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  1. #1
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    Dec 2015
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    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:
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  2. #2
    2kaud's Avatar
    2kaud is offline Super Moderator Power Poster
    Join Date
    Dec 2012
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    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++23 Compiler: Microsoft VS2022 (17.6.5)

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