Here's a port of jotp to Java 2 Platform Micro Edition (J2ME), so that it can be used on mobile phones that supports Java. I made this so that I can securely connect to our ssh-server from insecure internet cafees, where people might be trying to sniff my passsword. The midlet supports md5-hashing, since that's what I'm using. Adding md4 should be trivial, if anybody needs it.
I use this with an openssh server configured with —with-skey, to securely log into my servers from unsecure terminals.
You will need the Sun Java Wireless Toolkit for CLDC to build it from source. The Sun Java Wireless Toolkit also includes an emulator, so that it's easy to test the application without uploading it to the phone. Very handy for development. To test it in the emulator, download the .jad and .jar and execute: emulator -Xdescriptor:jotp.jad.
Emulator screenshot.
When I developed this, I had a Nokia 6310, which (un)fortunately didn't manage to run j2me-otp because of lack of memory. It only had 128KB static and 50KB dynamic memory. So I had an excuse to buy a new phone, a Nokia 7310 series 60 phone, where it worked well. A few other phones reported to work:
Sony Ericsson Z520i
Sony Ericsson K800i
Sony Ericsson W810i
Sony Ericsson W880i
Sony Ericsson T610
Siemens SX1
Siemens SK65
Nokia 7310
Nokia 6820
Nokia 6600
Nokia 6230i
Nokia 6021
Nokia 3650
Nokia 3410
Nokia E61
Nokia E65 (my new smartphone :-)
Nokia Communicator 9300, 9300i and 9500
Motorola Razor v3i
But I suspect any modern phone with java support should handle it.
j2me-otp project home at code.google.com. Report bugs here.
Heise article on otp, which mentions my j2me-otp.
For more information in otp and jotp, check the original jotp applet authors page at http://www.cs.umd.edu/users/harry/jotp/
Please email any comments to Jan-Frode Myklebust, janfrode@tanso.net.
