[lp_crypt_xor] at tagSwap.net: Open Source Lasso Code

[lp_crypt_xor]

Description

Link: [lp_crypt_xor]

Author: Bil Corry

Category: Encryption

Version: 8.x

License: Public Domain

Posted: Apr. 21, 2006

Updated: Jan. 01, 0001

More by this author...

Returns xor-encrypted/decrypted string given a string and password.

Requires [lp_array_roundrobin] [lp_string_asc] [lp_string_chr]

Parameters

-string	string, required	The string to encrypt/decrypt.
-password	string, required	The password to encrypt/decrypt.

Sample Usage

var:'text' = 'This is my message I want to encrypt.';
var:'password' = 'secret';
var:'encrypted_text' = (lp_crypt_xor: $text,$password);
var:'decrypted_text' = (lp_crypt_xor: $encrypted_text,$password);

'<pre>';
'Encrypted = ' $encrypted_text '\r\n';
'Decrypted = ' $decrypted_text '\r\n';
'</pre>';

Source Code

Click the "Download" button below to retrieve a copy of this tag, including the complete documentation and sample usage shown on this page. Place the downloaded ".inc" file in your LassoStartup folder, restart Lasso, and you can begin using this tag immediately.

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[

define_tag: 'lp_crypt_xor',
	-description='Returns xor-encrypted/decrypted string given a string and password.',
	-priority='replace',
	-required='string',
	-required='password';

	// init output
	local:'out' = string;

	// convert password for xor'ing
	local:'password_rr' = lp_array_roundrobin;
	iterate: (string: #password), local:'char';
		#password_rr->(insert: (lp_string_asc:#char));
	/iterate;
	
	// xor password against string
	local:'loop' = integer;
	local:'xor' = integer;
	iterate: (string: #string), local:'char';
		#xor = lp_string_asc:#char;
		#xor->(bitxor: #password_rr);
		#out += (lp_string_chr:#xor);
	/iterate;

	// return bytes
	return: #out;

/define_tag;

]

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