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|
//go:build dfrunsecurity
package dockerfile
import (
"testing"
"github.com/containerd/continuity/fs/fstest"
"github.com/moby/buildkit/client"
"github.com/moby/buildkit/frontend/dockerui"
"github.com/moby/buildkit/util/entitlements"
"github.com/moby/buildkit/util/testutil/integration"
"github.com/stretchr/testify/require"
"github.com/tonistiigi/fsutil"
)
var runSecurityTests = integration.TestFuncs(
testRunSecurityInsecure,
testRunSecuritySandbox,
testRunSecurityDefault,
testInsecureDevicesWhitelist,
)
func init() {
securityOpts = []integration.TestOpt{
integration.WithMirroredImages(integration.OfficialImages("alpine:latest")),
integration.WithMirroredImages(map[string]string{
"tonistiigi/hellofs:latest": "docker.io/tonistiigi/hellofs:latest",
}),
}
securityTests = append(securityTests, runSecurityTests...)
}
func testInsecureDevicesWhitelist(t *testing.T, sb integration.Sandbox) {
if sb.Rootless() {
t.SkipNow()
}
f := getFrontend(t, sb)
dockerfile := []byte(`
FROM alpine
RUN apk add --no-cache fuse e2fsprogs
RUN [ ! -e /dev/fuse ] && [ ! -e /dev/loop-control ]
# https://github.com/bazil/fuse/blob/master/examples/hellofs/hello.go#L91
COPY --from=tonistiigi/hellofs /hellofs /bin/hellofs
RUN --security=insecure [ -c /dev/fuse ] && [ -c /dev/loop-control ]
RUN --security=insecure dmesg > /dev/null
# testing fuse
RUN --security=insecure hellofs /mnt & sleep 1 && ls -l /mnt && mount && cat /mnt/hello
# testing loopbacks
RUN --security=insecure ls -l /dev && dd if=/dev/zero of=disk.img bs=20M count=1 && \
mkfs.ext4 disk.img && \
mount -o loop disk.img /mnt && touch /mnt/foo \
umount /mnt && \
rm disk.img
`)
dir := integration.Tmpdir(
t,
fstest.CreateFile("Dockerfile", dockerfile, 0600),
)
c, err := client.New(sb.Context(), sb.Address())
require.NoError(t, err)
defer c.Close()
_, err = f.Solve(sb.Context(), c, client.SolveOpt{
LocalMounts: map[string]fsutil.FS{
dockerui.DefaultLocalNameDockerfile: dir,
dockerui.DefaultLocalNameContext: dir,
},
AllowedEntitlements: []entitlements.Entitlement{entitlements.EntitlementSecurityInsecure},
}, nil)
secMode := sb.Value("security.insecure")
switch secMode {
case securityInsecureGranted:
require.NoError(t, err)
case securityInsecureDenied:
require.Error(t, err)
require.Contains(t, err.Error(), "entitlement security.insecure is not allowed")
default:
require.Fail(t, "unexpected secmode")
}
}
func testRunSecurityInsecure(t *testing.T, sb integration.Sandbox) {
f := getFrontend(t, sb)
dockerfile := []byte(`
FROM busybox
RUN --security=insecure [ "$(printf '%x' $(( $(cat /proc/self/status | grep CapBnd | cut -f 2 | sed s#^#0x#) & 0x3fffffffff)))" == "3fffffffff" ]
RUN [ "$(cat /proc/self/status | grep CapBnd)" == "CapBnd: 00000000a80425fb" ]
`)
dir := integration.Tmpdir(
t,
fstest.CreateFile("Dockerfile", dockerfile, 0600),
)
c, err := client.New(sb.Context(), sb.Address())
require.NoError(t, err)
defer c.Close()
_, err = f.Solve(sb.Context(), c, client.SolveOpt{
LocalMounts: map[string]fsutil.FS{
dockerui.DefaultLocalNameDockerfile: dir,
dockerui.DefaultLocalNameContext: dir,
},
AllowedEntitlements: []entitlements.Entitlement{entitlements.EntitlementSecurityInsecure},
}, nil)
secMode := sb.Value("security.insecure")
switch secMode {
case securityInsecureGranted:
require.NoError(t, err)
case securityInsecureDenied:
require.Error(t, err)
require.Contains(t, err.Error(), "entitlement security.insecure is not allowed")
default:
require.Fail(t, "unexpected secmode")
}
}
func testRunSecuritySandbox(t *testing.T, sb integration.Sandbox) {
f := getFrontend(t, sb)
dockerfile := []byte(`
FROM busybox
RUN --security=sandbox [ "$(cat /proc/self/status | grep CapBnd)" == "CapBnd: 00000000a80425fb" ]
`)
dir := integration.Tmpdir(
t,
fstest.CreateFile("Dockerfile", dockerfile, 0600),
)
c, err := client.New(sb.Context(), sb.Address())
require.NoError(t, err)
defer c.Close()
_, err = f.Solve(sb.Context(), c, client.SolveOpt{
LocalMounts: map[string]fsutil.FS{
dockerui.DefaultLocalNameDockerfile: dir,
dockerui.DefaultLocalNameContext: dir,
},
}, nil)
require.NoError(t, err)
}
func testRunSecurityDefault(t *testing.T, sb integration.Sandbox) {
f := getFrontend(t, sb)
dockerfile := []byte(`
FROM busybox
RUN [ "$(cat /proc/self/status | grep CapBnd)" == "CapBnd: 00000000a80425fb" ]
`)
dir := integration.Tmpdir(
t,
fstest.CreateFile("Dockerfile", dockerfile, 0600),
)
c, err := client.New(sb.Context(), sb.Address())
require.NoError(t, err)
defer c.Close()
_, err = f.Solve(sb.Context(), c, client.SolveOpt{
LocalMounts: map[string]fsutil.FS{
dockerui.DefaultLocalNameDockerfile: dir,
dockerui.DefaultLocalNameContext: dir,
},
AllowedEntitlements: []entitlements.Entitlement{entitlements.EntitlementSecurityInsecure},
}, nil)
secMode := sb.Value("security.insecure")
switch secMode {
case securityInsecureGranted:
require.NoError(t, err)
case securityInsecureDenied:
require.Error(t, err)
require.Contains(t, err.Error(), "entitlement security.insecure is not allowed")
default:
require.Fail(t, "unexpected secmode")
}
}
|
