cryptutil: move to pkg dir, add token generator (#1029)

* cryptutil: move to pkg dir, add token generator

* add gitignored files

* add tests

pkg/cryptutil/token_test.go

@@ -0,0 +1,64 @@
+package cryptutil
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/google/uuid"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestToken_String(t *testing.T) {
+	v, _ := uuid.Parse("4aa29ffe-d802-4990-9be6-6adb4cd7af59")
+	tok := Token(v)
+	assert.Equal(t, "ADYZhBgVmT5Phd31hszpHN", tok.String())
+}
+
+func TestToken_UUID(t *testing.T) {
+	v, _ := uuid.Parse("4aa29ffe-d802-4990-9be6-6adb4cd7af59")
+	tok := Token(v)
+	assert.Equal(t, v, tok.UUID())
+}
+
+func TestTokenFromString(t *testing.T) {
+	v, _ := uuid.Parse("4aa29ffe-d802-4990-9be6-6adb4cd7af59")
+	tok1 := Token(v)
+	tok2, ok := TokenFromString("ADYZhBgVmT5Phd31hszpHN")
+	assert.True(t, ok)
+	assert.Equal(t, tok1, tok2)
+
+	t.Run("invalid", func(t *testing.T) {
+		_, ok := TokenFromString("<<<NOT VALID>>>")
+		assert.False(t, ok)
+	})
+}
+
+func TestNewRandomToken(t *testing.T) {
+	uuid.SetRand(strings.NewReader("1111111111111111111111111111111"))
+	defer uuid.SetRand(nil)
+
+	tok := NewRandomToken()
+	assert.Equal(t, "75KUW8tPVJWUnXBaApZfPE", tok.String())
+}
+
+func TestSecretToken_String(t *testing.T) {
+	v1, _ := uuid.Parse("fb297629-e61f-4f1d-bb7e-ece3ed702098")
+	v2, _ := uuid.Parse("047fb3ad-b1c7-463b-b16c-e41836811cc2")
+	actual := SecretToken{
+		ID:     Token(v1),
+		Secret: Token(v2),
+	}.String()
+	assert.Equal(t, "HuS14FdpunfDzMWTwxzuXN5vqHf4H8bAqbwbo98onbjo", actual)
+
+	t.Run("invalid", func(t *testing.T) {
+		_, ok := SecretTokenFromString("<<<NOT VALID>>>")
+		assert.False(t, ok)
+	})
+}
+
+func TestSecretTokenFromString(t *testing.T) {
+	tok, ok := SecretTokenFromString("HuS14FdpunfDzMWTwxzuXN5vqHf4H8bAqbwbo98onbjo")
+	assert.True(t, ok)
+	assert.Equal(t, "fb297629-e61f-4f1d-bb7e-ece3ed702098", tok.ID.UUID().String())
+	assert.Equal(t, "047fb3ad-b1c7-463b-b16c-e41836811cc2", tok.Secret.UUID().String())
+}