app: switch to format-common's PasswordEntry

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

1 files changed, 0 insertions, 74 deletions

diff --git a/app/src/main/java/dev/msfjarvis/aps/util/totp/Otp.kt b/app/src/main/java/dev/msfjarvis/aps/util/totp/Otp.kt
deleted file mode 100644
index 1ef155a5..00000000
--- a/app/src/main/java/dev/msfjarvis/aps/util/totp/Otp.kt
+++ /dev/null
@@ -1,74 +0,0 @@
-/*
- * 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.Err
-import com.github.michaelbull.result.runCatching
-import java.nio.ByteBuffer
-import java.util.Locale
-import javax.crypto.Mac
-import javax.crypto.spec.SecretKeySpec
-import kotlin.experimental.and
-import org.apache.commons.codec.binary.Base32
-
-object Otp {
-
-  private val BASE_32 = Base32()
-  private val STEAM_ALPHABET = "23456789BCDFGHJKMNPQRTVWXY".toCharArray()
-
-  init {
-    check(STEAM_ALPHABET.size == 26)
-  }
-
-  fun calculateCode(secret: String, counter: Long, algorithm: String, digits: String) = runCatching {
-    val algo = "Hmac${algorithm.toUpperCase(Locale.ROOT)}"
-    val decodedSecret = BASE_32.decode(secret)
-    val secretKey = SecretKeySpec(decodedSecret, algo)
-    val digest =
-      Mac.getInstance(algo).run {
-        init(secretKey)
-        doFinal(ByteBuffer.allocate(8).putLong(counter).array())
-      }
-    // Least significant 4 bits are used as an offset into the digest.
-    val offset = (digest.last() and 0xf).toInt()
-    // Extract 32 bits at the offset and clear the most significant bit.
-    val code = digest.copyOfRange(offset, offset + 4)
-    code[0] = (0x7f and code[0].toInt()).toByte()
-    val codeInt = ByteBuffer.wrap(code).int
-    check(codeInt > 0)
-    if (digits == "s") {
-      // Steam
-      var remainingCodeInt = codeInt
-      buildString {
-        repeat(5) {
-          append(STEAM_ALPHABET[remainingCodeInt % 26])
-          remainingCodeInt /= 26
-        }
-      }
-    } else {
-      // Base 10, 6 to 10 digits
-      val numDigits = digits.toIntOrNull()
-      when {
-        numDigits == null -> {
-          return Err(IllegalArgumentException("Digits specifier has to be either 's' or numeric"))
-        }
-        numDigits < 6 -> {
-          return Err(IllegalArgumentException("TOTP codes have to be at least 6 digits long"))
-        }
-        numDigits > 10 -> {
-          return Err(IllegalArgumentException("TOTP codes can be at most 10 digits long"))
-        }
-        else -> {
-          // 2^31 = 2_147_483_648, so we can extract at most 10 digits with the first one
-          // always being 0, 1, or 2. Pad with leading zeroes.
-          val codeStringBase10 = codeInt.toString(10).padStart(10, '0')
-          check(codeStringBase10.length == 10)
-          codeStringBase10.takeLast(numDigits)
-        }
-      }
-    }
-  }
-}