<?php
namespace Aws\Signature;
use Aws\Credentials\CredentialsInterface;
use Psr\Http\Message\RequestInterface;
/**
* Amazon S3 signature version 4 support.
*/
class S3SignatureV4 extends SignatureV4
{
/**
* Always add a x-amz-content-sha-256 for data integrity.
*/
public function signRequest(
RequestInterface $request,
CredentialsInterface $credentials
) {
if (!$request->hasHeader('x-amz-content-sha256')) {
$request = $request->withHeader(
'X-Amz-Content-Sha256',
$this->getPayload($request)
);
}
return parent::signRequest($request, $credentials);
}
/**
* Override used to allow pre-signed URLs to be created for an
* in-determinate request payload.
*/
protected function getPresignedPayload(RequestInterface $request)
{
return 'UNSIGNED-PAYLOAD';
}
/**
* Amazon S3 does not double-encode the path component in the canonical request
*/
protected function createCanonicalizedPath($path)
{
return '/' . ltrim($path, '/');
}
}
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