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Informations about the package webhook-signature

PHP Webhook Signature

Tests Latest Version on Packagist Last updated

Minimal, framework-agnostic HMAC-SHA256 webhook signature generation and verification with replay attack prevention.

Requirements

Installation

Usage

Sender Side — Signing an Outgoing Payload

Receiver Side — Verifying an Incoming Webhook

Replay Attack Prevention

By default, signatures older than 300 seconds (5 minutes) are rejected. Adjust the tolerance for your use case:

Exception-Based Flow with verifyOrFail()

Key Rotation with Multiple Secrets

When rotating webhook secrets, both the old and new secrets can be accepted during the transition period:

Algorithm-Specific Signing

Use signWith() and verifyWith() to sign and verify with SHA-384 or SHA-512 instead of the default SHA-256:

API

Method Description
WebhookSignature::generate(string $payload, string $secret, ?int $timestamp = null): string Sign a payload; returns the formatted t={ts},v1={hmac} header value
WebhookSignature::verify(string $payload, string $signature, string $secret, int $tolerance = 300): bool Verify a signature; returns false if malformed, expired, or invalid
WebhookSignature::verifyOrFail(string $payload, string $signature, string $secret, int $tolerance = 300): void Verify a signature; throws InvalidSignatureException or SignatureExpiredException on failure
WebhookSignature::signWith(string $payload, string $secret, SignatureAlgorithm $algorithm, ?int $timestamp = null): string Sign a payload using a specific algorithm (SHA-256, SHA-384, or SHA-512)
WebhookSignature::verifyWith(string $payload, string $signature, string $secret, SignatureAlgorithm $algorithm, int $tolerance = 300): bool Verify a signature using a specific algorithm
WebhookSignature::verifyWithMultipleSecrets(string $payload, string $signature, array $secrets, int $tolerance = 300): bool Verify against multiple secrets; returns true if any matches (key rotation)
WebhookSignature::parseSignatureHeader(string $signature): ?array Parse a signature header into ['timestamp' => int, 'v1' => string]; returns null on malformed input

Development

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License

MIT

All versions of webhook-signature with dependencies

PHP Build Version
Package Version
Requires php Version ^8.2
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