save image remove signatures

remove signatures to podman save since the image formats do not support signatures
Close: #7659

Signed-off-by: Qi Wang <qiwan@redhat.com>

libpod/image/image.go

@@ -177,7 +177,7 @@ func (ir *Runtime) New(ctx context.Context, name, signaturePolicyPath, authfile
 // SaveImages stores one more images in a multi-image archive.
 // Note that only `docker-archive` supports storing multiple
 // image.
-func (ir *Runtime) SaveImages(ctx context.Context, namesOrIDs []string, format string, outputFile string, quiet bool) (finalErr error) {
+func (ir *Runtime) SaveImages(ctx context.Context, namesOrIDs []string, format string, outputFile string, quiet, removeSignatures bool) (finalErr error) {
 	if format != DockerArchive {
 		return errors.Errorf("multi-image archives are only supported in in the %q format", DockerArchive)
 	}
@@ -264,7 +264,7 @@ func (ir *Runtime) SaveImages(ctx context.Context, namesOrIDs []string, format s
 		}
 
 		img := imageMap[id]
-		copyOptions := getCopyOptions(sys, writer, nil, nil, SigningOptions{}, "", img.tags)
+		copyOptions := getCopyOptions(sys, writer, nil, nil, SigningOptions{RemoveSignatures: removeSignatures}, "", img.tags)
 		copyOptions.DestinationCtx.SystemRegistriesConfPath = registries.SystemRegistriesConfPath()
 
 		// For copying, we need a source reference that we can create
@@ -1584,7 +1584,7 @@ func (i *Image) Comment(ctx context.Context, manifestType string) (string, error
 }
 
 // Save writes a container image to the filesystem
-func (i *Image) Save(ctx context.Context, source, format, output string, moreTags []string, quiet, compress bool) error {
+func (i *Image) Save(ctx context.Context, source, format, output string, moreTags []string, quiet, compress, removeSignatures bool) error {
 	var (
 		writer       io.Writer
 		destRef      types.ImageReference
@@ -1636,7 +1636,7 @@ func (i *Image) Save(ctx context.Context, source, format, output string, moreTag
 			return err
 		}
 	}
-	if err := i.PushImageToReference(ctx, destRef, manifestType, "", "", "", writer, compress, SigningOptions{}, &DockerRegistryOptions{}, additionaltags); err != nil {
+	if err := i.PushImageToReference(ctx, destRef, manifestType, "", "", "", writer, compress, SigningOptions{RemoveSignatures: removeSignatures}, &DockerRegistryOptions{}, additionaltags); err != nil {
 		return errors.Wrapf(err, "unable to save %q", source)
 	}
 	i.newImageEvent(events.Save)

pkg/api/handlers/compat/images.go

@@ -60,7 +60,7 @@ func ExportImage(w http.ResponseWriter, r *http.Request) {
 		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "unable to close tempfile"))
 		return
 	}
-	if err := newImage.Save(r.Context(), name, "docker-archive", tmpfile.Name(), []string{}, false, false); err != nil {
+	if err := newImage.Save(r.Context(), name, "docker-archive", tmpfile.Name(), []string{}, false, false, true); err != nil {
 		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "failed to save image"))
 		return
 	}
@@ -429,7 +429,7 @@ func ExportImages(w http.ResponseWriter, r *http.Request) {
 		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "unable to close tempfile"))
 		return
 	}
-	if err := runtime.ImageRuntime().SaveImages(r.Context(), images, "docker-archive", tmpfile.Name(), false); err != nil {
+	if err := runtime.ImageRuntime().SaveImages(r.Context(), images, "docker-archive", tmpfile.Name(), false, true); err != nil {
 		utils.InternalServerError(w, err)
 		return
 	}

pkg/api/handlers/libpod/images.go

@@ -206,7 +206,7 @@ func ExportImage(w http.ResponseWriter, r *http.Request) {
 		utils.Error(w, "unknown format", http.StatusInternalServerError, errors.Errorf("unknown format %q", query.Format))
 		return
 	}
-	if err := newImage.Save(r.Context(), name, query.Format, output, []string{}, false, query.Compress); err != nil {
+	if err := newImage.Save(r.Context(), name, query.Format, output, []string{}, false, query.Compress, true); err != nil {
 		utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest, err)
 		return
 	}
@@ -284,6 +284,7 @@ func ExportImages(w http.ResponseWriter, r *http.Request) {
 		Format:            query.Format,
 		MultiImageArchive: true,
 		Output:            output,
+		RemoveSignatures:  true,
 	}
 
 	imageEngine := abi.ImageEngine{Libpod: runtime}

pkg/domain/entities/images.go

@@ -300,6 +300,8 @@ type ImageSaveOptions struct {
 	MultiImageArchive bool
 	// Output - write image to the specified path.
 	Output string
+	// Do not save the signature from the source image
+	RemoveSignatures bool
 	// Quiet - suppress output when copying images
 	Quiet bool
 }

pkg/domain/infra/abi/images.go

@@ -482,13 +482,13 @@ func (ir *ImageEngine) Import(ctx context.Context, opts entities.ImageImportOpti
 func (ir *ImageEngine) Save(ctx context.Context, nameOrID string, tags []string, options entities.ImageSaveOptions) error {
 	if options.MultiImageArchive {
 		nameOrIDs := append([]string{nameOrID}, tags...)
-		return ir.Libpod.ImageRuntime().SaveImages(ctx, nameOrIDs, options.Format, options.Output, options.Quiet)
+		return ir.Libpod.ImageRuntime().SaveImages(ctx, nameOrIDs, options.Format, options.Output, options.Quiet, true)
 	}
 	newImage, err := ir.Libpod.ImageRuntime().NewFromLocal(nameOrID)
 	if err != nil {
 		return err
 	}
-	return newImage.Save(ctx, nameOrID, options.Format, options.Output, tags, options.Quiet, options.Compress)
+	return newImage.Save(ctx, nameOrID, options.Format, options.Output, tags, options.Quiet, options.Compress, true)
 }
 
 func (ir *ImageEngine) Diff(_ context.Context, nameOrID string, _ entities.DiffOptions) (*entities.DiffReport, error) {

pkg/varlinkapi/images.go

@@ -843,7 +843,7 @@ func (i *VarlinkAPI) ImageSave(call iopodman.VarlinkCall, options iopodman.Image
 	saveOutput := bytes.NewBuffer([]byte{})
 	c := make(chan error)
 	go func() {
-		err := newImage.Save(getContext(), options.Name, options.Format, output, options.MoreTags, options.Quiet, options.Compress)
+		err := newImage.Save(getContext(), options.Name, options.Format, output, options.MoreTags, options.Quiet, options.Compress, true)
 		c <- err
 		close(c)
 	}()

test/e2e/save_test.go

@@ -1,8 +1,12 @@
 package integration
 
 import (
+	"io/ioutil"
 	"os"
+	"os/exec"
 	"path/filepath"
+	"strconv"
+	"strings"
 
 	"github.com/containers/podman/v2/pkg/rootless"
 	. "github.com/containers/podman/v2/test/utils"
@@ -116,6 +120,71 @@ var _ = Describe("Podman save", func() {
 		Expect(save).To(ExitWithError())
 	})
 
+	It("podman save remove signature", func() {
+		SkipIfRootless("FIXME: Need get in rootless push sign")
+		if podmanTest.Host.Arch == "ppc64le" {
+			Skip("No registry image for ppc64le")
+		}
+		tempGNUPGHOME := filepath.Join(podmanTest.TempDir, "tmpGPG")
+		err := os.Mkdir(tempGNUPGHOME, os.ModePerm)
+		Expect(err).To(BeNil())
+		origGNUPGHOME := os.Getenv("GNUPGHOME")
+		err = os.Setenv("GNUPGHOME", tempGNUPGHOME)
+		Expect(err).To(BeNil())
+		defer os.Setenv("GNUPGHOME", origGNUPGHOME)
+
+		port := 5000
+		session := podmanTest.Podman([]string{"run", "-d", "--name", "registry", "-p", strings.Join([]string{strconv.Itoa(port), strconv.Itoa(port)}, ":"), "docker.io/registry:2.6"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+		if !WaitContainerReady(podmanTest, "registry", "listening on", 20, 1) {
+			Skip("Cannot start docker registry.")
+		}
+
+		cmd := exec.Command("gpg", "--import", "sign/secret-key.asc")
+		err = cmd.Run()
+		Expect(err).To(BeNil())
+
+		cmd = exec.Command("cp", "/etc/containers/registries.d/default.yaml", "default.yaml")
+		if err = cmd.Run(); err != nil {
+			Skip("no signature store to verify")
+		}
+		defer func() {
+			cmd = exec.Command("cp", "default.yaml", "/etc/containers/registries.d/default.yaml")
+			cmd.Run()
+		}()
+
+		cmd = exec.Command("cp", "sign/key.gpg", "/tmp/key.gpg")
+		Expect(cmd.Run()).To(BeNil())
+		sigstore := `
+default-docker:
+  sigstore: file:///var/lib/containers/sigstore
+  sigstore-staging: file:///var/lib/containers/sigstore
+`
+		Expect(ioutil.WriteFile("/etc/containers/registries.d/default.yaml", []byte(sigstore), 0755)).To(BeNil())
+
+		session = podmanTest.Podman([]string{"tag", ALPINE, "localhost:5000/alpine"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		session = podmanTest.Podman([]string{"push", "--tls-verify=false", "--sign-by", "foo@bar.com", "localhost:5000/alpine"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		session = podmanTest.Podman([]string{"rmi", ALPINE, "localhost:5000/alpine"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		session = podmanTest.Podman([]string{"pull", "--tls-verify=false", "--signature-policy=sign/policy.json", "localhost:5000/alpine"})
+		session.WaitWithDefaultTimeout()
+		Expect(session.ExitCode()).To(Equal(0))
+
+		outfile := filepath.Join(podmanTest.TempDir, "temp.tar")
+		save := podmanTest.Podman([]string{"save", "remove-signatures=true", "-o", outfile, "localhost:5000/alpine"})
+		save.WaitWithDefaultTimeout()
+		Expect(save).To(ExitWithError())
+	})
+
 	It("podman save image with digest reference", func() {
 		// pull a digest reference
 		session := podmanTest.PodmanNoCache([]string{"pull", ALPINELISTDIGEST})

test/e2e/sign/key.gpg

@@ -0,0 +1,30 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+
+mQENBF8kNqwBCAC0x3Kog+WlDNwcR6rWIP8Gj2T6LrQ2/3knSyAWzTgC/OBB6Oh0
+KAokXLjy8J3diG3EaSltE7erGG/bZCz8jYvMiwDJScON4zzidotqjoY80E+NeRDg
+CC0gqvqmh0ftJIjYNBHzSxqrGRQwzwZU+u6ezlE8+0dvsHcHY+MRnxXJQrdM07EP
+Prp85kKckChDlJ1tyGUB/YHieFQmOW5+TERA7ZqQOAQ12Vviv6V4kNfEJJq3MS2c
+csZpO323tcHt3oebqsZCIElhX7uVw6GAeCw1tm4NZXs4g1yIC21Of/hzPeC18F72
+splCgKaAOiE9w/nMGLNEYy2NzgEclZLs2Y7jABEBAAG0FGZvb2JhciA8Zm9vQGJh
+ci5jb20+iQFUBBMBCAA+FiEERyT4ac7LLibByeabqaoHAy6P2bIFAl8kNqwCGwMF
+CQPCZwAFCwkIBwIGFQoJCAsCBBYCAwECHgECF4AACgkQqaoHAy6P2bKtuggAgv54
+/F8wgi+uMrtFr8rqNtZMDyXRxfXaXUy5uGNfqHD83yqxweEqxiA8lmFkRHixPWtg
+Z2MniFXMVc9kVmg8GNIIuzewXrPqtXztvuURQo9phK68v8fXEqqT6K25wtq8TiQZ
+0J3mQIJPPTMe3pCCOyR6+W3iMtQp2AmitxKbzLP3J3GG2i0rG5S147A2rPnzTeMY
+hds819+JE7jNMD7FkV+TcQlOVl4wyOQhNEJcjb6rA6EUe5+s85pIFTBSyPMJpJ03
+Y0dLdcSGpKdncGTK2X9+hS96G1+FP/t8hRIDblqUHtBRXe3Ozz6zSqpqu1DbAQSM
+bIrLYxXfnZEN+ro0dLkBDQRfJDasAQgAncvLLZUHZkJWDPka3ocysJ7+/lmrXyAj
+T3D4r7UM4oaLBOMKjvaKSDw1uW5qYmTxnnsqFDI0O5+XJxD1/0qEf6l2oUpnILdx
+Vruf28FuvymbsyhDgs+MBoHz0jLWWPHUW2oWLIqcvaF0BePQ1GS6UoZlmZejsLww
+cSpbaAHJng7An/iLuqOBr5EdUA5XMXqmdMFDrjh0uZezImJ2Eacu/hshBdu3IY49
+J5XP18GWrSdUnP27cv3tOii9j5Lfl8QAvCN89vkALIU3eZtnMlWZqLgl5o6COVFm
+zpyx+iHOoCznQBt0aGoSNmE/dAqWIQS/xCSFqMHI6kNd9N0oR0rEHwARAQABiQE8
+BBgBCAAmFiEERyT4ac7LLibByeabqaoHAy6P2bIFAl8kNqwCGwwFCQPCZwAACgkQ
+qaoHAy6P2bJfjQgAje6YR+p1QaNlTN9l4t2kGzy9RhkfYMrTgI2fEqbS9bFJUy3Y
+3mH+vj/r2gN/kaN8LHH4K1d7fAohBsFqSI0flzHHIx2rfti9zAlbXcAErbnG+f0f
+k0AaqU7KelU35vjPfNe6Vn7ky6G9CC6jW04NkLZDNFA2GusdYf1aM0LWew5t4WZa
+quLVFhL36q9eHaogO/fcPR/quvQefHokk+b541ytwMN9l/g43rTbCvAjrUDHwipb
+Gbw91Wg2XjbecRiCXDKWds2M149BpxUzY5xHFtD5t5WSEE/SkkryGTMmTxS3tuQZ
+9PdtCPGrNDO6Ts/amORF04Tf+YMJgfv3IWxMeQ==
+=y0uZ
+-----END PGP PUBLIC KEY BLOCK-----

test/e2e/sign/policy.json

@@ -0,0 +1,18 @@
+{
+    "default": [
+        {
+            "type": "insecureAcceptAnything"
+        }
+    ],
+    "transports": {
+        "docker": {
+            "localhost:5000": [
+                {
+                    "type": "signedBy",
+                    "keyType": "GPGKeys",
+                    "keyPath": "/tmp/key.gpg"
+                }
+            ]
+        }
+    }
+}