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<?php |
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namespace Rezzza\SecurityBundle\Security\Firewall; |
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class SignedRequest |
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{ |
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private $method; |
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private $host; |
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private $pathInfo; |
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private $content; |
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private $signatureTime; |
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public function __construct($method, $host, $pathInfo, $content, $signatureTime = null) |
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{ |
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$this->setMethod(strtoupper($method)); |
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$this->signatureTime = $signatureTime; |
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$this->host = $host; |
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$this->pathInfo = $pathInfo; |
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$this->content = $content; |
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} |
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public function buildSignature(SignatureConfig $signatureConfig) |
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{ |
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$payload = array( |
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$this->method, |
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$this->host, |
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$this->pathInfo, |
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$this->content |
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); |
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if ($signatureConfig->isReplayProtectionEnabled()) { |
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$this->guardValidSignatureTime(); |
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// use unshift to keep BC on signature generation |
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array_unshift($payload, $this->signatureTime); |
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} |
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return hash_hmac( |
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$signatureConfig->getAlgorithm(), |
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implode("\n", $payload), |
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$signatureConfig->getSecret() |
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); |
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} |
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public function authenticateSignature($signature, SignatureConfig $signatureConfig, ReplayProtection $replayProtection) |
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{ |
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if ($signature !== $this->buildSignature($signatureConfig)) { |
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throw new InvalidSignatureException; |
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} |
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if (!$replayProtection->accept($this->signatureTime, time())) { |
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throw new ExpiredSignatureException('Signature has expired'); |
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} |
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return true; |
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} |
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private function guardValidSignatureTime() |
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{ |
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if (!is_numeric($this->signatureTime)) { |
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throw new InvalidSignatureException( |
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sprintf('Signed request accepts only numeric value for "signatureTime" attribute. "%s" given', $this->signatureTime) |
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); |
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} |
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} |
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private function setMethod($method) |
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{ |
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$httpVerbs = array('POST', 'GET', 'PUT', 'PATCH', 'LINK'); |
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if (!in_array($method, $httpVerbs)) { |
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throw new InvalidSignatureException( |
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sprintf('Signed request accepts only valid http method for "method" attribute. "%s" given', $method) |
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); |
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} |
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$this->method = $method; |
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} |
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} |
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rezzza /
SecurityBundle
