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pixelfed/app/Util/HTTPSignatures/Signer.php

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2018-11-19 03:33:10 +00:00
<?php
namespace App\Util\HttpSignatures;
use Psr\Http\Message\RequestInterface;
class Signer
{
/** @var Key */
private $key;
/** @var HmacAlgorithm */
private $algorithm;
/** @var HeaderList */
private $headerList;
/**
* @param Key $key
* @param HmacAlgorithm $algorithm
* @param HeaderList $headerList
*/
public function __construct($key, $algorithm, $headerList)
{
$this->key = $key;
$this->algorithm = $algorithm;
$this->headerList = $headerList;
}
/**
* @param RequestInterface $message
*
* @return RequestInterface
*/
public function sign($message)
{
$signatureParameters = $this->signatureParameters($message);
$message = $message->withAddedHeader('Signature', $signatureParameters->string());
$message = $message->withAddedHeader('Authorization', 'Signature '.$signatureParameters->string());
return $message;
}
/**
* @param RequestInterface $message
*
* @return RequestInterface
*/
public function signWithDigest($message)
{
$message = $this->addDigest($message);
return $this->sign($message);
}
/**
* @param RequestInterface $message
*
* @return RequestInterface
*/
private function addDigest($message)
{
if (!array_search('digest', $this->headerList->names)) {
$this->headerList->names[] = 'digest';
}
$message = $message->withoutHeader('Digest')
->withHeader(
'Digest',
'SHA-256='.base64_encode(hash('sha256', $message->getBody(), true))
);
return $message;
}
/**
* @param RequestInterface $message
*
* @return SignatureParameters
*/
private function signatureParameters($message)
{
return new SignatureParameters(
$this->key,
$this->algorithm,
$this->headerList,
$this->signature($message)
);
}
/**
* @param RequestInterface $message
*
* @return Signature
*/
private function signature($message)
{
return new Signature(
$message,
$this->key,
$this->algorithm,
$this->headerList
);
}
}