software steht so weit.
jetzt build + docker build und testen
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@@ -0,0 +1,153 @@
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package license
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import (
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"crypto/ed25519"
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"encoding/base64"
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"encoding/json"
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"fmt"
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"math/rand/v2"
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"strings"
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"time"
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)
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// Laufzeiten der Leases (Spec 4.1a).
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const (
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CommunityLease = 14 * 24 * time.Hour
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CommunityRenewAfter = 7 * 24 * time.Hour
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CommunityRenewJitter = 12 * time.Hour
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CommercialLease = 7 * 24 * time.Hour
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CommercialMaintenance = 10 * 24 * time.Hour
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)
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// LeaseTerms sind Erneuerungs- und Ablaufzeitpunkt einer Lease.
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type LeaseTerms struct {
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RenewAfter time.Time
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ValidUntil time.Time
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}
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// TermsFor berechnet die Lease-Zeiten. Kommerziell: 7 Tage (in Wartung 10),
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// Erneuerung nach 2/3, höchstens bis zum Vertragsende; nach Vertragsende
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// gibt es keine Lease (ok=false). Community: 14 Tage, Erneuerung nach
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// 7 Tagen ± Streuung (jitter liefert einen Wert in [-max, +max]; nil =
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// zufällig), Vertragsende ohne Bedeutung. override > 0 setzt eine feste
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// Laufzeit (Tests, Betrieb), Erneuerung dann nach 2/3.
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func TermsFor(tier Tier, maintenance bool, licenseUntil, now time.Time, override time.Duration,
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jitter func(max time.Duration) time.Duration) (LeaseTerms, bool) {
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commercial := tier != TierCommunity
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if commercial && !now.Before(licenseUntil) {
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return LeaseTerms{}, false
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}
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var t LeaseTerms
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switch {
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case override > 0:
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t.ValidUntil = now.Add(override)
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case !commercial:
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if jitter == nil {
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jitter = randomJitter
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}
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return LeaseTerms{
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ValidUntil: now.Add(CommunityLease),
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RenewAfter: now.Add(CommunityRenewAfter + jitter(CommunityRenewJitter)),
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}, true
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case maintenance:
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t.ValidUntil = now.Add(CommercialMaintenance)
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default:
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t.ValidUntil = now.Add(CommercialLease)
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}
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if commercial && t.ValidUntil.After(licenseUntil) {
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t.ValidUntil = licenseUntil
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}
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t.RenewAfter = now.Add(t.ValidUntil.Sub(now) * 2 / 3)
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return t, true
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}
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func randomJitter(max time.Duration) time.Duration {
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return time.Duration(rand.Int64N(int64(2*max)+1)) - max
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}
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// Lease ist die signierte, kurzlaufende Kopie der Lizenz für einen Knoten.
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type Lease struct {
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NodeID string `json:"node_id"`
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TenantID string `json:"tenant_id"`
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Tier Tier `json:"tier"`
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MaxRoutes int `json:"max_routes"`
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AllowedDomains []string `json:"allowed_domains"`
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Features []Feature `json:"features"`
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IssuedAt time.Time `json:"issued_at"`
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RenewAfter time.Time `json:"renew_after"`
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ValidUntil time.Time `json:"valid_until"`
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Signature string `json:"signature"`
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}
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// Eigenes Präfix: Eine Lease-Signatur gilt nie als Lizenz-Signatur und umgekehrt.
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const leaseSignatureVersion = "SULTAN-LEASE-V1\n"
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func (l Lease) message() []byte {
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c := l
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c.Signature = ""
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c.IssuedAt, c.RenewAfter, c.ValidUntil = c.IssuedAt.UTC(), c.RenewAfter.UTC(), c.ValidUntil.UTC()
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b, _ := json.Marshal(c)
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return append([]byte(leaseSignatureVersion), b...)
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}
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// IssueLease stellt eine Lease für nodeID aus den Werten von l aus.
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func (i *Issuer) IssueLease(l License, nodeID string, terms LeaseTerms, now time.Time) (Lease, error) {
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if len(i.Key) != ed25519.PrivateKeySize {
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return Lease{}, fmt.Errorf("license: Issuer ohne gültigen Master-Key")
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}
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if strings.TrimSpace(nodeID) == "" {
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return Lease{}, fmt.Errorf("%w: node_id fehlt", ErrInvalid)
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}
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utc := func(t time.Time) time.Time { return t.Round(0).UTC() }
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lease := Lease{
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NodeID: nodeID,
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TenantID: l.TenantID,
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Tier: l.Tier,
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MaxRoutes: l.MaxRoutes,
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AllowedDomains: append([]string{}, l.AllowedDomains...),
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Features: append([]Feature{}, l.Features...),
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IssuedAt: utc(now),
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RenewAfter: utc(terms.RenewAfter),
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ValidUntil: utc(terms.ValidUntil),
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}
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lease.Signature = base64.StdEncoding.EncodeToString(ed25519.Sign(i.Key, lease.message()))
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return lease, nil
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}
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// Verify prüft die Signatur mit dem Public Key des Master-Keys.
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func (l Lease) Verify(pub ed25519.PublicKey) error {
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sig, err := base64.StdEncoding.DecodeString(l.Signature)
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if err != nil || len(sig) != ed25519.SignatureSize || len(pub) != ed25519.PublicKeySize {
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return ErrInvalidSignature
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}
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if !ed25519.Verify(pub, l.message(), sig) {
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return ErrInvalidSignature
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}
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return nil
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}
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// Expired meldet, ob die Lease zum Zeitpunkt now abgelaufen ist.
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func (l Lease) Expired(now time.Time) bool { return !now.Before(l.ValidUntil) }
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// ParseLease liest und prüft eine Lease (unbekannte Felder sind Fehler).
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func ParseLease(data []byte, pub ed25519.PublicKey) (Lease, error) {
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dec := json.NewDecoder(strings.NewReader(string(data)))
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dec.DisallowUnknownFields()
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var l Lease
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if err := dec.Decode(&l); err != nil {
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return Lease{}, fmt.Errorf("%w: %v", ErrInvalid, err)
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}
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if l.NodeID == "" || l.ValidUntil.IsZero() {
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return Lease{}, fmt.Errorf("%w: node_id oder valid_until fehlt", ErrInvalid)
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}
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if l.AllowedDomains == nil {
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l.AllowedDomains = []string{}
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}
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if l.Features == nil {
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l.Features = []Feature{}
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}
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if err := l.Verify(pub); err != nil {
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return Lease{}, err
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}
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return l, nil
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}
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