Is there a .NET library that can sign a request with AWS V4 Signature?

Question

I have an API Gateway where I'm setting the authentication to use AWS_IAM. This requires that I sign each request with the AWS V4 signature and attach the HMAC in the header. I've found libraries to sign a request with the V4 signature in nodejs. But I cannot find a library to sign for me. Even the aws-sdk for .NET has this abstracted for their own specific use case. Is there a library out there (i've done a quick google search and found no results)? Or do I need to write out the hmac myself?

Answer 1

you can read on how the signature is done and you can (if you want). I would recommend pulling in the AWS SDK for .NET and using the functionality from the SDK to actually perform the signature.

Here is the signer form the SDK:

https://github.com/aws/aws-sdk-net/blob/6c3be79bdafd5bfff1ab0bf5fec17abc66c7b516/sdk/src/Core/Amazon.Runtime/Internal/Auth/AWS4Signer.cs

You may need to adapt it (ie it knows about AWS services and endpoints by default)