we want to use safe mobile upload with a server side pre-generated signature. In the IOS SDK it is mentioned that a "signedIdentifier" can be generated with
NSString *signedIdentifier = [cloudinary signedPreloadedImage:uploadResponse];
How do I validate this response string in my rails backend? I couldn't find any documentation. The closest I found was a blog post where someone recreated the signature from all params and than compared it to the one returned by the client. He didn't use the aforementioned signedIdentifier.
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