use common function to read password

Signed-off-by: Tomasz Duda <tomaszduda23@gmail.com>

age/keysource.go

@@ -15,7 +15,6 @@ import (
 	"filippo.io/age/agessh"
 	"filippo.io/age/armor"
 	"github.com/sirupsen/logrus"
-	"golang.org/x/term"
 
 	gpgagent "github.com/getsops/gopgagent"
 	"github.com/getsops/sops/v3/logging"
@@ -370,28 +369,11 @@ func (key *MasterKey) loadIdentities() (ParsedIdentities, error) {
 				Passphrase: func() (string, error) {
 					conn, err := gpgagent.NewConn()
 					if err != nil {
-						fmt.Fprintf(os.Stderr, "Enter passphrase for identity '%s':", n)
-
-						var pass string
-						if term.IsTerminal(int(os.Stdout.Fd())) {
-							p, err = term.ReadPassword(int(os.Stdout.Fd()))
-							if err == nil {
-								pass = string(p)
-							}
-						} else {
-							reader := bufio.NewReader(os.Stdin)
-							pass, err = reader.ReadString('\n')
-							if err == io.EOF {
-								err = nil
-							}
-						}
+						passphrase, err := readPassphrase("Enter passphrase for identity " + n + ":")
 						if err != nil {
-							return "", fmt.Errorf("could not read passphrase: %v", err)
+							return "", err
 						}
-
-						fmt.Fprintln(os.Stderr)
-
-						return pass, nil
+						return string(passphrase), nil
 					}
 					defer func(conn *gpgagent.Conn) {
 						if err := conn.Close(); err != nil {

age/keysource_test.go

@@ -2,7 +2,6 @@ package age
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -520,10 +519,7 @@ func TestMasterKey_Identities_Passphrase(t *testing.T) {
 		t.Setenv(SopsAgeKeyEnv, mockEncryptedIdentity)
 		//blocks calling gpg-agent
 		os.Unsetenv("XDG_RUNTIME_DIR")
-
-		funcDefer, _ := mockStdin(t, mockIdentityPassphrase)
-		defer funcDefer()
-
+		t.Setenv(SopsAgePasswordEnv, mockIdentityPassphrase)
 		got, err := key.Decrypt()
 
 		assert.NoError(t, err)
@@ -542,9 +538,7 @@ func TestMasterKey_Identities_Passphrase(t *testing.T) {
 		t.Setenv(SopsAgeKeyFileEnv, keyPath)
 		//blocks calling gpg-agent
 		os.Unsetenv("XDG_RUNTIME_DIR")
-
-		funcDefer, _ := mockStdin(t, mockIdentityPassphrase)
-		defer funcDefer()
+		t.Setenv(SopsAgePasswordEnv, mockIdentityPassphrase)
 
 		got, err := key.Decrypt()
 		assert.NoError(t, err)
@@ -556,9 +550,7 @@ func TestMasterKey_Identities_Passphrase(t *testing.T) {
 		t.Setenv(SopsAgeKeyEnv, mockEncryptedIdentity)
 		//blocks calling gpg-agent
 		os.Unsetenv("XDG_RUNTIME_DIR")
-
-		funcDefer, _ := mockStdin(t, mockIdentityPassphrase)
-		defer funcDefer()
+		t.Setenv(SopsAgePasswordEnv, mockIdentityPassphrase)
 
 		got, err := key.Decrypt()
 		assert.Error(t, err)
@@ -566,39 +558,3 @@ func TestMasterKey_Identities_Passphrase(t *testing.T) {
 		assert.Nil(t, got)
 	})
 }
-
-// mockStdin is a helper function that lets the test pretend dummyInput as os.Stdin.
-// It will return a function for `defer` to clean up after the test.
-//
-// Note: `ioutil.TempFile` should be replaced to `os.CreateTemp` for Go v1.16 or higher.
-func mockStdin(t *testing.T, dummyInput string) (funcDefer func(), err error) {
-	t.Helper()
-
-	oldOsStdin := os.Stdin
-
-	fmt.Println(t.TempDir(), t.Name())
-
-	tmpfile, err := ioutil.TempFile(t.TempDir(), strings.Replace(t.Name(), "/", "_", -1))
-	if err != nil {
-		return nil, err
-	}
-
-	content := []byte(dummyInput)
-
-	if _, err := tmpfile.Write(content); err != nil {
-		return nil, err
-	}
-
-	if _, err := tmpfile.Seek(0, 0); err != nil {
-		return nil, err
-	}
-
-	// Set stdin to the temp file
-	os.Stdin = tmpfile
-
-	return func() {
-		// clean up
-		os.Stdin = oldOsStdin
-		os.Remove(tmpfile.Name())
-	}, nil
-}

age/tui.go

@@ -18,9 +18,18 @@ import (
 	"golang.org/x/term"
 )
 
+const (
+	SopsAgePasswordEnv = "SOPS_AGE_PASSWORD"
+)
+
 // readPassphrase reads a passphrase from the terminal. It does not read from a
 // non-terminal stdin, so it does not check stdinInUse.
 func readPassphrase(prompt string) ([]byte, error) {
+	password := os.Getenv(SopsAgePasswordEnv)
+	if password != "" {
+		return []byte(password), nil
+	}
+
 	var in, out *os.File
 	if runtime.GOOS == "windows" {
 		var err error