KekRecipientInformation
using Org.BouncyCastle.Asn1.Cms;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Security;
namespace Org.BouncyCastle.Cms
{
public class KekRecipientInformation : RecipientInformation
{
private KekRecipientInfo info;
internal KekRecipientInformation(KekRecipientInfo info, CmsSecureReadable secureReadable)
: base(info.KeyEncryptionAlgorithm, secureReadable)
{
this.info = info;
rid = new RecipientID();
KekIdentifier kekID = info.KekID;
rid.KeyIdentifier = kekID.KeyIdentifier.GetOctets();
}
public override CmsTypedStream GetContentStream(ICipherParameters key)
{
try {
byte[] octets = info.EncryptedKey.GetOctets();
IWrapper wrapper = WrapperUtilities.GetWrapper(keyEncAlg.Algorithm.Id);
wrapper.Init(false, key);
KeyParameter sKey = ParameterUtilities.CreateKeyParameter(GetContentAlgorithmName(), wrapper.Unwrap(octets, 0, octets.Length));
return GetContentFromSessionKey(sKey);
} catch (SecurityUtilityException innerException) {
throw new CmsException("couldn't create cipher.", innerException);
} catch (InvalidKeyException innerException2) {
throw new CmsException("key invalid in message.", innerException2);
}
}
}
}