CmsContentEncryptorBuilder
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Nist;
using Org.BouncyCastle.Asn1.Ntt;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Operators;
using System.Collections.Generic;
namespace Org.BouncyCastle.Operators
{
public class CmsContentEncryptorBuilder
{
private static readonly IDictionary<DerObjectIdentifier, int> KeySizes;
private readonly DerObjectIdentifier encryptionOID;
private readonly int keySize;
static CmsContentEncryptorBuilder()
{
KeySizes = new Dictionary<DerObjectIdentifier, int>();
KeySizes[NistObjectIdentifiers.IdAes128Cbc] = 128;
KeySizes[NistObjectIdentifiers.IdAes192Cbc] = 192;
KeySizes[NistObjectIdentifiers.IdAes256Cbc] = 256;
KeySizes[NttObjectIdentifiers.IdCamellia128Cbc] = 128;
KeySizes[NttObjectIdentifiers.IdCamellia192Cbc] = 192;
KeySizes[NttObjectIdentifiers.IdCamellia256Cbc] = 256;
}
private static int GetKeySize(DerObjectIdentifier oid)
{
if (!KeySizes.TryGetValue(oid, out int value))
return -1;
return value;
}
public CmsContentEncryptorBuilder(DerObjectIdentifier encryptionOID)
: this(encryptionOID, GetKeySize(encryptionOID))
{
}
public CmsContentEncryptorBuilder(DerObjectIdentifier encryptionOID, int keySize)
{
this.encryptionOID = encryptionOID;
this.keySize = keySize;
}
public ICipherBuilderWithKey Build()
{
return new Asn1CipherBuilderWithKey(encryptionOID, keySize, null);
}
}
}