// moveStorage moves the old certificate storage location by
// renaming the "letsencrypt" folder to the hostname of the
// CA URL. This is TEMPORARY until most users have upgraded to 0.9+.
func moveStorage() {
oldPath := filepath.Join(caddy.AssetsPath(), "letsencrypt")
_, err := os.Stat(oldPath)
if os.IsNotExist(err) {
return
}
newPath, err := caddytls.StorageFor(caddytls.DefaultCAUrl)
if err != nil {
log.Fatalf("[ERROR] Unable to get new path for certificate storage: %v", err)
}
err = os.MkdirAll(string(newPath), 0700)
if err != nil {
log.Fatalf("[ERROR] Unable to make new certificate storage path: %v\n\nPlease follow instructions at:\nhttps://github.com/mholt/caddy/issues/902#issuecomment-228876011", err)
}
err = os.Rename(oldPath, string(newPath))
if err != nil {
log.Fatalf("[ERROR] Unable to migrate certificate storage: %v\n\nPlease follow instructions at:\nhttps://github.com/mholt/caddy/issues/902#issuecomment-228876011", err)
}
// convert mixed case folder and file names to lowercase
filepath.Walk(string(newPath), func(path string, info os.FileInfo, err error) error {
// must be careful to only lowercase the base of the path, not the whole thing!!
base := filepath.Base(path)
if lowerBase := strings.ToLower(base); base != lowerBase {
lowerPath := filepath.Join(filepath.Dir(path), lowerBase)
err = os.Rename(path, lowerPath)
if err != nil {
log.Fatalf("[ERROR] Unable to lower-case: %v\n\nPlease follow instructions at:\nhttps://github.com/mholt/caddy/issues/902#issuecomment-228876011", err)
}
}
return nil
})
}
// moveStorage moves the old certificate storage location by
// renaming the "letsencrypt" folder to the hostname of the
// CA URL. This is TEMPORARY until most users have upgraded to 0.9+.
func moveStorage() {
oldPath := filepath.Join(caddy.AssetsPath(), "letsencrypt")
_, err := os.Stat(oldPath)
if os.IsNotExist(err) {
return
}
// Just use a default config to get default (file) storage
fileStorage, err := new(caddytls.Config).StorageFor(caddytls.DefaultCAUrl)
if err != nil {
log.Fatalf("[ERROR] Unable to get new path for certificate storage: %v", err)
}
newPath := string(fileStorage.(caddytls.FileStorage))
err = os.MkdirAll(string(newPath), 0700)
if err != nil {
log.Fatalf("[ERROR] Unable to make new certificate storage path: %v\n\nPlease follow instructions at:\nhttps://github.com/mholt/caddy/issues/902#issuecomment-228876011", err)
}
err = os.Rename(oldPath, string(newPath))
if err != nil {
log.Fatalf("[ERROR] Unable to migrate certificate storage: %v\n\nPlease follow instructions at:\nhttps://github.com/mholt/caddy/issues/902#issuecomment-228876011", err)
}
// convert mixed case folder and file names to lowercase
var done bool // walking is recursive and preloads the file names, so we must restart walk after a change until no changes
for !done {
done = true
filepath.Walk(string(newPath), func(path string, info os.FileInfo, err error) error {
// must be careful to only lowercase the base of the path, not the whole thing!!
base := filepath.Base(path)
if lowerBase := strings.ToLower(base); base != lowerBase {
lowerPath := filepath.Join(filepath.Dir(path), lowerBase)
err = os.Rename(path, lowerPath)
if err != nil {
log.Fatalf("[ERROR] Unable to lower-case: %v\n\nPlease follow instructions at:\nhttps://github.com/mholt/caddy/issues/902#issuecomment-228876011", err)
}
// terminate traversal and restart since Walk needs the updated file list with new file names
done = false
return errors.New("start over")
}
return nil
})
}
}
import (
"github.com/mholt/caddy"
"io/ioutil"
"net/url"
"os"
"path/filepath"
"strings"
)
func init() {
RegisterStorageProvider("file", FileStorageCreator)
}
// storageBasePath is the root path in which all TLS/ACME assets are
// stored. Do not change this value during the lifetime of the program.
var storageBasePath = filepath.Join(caddy.AssetsPath(), "acme")
// FileStorageCreator creates a new Storage instance backed by the local
// disk. The resulting Storage instance is guaranteed to be non-nil if
// there is no error. This can be used by "middleware" implementations that
// may want to proxy the disk storage.
func FileStorageCreator(caURL *url.URL) (Storage, error) {
return FileStorage(filepath.Join(storageBasePath, caURL.Host)), nil
}
// FileStorage is a root directory and facilitates forming file paths derived
// from it. It is used to get file paths in a consistent, cross- platform way
// for persisting ACME assets on the file system.
type FileStorage string
// sites gets the directory that stores site certificate and keys.
continue
}
resp, err := ocsp.ParseResponse(ocspBytes, nil)
if err != nil {
// contents are invalid; delete it
err = os.Remove(stapleFile)
if err != nil {
log.Printf("[ERROR] Purging corrupt staple file %s: %v", stapleFile, err)
}
}
if time.Now().After(resp.NextUpdate) {
// response has expired; delete it
err = os.Remove(stapleFile)
if err != nil {
log.Printf("[ERROR] Purging expired staple file %s: %v", stapleFile, err)
}
}
}
}
// freshOCSP returns true if resp is still fresh,
// meaning that it is not expedient to get an
// updated response from the OCSP server.
func freshOCSP(resp *ocsp.Response) bool {
// start checking OCSP staple about halfway through validity period for good measure
refreshTime := resp.ThisUpdate.Add(resp.NextUpdate.Sub(resp.ThisUpdate) / 2)
return time.Now().Before(refreshTime)
}
var ocspFolder = filepath.Join(caddy.AssetsPath(), "ocsp")
// stapleOCSP staples OCSP information to cert for hostname name.
// If you have it handy, you should pass in the PEM-encoded certificate
// bundle; otherwise the DER-encoded cert will have to be PEM-encoded.
// If you don't have the PEM blocks already, just pass in nil.
//
// Errors here are not necessarily fatal, it could just be that the
// certificate doesn't have an issuer URL.
func stapleOCSP(cert *Certificate, pemBundle []byte) error {
if pemBundle == nil {
// The function in the acme package that gets OCSP requires a PEM-encoded cert
bundle := new(bytes.Buffer)
for _, derBytes := range cert.Certificate.Certificate {
pem.Encode(bundle, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
}
pemBundle = bundle.Bytes()
}
var ocspBytes []byte
var ocspResp *ocsp.Response
var ocspErr error
var gotNewOCSP bool
// First try to load OCSP staple from storage and see if
// we can still use it.
// TODO: Use Storage interface instead of disk directly
var ocspFileNamePrefix string
if len(cert.Names) > 0 {
ocspFileNamePrefix = cert.Names[0] + "-"
}
ocspFileName := ocspFileNamePrefix + fastHash(pemBundle)
ocspCachePath := filepath.Join(ocspFolder, ocspFileName)
cachedOCSP, err := ioutil.ReadFile(ocspCachePath)
if err == nil {
resp, err := ocsp.ParseResponse(cachedOCSP, nil)
if err == nil {
if freshOCSP(resp) {
// staple is still fresh; use it
ocspBytes = cachedOCSP
ocspResp = resp
}
} else {
// invalid contents; delete the file
// (we do this independently of the maintenance routine because
// in this case we know for sure this should be a staple file
// because we loaded it by name, whereas the maintenance routine
// just iterates the list of files, even if somehow a non-staple
// file gets in the folder. in this case we are sure it is corrupt.)
err := os.Remove(ocspCachePath)
if err != nil {
log.Printf("[WARNING] Unable to delete invalid OCSP staple file: %v", err)
}
}
}
// If we couldn't get a fresh staple by reading the cache,
// then we need to request it from the OCSP responder
if ocspResp == nil || len(ocspBytes) == 0 {
ocspBytes, ocspResp, ocspErr = acme.GetOCSPForCert(pemBundle)
if ocspErr != nil {
// An error here is not a problem because a certificate may simply
// not contain a link to an OCSP server. But we should log it anyway.
// There's nothing else we can do to get OCSP for this certificate,
// so we can return here with the error.
return fmt.Errorf("no OCSP stapling for %v: %v", cert.Names, ocspErr)
}
gotNewOCSP = true
}
// By now, we should have a response. If good, staple it to
// the certificate. If the OCSP response was not loaded from
// storage, we persist it for next time.
if ocspResp.Status == ocsp.Good {
cert.Certificate.OCSPStaple = ocspBytes
cert.OCSP = ocspResp
if gotNewOCSP {
err := os.MkdirAll(filepath.Join(caddy.AssetsPath(), "ocsp"), 0700)
if err != nil {
return fmt.Errorf("unable to make OCSP staple path for %v: %v", cert.Names, err)
}
err = ioutil.WriteFile(ocspCachePath, ocspBytes, 0644)
if err != nil {
return fmt.Errorf("unable to write OCSP staple file for %v: %v", cert.Names, err)
}
}
}
return nil
}