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+---- Thread: [C#] [C#][SRC]ROT13 Class (/showthread.php?tid=967896)
[C#][SRC]ROT13 Class - Ethereal - Jan 11, 2011
This is my own ROT13 class. It is fast - it did 10,000 characters instantly(1/5 of a second) and I am pretty proud of it.
Some constructive criticism is Ok, but don't flame.
Code
class ROT13
{
/// <summary>
/// This is an implementation of the ROT13(Rotation of 13, a.k.a Caesar Shift) algorithm, coded by Ethereal of HackForums.net.
/// This will scramble your string into an unreadable form.
/// </summary>
public string AlterText(string input)
{
char[] text = input.ToCharArray();
for (int i = 0; i < input.Length; i++)
{
int value = (int)text[i];
if (value >= 'a' && value <= 'm' || value >= 'A' && value <= 'M')
{
value += 13;
}
else if (value >= 'm' && value <= 'z' || value >= 'M' && value <= 'Z')
{
value -= 13;
}
text[i] = Convert.ToChar(value);
}
string FinVal = new string(text);
return FinVal;
}
}I hope that it is useful to you.
Update* Vigenere and ROT_X class to come soon. One more bug fix for Vigenere.
* - Blue Screen of Death - Jan 11, 2011
why don't you make a ROT-X class? not just a ROT-13 ...
Anyway i like it.
Thanks
* - haphap - Jan 11, 2011
you don't have to get the int value of the char... you just do char > 'a' etc it auto converts
* - Ethereal - Jan 11, 2011
(Jan 11, 2011 10:33 AM)bomblader Wrote: why don't you make a ROT-X class? not just a ROT-13 ...
Anyway i like it.
Thanks
I will be updating it to such a class. I was trying to keep it simple for my first implementation.
(Jan 11, 2011 10:35 AM)haphap Wrote: you don't have to get the int value of the char... you just do char > 'a' etc it auto converts
Thank you for that. This is the kind of info that I am looking for!
* - BravoTwoZero - Jan 11, 2011
Very nice... will try and test it but first I need to learn C# [:(]
* - Ethereal - Jan 11, 2011
(Jan 11, 2011 11:43 AM).Warlock. Wrote: Very nice... will try and test it but first I need to learn C# [:(]
I would definetly recommend it.
I may translate this to VB, when I finish a ROT - X class.
* - BravoTwoZero - Jan 11, 2011
(Jan 11, 2011 01:23 PM)Ethereal Wrote: I would definetly recommend it.Ok thankyou , looking forward to next three months which I havw the GSCE's coming up then will start learning C sharp... Thank god!!
I may translate this to VB, when I finish a ROT - X class.
* - Mr. Anderson - Jan 11, 2011
Ha nice! Glad people are starting to port encryption to .net.
* - AssChin79 - Jan 14, 2011
Nice Caeser Cipher! How 'bout a Vigenere cipher next! That one's my favorite for obscuring symmetric keys!
* - Ethereal - Jan 15, 2011
(Jan 14, 2011 08:02 AM)AssChin79 Wrote: Nice Caeser Cipher! How 'bout a Vigenere cipher next! That one's my favorite for obscuring symmetric keys!
I've been working on one.
It's all working fine, no errors, except when I decrypt, it changes the encrypted 'z' into an 'a'.
Breakpoints time.
* - Zer0Fact0r - Jan 15, 2011
Look into this: http://msdn.microsoft.com/en-US/library/6373h346(v=VS.80).aspx
Also this is not a proper Caesar cipher. A Caesar cipher with a shift of 1 will translate a 'z' to a 'a'.
* - Ethereal - Jan 15, 2011
(Jan 15, 2011 07:38 AM)Zer0Fact0r Wrote: Look into this: http://msdn.microsoft.com/en-US/library/6373h346(v=VS.80).aspx
Also this is not a proper Caesar cipher. A Caesar cipher with a shift of 1 will translate a 'z' to a 'a'.
This is a Caesar Cipher of 13. Trust me, I know what I am talking about.
This is ROT13, not generic Caesar Cipher.
Also, I have since updated the class with the '||' operator, so I will update it soon.