DigitalOcean Spaces - File Upload Using Curl

August 9, 2019 144 views
PHP

Hi!

I'm trying to upload some files to DigitalOcean's Spaces with PHP and cURL but for some reason I cannot do it. I don't want to use some libraries like Amazon's SDK because they are too big. I want something more simple. Here is where I am at now.

 $file = '/home/development/www/source.png';

    $contents = file_get_contents($file);
    $filesize = filesize($file);

    $accessKeyId = '###';
    $secretKey = '###';

    $longDate = gmdate('Ymd\THis\Z');
    $shortDate = gmdate('Ymd');

    $newfile = urlencode('/new-dir/new-file.png');

    $cannonical = 'PUT'.PHP_EOL.''.$newfile.''.PHP_EOL.''.PHP_EOL.'content-length:'.$filesize.''.PHP_EOL.'host:fra1.digitaloceanspaces.com'.PHP_EOL.'x-amz-date:'.$longDate.''.PHP_EOL.'x-amz-acl:public-read'.PHP_EOL.'content-length;host;x-amz-date;x-amz-acl;'.PHP_EOL.''.hash_file('sha256', $file).''.PHP_EOL.'';

    $cannonical = hash('sha256', $cannonical);

    $string = 'AWS4-HMAC-SHA256'.PHP_EOL.''.$longDate.''.PHP_EOL.''.$shortDate.'/fra1/s3/aws4_request'.PHP_EOL.''.$cannonical.''.PHP_EOL.'';

    $signingKey = hash_hmac('sha256', $shortDate, 'AWS4'.$secretKey, true);
    $signingKey = hash_hmac('sha256', 'fra1', $signingKey, true);
    $signingKey = hash_hmac('sha256', 's3', $signingKey, true);
    $signingKey = hash_hmac('sha256', 'aws4_request', $signingKey, true);
    $signature  = hash_hmac('sha256', $signingKey.$string, $signingKey);


    $ch = curl_init();
    curl_setopt($ch, CURLOPT_HEADER, true);
    curl_setopt($ch, CURLOPT_URL, 'https://bucket.fra1.digitaloceanspaces.com/'.$newfile);
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
            'Content-Length: '.$filesize,
            'Host: bucket.fra1.digitaloceanspaces.com',
            'x-amz-date: '.$longDate,
            'x-amz-acl: public-read',
            'Authorization: AWS4-HMAC-SHA256 Credential='.$accessKeyId.'/'.$longDate.'/fra1/s3/aws4_request, SignedHeaders=host;x-amz-date;x-amz-acl;content-length, Signature='.$signature
    ]);

    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'PUT');
    curl_setopt($ch, CURLOPT_POSTFIELDS, $contents);
    curl_exec($ch);
    echo curl_error($ch);
    $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    echo $http_code;

Every time I try to upload something it says 403 Forbidden. What am I doing wrong in the signature calculation?

Thank you.

1 Answer

Hey!

I'm not sure what's missing in your code here. We do have similar case discussed earlier in community link below which might help you to upload files using PHP:
https://www.digitalocean.com/community/questions/how-to-use-digitalocean-spaces-with-the-aws-s3-sdks?answer=39594

If you are still getting an error then I would highly recommend you to open a support ticket along with the error message so that our support team looks into it.

-Dikshith

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