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using System;
using System.IO;
using Org.BouncyCastle.Tls.Crypto;
namespace Org.BouncyCastle.Tls
{
public class PskTlsClient
: AbstractTlsClient
{
private static readonly int[] DefaultCipherSuites = new int[]
{
CipherSuite.TLS_ECDHE_PSK_WITH_CHACHA20_POLY1305_SHA256,
CipherSuite.TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA256,
CipherSuite.TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA,
CipherSuite.TLS_DHE_PSK_WITH_CHACHA20_POLY1305_SHA256,
CipherSuite.TLS_DHE_PSK_WITH_AES_128_GCM_SHA256,
CipherSuite.TLS_DHE_PSK_WITH_AES_128_CBC_SHA256,
CipherSuite.TLS_DHE_PSK_WITH_AES_128_CBC_SHA
};
protected readonly TlsPskIdentity m_pskIdentity;
public PskTlsClient(TlsCrypto crypto, byte[] identity, byte[] psk)
: this(crypto, new BasicTlsPskIdentity(identity, psk))
{
}
public PskTlsClient(TlsCrypto crypto, TlsPskIdentity pskIdentity)
: base(crypto)
{
this.m_pskIdentity = pskIdentity;
}
protected override ProtocolVersion[] GetSupportedVersions()
{
return ProtocolVersion.TLSv12.Only();
}
protected override int[] GetSupportedCipherSuites()
{
return TlsUtilities.GetSupportedCipherSuites(Crypto, DefaultCipherSuites);
}
public override TlsPskIdentity GetPskIdentity()
{
return m_pskIdentity;
}
/// <exception cref="IOException"/>
public override TlsAuthentication GetAuthentication()
{
/*
* Note: This method is not called unless a server certificate is sent, which may be the
* case e.g. for RSA_PSK key exchange.
*/
throw new TlsFatalAlert(AlertDescription.internal_error);
}
}
}
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