/**
* Parse a {@link ServerDHParams} from a {@link Stream}.
*
* @param input
* the {@link Stream} to parse from.
* @return a {@link ServerDHParams} object.
* @throws IOException
*/
public static ServerDHParams Parse(Stream input)
{
BigInteger p = TlsDHUtilities.ReadDHParameter(input);
BigInteger g = TlsDHUtilities.ReadDHParameter(input);
BigInteger Ys = TlsDHUtilities.ReadDHParameter(input);
return(new ServerDHParams(
TlsDHUtilities.ValidateDHPublicKey(new DHPublicKeyParameters(Ys, new DHParameters(p, g)))));
}
public override void ProcessClientKeyExchange(Stream input)
{
if (mDHAgreePublicKey != null)
{
// For dss_fixed_dh and rsa_fixed_dh, the key arrived in the client certificate
return;
}
BigInteger Yc = TlsDHUtilities.ReadDHParameter(input);
this.mDHAgreePublicKey = TlsDHUtilities.ValidateDHPublicKey(new DHPublicKeyParameters(Yc, mDHParameters));
}
public override void ProcessClientKeyExchange(Stream input)
{
byte[] psk_identity = TlsUtilities.ReadOpaque16(input);
this.mPsk = mPskIdentityManager.GetPsk(psk_identity);
if (mPsk == null)
{
throw new TlsFatalAlert(AlertDescription.unknown_psk_identity);
}
mContext.SecurityParameters.pskIdentity = psk_identity;
if (this.mKeyExchange == KeyExchangeAlgorithm.DHE_PSK)
{
BigInteger Yc = TlsDHUtilities.ReadDHParameter(input);
this.mDHAgreePublicKey = TlsDHUtilities.ValidateDHPublicKey(new DHPublicKeyParameters(Yc, mDHParameters));
}
else if (this.mKeyExchange == KeyExchangeAlgorithm.ECDHE_PSK)
{
byte[] point = TlsUtilities.ReadOpaque8(input);
ECDomainParameters curve_params = this.mECAgreePrivateKey.Parameters;
this.mECAgreePublicKey = TlsEccUtilities.ValidateECPublicKey(TlsEccUtilities.DeserializeECPublicKey(
mServerECPointFormats, curve_params, point));
}
else if (this.mKeyExchange == KeyExchangeAlgorithm.RSA_PSK)
{
byte[] encryptedPreMasterSecret;
if (TlsUtilities.IsSsl(mContext))
{
// TODO Do any SSLv3 clients actually include the length?
encryptedPreMasterSecret = Streams.ReadAll(input);
}
else
{
encryptedPreMasterSecret = TlsUtilities.ReadOpaque16(input);
}
this.mPremasterSecret = mServerCredentials.DecryptPreMasterSecret(encryptedPreMasterSecret);
}
}