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function str_rot13 (str) {
// http://kevin.vanzonneveld.net
// + original by: Jonas Raoni Soares Silva (http://www.jsfromhell.com)
// + improved by: Ates Goral (http://magnetiq.com)
// + bugfixed by: Onno Marsman
// + improved by: Rafa? Kukawski (http://blog.kukawski.pl)
// * example 1: str_rot13('Kevin van Zonneveld');
// * returns 1: 'Xriva ina Mbaariryq'
// * example 2: str_rot13('Xriva ina Mbaariryq');
// * returns 2: 'Kevin van Zonneveld'
// * example 3: str_rot13(33);
// * returns 3: '33'
return (str + '').replace(/[a-z]/gi, function (s) {
return String.fromCharCode(s.charCodeAt(0) + (s.toLowerCase() < 'n' ? 13 : -13));
});
}
// We probably just want the element where the text is and find it ourself. e.g. if
// there is highlighted text use it, otherwise use the entire text.
// So the third element may be useless. Fix also in view/tpl/jot.tpl before
// adding to all the editor templates and enabling the feature
// Should probably do some input sanitising and dealing with bbcode, hiding key text, and displaying
// results in a lightbox and/or popup form are left as an exercise for the reader.
function red_encrypt(alg, elem,text) {
var enc_text = '';
var newdiv = '';
var text = $(elem).val();
// key and hint need to be localised
var enc_key = prompt(aStr['passphrase']);
// If you don't provide a key you get rot13, which doesn't need a key
// but consequently isn't secure.
if(! enc_key)
alg = 'rot13';
if((alg == 'rot13') || (alg == 'triple-rot13'))
newdiv = "[crypt alg='rot13']" + str_rot13(text) + '[/crypt]';
else if(alg == 'aes256') {
// This is the prompt we're going to use when the receiver tries to open it.
// Maybe "Grandma's maiden name" or "our secret place" or something.
var enc_hint = prompt(aStr['passhint']);
enc_text = CryptoJS.AES.encrypt(text,enc_key);
encrypted = enc_text.toString();
newdiv = "[crypt alg='aes256' hint='" + enc_hint + "']" + encrypted + '[/crypt]';
}
enc_key = '';
// alert(newdiv);
$(elem).val(newdiv);
// textarea = document.getElementById(elem);
// if (document.selection) {
// textarea.focus();
// selected = document.selection.createRange();
// selected.text = newdiv;
// } else if (textarea.selectionStart || textarea.selectionStart == "0") {
// var start = textarea.selectionStart;
// var end = textarea.selectionEnd;
// textarea.value = textarea.value.substring(0, start) + newdiv + textarea.value.substring(end, textarea.value.length);
// }
}
function red_decrypt(alg,hint,text,elem) {
var enc_text = '';
if(alg == 'rot13' || alg == 'triple-rot13')
enc_text = str_rot13(text);
if(alg == 'aes256') {
var enc_key = prompt((hint.length) ? hint : aStr['passphrase']);
enc_text = CryptoJS.AES.decrypt(text,enc_key);
}
enc_key = '';
// Not sure whether to drop this back in the conversation display.
// It probably needs a lightbox or popup window because any conversation
// updates could
// wipe out the text and make you re-enter the key if it was in the
// conversation. For now we do that so you can read it.
var enc_result = enc_text.toString(CryptoJS.enc.Utf8);
delete enc_text;
// incorrect decryptions *usually* but don't always have zero length
// If the person typo'd let them try again without reloading the page
// otherwise they'll have no "padlock" to click to try again.
if(enc_result.length) {
$(elem).html(b2h(enc_result));
enc_result = '';
}
}
function base64_encode (data) {
// http://kevin.vanzonneveld.net
// + original by: Tyler Akins (http://rumkin.com)
// + improved by: Bayron Guevara
// + improved by: Thunder.m
// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// + bugfixed by: Pellentesque Malesuada
// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// + improved by: Rafa? Kukawski (http://kukawski.pl)
// * example 1: base64_encode('Kevin van Zonneveld');
// * returns 1: 'S2V2aW4gdmFuIFpvbm5ldmVsZA=='
// mozilla has this native
// - but breaks in 2.0.0.12!
//if (typeof this.window['btoa'] === 'function') {
// return btoa(data);
//}
var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,
ac = 0,
enc = "",
tmp_arr = [];
if (!data) {
return data;
}
do { // pack three octets into four hexets
o1 = data.charCodeAt(i++);
o2 = data.charCodeAt(i++);
o3 = data.charCodeAt(i++);
bits = o1 << 16 | o2 << 8 | o3;
h1 = bits >> 18 & 0x3f;
h2 = bits >> 12 & 0x3f;
h3 = bits >> 6 & 0x3f;
h4 = bits & 0x3f;
// use hexets to index into b64, and append result to encoded string
tmp_arr[ac++] = b64.charAt(h1) + b64.charAt(h2) + b64.charAt(h3) + b64.charAt(h4);
} while (i < data.length);
enc = tmp_arr.join('');
var r = data.length % 3;
return (r ? enc.slice(0, r - 3) : enc) + '==='.slice(r || 3);
}
function base64_decode (data) {
// http://kevin.vanzonneveld.net
// + original by: Tyler Akins (http://rumkin.com)
// + improved by: Thunder.m
// + input by: Aman Gupta
// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// + bugfixed by: Onno Marsman
// + bugfixed by: Pellentesque Malesuada
// + improved by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// + input by: Brett Zamir (http://brett-zamir.me)
// + bugfixed by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
// * example 1: base64_decode('S2V2aW4gdmFuIFpvbm5ldmVsZA==');
// * returns 1: 'Kevin van Zonneveld'
// mozilla has this native
// - but breaks in 2.0.0.12!
//if (typeof this.window['atob'] === 'function') {
// return atob(data);
//}
var b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
var o1, o2, o3, h1, h2, h3, h4, bits, i = 0,
ac = 0,
dec = "",
tmp_arr = [];
if (!data) {
return data;
}
data += '';
do { // unpack four hexets into three octets using index points in b64
h1 = b64.indexOf(data.charAt(i++));
h2 = b64.indexOf(data.charAt(i++));
h3 = b64.indexOf(data.charAt(i++));
h4 = b64.indexOf(data.charAt(i++));
bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
o1 = bits >> 16 & 0xff;
o2 = bits >> 8 & 0xff;
o3 = bits & 0xff;
if (h3 == 64) {
tmp_arr[ac++] = String.fromCharCode(o1);
} else if (h4 == 64) {
tmp_arr[ac++] = String.fromCharCode(o1, o2);
} else {
tmp_arr[ac++] = String.fromCharCode(o1, o2, o3);
}
} while (i < data.length);
dec = tmp_arr.join('');
return dec;
}
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