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lego/cmd/accounts_storage.go

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package cmd
import (
"crypto"
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/x509"
"encoding/json"
"encoding/pem"
"errors"
"fmt"
"io/ioutil"
"net/url"
"os"
"path/filepath"
"strings"
"github.com/urfave/cli"
"github.com/xenolf/lego/lego"
"github.com/xenolf/lego/log"
"github.com/xenolf/lego/registration"
)
const (
baseAccountsRootFolderName = "accounts"
baseKeysFolderName = "keys"
accountFileName = "account.json"
)
// AccountsStorage A storage for account data.
//
// rootPath:
//
// ./.lego/accounts/
// │ └── root accounts directory
// └── "path" option
//
// rootUserPath:
//
// ./.lego/accounts/localhost_14000/hubert@hubert.com/
// │ │ │ └── userID ("email" option)
// │ │ └── CA server ("server" option)
// │ └── root accounts directory
// └── "path" option
//
// keysPath:
//
// ./.lego/accounts/localhost_14000/hubert@hubert.com/keys/
// │ │ │ │ └── root keys directory
// │ │ │ └── userID ("email" option)
// │ │ └── CA server ("server" option)
// │ └── root accounts directory
// └── "path" option
//
// accountFilePath:
//
// ./.lego/accounts/localhost_14000/hubert@hubert.com/account.json
// │ │ │ │ └── account file
// │ │ │ └── userID ("email" option)
// │ │ └── CA server ("server" option)
// │ └── root accounts directory
// └── "path" option
//
type AccountsStorage struct {
userID string
rootPath string
rootUserPath string
keysPath string
accountFilePath string
ctx *cli.Context
}
// NewAccountsStorage Creates a new AccountsStorage.
func NewAccountsStorage(ctx *cli.Context) *AccountsStorage {
// TODO: move to account struct? Currently MUST pass email.
email := getEmail(ctx)
serverURL, err := url.Parse(ctx.GlobalString("server"))
if err != nil {
log.Fatal(err)
}
rootPath := filepath.Join(ctx.GlobalString("path"), baseAccountsRootFolderName)
serverPath := strings.NewReplacer(":", "_", "/", string(os.PathSeparator)).Replace(serverURL.Host)
accountsPath := filepath.Join(rootPath, serverPath)
rootUserPath := filepath.Join(accountsPath, email)
return &AccountsStorage{
userID: email,
rootPath: rootPath,
rootUserPath: rootUserPath,
keysPath: filepath.Join(rootUserPath, baseKeysFolderName),
accountFilePath: filepath.Join(rootUserPath, accountFileName),
ctx: ctx,
}
}
func (s *AccountsStorage) ExistsAccountFilePath() bool {
accountFile := filepath.Join(s.rootUserPath, accountFileName)
if _, err := os.Stat(accountFile); os.IsNotExist(err) {
return false
} else if err != nil {
log.Fatal(err)
}
return true
}
func (s *AccountsStorage) GetRootPath() string {
return s.rootPath
}
func (s *AccountsStorage) GetRootUserPath() string {
return s.rootUserPath
}
func (s *AccountsStorage) GetUserID() string {
return s.userID
}
func (s *AccountsStorage) Save(account *Account) error {
jsonBytes, err := json.MarshalIndent(account, "", "\t")
if err != nil {
return err
}
return ioutil.WriteFile(s.accountFilePath, jsonBytes, filePerm)
}
func (s *AccountsStorage) LoadAccount(privateKey crypto.PrivateKey) *Account {
fileBytes, err := ioutil.ReadFile(s.accountFilePath)
if err != nil {
log.Fatalf("Could not load file for account %s -> %v", s.userID, err)
}
var account Account
err = json.Unmarshal(fileBytes, &account)
if err != nil {
log.Fatalf("Could not parse file for account %s -> %v", s.userID, err)
}
account.key = privateKey
if account.Registration == nil || account.Registration.Body.Status == "" {
reg, err := tryRecoverRegistration(s.ctx, privateKey)
if err != nil {
log.Fatalf("Could not load account for %s. Registration is nil -> %#v", s.userID, err)
}
account.Registration = reg
err = s.Save(&account)
if err != nil {
log.Fatalf("Could not save account for %s. Registration is nil -> %#v", s.userID, err)
}
}
return &account
}
func (s *AccountsStorage) GetPrivateKey() crypto.PrivateKey {
accKeyPath := filepath.Join(s.keysPath, s.userID+".key")
if _, err := os.Stat(accKeyPath); os.IsNotExist(err) {
log.Printf("No key found for account %s. Generating a curve P384 EC key.", s.userID)
s.createKeysFolder()
privateKey, err := generatePrivateKey(accKeyPath)
if err != nil {
log.Fatalf("Could not generate RSA private account key for account %s: %v", s.userID, err)
}
log.Printf("Saved key to %s", accKeyPath)
return privateKey
}
privateKey, err := loadPrivateKey(accKeyPath)
if err != nil {
log.Fatalf("Could not load RSA private key from file %s: %v", accKeyPath, err)
}
return privateKey
}
func (s *AccountsStorage) createKeysFolder() {
if err := createNonExistingFolder(s.keysPath); err != nil {
log.Fatalf("Could not check/create directory for account %s: %v", s.userID, err)
}
}
func generatePrivateKey(file string) (crypto.PrivateKey, error) {
privateKey, err := ecdsa.GenerateKey(elliptic.P384(), rand.Reader)
if err != nil {
return nil, err
}
keyBytes, err := x509.MarshalECPrivateKey(privateKey)
if err != nil {
return nil, err
}
pemKey := pem.Block{Type: "EC PRIVATE KEY", Bytes: keyBytes}
certOut, err := os.Create(file)
if err != nil {
return nil, err
}
defer certOut.Close()
err = pem.Encode(certOut, &pemKey)
if err != nil {
return nil, err
}
return privateKey, nil
}
func loadPrivateKey(file string) (crypto.PrivateKey, error) {
keyBytes, err := ioutil.ReadFile(file)
if err != nil {
return nil, err
}
keyBlock, _ := pem.Decode(keyBytes)
switch keyBlock.Type {
case "RSA PRIVATE KEY":
return x509.ParsePKCS1PrivateKey(keyBlock.Bytes)
case "EC PRIVATE KEY":
return x509.ParseECPrivateKey(keyBlock.Bytes)
}
return nil, errors.New("unknown private key type")
}
func tryRecoverRegistration(ctx *cli.Context, privateKey crypto.PrivateKey) (*registration.Resource, error) {
// couldn't load account but got a key. Try to look the account up.
config := lego.NewConfig(&Account{key: privateKey})
config.CADirURL = ctx.GlobalString("server")
config.UserAgent = fmt.Sprintf("lego-cli/%s", ctx.App.Version)
client, err := lego.NewClient(config)
if err != nil {
return nil, err
}
reg, err := client.Registration.ResolveAccountByKey()
if err != nil {
return nil, err
}
return reg, nil
}