Safely get certificate's leaf

- It's not guaranteed that `tls.X509KeyPair` will set `c.Leaf`.
- This patch fixes this by using a wrapper that parses the leaf
certificate(in bytes) if `c.Leaf` wasn't set.
- Resolves #149
This commit is contained in:
Gusted 2023-01-03 22:43:14 +01:00
parent 9d769aeee7
commit 5f52d681fc
No known key found for this signature in database
GPG Key ID: FD821B732837125F

View File

@ -303,7 +303,11 @@ func obtainCert(acmeClient *lego.Client, domains []string, renew *certificate.Re
log.Error().Err(err).Msgf("Couldn't obtain again a certificate or %v", domains)
if renew != nil && renew.CertURL != "" {
tlsCertificate, err := tls.X509KeyPair(renew.Certificate, renew.PrivateKey)
if err == nil && tlsCertificate.Leaf.NotAfter.After(time.Now()) {
if err != nil {
return mockCert(domains[0], err.Error(), mainDomainSuffix, keyDatabase), err
}
leaf, err := leaf(&tlsCertificate)
if err == nil && leaf.NotAfter.After(time.Now()) {
// avoid sending a mock cert instead of a still valid cert, instead abuse CSR field to store time to try again at
renew.CSR = []byte(strconv.FormatInt(time.Now().Add(6*time.Hour).Unix(), 10))
if err := keyDatabase.Put(name, renew); err != nil {
@ -529,3 +533,12 @@ func MaintainCertDB(ctx context.Context, interval time.Duration, mainDomainSuffi
}
}
}
// leaf returns the parsed leaf certificate, either from c.leaf or by parsing
// the corresponding c.Certificate[0].
func leaf(c *tls.Certificate) (*x509.Certificate, error) {
if c.Leaf != nil {
return c.Leaf, nil
}
return x509.ParseCertificate(c.Certificate[0])
}