PBKDF2 key derivation

Introduction

Offers a PBKDF2 key derivation function that works on PHP 5 below PHP 5.5. On PHP 5.5, the builtin hash_pbkdf2 will be used.

Installation

• Install https://github.com/limoengroen/hash-pbkdf2 into your libraries folder (eg sites/all/libraries) as hash-pbkdf2.
• Enable the module.

Usage

This is an API module, there is no interface.

API usage

pbkdf2($algorithm, $password, $salt, $count, $key_length, $raw_output = false)

• $algorithm - The hash algorithm to use. Recommended: sha256
• $password - The password.
• $salt - A salt that is unique to the password.
• $count - Iteration count. Higher is better, but slower. Recommended: At least 1000.
• $key_length - The length of the derived key in bytes.
• $raw_output - If true, the key is returned in raw binary format. Hex encoded otherwise.

Returns: A $key_length-byte key derived from the password and salt.

Credits

Taylor Hornby (defuse.ca) for the PBKDF2 PHP implementation.