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Add -macos-be-damned flag (sets cert validity to 100 years) #64

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Add -macos-be-damned flag (sets cert validity to 100 years) #64

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22 changes: 14 additions & 8 deletions main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -213,7 +213,7 @@ func calculateSKID(pubKey crypto.PublicKey) ([]byte, error) {
return skid[:], nil
}

func sign(iss *issuer, domains []string, ipAddresses []string) (*x509.Certificate, error) {
func sign(iss *issuer, domains []string, ipAddresses []string, noValidityLimit bool) (*x509.Certificate, error) {
var cn string
if len(domains) > 0 {
cn = domains[0]
Expand All @@ -239,19 +239,24 @@ func sign(iss *issuer, domains []string, ipAddresses []string) (*x509.Certificat
if err != nil {
return nil, err
}
notBefore := time.Now()
// Set the validity period to 2 years and 30 days, to satisfy the iOS and
// macOS requirements that all server certificates must have validity
// shorter than 825 days:
// https://derflounder.wordpress.com/2019/06/06/new-tls-security-requirements-for-ios-13-and-macos-catalina-10-15/
notAfter := notBefore.AddDate(2, 0, 30)
if noValidityLimit {
notAfter = notBefore.AddDate(100, 0, 0)
}
template := &x509.Certificate{
DNSNames: domains,
IPAddresses: parsedIPs,
Subject: pkix.Name{
CommonName: cn,
},
SerialNumber: serial,
NotBefore: time.Now(),
// Set the validity period to 2 years and 30 days, to satisfy the iOS and
// macOS requirements that all server certificates must have validity
// shorter than 825 days:
// https://derflounder.wordpress.com/2019/06/06/new-tls-security-requirements-for-ios-13-and-macos-catalina-10-15/
NotAfter: time.Now().AddDate(2, 0, 30),
NotBefore: notBefore,
NotAfter: notAfter,

KeyUsage: x509.KeyUsageDigitalSignature | x509.KeyUsageKeyEncipherment,
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth, x509.ExtKeyUsageClientAuth},
Expand Down Expand Up @@ -289,6 +294,7 @@ func main2() error {
var caCert = flag.String("ca-cert", "minica.pem", "Root certificate filename, PEM encoded.")
var domains = flag.String("domains", "", "Comma separated domain names to include as Server Alternative Names.")
var ipAddresses = flag.String("ip-addresses", "", "Comma separated IP addresses to include as Server Alternative Names.")
var macOSBeDamned = flag.Bool("macos-be-damned", false, "Ignore Apple's 2 year + 30 day certificate validity ceiling (use 100 years).")
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage of %s:\n", os.Args[0])
fmt.Fprintf(os.Stderr, `
Expand Down Expand Up @@ -340,6 +346,6 @@ will not overwrite existing keys or certificates.
if err != nil {
return err
}
_, err = sign(issuer, domainSlice, ipSlice)
_, err = sign(issuer, domainSlice, ipSlice, *macOSBeDamned)
return err
}