2FA: Add generator for random 16-digit app passwords #808

Signed-off-by: Michael Mayer <michael@photoprism.app>

pkg/rnd/passcode.go

@@ -0,0 +1,14 @@
+package rnd
+
+// GeneratePasscode returns a random 16-digit passcode that can, for example, be used as an app password.
+// It is separated by 3 dashes for better readability, resulting in a total length of 19 characters.
+func GeneratePasscode() string {
+	code := make([]byte, 0, 19)
+	code = append(code, Base62(4)...)
+
+	for n := 0; n < 3; n++ {
+		code = append(code, "-"+Base62(4)...)
+	}
+
+	return string(code)
+}

pkg/rnd/passcode_test.go

@@ -0,0 +1,21 @@
+package rnd
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGeneratePasscode(t *testing.T) {
+	for n := 0; n < 10; n++ {
+		code := GeneratePasscode()
+		t.Logf("Passcode %d: %s", n, code)
+		assert.Equal(t, 19, len(code))
+	}
+}
+
+func BenchmarkGeneratePasscode(b *testing.B) {
+	for n := 0; n < b.N; n++ {
+		GeneratePasscode()
+	}
+}

pkg/rnd/passwd.go

@@ -1,6 +0,0 @@
-package rnd
-
-// GeneratePasswd returns a random password with 8 characters as string.
-func GeneratePasswd() string {
-	return GenerateToken(8)
-}

pkg/rnd/passwd_test.go

@@ -1,19 +0,0 @@
-package rnd
-
-import (
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestGeneratePasswd(t *testing.T) {
-	pw := GeneratePasswd()
-	t.Logf("password: %s", pw)
-	assert.Equal(t, 8, len(pw))
-}
-
-func BenchmarkGeneratePasswd(b *testing.B) {
-	for n := 0; n < b.N; n++ {
-		GeneratePasswd()
-	}
-}