Class Schnorr.KeyPair

java.lang.Object
com.codename1.security.Schnorr.KeyPair
Enclosing class:
Schnorr
public static final class Schnorr.KeyPair extends Object

A private key with its x-only public key, derived once, for signing many messages; the counterpart of libsecp256k1's secp256k1_keypair. The two cannot be supplied separately: signing with a public key that is not the private key's own reveals the private key.

The object holds the private key until destroy() wipes it. Use it from one thread at a time: a destroy racing a sign signs with a half-wiped key. Where a native engine signs, it derives the public key itself and the saving is the engine's to make.

  • Constructor Summary

    Constructors
    Constructor
    Description
    KeyPair(byte[] privateKey)
    Derives the public key of privateKey, which is copied.

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    destroy()
    Wipes the private key; later calls to [#sign(byte[], byte[])] throw.
    byte[]
    getPublicKey()
    The x-only public key, as [Schnorr#publicKey(byte[])] returns it.
    byte[]
    sign(byte[] message, byte[] auxRand)
    Signs a message, giving the signature [Schnorr#sign(byte[], byte[], byte[])] gives.

    Methods inherited from class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • KeyPair

      public KeyPair(byte[] privateKey)

      Derives the public key of privateKey, which is copied.

      Throws
      • CryptoException: if the private key is not valid

  • Method Details

    • getPublicKey

      public byte[] getPublicKey()
      The x-only public key, as [Schnorr#publicKey(byte[])] returns it.

    • sign

      public byte[] sign(byte[] message, byte[] auxRand)

      Signs a message, giving the signature [Schnorr#sign(byte[], byte[], byte[])] gives.

      Throws
      • CryptoException: if the randomness is malformed, or the key has been destroyed

    • destroy

      public void destroy()
      Wipes the private key; later calls to [#sign(byte[], byte[])] throw.