Top Description Methods
org.bouncycastle.tsp.ers

public Interface ERSRootNodeCalculator

Known Direct Implementers
org.bouncycastle.tsp.ers.BinaryTreeRootCalculator
Imports
org.bouncycastle.asn1.tsp.PartialHashtree, org.bouncycastle.operator.DigestCalculator
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 TypeMethod and Description
public PartialHashtree[]
computePathToRoot(DigestCalculator
the digest calculator to use.
digCalc, PartialHashtree
the leaf node at the start of the path.
node, int
the index of the node in the original list of partial hash trees.
index)

Calculate a path from the leaf node to the root of the last computed Merkle tree.

public byte[]

Returns:

the root hash of the Merkle tree.
computeRootHash(DigestCalculator
the digest calculator to use.
digCalc, PartialHashtree[]
the partial hash-trees forming the basis of the Merkle tree.
nodes)

Calculate the root hash of the Merkle tree from the partial hash-tree nodes.

public byte[]

Returns:

the root hash of the Merkle tree.
recoverRootHash(DigestCalculator
the digest calculator to use.
digCalc, PartialHashtree[]
the partial hash-trees forming a path from a leaf to the root of the Merkle tree.
nodes)

Recover the root hash from a path made up of PartialHashtrees.

Method Detail

computePathToRootback to summary
public PartialHashtree[] computePathToRoot(DigestCalculator digCalc, PartialHashtree node, int index)

Calculate a path from the leaf node to the root of the last computed Merkle tree.

Parameters
digCalc:DigestCalculator

the digest calculator to use.

node:PartialHashtree

the leaf node at the start of the path.

index:int

the index of the node in the original list of partial hash trees.

computeRootHashback to summary
public byte[] computeRootHash(DigestCalculator digCalc, PartialHashtree[] nodes)

Calculate the root hash of the Merkle tree from the partial hash-tree nodes.

Parameters
digCalc:DigestCalculator

the digest calculator to use.

nodes:PartialHashtree[]

the partial hash-trees forming the basis of the Merkle tree.

Returns:byte[]

the root hash of the Merkle tree.

recoverRootHashback to summary
public byte[] recoverRootHash(DigestCalculator digCalc, PartialHashtree[] nodes)

Recover the root hash from a path made up of PartialHashtrees.

Parameters
digCalc:DigestCalculator

the digest calculator to use.

nodes:PartialHashtree[]

the partial hash-trees forming a path from a leaf to the root of the Merkle tree.

Returns:byte[]

the root hash of the Merkle tree.