====== Digitalni potpisi ======

Kompaktni primjeri za potpise. → **Detalji:** [[..:signaturen:start|Scenariji potpisa]]

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===== RSA hibridni potpis =====

<code csharp>
using var rsa = RSA.Create(4096);
byte[] data = Encoding.UTF8.GetBytes("Podaci za potpisivanje");

// Hibridni potpis (RSA + ML-DSA)
byte[] signature = rsa.SignData(data,
    HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1,
    CryptoMode.Hybrid);

// Verifikacija
bool valid = rsa.VerifyData(data, signature,
    HashAlgorithmName.SHA256, RSASignaturePadding.Pkcs1,
    CryptoMode.Hybrid);
</code>

----

===== ECDSA hibridni potpis =====

<code csharp>
using var ecdsa = ECDsa.Create(ECCurve.NamedCurves.nistP384);
byte[] data = Encoding.UTF8.GetBytes("Podaci za potpisivanje");

byte[] signature = ecdsa.SignData(data,
    HashAlgorithmName.SHA384, CryptoMode.Hybrid);

bool valid = ecdsa.VerifyData(data, signature,
    HashAlgorithmName.SHA384, CryptoMode.Hybrid);
</code>

----

===== CMS/PKCS#7 potpis =====

<code csharp>
var cert = new X509Certificate2("signing.pfx", "lozinka");
byte[] content = File.ReadAllBytes("document.pdf");

var contentInfo = new ContentInfo(content);
var signedCms = new SignedCms(contentInfo, detached: true);

var signer = new CmsSigner(cert);
signer.DigestAlgorithm = new Oid("2.16.840.1.101.3.4.2.1"); // SHA-256

signedCms.ComputeSignature(signer, CryptoMode.Hybrid);
byte[] signature = signedCms.Encode();
</code>

→ **Detalji:** [[..:signaturen:dokument_signieren|Potpisivanje dokumenta]]

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===== Verifikacija potpisa =====

<code csharp>
var signedCms = new SignedCms();
signedCms.Decode(signatureBytes);
signedCms.CheckSignature(verifySignatureOnly: true);

foreach (var signerInfo in signedCms.SignerInfos)
{
    var cert = signerInfo.Certificate;
    bool hasPq = cert.HasPqSignature();
}
</code>

→ **Detalji:** [[..:signaturen:signatur_verifizieren|Verifikacija potpisa]]

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===== Tipovi potpisa =====

^  Tip  ^  Upotreba  ^  API  ^
| RSA Hybrid | Legacy-kompatibilnost | RsaExtensions |
| ECDSA Hybrid | Moderno, kompaktno | ECDsaExtensions |
| ML-DSA Pure | PQ-only | MlDsaSigner |
| CMS/PKCS#7 | Dokumenti | SignedCmsExtensions |

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

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

{{tag>kurzreferenz signaturen rsa ecdsa cms hybrid}}