Need a C or Objective C program that I can run in XCode IDE on Mac that takes a passphrase and hashes it using SHA256 to derive a private key and the private key is encrypted using Curve25519 to derive the public key. It must be super fast. That is why I want it in C. It must work on Mac I must be able to run it from XCode. Upon successful delivery I might need a bit more around it.
I neither expect the SHA256 nor the Curve25519 to be programmed from scratch. There is a library for SHA256 anyhow. That part I did myself already but just want it to be combined with the Curve25519 algorithm, which is available here public domain: http://cr.yp.to/ecdh.html
I was not able to get it running on the Mac. I am posting this information because I think this will drastically reduce the effort. I am also not expecting any GUI or anything. All I want is a constant (passphrase) I can edit in the source code and then printf line output with the public key.
5 freelancers are bidding on average €159 for this job
Hello. I've developed some objective C and cocoa project. (ex: Cable Troubleshooing, ...) And I've some knowledge about curve cryption technique. Can you share with me your detail request? Thanks.