aws lambda function getting access denied when getObject from s3

Question

I am getting an acccess denied error from S3 AWS service on my Lambda function.

This is the code:

// dependencies
var async = require(\'async\');
var         


        

Answer 1

I was struggling with this issue for hours. I was using AmazonS3EncryptionClient and nothing I did helped. Then I noticed that the client is actually deprecated, so I thought I'd try switching to the builder model they have:

var builder = AmazonS3EncryptionClientBuilder.standard()
  .withEncryptionMaterials(new StaticEncryptionMaterialsProvider(encryptionMaterials))
if (accessKey.nonEmpty && secretKey.nonEmpty) builder = builder.withCredentials(new AWSStaticCredentialsProvider(new BasicAWSCredentials(accessKey.get, secretKey.get)))
builder.build()

And... that solved it. Looks like Lambda has trouble injecting the credentials in the old model, but works well in the new one.