Bump github.com/containers/common from 0.6.1 to 0.8.0

Bumps [github.com/containers/common](https://github.com/containers/common) from 0.6.1 to 0.8.0.
- [Release notes](https://github.com/containers/common/releases)
- [Commits](https://github.com/containers/common/compare/v0.6.1...v0.8.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

vendor/github.com/containers/common/pkg/apparmor/apparmor.go

@@ -0,0 +1,21 @@
+package apparmor
+
+import (
+	"errors"
+)
+
+const (
+	// ProfilePrefix is used for version-independent presence checks.
+	ProfilePrefix = "apparmor_profile"
+
+	// Profile default name
+	Profile = "container-default"
+)
+
+var (
+
+	// ErrApparmorUnsupported indicates that AppArmor support is not supported.
+	ErrApparmorUnsupported = errors.New("AppArmor is not supported")
+	// ErrApparmorRootless indicates that AppArmor support is not supported in rootless mode.
+	ErrApparmorRootless = errors.New("AppArmor is not supported in rootless mode")
+)

vendor/github.com/containers/common/pkg/apparmor/apparmor_linux.go

@@ -0,0 +1,289 @@
+// +build linux,apparmor
+
+package apparmor
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"path"
+	"strconv"
+	"strings"
+	"text/template"
+
+	"github.com/containers/storage/pkg/unshare"
+	runcaa "github.com/opencontainers/runc/libcontainer/apparmor"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+)
+
+// profileDirectory is the file store for apparmor profiles and macros.
+var profileDirectory = "/etc/apparmor.d"
+
+// IsEnabled returns true if AppArmor is enabled on the host.
+func IsEnabled() bool {
+	if unshare.IsRootless() {
+		return false
+	}
+	return runcaa.IsEnabled()
+}
+
+// profileData holds information about the given profile for generation.
+type profileData struct {
+	// Name is profile name.
+	Name string
+	// Imports defines the apparmor functions to import, before defining the profile.
+	Imports []string
+	// InnerImports defines the apparmor functions to import in the profile.
+	InnerImports []string
+	// Version is the {major, minor, patch} version of apparmor_parser as a single number.
+	Version int
+}
+
+// generateDefault creates an apparmor profile from ProfileData.
+func (p *profileData) generateDefault(out io.Writer) error {
+	compiled, err := template.New("apparmor_profile").Parse(defaultProfileTemplate)
+	if err != nil {
+		return err
+	}
+
+	if macroExists("tunables/global") {
+		p.Imports = append(p.Imports, "#include <tunables/global>")
+	} else {
+		p.Imports = append(p.Imports, "@{PROC}=/proc/")
+	}
+
+	if macroExists("abstractions/base") {
+		p.InnerImports = append(p.InnerImports, "#include <abstractions/base>")
+	}
+
+	ver, err := getAAParserVersion()
+	if err != nil {
+		return err
+	}
+	p.Version = ver
+
+	return compiled.Execute(out, p)
+}
+
+// macrosExists checks if the passed macro exists.
+func macroExists(m string) bool {
+	_, err := os.Stat(path.Join(profileDirectory, m))
+	return err == nil
+}
+
+// InstallDefault generates a default profile and loads it into the kernel
+// using 'apparmor_parser'.
+func InstallDefault(name string) error {
+	if unshare.IsRootless() {
+		return ErrApparmorRootless
+	}
+
+	p := profileData{
+		Name: name,
+	}
+
+	cmd := exec.Command("apparmor_parser", "-Kr")
+	pipe, err := cmd.StdinPipe()
+	if err != nil {
+		return err
+	}
+	if err := cmd.Start(); err != nil {
+		if pipeErr := pipe.Close(); pipeErr != nil {
+			logrus.Errorf("unable to close apparmor pipe: %q", pipeErr)
+		}
+		return err
+	}
+	if err := p.generateDefault(pipe); err != nil {
+		if pipeErr := pipe.Close(); pipeErr != nil {
+			logrus.Errorf("unable to close apparmor pipe: %q", pipeErr)
+		}
+		if cmdErr := cmd.Wait(); cmdErr != nil {
+			logrus.Errorf("unable to wait for apparmor command: %q", cmdErr)
+		}
+		return err
+	}
+
+	if pipeErr := pipe.Close(); pipeErr != nil {
+		logrus.Errorf("unable to close apparmor pipe: %q", pipeErr)
+	}
+	return cmd.Wait()
+}
+
+// DefaultContent returns the default profile content as byte slice. The
+// profile is named as the provided `name`. The function errors if the profile
+// generation fails.
+func DefaultContent(name string) ([]byte, error) {
+	p := profileData{Name: name}
+	var bytes bytes.Buffer
+	if err := p.generateDefault(&bytes); err != nil {
+		return nil, err
+	}
+	return bytes.Bytes(), nil
+}
+
+// IsLoaded checks if a profile with the given name has been loaded into the
+// kernel.
+func IsLoaded(name string) (bool, error) {
+	if name != "" && unshare.IsRootless() {
+		return false, errors.Wrapf(ErrApparmorRootless, "cannot load AppArmor profile %q", name)
+	}
+
+	file, err := os.Open("/sys/kernel/security/apparmor/profiles")
+	if err != nil {
+		if os.IsNotExist(err) {
+			return false, nil
+		}
+		return false, err
+	}
+	defer file.Close()
+
+	r := bufio.NewReader(file)
+	for {
+		p, err := r.ReadString('\n')
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return false, err
+		}
+		if strings.HasPrefix(p, name+" ") {
+			return true, nil
+		}
+	}
+
+	return false, nil
+}
+
+// execAAParser runs `apparmor_parser` with the passed arguments.
+func execAAParser(dir string, args ...string) (string, error) {
+	c := exec.Command("apparmor_parser", args...)
+	c.Dir = dir
+
+	output, err := c.CombinedOutput()
+	if err != nil {
+		return "", fmt.Errorf("running `%s %s` failed with output: %s\nerror: %v", c.Path, strings.Join(c.Args, " "), output, err)
+	}
+
+	return string(output), nil
+}
+
+// getAAParserVersion returns the major and minor version of apparmor_parser.
+func getAAParserVersion() (int, error) {
+	output, err := execAAParser("", "--version")
+	if err != nil {
+		return -1, err
+	}
+	return parseAAParserVersion(output)
+}
+
+// parseAAParserVersion parses the given `apparmor_parser --version` output and
+// returns the major and minor version number as an integer.
+func parseAAParserVersion(output string) (int, error) {
+	// output is in the form of the following:
+	// AppArmor parser version 2.9.1
+	// Copyright (C) 1999-2008 Novell Inc.
+	// Copyright 2009-2012 Canonical Ltd.
+	lines := strings.SplitN(output, "\n", 2)
+	words := strings.Split(lines[0], " ")
+	version := words[len(words)-1]
+
+	// split by major minor version
+	v := strings.Split(version, ".")
+	if len(v) == 0 || len(v) > 3 {
+		return -1, fmt.Errorf("parsing version failed for output: `%s`", output)
+	}
+
+	// Default the versions to 0.
+	var majorVersion, minorVersion, patchLevel int
+
+	majorVersion, err := strconv.Atoi(v[0])
+	if err != nil {
+		return -1, err
+	}
+
+	if len(v) > 1 {
+		minorVersion, err = strconv.Atoi(v[1])
+		if err != nil {
+			return -1, err
+		}
+	}
+	if len(v) > 2 {
+		patchLevel, err = strconv.Atoi(v[2])
+		if err != nil {
+			return -1, err
+		}
+	}
+
+	// major*10^5 + minor*10^3 + patch*10^0
+	numericVersion := majorVersion*1e5 + minorVersion*1e3 + patchLevel
+	return numericVersion, nil
+
+}
+
+// CheckProfileAndLoadDefault checks if the specified profile is loaded and
+// loads the DefaultLibpodProfile if the specified on is prefixed by
+// DefaultLipodProfilePrefix.  This allows to always load and apply the latest
+// default AppArmor profile.  Note that AppArmor requires root.  If it's a
+// default profile, return DefaultLipodProfilePrefix, otherwise the specified
+// one.
+func CheckProfileAndLoadDefault(name string) (string, error) {
+	if name == "unconfined" {
+		return name, nil
+	}
+
+	// AppArmor is not supported in rootless mode as it requires root
+	// privileges.  Return an error in case a specific profile is specified.
+	if unshare.IsRootless() {
+		if name != "" {
+			return "", errors.Wrapf(ErrApparmorRootless, "cannot load AppArmor profile %q", name)
+		} else {
+			logrus.Debug("skipping loading default AppArmor profile (rootless mode)")
+			return "", nil
+		}
+	}
+
+	// Check if AppArmor is disabled and error out if a profile is to be set.
+	if !runcaa.IsEnabled() {
+		if name == "" {
+			return "", nil
+		} else {
+			return "", fmt.Errorf("profile %q specified but AppArmor is disabled on the host", name)
+		}
+	}
+
+	// If the specified name is not empty or is not a default libpod one,
+	// ignore it and return the name.
+	if name != "" && !strings.HasPrefix(name, ProfilePrefix) {
+		isLoaded, err := IsLoaded(name)
+		if err != nil {
+			return "", err
+		}
+		if !isLoaded {
+			return "", fmt.Errorf("AppArmor profile %q specified but not loaded", name)
+		}
+		return name, nil
+	}
+
+	name = Profile
+	// To avoid expensive redundant loads on each invocation, check
+	// if it's loaded before installing it.
+	isLoaded, err := IsLoaded(name)
+	if err != nil {
+		return "", err
+	}
+	if !isLoaded {
+		err = InstallDefault(name)
+		if err != nil {
+			return "", err
+		}
+		logrus.Infof("successfully loaded AppAmor profile %q", name)
+	} else {
+		logrus.Infof("AppAmor profile %q is already loaded", name)
+	}
+
+	return name, nil
+}

vendor/github.com/containers/common/pkg/apparmor/apparmor_linux_template.go

@@ -0,0 +1,49 @@
+// +build linux,apparmor
+
+package apparmor
+
+const defaultProfileTemplate = `
+{{range $value := .Imports}}
+{{$value}}
+{{end}}
+
+profile {{.Name}} flags=(attach_disconnected,mediate_deleted) {
+{{range $value := .InnerImports}}
+  {{$value}}
+{{end}}
+
+  network,
+  capability,
+  file,
+  umount,
+
+{{if ge .Version 208096}}
+  # Allow signals from privileged profiles and from within the same profile
+  signal (receive) peer=unconfined,
+  signal (send,receive) peer={{.Name}},
+{{end}}
+
+  deny @{PROC}/* w,   # deny write for all files directly in /proc (not in a subdir)
+  # deny write to files not in /proc/<number>/** or /proc/sys/**
+  deny @{PROC}/{[^1-9],[^1-9][^0-9],[^1-9s][^0-9y][^0-9s],[^1-9][^0-9][^0-9][^0-9]*}/** w,
+  deny @{PROC}/sys/[^k]** w,  # deny /proc/sys except /proc/sys/k* (effectively /proc/sys/kernel)
+  deny @{PROC}/sys/kernel/{?,??,[^s][^h][^m]**} w,  # deny everything except shm* in /proc/sys/kernel/
+  deny @{PROC}/sysrq-trigger rwklx,
+  deny @{PROC}/kcore rwklx,
+
+  deny mount,
+
+  deny /sys/[^f]*/** wklx,
+  deny /sys/f[^s]*/** wklx,
+  deny /sys/fs/[^c]*/** wklx,
+  deny /sys/fs/c[^g]*/** wklx,
+  deny /sys/fs/cg[^r]*/** wklx,
+  deny /sys/firmware/** rwklx,
+  deny /sys/kernel/security/** rwklx,
+
+{{if ge .Version 208095}}
+  # suppress ptrace denials when using using 'ps' inside a container
+  ptrace (trace,read) peer={{.Name}},
+{{end}}
+}
+`

vendor/github.com/containers/common/pkg/apparmor/apparmor_unsupported.go

@@ -0,0 +1,31 @@
+// +build !linux !apparmor
+
+package apparmor
+
+// IsEnabled dummy.
+func IsEnabled() bool {
+	return false
+}
+
+// InstallDefault dummy.
+func InstallDefault(name string) error {
+	return ErrApparmorUnsupported
+}
+
+// IsLoaded dummy.
+func IsLoaded(name string) (bool, error) {
+	return false, ErrApparmorUnsupported
+}
+
+// CheckProfileAndLoadDefault dummy.
+func CheckProfileAndLoadDefault(name string) (string, error) {
+	if name == "" {
+		return "", nil
+	}
+	return "", ErrApparmorUnsupported
+}
+
+// DefaultContent dummy.
+func DefaultContent(name string) ([]byte, error) {
+	return nil, nil
+}