Credential Validation Modules. This package contains:
- The reference source for the CVM interface.
- Diagnostic and benchmark CVM clients.
- A checkpassword interface CVM client.
- A UNIX/POSIX system module (uses getpwnam).
- A flat-file module.
- A vmailmgr module.
- MySQL and PgSQL modules.
- A library for client writers.
- A set of libraries for module writers.

Homepage:
https://untroubled.org/cvm/
