public async Task <Stream> DecryptFile(byte[] content, string fileExtension)
{
if (fileExtension == FileConstants.AesExtension)
{
var aesKey = await _context.AesKeys.FirstOrDefaultAsync();
var decryptedFileContent = SymmetricCrypto.DecryptDataToStream(content, aesKey.Key, aesKey.IV, CryptoAlgorithm.Aes);
return(decryptedFileContent);
}
else
{
RijndaelManaged myRijndael = new RijndaelManaged();
var rijndaeData = await _context.RijndaelKeys.FirstOrDefaultAsync();
myRijndael.Key = Convert.FromBase64String(rijndaeData.Key);
myRijndael.IV = Convert.FromBase64String(rijndaeData.IV);
var decryptedFileContent = SymmetricCrypto.DecryptDataToStream(content, myRijndael.Key, myRijndael.IV);
return(decryptedFileContent);
}
}
