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crypt [message #469642] Sat, 23 June 2012 06:52 Go to next message
reborn is currently offline  reborn
Messages: 3231
Registered: September 2004
Location: uk - london
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General (3 Stars)
I am not familiar at all with string encryption and decryption.

I have the following function:

void encrypt (char e[] ) 
{
	for( int i=0; e[i] != '\0'; ++i )
	{
		++e[i];
	}
} 


void decrypt( char * ePtr ) 
{
	for( ; * ePtr != '\0'; ++ ePtr )
	{
		--(* ePtr);
	}
}


It's obviously completely pathetic.

Anyone care to improve this? Something that can boast of industry standard would be excellent.



[Updated on: Sat, 23 June 2012 09:19]

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Re: crypt [message #469644 is a reply to message #469642] Sat, 23 June 2012 07:10 Go to previous messageGo to next message
iRANian is currently offline  iRANian
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General (4 Stars)
What is it needed for? If you're releasing a binary people can just copy and paste the ASM for the encryption and decryption functions or hook them and have the output for them get logged to a console window.

Long time and well respected Renegade community member, programmer, modder and tester.

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Re: crypt [message #469649 is a reply to message #469642] Sat, 23 June 2012 08:09 Go to previous messageGo to next message
danpaul88 is currently offline  danpaul88
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Xor encryption is simple but effective. Google it Wink

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Re: crypt [message #469652 is a reply to message #469649] Sat, 23 June 2012 09:21 Go to previous messageGo to next message
reborn is currently offline  reborn
Messages: 3231
Registered: September 2004
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General (3 Stars)
iRANian wrote on Sat, 23 June 2012 10:10

What is it needed for? If you're releasing a binary people can just copy and paste the ASM for the encryption and decryption functions or hook them and have the output for them get logged to a console window.


It would be in a released binary, yes.
I am storing a user name and password to a settings file, and storing it as plain text isn't acceptable.


danpaul88 wrote on Sat, 23 June 2012 11:09

Xor encryption is simple but effective. Google it Wink


Thank you.



Re: crypt [message #469723 is a reply to message #469642] Sun, 24 June 2012 14:11 Go to previous messageGo to next message
Sir Kane
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General (1 Star)
Keep in mind that encrypting text will require you to save the result base64 or something else encoded, because encryption can result in 0 values.

Proud N9500 and proud N6270 user. Creator of the IEE libraries (original bhs.dll) and the RB series software.
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Re: crypt [message #470643 is a reply to message #469723] Tue, 03 July 2012 10:41 Go to previous message
Jerad2142 is currently offline  Jerad2142
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General (3 Stars)
If your just doing ascii encryption keep in mind that it's from 0 - 127. So if you exceed 127 you'll have to loop it down to 0. If you drop under 0 you have to loop it back around to 127. Otherwise when you save it you'll be left with nothing useful.

However, as danpaul88 said, Google is an excellent place to check out too, you can go and get any encryption algorithm off of there in open source pretty much (wiki usually has source with examples of the algorithms as well).


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