dcsimg
CodeGuru Home VC++ / MFC / C++ .NET / C# Visual Basic VB Forums Developer.com
Results 1 to 2 of 2

Thread: XOR encryption using CString

  1. #1
    Join Date
    Dec 2015
    Posts
    1

    XOR encryption using CString

    ive been trying to figure out how to do a basic XOR encryption with CStrings but i have errors
    im having trouble with the for loop character counter. the code i have to count the number of characters in the CString returns an error from a header file atlsimpstr.h
    my code function and error window are as follows:
    Name:  Capture.PNG
Views: 1247
Size:  14.6 KBName:  Capture1.PNG
Views: 411
Size:  26.6 KB

  2. #2
    2kaud's Avatar
    2kaud is online now Super Moderator Power Poster
    Join Date
    Dec 2012
    Location
    England
    Posts
    6,872

    Re: XOR encryption using CString

    Where is the bound of the m_output string set and to what value?

    How do you know that m_display has at least m_masterkey.GetLength() chars?

    Consider
    Code:
    m_output = "";
    for (int i = 0; i < m_masterkey.GetLength() && i < m_display.GetLength(); i++)
         m_output += m_display.GetAt(i) ^ m_masterkey.GetAt(i);
    All advice is offered in good faith only. All my code is tested (unless stated explicitly otherwise) with the latest version of Microsoft Visual Studio (using the supported features of the latest standard) and is offered as examples only - not as production quality. I cannot offer advice regarding any other c/c++ compiler/IDE or incompatibilities with VS. You are ultimately responsible for the effects of your programs and the integrity of the machines they run on. Anything I post, code snippets, advice, etc is licensed as Public Domain https://creativecommons.org/publicdomain/zero/1.0/ and can be used without reference or acknowledgement. Also note that I only provide advice and guidance via the forums - and not via private messages!

    C++17 Compiler: Microsoft VS2019 (16.3.4)

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  


Windows Mobile Development Center


Click Here to Expand Forum to Full Width




On-Demand Webinars (sponsored)