LinOTP is a solution for strong two-factor authentication with one time passwords. It features a modular architecture into which UserIdResolver, authentication, and OTP calculation modules can be plugged. It includes UserIdResolver modules for LDAP/AD, SQL, and flat file user databases, and authentication modules for PAM and RADIUS. New modules can be developed easily. Supported tokens are HMAC-OTP/HOTP (RFC 4226/ OATH compliant), Aladdin eToken PASS, eToken NG-OTP, Safeword Alpine, Google Authenticator, motp, SMS OTP/Mobile TAN, and a Simple Pass token for users without token hardware. TOTP is supported, along with a new algorithm for daily passwords for applications not supporting RADIUS. CLI, Web, and GTK+ GUI clients are available for management. LinOTP features multi-client capability, redundancy, and a self-service portal. It has been used with PAM for local and SSH logins, Apache, VPN, and Windows Terminal Server, and is OATH certified.
RCDevs OpenID Provider is an OpenID 1.1 and 2.0 provider with simple registration and multiple OpenID URL formats. Compared to other OpenID provider implementations, RCDevs OpenID Provider is extremely easy to implement: provided that you have a working WebADM server, installation just consists of adding the OpenID WebApp in WebADM and adding a markup in the index page of your public Web site. The RCDevs OpenID Provider works with LDAP and OpenOTP authentication back-ends. With OpenOTP, your OpenID users can authenticate with any OpenOTP one-time password mechanism (Soft Tokens, SMSOTP, MailOTP, Yubikey, MobileOTP). RCDevs OpenID Provider supports both query-string-based OpenID URLs and hostname-based OpenID URLs. An example of the format using a query string is "http://rcdevs.com/?user=myuser&domain=mydomain" and an example of the format using a hostname is "http://myuser.mydomain.rcdevs.com/".