/// <summary>
/// Decrypts the target key with the CryptoManager's private RSA key. It is assumbed that the
/// @rijKey was previously encrypted with the CryptoManager's public key.
/// </summary>
/// <param name="rijKey"></param>
/// <returns></returns>
public byte[] DecryptRijndaelKey(byte[] rijKey)
{
byte[] key = new byte[0];
lock (this)
{
m_RSA = new RiaWebSoftRu.Cryptography.Crypto.RsaManaged();
m_RSA.FromXmlString(System.Text.UTF8Encoding.UTF8.GetString(m_PrivateKey));
m_RSA.Decrypt(rijKey, false);
}
return(key);
}
public UnityCryptoManager()
{
m_RSA_Exch_Formatter = new RiaWebSoftRu.Cryptography.Crypto.Formater.RSAESPKCSFormater();
m_RSA = new RiaWebSoftRu.Cryptography.Crypto.RsaManaged(m_KeySize);
m_SHA = new SHA256Managed();
m_RIJ = new AesManaged();
//m_RSA.GenerateKey(); Not necessary in unity. Unity clients gets a public key from server and uses that to encrypt the Rijndael key
m_SHA = new SHA256Managed();
m_RIJ.Padding = PaddingMode.PKCS7;
m_RIJ.Mode = CipherMode.CBC;
m_RIJ.IV = new byte[16];
m_RIJ.BlockSize = 128;
m_RIJ.KeySize = 256;
m_RIJ.GenerateKey();
m_PublicKey = Encoding.UTF8.GetBytes(m_RSA.ToXmlString(false).ToString());
m_PrivateKey = Encoding.UTF8.GetBytes(m_RSA.ToXmlString(true).ToString());
}
public UnityCryptoManager()
{
m_RSA_Exch_Formatter = new RiaWebSoftRu.Cryptography.Crypto.Formater.RSAESPKCSFormater();
m_RSA = new RiaWebSoftRu.Cryptography.Crypto.RsaManaged(m_KeySize);
m_SHA = new SHA256Managed();
m_RIJ = new AesManaged();
//m_RSA.GenerateKey(); Not necessary in unity. Unity clients gets a public key from server and uses that to encrypt the Rijndael key
m_SHA = new SHA256Managed();
m_RIJ.Padding = PaddingMode.PKCS7;
m_RIJ.Mode = CipherMode.CBC;
m_RIJ.IV = new byte[16];
m_RIJ.BlockSize = 128;
m_RIJ.KeySize = 256;
m_RIJ.GenerateKey();
m_PublicKey = Encoding.UTF8.GetBytes(m_RSA.ToXmlString(false).ToString());
m_PrivateKey = Encoding.UTF8.GetBytes(m_RSA.ToXmlString(true).ToString());
}
/// <summary>
/// Encrypts the target @rijKey with the given RSA public key. Generally, the public RSA key is
/// transmitted via plaintext and then used to encrypt the Rijndael key. The encrypted Rijndael key can then
/// only be decrypted by the holder of the private RSA key that was generated along with the public key.
/// This is the core of the encryption key exchange at the beginning of all Kronus network communication.
/// </summary>
/// <param name="publicKey">the public RSA key used to encrpt @rijKey</param>
/// <param name="rijKey">the Rijndael key to encrypt</param>
/// <returns></returns>
public byte[] EncryptRijndaelKey(byte[] publicKey, byte[] rijKey)
{
byte[] key = new byte[0];
lock (this)
{
m_RSA = new RiaWebSoftRu.Cryptography.Crypto.RsaManaged();
m_RSA.FromXmlString(System.Text.UTF8Encoding.UTF8.GetString(publicKey));
key = m_RSA.Encrypt(rijKey, false);
}
return key;
}