image: move image source resolver away from old interface

client/client_test.go

@@ -250,6 +250,7 @@ var allTests = []func(t *testing.T, sb integration.Sandbox){
 	testHTTPResolveMetaReuse,
 	testHTTPResolveMultiBuild,
 	testGitResolveMutatedSource,
+	testImageResolveAttestationChainRequiresNetwork,
 }
 
 func TestIntegration(t *testing.T) {
@@ -12249,6 +12250,92 @@ func testHTTPResolveSourceMetadata(t *testing.T, sb integration.Sandbox) {
 	require.NoError(t, err)
 }
 
+func testImageResolveAttestationChainRequiresNetwork(t *testing.T, sb integration.Sandbox) {
+	// this test temporarily requires direct registry access as the integration test
+	// mirroring system does not support mirroring attestation chains yet.
+	// Support is coming in future buildx release.
+	ctx := sb.Context()
+	c, err := New(ctx, sb.Address())
+	require.NoError(t, err)
+	defer c.Close()
+
+	amd64, err := platforms.Parse("linux/amd64")
+	require.NoError(t, err)
+
+	_, err = c.Build(ctx, SolveOpt{}, "test", func(ctx context.Context, c gateway.Client) (*gateway.Result, error) {
+		const rootDigest = "sha256:4e91099af134f4b1f509fecbd1a55981dfff18d8029d6782e28413210ef468b7"
+		const imageDigest = "sha256:d2f0b39234a66c3d58f24200d3fda9e4e3d2263c09f9b7286a826ab639713047"
+		const attestationDigest = "sha256:fb4c46b14f52d1bf790f593921c52dddc698fc6780792fb8469fc60efc0e609b"
+		const sigDigest = "sha256:bd0a6b088440ba9838e8eec79e736128fe52afce934578eae30ca8675f6d3142"
+
+		id := "registry-1-stage.docker.io/docker/github-builder-test@" + rootDigest
+		md, err := c.ResolveSourceMetadata(ctx, &pb.SourceOp{
+			Identifier: "docker-image://" + id,
+		}, sourceresolver.Opt{
+			ImageOpt: &sourceresolver.ResolveImageOpt{
+				NoConfig:         true,
+				AttestationChain: true,
+				Platform:         &amd64,
+			},
+		})
+		if err != nil {
+			return nil, err
+		}
+		require.Equal(t, rootDigest, md.Image.Digest.String())
+		require.Nil(t, md.Image.Config)
+		require.NotNil(t, md.Image)
+		require.NotNil(t, md.Image.AttestationChain)
+		ac := md.Image.AttestationChain
+		require.Equal(t, rootDigest, ac.Root.String())
+		require.Equal(t, imageDigest, ac.ImageManifest.String())
+		require.Equal(t, attestationDigest, ac.AttestationManifest.String())
+		require.Len(t, ac.SignatureManifests, 1)
+		require.Equal(t, sigDigest, ac.SignatureManifests[0].String())
+
+		desc := ac.Blobs[ac.Root]
+		require.Equal(t, rootDigest, desc.Descriptor.Digest.String())
+		require.Len(t, desc.Data, int(desc.Descriptor.Size))
+		require.Equal(t, ocispecs.MediaTypeImageIndex, desc.Descriptor.MediaType)
+		chk := digest.FromBytes(desc.Data)
+		require.Equal(t, rootDigest, chk.String())
+
+		desc = ac.Blobs[ac.ImageManifest]
+		// image manifest is expected to be missing as content is not needed to verify attestation chain
+		_, ok := ac.Blobs[digest.Digest(imageDigest)]
+		require.False(t, ok)
+
+		desc = ac.Blobs[ac.AttestationManifest]
+		require.Equal(t, attestationDigest, desc.Descriptor.Digest.String())
+		require.Equal(t, ocispecs.MediaTypeImageManifest, desc.Descriptor.MediaType)
+		require.Len(t, desc.Data, int(desc.Descriptor.Size))
+		chk = digest.FromBytes(desc.Data)
+		require.Equal(t, attestationDigest, chk.String())
+
+		desc = ac.Blobs[ac.SignatureManifests[0]]
+		require.Equal(t, sigDigest, desc.Descriptor.Digest.String())
+		require.Equal(t, ocispecs.MediaTypeImageManifest, desc.Descriptor.MediaType)
+		require.Len(t, desc.Data, int(desc.Descriptor.Size))
+		chk = digest.FromBytes(desc.Data)
+		require.Equal(t, sigDigest, chk.String())
+
+		var sigMfst ocispecs.Manifest
+		err = json.Unmarshal(ac.Blobs[ac.SignatureManifests[0]].Data, &sigMfst)
+		require.NoError(t, err)
+		require.Equal(t, 1, len(sigMfst.Layers))
+		sigLayer := sigMfst.Layers[0]
+		sigDesc := ac.Blobs[digest.Digest(sigLayer.Digest)]
+		require.Equal(t, sigLayer.Digest, sigDesc.Descriptor.Digest)
+		require.Len(t, sigDesc.Data, int(sigDesc.Descriptor.Size))
+		require.Equal(t, "application/vnd.dev.sigstore.bundle.v0.3+json", sigDesc.Descriptor.MediaType)
+		chk = digest.FromBytes(sigDesc.Data)
+		require.Equal(t, sigLayer.Digest, chk)
+
+		require.Len(t, md.Image.AttestationChain.Blobs, 4)
+		return nil, nil
+	}, nil)
+	require.NoError(t, err)
+}
+
 func testHTTPPruneAfterCacheKey(t *testing.T, sb integration.Sandbox) {
 	// this test depends on hitting race condition in internal functions.
 	// If debugging and expecting failure you can add small sleep in beginning of source/http.Exec() to hit reliably

client/llb/imagemetaresolver/resolver.go

@@ -86,8 +86,8 @@ func (imr *imageMetaResolver) ResolveImageConfig(ctx context.Context, ref string
 	defer imr.locker.Unlock(ref)
 
 	platform := imr.platform
-	if opt.Platform != nil {
-		platform = opt.Platform
+	if imgOpt := opt.ImageOpt; imgOpt != nil && imgOpt.Platform != nil {
+		platform = imgOpt.Platform
 	}
 
 	k := imr.key(ref, platform)

client/llb/resolver_test.go

@@ -87,8 +87,8 @@ func (r *testResolver) ResolveImageConfig(ctx context.Context, ref string, opt s
 
 	img.Config.WorkingDir = r.dir
 
-	if opt.Platform != nil {
-		r.platform = platforms.Format(*opt.Platform)
+	if imgOpt := opt.ImageOpt; imgOpt != nil && imgOpt.Platform != nil {
+		r.platform = platforms.Format(*imgOpt.Platform)
 	}
 
 	dt, err := json.Marshal(img)

client/llb/source.go

@@ -146,8 +146,8 @@ func Image(ref string, opts ...ImageOption) State {
 					p = c.Platform
 				}
 				_, _, dt, err := info.metaResolver.ResolveImageConfig(ctx, ref, sourceresolver.Opt{
-					Platform: p,
 					ImageOpt: &sourceresolver.ResolveImageOpt{
+						Platform:    p,
 						ResolveMode: info.resolveMode.String(),
 					},
 				})
@@ -163,8 +163,8 @@ func Image(ref string, opts ...ImageOption) State {
 				p = c.Platform
 			}
 			ref, dgst, dt, err := info.metaResolver.ResolveImageConfig(context.TODO(), ref, sourceresolver.Opt{
-				Platform: p,
 				ImageOpt: &sourceresolver.ResolveImageOpt{
+					Platform:    p,
 					ResolveMode: info.resolveMode.String(),
 				},
 			})

client/llb/sourceresolver/types.go

@@ -24,7 +24,6 @@ type MetaResolver interface {
 type Opt struct {
 	LogName        string
 	SourcePolicies []*spb.Policy
-	Platform       *ocispecs.Platform
 
 	ImageOpt     *ResolveImageOpt
 	OCILayoutOpt *ResolveOCILayoutOpt
@@ -40,12 +39,29 @@ type MetaResponse struct {
 }
 
 type ResolveImageOpt struct {
-	ResolveMode string
+	Platform         *ocispecs.Platform
+	ResolveMode      string
+	NoConfig         bool
+	AttestationChain bool
 }
 
 type ResolveImageResponse struct {
-	Digest digest.Digest
-	Config []byte
+	Digest           digest.Digest
+	Config           []byte
+	AttestationChain *AttestationChain
+}
+
+type AttestationChain struct {
+	Root                digest.Digest
+	ImageManifest       digest.Digest
+	AttestationManifest digest.Digest
+	SignatureManifests  []digest.Digest
+	Blobs               map[digest.Digest]Blob
+}
+
+type Blob struct {
+	Descriptor ocispecs.Descriptor
+	Data       []byte
 }
 
 type ResolveGitOpt struct {
@@ -67,7 +83,8 @@ type ResolveHTTPResponse struct {
 }
 
 type ResolveOCILayoutOpt struct {
-	Store ResolveImageConfigOptStore
+	Platform *ocispecs.Platform
+	Store    ResolveImageConfigOptStore
 }
 
 type ResolveImageConfigOptStore struct {

frontend/dockerfile/dockerfile2llb/convert.go

@@ -541,9 +541,9 @@ func toDispatchState(ctx context.Context, dt []byte, opt ConvertOpt) (*dispatchS
 							}
 							prefix += "internal]"
 							mutRef, dgst, dt, err := metaResolver.ResolveImageConfig(ctx, d.stage.BaseName, sourceresolver.Opt{
-								LogName:  fmt.Sprintf("%s load metadata for %s", prefix, d.stage.BaseName),
-								Platform: platform,
+								LogName: fmt.Sprintf("%s load metadata for %s", prefix, d.stage.BaseName),
 								ImageOpt: &sourceresolver.ResolveImageOpt{
+									Platform:    platform,
 									ResolveMode: opt.ImageResolveMode.String(),
 								},
 							})

frontend/dockerui/namedcontext.go

@@ -94,9 +94,9 @@ func (nc *NamedContext) load(ctx context.Context, count int) (*llb.State, *docke
 		named = reference.TagNameOnly(named)
 
 		ref, dgst, data, err := nc.bc.client.ResolveImageConfig(ctx, named.String(), sourceresolver.Opt{
-			LogName:  fmt.Sprintf("[context %s] load metadata for %s", nc.nameWithPlatform, ref),
-			Platform: opt.Platform,
+			LogName: fmt.Sprintf("[context %s] load metadata for %s", nc.nameWithPlatform, ref),
 			ImageOpt: &sourceresolver.ResolveImageOpt{
+				Platform:    opt.Platform,
 				ResolveMode: opt.ResolveMode,
 			},
 		})
@@ -183,9 +183,9 @@ func (nc *NamedContext) load(ctx context.Context, count int) (*llb.State, *docke
 		}
 
 		_, dgst, data, err := nc.bc.client.ResolveImageConfig(ctx, dummyRef.String(), sourceresolver.Opt{
-			LogName:  fmt.Sprintf("[context %s] load metadata for %s", nc.nameWithPlatform, dummyRef.String()),
-			Platform: opt.Platform,
+			LogName: fmt.Sprintf("[context %s] load metadata for %s", nc.nameWithPlatform, dummyRef.String()),
 			OCILayoutOpt: &sourceresolver.ResolveOCILayoutOpt{
+				Platform: opt.Platform,
 				Store: sourceresolver.ResolveImageConfigOptStore{
 					SessionID: nc.bc.bopts.SessionID,
 					StoreID:   named.Name(),

frontend/gateway/gateway.go

@@ -631,10 +631,17 @@ func (lbf *llbBridgeForwarder) ResolveSourceMeta(ctx context.Context, req *pb.Re
 	resolveopt := sourceresolver.Opt{
 		LogName:        req.LogName,
 		SourcePolicies: req.SourcePolicies,
-		Platform:       platform,
 	}
 	resolveopt.ImageOpt = &sourceresolver.ResolveImageOpt{
 		ResolveMode: req.ResolveMode,
+		Platform:    platform,
+	}
+	if req.Image != nil {
+		resolveopt.ImageOpt.NoConfig = req.Image.NoConfig
+		resolveopt.ImageOpt.AttestationChain = req.Image.AttestationChain
+	}
+	resolveopt.OCILayoutOpt = &sourceresolver.ResolveOCILayoutOpt{
+		Platform: platform,
 	}
 	if req.Git != nil {
 		resolveopt.GitOpt = &sourceresolver.ResolveGitOpt{
@@ -656,6 +663,9 @@ func (lbf *llbBridgeForwarder) ResolveSourceMeta(ctx context.Context, req *pb.Re
 			Digest: string(resp.Image.Digest),
 			Config: resp.Image.Config,
 		}
+		if resp.Image.AttestationChain != nil {
+			r.Image.AttestationChain = toPBAttestationChain(resp.Image.AttestationChain)
+		}
 	}
 	if resp.Git != nil {
 		r.Git = &pb.ResolveSourceGitResponse{
@@ -698,18 +708,19 @@ func (lbf *llbBridgeForwarder) ResolveImageConfig(ctx context.Context, req *pb.R
 	resolveopt := sourceresolver.Opt{
 		LogName:        req.LogName,
 		SourcePolicies: req.SourcePolicies,
-		Platform:       platform,
 	}
 	if sourceresolver.ResolverType(req.ResolverType) == sourceresolver.ResolverTypeRegistry {
 		resolveopt.ImageOpt = &sourceresolver.ResolveImageOpt{
 			ResolveMode: req.ResolveMode,
+			Platform:    platform,
 		}
 	} else if sourceresolver.ResolverType(req.ResolverType) == sourceresolver.ResolverTypeOCILayout {
 		resolveopt.OCILayoutOpt = &sourceresolver.ResolveOCILayoutOpt{
 			Store: sourceresolver.ResolveImageConfigOptStore{
 				SessionID: req.SessionID,
 				StoreID:   req.StoreID,
 			},
+			Platform: platform,
 		}
 	}
 
@@ -1694,6 +1705,33 @@ func getCaps(label string) map[string]struct{} {
 	return out
 }
 
+func toPBAttestationChain(ac *sourceresolver.AttestationChain) *pb.AttestationChain {
+	if ac == nil {
+		return nil
+	}
+	out := &pb.AttestationChain{
+		Root:                string(ac.Root),
+		ImageManifest:       string(ac.ImageManifest),
+		AttestationManifest: string(ac.AttestationManifest),
+		Blobs:               make(map[string]*pb.Blob),
+	}
+	for _, s := range ac.SignatureManifests {
+		out.SignatureManifests = append(out.SignatureManifests, string(s))
+	}
+	for k, v := range ac.Blobs {
+		out.Blobs[k.String()] = &pb.Blob{
+			Descriptor_: &pb.Descriptor{
+				MediaType:   v.Descriptor.MediaType,
+				Size:        v.Descriptor.Size,
+				Digest:      string(v.Descriptor.Digest),
+				Annotations: maps.Clone(v.Descriptor.Annotations),
+			},
+			Data: v.Data,
+		}
+	}
+	return out
+}
+
 func addCapsForKnownFrontends(caps map[string]struct{}, dgst digest.Digest) {
 	// these frontends were built without caps detection but do support inputs
 	defaults := map[digest.Digest]struct{}{