readpassword: create internal package for password reading

* Supports stdin
* Add tests for extpass and stdin

As per user request at https://github.com/rfjakob/gocryptfs/issues/30

1 files changed, 55 insertions, 0 deletions

diff --git a/internal/readpassword/extpass_test.go b/internal/readpassword/extpass_test.go
new file mode 100644
index 0000000..6eda142
--- /dev/null
+++ b/internal/readpassword/extpass_test.go
@@ -0,0 +1,55 @@
+package readpassword
+
+import (
+	"os"
+	"os/exec"
+	"testing"
+
+	"github.com/rfjakob/gocryptfs/internal/toggledlog"
+)
+
+func TestMain(m *testing.M) {
+	// Shut up info output
+	toggledlog.Info.Enabled = false
+	m.Run()
+}
+
+func TestExtpass(t *testing.T) {
+	p1 := "ads2q4tw41reg52"
+	p2 := readPasswordExtpass("echo " + p1)
+	if p1 != p2 {
+		t.Errorf("p1=%q != p2=%q", p1, p2)
+	}
+}
+
+func TestOnceExtpass(t *testing.T) {
+	p1 := "lkadsf0923rdfi48rqwhdsf"
+	p2 := Once("echo " + p1)
+	if p1 != p2 {
+		t.Errorf("p1=%q != p2=%q", p1, p2)
+	}
+}
+
+func TestTwiceExtpass(t *testing.T) {
+	p1 := "w5w44t3wfe45srz434"
+	p2 := Once("echo " + p1)
+	if p1 != p2 {
+		t.Errorf("p1=%q != p2=%q", p1, p2)
+	}
+}
+
+// When extpass returns an empty string, we should crash.
+// https://talks.golang.org/2014/testing.slide#23
+func TestExtpassEmpty(t *testing.T) {
+	if os.Getenv("TEST_SLAVE") == "1" {
+		readPasswordExtpass("echo")
+		return
+	}
+	cmd := exec.Command(os.Args[0], "-test.run=TestExtpassEmpty$")
+	cmd.Env = append(os.Environ(), "TEST_SLAVE=1")
+	err := cmd.Run()
+	if err != nil {
+		return
+	}
+	t.Fatal("empty password should have failed")
+}