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.
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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.