mirror of https://github.com/certusone/dc4bc.git
70 lines
2.1 KiB
Go
70 lines
2.1 KiB
Go
package airgapped
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import (
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"encoding/json"
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"fmt"
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client "github.com/depools/dc4bc/client/types"
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"github.com/depools/dc4bc/fsm/state_machines/signing_proposal_fsm"
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"github.com/depools/dc4bc/fsm/types/requests"
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"github.com/depools/dc4bc/fsm/types/responses"
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"go.dedis.ch/kyber/v3/sign/bls"
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"go.dedis.ch/kyber/v3/sign/tbls"
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)
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func (am *AirgappedMachine) handleStateSigningAwaitPartialKeys(o *client.Operation) error {
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var (
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payload responses.DKGProposalResponsesParticipantResponse
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err error
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)
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if err = json.Unmarshal(o.Payload, &payload); err != nil {
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return fmt.Errorf("failed to unmarshal payload: %w", err)
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}
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partialSign, err := am.createPartialSign(nil, o.DKGIdentifier)
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if err != nil {
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return fmt.Errorf("failed to create partialSign for msg: %w", err)
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}
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req := requests.SigningProposalPartialKeyRequest{
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ParticipantId: 0, // TODO: from where?
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PartialKey: partialSign,
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CreatedAt: o.CreatedAt,
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}
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reqBz, err := json.Marshal(req)
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if err != nil {
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return fmt.Errorf("failed to generate fsm request: %w", err)
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}
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o.Result = reqBz
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o.Event = signing_proposal_fsm.EventSigningPartialKeyReceived
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return nil
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}
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func (am *AirgappedMachine) createPartialSign(msg []byte, dkgIdentifier string) ([]byte, error) {
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blsKeyring, err := am.loadBLSKeyring(dkgIdentifier)
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if err != nil {
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return nil, fmt.Errorf("failed to load blsKeyring: %w", err)
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}
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return tbls.Sign(am.suite, blsKeyring.Share, msg)
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}
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func (am *AirgappedMachine) recoverFullSign(msg []byte, sigShares [][]byte, dkgIdentifier string) ([]byte, error) {
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blsKeyring, err := am.loadBLSKeyring(dkgIdentifier)
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if err != nil {
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return nil, fmt.Errorf("failed to load blsKeyring: %w", err)
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}
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return tbls.Recover(am.suite, blsKeyring.PubPoly, msg, sigShares, len(sigShares), len(sigShares))
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}
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func (am *AirgappedMachine) verifySign(msg []byte, fullSignature []byte, dkgIdentifier string) error {
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blsKeyring, err := am.loadBLSKeyring(dkgIdentifier)
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if err != nil {
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return fmt.Errorf("failed to load blsKeyring: %w", err)
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}
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return bls.Verify(am.suite, blsKeyring.PubPoly.Commit(), msg, fullSignature)
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}
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