Reintroduce TOTP support (#890)

Co-authored-by: Fabian Henneke <fabian@henneke.me>

1 files changed, 50 insertions, 0 deletions

diff --git a/app/src/test/java/com/zeapo/pwdstore/utils/OtpTest.kt b/app/src/test/java/com/zeapo/pwdstore/utils/OtpTest.kt
new file mode 100644
index 00000000..710b0845
--- /dev/null
+++ b/app/src/test/java/com/zeapo/pwdstore/utils/OtpTest.kt
@@ -0,0 +1,50 @@
+package com.zeapo.pwdstore.utils
+
+import org.junit.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertNotNull
+import kotlin.test.assertNull
+
+class OtpTest {
+
+    @Test
+    fun testOtpGeneration6Digits() {
+        assertEquals("953550", Otp.calculateCode("JBSWY3DPEHPK3PXP", 1593333298159 / (1000 * 30), "SHA1", "6"))
+        assertEquals("275379", Otp.calculateCode("JBSWY3DPEHPK3PXP", 1593333571918 / (1000 * 30), "SHA1", "6"))
+        assertEquals("867507", Otp.calculateCode("JBSWY3DPEHPK3PXP", 1593333600517 / (1000 * 57), "SHA1", "6"))
+    }
+
+    @Test
+    fun testOtpGeneration10Digits() {
+        assertEquals("0740900914", Otp.calculateCode("JBSWY3DPEHPK3PXP", 1593333655044 / (1000 * 30), "SHA1", "10"))
+        assertEquals("0070632029", Otp.calculateCode("JBSWY3DPEHPK3PXP", 1593333691405 / (1000 * 30), "SHA1", "10"))
+        assertEquals("1017265882", Otp.calculateCode("JBSWY3DPEHPK3PXP", 1593333728893 / (1000 * 83), "SHA1", "10"))
+    }
+
+    @Test
+    fun testOtpGenerationIllegalInput() {
+        assertNull(Otp.calculateCode("JBSWY3DPEHPK3PXP", 10000, "SHA0", "10"))
+        assertNull(Otp.calculateCode("JBSWY3DPEHPK3PXP", 10000, "SHA1", "a"))
+        assertNull(Otp.calculateCode("JBSWY3DPEHPK3PXP", 10000, "SHA1", "5"))
+        assertNull(Otp.calculateCode("JBSWY3DPEHPK3PXP", 10000, "SHA1", "11"))
+        assertNull(Otp.calculateCode("JBSWY3DPEHPK3PXPAAAAB", 10000, "SHA1", "6"))
+    }
+
+    @Test
+    fun testOtpGenerationUnusualSecrets() {
+        assertEquals("127764", Otp.calculateCode("JBSWY3DPEHPK3PXPAAAAAAAA", 1593367111963 / (1000 * 30), "SHA1", "6"))
+        assertEquals("047515", Otp.calculateCode("JBSWY3DPEHPK3PXPAAAAA", 1593367171420 / (1000 * 30), "SHA1", "6"))
+    }
+
+    @Test
+    fun testOtpGenerationUnpaddedSecrets() {
+        // Secret was generated with `echo 'string with some padding needed' | base32`
+        // We don't care for the resultant OTP's actual value, we just want both the padded and
+        // unpadded variant to generate the same one.
+        val unpaddedOtp = Otp.calculateCode("ON2HE2LOM4QHO2LUNAQHG33NMUQHAYLEMRUW4ZZANZSWKZDFMQFA", 1593367171420 / (1000 * 30), "SHA1", "6")
+        val paddedOtp = Otp.calculateCode("ON2HE2LOM4QHO2LUNAQHG33NMUQHAYLEMRUW4ZZANZSWKZDFMQFA====", 1593367171420 / (1000 * 30), "SHA1", "6")
+        assertNotNull(unpaddedOtp)
+        assertNotNull(paddedOtp)
+        assertEquals(unpaddedOtp, paddedOtp)
+    }
+}