CODEWITHSUNDEEP
amazon-s3aws-sdk
11thdimension
11thdimension

Reputation: 10653

AWS java SDK manually set signature version

I'm trying to access a blob store service which is on top of AWS S3. It supports AWS SDK and it's signature version 2.

I'm using code here to access the this service.

Is it possible to manually set the signature version of the request made by AWS SDK ?

According to this page

AWS currently supports two signature versions: signature version 2 and signature version 4, which are covered in this section. Most services support version 4, and if a service supports version 4, we strongly recommend that you use that version.

I'm unable to find how to set the signature version to 2 or 4 manually.

Upvotes: 7

Views: 8681

Answers (2)

best wishes
best wishes

Reputation: 6634

as of

aws-java-sdk-core-1.11.163

SDKGlobalConfiguration.ENABLE_S3_SIGV4_SYSTEM_PROPERTY is deprecated.

I used the below code to call using signature_version='s3'

private static ClientConfiguration config = new ClientConfiguration();

static {
    config.setProtocol(Protocol.HTTP);
    config.setSignerOverride("S3SignerType");
}
private static AmazonS3 s3client = AmazonS3ClientBuilder
    .standard()
    .withClientConfiguration(config)
    .withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration("endpoint", null))
    .withCredentials(new AWSStaticCredentialsProvider(new BasicAWSCredentials("access_key_id", "secret_Key")))
    .build();

Upvotes: 2

James
James

Reputation: 11931

From the S3 Developer Guide - Specifying Signature Version in Request Authentication:

Java SDK

Add the following in your code.

System.setProperty(SDKGlobalConfiguration.ENABLE_S3_SIGV4_SYSTEM_PROPERTY, "true");

Or, on the command line, specify the following.

-Dcom.amazonaws.services.s3.enableV4

It looks like v2 was the default in the AWS SDK previously, but v4 is now the default starting in SDK v1.11.0 (May, 2016).

Upvotes: 12

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