cmd: abstract getPassPhrase functions into one (#21219)

* [cmd] Abstract `getPassPhrase` functions into one.

* cmd/ethkey: fix compilation failure

Co-authored-by: rjl493456442 <garyrong0905@gmail.com>

cmd/clef/main.go

@@ -40,7 +40,6 @@ import (
 	"github.com/ethereum/go-ethereum/cmd/utils"
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/common/hexutil"
-	"github.com/ethereum/go-ethereum/console/prompt"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/internal/ethapi"
@@ -289,7 +288,7 @@ func initializeSecrets(c *cli.Context) error {
 	text := "The master seed of clef will be locked with a password.\nPlease specify a password. Do not forget this password!"
 	var password string
 	for {
-		password = getPassPhrase(text, true)
+		password = utils.GetPassPhrase(text, true)
 		if err := core.ValidatePasswordFormat(password); err != nil {
 			fmt.Printf("invalid password: %v\n", err)
 		} else {
@@ -362,7 +361,7 @@ func setCredential(ctx *cli.Context) error {
 		utils.Fatalf("Invalid address specified: %s", addr)
 	}
 	address := common.HexToAddress(addr)
-	password := getPassPhrase("Please enter a password to store for this address:", true)
+	password := utils.GetPassPhrase("Please enter a password to store for this address:", true)
 	fmt.Println()
 
 	stretchedKey, err := readMasterKey(ctx, nil)
@@ -720,7 +719,7 @@ func readMasterKey(ctx *cli.Context, ui core.UIClientAPI) ([]byte, error) {
 		}
 		password = resp.Text
 	} else {
-		password = getPassPhrase("Decrypt master seed of clef", false)
+		password = utils.GetPassPhrase("Decrypt master seed of clef", false)
 	}
 	masterSeed, err := decryptSeed(cipherKey, password)
 	if err != nil {
@@ -915,27 +914,6 @@ func testExternalUI(api *core.SignerAPI) {
 
 }
 
-// getPassPhrase retrieves the password associated with clef, either fetched
-// from a list of preloaded passphrases, or requested interactively from the user.
-// TODO: there are many `getPassPhrase` functions, it will be better to abstract them into one.
-func getPassPhrase(query string, confirmation bool) string {
-	fmt.Println(query)
-	password, err := prompt.Stdin.PromptPassword("Password: ")
-	if err != nil {
-		utils.Fatalf("Failed to read password: %v", err)
-	}
-	if confirmation {
-		confirm, err := prompt.Stdin.PromptPassword("Repeat password: ")
-		if err != nil {
-			utils.Fatalf("Failed to read password confirmation: %v", err)
-		}
-		if password != confirm {
-			utils.Fatalf("Passwords do not match")
-		}
-	}
-	return password
-}
-
 type encryptedSeedStorage struct {
 	Description string              `json:"description"`
 	Version     int                 `json:"version"`

cmd/ethkey/changepassword.go

@@ -67,7 +67,7 @@ Change the password of a keyfile.`,
 			}
 			newPhrase = strings.TrimRight(string(content), "\r\n")
 		} else {
-			newPhrase = promptPassphrase(true)
+			newPhrase = utils.GetPassPhrase("", true)
 		}
 
 		// Encrypt the key with the new passphrase.

cmd/ethkey/utils.go

@@ -23,32 +23,10 @@ import (
 	"strings"
 
 	"github.com/ethereum/go-ethereum/cmd/utils"
-	"github.com/ethereum/go-ethereum/console/prompt"
 	"github.com/ethereum/go-ethereum/crypto"
 	"gopkg.in/urfave/cli.v1"
 )
 
-// promptPassphrase prompts the user for a passphrase.  Set confirmation to true
-// to require the user to confirm the passphrase.
-func promptPassphrase(confirmation bool) string {
-	passphrase, err := prompt.Stdin.PromptPassword("Password: ")
-	if err != nil {
-		utils.Fatalf("Failed to read password: %v", err)
-	}
-
-	if confirmation {
-		confirm, err := prompt.Stdin.PromptPassword("Repeat password: ")
-		if err != nil {
-			utils.Fatalf("Failed to read password confirmation: %v", err)
-		}
-		if passphrase != confirm {
-			utils.Fatalf("Passwords do not match")
-		}
-	}
-
-	return passphrase
-}
-
 // getPassphrase obtains a passphrase given by the user.  It first checks the
 // --passfile command line flag and ultimately prompts the user for a
 // passphrase.
@@ -65,7 +43,7 @@ func getPassphrase(ctx *cli.Context, confirmation bool) string {
 	}
 
 	// Otherwise prompt the user for the passphrase.
-	return promptPassphrase(confirmation)
+	return utils.GetPassPhrase("", confirmation)
 }
 
 // signHash is a helper function that calculates a hash for the given message

cmd/geth/accountcmd.go

@@ -23,7 +23,6 @@ import (
 	"github.com/ethereum/go-ethereum/accounts"
 	"github.com/ethereum/go-ethereum/accounts/keystore"
 	"github.com/ethereum/go-ethereum/cmd/utils"
-	prompt2 "github.com/ethereum/go-ethereum/console/prompt"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/log"
 	"gopkg.in/urfave/cli.v1"
@@ -212,7 +211,7 @@ func unlockAccount(ks *keystore.KeyStore, address string, i int, passwords []str
 	}
 	for trials := 0; trials < 3; trials++ {
 		prompt := fmt.Sprintf("Unlocking account %s | Attempt %d/%d", address, trials+1, 3)
-		password := getPassPhrase(prompt, false, i, passwords)
+		password := utils.GetPassPhraseWithList(prompt, false, i, passwords)
 		err = ks.Unlock(account, password)
 		if err == nil {
 			log.Info("Unlocked account", "address", account.Address.Hex())
@@ -233,36 +232,6 @@ func unlockAccount(ks *keystore.KeyStore, address string, i int, passwords []str
 	return accounts.Account{}, ""
 }
 
-// getPassPhrase retrieves the password associated with an account, either fetched
-// from a list of preloaded passphrases, or requested interactively from the user.
-func getPassPhrase(prompt string, confirmation bool, i int, passwords []string) string {
-	// If a list of passwords was supplied, retrieve from them
-	if len(passwords) > 0 {
-		if i < len(passwords) {
-			return passwords[i]
-		}
-		return passwords[len(passwords)-1]
-	}
-	// Otherwise prompt the user for the password
-	if prompt != "" {
-		fmt.Println(prompt)
-	}
-	password, err := prompt2.Stdin.PromptPassword("Password: ")
-	if err != nil {
-		utils.Fatalf("Failed to read password: %v", err)
-	}
-	if confirmation {
-		confirm, err := prompt2.Stdin.PromptPassword("Repeat password: ")
-		if err != nil {
-			utils.Fatalf("Failed to read password confirmation: %v", err)
-		}
-		if password != confirm {
-			utils.Fatalf("Passwords do not match")
-		}
-	}
-	return password
-}
-
 func ambiguousAddrRecovery(ks *keystore.KeyStore, err *keystore.AmbiguousAddrError, auth string) accounts.Account {
 	fmt.Printf("Multiple key files exist for address %x:\n", err.Addr)
 	for _, a := range err.Matches {
@@ -305,7 +274,7 @@ func accountCreate(ctx *cli.Context) error {
 		utils.Fatalf("Failed to read configuration: %v", err)
 	}
 
-	password := getPassPhrase("Your new account is locked with a password. Please give a password. Do not forget this password.", true, 0, utils.MakePasswordList(ctx))
+	password := utils.GetPassPhraseWithList("Your new account is locked with a password. Please give a password. Do not forget this password.", true, 0, utils.MakePasswordList(ctx))
 
 	account, err := keystore.StoreKey(keydir, password, scryptN, scryptP)
 
@@ -333,7 +302,7 @@ func accountUpdate(ctx *cli.Context) error {
 
 	for _, addr := range ctx.Args() {
 		account, oldPassword := unlockAccount(ks, addr, 0, nil)
-		newPassword := getPassPhrase("Please give a new password. Do not forget this password.", true, 0, nil)
+		newPassword := utils.GetPassPhraseWithList("Please give a new password. Do not forget this password.", true, 0, nil)
 		if err := ks.Update(account, oldPassword, newPassword); err != nil {
 			utils.Fatalf("Could not update the account: %v", err)
 		}
@@ -352,7 +321,7 @@ func importWallet(ctx *cli.Context) error {
 	}
 
 	stack, _ := makeConfigNode(ctx)
-	passphrase := getPassPhrase("", false, 0, utils.MakePasswordList(ctx))
+	passphrase := utils.GetPassPhraseWithList("", false, 0, utils.MakePasswordList(ctx))
 
 	ks := stack.AccountManager().Backends(keystore.KeyStoreType)[0].(*keystore.KeyStore)
 	acct, err := ks.ImportPreSaleKey(keyJSON, passphrase)
@@ -373,7 +342,7 @@ func accountImport(ctx *cli.Context) error {
 		utils.Fatalf("Failed to load the private key: %v", err)
 	}
 	stack, _ := makeConfigNode(ctx)
-	passphrase := getPassPhrase("Your new account is locked with a password. Please give a password. Do not forget this password.", true, 0, utils.MakePasswordList(ctx))
+	passphrase := utils.GetPassPhraseWithList("Your new account is locked with a password. Please give a password. Do not forget this password.", true, 0, utils.MakePasswordList(ctx))
 
 	ks := stack.AccountManager().Backends(keystore.KeyStoreType)[0].(*keystore.KeyStore)
 	acct, err := ks.ImportECDSA(key, passphrase)

cmd/utils/prompt.go

@@ -0,0 +1,62 @@
+// Copyright 2020 The go-ethereum Authors
+// This file is part of go-ethereum.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Package utils contains internal helper functions for go-ethereum commands.
+package utils
+
+import (
+	"fmt"
+
+	"github.com/ethereum/go-ethereum/console/prompt"
+)
+
+// GetPassPhrase displays the given text(prompt) to the user and requests some textual
+// data to be entered, but one which must not be echoed out into the terminal.
+// The method returns the input provided by the user.
+func GetPassPhrase(text string, confirmation bool) string {
+	if text != "" {
+		fmt.Println(text)
+	}
+	password, err := prompt.Stdin.PromptPassword("Password: ")
+	if err != nil {
+		Fatalf("Failed to read password: %v", err)
+	}
+	if confirmation {
+		confirm, err := prompt.Stdin.PromptPassword("Repeat password: ")
+		if err != nil {
+			Fatalf("Failed to read password confirmation: %v", err)
+		}
+		if password != confirm {
+			Fatalf("Passwords do not match")
+		}
+	}
+	return password
+}
+
+// GetPassPhraseWithList retrieves the password associated with an account, either fetched
+// from a list of preloaded passphrases, or requested interactively from the user.
+func GetPassPhraseWithList(text string, confirmation bool, index int, passwords []string) string {
+	// If a list of passwords was supplied, retrieve from them
+	if len(passwords) > 0 {
+		if index < len(passwords) {
+			return passwords[index]
+		}
+		return passwords[len(passwords)-1]
+	}
+	// Otherwise prompt the user for the password
+	password := GetPassPhrase(text, confirmation)
+	return password
+}

cmd/utils/prompt_test.go

@@ -0,0 +1,74 @@
+// Copyright 2020 The go-ethereum Authors
+// This file is part of go-ethereum.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+// Package utils contains internal helper functions for go-ethereum commands.
+package utils
+
+import (
+	"testing"
+)
+
+func TestGetPassPhraseWithList(t *testing.T) {
+	type args struct {
+		text         string
+		confirmation bool
+		index        int
+		passwords    []string
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			"test1",
+			args{
+				"text1",
+				false,
+				0,
+				[]string{"zero", "one", "two"},
+			},
+			"zero",
+		},
+		{
+			"test2",
+			args{
+				"text2",
+				false,
+				5,
+				[]string{"zero", "one", "two"},
+			},
+			"two",
+		},
+		{
+			"test3",
+			args{
+				"text3",
+				true,
+				1,
+				[]string{"zero", "one", "two"},
+			},
+			"one",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := GetPassPhraseWithList(tt.args.text, tt.args.confirmation, tt.args.index, tt.args.passwords); got != tt.want {
+				t.Errorf("GetPassPhraseWithList() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}