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133 lines
3.7 KiB
JavaScript
133 lines
3.7 KiB
JavaScript
function str_rot13 (str) {
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// http://kevin.vanzonneveld.net
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// + original by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
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// + improved by: Ates Goral (http://magnetiq.com)
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// + bugfixed by: Onno Marsman
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// + improved by: Rafa? Kukawski (http://blog.kukawski.pl)
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// * example 1: str_rot13('Kevin van Zonneveld');
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// * returns 1: 'Xriva ina Mbaariryq'
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// * example 2: str_rot13('Xriva ina Mbaariryq');
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// * returns 2: 'Kevin van Zonneveld'
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// * example 3: str_rot13(33);
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// * returns 3: '33'
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return (str + '').replace(/[a-z]/gi, function (s) {
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return String.fromCharCode(s.charCodeAt(0) + (s.toLowerCase() < 'n' ? 13 : -13));
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});
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}
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// Arrays for pluggable encryptors/decryptors
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var red_encryptors = new Array();
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var red_decryptors = new Array();
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function hz_encrypt(alg, elem) {
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var enc_text = '';
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var newdiv = '';
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if(typeof tinyMCE !== "undefined")
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tinyMCE.triggerSave(false,true);
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var text = $(elem).val();
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// key and hint need to be localised
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var passphrase = prompt(aStr['passphrase']);
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// let the user cancel this dialogue
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if (passphrase == null)
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return false;
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var enc_key = bin2hex(passphrase);
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// If you don't provide a key you get rot13, which doesn't need a key
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// but consequently isn't secure.
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if(! enc_key)
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alg = 'rot13';
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if((alg == 'rot13') || (alg == 'triple-rot13'))
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newdiv = "[crypt alg='rot13']" + window.btoa(str_rot13(text)) + '[/crypt]';
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if(alg == 'AES-128-CCM') {
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// This is the prompt we're going to use when the receiver tries to open it.
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// Maybe "Grandma's maiden name" or "our secret place" or something.
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var enc_hint = bin2hex(prompt(aStr['passhint']));
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enc_text = sjcl.encrypt(enc_key, text);
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encrypted = enc_text.toString();
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newdiv = "[crypt alg='AES-128-CCM' hint='" + enc_hint + "']" + window.btoa(encrypted) + '[/crypt]';
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}
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if((red_encryptors.length) && (! newdiv.length)) {
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for(var i = 0; i < red_encryptors.length; i ++) {
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newdiv = red_encryptors[i](alg,text);
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if(newdiv.length)
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break;
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}
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}
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enc_key = '';
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// This might be a comment box on a page with a tinymce editor
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// so check if there is a tinymce editor but also check the display
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// property of our source element - because a tinymce instance
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// will have display "none". If a normal textarea such as in a comment
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// box has display "none" you wouldn't be able to type in it.
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if($(elem).css('display') == 'none' && typeof tinyMCE !== "undefined") {
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tinyMCE.activeEditor.setContent(newdiv);
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}
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else {
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$(elem).val(newdiv);
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}
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}
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function hz_decrypt(alg, hint, text, elem) {
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var dec_text = '';
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text = window.atob(text);
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if(alg == 'rot13' || alg == 'triple-rot13')
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dec_text = str_rot13(text);
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else {
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var enc_key = bin2hex(prompt((hint.length) ? hex2bin(hint) : aStr['passphrase']));
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}
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if(alg == 'AES-128-CCM') {
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dec_text = sjcl.decrypt(enc_key, text);
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}
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if((red_decryptors.length) && (! dec_text.length)) {
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for(var i = 0; i < red_decryptors.length; i ++) {
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dec_text = red_decryptors[i](alg,text,enc_key);
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if(dec_text.length)
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break;
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}
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}
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enc_key = '';
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// Not sure whether to drop this back in the conversation display.
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// It probably needs a lightbox or popup window because any conversation
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// updates could
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// wipe out the text and make you re-enter the key if it was in the
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// conversation. For now we do that so you can read it.
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var dec_result = dec_text.toString();
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delete dec_text;
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// incorrect decryptions *usually* but don't always have zero length
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// If the person typo'd let them try again without reloading the page
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// otherwise they'll have no "padlock" to click to try again.
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if(dec_result.length) {
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$(elem).html(b2h(dec_result));
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dec_result = '';
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}
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}
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