private ExportKeyList GetDecryptedFileKeys(EncryptedExportKeyList export)
{
try
{
X509Certificate2 certificate = KeyManagerHelper.GetInternalCertificate();
using (RSACryptoServiceProvider provider = (RSACryptoServiceProvider)certificate.PrivateKey)
{
byte[] key = EncryptionHelper.RsaDecrypt(Convert.FromBase64String(export.Key), provider);
byte[] iv = EncryptionHelper.RsaDecrypt(Convert.FromBase64String(export.IV), provider);
byte[] exportKeysData = EncryptionHelper.AesDecrypt(Convert.FromBase64String(export.ProductKeys), key, iv);
return Constants.DefaultEncoding.GetString(exportKeysData).FromXml<ExportKeyList>();
}
}
catch (CryptographicException ex)
{
ExceptionHandler.HandleException(ex);
throw new DisException("Exception_GetprivateKeyError");
}
}
public static EncryptedExportKeyList EncryptExportFile(string productKeysXml)
{
X509Certificate2 certificate = GetInternalCertificate();
byte[] productKeysData = Constants.DefaultEncoding.GetBytes(productKeysXml);
byte[] key;
byte[] iv;
byte[] encryptedData = EncryptionHelper.AesEncrypt(productKeysData, out key, out iv);
using (RSACryptoServiceProvider provider = (RSACryptoServiceProvider)certificate.PublicKey.Key)
{
EncryptedExportKeyList export = new EncryptedExportKeyList()
{
Key = Convert.ToBase64String(EncryptionHelper.RsaEncrypt(key, provider)),
IV = Convert.ToBase64String(EncryptionHelper.RsaEncrypt(iv, provider)),
ProductKeys = Convert.ToBase64String(encryptedData)
};
return export;
}
}
