librecrypt

Description: Offline-hardenable password hashing
Status: Stable
Source: https://git.maandree.se/librecrypt
Latest release: 1.0
License: ISC License (Internet Systems Consortium license)
Written in: C (ISO C99), C (ISO C17)

librecrypt is a C library that provides a unified interface for several password hash functions and the ability to chain password hash functions so that a weaking hashed password can be hardend, without knowing the plain-text password, by hashing the hash with a stronger function.