Strong (AES) encryption (in C++) for any file (.txt .docx. .exe .whatever)

Question

1.00/5 (1 vote)

See more:

I need a way to encrypt and Decrypt a file of any extention with AES in C++.

The Requirements for my Project:

Encryption with AES256
Creating the AES Key from a Password the user enters

I am not very good at C++ becouse i have just previously started learning it.

It would be great if someone could help me here.

What I have tried:

I searched the Internet for 2 Hours now and i cant figure it out

Posted 25-Jun-21 21:11pm

Marcel Waschnig

Updated 25-Jun-21 21:28pm

Add a Solution

2 solutions

Solution 1

Any DES encryption code will handle data "of any extension" as all files are binary data, and a stream or array of binary data is all you need to load in order to encrypt it.

Text files are binary files that contain a "limited subset" of the binary byte phase space, or which apply a "layer" of interpretation to the binary data (for example UTF8 uses a multibyte encoding to get 16 bit data into 8 bit bytes).

So any code you use that encrypts and decrypts any file should work for every file.
Start with the official documentation for the environment your code will work in - a C++ CLI solution will use the .NET framework, while an MFC solution would be different - the relevant Microsoft help page will provide basic code samples which should work.

Posted 25-Jun-21 21:23pm

OriginalGriff

Comments

Marcel Waschnig 26-Jun-21 3:27am

This is Good but i still dont know how to encrypt the file with AES

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard MacCutchan · Accepted Answer · 2021-06-25T21:28:00

Solution 2

See Cryptography API: Next Generation - Win32 apps | Microsoft Docs[^]. Encryption does not care what data it works on, so you can do it by treating all files as streams of bytes.

Posted 25-Jun-21 21:28pm

Richard MacCutchan

Comments

Marcel Waschnig 26-Jun-21 3:30am

This is a very good answer thx.

Richard MacCutchan 26-Jun-21 3:42am

Thanks. I have used this myself in a small scale application and it works well.