Package org.bouncycastle.pqc.crypto.sphincsplus

Class SPHINCSPlusSigner

  • All Implemented Interfaces:
    MessageSigner
    public class SPHINCSPlusSigner
extends java.lang.Object
implements MessageSigner
    SPHINCS+ signer.

    This version is based on the 3rd submission with deference to the updated reference implementation on github as at November 9th 2021. This version includes the changes for the countermeasure for the long-message second preimage attack - see "https://github.com/sphincs/sphincsplus/commit/61cd2695c6f984b4f4d6ed675378ed9a486cbede" for further details.

    • Constructor Summary

      Constructors 
      Constructor Description
      SPHINCSPlusSigner()
      Base constructor.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      byte[] generateSignature​(byte[] message)
      sign the passed in message (usually the output of a hash function).
      void init​(boolean forSigning, CipherParameters param)
      initialise the signer for signature generation or signature verification.
      boolean verifySignature​(byte[] message, byte[] signature)
      verify the message message against the signature value.

      • Methods inherited from class java.lang.Object

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

    • Constructor Detail

      • SPHINCSPlusSigner

        public SPHINCSPlusSigner()
        Base constructor.

    • Method Detail

      • init

        public void init​(boolean forSigning,
                 CipherParameters param)
        Description copied from interface: MessageSigner
        initialise the signer for signature generation or signature verification.
        Specified by:
        init in interface MessageSigner
        Parameters:
        forSigning - true if we are generating a signature, false otherwise.
        param - key parameters for signature generation.

      • generateSignature

        public byte[] generateSignature​(byte[] message)
        Description copied from interface: MessageSigner
        sign the passed in message (usually the output of a hash function).
        Specified by:
        generateSignature in interface MessageSigner
        Parameters:
        message - the message to be signed.
        Returns:
        the signature of the message

      • verifySignature

        public boolean verifySignature​(byte[] message,
                               byte[] signature)
        Description copied from interface: MessageSigner
        verify the message message against the signature value.
        Specified by:
        verifySignature in interface MessageSigner
        Parameters:
        message - the message that was supposed to have been signed.
        signature - the signature of the message