Merge pull request #63 from depools/feat/prysm-compatibility-checker

Feat/prysm compatibility checker

Makefile

@@ -17,6 +17,8 @@ build-darwin:
 	GOOS=darwin GOARCH=amd64 go build -o dc4bc_cli_darwin ./cmd/dc4bc_cli/
 	@echo "Building dc4bc_airgapped..."
 	GOOS=darwin GOARCH=amd64 go build -o dc4bc_airgapped_darwin ./cmd/airgapped/
+	@echo "Building dc4bc_prysm_compatibility_checker..."
+	GOOS=darwin GOARCH=amd64 go build -o dc4bc_prysm_compatibility_checker_darwin ./cmd/prysm_compatibility_checker/
 
 build-linux:
 	@echo "Building dc4bc_d..."
@@ -25,5 +27,7 @@ build-linux:
 	GOOS=linux GOARCH=amd64 go build -o dc4bc_cli_linux ./cmd/dc4bc_cli/
 	@echo "Building dc4bc_airgapped..."
 	GOOS=linux GOARCH=amd64 go build -o dc4bc_airgapped_linux ./cmd/airgapped/
+	@echo "Building dc4bc_prysm_compatibility_checker..."
+	GOOS=linux GOARCH=amd64 go build -o dc4bc_prysm_compatibility_checker_linux ./cmd/prysm_compatibility_checker/
 
 .PHONY: mocks

client/flow_test.go

@@ -4,7 +4,7 @@ import (
 	"bytes"
 	"context"
 	"crypto/md5"
-	"crypto/rand"
+	"encoding/hex"
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
@@ -15,7 +15,6 @@ import (
 	"testing"
 	"time"
 
-	bls12381 "github.com/corestario/kyber/pairing/bls12381"
 	"github.com/depools/dc4bc/airgapped"
 	"github.com/depools/dc4bc/client/types"
 	"github.com/depools/dc4bc/fsm/state_machines/dkg_proposal_fsm"
@@ -111,14 +110,8 @@ func (n *node) run(t *testing.T) {
 				if err = json.Unmarshal(msg.Data, &pubKeyReq); err != nil {
 					t.Fatalf("failed to unmarshal pubKey request: %v", err)
 				}
-				seed := make([]byte, 32)
-				_, _ = rand.Read(seed)
-				pubKey := bls12381.NewBLS12381Suite(seed).Point()
-				if err = pubKey.UnmarshalBinary(pubKeyReq.MasterKey); err != nil {
-					t.Fatalf("failed to unmarshal pubkey: %v", err)
-				}
 				if err = ioutil.WriteFile(fmt.Sprintf("/tmp/participant_%d.pubkey",
-					pubKeyReq.ParticipantId), []byte(pubKey.String()), 0666); err != nil {
+					pubKeyReq.ParticipantId), []byte(hex.EncodeToString(pubKeyReq.MasterKey)), 0666); err != nil {
 					t.Fatalf("failed to write pubkey to temp file: %v", err)
 				}
 			}

cmd/airgapped/main.go

@@ -116,7 +116,12 @@ func (t *terminal) showFinishedDKGCommand() error {
 	}
 	for dkgID, keyring := range keyrings {
 		fmt.Printf("DKG identifier: %s\n", dkgID)
-		fmt.Printf("PubKey: %s\n", keyring.PubPoly.Commit().String())
+		pubkeyBz, err := keyring.PubPoly.Commit().MarshalBinary()
+		if err != nil {
+			fmt.Println("failed to marshal pubkey: %w", err)
+			continue
+		}
+		fmt.Printf("PubKey: %s\n", base64.StdEncoding.EncodeToString(pubkeyBz))
 		fmt.Println("-----------------------------------------------------")
 	}
 	return nil

cmd/prysm_compatibility_checker/main.go

@@ -0,0 +1,96 @@
+package main
+
+import (
+	"encoding/base64"
+	"fmt"
+	prysmBLS "github.com/prysmaticlabs/prysm/shared/bls"
+	"github.com/spf13/cobra"
+	"io/ioutil"
+	"log"
+)
+
+func checkSignature() *cobra.Command {
+	return &cobra.Command{
+		Use:   "check_signature [signature]",
+		Short: "checks a signature on prysm compatibility",
+		Args:  cobra.ExactArgs(1),
+		Run: func(cmd *cobra.Command, args []string) {
+			sig, err := base64.StdEncoding.DecodeString(args[0])
+			if err != nil {
+				log.Fatalf("failed to decode signature bytes from string: %v", err)
+			}
+			if _, err = prysmBLS.SignatureFromBytes(sig); err != nil {
+				log.Fatalf("failed to get prysm sig from bytes: %v", err)
+			}
+			fmt.Println("Signature is correct")
+		},
+	}
+}
+
+func checkPubKey() *cobra.Command {
+	return &cobra.Command{
+		Use:   "check_pubkey [pubkey]",
+		Short: "checks a pubkey on prysm compatibility",
+		Args:  cobra.ExactArgs(1),
+		Run: func(cmd *cobra.Command, args []string) {
+			pubkey, err := base64.StdEncoding.DecodeString(args[0])
+			if err != nil {
+				log.Fatalf("failed to decode pubkey bytes from string: %v", err)
+			}
+			if _, err = prysmBLS.PublicKeyFromBytes(pubkey); err != nil {
+				log.Fatalf("failed to get prysm pubkey from bytes: %v", err)
+			}
+			fmt.Println("Public key is correct")
+		},
+	}
+}
+
+func verify() *cobra.Command {
+	return &cobra.Command{
+		Use:   "verify [signature] [pubkey] [file]",
+		Short: "verify signature with Prysm",
+		Args:  cobra.ExactArgs(3),
+		Run: func(cmd *cobra.Command, args []string) {
+			sig, err := base64.StdEncoding.DecodeString(args[0])
+			if err != nil {
+				log.Fatalf("failed to decode signature bytes from string: %v", err)
+			}
+			prysmSig, err := prysmBLS.SignatureFromBytes(sig)
+			if err != nil {
+				log.Fatalf("failed to get prysm sig from bytes: %v", err)
+			}
+			pubkey, err := base64.StdEncoding.DecodeString(args[1])
+			if err != nil {
+				log.Fatalf("failed to decode pubkey bytes from string: %v", err)
+			}
+			prysmPubKey, err := prysmBLS.PublicKeyFromBytes(pubkey)
+			if err != nil {
+				log.Fatalf("failed to get prysm pubkey from bytes: %v", err)
+			}
+			msg, err := ioutil.ReadFile(args[2])
+			if err != nil {
+				log.Fatalf("failed to read file: %v", err)
+			}
+			if !prysmSig.Verify(prysmPubKey, msg) {
+				log.Fatalf("failed to verify prysm signature")
+			}
+			fmt.Println("Signature is correct")
+		},
+	}
+}
+
+var rootCmd = &cobra.Command{
+	Use:   "./prysmCompatibilityChecker",
+	Short: "util to check signatures and pubkeys compatibility with Prysm",
+}
+
+func main() {
+	rootCmd.AddCommand(
+		checkPubKey(),
+		checkSignature(),
+		verify(),
+	)
+	if err := rootCmd.Execute(); err != nil {
+		log.Fatalf("Failed to execute root command: %v", err)
+	}
+}