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<?php |
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|
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namespace IvyForms\Services\Integrations; |
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|
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/** |
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* Signs outbound requests from WordPress to ivyforms-middleware. |
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* |
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* Canonical HMAC matches MiddlewareAuthService: timestamp, nonce, method, path, body. |
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*/ |
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class MiddlewareRequestAuthService |
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{ |
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public function signRequestBody(string $body): string |
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{ |
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$secret = $this->sharedSecret(); |
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if ($secret === '') { |
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return ''; |
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} |
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|
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return hash_hmac('sha256', $body, $secret); |
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} |
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|
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/** |
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* @return array<string, string> |
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*/ |
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public function buildSignedHeaders(string $body, string $url = '', string $method = 'POST'): array |
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{ |
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$secret = $this->sharedSecret(); |
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$path = $this->requestPath($url); |
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if ($secret === '' || $path === '') { |
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return ['Content-Type' => 'application/json']; |
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} |
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|
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$timestamp = (string) time(); |
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$nonce = wp_generate_password(32, false, false); |
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$canonicalRequest = implode( |
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"\n", |
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[ |
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$timestamp, |
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$nonce, |
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strtoupper($method), |
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$path, |
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$body, |
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] |
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); |
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|
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return [ |
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'Content-Type' => 'application/json', |
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'X-IvyForms-Signature' => hash_hmac('sha256', $canonicalRequest, $secret), |
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'X-IvyForms-Timestamp' => $timestamp, |
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'X-IvyForms-Nonce' => $nonce, |
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]; |
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} |
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|
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private function sharedSecret(): string |
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{ |
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return defined('IVYFORMS_MIDDLEWARE_SHARED_SECRET') |
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? trim((string) IVYFORMS_MIDDLEWARE_SHARED_SECRET) |
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: ''; |
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} |
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|
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private function requestPath(string $url): string |
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{ |
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$path = parse_url($url, PHP_URL_PATH); |
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|
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return is_string($path) && $path !== '' ? $path : ''; |
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} |
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} |
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|
