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<?php |
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namespace Acquia\Hmac; |
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use Acquia\Hmac\Digest\Digest; |
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use Acquia\Hmac\Digest\DigestInterface; |
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use Psr\Http\Message\RequestInterface; |
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use Psr\Http\Message\ResponseInterface; |
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/** |
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* Signs responses according to the HTTP HMAC spec. |
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*/ |
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class ResponseSigner |
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{ |
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/** |
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* @var \Acquia\Hmac\KeyInterface |
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* The key with which to sign the response. |
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*/ |
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protected $key; |
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/** |
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* @var \Psr\Http\Message\RequestInterface |
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* The original response corresponding to the response being signed. |
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*/ |
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protected $request; |
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/** |
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* @var \Acquia\Hmac\Digest\DigestInterface |
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* The digest with which to sign the response. |
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*/ |
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protected $digest; |
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/** |
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* Initializes the response signer with a key and request. |
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* |
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* @param \Acquia\Hmac\KeyInterface $key |
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* The key with which to sign the response. |
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* @param \Psr\Http\Message\RequestInterface $request |
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* The original response corresponding to the response being signed. |
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* @param \Acquia\Hmac\Digest\Digest $digest |
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* The digest with which to sign the response. Defaults to |
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* \Acquia\Hmac\Digest\Digest. |
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*/ |
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public function __construct(KeyInterface $key, RequestInterface $request, DigestInterface $digest = null) |
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{ |
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$this->key = $key; |
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$this->request = $request; |
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$this->digest = $digest ?: new Digest(); |
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} |
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/** |
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* {@inheritDoc} |
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*/ |
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public function signResponse(ResponseInterface $response) |
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{ |
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$authHeader = AuthorizationHeader::createFromRequest($this->request); |
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$parts = [ |
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$authHeader->getNonce(), |
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$this->request->getHeaderLine('X-Authorization-Timestamp'), |
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(string) $response->getBody(), |
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]; |
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$response->getBody()->rewind(); |
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$message = implode("\n", $parts); |
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$signature = $this->digest->sign($message, $this->key->getSecret()); |
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/** @var \Psr\Http\Message\ResponseInterface $response */ |
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$response = $response->withHeader('X-Server-Authorization-HMAC-SHA256', $signature); |
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return $response; |
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} |
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} |
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acquia /
http-hmac-php
