EnvelopedCms Sınıfı

Constructor
Şöyle yaparız.

byte[] data = new byte[256];
...
ContentInfo contentInfo = new ContentInfo(data);
EnvelopedCms envelopedCms = new EnvelopedCms(contentInfo,new AlgorithmIdentifier(
  new System.Security.Cryptography.Oid("2.16.840.1.101.3.4.1.42")));

Decode metodu
Şöyle yaparız.

//lets decrypt now
envelopedCms.Decode(encryptedData);
envelopedCms.Decrypt(fcollection);
byte[] decryptedData = envelopedCms.ContentInfo.Content;

Encode metodu

Şöyle yaparız.

byte[] encryptedData = envelopedCms.Encode();

Encrypt metodu
Şöyle yaparız.

X509Certificate2Collection collection = ...;

CmsRecipientCollection recipients = new CmsRecipientCollection(
  SubjectIdentifierType.IssuerAndSerialNumber, collection);
envelopedCms.Encrypt(recipients);