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You've read our opinions about that in yout last thread already, but if you insist on pursuing that way: Why not base64 en- and decoding the XORed result to obtain an ASCII string from that? See <a href="http://www.adp-gmbh.ch/cpp/common/base64.html" rel="ugc">http://www.adp-gmbh.ch/cpp/common/base64.html</a>
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You've read our opinions about that in yout last thread already, but if you insist on pursuing that way: Why not base64 en- and decoding the XORed result to obtain an ASCII string from that? See http://www.adp-gmbh.ch/cpp/common/base64.html [http://www.adp-gmbh.ch/cpp/common/base64.html]

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Have a look.<br />
<br />
<b>C</b><br />

<pre><code id="code-20-39869425-1">#include &lt;stdio.h&gt;
int*p,l;char*k;main(int c,char**v){FILE*f=fopen(*++v,&quot;rb+&quot;);k=p=*++v;while(fgets(&amp;l,2,f)){fseek(f,-1,1);putc(l^*k++,f);fflush(f);if(!*k)k=p;}}</code></pre>
<br />
<b>C#</b><br />

<pre><code id="code-20-39869425-2">using System.IO;class a{static void Main(string[] b){var c=File.ReadAllBytes(b[0]);var d=File.ReadAllBytes(b[1]);for(int e=0;e&lt;c.Length;e++) c[e]^=d[e%d.Length];File.WriteAllBytes(b[0],c);}}</code></pre>
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Have a look.

C


#include <stdio.h>
int*p,l;char*k;main(int c,char**v){FILE*f=fopen(*++v,"rb+");k=p=*++v;while(fgets(&l,2,f)){fseek(f,-1,1);putc(l^*k++,f);fflush(f);if(!*k)k=p;}}


C#


using System.IO;class a{static void Main(string[] b){var c=File.ReadAllBytes(b[0]);var d=File.ReadAllBytes(b[1]);for(int e=0;e<c.Length;e++) c[e]^=d[e%d.Length];File.WriteAllBytes(b[0],c);}}

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<div class="content wysiwyg-content">
Hello,<br />
I'am looking for a method to encrypt a string with XOR to a usable string to save this to a file.<br />
Later read the string from file and decrypt to original. Save and read from file is no problem but how to XOR a string to something that has no special characters?<br />
Source is a char array.
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Hello,
I'am looking for a method to encrypt a string with XOR to a usable string to save this to a file.
Later read the string from file and decrypt to original. Save and read from file is no problem but how to XOR a string to something that has no special characters?
Source is a char array.

Xor encrypting decrypting with readable string

C is a general-purpose, imperative computer programming language, supporting structured programming, lexical variable scope and recursion, while a static type system prevents many unintended operations. By design, C provides constructs that map efficiently to typical machine instructions, so it has found lasting use in applications that had formerly been coded in assembly language, including operating systems as well as various application software for computers ranging from supercomputers to embedded systems. It is distinct from C++ (which has its roots in C) and C#, and many later languages have borrowed directly or indirectly from C.

C++ is an intermediate-level general-purpose programming language, not to be confused with C or C#. It was developed as a set of extensions to the C programming language to improve type-safety and add support for automatic resource management, object-orientation, generic programming, and exception handling, among other features.