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package org.spongycastle.crypto.tls;
import java.io.IOException;
import java.util.Hashtable;
import org.spongycastle.util.Arrays;
public abstract class SRPTlsClient
extends AbstractTlsClient
{
/**
* @deprecated use TlsSRPUtils.EXT_SRP instead
*/
public static final Integer EXT_SRP = TlsSRPUtils.EXT_SRP;
protected byte[] identity;
protected byte[] password;
public SRPTlsClient(byte[] identity, byte[] password)
{
super();
this.identity = Arrays.clone(identity);
this.password = Arrays.clone(password);
}
public SRPTlsClient(TlsCipherFactory cipherFactory, byte[] identity, byte[] password)
{
super(cipherFactory);
this.identity = Arrays.clone(identity);
this.password = Arrays.clone(password);
}
public int[] getCipherSuites()
{
return new int[] { CipherSuite.TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA };
}
public Hashtable getClientExtensions()
throws IOException
{
Hashtable clientExtensions = TlsExtensionsUtils.ensureExtensionsInitialised(super.getClientExtensions());
TlsSRPUtils.addSRPExtension(clientExtensions, this.identity);
return clientExtensions;
}
public void processServerExtensions(Hashtable serverExtensions)
throws IOException
{
if (!TlsUtils.hasExpectedEmptyExtensionData(serverExtensions, TlsSRPUtils.EXT_SRP, AlertDescription.illegal_parameter))
{
// No explicit guidance in RFC 5054 here; we allow an optional empty extension from server
}
}
public TlsKeyExchange getKeyExchange()
throws IOException
{
switch (selectedCipherSuite)
{
case CipherSuite.TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_SRP_SHA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_SRP_SHA_WITH_AES_256_CBC_SHA:
return createSRPKeyExchange(KeyExchangeAlgorithm.SRP);
case CipherSuite.TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA:
return createSRPKeyExchange(KeyExchangeAlgorithm.SRP_RSA);
case CipherSuite.TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA:
return createSRPKeyExchange(KeyExchangeAlgorithm.SRP_DSS);
default:
/*
* Note: internal error here; the TlsProtocol implementation verifies that the
* server-selected cipher suite was in the list of client-offered cipher suites, so if
* we now can't produce an implementation, we shouldn't have offered it!
*/
throw new TlsFatalAlert(AlertDescription.internal_error);
}
}
public TlsCipher getCipher()
throws IOException
{
switch (selectedCipherSuite)
{
case CipherSuite.TLS_SRP_SHA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_SRP_SHA_RSA_WITH_3DES_EDE_CBC_SHA:
case CipherSuite.TLS_SRP_SHA_DSS_WITH_3DES_EDE_CBC_SHA:
return cipherFactory.createCipher(context, EncryptionAlgorithm._3DES_EDE_CBC, MACAlgorithm.hmac_sha1);
case CipherSuite.TLS_SRP_SHA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_SRP_SHA_RSA_WITH_AES_128_CBC_SHA:
case CipherSuite.TLS_SRP_SHA_DSS_WITH_AES_128_CBC_SHA:
return cipherFactory.createCipher(context, EncryptionAlgorithm.AES_128_CBC, MACAlgorithm.hmac_sha1);
case CipherSuite.TLS_SRP_SHA_WITH_AES_256_CBC_SHA:
case CipherSuite.TLS_SRP_SHA_RSA_WITH_AES_256_CBC_SHA:
case CipherSuite.TLS_SRP_SHA_DSS_WITH_AES_256_CBC_SHA:
return cipherFactory.createCipher(context, EncryptionAlgorithm.AES_256_CBC, MACAlgorithm.hmac_sha1);
default:
/*
* Note: internal error here; the TlsProtocol implementation verifies that the
* server-selected cipher suite was in the list of client-offered cipher suites, so if
* we now can't produce an implementation, we shouldn't have offered it!
*/
throw new TlsFatalAlert(AlertDescription.internal_error);
}
}
protected TlsKeyExchange createSRPKeyExchange(int keyExchange)
{
return new TlsSRPKeyExchange(keyExchange, supportedSignatureAlgorithms, identity, password);
}
}
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