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moby--moby/integration-cli/docker_cli_cp_test.go

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package main
import (
"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"testing"
)
const (
cpTestPathParent = "/some"
cpTestPath = "/some/path"
cpTestName = "test"
cpFullPath = "/some/path/test"
cpContainerContents = "holla, i am the container"
cpHostContents = "hello, i am the host"
)
// Test for #5656
// Check that garbage paths don't escape the container's rootfs
func TestCpGarbagePath(t *testing.T) {
out, exitCode, err := cmd(t, "run", "-d", "busybox", "/bin/sh", "-c", "mkdir -p '"+cpTestPath+"' && echo -n '"+cpContainerContents+"' > "+cpFullPath)
if err != nil || exitCode != 0 {
t.Fatal("failed to create a container", out, err)
}
cleanedContainerID := stripTrailingCharacters(out)
defer deleteContainer(cleanedContainerID)
out, _, err = cmd(t, "wait", cleanedContainerID)
if err != nil || stripTrailingCharacters(out) != "0" {
t.Fatal("failed to set up container", out, err)
}
if err := os.MkdirAll(cpTestPath, os.ModeDir); err != nil {
t.Fatal(err)
}
hostFile, err := os.Create(cpFullPath)
if err != nil {
t.Fatal(err)
}
defer hostFile.Close()
defer os.RemoveAll(cpTestPathParent)
fmt.Fprintf(hostFile, "%s", cpHostContents)
tmpdir, err := ioutil.TempDir("", "docker-integration")
if err != nil {
t.Fatal(err)
}
tmpname := filepath.Join(tmpdir, cpTestName)
defer os.RemoveAll(tmpdir)
path := filepath.Join("../../../../../../../../../../../../", cpFullPath)
_, _, err = cmd(t, "cp", cleanedContainerID+":"+path, tmpdir)
if err != nil {
t.Fatalf("couldn't copy from garbage path: %s:%s %s", cleanedContainerID, path, err)
}
file, _ := os.Open(tmpname)
defer file.Close()
test, err := ioutil.ReadAll(file)
if err != nil {
t.Fatal(err)
}
if string(test) == cpHostContents {
t.Errorf("output matched host file -- garbage path can escape container rootfs")
}
if string(test) != cpContainerContents {
t.Errorf("output doesn't match the input for garbage path")
}
logDone("cp - garbage paths relative to container's rootfs")
}
// Check that relative paths are relative to the container's rootfs
func TestCpRelativePath(t *testing.T) {
out, exitCode, err := cmd(t, "run", "-d", "busybox", "/bin/sh", "-c", "mkdir -p '"+cpTestPath+"' && echo -n '"+cpContainerContents+"' > "+cpFullPath)
if err != nil || exitCode != 0 {
t.Fatal("failed to create a container", out, err)
}
cleanedContainerID := stripTrailingCharacters(out)
defer deleteContainer(cleanedContainerID)
out, _, err = cmd(t, "wait", cleanedContainerID)
if err != nil || stripTrailingCharacters(out) != "0" {
t.Fatal("failed to set up container", out, err)
}
if err := os.MkdirAll(cpTestPath, os.ModeDir); err != nil {
t.Fatal(err)
}
hostFile, err := os.Create(cpFullPath)
if err != nil {
t.Fatal(err)
}
defer hostFile.Close()
defer os.RemoveAll(cpTestPathParent)
fmt.Fprintf(hostFile, "%s", cpHostContents)
tmpdir, err := ioutil.TempDir("", "docker-integration")
if err != nil {
t.Fatal(err)
}
tmpname := filepath.Join(tmpdir, cpTestName)
defer os.RemoveAll(tmpdir)
path, _ := filepath.Rel("/", cpFullPath)
_, _, err = cmd(t, "cp", cleanedContainerID+":"+path, tmpdir)
if err != nil {
t.Fatalf("couldn't copy from relative path: %s:%s %s", cleanedContainerID, path, err)
}
file, _ := os.Open(tmpname)
defer file.Close()
test, err := ioutil.ReadAll(file)
if err != nil {
t.Fatal(err)
}
if string(test) == cpHostContents {
t.Errorf("output matched host file -- relative path can escape container rootfs")
}
if string(test) != cpContainerContents {
t.Errorf("output doesn't match the input for relative path")
}
logDone("cp - relative paths relative to container's rootfs")
}
// Check that absolute paths are relative to the container's rootfs
func TestCpAbsolutePath(t *testing.T) {
out, exitCode, err := cmd(t, "run", "-d", "busybox", "/bin/sh", "-c", "mkdir -p '"+cpTestPath+"' && echo -n '"+cpContainerContents+"' > "+cpFullPath)
if err != nil || exitCode != 0 {
t.Fatal("failed to create a container", out, err)
}
cleanedContainerID := stripTrailingCharacters(out)
defer deleteContainer(cleanedContainerID)
out, _, err = cmd(t, "wait", cleanedContainerID)
if err != nil || stripTrailingCharacters(out) != "0" {
t.Fatal("failed to set up container", out, err)
}
if err := os.MkdirAll(cpTestPath, os.ModeDir); err != nil {
t.Fatal(err)
}
hostFile, err := os.Create(cpFullPath)
if err != nil {
t.Fatal(err)
}
defer hostFile.Close()
defer os.RemoveAll(cpTestPathParent)
fmt.Fprintf(hostFile, "%s", cpHostContents)
tmpdir, err := ioutil.TempDir("", "docker-integration")
if err != nil {
t.Fatal(err)
}
tmpname := filepath.Join(tmpdir, cpTestName)
defer os.RemoveAll(tmpdir)
path := cpFullPath
_, _, err = cmd(t, "cp", cleanedContainerID+":"+path, tmpdir)
if err != nil {
t.Fatalf("couldn't copy from absolute path: %s:%s %s", cleanedContainerID, path, err)
}
file, _ := os.Open(tmpname)
defer file.Close()
test, err := ioutil.ReadAll(file)
if err != nil {
t.Fatal(err)
}
if string(test) == cpHostContents {
t.Errorf("output matched host file -- absolute path can escape container rootfs")
}
if string(test) != cpContainerContents {
t.Errorf("output doesn't match the input for absolute path")
}
logDone("cp - absolute paths relative to container's rootfs")
}
// Test for #5619
// Check that absolute symlinks are still relative to the container's rootfs
func TestCpAbsoluteSymlink(t *testing.T) {
out, exitCode, err := cmd(t, "run", "-d", "busybox", "/bin/sh", "-c", "mkdir -p '"+cpTestPath+"' && echo -n '"+cpContainerContents+"' > "+cpFullPath+" && ln -s "+cpFullPath+" container_path")
if err != nil || exitCode != 0 {
t.Fatal("failed to create a container", out, err)
}
cleanedContainerID := stripTrailingCharacters(out)
defer deleteContainer(cleanedContainerID)
out, _, err = cmd(t, "wait", cleanedContainerID)
if err != nil || stripTrailingCharacters(out) != "0" {
t.Fatal("failed to set up container", out, err)
}
if err := os.MkdirAll(cpTestPath, os.ModeDir); err != nil {
t.Fatal(err)
}
hostFile, err := os.Create(cpFullPath)
if err != nil {
t.Fatal(err)
}
defer hostFile.Close()
defer os.RemoveAll(cpTestPathParent)
fmt.Fprintf(hostFile, "%s", cpHostContents)
tmpdir, err := ioutil.TempDir("", "docker-integration")
if err != nil {
t.Fatal(err)
}
tmpname := filepath.Join(tmpdir, cpTestName)
defer os.RemoveAll(tmpdir)
path := filepath.Join("/", "container_path")
_, _, err = cmd(t, "cp", cleanedContainerID+":"+path, tmpdir)
if err != nil {
t.Fatalf("couldn't copy from absolute path: %s:%s %s", cleanedContainerID, path, err)
}
file, _ := os.Open(tmpname)
defer file.Close()
test, err := ioutil.ReadAll(file)
if err != nil {
t.Fatal(err)
}
if string(test) == cpHostContents {
t.Errorf("output matched host file -- absolute symlink can escape container rootfs")
}
if string(test) != cpContainerContents {
t.Errorf("output doesn't match the input for absolute symlink")
}
logDone("cp - absolute symlink relative to container's rootfs")
}
// Test for #5619
// Check that symlinks which are part of the resource path are still relative to the container's rootfs
func TestCpSymlinkComponent(t *testing.T) {
out, exitCode, err := cmd(t, "run", "-d", "busybox", "/bin/sh", "-c", "mkdir -p '"+cpTestPath+"' && echo -n '"+cpContainerContents+"' > "+cpFullPath+" && ln -s "+cpTestPath+" container_path")
if err != nil || exitCode != 0 {
t.Fatal("failed to create a container", out, err)
}
cleanedContainerID := stripTrailingCharacters(out)
defer deleteContainer(cleanedContainerID)
out, _, err = cmd(t, "wait", cleanedContainerID)
if err != nil || stripTrailingCharacters(out) != "0" {
t.Fatal("failed to set up container", out, err)
}
if err := os.MkdirAll(cpTestPath, os.ModeDir); err != nil {
t.Fatal(err)
}
hostFile, err := os.Create(cpFullPath)
if err != nil {
t.Fatal(err)
}
defer hostFile.Close()
defer os.RemoveAll(cpTestPathParent)
fmt.Fprintf(hostFile, "%s", cpHostContents)
tmpdir, err := ioutil.TempDir("", "docker-integration")
if err != nil {
t.Fatal(err)
}
tmpname := filepath.Join(tmpdir, cpTestName)
defer os.RemoveAll(tmpdir)
path := filepath.Join("/", "container_path", cpTestName)
_, _, err = cmd(t, "cp", cleanedContainerID+":"+path, tmpdir)
if err != nil {
t.Fatalf("couldn't copy from symlink path component: %s:%s %s", cleanedContainerID, path, err)
}
file, _ := os.Open(tmpname)
defer file.Close()
test, err := ioutil.ReadAll(file)
if err != nil {
t.Fatal(err)
}
if string(test) == cpHostContents {
t.Errorf("output matched host file -- symlink path component can escape container rootfs")
}
if string(test) != cpContainerContents {
t.Errorf("output doesn't match the input for symlink path component")
}
logDone("cp - symlink path components relative to container's rootfs")
}
// Check that cp with unprivileged user doesn't return any error
func TestCpUnprivilegedUser(t *testing.T) {
out, exitCode, err := cmd(t, "run", "-d", "busybox", "/bin/sh", "-c", "touch "+cpTestName)
if err != nil || exitCode != 0 {
t.Fatal("failed to create a container", out, err)
}
cleanedContainerID := stripTrailingCharacters(out)
defer deleteContainer(cleanedContainerID)
out, _, err = cmd(t, "wait", cleanedContainerID)
if err != nil || stripTrailingCharacters(out) != "0" {
t.Fatal("failed to set up container", out, err)
}
tmpdir, err := ioutil.TempDir("", "docker-integration")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
if err = os.Chmod(tmpdir, 0777); err != nil {
t.Fatal(err)
}
path := cpTestName
_, _, err = runCommandWithOutput(exec.Command("su", "unprivilegeduser", "-c", dockerBinary+" cp "+cleanedContainerID+":"+path+" "+tmpdir))
if err != nil {
t.Fatalf("couldn't copy with unprivileged user: %s:%s %s", cleanedContainerID, path, err)
}
logDone("cp - unprivileged user")
}