public KdfResult Kdf(KdfParameterIkeV1 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(KdfParameterIkeV1 param, BitString fixedInfo = null)
{
var hashFunction = ShaAttributes.GetHashFunctionFromEnum(param.HashFunction);
var kdf = _ikeV1Factory.GetIkeV1Instance(AuthenticationMethods.Dsa, hashFunction);
var result = kdf.GenerateIke(param.InitiatorEphemeralData, param.ResponderEphemeralData, param.Z,
param.AdditionalInitiatorNonce, param.AdditionalResponderNonce, null);
var dkm = new BitString(0)
.ConcatenateBits(result.SKeyIdD)
.ConcatenateBits(result.SKeyIdA)
.ConcatenateBits(result.SKeyIdE);
return(new KdfResult(dkm.GetMostSignificantBits(param.L)));
}
public KdfResult Kdf(KdfParameterHkdf param, BitString fixedInfo)
{
var zBytesLen = param.Z.BitLength.CeilingDivide(BitString.BITSINBYTE);
var modifiedParam = new KdfParameterIkeV1()
{
L = param.L,
Z = param.Z.GetDeepCopy(),
HashFunction = param.HmacAlg
};
// Modify a random byte within Z
modifiedParam.Z[_random.GetRandomInt(0, zBytesLen)] += 2;
return(_kdfVisitor.Kdf(modifiedParam, fixedInfo));
}
