Package org.bouncycastle.tsp.ers

Interface ERSRootNodeCalculator

All Known Implementing Classes:
BinaryTreeRootCalculator
public interface ERSRootNodeCalculator
Base interface for an implementation that calculates the root hash contained in the time-stamp from the Merkle tree based on the partial hash-tree nodes.

  • Method Summary

    Modifier and Type
    Method
    Description
    org.bouncycastle.asn1.tsp.PartialHashtree[]
    computePathToRoot(DigestCalculator digCalc, org.bouncycastle.asn1.tsp.PartialHashtree node, int index)
    Calculate a path from the leaf node to the root of the last computed Merkle tree.
    byte[]
    computeRootHash(DigestCalculator digCalc, org.bouncycastle.asn1.tsp.PartialHashtree[] nodes)
    Calculate the root hash of the Merkle tree from the partial hash-tree nodes.
    byte[]
    recoverRootHash(DigestCalculator digCalc, org.bouncycastle.asn1.tsp.PartialHashtree[] nodes)
    Recover the root hash from a path made up of PartialHashtrees.

  • Method Details

    • computeRootHash

      byte[] computeRootHash(DigestCalculator digCalc, org.bouncycastle.asn1.tsp.PartialHashtree[] nodes)
      Calculate the root hash of the Merkle tree from the partial hash-tree nodes.
      Parameters:
      digCalc - the digest calculator to use.
      nodes - the partial hash-trees forming the basis of the Merkle tree.
      Returns:
      the root hash of the Merkle tree.

    • computePathToRoot

      org.bouncycastle.asn1.tsp.PartialHashtree[] computePathToRoot(DigestCalculator digCalc, org.bouncycastle.asn1.tsp.PartialHashtree node, int index)
      Calculate a path from the leaf node to the root of the last computed Merkle tree.
      Parameters:
      digCalc - the digest calculator to use.
      node - the leaf node at the start of the path.
      index - the index of the node in the original list of partial hash trees.
      Returns:

    • recoverRootHash

      byte[] recoverRootHash(DigestCalculator digCalc, org.bouncycastle.asn1.tsp.PartialHashtree[] nodes)
      Recover the root hash from a path made up of PartialHashtrees.
      Parameters:
      digCalc - the digest calculator to use.
      nodes - the partial hash-trees forming a path from a leaf to the root of the Merkle tree.
      Returns:
      the root hash of the Merkle tree.