/// <summary>
/// The McEliece encryption primitive
/// </summary>
///
/// <param name="PublicKey">The public key</param>
/// <param name="M">The message vector</param>
/// <param name="Z">The error vector</param>
///
/// <returns><c>m*G + z</c></returns>
public static GF2Vector Encrypt(MPKCPublicKey PublicKey, GF2Vector M, GF2Vector Z)
{
GF2Matrix matrixG = PublicKey.G;
Vector mG = matrixG.LeftMultiplyLeftCompactForm(M);
return((GF2Vector)mG.Add(Z));
}
/// <summary>
/// The McEliece encryption primitive
/// </summary>
///
/// <param name="PublicKey">The public key</param>
/// <param name="M">The message vector</param>
/// <param name="Z">The error vector</param>
///
/// <returns><c>m*G + z</c></returns>
public static GF2Vector Encrypt(MPKCPublicKey PublicKey, GF2Vector M, GF2Vector Z)
{
GF2Matrix matrixG = PublicKey.G;
Vector mG = matrixG.LeftMultiplyLeftCompactForm(M);
return (GF2Vector)mG.Add(Z);
}
private void TestEncode()
{
MPKCParameters mpar = (MPKCParameters)MPKCParamSets.MPKCFM11T40S256.DeepCopy();
MPKCKeyGenerator mkgen = new MPKCKeyGenerator(mpar);
IAsymmetricKeyPair akp = mkgen.GenerateKeyPair();
MPKCPublicKey pub = (MPKCPublicKey)akp.PublicKey;
byte[] enc = pub.ToBytes();
using (MPKCPublicKey pub2 = MPKCPublicKey.From(enc))
{
if (!pub.Equals(pub2))
{
throw new Exception("EncryptionKey: public key comparison test failed!");
}
if (pub.GetHashCode() != pub2.GetHashCode())
{
throw new Exception("EncryptionKey: public key hash test failed!");
}
}
OnProgress(new TestEventArgs("Passed public key serialization"));
MemoryStream pubstr = pub.ToStream();
using (MPKCPublicKey pub2 = MPKCPublicKey.From(pubstr))
{
if (!pub.Equals(pub2))
{
throw new Exception("EncryptionKey: public key comparison test failed!");
}
if (pub.GetHashCode() != pub2.GetHashCode())
{
throw new Exception("EncryptionKey: public key hash test failed!");
}
}
pubstr.Dispose();
OnProgress(new TestEventArgs("Passed public key stream test"));
MPKCPrivateKey pri = (MPKCPrivateKey)akp.PrivateKey;
enc = pri.ToBytes();
using (MPKCPrivateKey pri2 = new MPKCPrivateKey(enc))
{
if (!pri.Equals(pri2))
{
throw new Exception("EncryptionKey: private key comparison test failed!");
}
if (pri.GetHashCode() != pri2.GetHashCode())
{
throw new Exception("EncryptionKey: private key hash test failed!");
}
}
OnProgress(new TestEventArgs("Passed private key serialization"));
MemoryStream pristr = pri.ToStream();
using (MPKCPrivateKey pri2 = MPKCPrivateKey.From(pristr))
{
if (!pri.Equals(pri2))
{
throw new Exception("EncryptionKey: private key comparison test failed!");
}
if (pri.GetHashCode() != pri2.GetHashCode())
{
throw new Exception("EncryptionKey: private key hash test failed!");
}
}
pristr.Dispose();
OnProgress(new TestEventArgs("Passed private key stream test"));
using (MPKCEncrypt mpe = new MPKCEncrypt(mpar))
{
mpe.Initialize(akp.PublicKey);
int sz = mpe.MaxPlainText - 1;
byte[] data = new byte[sz];
new VTDev.Libraries.CEXEngine.Crypto.Prng.CSPPrng().GetBytes(data);
enc = mpe.Encrypt(data);
mpe.Initialize(akp.PrivateKey);
byte[] dec = mpe.Decrypt(enc);
if (!Evaluate.AreEqual(dec, data))
{
throw new Exception("EncryptionKey: decryption failure!");
}
OnProgress(new TestEventArgs("Passed encryption test"));
}
pri.Dispose();
pub.Dispose();
}
