Package com.exonum.binding.common.crypto

Interface CryptoFunction

public interface CryptoFunction
A crypto function that provides several signature system crypto methods. All method arguments can't be null otherwise NullPointerException will be thrown.

  • Method Summary

    Modifier and Type Method Description
    KeyPair generateKeyPair()
    Generates a private key and a corresponding public key using a random seed.
    KeyPair generateKeyPair​(byte[] seed)
    Generates a private key and a corresponding public key using a seed byte array.
    byte[] signMessage​(byte[] message, PrivateKey privateKey)
    Given a privateKey, computes and returns a signature for the supplied message.
    boolean verify​(byte[] message, byte[] signature, PublicKey publicKey)
    Given a publicKey, verifies that signature is a valid signature for the supplied message.

  • Method Details

    • generateKeyPair

      KeyPair generateKeyPair​(byte[] seed)
      Generates a private key and a corresponding public key using a seed byte array.
      Throws:
      java.lang.IllegalArgumentException - if the specified seed is not valid

    • generateKeyPair

      KeyPair generateKeyPair()
      Generates a private key and a corresponding public key using a random seed.

    • signMessage

      byte[] signMessage​(byte[] message, PrivateKey privateKey)
      Given a privateKey, computes and returns a signature for the supplied message.
      Returns:
      signature as a byte array
      Throws:
      java.lang.IllegalArgumentException - if the private key is not valid for this cryptographic function

    • verify

      boolean verify​(byte[] message, byte[] signature, PublicKey publicKey)
      Given a publicKey, verifies that signature is a valid signature for the supplied message.
      Returns:
      true if signature is valid, false otherwise