/// <summary>
/// Packs to bytes.
/// </summary>
/// <param name="requestMessage">The request message.</param>
/// <param name="rsaPublicKey">The RSA public key.</param>
/// <param name="aesProvider">The aes provider.</param>
/// <returns></returns>
public static byte[] PackToBytes(this VirtualSecuredRequestRawMessage requestMessage, CryptoKey rsaPublicKey, RijndaelProvider aesProvider)
{
// Byte[] composition: [Schema Version]{1}[UTC Stamp]{4}[Encrypted Security Key Length Indication]{2+2}[Encrypted Security Key]{M+N}[Encrypted Body]{L}.
try
{
rsaPublicKey.CheckNullObject(nameof(rsaPublicKey));
aesProvider.CheckNullObject(nameof(aesProvider));
requestMessage.CheckNullObject(nameof(requestMessage));
requestMessage.SymmetricPrimaryKey.CheckNullObject(nameof(requestMessage.SymmetricPrimaryKey));
requestMessage.Stamp.CheckNullObject(nameof(requestMessage.Stamp));
List <byte> result = new List <byte>(_packInitialCapacity)
{
// index1: version.
Convert.ToByte(requestMessage.SchemaVersion)
};
// index2: Stamp.
result.AddRange(GetStampBytes(requestMessage.Stamp ?? DateTime.UtcNow));
// index3: Encrypted Security Key Length Indication.
var encryptedSymmetricPrimaryKey = EncodingOrSecurityExtension.RsaEncrypt(requestMessage.SymmetricPrimaryKey, rsaPublicKey);
var encryptedSymmetricSecondaryKey = (requestMessage.SymmetricSecondaryKey.ByteValue == null) ? null : EncodingOrSecurityExtension.RsaEncrypt(requestMessage.SymmetricSecondaryKey, rsaPublicKey);
result.AddRange(BitConverter.GetBytes((UInt16)encryptedSymmetricPrimaryKey.Length));
result.AddRange(BitConverter.GetBytes((UInt16)encryptedSymmetricSecondaryKey.Length));
// index4: Encrypted Security Key
result.AddRange(encryptedSymmetricPrimaryKey);
if (encryptedSymmetricSecondaryKey.HasItem())
{
result.AddRange(encryptedSymmetricSecondaryKey);
}
// index5: Encrypted content
result.AddRange(aesProvider.EncryptAes(requestMessage.Data));
return(result.ToArray());
}
catch (Exception ex)
{
throw ex.Handle();
}
}