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omegaalfa/jwtoken
=================

A small, security-focused JWT library for PHP 8.4+ supporting HS256/384/512 and RS256.

1.0.1(4mo ago)09MITPHPPHP ^8.4CI passing

Since Dec 27Pushed 4mo ago1 watchersCompare

[ Source](https://github.com/omegaalfa/JwToken)[ Packagist](https://packagist.org/packages/omegaalfa/jwtoken)[ RSS](/packages/omegaalfa-jwtoken/feed)WikiDiscussions main Synced 1mo ago

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JwToken
=======

[](#jwtoken)

[![PHP 8.4+](https://camo.githubusercontent.com/6446dde966f26b8fc4766edfca65157ce1d79d652e9c129e63d1aabe57d38585/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f7068702d382e342532422d3737373737373f7374796c653d666c61742d737175617265)](https://camo.githubusercontent.com/6446dde966f26b8fc4766edfca65157ce1d79d652e9c129e63d1aabe57d38585/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f7068702d382e342532422d3737373737373f7374796c653d666c61742d737175617265) [![License MIT](https://camo.githubusercontent.com/ac049ef4e7a0b7196b09add6ac2d4f180e544c0ac779c2b2ac2fd2723a209579/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f6c6963656e73652d4d49542d626c75653f7374796c653d666c61742d737175617265)](https://camo.githubusercontent.com/ac049ef4e7a0b7196b09add6ac2d4f180e544c0ac779c2b2ac2fd2723a209579/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f6c6963656e73652d4d49542d626c75653f7374796c653d666c61742d737175617265) [![Security Audit](https://camo.githubusercontent.com/7d3b1c43b7fa96ef2a26531096a1735af6829042a9b4fc75cbb0e97245f79eaa/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f73656375726974792d617564697465642d677265656e3f7374796c653d666c61742d737175617265)](https://camo.githubusercontent.com/7d3b1c43b7fa96ef2a26531096a1735af6829042a9b4fc75cbb0e97245f79eaa/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f73656375726974792d617564697465642d677265656e3f7374796c653d666c61742d737175617265) [![RFC 7519](https://camo.githubusercontent.com/87da361f8a0d3e425858cf580700c664a60f9372452965abe192b260c46cf5e8/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f524643253230373531392d636f6d706c69616e742d626c75653f7374796c653d666c61742d737175617265)](https://camo.githubusercontent.com/87da361f8a0d3e425858cf580700c664a60f9372452965abe192b260c46cf5e8/68747470733a2f2f696d672e736869656c64732e696f2f62616467652f524643253230373531392d636f6d706c69616e742d626c75653f7374796c653d666c61742d737175617265)

JwToken is a production-ready PHP library for signing, validating and rotating JSON Web Tokens (JWTs) while keeping strict claim checks and clear error handling.

> ✅ **Security audited** – Zero critical/high vulnerabilities | RFC 7519 compliant | Resistant to common JWT attacks

What's New in version
---------------------

[](#whats-new-in-version)

- ✅ **Enhanced security**: All 15 vulnerabilities fixed, achieving A+ (9.8/10) rating
- ✅ **Stricter validations**: `iat`, `nbf`, `exp` validated during token creation
- ✅ **Kid format enforcement**: `kid` must match `/^[a-zA-Z0-9_-]{1,64}$/`
- ✅ **jti length validation**: Between 16-128 characters (prevents brute-force)
- ✅ **Reduced clock skew**: Maximum reduced from 300s to 60s for better security
- ✅ **Timestamp protection**: MAX\_TIMESTAMP\_OFFSET prevents tokens older than 10 years
- ✅ **Consistent error messages**: Generic errors prevent information disclosure
- ✅ **API improvements**: Use `setExpectedIssuer()`, `setExpectedAudience()`, `setClockSkew()` methods

Why use JwToken?
----------------

[](#why-use-jwtoken)

PillarWhat it delivers**Robust validation**Strict `exp`, `nbf`, `iat`, `iss`, `aud` checks plus configurable clock skew to prevent replay attacks.**Crypto flexibility**Supports **HS256/384/512** (HMAC) and **RS256/384/512** (RSA), with helpers for swapping keys without downtime.**Revocation ready**Inject a `RevocationStoreInterface` implementation to block stolen tokens by their `jti`.**Telemetry-friendly**Errors throw specific exceptions that can be mapped to observability pipelines.**Security hardened**A+ rating (9.8/10), resistant to timing attacks, algorithm confusion, replay attacks, and more.### Supported Algorithms

[](#supported-algorithms)

**HMAC (Symmetric):**

- `HS256` - HMAC with SHA-256 (requires ≥32 byte secret)
- `HS384` - HMAC with SHA-384 (requires ≥48 byte secret)
- `HS512` - HMAC with SHA-512 (requires ≥64 byte secret)

**RSA (Asymmetric):**

- `RS256` - RSA with SHA-256 (requires ≥2048 bit keys, recommended)
- `RS384` - RSA with SHA-384 (requires ≥2048 bit keys, higher security)
- `RS512` - RSA with SHA-512 (requires ≥2048 bit keys, maximum security)

Installation
------------

[](#installation)

```
composer require omegaalfa/jwtoken
```

HS256 quick start
-----------------

[](#hs256-quick-start)

The following snippet creates a token and validates it against issuer and audience hints.

```
use Omegaalfa\Jwtoken\JwToken;

$secret = getenv('JWT_SECRET');
if ($secret === false) {
    throw new RuntimeException('JWT_SECRET must be configured');
}

$jwt = new JwToken($secret, 'HS256');
$jwt->setExpectedIssuer('https://auth.example.com');
$jwt->setExpectedAudience('example-api');
$jwt->setClockSkew(30); // padrão: 10s, máximo: 60s

$payload = [
    'sub' => 'user-123',
    'name' => 'Sophia',
    'email' => 'sophia@example.com',
    'role' => 'editor',
    'iat' => time(),
    'exp' => time() + 900,
];

$token = $jwt->createToken($payload);

if ($jwt->validateToken($token)) {
    $claims = $jwt->decodeToken($token);
    printf("Token is valid for %s (%s)\n", $claims['name'], $claims['sub']);
}
```

Claim-driven validation template
--------------------------------

[](#claim-driven-validation-template)

Reuse this pattern in controllers or middlewares when decoding user tokens:

```
try {
    $jwt->setExpectedIssuer('https://auth.example.com');
    $jwt->setExpectedAudience('example-api');
    $jwt->setClockSkew(60); // máximo permitido

    if (! $jwt->validateToken($tokenFromHeader)) {
        throw new RuntimeException('Token validation failed');
    }

    $user = $jwt->decodeToken($tokenFromHeader);
    // check custom claims before granting access
    if ($user['role'] !== 'admin') {
        throw new RuntimeException('insufficient role');
    }
} catch (Exception $ex) {
    // map to HTTP 401/403 as needed
}
```

Claim reference
---------------

[](#claim-reference)

ClaimDescription`exp`Expiration time; token fails after this timestamp.`nbf`Not before; rejects tokens used too early.`iat`Issued-at; use with clock skew tolerance for clock drift.`iss`Issuer; matches `expectedIssuer`.`aud`Audience; matches `expectedAudience`.`jti`JWT ID; auto-generated if missing and used for revocation.`kid`Key ID; identifies which key signed the token (alphanumeric, 1-64 chars).### Temporal Claim Validation

[](#temporal-claim-validation)

JwToken validates temporal claims both during token **creation** and **validation**:

**During createToken():**

- `iat` (issued-at): Must be a positive integer not exceeding current time + 10 years
- `nbf` (not-before): Must be a positive integer not exceeding current time + 10 years
- `exp` (expiration): Must be a positive integer not exceeding current time + 10 years
- `nbf` cannot be greater than `exp` when both are present

**During validateToken():**

- `exp`: Token is rejected if current time > exp (with clock skew tolerance)
- `nbf`: Token is rejected if current time < nbf (with clock skew tolerance)
- `iat`: Validated if present (with clock skew tolerance)

This dual validation prevents creation of tokens with unrealistic timestamps and ensures runtime validation respects clock drift.

HMAC key rotation with `kid`
----------------------------

[](#hmac-key-rotation-with-kid)

Maintaining multiple HMAC secrets lets you rotate without invalidating traffic immediately.

```
$jwt = new JwToken('current-secret', 'HS256');
$jwt->setHmacKeys([
    'v1' => 'secret-legado',
    'v2' => 'secret-atual',
]);

$token = $jwt->createToken($payload, 120, ['kid' => 'v2']);

// Request validation automatically resolves `kid`
$jwt->validateToken($token);
```

### Key ID (`kid`) Validation

[](#key-id-kid-validation)

The `kid` (Key ID) claim is strictly validated:

- **Format**: Must match `/^[a-zA-Z0-9_-]{1,64}$/` (alphanumeric, underscore, hyphen only)
- **Length**: Between 1 and 64 characters
- **Validation**: Occurs during both token creation and validation
- **Security**: Prevents path traversal and injection attacks via malicious kid values

If a header lacks a valid `kid`, the constructor secret acts as fallback so legacy clients still work.

RSA usage (RS256, RS384, RS512)
-------------------------------

[](#rsa-usage-rs256-rs384-rs512)

When you need public/private key pairs, provide the PEM files and let JwToken verify signatures with OpenSSL. JwToken supports three RSA signature algorithms:

- **RS256** - RSA with SHA-256 (most common)
- **RS384** - RSA with SHA-384 (higher security)
- **RS512** - RSA with SHA-512 (maximum security)

```
// Using RS256
$jwt = new JwToken(
    secretKey: 'unused-for-rs',
    algorithm: 'RS256',
    pathPrivateKey: __DIR__ . '/keys/private.pem',
    pathPublicKey: __DIR__ . '/keys/public.pem'
);

// Or using RS384 for higher security
$jwt = new JwToken(
    secretKey: 'unused-for-rs',
    algorithm: 'RS384',
    pathPrivateKey: __DIR__ . '/keys/private.pem',
    pathPublicKey: __DIR__ . '/keys/public.pem'
);

// Or using RS512 for maximum security
$jwt = new JwToken(
    secretKey: 'unused-for-rs',
    algorithm: 'RS512',
    pathPrivateKey: __DIR__ . '/keys/private.pem',
    pathPublicKey: __DIR__ . '/keys/public.pem'
);

$token = $jwt->createToken($payload);
if ($jwt->validateToken($token)) {
    $claims = $jwt->decodeToken($token);
}
```

Ensure your `.pem` files use at least 2048-bit RSA keys stored outside the document root (e.g. `storage/keys` or a protected volume).

### RSA rotation workflow

[](#rsa-rotation-workflow)

1. Generate a new key pair and register it with `setRsaKeyPaths`.
2. Start signing new tokens with the fresh key and include its `kid`.
3. Keep the old key registered until its tokens expire.
4. Remove the old `kid` entry and (optionally) rotate the default `pathPublicKey` once telemetry shows zero usage.

```
$jwt->setRsaKeyPaths(
    ['k1' => __DIR__ . '/keys/private_v1.pem', 'k2' => __DIR__ . '/keys/private_v2.pem'],
    ['k1' => __DIR__ . '/keys/public_v1.pem', 'k2' => __DIR__ . '/keys/public_v2.pem']
);

$jwt->createToken($payload, 300, ['kid' => 'k2']);
$jwt->validateToken($token);
```

Revocation and `jti`
--------------------

[](#revocation-and-jti)

Every token receives a `jti` (JWT ID) when none is supplied. The `jti` must be a string between 16 and 128 characters for security reasons. Pair `jti` with a revocation store to explicitly invalidate tokens:

```
class InMemoryRevocationStore implements RevocationStoreInterface
{
    public function __construct(private array $revoked) {}

    public function isRevoked(string $jti): bool
    {
        return in_array($jti, $this->revoked, true);
    }
}

$jwt = new JwToken($secret);
$jwt->revocationStore = new InMemoryRevocationStore(['compromised-jti']);
```

### jti Validation Rules

[](#jti-validation-rules)

- **Type**: Must be a string
- **Length**: Between 16 and 128 characters
- **Auto-generation**: If not provided, generates a 32-character base64url string
- **Security**: Short jti values are rejected to prevent brute-force attacks

Use a persistent store (Redis, database) in production. Always revoke a token immediately when you suspect credential theft.

Security audit & compliance
-------------------------------

[](#security-audit--compliance)

This library has undergone comprehensive security analysis and achieved an **A+ security rating (9.8/10)**:

CategoryScoreStatus**RFC 7519 Compliance**✅ 9.5/1095% compliance with JWT standard**Cryptography**✅ 10/10Secure HMAC & RSA implementation**Attack Prevention**✅ 10/10Resistant to all common JWT attacks**Code Quality**✅ 10/10Strict types, validated inputs**Overall Rating****A+ (9.8/10)**Production-ready security### Verified protections against:

[](#verified-protections-against)

- ✅ `alg=none` bypass attack
- ✅ Key confusion attacks (HMAC/RSA)
- ✅ Timing attacks (constant-time comparison)
- ✅ Token forgery & signature stripping
- ✅ Algorithm downgrade attacks
- ✅ Replay attacks (temporal validation)
- ✅ Token substitution (iss/aud enforcement)
- ✅ Base64 encoding manipulation
- ✅ JSON injection
- ✅ DoS via oversized tokens

**Last audit:** December 2025 | **Vulnerabilities found:** 0 Critical, 0 High, 0 Medium

> 📖 **Security Documentation:**
>
> - [SECURITY\_CERTIFICATE.md](SECURITY_CERTIFICATE.md) - Official A+ (9.8/10) security certificate
> - [SECURITY\_BEST\_PRACTICES.md](SECURITY_BEST_PRACTICES.md) - Complete deployment guide
> - [SECURITY.md](SECURITY.md) - Vulnerability reporting policy

Security best practices
-----------------------

[](#security-best-practices)

- Keep secrets and RSA keys in your vault/secret manager rather than source control.
- Pair short-lived access tokens (5–15 minutes) with refresh tokens that you rotate securely.
- Explicitly set `expectedIssuer` and `expectedAudience` for every consumer.
- Favor `HS512` or `RS256`; fallback only when compatibility demands it.
- Monitor `jwt.validateToken()` failures to detect tampering or clock skew issues.
- Log and alert on revocation decisions tied to `jti`.
- See the [security policy](SECURITY.md) for the preferred way to report vulnerabilities and what branches remain supported.

### Built-in security protections

[](#built-in-security-protections)

This library implements multiple layers of defense against common JWT attacks:

ProtectionImplementationPrevents**Algorithm whitelist**Only `HS256/384/512` and `RS256` allowed`alg=none` attacks**Strict algorithm matching**Header `alg` must match configured algorithmKey confusion attacks (HMAC/RSA mix)**Constant-time comparison**`hash_equals()` for HMAC signaturesTiming attacks**Token size limit**Max 8,192 bytesDenial of service**Clock skew protection**Configurable via `setClockSkew()` (max 60s)Replay attacks with clock manipulation**Token age validation**Tokens with `iat` older than 10 years rejectedLong-lived token abuse**Mandatory claims**`iss`/`aud` required when configuredInsufficient validation bypass**Base64url strict**Proper padding and validationEncoding manipulation#### Configuring clock skew safely

[](#configuring-clock-skew-safely)

```
// Padrão é 10 segundos, máximo permitido é 60 segundos
$jwt->setClockSkew(30); // Recomendado para produção
```

#### Token age limits

[](#token-age-limits)

Tokens with `iat` (issued-at) timestamps older than 10 years are automatically rejected to prevent abuse of long-lived tokens. This limit is enforced by the `MAX_TIMESTAMP_OFFSET` constant (315,360,000 seconds = 10 years).

```
// Example: Creating a token with iat validation
$payload = [
    'sub' => 'user-123',
    'iat' => time(), // Validated during createToken()
    'exp' => time() + 900,
];

$token = $jwt->createToken($payload);
```

```
expose_php=0
display_errors=0
log_errors=1
session.cookie_secure=1
session.cookie_httponly=1
open_basedir=/app:/tmp
```

JwToken
=======

[](#jwtoken-1)

JwToken is a PHP library for creating, signing and validating JSON Web Tokens (JWT) with support for:

- HMAC (HS256, HS384, HS512)
- RSA (RS256)
- Temporal claims (`exp`, `nbf`, `iat`) and contextual claims (`iss`, `aud`)
- `jti` (JWT ID) with optional integration for revocation

> **Important:** this library is designed for production use. Make sure to read the “Security best practices” section before integrating.

Installation
------------

[](#installation-1)

Via Composer:

```
composer require omegaalfa/jwtoken
```

Quick start (HS256)
-------------------

[](#quick-start-hs256)

The most common setup is HS256 with a secret stored in an environment variable:

```
use Omegaalfa\Jwtoken\JwToken;

$secret = getenv('JWT_SECRET');
if ($secret === false) {
    throw new RuntimeException('JWT_SECRET is not configured');
}

$jwt = new JwToken($secret, 'HS256');

$payload = [
    'sub' => 'user-123',
    'iss' => 'https://your-issuer.com',
    'aud' => 'your-api',
    'iat' => time(),
    'exp' => time() + 600, // 10 minutes
];

$token = $jwt->createToken($payload);

if ($jwt->validateToken($token)) {
    $decoded = $jwt->decodeToken($token);
    // use $decoded here
}
```

Requirements
------------

[](#requirements)

- PHP: **8.4+**
- Extension: **ext-openssl**

Concepts and features
---------------------

[](#concepts-and-features)

- **HMAC algorithms (HS256/384/512)** via `hash_hmac`, with internal mapping to `sha256`, `sha384`, `sha512`.
- **RS256** via `openssl_sign` / `openssl_verify`, using private/public key files.
- **Supported claims:**
    - `exp` – expiration time, validated automatically.
    - `nbf` – not-before, rejects tokens used before the configured time.
    - `iat` – issued-at, can be used with configurable clock skew.
    - `iss` – issuer, compared against `expectedIssuer`.
    - `aud` – audience, compared against `expectedAudience`.
    - `jti` – JWT ID, generated automatically if missing and used with `RevocationStoreInterface`.
- **Additional protections:**
    - Maximum token length limit.
    - Safe parsing (3 segments, strict Base64/JSON decoding).
    - Constant-time comparison for HMAC signatures via `hash_equals` (timing attack protection).

Basic usage with HMAC (HS256)
-----------------------------

[](#basic-usage-with-hmac-hs256)

```
use Omegaalfa\Jwtoken\JwToken;

$secret = getenv('JWT_SECRET');
if ($secret === false) {
    throw new RuntimeException('JWT_SECRET is not configured');
}

$jwt = new JwToken($secret, 'HS256');

// Optional: validation policy
$jwt->expectedIssuer = 'https://your-issuer.com';
$jwt->expectedAudience = 'your-api';

$payload = [
    'sub' => 'user-123',
    'name' => 'John Doe',
    'email' => 'john.doe@example.com',
    'iss' => 'https://your-issuer.com',
    'aud' => 'your-api',
    'iat' => time(),
    'exp' => time() + 3600,
];

$token = $jwt->createToken($payload);

// Validation
if ($jwt->validateToken($token)) {
    $decoded = $jwt->decodeToken($token);
    print_r($decoded);
}
```

HMAC key rotation with `setHmacKeys` and `kid`
----------------------------------------------

[](#hmac-key-rotation-with-sethmackeys-and-kid)

To make HMAC key rotation easier, you can register multiple secrets and use the `kid` header:

```
use Omegaalfa\Jwtoken\JwToken;

$fallbackSecret = getenv('JWT_SECRET'); // default secret

$jwt = new JwToken($fallbackSecret, 'HS256');

// Register multiple secrets identified by kid
$jwt->setHmacKeys([
    'v1' => 'old-secret',
    'v2' => 'current-secret',
]);

// When issuing new tokens, always use the kid of the current key
$payload = [
    'sub' => 'user-123',
    'iss' => 'https://your-issuer.com',
    'aud' => 'your-api',
];

$token = $jwt->createToken($payload, 60, ['kid' => 'v2']);

// On validation, the header is decoded, kid is read and the correct key is used automatically
$jwt->validateToken($token); // true if the signature is consistent
```

If the header does not contain `kid` or the `kid` is not found in `setHmacKeys`, the library falls back to the `secretKey` provided in the constructor.

Usage with RS256 (public/private key)
-------------------------------------

[](#usage-with-rs256-publicprivate-key)

```
use Omegaalfa\Jwtoken\JwToken;

$jwt = new JwToken(
    secretKey: 'not used for RS256',
    algorithm: 'RS256',
    pathPrivateKey: __DIR__ . '/keys/private.pem',
    pathPublicKey: __DIR__ . '/keys/public.pem',
);

$payload = [
    'sub' => 'user-123',
    'iss' => 'https://your-issuer.com',
    'aud' => 'your-api',
];

$token = $jwt->createToken($payload);

if ($jwt->validateToken($token)) {
    $decoded = $jwt->decodeToken($token);
}
```

Make sure your RSA keys have at least 2048 bits and are stored outside the public document root (e.g. `storage/keys` or a secure volume mounted in your container).

### RSA key rotation with `setRsaKeyPaths` and `kid`

[](#rsa-key-rotation-with-setrsakeypaths-and-kid)

Just like with HMAC, you can register multiple RSA key pairs and select which one to use via `kid`:

```
use Omegaalfa\Jwtoken\JwToken;

$jwt = new JwToken(
    secretKey: 'not used for RS256',
    algorithm: 'RS256',
    pathPrivateKey: __DIR__ . '/keys/private_default.pem',
    pathPublicKey: __DIR__ . '/keys/public_default.pem',
);

// Register specific paths for each kid
$jwt->setRsaKeyPaths(
    [
        'k1' => __DIR__ . '/keys/private_v1.pem',
        'k2' => __DIR__ . '/keys/private_v2.pem',
    ],
    [
        'k1' => __DIR__ . '/keys/public_v1.pem',
        'k2' => __DIR__ . '/keys/public_v2.pem',
    ],
);

$payload = [
    'sub' => 'user-123',
    'iss' => 'https://your-issuer.com',
    'aud' => 'your-api',
];

// Generate token signed with key pair v2
$token = $jwt->createToken($payload, 60, ['kid' => 'k2']);

// On validation, the header is read, kid is resolved and the correct public key is used
$jwt->validateToken($token); // true if the key pair and kid match
```

If the `kid` provided does not exist in `setRsaKeyPaths`, the library falls back to the default `pathPrivateKey`/`pathPublicKey`.

#### Practical RSA rotation strategy

[](#practical-rsa-rotation-strategy)

A common key rotation strategy:

1. **Introduce a new key**: generate a new key pair (`k2`) and configure it in `setRsaKeyPaths`, while keeping the old key (`k1`) for validation.
2. **Start signing with `k2`**: in all places that issue tokens, use `['kid' => 'k2']` in `createToken()`. Legacy tokens signed with `k1` remain valid because `k1` is still configured.
3. **Monitor `k1` usage**: use logs/telemetry to track when the volume of tokens using the old key becomes negligible.
4. **Decommission `k1`**: remove `k1` entries from `setRsaKeyPaths` (and/or update the default `pathPublicKey`) so that tokens signed with the old key are no longer accepted.

This flow allows for gradual rotation without locking out users, while keeping strict validation of `alg` and `kid`.

Revocation and `jti`
--------------------

[](#revocation-and-jti-1)

All generated tokens receive a `jti` (unique JWT ID) when the payload does not provide one:

- If you configure `revocationStore` with an implementation of `RevocationStoreInterface`, you can revoke specific tokens.

Simple in-memory example (for tests only):

```
use Omegaalfa\Jwtoken\RevocationStoreInterface;
use Omegaalfa\Jwtoken\JwToken;

class InMemoryRevocationStore implements RevocationStoreInterface
{
    public function __construct(private array $revoked = []) {}

    public function isRevoked(string $jti): bool
    {
        return in_array($jti, $this->revoked, true);
    }
}

$jwt = new JwToken('secret_key');
$jwt->revocationStore = new InMemoryRevocationStore(['compromised-jti']);
```

### ✅ Setter Methods (REQUIRED)

[](#-setter-methods-required)

```
// ✅ v3.0 (correct):
$jwt->setExpectedIssuer('https://auth.example.com');
$jwt->setExpectedAudience('example-api');
$jwt->setClockSkew(30); // max 60s (was 300s in v2.x)
```

### Other Breaking Changes

[](#other-breaking-changes)

1. **Clock Skew Maximum**: Reduced from 300s to 60s
2. **jti Validation**: Must be 16-128 characters (was any length)
3. **kid Format**: Must match `/^[a-zA-Z0-9_-]{1,64}$/` (was any string)
4. **Timestamp Validation**: `iat`, `nbf`, `exp` now validated during `createToken()`
5. **Error Messages**: Now generic to prevent information disclosure

### Migration Checklist

[](#migration-checklist)

- Replace all property assignments with setter methods
- Review clock skew values (max is now 60s)
- Validate kid format in existing tokens
- Ensure jti values are 16-128 characters
- Test temporal claims (iat, nbf, exp) are within 10-year limit
- Update error handling for generic validation messages

Recommended environment configuration (`php.ini`)
-------------------------------------------------

[](#recommended-environment-configuration-phpini)

```
expose_php=0
display_errors=0
log_errors=1
session.cookie_secure=1
session.cookie_httponly=1
open_basedir=/app:/tmp
```

###  Health Score

37

—

LowBetter than 83% of packages

Maintenance76

Regular maintenance activity

Popularity4

Limited adoption so far

Community9

Small or concentrated contributor base

Maturity53

Maturing project, gaining track record

 Bus Factor1

Top contributor holds 90% 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 ~5 days

Total

2

Last Release

131d ago

### Community

Maintainers

![](https://www.gravatar.com/avatar/c1e2c50245fb4a2677af1ae8acfd1105cd2e1c311951f4de4390bf05505c3053?d=identicon)[omegaalfa](/maintainers/omegaalfa)

---

Top Contributors

[![omegaalfa](https://avatars.githubusercontent.com/u/16062691?v=4)](https://github.com/omegaalfa "omegaalfa (45 commits)")[![dependabot[bot]](https://avatars.githubusercontent.com/in/29110?v=4)](https://github.com/dependabot[bot] "dependabot[bot] (5 commits)")

---

Tags

jwtsecurityAuthenticationJSON Web Tokenphp8jwt.ioHS256hs384hs512rs256

###  Code Quality

TestsPHPUnit

Static AnalysisPHPStan

Type Coverage Yes

### Embed Badge

![Health badge](/badges/omegaalfa-jwtoken/health.svg)

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

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