http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8.
  • The Legion of the Bouncy Castle Inc. 
package org.bouncycastle.pqc.jcajce.spec;

import java.security.spec.AlgorithmParameterSpec;


Key generation spec for SPHINCS-256 to allow specifying of tree hash.

/**
 * Key generation spec for SPHINCS-256 to allow specifying of tree hash.
 */
public class SPHINCS256KeyGenParameterSpec
    implements AlgorithmParameterSpec
{
    
Use SHA512-256 for the tree generation function.

/**
     * Use SHA512-256 for the tree generation function.
     */
    public static final String SHA512_256 = "SHA512-256";

    
Use SHA3-256 for the tree generation function.

/**
     * Use SHA3-256 for the tree generation function.
     */
    public static final String SHA3_256 = "SHA3-256";

    private final String treeHash;

    
Default constructor SHA512-256

/**
     * Default constructor SHA512-256
     */
    public SPHINCS256KeyGenParameterSpec()
    {
        this(SHA512_256);
    }

    
Specify the treehash, one of SHA512-256, or SHA3-256.

Params:
  • treeHash – the hash for building the public key tree.
/**
     * Specify the treehash, one of SHA512-256, or SHA3-256.
     *
     * @param treeHash the hash for building the public key tree.
     */
    public SPHINCS256KeyGenParameterSpec(String treeHash)
    {
        this.treeHash = treeHash;
    }

    public String getTreeDigest()
    {
        return treeHash;
    }
}