/usr/bin/passwd offers a "safe way" for root to edit /etc/passwd (or shadow). If setuid it allows regular users to change passwd without asking root to do changes for them.
(note: does have learning curve on args to choose)
gnupasswd - gnu change user password
gnugpasswd - gnu change group password
gnupasswd(1) has a goal to work with older login.c/linux and some newer too, also "getpwent" (any glibc). or help convert.
gnupassd does pass only: leaves all else alone (compat). ...
The WiKID Strong Authentication System is a public-key based two-factor authentication system. It is a flexible, extensible, and secure alternative to tokens, certs and passwords. Application & API support exists for Java, ASP, PHP, Ruby, OpenVPN, TACACS+, etc.
Read our eGuide on how to setup your network with two-factor authentication: http://www.wikidsystems.com/learn-more/two-factor-authentication-white-papers
Authentication, Access Control, and Single Sign-On
DACS,a light-weight single sign-on and role-based security system for Apache or server-based software, provides comprehensive authentication capabilities, and powerful, transparent rule-based authorization checking for any web service or CGI program.
The latest release is DACS 1.5.1 (26-Oct-2025)
It is not available here!
Get it at https://dacs.dss.ca/download.html
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Provide an LDAP client API for Python, C wrapper module around OpenLDAP 2.x with an object-oriented API, several additional modules for processing LDIF, LDAP URLs and LDAP schema information
Unlike most LDAP authentication solutions this module integrates into Jabberd14 server using its module API (JSM). It consists of two parts - module itself and XDB helper. This module supports versions 1.4 and 1.6 of jabberd.
An all-in-one authentication with mysql as backend. Features: - Howto/Document - user info - libnss-mysql - pam-mysql - usersql - pdbsql (samba) - radius-mysql - mail
Ruby/LDAP is an extension library for Ruby. It provides the interface to some LDAP libraries (e.g. OpenLDAP, Netscape SDK and Active Directory). The common API for application development is described in RFC1823 and is supported by Ruby/LDAP.
The Password Auditing Project will be a compilation of other, previously released password auditing programs, in such a fashion as to reap the best benefits of each portion. Pulling innovations from John the Ripper, Lepton, Rainbow Tables, and more.
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A project to develop a single point of configuration and administration for user management on Unix systems, independent of the protocols actually used.
Extends the Name Service Switch (NSS) API, enabling superior integration with network databases. Various sources, such as MySQL, extend naming services such as /etc/passwd - allowing for better data management and single sign-on capabilities.
SMSec is a free , open source, GPLed implementation of two-factor authentication via SMS (Short Message Service). It uses SMSD to "talk" to GSM modems, provides a flexible XMLRPC web-service for web-developers integrate SMSec into their web-apps.
Perl Extensions for OpenLDAP is a PERL extensions package derived from the PerLDAP package. The goal of Perl Extensions for OpenLDAP is to expose the native OpenLDAP C API, as is, to programs written in the PERL language. This package differes from othe
DS Password Tools are a pair of command line tools for changing passwords on Mac OS X and Mac OS X Server (versions 10.2.x) that make use of the Directory Services API. Unlike the included passwd program, these tools are compatible with Password Server.