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package org.spongycastle.crypto.tls;
import java.io.IOException;
import org.spongycastle.crypto.BlockCipher;
import org.spongycastle.crypto.Digest;
import org.spongycastle.crypto.Mac;
import org.spongycastle.crypto.StreamCipher;
import org.spongycastle.crypto.digests.MD5Digest;
import org.spongycastle.crypto.digests.SHA1Digest;
import org.spongycastle.crypto.digests.SHA256Digest;
import org.spongycastle.crypto.digests.SHA384Digest;
import org.spongycastle.crypto.digests.SHA512Digest;
import org.spongycastle.crypto.engines.AESFastEngine;
import org.spongycastle.crypto.engines.CamelliaEngine;
import org.spongycastle.crypto.engines.DESedeEngine;
import org.spongycastle.crypto.engines.RC4Engine;
import org.spongycastle.crypto.engines.SEEDEngine;
import org.spongycastle.crypto.engines.Salsa20Engine;
import org.spongycastle.crypto.macs.HMac;
import org.spongycastle.crypto.modes.AEADBlockCipher;
import org.spongycastle.crypto.modes.CBCBlockCipher;
import org.spongycastle.crypto.modes.CCMBlockCipher;
import org.spongycastle.crypto.modes.GCMBlockCipher;
public class DefaultTlsCipherFactory
extends AbstractTlsCipherFactory
{
public TlsCipher createCipher(TlsContext context, int encryptionAlgorithm, int macAlgorithm)
throws IOException
{
switch (encryptionAlgorithm)
{
case EncryptionAlgorithm._3DES_EDE_CBC:
return createDESedeCipher(context, macAlgorithm);
case EncryptionAlgorithm.AES_128_CBC:
return createAESCipher(context, 16, macAlgorithm);
case EncryptionAlgorithm.AES_128_CCM:
// NOTE: Ignores macAlgorithm
return createCipher_AES_CCM(context, 16, 16);
case EncryptionAlgorithm.AES_128_CCM_8:
// NOTE: Ignores macAlgorithm
return createCipher_AES_CCM(context, 16, 8);
case EncryptionAlgorithm.AES_256_CCM:
// NOTE: Ignores macAlgorithm
return createCipher_AES_CCM(context, 32, 16);
case EncryptionAlgorithm.AES_256_CCM_8:
// NOTE: Ignores macAlgorithm
return createCipher_AES_CCM(context, 32, 8);
case EncryptionAlgorithm.AES_128_GCM:
// NOTE: Ignores macAlgorithm
return createCipher_AES_GCM(context, 16, 16);
case EncryptionAlgorithm.AES_256_CBC:
return createAESCipher(context, 32, macAlgorithm);
case EncryptionAlgorithm.AES_256_GCM:
// NOTE: Ignores macAlgorithm
return createCipher_AES_GCM(context, 32, 16);
case EncryptionAlgorithm.CAMELLIA_128_CBC:
return createCamelliaCipher(context, 16, macAlgorithm);
case EncryptionAlgorithm.CAMELLIA_256_CBC:
return createCamelliaCipher(context, 32, macAlgorithm);
case EncryptionAlgorithm.ESTREAM_SALSA20:
return createSalsa20Cipher(context, 12, 32, macAlgorithm);
case EncryptionAlgorithm.NULL:
return createNullCipher(context, macAlgorithm);
case EncryptionAlgorithm.RC4_128:
return createRC4Cipher(context, 16, macAlgorithm);
case EncryptionAlgorithm.SALSA20:
return createSalsa20Cipher(context, 20, 32, macAlgorithm);
case EncryptionAlgorithm.SEED_CBC:
return createSEEDCipher(context, macAlgorithm);
default:
throw new TlsFatalAlert(AlertDescription.internal_error);
}
}
protected TlsBlockCipher createAESCipher(TlsContext context, int cipherKeySize, int macAlgorithm)
throws IOException
{
return new TlsBlockCipher(context, createAESBlockCipher(), createAESBlockCipher(),
createHMACDigest(macAlgorithm), createHMACDigest(macAlgorithm), cipherKeySize);
}
protected TlsAEADCipher createCipher_AES_CCM(TlsContext context, int cipherKeySize, int macSize)
throws IOException
{
return new TlsAEADCipher(context, createAEADBlockCipher_AES_CCM(),
createAEADBlockCipher_AES_CCM(), cipherKeySize, macSize);
}
protected TlsAEADCipher createCipher_AES_GCM(TlsContext context, int cipherKeySize, int macSize)
throws IOException
{
return new TlsAEADCipher(context, createAEADBlockCipher_AES_GCM(),
createAEADBlockCipher_AES_GCM(), cipherKeySize, macSize);
}
protected TlsBlockCipher createCamelliaCipher(TlsContext context, int cipherKeySize, int macAlgorithm)
throws IOException
{
return new TlsBlockCipher(context, createCamelliaBlockCipher(),
createCamelliaBlockCipher(), createHMACDigest(macAlgorithm),
createHMACDigest(macAlgorithm), cipherKeySize);
}
protected TlsBlockCipher createDESedeCipher(TlsContext context, int macAlgorithm)
throws IOException
{
return new TlsBlockCipher(context, createDESedeBlockCipher(), createDESedeBlockCipher(),
createHMACDigest(macAlgorithm), createHMACDigest(macAlgorithm), 24);
}
protected TlsNullCipher createNullCipher(TlsContext context, int macAlgorithm)
throws IOException
{
return new TlsNullCipher(context, createHMACDigest(macAlgorithm),
createHMACDigest(macAlgorithm));
}
protected TlsStreamCipher createRC4Cipher(TlsContext context, int cipherKeySize, int macAlgorithm)
throws IOException
{
return new TlsStreamCipher(context, createRC4StreamCipher(), createRC4StreamCipher(),
createHMACDigest(macAlgorithm), createHMACDigest(macAlgorithm), cipherKeySize);
}
protected TlsStreamCipher createSalsa20Cipher(TlsContext context, int rounds, int cipherKeySize, int macAlgorithm)
throws IOException
{
/*
* TODO To be able to support UMAC96, we need to give the TlsStreamCipher a Mac instead of
* assuming HMAC and passing a digest.
*/
return new TlsStreamCipher(context, createSalsa20StreamCipher(rounds), createSalsa20StreamCipher(rounds),
createHMACDigest(macAlgorithm), createHMACDigest(macAlgorithm), cipherKeySize);
}
protected TlsBlockCipher createSEEDCipher(TlsContext context, int macAlgorithm)
throws IOException
{
return new TlsBlockCipher(context, createSEEDBlockCipher(), createSEEDBlockCipher(),
createHMACDigest(macAlgorithm), createHMACDigest(macAlgorithm), 16);
}
protected BlockCipher createAESBlockCipher()
{
return new CBCBlockCipher(new AESFastEngine());
}
protected AEADBlockCipher createAEADBlockCipher_AES_CCM()
{
return new CCMBlockCipher(new AESFastEngine());
}
protected AEADBlockCipher createAEADBlockCipher_AES_GCM()
{
// TODO Consider allowing custom configuration of multiplier
return new GCMBlockCipher(new AESFastEngine());
}
protected BlockCipher createCamelliaBlockCipher()
{
return new CBCBlockCipher(new CamelliaEngine());
}
protected BlockCipher createDESedeBlockCipher()
{
return new CBCBlockCipher(new DESedeEngine());
}
protected StreamCipher createRC4StreamCipher()
{
return new RC4Engine();
}
protected StreamCipher createSalsa20StreamCipher(int rounds)
{
return new Salsa20Engine(rounds);
}
protected BlockCipher createSEEDBlockCipher()
{
return new CBCBlockCipher(new SEEDEngine());
}
protected Digest createHMACDigest(int macAlgorithm) throws IOException
{
switch (macAlgorithm)
{
case MACAlgorithm._null:
return null;
case MACAlgorithm.hmac_md5:
return new MD5Digest();
case MACAlgorithm.hmac_sha1:
return new SHA1Digest();
case MACAlgorithm.hmac_sha256:
return new SHA256Digest();
case MACAlgorithm.hmac_sha384:
return new SHA384Digest();
case MACAlgorithm.hmac_sha512:
return new SHA512Digest();
default:
throw new TlsFatalAlert(AlertDescription.internal_error);
}
}
protected Mac createMac(int macAlgorithm) throws IOException
{
switch (macAlgorithm)
{
// TODO Need an implementation of UMAC
// case MACAlgorithm.umac96:
// return
default:
return new HMac(createHMACDigest(macAlgorithm));
}
}
}
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