cmd/clef, signer/core: password input fixes (#20960)

* cmd/clef, signer/core: use better terminal input for passwords, make it possible to avoid boot-up warning

* all: move commonly used prompter to isolated (small) package

* cmd/clef: Add new --acceptWarn to clef README

* cmd/clef: rename flag 'acceptWarn' to 'suppress-bootwarn'

Co-authored-by: ligi <ligi@ligi.de>

cmd/clef/README.md

@@ -46,6 +46,7 @@ GLOBAL OPTIONS:
    --stdio-ui              Use STDIN/STDOUT as a channel for an external UI. This means that an STDIN/STDOUT is used for RPC-communication with a e.g. a graphical user interface, and can be used when Clef is started by an external process.
    --stdio-ui-test         Mechanism to test interface between Clef and UI. Requires 'stdio-ui'.
    --advanced              If enabled, issues warnings instead of rejections for suspicious requests. Default off
+   --suppress-bootwarn     If set, does not show the warning during boot
    --help, -h              show help
    --version, -v           print the version
 ```

cmd/clef/main.go

@@ -40,7 +40,7 @@ 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"
+	"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"
@@ -82,6 +82,10 @@ var (
 		Name:  "advanced",
 		Usage: "If enabled, issues warnings instead of rejections for suspicious requests. Default off",
 	}
+	acceptFlag = cli.BoolFlag{
+		Name:  "suppress-bootwarn",
+		Usage: "If set, does not show the warning during boot",
+	}
 	keystoreFlag = cli.StringFlag{
 		Name:  "keystore",
 		Value: filepath.Join(node.DefaultDataDir(), "keystore"),
@@ -196,6 +200,7 @@ The delpw command removes a password for a given address (keyfile).
 			logLevelFlag,
 			keystoreFlag,
 			utils.LightKDFFlag,
+			acceptFlag,
 		},
 		Description: `
 The newaccount command creates a new keystore-backed account. It is a convenience-method
@@ -235,6 +240,7 @@ func init() {
 		stdiouiFlag,
 		testFlag,
 		advancedMode,
+		acceptFlag,
 	}
 	app.Action = signer
 	app.Commands = []cli.Command{initCommand,
@@ -433,8 +439,10 @@ func initialize(c *cli.Context) error {
 	if c.GlobalBool(stdiouiFlag.Name) {
 		logOutput = os.Stderr
 		// If using the stdioui, we can't do the 'confirm'-flow
+		if !c.GlobalBool(acceptFlag.Name) {
 			fmt.Fprint(logOutput, legalWarning)
-	} else {
+		}
+	} else if !c.GlobalBool(acceptFlag.Name) {
 		if !confirm(legalWarning) {
 			return fmt.Errorf("aborted by user")
 		}
@@ -910,14 +918,14 @@ 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(prompt string, confirmation bool) string {
+func getPassPhrase(query string, confirmation bool) string {
-	fmt.Println(prompt)
+	fmt.Println(query)
-	password, err := console.Stdin.PromptPassword("Password: ")
+	password, err := prompt.Stdin.PromptPassword("Password: ")
 	if err != nil {
 		utils.Fatalf("Failed to read password: %v", err)
 	}
 	if confirmation {
-		confirm, err := console.Stdin.PromptPassword("Repeat password: ")
+		confirm, err := prompt.Stdin.PromptPassword("Repeat password: ")
 		if err != nil {
 			utils.Fatalf("Failed to read password confirmation: %v", err)
 		}

cmd/devp2p/dnscmd.go

@@ -27,7 +27,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/accounts/keystore"
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/console"
+	"github.com/ethereum/go-ethereum/console/prompt"
 	"github.com/ethereum/go-ethereum/p2p/dnsdisc"
 	"github.com/ethereum/go-ethereum/p2p/enode"
 	cli "gopkg.in/urfave/cli.v1"
@@ -226,7 +226,7 @@ func loadSigningKey(keyfile string) *ecdsa.PrivateKey {
 	if err != nil {
 		exit(fmt.Errorf("failed to read the keyfile at '%s': %v", keyfile, err))
 	}
-	password, _ := console.Stdin.PromptPassword("Please enter the password for '" + keyfile + "': ")
+	password, _ := prompt.Stdin.PromptPassword("Please enter the password for '" + keyfile + "': ")
 	key, err := keystore.DecryptKey(keyjson, password)
 	if err != nil {
 		exit(fmt.Errorf("error decrypting key: %v", err))

cmd/ethkey/utils.go

@@ -23,7 +23,7 @@ import (
 	"strings"
 
 	"github.com/ethereum/go-ethereum/cmd/utils"
-	"github.com/ethereum/go-ethereum/console"
+	"github.com/ethereum/go-ethereum/console/prompt"
 	"github.com/ethereum/go-ethereum/crypto"
 	"gopkg.in/urfave/cli.v1"
 )
@@ -31,13 +31,13 @@ import (
 // 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 := console.Stdin.PromptPassword("Password: ")
+	passphrase, err := prompt.Stdin.PromptPassword("Password: ")
 	if err != nil {
 		utils.Fatalf("Failed to read password: %v", err)
 	}
 
 	if confirmation {
-		confirm, err := console.Stdin.PromptPassword("Repeat password: ")
+		confirm, err := prompt.Stdin.PromptPassword("Repeat password: ")
 		if err != nil {
 			utils.Fatalf("Failed to read password confirmation: %v", err)
 		}

cmd/geth/accountcmd.go

@@ -23,7 +23,7 @@ import (
 	"github.com/ethereum/go-ethereum/accounts"
 	"github.com/ethereum/go-ethereum/accounts/keystore"
 	"github.com/ethereum/go-ethereum/cmd/utils"
-	"github.com/ethereum/go-ethereum/console"
+	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"
@@ -247,12 +247,12 @@ func getPassPhrase(prompt string, confirmation bool, i int, passwords []string)
 	if prompt != "" {
 		fmt.Println(prompt)
 	}
-	password, err := console.Stdin.PromptPassword("Password: ")
+	password, err := prompt2.Stdin.PromptPassword("Password: ")
 	if err != nil {
 		utils.Fatalf("Failed to read password: %v", err)
 	}
 	if confirmation {
-		confirm, err := console.Stdin.PromptPassword("Repeat password: ")
+		confirm, err := prompt2.Stdin.PromptPassword("Repeat password: ")
 		if err != nil {
 			utils.Fatalf("Failed to read password confirmation: %v", err)
 		}

cmd/geth/chaincmd.go

@@ -28,7 +28,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/cmd/utils"
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/console"
+	"github.com/ethereum/go-ethereum/console/prompt"
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/rawdb"
 	"github.com/ethereum/go-ethereum/core/state"
@@ -521,7 +521,7 @@ func removeDB(ctx *cli.Context) error {
 // confirmAndRemoveDB prompts the user for a last confirmation and removes the
 // folder if accepted.
 func confirmAndRemoveDB(database string, kind string) {
-	confirm, err := console.Stdin.PromptConfirm(fmt.Sprintf("Remove %s (%s)?", kind, database))
+	confirm, err := prompt.Stdin.PromptConfirm(fmt.Sprintf("Remove %s (%s)?", kind, database))
 	switch {
 	case err != nil:
 		utils.Fatalf("%v", err)

cmd/geth/main.go

@@ -33,7 +33,7 @@ import (
 	"github.com/ethereum/go-ethereum/accounts/keystore"
 	"github.com/ethereum/go-ethereum/cmd/utils"
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/console"
+	"github.com/ethereum/go-ethereum/console/prompt"
 	"github.com/ethereum/go-ethereum/eth"
 	"github.com/ethereum/go-ethereum/eth/downloader"
 	"github.com/ethereum/go-ethereum/ethclient"
@@ -258,7 +258,7 @@ func init() {
 	}
 	app.After = func(ctx *cli.Context) error {
 		debug.Exit()
-		console.Stdin.Close() // Resets terminal mode.
+		prompt.Stdin.Close() // Resets terminal mode.
 		return nil
 	}
 }

cmd/wnode/main.go

@@ -38,7 +38,7 @@ 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"
+	"github.com/ethereum/go-ethereum/console/prompt"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/p2p"
@@ -210,7 +210,7 @@ func initialize() {
 
 	if *mailServerMode {
 		if len(msPassword) == 0 {
-			msPassword, err = console.Stdin.PromptPassword("Please enter the Mail Server password: ")
+			msPassword, err = prompt.Stdin.PromptPassword("Please enter the Mail Server password: ")
 			if err != nil {
 				utils.Fatalf("Failed to read Mail Server password: %s", err)
 			}
@@ -346,7 +346,7 @@ func configureNode() {
 	if *requestMail {
 		p2pAccept = true
 		if len(msPassword) == 0 {
-			msPassword, err = console.Stdin.PromptPassword("Please enter the Mail Server password: ")
+			msPassword, err = prompt.Stdin.PromptPassword("Please enter the Mail Server password: ")
 			if err != nil {
 				utils.Fatalf("Failed to read Mail Server password: %s", err)
 			}
@@ -355,7 +355,7 @@ func configureNode() {
 
 	if !*asymmetricMode && !*forwarderMode {
 		if len(symPass) == 0 {
-			symPass, err = console.Stdin.PromptPassword("Please enter the password for symmetric encryption: ")
+			symPass, err = prompt.Stdin.PromptPassword("Please enter the password for symmetric encryption: ")
 			if err != nil {
 				utils.Fatalf("Failed to read password: %v", err)
 			}

console/bridge.go

@@ -28,6 +28,7 @@ import (
 	"github.com/ethereum/go-ethereum/accounts/scwallet"
 	"github.com/ethereum/go-ethereum/accounts/usbwallet"
 	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/console/prompt"
 	"github.com/ethereum/go-ethereum/internal/jsre"
 	"github.com/ethereum/go-ethereum/rpc"
 )
@@ -36,12 +37,12 @@ import (
 // environment and the Go RPC connection backing the remote method calls.
 type bridge struct {
 	client   *rpc.Client         // RPC client to execute Ethereum requests through
-	prompter UserPrompter // Input prompter to allow interactive user feedback
+	prompter prompt.UserPrompter // Input prompter to allow interactive user feedback
 	printer  io.Writer           // Output writer to serialize any display strings to
 }
 
 // newBridge creates a new JavaScript wrapper around an RPC client.
-func newBridge(client *rpc.Client, prompter UserPrompter, printer io.Writer) *bridge {
+func newBridge(client *rpc.Client, prompter prompt.UserPrompter, printer io.Writer) *bridge {
 	return &bridge{
 		client:   client,
 		prompter: prompter,

console/console.go

@@ -29,6 +29,7 @@ import (
 	"syscall"
 
 	"github.com/dop251/goja"
+	"github.com/ethereum/go-ethereum/console/prompt"
 	"github.com/ethereum/go-ethereum/internal/jsre"
 	"github.com/ethereum/go-ethereum/internal/jsre/deps"
 	"github.com/ethereum/go-ethereum/internal/web3ext"
@@ -56,7 +57,7 @@ type Config struct {
 	DocRoot  string              // Filesystem path from where to load JavaScript files from
 	Client   *rpc.Client         // RPC client to execute Ethereum requests through
 	Prompt   string              // Input prompt prefix string (defaults to DefaultPrompt)
-	Prompter UserPrompter // Input prompter to allow interactive user feedback (defaults to TerminalPrompter)
+	Prompter prompt.UserPrompter // Input prompter to allow interactive user feedback (defaults to TerminalPrompter)
 	Printer  io.Writer           // Output writer to serialize any display strings to (defaults to os.Stdout)
 	Preload  []string            // Absolute paths to JavaScript files to preload
 }
@@ -68,7 +69,7 @@ type Console struct {
 	client   *rpc.Client         // RPC client to execute Ethereum requests through
 	jsre     *jsre.JSRE          // JavaScript runtime environment running the interpreter
 	prompt   string              // Input prompt prefix string
-	prompter UserPrompter // Input prompter to allow interactive user feedback
+	prompter prompt.UserPrompter // Input prompter to allow interactive user feedback
 	histPath string              // Absolute path to the console scrollback history
 	history  []string            // Scroll history maintained by the console
 	printer  io.Writer           // Output writer to serialize any display strings to
@@ -79,7 +80,7 @@ type Console struct {
 func New(config Config) (*Console, error) {
 	// Handle unset config values gracefully
 	if config.Prompter == nil {
-		config.Prompter = Stdin
+		config.Prompter = prompt.Stdin
 	}
 	if config.Prompt == "" {
 		config.Prompt = DefaultPrompt

console/console_test.go

@@ -28,6 +28,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/consensus/ethash"
+	"github.com/ethereum/go-ethereum/console/prompt"
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/eth"
 	"github.com/ethereum/go-ethereum/internal/jsre"
@@ -70,7 +71,7 @@ func (p *hookedPrompter) PromptConfirm(prompt string) (bool, error) {
 func (p *hookedPrompter) SetHistory(history []string)                     {}
 func (p *hookedPrompter) AppendHistory(command string)                    {}
 func (p *hookedPrompter) ClearHistory()                                   {}
-func (p *hookedPrompter) SetWordCompleter(completer WordCompleter) {}
+func (p *hookedPrompter) SetWordCompleter(completer prompt.WordCompleter) {}
 
 // tester is a console test environment for the console tests to operate on.
 type tester struct {

console/prompt/prompter.go

@@ -14,7 +14,7 @@
 // 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 console
+package prompt
 
 import (
 	"fmt"

signer/core/cliui.go

@@ -25,9 +25,9 @@ import (
 	"sync"
 
 	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/console/prompt"
 	"github.com/ethereum/go-ethereum/internal/ethapi"
 	"github.com/ethereum/go-ethereum/log"
-	"golang.org/x/crypto/ssh/terminal"
 )
 
 type CommandlineUI struct {
@@ -61,17 +61,16 @@ func (ui *CommandlineUI) readString() string {
 func (ui *CommandlineUI) OnInputRequired(info UserInputRequest) (UserInputResponse, error) {
 
 	fmt.Printf("## %s\n\n%s\n", info.Title, info.Prompt)
+	defer fmt.Println("-----------------------")
 	if info.IsPassword {
-		fmt.Printf("> ")
+		text, err := prompt.Stdin.PromptPassword("> ")
-		text, err := terminal.ReadPassword(int(os.Stdin.Fd()))
 		if err != nil {
-			log.Error("Failed to read password", "err", err)
+			log.Error("Failed to read password", "error", err)
+			return UserInputResponse{}, err
 		}
-		fmt.Println("-----------------------")
+		return UserInputResponse{text}, nil
-		return UserInputResponse{string(text)}, err
 	}
 	text := ui.readString()
-	fmt.Println("-----------------------")
 	return UserInputResponse{text}, nil
 }