forked from containers/image
/
sign_test.go
103 lines (90 loc) · 3.74 KB
/
sign_test.go
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package copy
import (
"context"
"io"
"testing"
"github.com/containers/image/v5/directory"
"github.com/containers/image/v5/docker"
"github.com/containers/image/v5/internal/imagedestination"
internalsig "github.com/containers/image/v5/internal/signature"
"github.com/containers/image/v5/manifest"
"github.com/containers/image/v5/signature"
"github.com/containers/image/v5/types"
"github.com/docker/distribution/reference"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
const (
testGPGHomeDirectory = "../signature/fixtures"
// TestKeyFingerprint is the fingerprint of the private key in testGPGHomeDirectory.
// Keep this in sync with signature/fixtures_info_test.go
testKeyFingerprint = "1D8230F6CDB6A06716E414C1DB72F2188BB46CC8"
)
func TestCreateSignature(t *testing.T) {
manifestBlob := []byte("Something")
manifestDigest, err := manifest.Digest(manifestBlob)
require.NoError(t, err)
mech, _, err := signature.NewEphemeralGPGSigningMechanism([]byte{})
require.NoError(t, err)
defer mech.Close()
if err := mech.SupportsSigning(); err != nil {
t.Skipf("Signing not supported: %v", err)
}
t.Setenv("GNUPGHOME", testGPGHomeDirectory)
// Signing a directory: reference, which does not have a DockerReference(), fails.
tempDir := t.TempDir()
dirRef, err := directory.NewReference(tempDir)
require.NoError(t, err)
dirDest, err := dirRef.NewImageDestination(context.Background(), nil)
require.NoError(t, err)
defer dirDest.Close()
c := &copier{
dest: imagedestination.FromPublic(dirDest),
reportWriter: io.Discard,
}
_, err = c.createSignature(manifestBlob, testKeyFingerprint, "", nil)
assert.Error(t, err)
// Set up a docker: reference
dockerRef, err := docker.ParseReference("//busybox")
require.NoError(t, err)
dockerDest, err := dockerRef.NewImageDestination(context.Background(),
&types.SystemContext{RegistriesDirPath: "/this/does/not/exist", DockerPerHostCertDirPath: "/this/does/not/exist"})
require.NoError(t, err)
defer dockerDest.Close()
c = &copier{
dest: imagedestination.FromPublic(dockerDest),
reportWriter: io.Discard,
}
// Signing with an unknown key fails
_, err = c.createSignature(manifestBlob, "this key does not exist", "", nil)
assert.Error(t, err)
// Can't sign without a full reference
ref, err := reference.ParseNamed("myregistry.io/myrepo")
require.NoError(t, err)
_, err = c.createSignature(manifestBlob, testKeyFingerprint, "", ref)
assert.Error(t, err)
// Mechanism for verifying the signatures
mech, err = signature.NewGPGSigningMechanism()
require.NoError(t, err)
defer mech.Close()
// Signing without overriding the identity uses the docker reference
sig, err := c.createSignature(manifestBlob, testKeyFingerprint, "", nil)
require.NoError(t, err)
simpleSig, ok := sig.(internalsig.SimpleSigning)
require.True(t, ok)
verified, err := signature.VerifyDockerManifestSignature(simpleSig.UntrustedSignature(), manifestBlob, "docker.io/library/busybox:latest", mech, testKeyFingerprint)
require.NoError(t, err)
assert.Equal(t, "docker.io/library/busybox:latest", verified.DockerReference)
assert.Equal(t, manifestDigest, verified.DockerManifestDigest)
// Can override the identity with own
ref, err = reference.ParseNamed("myregistry.io/myrepo:mytag")
require.NoError(t, err)
sig, err = c.createSignature(manifestBlob, testKeyFingerprint, "", ref)
require.NoError(t, err)
simpleSig, ok = sig.(internalsig.SimpleSigning)
require.True(t, ok)
verified, err = signature.VerifyDockerManifestSignature(simpleSig.UntrustedSignature(), manifestBlob, "myregistry.io/myrepo:mytag", mech, testKeyFingerprint)
require.NoError(t, err)
assert.Equal(t, "myregistry.io/myrepo:mytag", verified.DockerReference)
assert.Equal(t, manifestDigest, verified.DockerManifestDigest)
}