Move the prompting/confirmation down into the password implementations.

We don't need to read from stdin or the env var twice :)

Signed-off-by: Dan Lorenc <[email protected]>

cmd/cosign/cli/generate_key_pair.go

@@ -121,8 +121,7 @@ func GenerateKeyPairCmd(ctx context.Context, kmsVal string, args []string) error
 }
 
 func GetPass(confirm bool) ([]byte, error) {
-	read := Read()
-	fmt.Fprint(os.Stderr, "Enter password for private key: ")
+	read := Read(confirm)
 	pw1, err := read()
 	fmt.Fprintln(os.Stderr)
 	if err != nil {
@@ -144,7 +143,7 @@ func GetPass(confirm bool) ([]byte, error) {
 	return pw1, nil
 }
 
-func readPasswordFn() func() ([]byte, error) {
+func readPasswordFn(confirm bool) func() ([]byte, error) {
 	pw, ok := os.LookupEnv("COSIGN_PASSWORD")
 	switch {
 	case ok:
@@ -153,7 +152,7 @@ func readPasswordFn() func() ([]byte, error) {
 		}
 	case term.IsTerminal(0):
 		return func() ([]byte, error) {
-			return term.ReadPassword(0)
+			return getPassFromTerm(confirm)
 		}
 	// Handle piped in passwords.
 	default:
@@ -162,3 +161,22 @@ func readPasswordFn() func() ([]byte, error) {
 		}
 	}
 }
+
+func getPassFromTerm(confirm bool) ([]byte, error) {
+	fmt.Fprint(os.Stderr, "Enter password for private key: ")
+	pw1, err := term.ReadPassword(0)
+	if err != nil {
+		return nil, err
+	}
+	fmt.Fprint(os.Stderr, "Enter again: ")
+	pw2, err := term.ReadPassword(0)
+	fmt.Fprintln(os.Stderr)
+	if err != nil {
+		return nil, err
+	}
+
+	if string(pw1) != string(pw2) {
+		return nil, errors.New("passwords do not match")
+	}
+	return pw1, nil
+}

cmd/cosign/cli/generate_key_pair_test.go

@@ -25,7 +25,7 @@ import (
 func TestReadPasswordFn_env(t *testing.T) {
 	os.Setenv("COSIGN_PASSWORD", "foo")
 	defer os.Unsetenv("COSIGN_PASSWORD")
-	b, err := readPasswordFn()()
+	b, err := readPasswordFn(true)()
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
@@ -37,7 +37,7 @@ func TestReadPasswordFn_env(t *testing.T) {
 func TestReadPasswordFn_envEmptyVal(t *testing.T) {
 	os.Setenv("COSIGN_PASSWORD", "")
 	defer os.Unsetenv("COSIGN_PASSWORD")
-	b, err := readPasswordFn()()
+	b, err := readPasswordFn(true)()
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}