Remove HOTP/TOTP support (#806)

1 files changed, 0 insertions, 63 deletions

diff --git a/app/src/main/java/com/zeapo/pwdstore/utils/Otp.java b/app/src/main/java/com/zeapo/pwdstore/utils/Otp.java
deleted file mode 100644
index 07f73423..00000000
--- a/app/src/main/java/com/zeapo/pwdstore/utils/Otp.java
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * Copyright © 2014-2020 The Android Password Store Authors. All Rights Reserved.
- * SPDX-License-Identifier: GPL-3.0-only
- */
-package com.zeapo.pwdstore.utils;
-
-import org.apache.commons.codec.binary.Base32;
-
-import java.math.BigInteger;
-import java.nio.ByteBuffer;
-import java.security.InvalidKeyException;
-import java.security.NoSuchAlgorithmException;
-import java.util.Arrays;
-
-import javax.crypto.Mac;
-import javax.crypto.spec.SecretKeySpec;
-
-import timber.log.Timber;
-
-public class Otp {
-
-    private static final Base32 BASE_32 = new Base32();
-
-    private Otp() {
-    }
-
-    public static String calculateCode(
-        String secret, long counter, String algorithm, String digits) {
-        String[] steam = {
-            "2", "3", "4", "5", "6", "7", "8", "9", "B", "C", "D", "F", "G", "H", "J", "K", "M",
-            "N", "P", "Q", "R", "T", "V", "W", "X", "Y"
-        };
-        String ALGORITHM = "Hmac" + algorithm.toUpperCase();
-        SecretKeySpec signingKey = new SecretKeySpec(BASE_32.decode(secret), ALGORITHM);
-
-        Mac mac;
-        try {
-            mac = Mac.getInstance(ALGORITHM);
-            mac.init(signingKey);
-        } catch (NoSuchAlgorithmException e) {
-            Timber.tag("TOTP").e(e, "%s unavailable - should never happen", ALGORITHM);
-            return null;
-        } catch (InvalidKeyException e) {
-            Timber.tag("TOTP").e(e, "Key is malformed");
-            return null;
-        }
-
-        byte[] digest = mac.doFinal(ByteBuffer.allocate(8).putLong(counter).array());
-        int offset = digest[digest.length - 1] & 0xf;
-        byte[] code = Arrays.copyOfRange(digest, offset, offset + 4);
-        code[0] = (byte) (0x7f & code[0]);
-        String strCode = new BigInteger(code).toString();
-        if (digits.equals("s")) {
-            StringBuilder output = new StringBuilder();
-            int bigInt = new BigInteger(code).intValue();
-            for (int i = 0; i != 5; i++) {
-                output.append(steam[bigInt % 26]);
-                bigInt /= 26;
-            }
-            return output.toString();
-        } else return strCode.substring(strCode.length() - Integer.parseInt(digits));
-    }
-}