Remove DEL characters from password input

helper/password/password.go

@@ -8,6 +8,7 @@ import (
 	"io"
 	"os"
 	"os/signal"
+	"strings"
 )
 
 var ErrInterrupted = errors.New("interrupted")
@@ -34,7 +35,7 @@ func Read(f *os.File) (string, error) {
 	case <-ch:
 		return "", ErrInterrupted
 	case <-doneCh:
-		return result, resultErr
+		return removeiTermDelete(result), resultErr
 	}
 }
 
@@ -62,3 +63,7 @@ func readline(f *os.File) (string, error) {
 
 	return string(resultBuf), nil
 }
+
+func removeiTermDelete(input string) string {
+	return strings.TrimPrefix(input, "\x20\x7f")
+}

helper/password/password_test.go

@@ -0,0 +1,27 @@
+package password
+
+import "testing"
+
+type testCase struct {
+	name     string
+	input    string
+	expected string
+}
+
+func TestRemoveiTermDelete(t *testing.T) {
+	var tests = []testCase{
+		{"NoDelete", "TestingStuff", "TestingStuff"},
+		{"SingleDelete", "Testing\x7fStuff", "Testing\x7fStuff"},
+		{"DeleteFirst", "\x7fTestingStuff", "\x7fTestingStuff"},
+		{"DoubleDelete", "\x7f\x7fTestingStuff", "\x7f\x7fTestingStuff"},
+		{"SpaceFirst", "\x20TestingStuff", "\x20TestingStuff"},
+		{"iTermDelete", "\x20\x7fTestingStuff", "TestingStuff"},
+	}
+
+	for _, test := range tests {
+		result := removeiTermDelete(test.input)
+		if result != test.expected {
+			t.Errorf("Test %s failed, input: '%s', expected: '%s', output: '%s'", test.name, test.input, test.expected, result)
+		}
+	}
+}