====== Upravljanje certifikatima ======

Kompaktni primjeri za upravljanje certifikatima. → **Detalji:** [[..:verwaltung:start|Scenariji upravljanja]]

----

===== Obnova certifikata (isti ključ) =====

<code csharp>
var caCert = new X509Certificate2("intermediate-ca.pfx", "lozinka");
var oldCert = new X509Certificate2("server.pfx", "lozinka");

var privateKey = oldCert.GetECDsaPrivateKey();

var request = new CertificateRequest(
    oldCert.SubjectName, (ECDsa)privateKey, HashAlgorithmName.SHA384);

// Preuzimanje proširenja (osim SKI)
foreach (var ext in oldCert.Extensions)
    if (ext.Oid?.Value != "2.5.29.14")
        request.CertificateExtensions.Add(ext);

// Nova serijska oznaka
var serial = new byte[20];
RandomNumberGenerator.Fill(serial);
serial[0] &= 0x7F;

var renewedCert = request.Create(caCert,
    DateTimeOffset.UtcNow, DateTimeOffset.UtcNow.AddYears(1), serial);
</code>

→ **Detalji:** [[..:verwaltung:renewal|Renewal]]

----

===== Re-Key (novi ključ) =====

<code csharp>
var oldCert = new X509Certificate2("server.crt");
using var newKey = ECDsa.Create(ECCurve.NamedCurves.nistP384);

var request = new CertificateRequest(
    oldCert.SubjectName, newKey, HashAlgorithmName.SHA384);

// Preuzimanje SAN-ova i EKU
if (oldCert.Extensions["2.5.29.17"] is { } san)
    request.CertificateExtensions.Add(san);
if (oldCert.Extensions["2.5.29.37"] is { } eku)
    request.CertificateExtensions.Add(eku);

// Kreiranje novog certifikata, opoziv starog!
</code>

→ **Detalji:** [[..:verwaltung:rekey|Re-Key]]

----

===== Kreiranje CRL =====

<code csharp>
var caCert = new X509Certificate2("intermediate-ca.pfx", "lozinka");
var crlBuilder = new CertificateRevocationListBuilder();

crlBuilder.AddEntry(
    serialNumber: new byte[] { 0x01, 0x23, 0x45 },
    revocationTime: DateTimeOffset.UtcNow,
    reason: X509RevocationReason.KeyCompromise);

var crl = crlBuilder.Build(caCert,
    crlNumber: BitConverter.GetBytes(1L),
    nextUpdate: DateTimeOffset.UtcNow.AddDays(7),
    HashAlgorithmName.SHA384);

File.WriteAllBytes("intermediate.crl", crl);
</code>

→ **Detalji:** [[..:widerruf:crl_erstellen|Kreiranje CRL]]

----

===== Kontrolna lista =====

**Prije isteka (30 dana):**
  * Planirati obnovu
  * Odlučiti Renewal ili Re-Key

**Pri kompromitaciji:**
  * Odmah Re-Key (novi ključ!)
  * Opozvati stari certifikat
  * Ažurirati CRL

----

<< [[.:start|← Kratka referenca]] | [[..:verwaltung:start|→ Scenariji upravljanja (Detalji)]] >>

----
//Wolfgang van der Stille @ EMSR DATA d.o.o. - Post-Quantum Cryptography Professional//

{{tag>kurzreferenz verwaltung renewal rekey crl}}