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flametrench/identity
====================

Identity primitives for Flametrench: users, credentials (Argon2id-pinned passwords, passkeys, OIDC), and user-bound sessions with rotation on refresh.

v0.2.0(1mo ago)025[1 issues](https://github.com/flametrench/identity-php/issues)1Apache-2.0PHPPHP ^8.3CI passing

Since Apr 25Pushed 3d agoCompare

[ Source](https://github.com/flametrench/identity-php)[ Packagist](https://packagist.org/packages/flametrench/identity)[ Docs](https://flametrench.dev)[ RSS](/packages/flametrench-identity/feed)WikiDiscussions main Synced 1w ago

READMEChangelog (3)Dependencies (2)Versions (11)Used By (1)

flametrench/identity
====================

[](#flametrenchidentity)

[![CI](https://github.com/flametrench/identity-php/actions/workflows/ci.yml/badge.svg)](https://github.com/flametrench/identity-php/actions/workflows/ci.yml)

Identity primitives for [Flametrench](https://flametrench.dev): users, credentials (Argon2id-pinned password + passkey + OIDC), user-bound sessions with rotation on refresh, and v0.2 multi-factor authentication ([ADR 0008](https://github.com/flametrench/spec/blob/main/decisions/0008-mfa.md), [ADR 0010](https://github.com/flametrench/spec/blob/main/decisions/0010-webauthn-rs256-eddsa.md)) — TOTP (RFC 6238), recovery codes, and WebAuthn assertion verification across ES256 / RS256 / EdDSA.

The PHP counterpart of [`@flametrench/identity`](https://github.com/flametrench/node/tree/main/packages/identity). Same shapes, same lifecycle, same Argon2id parameter floor, same opaque-bearer-token-vs-session-id distinction.

**Status:** v0.2.0 (stable). PHP 8.3+, ext-sodium required (for token base64url encoding). Includes the production-ready `PostgresIdentityStore` alongside the in-memory reference store. Per ADR 0014 the `User` entity carries an optional `display_name` with a partial-update `updateUser` operation; per ADR 0015 `listUsers` provides cursor-paginated user enumeration with a credential-identifier substring filter; per ADR 0013 the Postgres adapter cooperates with adopter-side outer transactions via savepoints when nested.

Install
-------

[](#install)

```
composer require flametrench/identity
```

Quick start
-----------

[](#quick-start)

```
use Flametrench\Identity\InMemoryIdentityStore;

$store = new InMemoryIdentityStore();

// Create a user + a password credential.
$user = $store->createUser();
$cred = $store->createPasswordCredential($user->id, 'alice@example.com', 'correcthorsebatterystaple');

// Verify and open a session.
$verified = $store->verifyPassword('alice@example.com', 'correcthorsebatterystaple');
$sw = $store->createSession($verified->usrId, $verified->credId, ttlSeconds: 3600);

// Later, verify an incoming bearer token.
$session = $store->verifySessionToken($sw->token);
```

Argon2id is pinned
------------------

[](#argon2id-is-pinned)

Password credentials use PHP's native `PASSWORD_ARGON2ID` at the spec floor (`m=19456, t=2, p=1`). These match the OWASP Password Storage Cheat Sheet floor and are the same parameters used by `@flametrench/identity`. Implementations MUST NOT use bcrypt, scrypt, PBKDF2, or any other algorithm — the spec is opinionated on this point because inconsistency causes breaches.

Sessions: tokens vs. ids
------------------------

[](#sessions-tokens-vs-ids)

The session `id` is an **identifier** (appears in logs, audit, admin). The bearer **token** is separate — 32 random bytes, base64url-encoded — and only the SHA-256 hash is persisted. The plaintext token is returned exactly once from `createSession` / `refreshSession` and never leaves the caller's control via this SDK. Same separation as the spec defines.

`refreshSession` rotates: new session id, new token, old session revoked. In-place refresh is not spec-conformant.

Credential type discrimination
------------------------------

[](#credential-type-discrimination)

PHP doesn't have discriminated unions, so credentials are three concrete classes implementing the `Credential` interface:

```
$cred = $store->getCredential($credId);
match (true) {
    $cred instanceof PasswordCredential => /* ... */,
    $cred instanceof PasskeyCredential  => /* ... */,
    $cred instanceof OidcCredential     => /* ... */,
};
```

Sensitive material (password hash, passkey public key bytes) is stored internally and never exposed on the public Credential shape — verification uses `verifyPassword()` and never returns hash material to callers.

Errors
------

[](#errors)

ClassCode`NotFoundException``not_found``DuplicateCredentialException``conflict.duplicate_credential``InvalidCredentialException``unauthorized.invalid_credential``CredentialNotActiveException``conflict.credential_not_active``CredentialTypeMismatchException``conflict.credential_type_mismatch``SessionExpiredException``unauthorized.session_expired``InvalidTokenException``unauthorized.invalid_token``AlreadyTerminalException``conflict.already_terminal``PreconditionException``precondition.`Cascade semantics (spec-required)
---------------------------------

[](#cascade-semantics-spec-required)

- **Revoking a user** revokes every active credential AND terminates every active session.
- **Suspending a user** terminates every active session but leaves credentials alone (the user can be reinstated and their creds still work).
- **Rotating a credential** terminates every session that was established by the old credential.
- **Suspending or revoking a credential** terminates every session bound to it.

All cascades are atomic in the in-memory store; tests have explicit fixtures for each.

Development
-----------

[](#development)

```
composer install
composer test
```

License
-------

[](#license)

Apache License 2.0. Copyright 2026 NDC Digital, LLC.

###  Health Score

41

—

FairBetter than 87% of packages

Maintenance96

Actively maintained with recent releases

Popularity9

Limited adoption so far

Community8

Small or concentrated contributor base

Maturity45

Maturing project, gaining track record

 Bus Factor1

Top contributor holds 100% of commits — single point of failure

How is this calculated?**Maintenance (25%)** — Last commit recency, latest release date, and issue-to-star ratio. Uses a 2-year decay window.

**Popularity (30%)** — Total and monthly downloads, GitHub stars, and forks. Logarithmic scaling prevents top-heavy scores.

**Community (15%)** — Contributors, dependents, forks, watchers, and maintainers. Measures real ecosystem engagement.

**Maturity (30%)** — Project age, version count, PHP version support, and release stability.

###  Release Activity

Cadence

Every ~0 days

Total

9

Last Release

40d ago

### Community

Maintainers

![](https://avatars.githubusercontent.com/u/19826928?v=4)[Nathan Call](/maintainers/nathancall)[@nathancall](https://github.com/nathancall)

---

Top Contributors

[![nathancall](https://avatars.githubusercontent.com/u/19826928?v=4)](https://github.com/nathancall "nathancall (26 commits)")

---

Tags

identityUserssessionscredentialspasskeyoidcArgon2idflametrench

###  Code Quality

TestsPest

### Embed Badge

![Health badge](/badges/flametrench-identity/health.svg)

```
[![Health](https://phpackages.com/badges/flametrench-identity/health.svg)](https://phpackages.com/packages/flametrench-identity)
```

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