TlsImplUtilities
Useful utility methods.
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Tls.Crypto.Impl
{
public abstract class TlsImplUtilities
{
public static bool IsSsl(TlsCryptoParameters cryptoParams)
{
return cryptoParams.ServerVersion.IsSsl;
}
public static bool IsTlsV10(ProtocolVersion version)
{
return ProtocolVersion.TLSv10.IsEqualOrEarlierVersionOf(version.GetEquivalentTlsVersion());
}
public static bool IsTlsV10(TlsCryptoParameters cryptoParams)
{
return IsTlsV10(cryptoParams.ServerVersion);
}
public static bool IsTlsV11(ProtocolVersion version)
{
return ProtocolVersion.TLSv11.IsEqualOrEarlierVersionOf(version.GetEquivalentTlsVersion());
}
public static bool IsTlsV11(TlsCryptoParameters cryptoParams)
{
return IsTlsV11(cryptoParams.ServerVersion);
}
public static bool IsTlsV12(ProtocolVersion version)
{
return ProtocolVersion.TLSv12.IsEqualOrEarlierVersionOf(version.GetEquivalentTlsVersion());
}
public static bool IsTlsV12(TlsCryptoParameters cryptoParams)
{
return IsTlsV12(cryptoParams.ServerVersion);
}
public static bool IsTlsV13(ProtocolVersion version)
{
return ProtocolVersion.TLSv13.IsEqualOrEarlierVersionOf(version.GetEquivalentTlsVersion());
}
public static bool IsTlsV13(TlsCryptoParameters cryptoParams)
{
return IsTlsV13(cryptoParams.ServerVersion);
}
public static byte[] CalculateKeyBlock(TlsCryptoParameters cryptoParams, int length)
{
SecurityParameters securityParameters = cryptoParams.SecurityParameters;
TlsSecret masterSecret = securityParameters.MasterSecret;
int prfAlgorithm = securityParameters.PrfAlgorithm;
byte[] seed = Arrays.Concatenate(securityParameters.ServerRandom, securityParameters.ClientRandom);
return masterSecret.DeriveUsingPrf(prfAlgorithm, "key expansion", seed, length).Extract();
}
}
}