SDK working with master credentials but not with IAM

[cizal]

Maybe this is not something that I need to report as an issue, but I went through the documentation and online resources and wasn't able to find anything that would make this work.
When using the master key/secret everything works. However, when using the IAM key/secret I constantly receive

AWS Error Code: SignatureDoesNotMatch, Status Code: 403, AWS Request ID: 4753C8291E073CE9, AWS Error Type: client, AWS Error Message: The request signature we calculated does not match the signature you provided. Check your key and signing method.

Here is my IAM policy:

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "Stmt1427650841800",
      "Action": "s3:*",
      "Effect": "Allow",
      "Resource": "arn:aws:s3:::BUCKETNAME/*"
    }
  ]
}

This is the bucket policy:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "Stmt1427647391802",
            "Effect": "Allow",
            "Principal": {
                "AWS": "arn:aws:iam::AWS_ACOUNT_ID:user/IAM_USERNAME"
            },
            "Action": "s3:*",
            "Resource": "arn:aws:s3:::BUCKETNAME/*"
        }
    ]
}

I even removed the policies so that the user can have full permissions on all of the buckets but I still receive the same error.

Here is a sample request/response:

# Request:
PUT /testfile.txt HTTP/1.1
Host: esquireprod.s3-us-west-2.amazonaws.com
x-amz-acl: public-read
Content-Type: text/plain
Content-MD5: 2UY2sCtfw4i/iNjVn28myA==
User-Agent: aws-sdk-php2/2.7.24 Guzzle/3.9.3 curl/7.22.0 PHP/5.5.20-1+deb.sury.org~precise+1 Laravel/4.2.17 L4MOD/1.1.0
Date: Mon, 30 Mar 2015 00:31:31 +0000
Authorization: AWS AKIAIM43ZC4YWNBD6S6A:m6uzQ+odmuKmtE8D8TIbKI3LNQE=
Content-Length: 32

Some test content in the file...

# Response:
HTTP/1.1 403 Forbidden
x-amz-request-id: 87AA985EC92E6EB0
x-amz-id-2: pYVZpGy10y52KmNewF4sSZYDkB5Uem8GNx1qRee/gwF2TqVcL131i9yDaa/2VSEsV/GfgfOGRys=
Content-Type: application/xml
Transfer-Encoding: chunked
Date: Mon, 30 Mar 2015 00:31:31 GMT
Connection: close
Server: AmazonS3

<?xml version="1.0" encoding="UTF-8"?>
<Error><Code>SignatureDoesNotMatch</Code><Message>The request signature we calculated does not match the signature you provided. Check your key and signing method.</Message><AWSAccessKeyId>AKIAIM43ZC4YWNBD6S6A</AWSAccessKeyId><StringToSign>PUT
2UY2sCtfw4i/iNjVn28myA==
text/plain
Mon, 30 Mar 2015 00:31:31 +0000
x-amz-acl:public-read
/esquireprod/testfile.txt</StringToSign><SignatureProvided>m6uzQ+odmuKmtE8D8TIbKI3LNQE=</SignatureProvided><StringToSignBytes>50 55 54 0a 32 55 59 32 73 43 74 66 77 34 69 2f 69 4e 6a 56 6e 32 38 6d 79 41 3d 3d 0a 74 65 78 74 2f 70 6c 61 69 6e 0a 4d 6f 6e 2c 20 33 30 20 4d 61 72 20 32 30 31 35 20 30 30 3a 33 31 3a 33 31 20 2b 30 30 30 30 0a 78 2d 61 6d 7a 2d 61 63 6c 3a 70 75 62 6c 69 63 2d 72 65 61 64 0a 2f 65 73 71 75 69 72 65 70 72 6f 64 2f 74 65 73 74 66 69 6c 65 2e 74 78 74</StringToSignBytes><RequestId>87AA985EC92E6EB0</RequestId><HostId>pYVZpGy10y52KmNewF4sSZYDkB5Uem8GNx1qRee/gwF2TqVcL131i9yDaa/2VSEsV/GfgfOGRys=</HostId></Error>```

I'm using the AWS Service Provider for Laravel 4, here is the sample code(basic putObject call):
```php
$s3 = AWS::get('s3');
$file = public_path('assets/original/testfile.txt');
$s3->addSubscriber(\Guzzle\Plugin\Log\LogPlugin::getDebugPlugin());
$result = $s3->putObject(array(
               'Bucket'     => 'esquireprod',
               'Key'        => 'testfile.txt',
               'SourceFile' => $file,
               'ACL'    => 'public-read'
               ));

[cizal]

After further research I located the problem to the AWS Service Provider for Laravel 4 and opened the issue there: aws/aws-sdk-php-laravel#66.

[jeremeamia]

I'll address it there.