public byte[] Encrypt(byte[] M, List <int> S)
{
RSAParameters SK, VK;
Cryptotext cryptotext = new Cryptotext();
List <byte[]> cry = new List <byte[]>();
using (var RSA = new RSACryptoServiceProvider())
{
VK = RSA.ExportParameters(false);
SK = RSA.ExportParameters(true);
}
for (int i = 1; i < S.Count; i++)
{
BinaryFormatter bf = new BinaryFormatter();
using (MemoryStream ms = new MemoryStream())
{
bf.Serialize(ms, new TextPerUser(M, VK));
using (var RSA = new RSACryptoServiceProvider())
{
RSA.ImportParameters(MPK[i]);
cry[i] = RSA.Encrypt(ms.ToArray(), false);
}
}
}
cryptotext.VK = VK;
cryptotext.Ci = cry;
using (var RSA = new RSACryptoServiceProvider())
{
BinaryFormatter bf = new BinaryFormatter();
using (MemoryStream ms = new MemoryStream())
{
RSA.ImportParameters(SK);
bf.Serialize(ms, cry);
cryptotext.signedData = RSA.SignData(ms.ToArray(), new SHA1CryptoServiceProvider());
}
}
byte[] rezult = null;
BinaryFormatter bf1 = new BinaryFormatter();
using (MemoryStream ms = new MemoryStream())
{
bf1.Serialize(ms, cryptotext);
rezult = ms.ToArray();
}
return(rezult);
}
public byte[] Decrypt(byte[] C, RSAParameters ski)
{
byte[] rezult = null;
BinaryFormatter formatter = new BinaryFormatter();
MemoryStream ms = new MemoryStream(C);
Cryptotext deserializedCryptotext = (Cryptotext)formatter.Deserialize(ms);
for (int i = 0; i < deserializedCryptotext.Ci.Count; i++)
{
using (var RSA = new RSACryptoServiceProvider())
{
RSA.ImportParameters(ski);
byte[] M = RSA.Decrypt(deserializedCryptotext.Ci[i], false);
}
}
return(rezult);
}