model.GetUserByID(ctx, ownerID)
if err != nil {
return err
}
fingerprint, err := util.CreatePublicKeyFingerprint(&privKey.PublicKey)
if err != nil {
return err
}
signedIndexContent, _ := packages_module.NewHashedBuffer()
defer signedIndexContent.Close()
if err := writeGzipStream(
signedIndexContent,
fmt.Sprintf(".SIGN.RSA.%s@%s.rsa.pub", owner.LowerName, hex.EncodeToString(fingerprint)),
sign,
false,
); err != nil {
return err
}
if _, err := io.Copy(signedIndexContent, unsignedIndexContent); err != nil {
return err
}
_, err = packages_service.AddFileToPackageVersionInternal(
ctx,
repoVersion,
&packages_service.PackageFileCreationInfo{
PackageFileInfo: packages_service.PackageFileInfo{
Filename: IndexFilename,
CompositeKey: fmt.Sprintf("%s|%s|%s", branch, repository, architecture),
},
Creator: user_model.NewGhostUser(),
Data: signedIndexContent,
IsLead: false,
OverwriteExisting: true,
},
)
return err
}
func writeGzipStream(w io.Writer, filename string, content []byte, addTarEnd bool) error {
zw := gzip.NewWriter(w)
defer zw.Close()
tw := tar.NewWriter(zw)
if addTarEnd {
defer tw.Close()
}
hdr := &tar.Header{
Name: filename,
Mode: 0o600,
Size: int64(len(content)),
}
if err := tw.WriteHeader(hdr); err != nil {
return err
}
if _, err := tw.Write(content); err != nil {
return err
}
return nil
}