Sig4va Help

[Brybro07]

I've been bashing my head trying to replace my current Sig4 implementation with Sig4va. The documentation for my use is outdated as classes are deprecated and I can't figure out how to use other examples.

My first attempt was trying to copy from the following example: https://github.com/aws-samples/sigv4a-signing-examples/blob/main/java/src/main/java/com/sigv4aSigning/SigV4ASign.java

However, this is 3 years old and it is telling me to use AwsV4aHttpSigner instead.

So now as I'm trying to use AwsV4aHttpSigner with the example in the comments (

aws-sdk-java-v2/core/http-auth-aws/src/main/java/software/amazon/awssdk/http/auth/aws/signer/AwsV4aHttpSigner.java

Line 89 in e9ac904

public interface AwsV4aHttpSigner extends AwsV4FamilyHttpSigner<AwsCredentialsIdentity> {

).

I finally got something to compile and build, but when I test, I get the following error:

java.lang.NoClassDefFoundError: software/amazon/awssdk/identity/spi/Identity
This is an interface being used by AwsSessionCredentialsIdentity, which is used in the example as well. So it isn't complaining that it can't find the AwsSessionCredentialsIdentity class, instead it is complaining about not being able to find the Identity interface which is in the exact same location as AwsSessionCredentialsIdentity (https://github.com/aws/aws-sdk-java-v2/blob/e9ac90437f3e3c2cd3920e441106e057695423df/core/identity-spi/src/main/java/software/amazon/awssdk/identity/spi/Identity.java).

Can someone please tell me where I'm going wrong? I've tried using 2.33.0 and 2.33.3 BOM version for the AWS SDK and both give me the same error.

If anyone has any other suggestions for implementing Sig4va please let me know. Originally I have Sig4 implemented manually and would like to use the AWS SDK to handle the signing requests to make it simpler. But I've been having a very difficult time figuring it out with the documentation and examples being inaccurate or outdated.

Other misc details:

• Pulling jars from Maven Central on compile
• Pulling AWS credentials via IAM role

[bryantholland-art]

Any feedback/comment on this @debora-ito?

[debora-ito]

Originally I have Sig4 implemented manually and would like to use the AWS SDK to handle the signing requests to make it simpler.

If you use the SDK to send the requests you don't need to manually handle the signing, the SDK will sign the requests automatically using SigV4a.

Can you give a little more context on what you're trying to do?
Which service are you trying to send requests to?