chore: refactor password code for StdIO (#139)

pkg/stdio/console.go

@@ -67,7 +67,7 @@ func (t *terminalStdio) GetStringInput(prompt, defaultValue string) (input strin
 	return
 }
 
-// GetSecret prompts the user for a password.
+// GetSecret prompts the user for a secret.
 func (t *terminalStdio) GetSecret(prompt string, minLen int) (password string, err error) {
 	question := survey.Password{Message: prompt}
 	opts := []survey.AskOpt{survey.WithStdio(t.Stdin, t.Stdout, t.Stderr)}
@@ -79,6 +79,24 @@ func (t *terminalStdio) GetSecret(prompt string, minLen int) (password string, e
 	return
 }
 
+// GetPassword prompts the user for a secret twice, and inputs must match.
+// Uses stdio.MinPasswordLen as the minimum input length
+func (t *terminalStdio) GetPassword(prompt string) (string, error) {
+	pass1, err := t.GetSecret(prompt, MinPasswordLen)
+	if err != nil {
+		return "", err
+	}
+	// Don't bother with the length check the 2nd time, since we check equality to pass1.
+	pass2, err := t.GetSecret(prompt+" again", 0)
+	if err != nil {
+		return "", err
+	}
+	if pass1 == pass2 {
+		return pass1, nil
+	}
+	return "", t.Error("Passwords do not match")
+}
+
 // GetConfirm asks the user for a y/n answer to a prompt.
 func (t *terminalStdio) GetConfirm(prompt string) (answer bool) {
 	question := survey.Confirm{

pkg/stdio/stdio.go

@@ -2,6 +2,8 @@ package stdio
 
 import "io"
 
+const MinPasswordLen = 8
+
 type StdIO interface {
 	io.Writer
 	WriteErr(p []byte) (n int, err error)
@@ -9,5 +11,6 @@ type StdIO interface {
 	Error(message string) error
 	GetStringInput(prompt, defaultValue string) (string, error)
 	GetSecret(prompt string, minLen int) (string, error)
+	GetPassword(prompt string) (string, error)
 	GetConfirm(prompt string) bool
 }