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package integration
import (
"os"
"strconv"
"strings"
. "github.com/containers/podman/v3/test/utils"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
. "github.com/onsi/gomega/gexec"
"github.com/syndtr/gocapability/capability"
)
// helper function for confirming that container capabilities are equal
// to those of the host, but only to the extent of caps we (podman)
// know about at compile time. That is: the kernel may have more caps
// available than we are aware of, leading to host=FFF... and ctr=3FF...
// because the latter is all we request. Accept that.
func containerCapMatchesHost(ctrCap string, hostCap string) {
if isRootless() {
return
}
ctrCapN, err := strconv.ParseUint(ctrCap, 16, 64)
Expect(err).NotTo(HaveOccurred(), "Error parsing %q as hex", ctrCap)
hostCapN, err := strconv.ParseUint(hostCap, 16, 64)
Expect(err).NotTo(HaveOccurred(), "Error parsing %q as hex", hostCap)
// host caps can never be zero (except rootless).
// and host caps must always be a superset (inclusive) of container
Expect(hostCapN).To(BeNumerically(">", 0), "host cap %q should be nonzero", hostCap)
Expect(hostCapN).To(BeNumerically(">=", ctrCapN), "host cap %q should never be less than container cap %q", hostCap, ctrCap)
hostCapMasked := hostCapN & (1<<len(capability.List()) - 1)
Expect(ctrCapN).To(Equal(hostCapMasked), "container cap %q is not a subset of host cap %q", ctrCap, hostCap)
}
var _ = Describe("Podman privileged container tests", func() {
var (
tempdir string
err error
podmanTest *PodmanTestIntegration
)
BeforeEach(func() {
tempdir, err = CreateTempDirInTempDir()
if err != nil {
os.Exit(1)
}
podmanTest = PodmanTestCreate(tempdir)
podmanTest.Setup()
podmanTest.SeedImages()
})
AfterEach(func() {
podmanTest.Cleanup()
f := CurrentGinkgoTestDescription()
processTestResult(f)
})
It("podman privileged make sure sys is mounted rw", func() {
session := podmanTest.Podman([]string{"run", "--privileged", BB, "mount"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
ok, lines := session.GrepString("sysfs")
Expect(ok).To(BeTrue())
Expect(lines[0]).To(ContainSubstring("sysfs (rw,"))
})
It("podman privileged CapEff", func() {
hostCap := SystemExec("awk", []string{"/^CapEff/ { print $2 }", "/proc/self/status"})
Expect(hostCap).Should(Exit(0))
session := podmanTest.Podman([]string{"run", "--privileged", BB, "awk", "/^CapEff/ { print $2 }", "/proc/self/status"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
containerCapMatchesHost(session.OutputToString(), hostCap.OutputToString())
})
It("podman cap-add CapEff", func() {
// Get caps of current process
hostCap := SystemExec("awk", []string{"/^CapEff/ { print $2 }", "/proc/self/status"})
Expect(hostCap).Should(Exit(0))
session := podmanTest.Podman([]string{"run", "--cap-add", "all", BB, "awk", "/^CapEff/ { print $2 }", "/proc/self/status"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
containerCapMatchesHost(session.OutputToString(), hostCap.OutputToString())
})
It("podman cap-add CapEff with --user", func() {
// Get caps of current process
hostCap := SystemExec("awk", []string{"/^CapEff/ { print $2 }", "/proc/self/status"})
Expect(hostCap).Should(Exit(0))
session := podmanTest.Podman([]string{"run", "--user=bin", "--cap-add", "all", BB, "awk", "/^CapEff/ { print $2 }", "/proc/self/status"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
containerCapMatchesHost(session.OutputToString(), hostCap.OutputToString())
})
It("podman cap-drop CapEff", func() {
session := podmanTest.Podman([]string{"run", "--cap-drop", "all", BB, "grep", "CapEff", "/proc/self/status"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
capEff := strings.Split(session.OutputToString(), " ")
Expect("0000000000000000").To(Equal(capEff[1]))
})
It("podman privileged should disable seccomp by default", func() {
hostSeccomp := SystemExec("grep", []string{"-Ei", "^Seccomp:\\s+0$", "/proc/self/status"})
Expect(hostSeccomp).Should(Exit(0))
session := podmanTest.Podman([]string{"run", "--privileged", ALPINE, "grep", "-Ei", "^Seccomp:\\s+0$", "/proc/self/status"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
})
It("podman non-privileged should have very few devices", func() {
session := podmanTest.Podman([]string{"run", "-t", BB, "ls", "-l", "/dev"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
Expect(len(session.OutputToStringArray())).To(Equal(17))
})
It("podman privileged should inherit host devices", func() {
session := podmanTest.Podman([]string{"run", "--privileged", ALPINE, "ls", "-l", "/dev"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
Expect(len(session.OutputToStringArray())).To(BeNumerically(">", 20))
})
It("run no-new-privileges test", func() {
// Check if our kernel is new enough
k, err := IsKernelNewerThan("4.14")
Expect(err).To(BeNil())
if !k {
Skip("Kernel is not new enough to test this feature")
}
cap := SystemExec("grep", []string{"NoNewPrivs", "/proc/self/status"})
if cap.ExitCode() != 0 {
Skip("Can't determine NoNewPrivs")
}
session := podmanTest.Podman([]string{"run", BB, "grep", "NoNewPrivs", "/proc/self/status"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
privs := strings.Split(session.OutputToString(), ":")
session = podmanTest.Podman([]string{"run", "--security-opt", "no-new-privileges", BB, "grep", "NoNewPrivs", "/proc/self/status"})
session.WaitWithDefaultTimeout()
Expect(session).Should(Exit(0))
noprivs := strings.Split(session.OutputToString(), ":")
Expect(privs[1]).To(Not(Equal(noprivs[1])))
})
})
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