init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Operators/CmsContentEncryptorBuilder.cs

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+using System.Collections;
+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.Nist;
+using Org.BouncyCastle.Asn1.Ntt;
+using Org.BouncyCastle.Cms;
+using Org.BouncyCastle.Crypto;
+using Org.BouncyCastle.Crypto.Operators;
+using Org.BouncyCastle.Utilities;
+
+namespace Org.BouncyCastle.Operators;
+
+public class CmsContentEncryptorBuilder
+{
+	private static readonly IDictionary KeySizes;
+
+	private readonly DerObjectIdentifier encryptionOID;
+
+	private readonly int keySize;
+
+	private readonly EnvelopedDataHelper helper = new EnvelopedDataHelper();
+
+	static CmsContentEncryptorBuilder()
+	{
+		KeySizes = Platform.CreateHashtable();
+		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.Contains(oid))
+		{
+			return (int)KeySizes[oid];
+		}
+		return -1;
+	}
+
+	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);
+	}
+}

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Operators/CmsKeyTransRecipientInfoGenerator.cs

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+using Org.BouncyCastle.Asn1;
+using Org.BouncyCastle.Asn1.Cms;
+using Org.BouncyCastle.Asn1.X509;
+using Org.BouncyCastle.Cms;
+using Org.BouncyCastle.Crypto;
+using Org.BouncyCastle.Crypto.Parameters;
+using Org.BouncyCastle.X509;
+
+namespace Org.BouncyCastle.Operators;
+
+public class CmsKeyTransRecipientInfoGenerator : KeyTransRecipientInfoGenerator
+{
+	private readonly IKeyWrapper keyWrapper;
+
+	protected override AlgorithmIdentifier AlgorithmDetails => (AlgorithmIdentifier)keyWrapper.AlgorithmDetails;
+
+	public CmsKeyTransRecipientInfoGenerator(X509Certificate recipCert, IKeyWrapper keyWrapper)
+		: base(new IssuerAndSerialNumber(recipCert.IssuerDN, new DerInteger(recipCert.SerialNumber)))
+	{
+		this.keyWrapper = keyWrapper;
+		base.RecipientCert = recipCert;
+		base.RecipientPublicKey = recipCert.GetPublicKey();
+	}
+
+	public CmsKeyTransRecipientInfoGenerator(byte[] subjectKeyID, IKeyWrapper keyWrapper)
+		: base(subjectKeyID)
+	{
+		this.keyWrapper = keyWrapper;
+	}
+
+	protected override byte[] GenerateWrappedKey(KeyParameter contentKey)
+	{
+		return keyWrapper.Wrap(contentKey.GetKey()).Collect();
+	}
+}