This project is based on work for the original Google Authenticator application for Google's Two-Factor Authentication scheme. That program was originally an applet for Android, iPhone, and Blackberry devices. THIS WORK USES THEIR PRINCIPLES AND PROCEDURES, BUT DOES NOT DIRECTLY DERIVE FROM THEIR CODE!
http://code.google.com/p/google-authenticator/ Forgive me for using their icon.
This is my Windows clone so that you don't need your phone to log into Google if you have Two-Factor Authentication enabled.
The program can also produce barcodes similar to the ones that Google produces once the account information has been entered. This is good for putting the account info into your phone. AND the program can READ BARCODES SAVED TO FILES! So if you screen-cap the barcode into a file from Google when you set your account up, you can then use that file (one barcode per file) to enter the account info into this program, eliminating human error on data entry. This app can store a (reasonably) limitless number of accounts, so ALL of your Google accounts can live in the same app. The accounts are stored encrypted for added safety. The master password has complexity requirements to prevent lazy and weak passwords. NOTE: This does not store or use your actual Google passwords, this ONLY calculates the time-based OTP's used during login when you have Two-Factor Authentication enabled.
NEW! September 28, 2012Added: Key displayed on DisplayBarcode form to allow for direct entry into Authenticator App on your phone or other device. This is nice for phones or devices with no camera. The Google Authenticator team added the direct key entry field in the app, this update to my program reflects that additional capability.
Added:
I'm including the barcode DLL in the downloadable zip for the sake of the sanity of the end users. The TWIT88 site has changed enough that I can't seem to find it to direct link to it anymore.
February 22, 2012Fixed-version release that is a drop-in replacement for the Sep 2nd release, but NOT for any older releases. When in doubt, manually back up your account data via screen-capping the barcodes.
September 2, 2011WARNING A recent breaking change was made to the SkeinLib DLL to move it to 64 bit operation. This change has prompted me to REMOVE THE DLL REFERENCE. You will no longer need SkeinLib for this program. HOWEVER, THIS IS ALSO A BREAKING CHANGE FOR HOW ACCOUNTS ARE STORED! BACKUP YOUR ACCOUNTS BEFORE UPDATING TO THE LATEST VERSION. Use the barcode feature and screen cap the codes for each account individually, then delete the Accounts.dat file before updating to the new version.
REQUIRES:-Messaging Toolkit for QR Codes. This provides the barcode functionality. You will need the DLL from this library for 32 and 64 bit machines (same DLL).
http://twit88.com/platform/projects/show/mt-qrcode BROKEN LINK!! : (
Known issue: Network folders (or redirected folders residing on the network) are not supported. They cause ArgumentExceptions for the file handling routines. If you must use a network folder, map it to a drive letter.
Special thanks to Hemant Jangid for his Code Project article and code for Base32 encoding/decoding and to the Google dev team for the original Authenticator program, and to twit88 for their QRCode library.