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