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

cmd/clef/main.go

@@ -82,6 +82,10 @@ var (
 		Name:  "advanced",
 		Usage: "If enabled, issues warnings instead of rejections for suspicious requests. Default off",
 	}
+	acceptFlag = cli.BoolFlag{
+		Name:  "acceptWarn",
+		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")
 		}

signer/core/cliui.go

@@ -25,9 +25,9 @@ import (
 	"sync"
 
 	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/console"
 	"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 := terminal.ReadPassword(int(os.Stdin.Fd()))
+		text, err := console.Stdin.PromptPassword("> ")
 		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{string(text)}, err
+		return UserInputResponse{text}, nil
 	}
 	text := ui.readString()
-	fmt.Println("-----------------------")
 	return UserInputResponse{text}, nil
 }