1 files changed, 0 insertions, 161 deletions
diff --git a/app/src/main/java/com/wireguard/crypto/KeyEncoding.java b/app/src/main/java/com/wireguard/crypto/KeyEncoding.java
deleted file mode 100644
index d29c2d44..00000000
--- a/app/src/main/java/com/wireguard/crypto/KeyEncoding.java
+++ /dev/null
@@ -1,161 +0,0 @@
-/*
- * Copyright © 2017-2018 WireGuard LLC. All Rights Reserved.
- * SPDX-License-Identifier: Apache-2.0
- */
-
-package com.wireguard.crypto;
-
-import com.wireguard.android.Application;
-import com.wireguard.android.R;
-
-/**
- * This is a specialized constant-time base64 and hex implementation that resists side-channel attacks.
- */
-
-@SuppressWarnings("MagicNumber")
-public final class KeyEncoding {
-    public static final int KEY_LENGTH = 32;
-    public static final int KEY_LENGTH_BASE64 = 44;
-    public static final int KEY_LENGTH_HEX = 64;
-    private static final String KEY_LENGTH_BASE64_EXCEPTION_MESSAGE =
-            Application.get().getString(R.string.key_length_base64_exception_message);
-    private static final String KEY_LENGTH_EXCEPTION_MESSAGE =
-            Application.get().getString(R.string.key_length_exception_message);
-    private static final String KEY_LENGTH_HEX_EXCEPTION_MESSAGE =
-            Application.get().getString(R.string.key_length_hex_exception_message);
-
-    private KeyEncoding() {
-        // Prevent instantiation.
-    }
-
-    private static int decodeBase64(final char[] src, final int srcOffset) {
-        int val = 0;
-        for (int i = 0; i < 4; ++i) {
-            final char c = src[i + srcOffset];
-            val |= (-1
-                    + ((((('A' - 1) - c) & (c - ('Z' + 1))) >>> 8) & (c - 64))
-                    + ((((('a' - 1) - c) & (c - ('z' + 1))) >>> 8) & (c - 70))
-                    + ((((('0' - 1) - c) & (c - ('9' + 1))) >>> 8) & (c + 5))
-                    + ((((('+' - 1) - c) & (c - ('+' + 1))) >>> 8) & 63)
-                    + ((((('/' - 1) - c) & (c - ('/' + 1))) >>> 8) & 64)
-            ) << (18 - 6 * i);
-        }
-        return val;
-    }
-
-    private static void encodeBase64(final byte[] src, final int srcOffset,
-                                     final char[] dest, final int destOffset) {
-        final byte[] input = {
-                (byte) ((src[srcOffset] >>> 2) & 63),
-                (byte) ((src[srcOffset] << 4 | ((src[1 + srcOffset] & 0xff) >>> 4)) & 63),
-                (byte) ((src[1 + srcOffset] << 2 | ((src[2 + srcOffset] & 0xff) >>> 6)) & 63),
-                (byte) ((src[2 + srcOffset]) & 63),
-        };
-        for (int i = 0; i < 4; ++i) {
-            dest[i + destOffset] = (char) (input[i] + 'A'
-                    + (((25 - input[i]) >>> 8) & 6)
-                    - (((51 - input[i]) >>> 8) & 75)
-                    - (((61 - input[i]) >>> 8) & 15)
-                    + (((62 - input[i]) >>> 8) & 3));
-        }
-    }
-
-    public static byte[] keyFromBase64(final String str) {
-        final char[] input = str.toCharArray();
-        final byte[] key = new byte[KEY_LENGTH];
-        if (input.length != KEY_LENGTH_BASE64 || input[KEY_LENGTH_BASE64 - 1] != '=')
-            throw new IllegalArgumentException(KEY_LENGTH_BASE64_EXCEPTION_MESSAGE);
-        int i;
-        int ret = 0;
-        for (i = 0; i < KEY_LENGTH / 3; ++i) {
-            final int val = decodeBase64(input, i * 4);
-            ret |= val >>> 31;
-            key[i * 3] = (byte) ((val >>> 16) & 0xff);
-            key[i * 3 + 1] = (byte) ((val >>> 8) & 0xff);
-            key[i * 3 + 2] = (byte) (val & 0xff);
-        }
-        final char[] endSegment = {
-                input[i * 4],
-                input[i * 4 + 1],
-                input[i * 4 + 2],
-                'A',
-        };
-        final int val = decodeBase64(endSegment, 0);
-        ret |= (val >>> 31) | (val & 0xff);
-        key[i * 3] = (byte) ((val >>> 16) & 0xff);
-        key[i * 3 + 1] = (byte) ((val >>> 8) & 0xff);
-
-        if (ret != 0)
-            throw new IllegalArgumentException(KEY_LENGTH_BASE64_EXCEPTION_MESSAGE);
-        return key;
-    }
-
-    public static byte[] keyFromHex(final String str) {
-        final char[] input = str.toCharArray();
-        final byte[] key = new byte[KEY_LENGTH];
-        if (input.length != KEY_LENGTH_HEX)
-            throw new IllegalArgumentException(KEY_LENGTH_HEX_EXCEPTION_MESSAGE);
-        int ret = 0;
-
-        for (int i = 0; i < KEY_LENGTH_HEX; i += 2) {
-            int c;
-            int cNum;
-            int cNum0;
-            int cAlpha;
-            int cAlpha0;
-            int cVal;
-            final int cAcc;
-
-            c = input[i];
-            cNum = c ^ 48;
-            cNum0 = ((cNum - 10) >>> 8) & 0xff;
-            cAlpha = (c & ~32) - 55;
-            cAlpha0 = (((cAlpha - 10) ^ (cAlpha - 16)) >>> 8) & 0xff;
-            ret |= ((cNum0 | cAlpha0) - 1) >>> 8;
-            cVal = (cNum0 & cNum) | (cAlpha0 & cAlpha);
-            cAcc = cVal * 16;
-
-            c = input[i + 1];
-            cNum = c ^ 48;
-            cNum0 = ((cNum - 10) >>> 8) & 0xff;
-            cAlpha = (c & ~32) - 55;
-            cAlpha0 = (((cAlpha - 10) ^ (cAlpha - 16)) >>> 8) & 0xff;
-            ret |= ((cNum0 | cAlpha0) - 1) >>> 8;
-            cVal = (cNum0 & cNum) | (cAlpha0 & cAlpha);
-            key[i / 2] = (byte) (cAcc | cVal);
-        }
-        if (ret != 0)
-            throw new IllegalArgumentException(KEY_LENGTH_HEX_EXCEPTION_MESSAGE);
-        return key;
-    }
-
-    public static String keyToBase64(final byte[] key) {
-        final char[] output = new char[KEY_LENGTH_BASE64];
-        if (key.length != KEY_LENGTH)
-            throw new IllegalArgumentException(KEY_LENGTH_EXCEPTION_MESSAGE);
-        int i;
-        for (i = 0; i < KEY_LENGTH / 3; ++i)
-            encodeBase64(key, i * 3, output, i * 4);
-        final byte[] endSegment = {
-                key[i * 3],
-                key[i * 3 + 1],
-                0,
-        };
-        encodeBase64(endSegment, 0, output, i * 4);
-        output[KEY_LENGTH_BASE64 - 1] = '=';
-        return new String(output);
-    }
-
-    public static String keyToHex(final byte[] key) {
-        final char[] output = new char[KEY_LENGTH_HEX];
-        if (key.length != KEY_LENGTH)
-            throw new IllegalArgumentException(KEY_LENGTH_EXCEPTION_MESSAGE);
-        for (int i = 0; i < KEY_LENGTH; ++i) {
-            output[i * 2] = (char) (87 + (key[i] >> 4 & 0xf)
-                    + ((((key[i] >> 4 & 0xf) - 10) >> 8) & ~38));
-            output[i * 2 + 1] = (char) (87 + (key[i] & 0xf)
-                    + ((((key[i] & 0xf) - 10) >> 8) & ~38));
-        }
-        return new String(output);
-    }
-}