public static byte[] GetVerifyData(Version version, HandshakeInfo handshakeInfo, bool client, bool isClientFinished,
byte[] handshakeHash)
{
if (version == null)
{
throw new ArgumentNullException(nameof(version));
}
if (handshakeInfo == null)
{
throw new ArgumentNullException(nameof(handshakeInfo));
}
if (handshakeHash == null)
{
throw new ArgumentNullException(nameof(handshakeHash));
}
TlsContext context = new DTLSContext(client, version, handshakeInfo);
var asciiLabel = isClientFinished ? ExporterLabel.client_finished : ExporterLabel.server_finished;
return(TlsUtilities.IsTlsV11(context) ?
TlsUtilities.PRF_legacy(handshakeInfo.MasterSecret, asciiLabel, handshakeHash, 12)
: TlsUtilities.PRF(context, handshakeInfo.MasterSecret, asciiLabel, handshakeHash, 12));
}
public static TlsCipher AssignCipher(byte[] preMasterSecret, bool client, Version version, HandshakeInfo handshakeInfo)
{
if (preMasterSecret == null)
{
throw new ArgumentNullException(nameof(preMasterSecret));
}
if (version == null)
{
throw new ArgumentNullException(nameof(version));
}
if (handshakeInfo == null)
{
throw new ArgumentNullException(nameof(handshakeInfo));
}
TlsContext context = new DTLSContext(client, version, handshakeInfo);
var securityParameters = context.SecurityParameters;
var seed = securityParameters.ClientRandom.Concat(securityParameters.ServerRandom).ToArray();
var asciiLabel = ExporterLabel.master_secret;
handshakeInfo.MasterSecret = TlsUtilities.IsTlsV11(context) ?
TlsUtilities.PRF_legacy(preMasterSecret, asciiLabel, seed, 48)
: TlsUtilities.PRF(context, preMasterSecret, asciiLabel, seed, 48);
seed = securityParameters.ServerRandom.Concat(securityParameters.ClientRandom).ToArray();
var key_block = TlsUtilities.IsTlsV11(context) ?
TlsUtilities.PRF_legacy(handshakeInfo.MasterSecret, ExporterLabel.key_expansion, seed, 96)
: TlsUtilities.PRF(context, handshakeInfo.MasterSecret, ExporterLabel.key_expansion, seed, 96);
return(_CipherFactory
.CreateCipher(context, _GetEncryptionAlgorithm(handshakeInfo.CipherSuite), _GetMACAlgorithm(handshakeInfo.CipherSuite)));
}
public static byte[] CalculateKeyBlock(TlsContext context, int size)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (size < 0)
{
throw new ArgumentOutOfRangeException(nameof(size));
}
var securityParameters = context.SecurityParameters;
var master_secret = securityParameters.MasterSecret;
var seed = securityParameters.ServerRandom.Concat(securityParameters.ClientRandom).ToArray();
return(TlsUtilities.IsTlsV11(context)
? TlsUtilities.PRF_legacy(master_secret, ExporterLabel.key_expansion, seed, size)
: TlsUtilities.PRF(context, master_secret, ExporterLabel.key_expansion, seed, size));
}