Method applyUpdate

mls/src/main/java/org/bouncycastle/mls/protocol/Group.java:1628–1666

(List<CachedProposal> proposals)

    }

    private void applyUpdate(List<CachedProposal> proposals)
        throws Exception
    {
        for (CachedProposal cached : proposals)
        {
            if (cached.proposal.getProposalType() != ProposalType.UPDATE)
            {
                continue;
            }
            if (cached.sender == null)
            {
                throw new Exception("Update without target leaf");
            }
            LeafIndex target = cached.sender;
            if (!target.equals(index))
            {
                tree.updateLeaf(target, cached.proposal.getLeafNode());
                continue;
            }

            if (cachedUpdate == null)
            {
                throw new Exception("Self-update with no cached secret");
            }

            if (!cached.proposal.getLeafNode().equals(cachedUpdate.update.getLeafNode()))
            {
                throw new Exception("Self-update does not match cached data");
            }

            tree.updateLeaf(target, cached.proposal.getLeafNode());
            treePriv.setLeafKey(cachedUpdate.updateSk);
        }

        if (cachedUpdate != null)
        {
            cachedUpdate.reset();
        }
    }

    private boolean extensionsSupported(List<Extension> exts)
    {