package org.bouncycastle.crypto.tls;
import java.io.IOException;
import org.bouncycastle.crypto.InvalidCipherTextException;
import org.bouncycastle.crypto.encodings.PKCS1Encoding;
import org.bouncycastle.crypto.engines.RSABlindedEngine;
import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
import org.bouncycastle.crypto.params.ParametersWithRandom;
import org.bouncycastle.crypto.params.RSAKeyParameters;
public class DefaultTlsEncryptionCredentials
implements TlsEncryptionCredentials
{
protected TlsContext context;
protected Certificate certificate;
protected AsymmetricKeyParameter privateKey;
public DefaultTlsEncryptionCredentials(TlsContext context, Certificate certificate,
AsymmetricKeyParameter privateKey)
{
if (certificate == null)
{
throw new IllegalArgumentException("'certificate' cannot be null");
}
if (certificate.isEmpty())
{
throw new IllegalArgumentException("'certificate' cannot be empty");
}
if (privateKey == null)
{
throw new IllegalArgumentException("'privateKey' cannot be null");
}
if (!privateKey.isPrivate())
{
throw new IllegalArgumentException("'privateKey' must be private");
}
if (privateKey instanceof RSAKeyParameters)
{
}
else
{
throw new IllegalArgumentException("'privateKey' type not supported: "
+ privateKey.getClass().getName());
}
this.context = context;
this.certificate = certificate;
this.privateKey = privateKey;
}
public Certificate getCertificate()
{
return certificate;
}
public byte[] decryptPreMasterSecret(byte[] encryptedPreMasterSecret)
throws IOException
{
PKCS1Encoding encoding = new PKCS1Encoding(new RSABlindedEngine());
encoding.init(false, new ParametersWithRandom(this.privateKey, context.getSecureRandom()));
try
{
return encoding.processBlock(encryptedPreMasterSecret, 0,
encryptedPreMasterSecret.length);
}
catch (InvalidCipherTextException e)
{
throw new TlsFatalAlert(AlertDescription.illegal_parameter);
}
}
}