Method commit

mls/src/main/java/org/bouncycastle/mls/protocol/Group.java:1020–1160

(Secret leafSecret, CommitOptions commitOptions, MessageOptions msgOptions, CommitParameters params)

    }

    public GroupWithMessage commit(Secret leafSecret, CommitOptions commitOptions, MessageOptions msgOptions, CommitParameters params)
        throws Exception
    {
        Commit commit = new Commit();
        List<KeyPackage> joiners = new ArrayList<KeyPackage>();
        for (CachedProposal cached : pendingProposals)
        {
            if (cached.proposal.getProposalType() == ProposalType.ADD)
            {
                joiners.add(cached.proposal.getAdd().keyPackage);
            }

            commit.getProposals().add(ProposalOrRef.forRef(cached.proposalRef));
        }

        // add the extra proposals to those we had cached
        if (commitOptions != null)
        {
            for (Proposal p : commitOptions.extraProposals)
            {
                if (p.getProposalType() == ProposalType.ADD)
                {
                    joiners.add(p.getAdd().keyPackage);
                }

                commit.getProposals().add(ProposalOrRef.forProposal(p));
            }
        }

        // for external commit insert an external init proposal
        byte[] forceInitSecret = null;
        if (params.paramID == EXTERNAL_COMMIT_PARAMS)
        {
            forceInitSecret = params.forceInitSecret.value().clone();
        }

        // Apply proposals
        Group next = successor();

        List<CachedProposal> proposals = mustResolve(commit.getProposals(), index); // check should just send index.value()
        if (!validateCachedProposals(proposals, index, params))
        {
            throw new Exception("Invalid proposal list");
        }

        JoinersWithPSKS joinersWithpsks = next.apply(proposals);
        if (params.paramID == EXTERNAL_COMMIT_PARAMS)
        {
            next.index = next.tree.addLeaf(params.joinerKeyPackage.getLeafNode());
        }

        // If this is an external commit, indicate it in the sender field
        Sender sender = Sender.forMember(index);
        if (params.paramID == EXTERNAL_COMMIT_PARAMS)
        {
            sender = Sender.forNewMemberCommit();
        }