Scenario 3.3: Emettere certificato code-signing

Questo scenario descrive l'emissione di un certificato code-signing per la firma di software. Il code-signing consente la verifica dell'origine e dell'integrità di eseguibili, DLL, script e package.

Casi d'uso:

• Windows Authenticode (EXE, DLL, MSI)
• Script PowerShell
• File JAR Java
• Package NuGet
• Code Signing macOS
• Firma firmware

using WvdS.Security.Cryptography.X509Certificates.Extensions.PQ;
 
using var ctx = PqCryptoContext.Initialize();
 
var caCert = ctx.LoadCertificate("codesign-ca.crt.pem");
var caKey = ctx.LoadPrivateKey("codesign-ca.key.pem", "CaPassword!");
 
var csr = ctx.LoadCertificateRequest(File.ReadAllText("codesign.csr.pem"));
csr.VerifySignature();
 
// Code-Signing-Zertifikat ausstellen
var codesignCert = ctx.IssueCertificate(
    csr,
    issuerCert: caCert,
    issuerKey: caKey,
    serialNumber: ctx.GenerateSerialNumber(),
    validDays: 730,  // 2 Jahre
    extensions: new ExtBuilder()
        .BasicConstraints(ca: false, critical: true)
        // Key Usage: Nur digitalSignature!
        .KeyUsage(KeyUsageFlags.DigitalSignature, critical: true)
        // Extended Key Usage: Code Signing
        .ExtendedKeyUsage(ExtKeyUsage.CodeSigning)
        .SubjectKeyIdentifier(csr.PublicKey)
        .AuthorityKeyIdentifier(caCert)
        // Timestamping URL für Langzeit-Validierung
        .AuthorityInfoAccess(
            ocspUrl: "http://ocsp.example.com",
            timestampUrl: "http://timestamp.example.com"
        )
        .Build()
);
 
codesignCert.ToPemFile("codesign.crt.pem");

# Mit SignTool und PQ-Zertifikat
signtool sign /fd SHA256 /f codesign.pfx /p "Password" /tr http://timestamp.example.com /td SHA256 myapp.exe
 
# Signatur prüfen
signtool verify /pa /v myapp.exe

« ← 3.2 Certificato client | ↑ Panoramica certificati | 3.4 Certificato S/MIME → »

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