====== Costruire infrastruttura PKI ======

Guida compatta per costruire una PKI PQ-capable. → **Dettagli:** [[..:pki:start|Scenari PKI]]

----

===== Gerarchia =====

<code>
Root-CA (Offline, ML-DSA-87)
    └── Intermediate-CA (Online, ML-DSA-65)
            ├── Certificati Server (Hybrid: ECDSA + ML-DSA)
            ├── Certificati Client (ML-DSA-65)
            └── Certificati Utente (ML-DSA-65)
</code>

----

===== 1. Root-CA =====

<code csharp>
using var mlDsa = MlDsaSigner.Create(MlDsaParameterSet.MlDsa87);

var rootDn = new X500DistinguishedNameBuilder();
rootDn.AddCommonName("WvdS Root CA");
rootDn.AddOrganizationName("EMSR DATA d.o.o.");

var request = new CertificateRequest(rootDn.Build(), mlDsa, HashAlgorithmName.SHA512);

request.CertificateExtensions.Add(
    new X509BasicConstraintsExtension(true, true, 2, true));
request.CertificateExtensions.Add(
    new X509KeyUsageExtension(
        X509KeyUsageFlags.KeyCertSign | X509KeyUsageFlags.CrlSign, true));

var rootCert = request.CreateSelfSigned(
    DateTimeOffset.UtcNow, DateTimeOffset.UtcNow.AddYears(20));

File.WriteAllBytes("root-ca.pfx", rootCert.Export(X509ContentType.Pfx, "password"));
</code>

→ **Dettagli:** [[..:pki:root_ca_erstellen|Creare Root-CA]]

----

===== 2. Intermediate-CA =====

<code csharp>
var rootCert = new X509Certificate2("root-ca.pfx", "password");
using var mlDsa = MlDsaSigner.Create(MlDsaParameterSet.MlDsa65);

var dn = new X500DistinguishedNameBuilder();
dn.AddCommonName("WvdS Intermediate CA");

var csr = new CertificateRequest(dn.Build(), mlDsa, HashAlgorithmName.SHA384);
csr.CertificateExtensions.Add(new X509BasicConstraintsExtension(true, true, 0, true));
csr.CertificateExtensions.Add(
    new X509KeyUsageExtension(
        X509KeyUsageFlags.KeyCertSign | X509KeyUsageFlags.CrlSign, true));

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

var intCert = csr.Create(rootCert, DateTimeOffset.UtcNow,
    DateTimeOffset.UtcNow.AddYears(10), serial);
</code>

→ **Dettagli:** [[..:pki:intermediate_ca_erstellen|Creare Intermediate-CA]]

----

===== 3. Trust Store =====

<code csharp>
var store = new X509Store(StoreName.Root, StoreLocation.LocalMachine);
store.Open(OpenFlags.ReadWrite);
store.Add(new X509Certificate2("root-ca.crt"));
store.Close();
</code>

→ **Dettagli:** [[..:pki:trust_store_konfigurieren|Configurare Trust Store]]

----

===== Raccomandazioni =====

^  Componente  ^  Algoritmo  ^  Validita  ^
| Root-CA | ML-DSA-87 | 20-30 anni |
| Intermediate-CA | ML-DSA-65 | 5-10 anni |
| End-Entity | Hybrid o ML-DSA-65 | 1-2 anni |

----

<< [[.:start|← Riferimento rapido]] | [[..:pki:start|→ Scenari PKI (Dettagli)]] >>

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

{{tag>kurzreferenz pki root-ca intermediate-ca}}