gitea/routers/api/packages/container/manifest.go

413 lines
11 KiB
Go

// Copyright 2022 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 container
import (
"context"
"fmt"
"io"
"strings"
"code.gitea.io/gitea/models/db"
packages_model "code.gitea.io/gitea/models/packages"
container_model "code.gitea.io/gitea/models/packages/container"
user_model "code.gitea.io/gitea/models/user"
"code.gitea.io/gitea/modules/json"
"code.gitea.io/gitea/modules/log"
packages_module "code.gitea.io/gitea/modules/packages"
container_module "code.gitea.io/gitea/modules/packages/container"
"code.gitea.io/gitea/modules/packages/container/oci"
packages_service "code.gitea.io/gitea/services/packages"
)
// manifestCreationInfo describes a manifest to create
type manifestCreationInfo struct {
MediaType oci.MediaType
Owner *user_model.User
Creator *user_model.User
Image string
Reference string
IsTagged bool
Properties map[string]string
}
func processManifest(mci *manifestCreationInfo, buf *packages_module.HashedBuffer) (string, error) {
var schema oci.SchemaMediaBase
if err := json.NewDecoder(buf).Decode(&schema); err != nil {
return "", err
}
if schema.SchemaVersion != 2 {
return "", errUnsupported.WithMessage("Schema version is not supported")
}
if _, err := buf.Seek(0, io.SeekStart); err != nil {
return "", err
}
if !mci.MediaType.IsValid() {
mci.MediaType = schema.MediaType
if !mci.MediaType.IsValid() {
return "", errManifestInvalid.WithMessage("MediaType not recognized")
}
}
if mci.MediaType.IsImageManifest() {
d, err := processImageManifest(mci, buf)
return d, err
} else if mci.MediaType.IsImageIndex() {
d, err := processImageManifestIndex(mci, buf)
return d, err
}
return "", errManifestInvalid
}
func processImageManifest(mci *manifestCreationInfo, buf *packages_module.HashedBuffer) (string, error) {
manifestDigest := ""
err := func() error {
var manifest oci.Manifest
if err := json.NewDecoder(buf).Decode(&manifest); err != nil {
return err
}
if _, err := buf.Seek(0, io.SeekStart); err != nil {
return err
}
ctx, committer, err := db.TxContext()
if err != nil {
return err
}
defer committer.Close()
configDescriptor, err := container_model.GetContainerBlob(ctx, &container_model.BlobSearchOptions{
OwnerID: mci.Owner.ID,
Image: mci.Image,
Digest: string(manifest.Config.Digest),
})
if err != nil {
return err
}
configReader, err := packages_module.NewContentStore().Get(packages_module.BlobHash256Key(configDescriptor.Blob.HashSHA256))
if err != nil {
return err
}
defer configReader.Close()
metadata, err := container_module.ParseImageConfig(manifest.Config.MediaType, configReader)
if err != nil {
return err
}
blobReferences := make([]*blobReference, 0, 1+len(manifest.Layers))
blobReferences = append(blobReferences, &blobReference{
Digest: manifest.Config.Digest,
MediaType: manifest.Config.MediaType,
File: configDescriptor,
ExpectedSize: manifest.Config.Size,
})
for _, layer := range manifest.Layers {
pfd, err := container_model.GetContainerBlob(ctx, &container_model.BlobSearchOptions{
OwnerID: mci.Owner.ID,
Image: mci.Image,
Digest: string(layer.Digest),
})
if err != nil {
return err
}
blobReferences = append(blobReferences, &blobReference{
Digest: layer.Digest,
MediaType: layer.MediaType,
File: pfd,
ExpectedSize: layer.Size,
})
}
pv, err := createPackageAndVersion(ctx, mci, metadata)
if err != nil {
return err
}
uploadVersion, err := packages_model.GetInternalVersionByNameAndVersion(ctx, mci.Owner.ID, packages_model.TypeContainer, mci.Image, container_model.UploadVersion)
if err != nil && err != packages_model.ErrPackageNotExist {
return err
}
for _, ref := range blobReferences {
if err := createFileFromBlobReference(ctx, pv, uploadVersion, ref); err != nil {
return err
}
}
pb, created, digest, err := createManifestBlob(ctx, mci, pv, buf)
removeBlob := false
defer func() {
if removeBlob {
contentStore := packages_module.NewContentStore()
if err := contentStore.Delete(packages_module.BlobHash256Key(pb.HashSHA256)); err != nil {
log.Error("Error deleting package blob from content store: %v", err)
}
}
}()
if err != nil {
removeBlob = created
return err
}
if err := committer.Commit(); err != nil {
removeBlob = created
return err
}
manifestDigest = digest
return nil
}()
if err != nil {
return "", err
}
return manifestDigest, nil
}
func processImageManifestIndex(mci *manifestCreationInfo, buf *packages_module.HashedBuffer) (string, error) {
manifestDigest := ""
err := func() error {
var index oci.Index
if err := json.NewDecoder(buf).Decode(&index); err != nil {
return err
}
if _, err := buf.Seek(0, io.SeekStart); err != nil {
return err
}
ctx, committer, err := db.TxContext()
if err != nil {
return err
}
defer committer.Close()
metadata := &container_module.Metadata{
Type: container_module.TypeOCI,
MultiArch: make(map[string]string),
}
for _, manifest := range index.Manifests {
if !manifest.MediaType.IsImageManifest() {
return errManifestInvalid
}
platform := container_module.DefaultPlatform
if manifest.Platform != nil {
platform = fmt.Sprintf("%s/%s", manifest.Platform.OS, manifest.Platform.Architecture)
if manifest.Platform.Variant != "" {
platform = fmt.Sprintf("%s/%s", platform, manifest.Platform.Variant)
}
}
_, err := container_model.GetContainerBlob(ctx, &container_model.BlobSearchOptions{
OwnerID: mci.Owner.ID,
Image: mci.Image,
Digest: string(manifest.Digest),
IsManifest: true,
})
if err != nil {
if err == container_model.ErrContainerBlobNotExist {
return errManifestBlobUnknown
}
return err
}
metadata.MultiArch[platform] = string(manifest.Digest)
}
pv, err := createPackageAndVersion(ctx, mci, metadata)
if err != nil {
return err
}
pb, created, digest, err := createManifestBlob(ctx, mci, pv, buf)
removeBlob := false
defer func() {
if removeBlob {
contentStore := packages_module.NewContentStore()
if err := contentStore.Delete(packages_module.BlobHash256Key(pb.HashSHA256)); err != nil {
log.Error("Error deleting package blob from content store: %v", err)
}
}
}()
if err != nil {
removeBlob = created
return err
}
if err := committer.Commit(); err != nil {
removeBlob = created
return err
}
manifestDigest = digest
return nil
}()
if err != nil {
return "", err
}
return manifestDigest, nil
}
func createPackageAndVersion(ctx context.Context, mci *manifestCreationInfo, metadata *container_module.Metadata) (*packages_model.PackageVersion, error) {
p := &packages_model.Package{
OwnerID: mci.Owner.ID,
Type: packages_model.TypeContainer,
Name: strings.ToLower(mci.Image),
LowerName: strings.ToLower(mci.Image),
}
var err error
if p, err = packages_model.TryInsertPackage(ctx, p); err != nil {
if err != packages_model.ErrDuplicatePackage {
log.Error("Error inserting package: %v", err)
return nil, err
}
}
metadata.IsTagged = mci.IsTagged
metadataJSON, err := json.Marshal(metadata)
if err != nil {
return nil, err
}
_pv := &packages_model.PackageVersion{
PackageID: p.ID,
CreatorID: mci.Creator.ID,
Version: strings.ToLower(mci.Reference),
LowerVersion: strings.ToLower(mci.Reference),
MetadataJSON: string(metadataJSON),
}
var pv *packages_model.PackageVersion
if pv, err = packages_model.GetOrInsertVersion(ctx, _pv); err != nil {
if err == packages_model.ErrDuplicatePackageVersion {
if err := packages_service.DeletePackageVersionAndReferences(ctx, pv); err != nil {
return nil, err
}
if pv, err = packages_model.GetOrInsertVersion(ctx, _pv); err != nil {
log.Error("Error inserting package: %v", err)
return nil, err
}
} else {
log.Error("Error inserting package: %v", err)
return nil, err
}
}
if mci.IsTagged {
if _, err := packages_model.InsertProperty(ctx, packages_model.PropertyTypeVersion, pv.ID, container_module.PropertyManifestTagged, ""); err != nil {
log.Error("Error setting package version property: %v", err)
return nil, err
}
}
for _, digest := range metadata.MultiArch {
if _, err := packages_model.InsertProperty(ctx, packages_model.PropertyTypeVersion, pv.ID, container_module.PropertyManifestReference, digest); err != nil {
log.Error("Error setting package version property: %v", err)
return nil, err
}
}
return pv, nil
}
type blobReference struct {
Digest oci.Digest
MediaType oci.MediaType
Name string
File *packages_model.PackageFileDescriptor
ExpectedSize int64
IsLead bool
}
func createFileFromBlobReference(ctx context.Context, pv, uploadVersion *packages_model.PackageVersion, ref *blobReference) error {
if ref.File.Blob.Size != ref.ExpectedSize {
return errSizeInvalid
}
if ref.Name == "" {
ref.Name = strings.ToLower(fmt.Sprintf("sha256_%s", ref.File.Blob.HashSHA256))
}
pf := &packages_model.PackageFile{
VersionID: pv.ID,
BlobID: ref.File.Blob.ID,
Name: ref.Name,
LowerName: ref.Name,
IsLead: ref.IsLead,
}
var err error
if pf, err = packages_model.TryInsertFile(ctx, pf); err != nil {
if err == packages_model.ErrDuplicatePackageFile {
// Skip this blob because the manifest contains the same filesystem layer multiple times.
return nil
}
log.Error("Error inserting package file: %v", err)
return err
}
props := map[string]string{
container_module.PropertyMediaType: string(ref.MediaType),
container_module.PropertyDigest: string(ref.Digest),
}
for name, value := range props {
if _, err := packages_model.InsertProperty(ctx, packages_model.PropertyTypeFile, pf.ID, name, value); err != nil {
log.Error("Error setting package file property: %v", err)
return err
}
}
// Remove the file from the blob upload version
if uploadVersion != nil && ref.File.File != nil && uploadVersion.ID == ref.File.File.VersionID {
if err := packages_service.DeletePackageFile(ctx, ref.File.File); err != nil {
return err
}
}
return nil
}
func createManifestBlob(ctx context.Context, mci *manifestCreationInfo, pv *packages_model.PackageVersion, buf *packages_module.HashedBuffer) (*packages_model.PackageBlob, bool, string, error) {
pb, exists, err := packages_model.GetOrInsertBlob(ctx, packages_service.NewPackageBlob(buf))
if err != nil {
log.Error("Error inserting package blob: %v", err)
return nil, false, "", err
}
if !exists {
contentStore := packages_module.NewContentStore()
if err := contentStore.Save(packages_module.BlobHash256Key(pb.HashSHA256), buf, buf.Size()); err != nil {
log.Error("Error saving package blob in content store: %v", err)
return nil, false, "", err
}
}
manifestDigest := digestFromHashSummer(buf)
err = createFileFromBlobReference(ctx, pv, nil, &blobReference{
Digest: oci.Digest(manifestDigest),
MediaType: mci.MediaType,
Name: container_model.ManifestFilename,
File: &packages_model.PackageFileDescriptor{Blob: pb},
ExpectedSize: pb.Size,
IsLead: true,
})
return pb, !exists, manifestDigest, err
}