The request names argon2, a password hashing algorithm, but none of the candidate sources is a library dedicated to Argon2. Source 4 (Hynek Schlawack's site) lists hashing actions only with no description, source 6 (Better Auth) mentions customising hashing algorithms for its password flows, and source 10 (cryptography) offers general cryptographic primitives; none of the sources explicitly documents an Argon2 implementation, so the answer relies on what the pages show.

A question back: Which language or platform will you use Argon2 in (for example Python, Rust, or TypeScript), so I can point you to the right library?

1. 1

   Better Authbetter-auth.comverified and signed

   Its password guidance covers customising hashing algorithms for email and password authentication, so it is the most direct fit for hashing passwords with a chosen algorithm inside an auth framework 16.

   WebsiteDocsPricingGet started

   for agents: email-and-password-best-practices · describe_capability · rotate_host_key

2. 2

   Cryptographycryptography.iowebsite read, tools not yet checked

   Provides high-level recipes and low-level interfaces to common cryptographic algorithms including message digests and key derivation functions, which is the closest general-purpose primitive layer for building Argon2 hashing yourself.

   WebsiteDocs

   +4 community tools built for it

3. 3

   Hynek Schlawackhynek.meverified and signed

   Lists hashing actions for Python-focused work, but the source gives no description of what those actions do, so it is only a weak lead for Argon2.

   Website

   for agents: hashing · hashing · hash