Hello Sven,

You might want to have a look at the code in Zinc-AWS (group AWS in ConfigurationOfZincHTTPComponents), in particular ZnAWSS3Client and ZnAWSS3RequestSignatureTool - it is using similar request signing but does HMAC-SHA1.

Thanks! I wasn't aware of the existence of ZnAWS.
Actually, i'm currently using the HMAC-SHA256 implementation of the CloudFork.
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>From a quick glance at the documentation, it seems you have to use Character lf (\r) else you'll get the wrong result.

I'm using withUnixLineEndings to ensure the Character lf line ending. You meant \n instead of \r, right?
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Have you tried signing the examples (canonical strings) in the documentation and comparing with their result ?

The problem is that they don't tell with which key they've signed the string. It makes it quite hard to decompose the problem and see where something breaks.

The tests in the Ruby SDK are not really useful neither. I'll the other SDKs, maybe the tests are more revealing.

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If you really can't make it work, we can discuss further.

I'll try a bit more and come back if needed!

Thanks !