Javascript Encryption XOR, Etc
Jul 7, 2006
I would like to implement a simple javascript code encryption(XOR,
unicode, etc) using javascript. Could someone tell me where to find a
ready javascript implementation of XOR (or of another very known
algorithm, simple) for html page? I want that encryption method works
reliable on most browsers, at least on MSIE + Firefox + Netscape. As
html page based encryptor.
First i need encrypt javascript use some algorithm, that provides
compact output. When the protected script first starts, a small
decrypter stub is first run that restores all of the original script
commands for the browser. (encoded scripts will have a decoder stub
prefixed before the code that is actually executed). This method will
provide protection from machines, like email harvesters, bots, software
etc - not from human. But this is fully enough for me.
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Dec 28, 2003
Yes, I know it's not a solid form of encryption, but this was not my goal when beginning this script. It simply provides a simple encryption when you want things hidden and not read too easily.
Essentially the script takes in a string and a password and uses the password as a key to encrypt the string. It can be used to encrypt short messages or entire pages.
I personally have set up a prompt asking for the password, but you could also use a textbox. You could also set up cookies to remeber the password while the user is on your site, but then you must leave the password in the cookie unencrypted.
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Nov 3, 2009
i need to know how do encryption by aes using ecdh key in java.
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Dec 14, 2010
I've been working on RSA encryption using javascript and php for quite some time but i'm not able to do it properly. i'm using the standard RSA.js,BigInt.js and Barrett.js javascript files for the javascript part but the thing that i have noticed is the public exponent is always 10001 or 3 . only then the function works. but the problem is the php file generates a comparatively larger public key exponent. if i use that in the javascript function it crashes.
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Nov 9, 2011
I am having trouble with a script that works with the link invisibly which you can see the cursor change to a pointer hand when hovering next to "Email:".It would show if you placed the script in the body portion of a blank HTML page.In my website below I can't figure out why the link doesn't show and is invisible.This emailHide.html.txt file is below, to view in HTML remove the .txt extention and save and view in browser.
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Jul 10, 2011
I am working on an ajax application to upload and download encrypted files (AES, 128 bit). The encryption has to be on the client side before sending it to the server.
1. Upload The secret key is stored in a javascript variable during the session. To upload a file, javascript code will show a prompt file dialog and the user will select the file. On hitting submit button a javascript code will call a method in a java applet (with secret key and filename as parameters) that will read the file, encrypt it and sent to the server. I am still coding this but seems to me there will be no problem, the applet even doesn't need to be signed.
2. Download This is where I have the problem.I want the user to click the link, the file should be downloaded, decrypted and opened or 'saved as..'. Is this possible to do in a way that the user doesn't have to do intermediate steps, like 1. Download, 2. Decrypt. 3 Open by the corresponding application ? Right now the idea is to use XMLHttpRequest to download the file into a javascript variable and pass it to the applet, the applet will decrypt and save the file into a temporal directory on the user's computer. After that javascript will present a link that the user will click to open the file. But that are 2 steps and I have to sign the applet to be able to write files. Is there a way to do this as a single process (with an unsigned applet) and at the end to show the 'Save as...' dialog so the user will decide wether to save it or to open with some application?
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Jul 23, 2005
I'm working on some code and am running into brick walls. I'm trying
to write out Javascript with Javascript and I've read the clj Meta FAQ
and didn't see the answer, read many similar posts (with no luck
though), and searched through the IRT.ORG Faqs
(www.irt.org/script/script.htm).
The Javascript is designed to open an popup window and then inside that
window call another script which will resize that window. There may be
another way around this but the reason I tried this approach initially
was that I wanted to call the onload handler in the popup window to
resize the image only after the image had completely loaded. I've had
some code in the primary Javascript file (showimage.js) before that
works if the image has been cached but on the first load, it doesn't
resize properly which tells me it is probably because it is trying to
resize the window based on the image size but it isn't completely known
at that point. So I removed that code and tried placing the resizing
code in the second Javascript file (resizewindow.js). BTW I've tried
other code to open a popup image and automatically size it ie Q1443 at
irt.org but that doesn't do exactly what we need.
Even if there is another way to do this with one file, I still want to
figure out why this isn't working in case I run into it in the future.
I thought what I would need to do to use document.writeln to write
Javascript would be to escape any special characters and to break
apart the script tag ie
document.writeln('</SCRIPT>');
would become
document.writeln('</SCR' + 'IPT>');
I have a HTML page and 2 Javascript files. All files are in the same
directory and have permissions set correctly.
Here are the 3 files (keep in mind wordwrap has jacked up the
formatting):
index.html
----------
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Test</title>
<SCRIPT type="text/javascript" LANGUAGE="JavaScript1.1"
SRC="showimage.js">
</SCRIPT>
</head>
<body>
Click the house<BR>
<A ONCLICK="newWindow1('house1.jpg','Nice House')"><IMG
SRC="house1thumb.jpg"></A>
</body>
</html>
showimage.js
------------
function newWindow1(pic,sitename)
{
picWindow=window.open('','','width=25,height=25,sc rollbars=1,resizable=1');
picWindow.document.writeln('<html> <head>');
picWindow.document.writeln('<SCR' + 'IPT type="text/javascript"
LANGUAGE="JavaScript1.1" SRC="resizewindow.js"></SCR' + 'IPT>');
picWindow.document.writeln('</head>');
picWindow.document.writeln('<body onload="resizewindow();">');
picWindow.document.writeln('<img src=' + pic + '>');
picWindow.document.writeln('</body> </html>');
picWindow.document.close();
}
resizewindow.js
---------------
function resizewindow()
{
// Do resizing here.
// Right now this isn't being executed
alert("resizing window");
}
Can anyone provide some pointers as to why this javascript is failing?
I'm using IE6 on Win2k and when I click on the image to open the popup
window, it does open the window but it is white with no content and the
system immediately goes from about 4% CPU usage to 100% and
consistently stays there until I kill that window with the task
manager.
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Jul 23, 2005
Attached is a simple HTML file that adds and delete rows. In the add
row function I set an attribute "onClick" this triggers the
testMessage() function. When I try this in Firefox it works just fine
however on IE it just refuses to work.
What is interseting is the ROW that already exists has a similar
'onClick' event which works when the page is loaded, but subsequent
"row" additions to the table to not work in IE. Code:
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Feb 19, 2007
two possibilities or the attribute type of script:
text/javascript (the one i usually use) application/x-javascript
what are the differencies between both?
depends on the html content?
for example html 4.0.1 versus xhtml 1.1?
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May 25, 2005
I'm getting errors in Firefox everytime I try to run this frame resize code, but it works fine in IE. I can't seem to figure out what the problem is with it.
The error is: Error: theFrame has no properties
Line: 8
The line that the javascript console is showing an error for is in italics.
code from page:
<html>
<head>
<script type="text/javascript">
var defaultCols="100px,*";
var hiddenCols="0px,*";
function ShowHideMenu(){
theFrame = document.getElementById("framed");
if(theFrame.cols == defaultCols) theFrame.cols=hiddenCols;
else theFrame.cols=defaultCols;
}
</script>
<frameset cols="100px,*" name="framed">
<frame src="lframe.htm" name="frameMenu">
<frame src="mframe.htm" name="content">
</frameset>
</head>
<body>
</body></html>
Come someone let me know what I'm doing wrong here?
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Mar 30, 2006
I'm already past the basics of Javascript, and i need something that takes me to the other level and teaches me the new technologies and cool stuff (drag&drop, AJAX, OOP in javascript, maybe XUL...etc). So far i found these two books:
1. Sitepoint's "The JavaScript Anthology: 101 Essential Tips, Tricks & Hacks".
2. Worx's "Professional JavaScript for Web Developers (Wrox Professional Guides)"
Both seems to cover very insteresting topics, but i can only buy one of them. So which one do you suggest?
and by the way, i've read the sample chapter 5 of Sitepoint's book, and it seems like the author(s) just put the solutions/codes there and let you figure them out on your own. Is this how the rest of the chapters are?
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Jul 23, 2005
This is a question about defensive web browsing. Ocassionally I run into a page whose JavaScript does something that I find obnoxious. I would like to turn off JavaScript only for that page (instead of disabling it globally). It would be cool if there were some way to do this through a "bookmarkable" JavaScript snippet using the javascript: pseudoprotocol. Does anyone know any trick to do any of this?
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May 26, 2006
I am looking for a method to extract the links embedded within the
Javascript in a web page: an ActiveX component, or example code in
C++/Pascal/etc. I am looking for a general solution, not one tailored
to a particular page/script.
Hopefully, the problem can be solved without recreating a complete
Javascript interpreter. Any ideas?
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Oct 21, 2005
I have some javascript that I have written into the <body> section and it works great. But I would like to make it into a javascript function and define the function in the <head> section. Then in the <body> section write a small bit of javascript that would call the function() object. Code:
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Jan 7, 2006
I would like to know how to write javascript such that, a part of it isnt considered as script, & rather as HTML. Code:
Ok, the layer div can be written using document.write. But, Google ad itself is a javascript isnt it. How can it be written into this? How does this work?
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Apr 28, 2006
Ok so, this is my purpose:
- to be able to load asynchronously (via AJAX) some javascript ads (like google's or adbrite) so as to make them be loaded in the background, then update the page after the ads have loaded via innerHTML
Why?
-Because 90% of the time in my newer sites, javascript ads are the major offender in terms of speed of page rendering
My problem:
Via ajax, I can call a php file that retrieves some javascript and outputs it, XMLhttprequest returns those javascript lines, but they don't render in the page, since they miss the whole page loading, and are apparently not parsed
For example, let's say I call a php file via ajax, and it returns the output into a variable named "text" containing "document.write('hello')"
if I use xxx.innerHTML=text, nothing happens
My 1st solution:
Passing those javascript lines to eval() [like eval(text) ], but this produces a second problem, that I couldn't solve (probably because of my lack of knowledge in javascipt):
if I eval the code, it deletes my current page and renders a new one
for example, if I parse a document.write, my page disappears, and a new one is rendered with the document.write text
What I want is basically to make that "document.write" appear inside a div in my page, adding to the content (and not overwriting the whole page), much like what happens when using innerHTML
Is this even possible? How would you go about it?
I tried xxx.innerHTML=eval(outputfromphpfile) but it overwrites my whole page...
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Nov 26, 2000
Just a quickie: is it possible to place javascript within javascript? The following is the code I am using to create a pop-up for a picture gallery. I would like to place a banner from a banner exchange in bold under each photo. When I use the code below I get an error message:
<SCRIPT language=JavaScript>
<!--
function openpic(pic_name) {
myWin= open("", "displayWindow", "width=640,height=510,status=no,toolbar=no,
menubar=no,scrollbars=yes,resizable=yes,alwaysraised=yes");
myWin.document.open();
myWin.document.write("<html><head><title>" + pic_name + "</title>");
myWin.document.write("</head><BODY><center><TABLE CELLPADDING=Ɔ' CELLSPACING=Ɔ' WIDTH=òr'>");
myWin.document.write("<br><img src=kate/image"+ pic_name + ".jpg><br>");
myWin.document.write("<br><br><BR><br><BR><br><BR>");
myWin.document.write("<script language='javascript' type='text/javascript' src='http://www.linkbuddies.com/ad.go?id=134039+2&n=3'></script>");
myWin.document.write("</center></body></html>");
myWin.document.close();
}
//-->
</SCRIPT>
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Dec 12, 2005
Basically, on one of my sites I'm running adsense and today I added Chitika. The problem is, I can't run those type of ads through my banner advertising program.
The banner advertising program calls the banners/HTML from code like this:
<script language=JavaScript src=http://www.mysite.com/advertise/abm.asp?z=1></script>
And using that program I'm able to either choose a banner or HTML I want to display when that code above is used. It displays HTML ok... but when I try to run an ad of either adsense or chitika nothing displays on the page. The code that would be called is:
<script type="text/javascript"><!--
*Chicika code in here*
//--></script>
<script src="http://xxx/xxx/mm.js" type="text/javascript">
</script>
So... it looks like I can't have javascript call another javascript to display on a page. My question is then... how can I edit the above to make it work or how can I work around this problem? I'd really want this to work with Chitika and not so much with adsense... but it appears both Chitika and Adsense use similar javascript code.
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Jul 26, 2006
is it possible to use functions from javascript file A.js in javascript file B.js?
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Jul 23, 2005
How can I pull this ASP var into javascript?
What is wrong with this statement?
<%
todaysdate = (now)
response.write (todaysdate)
%>
<script language="JavaScript"><!--
var date = new Date();
var aspdate = <%=todaysdate %>
document.write(aspdate);
//--></script>
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Jul 23, 2005
does a client side script always need a server side script in order to
function?
how can i get my javascript application to send the details of a user
filled form to me without having to have a server side script?
if i have both server side and client side script in a web
application, will the resulting application run as a client or server?
i know i probably haven't made much sense, but the problem is that i'm
trying to make sense of it all.
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Jul 23, 2005
I'm looking for javascript IDE with code completition and preferably script debuging. Cross platform (Windows, Linux) would be a plus.
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Jul 23, 2005
I have javascript function in my jsp page. Function does following :
text1 += '<xupdate:insert-before></xupdate:insert-before>;
but i get exception that <jsp:root> expected . Slash is a problem. I try
change it to > but it does nothing. Is there other solution??
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Sep 22, 2005
How can I use NSS (Network Security Services) from Mozilla/Firefox
Javascript?
I'm trying to sign some data using a private key in Javascript. I know
the crypto module should allow that with the signText method, but some
of the crypto methods seem to be broken, raising Not Implemented
exceptions.
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Dec 15, 2005
I know this subject has been well discussed, but I haven't found
exactly what I'm looking for in the archives, or if it's possible.
I need to call a cgi (actually, mod_perl) script, but not on every page
hit - preferably just on the first. I'm dealing with a static site and
what I'd like to do is use javascript to read a cookie, and if the
cookie is found, I'll use the value from the cookie to display some
html.
However, if the cookie isn't found, then I need to call a perl script
that will do some processing, set a cookie, but somehow I need to get
the value back - the same value that is used to set the cookie -
without reloading the page. I know I can use javascript
src="/path/to/myscript" and have the Perl script write javascript
(setting my variable which I can use later), but then I couldn't use
the "if" logic to see if I actually need to call the Perl script as the
client side javascript will be overridden by the "src" attribute...
Example code...
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Jan 19, 2006
Is there a way in javascript to do an if else that shows a script in an
iframe? Let me know if that doesn't make sense. We have a portal and
in a portlet I need to grab these javascript links to display in the
portlet if a user selects a certain city. Let me know if this can be
done. Code:
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