[lp_crypt_xor]

Description

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

Requires [lp_array_roundrobin] [lp_string_asc] [lp_string_chr]

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);

'
';
'Encrypted = ' $encrypted_text '\r\n';
'Decrypted = ' $decrypted_text '\r\n';
'
';

Source Code

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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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