check signature on prysm compatibility

cmd/prysmCompatibilityChecker/main.go

@@ -0,0 +1,96 @@
+package main
+
+import (
+	"encoding/hex"
+	"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 := hex.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 := hex.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 := hex.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 := hex.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)
+	}
+}