[wallet] fix bug of empty passphrase

add export command to export the key

Signed-off-by: Leo Chen <leo@harmony.one>

cmd/client/wallet/main.go

@@ -62,8 +62,11 @@ var (
 	newCommandNoPassPtr = newCommand.Bool("nopass", false, "The account has no pass phrase")
 
 	// List subcommands
-	listCommand          = flag.NewFlagSet("list", flag.ExitOnError)
+	listCommand = flag.NewFlagSet("list", flag.ExitOnError)
-	listCommandNoPassPtr = listCommand.Bool("nopass", false, "The account has no pass phrase")
+
+	// Export subcommands
+	exportCommand           = flag.NewFlagSet("export", flag.ExitOnError)
+	exportCommandAccountPtr = exportCommand.String("account", "", "The account to be exported")
 
 	// Account subcommands
 	accountImportCommand = flag.NewFlagSet("import", flag.ExitOnError)
@@ -116,7 +119,6 @@ func main() {
 		fmt.Println("    1. new           - Generates a new account and store the private key locally")
 		fmt.Println("        --nopass         - The private key has no passphrase (for test only)")
 		fmt.Println("    2. list          - Lists all accounts in local keystore")
-		fmt.Println("        --nopass         - The private key has no passphrase (for test only)")
 		fmt.Println("    3. removeAll     - Removes all accounts in local keystore")
 		fmt.Println("    4. import        - Imports a new account by private key")
 		fmt.Println("        --pass           - The passphrase of the private key to import")
@@ -132,6 +134,8 @@ func main() {
 		fmt.Println("        --shardID        - The shard Id for the transfer")
 		fmt.Println("        --inputData      - Base64-encoded input data to embed in the transaction")
 		fmt.Println("        --pass           - Passphrase of sender's private key")
+		fmt.Println("    8. export        - Export account key to a new file")
+		fmt.Println("        --account        - Specify the account to export. Empty will export every key.")
 		os.Exit(1)
 	}
 
@@ -173,6 +177,8 @@ ARG:
 		processNewCommnad()
 	case "list":
 		processListCommand()
+	case "export":
+		processExportCommand()
 	case "removeAll":
 		clearKeystore()
 	case "import":
@@ -248,7 +254,7 @@ func processNewCommnad() {
 	password := ""
 
 	if !noPass {
-		password := utils.AskForPassphrase("Passphrase: ")
+		password = utils.AskForPassphrase("Passphrase: ")
 		password2 := utils.AskForPassphrase("Passphrase again: ")
 		if password != password2 {
 			fmt.Printf("Passphrase doesn't match. Please try again!\n")
@@ -264,38 +270,53 @@ func processNewCommnad() {
 	fmt.Printf("URL: %s\n", account.URL)
 }
 
+func _exportAccount(account accounts.Account) {
+	fmt.Printf("account: %s\n", account.Address.Hex())
+	fmt.Printf("URL: %s\n", account.URL)
+	pass := utils.AskForPassphrase("Original Passphrase: ")
+	newpass := utils.AskForPassphrase("Export Passphrase: ")
+
+	data, err := ks.Export(account, pass, newpass)
+	if err == nil {
+		filename := fmt.Sprintf(".hmy/%s.key", account.Address.Hex())
+		f, err := os.OpenFile(filename, os.O_CREATE|os.O_WRONLY, 0644)
+		if err != nil {
+			panic("Failed to open keystore")
+		}
+		_, err = f.Write(data)
+		if err != nil {
+			panic("Failed to write to keystore")
+		}
+		f.Close()
+		fmt.Printf("Exported keyfile to: %v\n", filename)
+		return
+	}
+	switch err {
+	case accounts.ErrInvalidPassphrase:
+		fmt.Println("Invalid Passphrase")
+	default:
+		fmt.Printf("export error: %v\n", err)
+	}
+}
+
 func processListCommand() {
 	listCommand.Parse(os.Args[2:])
-	noPass := *listCommandNoPassPtr
 
 	allAccounts := ks.Accounts()
 	for _, account := range allAccounts {
 		fmt.Printf("account: %s\n", account.Address.Hex())
 		fmt.Printf("URL: %s\n", account.URL)
-		password := ""
+	}
-		newpass := ""
+}
-		if !noPass {
+
-			password = utils.AskForPassphrase("Passphrase: ")
+func processExportCommand() {
-			newpass = utils.AskForPassphrase("Export Passphrase: ")
+	exportCommand.Parse(os.Args[2:])
-		}
+	acc := *exportCommandAccountPtr
-		data, err := ks.Export(account, password, newpass)
+
-		if err == nil {
+	allAccounts := ks.Accounts()
-			f, err := os.OpenFile(fmt.Sprintf(".hmy/%s.key", account.Address.Hex()), os.O_CREATE|os.O_WRONLY, 0644)
+	for _, account := range allAccounts {
-			if err != nil {
+		if acc == "" || acc == account.Address.Hex() {
-				panic("Failed to open keystore")
+			_exportAccount(account)
-			}
-			_, err = f.Write(data)
-			if err != nil {
-				panic("Failed to write to keystore")
-			}
-			f.Close()
-			continue
-		}
-		switch err {
-		case accounts.ErrInvalidPassphrase:
-			fmt.Println("Invalid Passphrase")
-		default:
-			fmt.Printf("export error: %v\n", err)
 		}
 	}
 }
@@ -432,7 +453,13 @@ func processTransferCommand() {
 		return
 	}
 
-	ks.Unlock(account, senderPass)
+	err = ks.Unlock(account, senderPass)
+	if err != nil {
+		fmt.Printf("Unlock account failed! %v\n", err)
+		return
+	}
+
+	fmt.Printf("Unlock account succeeded! '%v'\n", senderPass)
 
 	tx, err = ks.SignTx(account, tx, nil)
 	if err != nil {