This project provides a pure JavaScript implementation of the OpenBSD `bcrypt_pbkdf` function, which combines Blowfish and SHA-512 to derive cryptographic keys from passwords and salts. It's a port of the OpenBSD implementation, with minor performance improvements, and is designed for developers who need to use the `bcrypt_pbkdf` algorithm in Node.js applications without relying on native code. The library is useful for cryptographic operations requiring key derivation, such as secure password storage or encryption key generation.