public KdfResult Kdf(KdfParameterTls10_11 param, BitString fixedInfo = null)
{
var result = _kdfVisitor.Kdf(param, fixedInfo);
var dkmBytesLen = result.DerivedKey.BitLength.CeilingDivide(BitString.BITSINBYTE);
// Modify a random byte within DKM
result.DerivedKey[_random.GetRandomInt(0, dkmBytesLen)] += 2;
return(result);
}
public KdfResult Kdf(KdfParameterTls10_11 param, BitString fixedInfo = null)
{
var zBytesLen = param.Z.BitLength.CeilingDivide(BitString.BITSINBYTE);
var modifiedParam = new KdfParameterTls10_11()
{
L = param.L,
Z = param.Z.GetDeepCopy()
};
// Modify a random byte within Z
modifiedParam.Z[_random.GetRandomInt(0, zBytesLen)] += 2;
return(_kdfVisitor.Kdf(modifiedParam, fixedInfo));
}
public KdfResult Kdf(KdfParameterTls10_11 param, BitString fixedInfo = null)
{
var hashFunction = ShaAttributes.GetHashFunctionFromEnum(param.HashFunction);
var kdf = _tlsFactory.GetTlsKdfInstance(TlsModes.v10v11, hashFunction);
var result = kdf.DeriveKey(
param.Z,
param.InitiatorEphemeralData,
param.ResponderEphemeralData,
param.AdditionalInitiatorNonce,
param.AdditionalResponderNonce,
param.L);
return(new KdfResult(result.DerivedKey));
}
