private void SetKdfParameters(KdfParameters p)
{
if (p == null)
{
Debug.Assert(false); return;
}
KdfEngine kdf = KdfPool.Get(p.KdfUuid);
if (kdf == null)
{
Debug.Assert(false); return;
}
for (int i = 0; i < m_cmbKdf.Items.Count; ++i)
{
string strKdf = (m_cmbKdf.Items[i] as string);
if (string.IsNullOrEmpty(strKdf))
{
Debug.Assert(false); continue;
}
if (strKdf.Equals(kdf.Name, StrUtil.CaseIgnoreCmp))
{
bool bPrevInit = m_bInitializing;
m_bInitializing = true; // Prevent selection handler
m_cmbKdf.SelectedIndex = i;
m_bInitializing = bPrevInit;
break;
}
}
if (kdf is AesKdf)
{
ulong uIt = p.GetUInt64(AesKdf.ParamRounds,
PwDefs.DefaultKeyEncryptionRounds);
SetKdfParameters(uIt, 1024, 2);
}
else if (kdf is Argon2Kdf)
{
ulong uIt = p.GetUInt64(Argon2Kdf.ParamIterations,
Argon2Kdf.DefaultIterations);
ulong uMem = p.GetUInt64(Argon2Kdf.ParamMemory,
Argon2Kdf.DefaultMemory);
uint uPar = p.GetUInt32(Argon2Kdf.ParamParallelism,
Argon2Kdf.DefaultParallelism);
SetKdfParameters(uIt, uMem, uPar);
}
// else { Debug.Assert(false); } // Plugins may provide other KDFs
}
public override byte[] Transform(byte[] pbMsg, KdfParameters p)
{
if(pbMsg == null) throw new ArgumentNullException("pbMsg");
if(p == null) throw new ArgumentNullException("p");
Type tRounds = p.GetTypeOf(ParamRounds);
if(tRounds == null) throw new ArgumentNullException("p.Rounds");
if(tRounds != typeof(ulong)) throw new ArgumentOutOfRangeException("p.Rounds");
ulong uRounds = p.GetUInt64(ParamRounds, 0);
byte[] pbSeed = p.GetByteArray(ParamSeed);
if(pbSeed == null) throw new ArgumentNullException("p.Seed");
if(pbMsg.Length != 32)
{
Debug.Assert(false);
pbMsg = CryptoUtil.HashSha256(pbMsg);
}
if(pbSeed.Length != 32)
{
Debug.Assert(false);
pbSeed = CryptoUtil.HashSha256(pbSeed);
}
return TransformKey(pbMsg, pbSeed, uRounds);
}
private static void CheckKdf(KdfParameters param, TestKdfValues testEntryValues)
{
Assert.AreEqual(testEntryValues.KdfUuid, param.KdfUuid);
if (param.KdfUuid.Equals(TestKdfValues.UuidAes))
{
Assert.AreEqual(testEntryValues.AesKeyTransformationRounds, param.GetUInt64(AesKdf.ParamRounds, 0));
}
else if (param.KdfUuid.Equals(TestKdfValues.UuidArgon2))
{
Assert.AreEqual(testEntryValues.Argon2Iterations, param.GetUInt64(Argon2Kdf.ParamIterations, 0));
Assert.AreEqual(testEntryValues.Argon2Memory, param.GetUInt64(Argon2Kdf.ParamMemory, 0));
Assert.AreEqual(testEntryValues.Argon2Parallelism, param.GetUInt32(Argon2Kdf.ParamParallelism, 0));
}
else
{
Assert.Fail("Kdf is not Aes or Argon2");
}
}
