format-common: initial API for PasswordEntry

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

2 files changed, 100 insertions, 0 deletions

diff --git a/format-common/src/test/kotlin/dev/msfjarvis/aps/util/time/TestClocks.kt b/format-common/src/test/kotlin/dev/msfjarvis/aps/util/time/TestClocks.kt
new file mode 100644
index 00000000..d75cc900
--- /dev/null
+++ b/format-common/src/test/kotlin/dev/msfjarvis/aps/util/time/TestClocks.kt
@@ -0,0 +1,27 @@
+/*
+ * Copyright © 2014-2021 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+package dev.msfjarvis.aps.util.time
+
+import java.time.Clock
+import java.time.Instant
+import java.time.ZoneId
+import java.time.ZoneOffset.UTC
+
+/**
+ * Implementation of [UserClock] that is fixed to [Instant.EPOCH] for deterministic time-based tests
+ */
+internal class TestUserClock(instant: Instant) : UserClock() {
+
+  constructor() : this(Instant.EPOCH)
+
+  private var clock = fixed(instant, UTC)
+
+  override fun withZone(zone: ZoneId): Clock = clock.withZone(zone)
+
+  override fun getZone(): ZoneId = UTC
+
+  override fun instant(): Instant = clock.instant()
+}
diff --git a/format-common/src/test/kotlin/dev/msfjarvis/aps/util/totp/OtpTest.kt b/format-common/src/test/kotlin/dev/msfjarvis/aps/util/totp/OtpTest.kt
new file mode 100644
index 00000000..e6dc372d
--- /dev/null
+++ b/format-common/src/test/kotlin/dev/msfjarvis/aps/util/totp/OtpTest.kt
@@ -0,0 +1,73 @@
+/*
+ * Copyright © 2014-2021 The Android Password Store Authors. All Rights Reserved.
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+package dev.msfjarvis.aps.util.totp
+
+import com.github.michaelbull.result.get
+import kotlin.test.assertEquals
+import kotlin.test.assertNotNull
+import kotlin.test.assertNull
+import org.junit.Test
+
+internal class OtpTest {
+
+  @Test
+  fun testOtpGeneration6Digits() {
+    assertEquals("953550", Otp.calculateCode("JBSWY3DPEHPK3PXP", 1593333298159 / (1000 * 30), "SHA1", "6").get())
+    assertEquals("275379", Otp.calculateCode("JBSWY3DPEHPK3PXP", 1593333571918 / (1000 * 30), "SHA1", "6").get())
+    assertEquals("867507", Otp.calculateCode("JBSWY3DPEHPK3PXP", 1593333600517 / (1000 * 57), "SHA1", "6").get())
+  }
+
+  @Test
+  fun testOtpGeneration10Digits() {
+    assertEquals("0740900914", Otp.calculateCode("JBSWY3DPEHPK3PXP", 1593333655044 / (1000 * 30), "SHA1", "10").get())
+    assertEquals("0070632029", Otp.calculateCode("JBSWY3DPEHPK3PXP", 1593333691405 / (1000 * 30), "SHA1", "10").get())
+    assertEquals("1017265882", Otp.calculateCode("JBSWY3DPEHPK3PXP", 1593333728893 / (1000 * 83), "SHA1", "10").get())
+  }
+
+  @Test
+  fun testOtpGenerationIllegalInput() {
+    assertNull(Otp.calculateCode("JBSWY3DPEHPK3PXP", 10000, "SHA0", "10").get())
+    assertNull(Otp.calculateCode("JBSWY3DPEHPK3PXP", 10000, "SHA1", "a").get())
+    assertNull(Otp.calculateCode("JBSWY3DPEHPK3PXP", 10000, "SHA1", "5").get())
+    assertNull(Otp.calculateCode("JBSWY3DPEHPK3PXP", 10000, "SHA1", "11").get())
+    assertNull(Otp.calculateCode("JBSWY3DPEHPK3PXPAAAAB", 10000, "SHA1", "6").get())
+  }
+
+  @Test
+  fun testOtpGenerationUnusualSecrets() {
+    assertEquals(
+      "127764",
+      Otp.calculateCode("JBSWY3DPEHPK3PXPAAAAAAAA", 1593367111963 / (1000 * 30), "SHA1", "6").get()
+    )
+    assertEquals("047515", Otp.calculateCode("JBSWY3DPEHPK3PXPAAAAA", 1593367171420 / (1000 * 30), "SHA1", "6").get())
+  }
+
+  @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"
+        )
+        .get()
+    val paddedOtp =
+      Otp.calculateCode(
+          "ON2HE2LOM4QHO2LUNAQHG33NMUQHAYLEMRUW4ZZANZSWKZDFMQFA====",
+          1593367171420 / (1000 * 30),
+          "SHA1",
+          "6"
+        )
+        .get()
+    assertNotNull(unpaddedOtp)
+    assertNotNull(paddedOtp)
+    assertEquals(unpaddedOtp, paddedOtp)
+  }
+}