Error when trying to list objects from a public S3 bucket via the listObjectsV2() function.

[KingMSM]

Describe the bug

So I have a public bucket which can directly be access by a link (can see the data if I copy paste that link on the browser).

However, when I try access the bucket via aws-sdk-php (v3.305.1) library it gives me the error:

"The authorization header is malformed; a non-empty Access Key (AKID) must be provided in the credential."

This is the code I have written to access the objects of my public bucket:

  $s3Client = new S3Client([
     "version" => "latest"
     "region" => "us-east-1"
     "credentials" => false // since its a public bucket
  ]);
  
  $data = $s3Client->listObjectsV2([
     "bucket" => "my bucket name"
  ]);

As per the AWS Documentation it says this is how to access via anonymous clients using the code above.

As a matter of fact this happens with any of the S3 functions (getObject, putObject, deleteObject, etc) that I use when I put [credentials => false]

Expected Behavior

Expected behavior is to list the objects of the S3 bucket.

Current Behavior

The following exception is thrown:

Aws\S3\Exception\S3Exception: Error executing "ListObjectsV2" on "public_bucket_url"; AWS HTTP error: Client error: GET public_bucket_url resulted in a 400 Bad Request response:

AuthorizationHeaderMalformedThe authorization header (truncated...)
AuthorizationHeaderMalformed (client): The authorization header is malformed; a non-empty Access Key (AKID) must be provided in the credential. -
AuthorizationHeaderMalformedThe authorization header is malformed; a non-empty Access Key (AKID) must be provided in the credential.F3MPEAGWS7NYARRD3J5SLAxac8koK4F5lhwBV9aj/aBLBGtDcH2wWfOfYyRoqG3EWFhfne9I0Spk2OBz2ruYqY/YzMU=

Caused by
GuzzleHttp\Exception\ClientException: Client error: GET public_bucket_url resulted in a 400 Bad Request response:

AuthorizationHeaderMalformedThe authorization header (truncated...)

/var/www/html/vendor/guzzlehttp/guzzle/src/Exception/RequestException.php:113
/var/www/html/vendor/guzzlehttp/guzzle/src/Middleware.php:69
/var/www/html/vendor/guzzlehttp/promises/src/Promise.php:204
/var/www/html/vendor/guzzlehttp/promises/src/Promise.php:153
/var/www/html/vendor/guzzlehttp/promises/src/TaskQueue.php:48
/var/www/html/vendor/guzzlehttp/guzzle/src/Handler/CurlMultiHandler.php:159
/var/www/html/vendor/guzzlehttp/guzzle/src/Handler/CurlMultiHandler.php:184
/var/www/html/vendor/guzzlehttp/promises/src/Promise.php:248
/var/www/html/vendor/guzzlehttp/promises/src/Promise.php:224
/var/www/html/vendor/guzzlehttp/promises/src/Promise.php:269
/var/www/html/vendor/guzzlehttp/promises/src/Promise.php:226
/var/www/html/vendor/guzzlehttp/promises/src/Promise.php:269
/var/www/html/vendor/guzzlehttp/promises/src/Promise.php:226
/var/www/html/vendor/guzzlehttp/promises/src/Promise.php:62
/var/www/html/vendor/aws/aws-sdk-php/src/AwsClientTrait.php:58
/var/www/html/vendor/aws/aws-sdk-php/src/AwsClientTrait.php:86

Reproduction Steps

• Create an S3 client.
• Try to list the objects of a public bucket with all public access via the listObjectV2 function.

  $s3Client = new S3Client([
     "version" => "latest"
     "region" => "us-east-1"
     "credentials" => false // since its a public bucket
  ]);
  
  $data = $s3Client->listObjectsV2([
     "bucket" => "my bucket name"
  ]);

Possible Solution

No response

Additional Information/Context

No response

SDK version used

v3.305.1

Environment details (Version of PHP (php -v)? OS name and version, etc.)

PHP 8.1, Windows 10, Docker

[github-actions]

This issue is now closed. Comments on closed issues are hard for our team to see.
If you need more assistance, please open a new issue that references this one.

[stobrien89]

Hi @KingMSM ,

Sorry to hear about the issues. It turns out our endpoint resolution was overriding these requests and forcing them to use SIgV4. The fix will be available in today's release.