====== Namespace WvdS.System.Security.Cryptography.Signatures ======

Contiene Extension Methods per firme digitali con supporto PQ.

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===== Classi =====

^  Classe  ^  Descrizione  ^
| [[.:signatureextensions|SignatureExtensions]] | Extension per firme RSA, ECDsa e X509Certificate2 |
| [[.:signeddataextensions|SignedDataExtensions]] | Extension per CMS/PKCS#7 SignedCms |
| [[.:hybridsignatureinfo|HybridSignatureInfo]] | Container per dati di firma ibrida |

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===== Classi statiche =====

^  Classe  ^  Descrizione  ^
| [[.:pqsignedcmshelper|PqSignedCmsHelper]] | API high-level per operazioni CMS PQ-ready |

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===== Tipi estesi =====

^  Tipo .NET  ^  Classe Extension  ^
| ''System.Security.Cryptography.RSA''((Microsoft Docs: https://learn.microsoft.com/dotnet/api/system.security.cryptography.rsa)) | SignatureExtensions |
| ''System.Security.Cryptography.ECDsa''((Microsoft Docs: https://learn.microsoft.com/dotnet/api/system.security.cryptography.ecdsa)) | SignatureExtensions |
| ''System.Security.Cryptography.Pkcs.SignedCms''((Microsoft Docs: https://learn.microsoft.com/dotnet/api/system.security.cryptography.pkcs.signedcms)) | SignedDataExtensions |

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===== Formato firma ibrida =====

In modalita Hybrid vengono generate due firme:

<code>
+---------------------------------------------+
| Firma ibrida                                |
+---------------------------------------------+
| [4 Bytes] Lunghezza firma classica          |
| [n Bytes] Firma classica (RSA/ECDSA)        |
| [m Bytes] Firma PQ (ML-DSA)                 |
+---------------------------------------------+
</code>

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===== Esempio =====

<code csharp>
using WvdS.System.Security.Cryptography;
using WvdS.System.Security.Cryptography.Signatures;

CryptoConfig.DefaultMode = CryptoMode.Hybrid;

using var rsa = RSA.Create(2048);
byte[] data = Encoding.UTF8.GetBytes("Dati da firmare");

// Creare firma ibrida
byte[] signature = rsa.SignData(
    data,
    HashAlgorithmName.SHA256,
    RSASignaturePadding.Pkcs1);

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

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===== Vedi anche =====

  * [[..:x509certificates:start|Namespace X509Certificates]]
  * [[..:keyexchange:start|Namespace KeyExchange]]
  * [[..:..:..:start|Panoramica API]]

{{tag>namespace signaturen}}

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