# media-cloud-sync/1.2.4/includes/sdk/s3/Aws/Signature/S3SignatureV4.php

Media Cloud Sync, version 1.2.4. 69 lines.

- Page: https://pluginprobe.com/plugins/media-cloud-sync/1.2.4/code/includes/sdk/s3/Aws/Signature/S3SignatureV4.php
- Raw: https://pluginprobe.com/plugins/media-cloud-sync/1.2.4/raw/includes/sdk/s3/Aws/Signature/S3SignatureV4.php
- Modified: 2024-10-27T10:40:38+00:00

Line numbers below start at 1. Link to a line or a range by appending a fragment to the
page URL, for example `https://pluginprobe.com/plugins/media-cloud-sync/1.2.4/code/includes/sdk/s3/Aws/Signature/S3SignatureV4.php#L10-L20`.

```php
<?php

namespace Dudlewebs\WPMCS\s3\Aws\Signature;

use Dudlewebs\WPMCS\s3\Aws\Credentials\CredentialsInterface;
use Dudlewebs\WPMCS\s3\Psr\Http\Message\RequestInterface;
/**
 * Amazon S3 signature version 4 support.
 */
class S3SignatureV4 extends SignatureV4
{
    /**
     * S3-specific signing logic
     *
     * {@inheritdoc}
     */
    use SignatureTrait;
    public function signRequest(RequestInterface $request, CredentialsInterface $credentials, $signingService = null)
    {
        // Always add a x-amz-content-sha-256 for data integrity
        if (!$request->hasHeader('x-amz-content-sha256')) {
            $request = $request->withHeader('x-amz-content-sha256', $this->getPayload($request));
        }
        $useCrt = \strpos($request->getUri()->getHost(), "accesspoint.s3-global") !== \false;
        if (!$useCrt) {
            if (\strpos($request->getUri()->getHost(), "s3-object-lambda")) {
                return parent::signRequest($request, $credentials, "s3-object-lambda");
            }
            return parent::signRequest($request, $credentials);
        }
        $signingService = $signingService ?: 's3';
        return $this->signWithV4a($credentials, $request, $signingService);
    }
    /**
     * Always add a x-amz-content-sha-256 for data integrity.
     *
     * {@inheritdoc}
     */
    public function presign(RequestInterface $request, CredentialsInterface $credentials, $expires, array $options = [])
    {
        if (!$request->hasHeader('x-amz-content-sha256')) {
            $request = $request->withHeader('X-Amz-Content-Sha256', $this->getPresignedPayload($request));
        }
        if (\strpos($request->getUri()->getHost(), "accesspoint.s3-global")) {
            $request = $request->withHeader("x-amz-region-set", "*");
        }
        return parent::presign($request, $credentials, $expires, $options);
    }
    /**
     * Override used to allow pre-signed URLs to be created for an
     * in-determinate request payload.
     */
    protected function getPresignedPayload(RequestInterface $request)
    {
        return SignatureV4::UNSIGNED_PAYLOAD;
    }
    /**
     * Amazon S3 does not double-encode the path component in the canonical request
     */
    protected function createCanonicalizedPath($path)
    {
        // Only remove one slash in case of keys that have a preceding slash
        if (\substr($path, 0, 1) === '/') {
            $path = \substr($path, 1);
        }
        return '/' . $path;
    }
}

```