AWS S3 access denied when getting image by url - php

Question

I am working on AWS EC2 Ubuntu Machine and trying to fetch image from AWS S3 but following error has been shown to me every time.
<Error>
<Code>InvalidArgument</Code>
<Message>
Requests specifying Server Side Encryption with AWS KMS managed keys require AWS Signature Version 4.
</Message>
<ArgumentName>Authorization</ArgumentName>
<ArgumentValue>null</ArgumentValue>
<RequestId>7C8B4BF1CE2FDC9E</RequestId>
<HostId>
/L5kjuOET4XFgGter2eFHX+aRSvVm/7VVmIBqQE/oMLeQZ1ditSMZuHPOlsMaKi8hYRnGilTqZY=
</HostId>
</Error>
Here is my bucket policy
{
"Version": "2012-10-17",
"Id": "Policy1441213815928",
"Statement": [
{
"Sid": "Stmt1441213813464",
"Effect": "Allow",
"Principal": "*",
"Action": "s3:GetObject",
"Resource": "arn:aws:s3:::mytest.sample/*"
}
]
}
Here is the code
require 'aws-autoloader.php';
$credentials = new Aws\Credentials\Credentials('key', 'key');
$bucketName = "mytest.sample";
$s3 = new Aws\S3\S3Client([
'signature' => 'v4',
'version' => 'latest',
'region' => 'ap-southeast-1',
'credentials' => $credentials,
'http' => [
'verify' => '/home/ubuntu/cacert.pem'
],
'Statement' => [
'Action ' => "*",
],
]);
$result = $s3->getObject(array(
'Bucket' => $bucketName,
'Key' => 'about_us.jpg',
));
Html
<img src="<?php echo $result['#metadata']['effectiveUri']; ?>" />
Edit for Michael - sqlbot : here I am using default KMS.
try {
$result = $this->Amazon->S3->putObject(array(
'Bucket' => 'mytest.sample',
'ACL' => 'authenticated-read',
'Key' => $newfilename,
'ServerSideEncryption' => 'aws:kms',
'SourceFile' => $filepath,
'ContentType' => mime_content_type($filepath),
'debug' => [
'logfn' => function ($msg) {
echo $msg . "\n";
},
'stream_size' => 0,
'scrub_auth' => true,
'http' => true,
],
));
} catch (S3Exception $e) {
echo $e->getMessage() . "\n";
}
let me know if you need more.

Answer 1

PHP sdk v2
the Credentials package is Aws\Common\Credentials
to create an S3Client you need a factory
Try something like this
use Aws\S3\S3Client;
use Aws\Common\Credentials\Credentials;
$credentials = new Credentials('YOUR_ACCESS_KEY', 'YOUR_SECRET_KEY');
// Instantiate the S3 client with your AWS credentials
$s3Client = S3Client::factory(array(
'signature' => 'v4',
'region' => 'ap-southeast-1',
'credentials' => $credentials,
.....
]);
)
If that does not work you might try to declare explicitly a SignatureV4 object
use Aws\S3\S3Client;
use Aws\Common\Credentials\Credentials;
use Aws\Common\Signature\SignatureV4;
$credentials = new Credentials('YOUR_ACCESS_KEY', 'YOUR_SECRET_KEY');
// Instantiate the S3 client with your AWS credentials
$s3Client = S3Client::factory(array(
'signature' => new SignatureV4(),
'region' => 'ap-southeast-1',
'credentials' => $credentials,
.....
]);
)
In case you upgrade to sdk v3
You need to have signature_version (instead of signature) as parameter when you declare your s3 client
Statement does not appear to be a valid parameter (http://docs.aws.amazon.com/aws-sdk-php/v3/guide/guide/configuration.html#signature-version)
if issue you can turn on debug param to get more output
This would look like this
$s3 = new Aws\S3\S3Client([
'signature_version' => 'v4',
'version' => 'latest',
'region' => 'ap-southeast-1',
'credentials' => $credentials,
'http' => [
'verify' => '/home/ubuntu/cacert.pem'
],
'debug' => true
]);
see here for the full list of available parameter

Answer 2

I have also face this issue with aws:kms encyrption key, I suggest that if you wanted to use kms key then you have to create your kms key in IAM section of AWS Console. I love to recommended AES256 server side encryption, here S3 automatically Encrypted your data while putting and decryption while getting object. Please go through below link:
S3 Server Side encryption with AES256
My Solution is change this line 'ServerSideEncryption' => 'aws:kms' with 'ServerSideEncryption' => 'AES256'
try {
$result = $this->Amazon->S3->putObject(array(
'Bucket' => 'mytest.sample',
'ACL' => 'authenticated-read',
'Key' => $newfilename,
'ServerSideEncryption' => 'AES256',
'SourceFile' => $filepath,
'ContentType' => mime_content_type($filepath),
'debug' => [
'logfn' => function ($msg) {
echo $msg . "\n";
},
'stream_size' => 0,
'scrub_auth' => true,
'http' => true,
],
));
} catch (S3Exception $e) {
echo $e->getMessage() . "\n";
}
Please also update your bucket policy with below json, it will prevent you to upload object with out AES256 encryption
{
"Sid": "DenyUnEncryptedObjectUploads",
"Effect": "Deny",
"Principal": "*",
"Action": "s3:PutObject",
"Resource": "arn:aws:s3:::yourbucketname/*",
"Condition": {
"StringNotEquals": {
"s3:x-amz-server-side-encryption": "AES256"
}
}
}