Sign Ed25519 As Whisper Systems Curve25519 used at Waves

SignAsWaves.scala

package test

import com.muquit.libsodiumjna.SodiumLibrary
import scorex.crypto.encode.Base58
import scorex.crypto.signatures.Curve25519

object SignAsWaves extends App {
  SodiumLibrary.setLibraryPath("/usr/local/Cellar/libsodium/1.0.16/lib/libsodium.dylib")

  val message = "message"

  val ed25519keyPair = SodiumLibrary.cryptoSignKeyPair()

  val ed25519PrivateKey = ed25519keyPair.getPrivateKey
  val ed25519PublicKey = ed25519keyPair.getPublicKey

  println(s"ed private: ${Base58.encode(ed25519PrivateKey)}")
  println(s"ed public: ${Base58.encode(ed25519PublicKey)}")


  val curve25519PrivateKey = SodiumLibrary.cryptoSignEdSkTOcurveSk(ed25519keyPair.getPrivateKey)
  val curve25519PublicKey = SodiumLibrary.cryptoSignEdPkTOcurvePk(ed25519keyPair.getPublicKey)

  println(s"curve private: ${Base58.encode(curve25519PrivateKey)}")
  println(s"curve public: ${Base58.encode(curve25519PublicKey)}")

  val ed25519sign = SodiumLibrary.cryptoSign(message.getBytes, ed25519PrivateKey)
  val curve25519sign = ed25519sign.clone().take(64)

  val pk = ed25519keyPair.getPublicKey
  var sign_bit = (pk(31) & 0x80).toByte
  curve25519sign.update(63, (curve25519sign(63) | sign_bit).toByte)


  println(s"ed25519 sign: ${Base58.encode(ed25519sign)}")
  println(s"ed25519 sign len: ${ed25519sign.length}")
  println(s"curve25519sign sign: ${Base58.encode(curve25519sign)}")
  println(s"curve25519sign sign len: ${curve25519sign.length}")

  println(s"ed25519 signature validation with ed25519: ${SodiumLibrary.cryptoSignVerifyDetached(ed25519sign, message.getBytes, ed25519PublicKey)}")
  println(s"converted ed25519 signature validation with curve25519: ${Curve25519.verify(curve25519sign, message.getBytes, curve25519PublicKey)}")
}

https://{{api-host}}/api/v1/oauth2/token.json