How do I access s3 bucket from IAM account using Java - amazon-s3

Question

I have an s3 account with AmazonS3FullAccess put when I try to use it to run s3.listObjects("name") I get a 403 error...
<?xml version="1.0" encoding="UTF-8"?>
<Error><Code>AccessDenied</Code><Message>Access Denied</Message><RequestId>59C510407179770D</RequestId><HostId>aLPzqYkTKx6nkUWVtZWYS+2fYexzniKWkn2D9+aG6pdxBAjtxAcC85uvGC4HqDnQIifLaf+oy1E=</HostId></Error>
s3.doesBucketExistV2("name") returns true.
My policy looks like this...
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": "s3:*",
"Resource": "*"
}
]
}
Do I need to add the user somewhere?
Update
Looks like it could be a problem with not getting the AWS creds (which is weird becuase of this line)...
Deprecated. By doesBucketExistV2(String) which will correctly throw an exception when credentials are invalid instead of returning true. See Issue #1256.
If I run ((AmazonS3Client) s3).awsCredentialsProvider.getCredentials() it returns null. My creds are in a amazon.properties file like this...
#PropertySources({
#PropertySource("classpath:amazon.properties")
})
// amazon.properties
amazon.accessKey=${AMZN_ACCESS_KEY}
amazon.secretKey=${AMZN_SECRET_KEY}
aws.accessKeyId=${AMZN_ACCESS_KEY}
aws.secretKey=${AMZN_SECRET_KEY}
and echo $AMZN_ACCESS_KEY returns the value I would expect.
Update 2
It appears to be something with the properties not getting read properly if I am explicit like this...
BasicAWSCredentials awsCreds = new BasicAWSCredentials(key, secret);
final AmazonS3 s3 = AmazonS3ClientBuilder.standard()
.withCredentials(new AWSStaticCredentialsProvider(awsCreds))
.withRegion(service.getRegion())
.build();
It worked, so 2 questions 1.) Why does the doesBucketExistV2 return true even when I am not logged in properly 2.) Why are the system properties not working?

Answer 1

You need to pass bucket name as below. The sample code should be as below
Refer here.
/* The following example list two objects in a bucket. */
var params = {
Bucket: "name",
MaxKeys: 2
};
s3.listObjects(params, function(err, data) {
if (err) console.log(err, err.stack); // an error occurred
else console.log(data); // successful response