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Add local file embedding for SSH keys and systemd units #289

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merged 4 commits into from
Mar 14, 2023
Merged

Add local file embedding for SSH keys and systemd units #289

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b66fb3e
docs: prepare flatcar & r4e upgrade documentation
Okeanos Jun 25, 2022
3896e68
base/v0_5_exp: add local file embedding for SSH keys (#179)
Okeanos Jun 25, 2022
e09f037
base/v0_5_exp: add local file embedding for systemd units (#179)
Okeanos Jun 25, 2022
c6e10cd
docs: update release notes for local file embedding feature
Okeanos Sep 12, 2022
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45 changes: 24 additions & 21 deletions base/v0_5_exp/schema.go
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Original file line number Diff line number Diff line change
Expand Up @@ -54,8 +54,9 @@ type Disk struct {
}

type Dropin struct {
Contents *string `yaml:"contents"`
Name string `yaml:"name"`
Contents *string `yaml:"contents"`
ContentsLocal *string `yaml:"contents_local"`
Name string `yaml:"name"`
}

type File struct {
Expand Down Expand Up @@ -166,20 +167,21 @@ type PasswdGroup struct {
}

type PasswdUser struct {
Gecos *string `yaml:"gecos"`
Groups []Group `yaml:"groups"`
HomeDir *string `yaml:"home_dir"`
Name string `yaml:"name"`
NoCreateHome *bool `yaml:"no_create_home"`
NoLogInit *bool `yaml:"no_log_init"`
NoUserGroup *bool `yaml:"no_user_group"`
PasswordHash *string `yaml:"password_hash"`
PrimaryGroup *string `yaml:"primary_group"`
ShouldExist *bool `yaml:"should_exist"`
SSHAuthorizedKeys []SSHAuthorizedKey `yaml:"ssh_authorized_keys"`
Shell *string `yaml:"shell"`
System *bool `yaml:"system"`
UID *int `yaml:"uid"`
Gecos *string `yaml:"gecos"`
Groups []Group `yaml:"groups"`
HomeDir *string `yaml:"home_dir"`
Name string `yaml:"name"`
NoCreateHome *bool `yaml:"no_create_home"`
NoLogInit *bool `yaml:"no_log_init"`
NoUserGroup *bool `yaml:"no_user_group"`
PasswordHash *string `yaml:"password_hash"`
PrimaryGroup *string `yaml:"primary_group"`
ShouldExist *bool `yaml:"should_exist"`
SSHAuthorizedKeys []SSHAuthorizedKey `yaml:"ssh_authorized_keys"`
SSHAuthorizedKeysLocal []string `yaml:"ssh_authorized_keys_local"`
Shell *string `yaml:"shell"`
System *bool `yaml:"system"`
UID *int `yaml:"uid"`
}

type Proxy struct {
Expand Down Expand Up @@ -247,11 +249,12 @@ type Tree struct {
}

type Unit struct {
Contents *string `yaml:"contents"`
Dropins []Dropin `yaml:"dropins"`
Enabled *bool `yaml:"enabled"`
Mask *bool `yaml:"mask"`
Name string `yaml:"name"`
Contents *string `yaml:"contents"`
ContentsLocal *string `yaml:"contents_local"`
Dropins []Dropin `yaml:"dropins"`
Enabled *bool `yaml:"enabled"`
Mask *bool `yaml:"mask"`
Name string `yaml:"name"`
}

type Verification struct {
Expand Down
129 changes: 129 additions & 0 deletions base/v0_5_exp/translate.go
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@ import (
"os"
slashpath "path"
"path/filepath"
"regexp"
"strings"
"text/template"

Expand Down Expand Up @@ -86,6 +87,8 @@ func (c Config) ToIgn3_4Unvalidated(options common.TranslateOptions) (types.Conf
tr.AddCustomTranslator(translateDirectory)
tr.AddCustomTranslator(translateLink)
tr.AddCustomTranslator(translateResource)
tr.AddCustomTranslator(translatePasswdUser)
tr.AddCustomTranslator(translateUnit)

tm, r := translate.Prefixed(tr, "ignition", &c.Ignition, &ret.Ignition)
tm.AddTranslation(path.New("yaml", "version"), path.New("json", "ignition", "version"))
Expand Down Expand Up @@ -212,6 +215,132 @@ func translateLink(from Link, options common.TranslateOptions) (to types.Link, t
return
}

func translatePasswdUser(from PasswdUser, options common.TranslateOptions) (to types.PasswdUser, tm translate.TranslationSet, r report.Report) {
tr := translate.NewTranslator("yaml", "json", options)
tm, r = translate.Prefixed(tr, "gecos", &from.Gecos, &to.Gecos)
translate.MergeP(tr, tm, &r, "groups", &from.Groups, &to.Groups)
translate.MergeP2(tr, tm, &r, "home_dir", &from.HomeDir, "homeDir", &to.HomeDir)
translate.MergeP(tr, tm, &r, "name", &from.Name, &to.Name)
translate.MergeP2(tr, tm, &r, "no_create_home", &from.NoCreateHome, "noCreateHome", &to.NoCreateHome)
translate.MergeP2(tr, tm, &r, "no_log_init", &from.NoLogInit, "noLogInit", &to.NoLogInit)
translate.MergeP2(tr, tm, &r, "no_user_group", &from.NoUserGroup, "noUserGroup", &to.NoUserGroup)
translate.MergeP2(tr, tm, &r, "password_hash", &from.PasswordHash, "passwordHash", &to.PasswordHash)
translate.MergeP2(tr, tm, &r, "primary_group", &from.PrimaryGroup, "primaryGroup", &to.PrimaryGroup)
translate.MergeP(tr, tm, &r, "shell", &from.Shell, &to.Shell)
translate.MergeP2(tr, tm, &r, "should_exist", &from.ShouldExist, "shouldExist", &to.ShouldExist)
translate.MergeP2(tr, tm, &r, "ssh_authorized_keys", &from.SSHAuthorizedKeys, "sshAuthorizedKeys", &to.SSHAuthorizedKeys)
translate.MergeP(tr, tm, &r, "system", &from.System, &to.System)
translate.MergeP(tr, tm, &r, "uid", &from.UID, &to.UID)

if len(from.SSHAuthorizedKeysLocal) > 0 {
c := path.New("yaml", "ssh_authorized_keys_local")
tm.AddTranslation(c, path.New("json", "sshAuthorizedKeys"))

if options.FilesDir == "" {
r.AddOnError(c, common.ErrNoFilesDir)
return
}
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for _, sshKeyFile := range from.SSHAuthorizedKeysLocal {
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sshKeys, err := readSshKeyFile(options.FilesDir, sshKeyFile)
if err != nil {
r.AddOnError(c, err)
continue
}

// offset for TranslationSets when both ssh_authorized_keys and ssh_authorized_keys_local are available
offset := len(to.SSHAuthorizedKeys)
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for i, line := range regexp.MustCompile("\r?\n").Split(sshKeys, -1) {
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tm.AddTranslation(c, path.New("json", "sshAuthorizedKeys", i+offset))
to.SSHAuthorizedKeys = append(to.SSHAuthorizedKeys, types.SSHAuthorizedKey(line))
}
}
}

return
}

func readSshKeyFile(filesDir string, sshKeyFile string) (string, error) {
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// calculate file path within FilesDir and check for path traversal
filePath := filepath.Join(filesDir, sshKeyFile)
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if err := baseutil.EnsurePathWithinFilesDir(filePath, filesDir); err != nil {
return "", err
}
contents, err := os.ReadFile(filePath)
if err != nil {
return "", err
}
return string(contents), nil
}

func translateUnit(from Unit, options common.TranslateOptions) (to types.Unit, tm translate.TranslationSet, r report.Report) {
tr := translate.NewTranslator("yaml", "json", options)
tr.AddCustomTranslator(translateUnitDropIn)
tm, r = translate.Prefixed(tr, "contents", &from.Contents, &to.Contents)
translate.MergeP(tr, tm, &r, "dropins", &from.Dropins, &to.Dropins)
translate.MergeP(tr, tm, &r, "enabled", &from.Enabled, &to.Enabled)
translate.MergeP(tr, tm, &r, "mask", &from.Mask, &to.Mask)
translate.MergeP(tr, tm, &r, "name", &from.Name, &to.Name)

if util.NotEmpty(from.ContentsLocal) {
c := path.New("yaml", "contents_local")
if options.FilesDir == "" {
r.AddOnError(c, common.ErrNoFilesDir)
return
}

// calculate file path within FilesDir and check for
// path traversal
filePath := filepath.Join(options.FilesDir, *from.ContentsLocal)
if err := baseutil.EnsurePathWithinFilesDir(filePath, options.FilesDir); err != nil {
r.AddOnError(c, err)
return
}
contents, err := os.ReadFile(filePath)
if err != nil {
r.AddOnError(c, err)
return
}
tm.AddTranslation(c, path.New("json", "contents"))
to.Contents = util.StrToPtr(string(contents))
}

return
}

func translateUnitDropIn(from Dropin, options common.TranslateOptions) (to types.Dropin, tm translate.TranslationSet, r report.Report) {
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tr := translate.NewTranslator("yaml", "json", options)
tm, r = translate.Prefixed(tr, "contents", &from.Contents, &to.Contents)
translate.MergeP(tr, tm, &r, "name", &from.Name, &to.Name)

if util.NotEmpty(from.ContentsLocal) {
c := path.New("yaml", "contents_local")
tm.AddTranslation(c, path.New("json", "contents"))

if options.FilesDir == "" {
r.AddOnError(c, common.ErrNoFilesDir)
return
}

// calculate file path within FilesDir and check for
// path traversal
filePath := filepath.Join(options.FilesDir, *from.ContentsLocal)
if err := baseutil.EnsurePathWithinFilesDir(filePath, options.FilesDir); err != nil {
r.AddOnError(c, err)
return
}
contents, err := os.ReadFile(filePath)
if err != nil {
r.AddOnError(c, err)
return
}
stringContents := string(contents)
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to.Contents = util.StrToPtr(stringContents)
}

return
}

func (c Config) processTrees(ret *types.Config, options common.TranslateOptions) (translate.TranslationSet, report.Report) {
ts := translate.NewTranslationSet("yaml", "json")
var r report.Report
Expand Down
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