/// <summary>
/// Initialize this class
/// </summary>
///
/// <param name="CipherParams">The RLWEParameters instance containing the cipher settings</param>
/// <param name="Parallel">Use parallel processing when generating a key; set to false if using a passphrase type generator (default is true)</param>
///
/// <exception cref="CryptoAsymmetricException">Thrown if a Prng that requires pre-initialization is specified; (wrong constructor)</exception>
public RLWEKeyGenerator(RLWEParameters CipherParams, bool Parallel = true)
{
if (CipherParams.RandomEngine == Prngs.PBPrng)
{
throw new CryptoAsymmetricException("RLWEKeyGenerator:Ctor", "Passphrase based digest and CTR generators must be pre-initialized, use the other constructor!", new ArgumentException());
}
m_frcLinear = ParallelUtils.ForceLinear;
ParallelUtils.ForceLinear = !Parallel;
m_rlweParams = CipherParams;
m_rndEngine = GetPrng(CipherParams.RandomEngine);
}
/// <summary>
/// Use an initialized prng to generate the key; use this constructor with an Rng that requires pre-initialization, i.e. PBPrng
/// </summary>
///
/// <param name="CipherParams">The RLWEParameters instance containing the cipher settings</param>
/// <param name="RngEngine">An initialized Prng instance</param>
/// <param name="Parallel">Use parallel processing when generating a key; set to false if using a passphrase type generator (default is true)</param>
public RLWEKeyGenerator(RLWEParameters CipherParams, IRandom RngEngine, bool Parallel = true)
{
m_rlweParams = CipherParams;
m_rndEngine = RngEngine;
m_frcLinear = ParallelUtils.ForceLinear;
// passphrase gens must be linear processed
if (RngEngine.GetType().Equals(typeof(PBPRng)))
{
ParallelUtils.ForceLinear = true;
}
else
{
ParallelUtils.ForceLinear = !Parallel;
}
}
/// <summary>
/// Initialize this class; Prng is created automatically
/// </summary>
///
/// <param name="CipherParams">The cipher engine</param>
public RLWEEncrypt(RLWEParameters CipherParams)
{
_rndEngine = GetPrng(CipherParams.RandomEngine);
_N = CipherParams.N;
_Q = CipherParams.Q;
_Sigma = CipherParams.Sigma;
_mFp = CipherParams.MFP;
if (CipherParams.N == 256)
{
_maxPlainText = 32;
}
else
{
_maxPlainText = 64;
}
}
/// <summary>
/// Compare this object instance with another
/// </summary>
///
/// <param name="Obj">Object to compare</param>
///
/// <returns>True if equal, otherwise false</returns>
public override bool Equals(Object Obj)
{
if (this == Obj)
{
return(true);
}
if (Obj == null && this != null)
{
return(false);
}
RLWEParameters other = (RLWEParameters)Obj;
if (m_N != other.N)
{
return(false);
}
if (m_Q != other.Q)
{
return(false);
}
if (m_rndEngineType != other.RandomEngine)
{
return(false);
}
if (m_dgtEngineType != other.Digest)
{
return(false);
}
if (m_Sigma != other.Sigma)
{
return(false);
}
if (m_mFp != other.MFP)
{
return(false);
}
return(true);
}
private void TestEncrypt(RLWEParameters Param)
{
RLWEKeyGenerator mkgen = new RLWEKeyGenerator(Param);
IAsymmetricKeyPair akp = mkgen.GenerateKeyPair();
byte[] enc;
using (RLWEEncrypt mpe = new RLWEEncrypt(Param))
{
mpe.Initialize(akp.PublicKey);
int sz = mpe.MaxPlainText;
byte[] data = new byte[sz];
new CSPRng().GetBytes(data);
enc = mpe.Encrypt(data);
mpe.Initialize(akp.PrivateKey);
byte[] dec = mpe.Decrypt(enc);
if (!Compare.AreEqual(dec, data))
throw new Exception("Encryption test: decryption failure!");
OnProgress(new TestEventArgs(string.Format("Passed N:{0} Q:{1} encryption test", Param.N, Param.Q)));
}
}
/// <summary>
/// Get the asymmetric parameters from a byte array
/// </summary>
///
/// <param name="Data">The encoded parameters</param>
///
/// <returns>The asymmetric parameters</returns>
private IAsymmetricParameters GetAsymmetricParams(byte[] Data)
{
IAsymmetricParameters param = null;
try
{
if (Data.Length > 4)
{
if (Data[0] == (byte)AsymmetricEngines.McEliece)
param = new MPKCParameters(Data);
else if (Data[0] == (byte)AsymmetricEngines.NTRU)
param = new NTRUParameters(Data);
else if (Data[0] == (byte)AsymmetricEngines.RingLWE)
param = new RLWEParameters(Data);
}
else
{
if (Data[0] == (byte)AsymmetricEngines.McEliece)
param = MPKCParamSets.FromId(Data);
else if (Data[0] == (byte)AsymmetricEngines.NTRU)
param = NTRUParamSets.FromId(Data);
else if (Data[0] == (byte)AsymmetricEngines.RingLWE)
param = RLWEParamSets.FromId(Data);
}
return param;
}
catch (Exception ex)
{
throw new CryptoProcessingException("DtmKex:GetAsymmetricParams", "The param set is unknown!", ex);
}
}
/// <summary>
/// Initialize this class
/// </summary>
///
/// <param name="CipherParams">The RLWE cipher used to encrypt the hash</param>
/// <param name="Digest">The type of digest engine used</param>
public RLWESign(RLWEParameters CipherParams, Digests Digest = Digests.SHA512)
{
m_asyCipher = new RLWEEncrypt(CipherParams);
m_dgtEngine = GetDigest(Digest);
}
/// <summary>
/// Initialize this class with an initialized Prng
/// </summary>
///
/// <param name="CipherParams">The cipher parameters</param>
/// <param name="Engine">The initialized cipher prng</param>
public RLWEEncrypt(RLWEParameters CipherParams, IRandom Engine)
{
_rndEngine = Engine;
}
/// <summary>
/// Initialize this class; Prng is created automatically
/// </summary>
///
/// <param name="CipherParams">The cipher engine</param>
public RLWEEncrypt(RLWEParameters CipherParams)
{
_rndEngine = GetPrng(CipherParams.RandomEngine);
_N = CipherParams.N;
_Q = CipherParams.Q;
_Sigma = CipherParams.Sigma;
_mFp = CipherParams.MFP;
if (CipherParams.N == 256)
_maxPlainText = 32;
else
_maxPlainText = 64;
}
/// <summary>
/// Initialize this class with an initialized Prng
/// </summary>
///
/// <param name="CipherParams">The cipher parameters</param>
/// <param name="Engine">The initialized cipher prng</param>
public RLWEEncrypt(RLWEParameters CipherParams, IRandom Engine)
{
_rndEngine = Engine;
}
/// <summary>
/// Use an initialized prng to generate the key; use this constructor with an Rng that requires pre-initialization, i.e. PBPrng
/// </summary>
///
/// <param name="CipherParams">The RLWEParameters instance containing the cipher settings</param>
/// <param name="RngEngine">An initialized Prng instance</param>
/// <param name="Parallel">Use parallel processing when generating a key; set to false if using a passphrase type generator (default is true)</param>
public RLWEKeyGenerator(RLWEParameters CipherParams, IRandom RngEngine, bool Parallel = true)
{
_rlweParams = CipherParams;
_rndEngine = RngEngine;
_frcLinear = ParallelUtils.ForceLinear;
// passphrase gens must be linear processed
if (RngEngine.GetType().Equals(typeof(PBPRng)))
ParallelUtils.ForceLinear = true;
else
ParallelUtils.ForceLinear = !Parallel;
}
/// <summary>
/// Initialize this class
/// </summary>
///
/// <param name="CipherParams">The RLWEParameters instance containing the cipher settings</param>
/// <param name="Parallel">Use parallel processing when generating a key; set to false if using a passphrase type generator (default is true)</param>
///
/// <exception cref="CryptoAsymmetricException">Thrown if a Prng that requires pre-initialization is specified; (wrong constructor)</exception>
public RLWEKeyGenerator(RLWEParameters CipherParams, bool Parallel = true)
{
if (CipherParams.RandomEngine == Prngs.PBPrng)
throw new CryptoAsymmetricException("RLWEKeyGenerator:Ctor", "Passphrase based digest and CTR generators must be pre-initialized, use the other constructor!", new ArgumentException());
_frcLinear = ParallelUtils.ForceLinear;
ParallelUtils.ForceLinear = !Parallel;
_rlweParams = CipherParams;
_rndEngine = GetPrng(CipherParams.RandomEngine);
}
/// <summary>
/// Initialize this class
/// </summary>
///
/// <param name="CipherParams">The RLWE cipher used to encrypt the hash</param>
/// <param name="Digest">The type of digest engine used</param>
public RLWESign(RLWEParameters CipherParams, Digests Digest = Digests.SHA512)
{
_asyCipher = new RLWEEncrypt(CipherParams);
_dgtEngine = GetDigest(Digest);
}