I have a standalone location where need to decrypt/Encrypt file which has been coming in encrypted format and we need to decrypt it, using a custom tool developed in .Net using C#, below are the technical details of the tool:

1. Converting the cipher text to byte[] using FromBase64String.
2. Using AES class to decrypt.
3. Rfc2898DeriveBytes class is used with custom salt.
4. Assigning encryptor Key and IV from Rfc2898DeriveBytes object.
5. Writing the CryptoStream based on above key, salt and initialization vector.

Please help us to identify what is additional needed from our side.