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Andrey K. Choi
2025-10-09 09:57:24 +09:00
commit 4d551bd74f
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output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Cms/EnvelopedDataHelper.cs Normal file
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using System.Collections;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Nist;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Crypto.Utilities;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Cms;
internal class EnvelopedDataHelper
{
private static readonly IDictionary BaseCipherNames;
private static readonly IDictionary MacAlgNames;
static EnvelopedDataHelper()
{
BaseCipherNames = Platform.CreateHashtable();
MacAlgNames = Platform.CreateHashtable();
BaseCipherNames.Add(PkcsObjectIdentifiers.DesEde3Cbc, "DESEDE");
BaseCipherNames.Add(NistObjectIdentifiers.IdAes128Cbc, "AES");
BaseCipherNames.Add(NistObjectIdentifiers.IdAes192Cbc, "AES");
BaseCipherNames.Add(NistObjectIdentifiers.IdAes256Cbc, "AES");
MacAlgNames.Add(PkcsObjectIdentifiers.DesEde3Cbc, "DESEDEMac");
MacAlgNames.Add(NistObjectIdentifiers.IdAes128Cbc, "AESMac");
MacAlgNames.Add(NistObjectIdentifiers.IdAes192Cbc, "AESMac");
MacAlgNames.Add(NistObjectIdentifiers.IdAes256Cbc, "AESMac");
MacAlgNames.Add(PkcsObjectIdentifiers.RC2Cbc, "RC2Mac");
}
public static object CreateContentCipher(bool forEncryption, ICipherParameters encKey, AlgorithmIdentifier encryptionAlgID)
{
return CipherFactory.CreateContentCipher(forEncryption, encKey, encryptionAlgID);
}
public AlgorithmIdentifier GenerateEncryptionAlgID(DerObjectIdentifier encryptionOID, KeyParameter encKey, SecureRandom random)
{
return AlgorithmIdentifierFactory.GenerateEncryptionAlgID(encryptionOID, encKey.GetKey().Length * 8, random);
}
public CipherKeyGenerator CreateKeyGenerator(DerObjectIdentifier algorithm, SecureRandom random)
{
return CipherKeyGeneratorFactory.CreateKeyGenerator(algorithm, random);
}
}