public void Init(IDerivationParameters param)
{
KdfCounterParameters kdfParams = param as KdfCounterParameters;
if (kdfParams == null)
{
throw new ArgumentException("Wrong type of arguments given");
}
// --- init mac based PRF ---
this.prf.Init(new KeyParameter(kdfParams.Ki));
// --- set arguments ---
this.fixedInputDataCtrPrefix = kdfParams.FixedInputDataCounterPrefix;
this.fixedInputData_afterCtr = kdfParams.FixedInputDataCounterSuffix;
int r = kdfParams.R;
this.ios = new byte[r / 8];
BigInteger maxSize = Two.Pow(r).Multiply(BigInteger.ValueOf(h));
this.maxSizeExcl = maxSize.CompareTo(IntegerMax) == 1 ?
Int32.MaxValue : maxSize.IntValue;
// --- set operational state ---
generatedBytes = 0;
}
private void ProcessVectors(string name, ArrayList vectors)
{
foreach (Vector vector in vectors)
{
IMac prf = CavpReader.CreatePrf(vector);
KdfCounterBytesGenerator gen = new KdfCounterBytesGenerator(prf);
int r = -1;
{
string rlen = vector.HeaderAsString("RLEN");
if (rlen == null)
{
Assert.Fail("No RLEN");
}
r = Int32.Parse(rlen.Split('_')[0]);
}
int count = vector.ValueAsInt("COUNT");
int l = vector.ValueAsInt("L");
byte[] ki = vector.ValueAsBytes("KI");
if (vector.HeaderAsString("CTRLOCATION") == "BEFORE_FIXED")
{
byte[] fixedInputData = vector.ValueAsBytes("FixedInputData");
KdfCounterParameters param = new KdfCounterParameters(ki, null, fixedInputData, r);
gen.Init(param);
}
else if (vector.HeaderAsString("CTRLOCATION") == "AFTER_FIXED")
{
byte[] fixedInputData = vector.ValueAsBytes("FixedInputData");
KdfCounterParameters param = new KdfCounterParameters(ki, fixedInputData, null, r);
gen.Init(param);
}
else if (vector.HeaderAsString("CTRLOCATION") == "MIDDLE_FIXED")
{
byte[] DataBeforeCtrData = vector.ValueAsBytes("DataBeforeCtrData");
byte[] DataAfterCtrData = vector.ValueAsBytes("DataAfterCtrData");
KdfCounterParameters param = new KdfCounterParameters(ki, DataBeforeCtrData, DataAfterCtrData, r);
gen.Init(param);
}
else
{
throw new InvalidOperationException("Unknown CTRLOCATION: " + vector.HeaderAsString("CTRLOCATION"));
}
byte[] koGenerated = new byte[l / 8];
gen.GenerateBytes(koGenerated, 0, koGenerated.Length);
byte[] koVectors = vector.ValueAsBytes("KO");
CompareKO(name, vector, count, koGenerated, koVectors);
}
}
