From 1ae04c3850eb876c7f4d1956089741e747691b3a Mon Sep 17 00:00:00 2001
From: YuutaW <17158086+trumeet@users.noreply.github.com>
Date: Thu, 16 May 2019 16:03:24 -0700
Subject: refactor: remove #Anti-Crack

Signed-off-by: YuutaW <17158086+Trumeet@users.noreply.github.com>
---
 .../java/moe/yuuta/gplicense/AESObfuscator.java    | 94 ----------------------
 1 file changed, 94 deletions(-)
 delete mode 100644 app/src/main/java/moe/yuuta/gplicense/AESObfuscator.java

(limited to 'app/src/main/java/moe/yuuta/gplicense/AESObfuscator.java')

diff --git a/app/src/main/java/moe/yuuta/gplicense/AESObfuscator.java b/app/src/main/java/moe/yuuta/gplicense/AESObfuscator.java
deleted file mode 100644
index 7370f58..0000000
--- a/app/src/main/java/moe/yuuta/gplicense/AESObfuscator.java
+++ /dev/null
@@ -1,94 +0,0 @@
-package moe.yuuta.gplicense;
-
-import java.io.UnsupportedEncodingException;
-import java.security.GeneralSecurityException;
-import java.security.spec.KeySpec;
-
-import javax.crypto.BadPaddingException;
-import javax.crypto.Cipher;
-import javax.crypto.IllegalBlockSizeException;
-import javax.crypto.SecretKey;
-import javax.crypto.SecretKeyFactory;
-import javax.crypto.spec.IvParameterSpec;
-import javax.crypto.spec.PBEKeySpec;
-import javax.crypto.spec.SecretKeySpec;
-
-import moe.yuuta.gplicense.util.Base64;
-import moe.yuuta.gplicense.util.Base64DecoderException;
-
-/**
- * An Obfuscator that uses AES to encrypt data.
- */
-public class AESObfuscator implements Obfuscator {
-    private static final String UTF8 = "UTF-8";
-    private static final String KEYGEN_ALGORITHM = "PBEWITHSHAAND256BITAES-CBC-BC";
-    private static final String CIPHER_ALGORITHM = "AES/CBC/PKCS5Padding";
-    private static final byte[] IV =
-            {16, 74, 71, -80, 32, 101, -47, 72, 117, -14, 0, -29, 70, 65, -12, 74};
-    private static final String header = "moe.yuuta.workmode.AO-1|";
-
-    private Cipher mEncryptor;
-    private Cipher mDecryptor;
-
-    /**
-     * @param salt          an array of random bytes to use for each (un)obfuscation
-     * @param applicationId application identifier, e.g. the package name
-     * @param deviceId      device identifier. Use as many sources as possible to
-     *                      create this unique identifier.
-     */
-    public AESObfuscator(byte[] salt, String applicationId, String deviceId) {
-        try {
-            SecretKeyFactory factory = SecretKeyFactory.getInstance(KEYGEN_ALGORITHM);
-            KeySpec keySpec =
-                    new PBEKeySpec((applicationId + deviceId).toCharArray(), salt, 1024, 256);
-            SecretKey tmp = factory.generateSecret(keySpec);
-            SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "AES");
-            mEncryptor = Cipher.getInstance(CIPHER_ALGORITHM);
-            mEncryptor.init(Cipher.ENCRYPT_MODE, secret, new IvParameterSpec(IV));
-            mDecryptor = Cipher.getInstance(CIPHER_ALGORITHM);
-            mDecryptor.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(IV));
-        } catch (GeneralSecurityException e) {
-            // This can't happen on a compatible Android device.
-            throw new RuntimeException("Invalid environment", e);
-        }
-    }
-
-    public String obfuscate(String original, String key) {
-        if (original == null) {
-            return null;
-        }
-        try {
-            // Header is appended as an integrity check
-            return Base64.encode(mEncryptor.doFinal((header + key + original).getBytes(UTF8)));
-        } catch (UnsupportedEncodingException e) {
-            throw new RuntimeException("Invalid environment", e);
-        } catch (GeneralSecurityException e) {
-            throw new RuntimeException("Invalid environment", e);
-        }
-    }
-
-    public String unobfuscate(String obfuscated, String key) throws ValidationException {
-        if (obfuscated == null) {
-            return null;
-        }
-        try {
-            String result = new String(mDecryptor.doFinal(Base64.decode(obfuscated)), UTF8);
-            // Check for presence of header. This serves as a final integrity check, for cases
-            // where the block size is correct during decryption.
-            int headerIndex = result.indexOf(header + key);
-            if (headerIndex != 0) {
-                throw new ValidationException("Header not found (invalid data or key)" + ":" +
-                        obfuscated);
-            }
-            return result.substring(header.length() + key.length(), result.length());
-        } catch (Base64DecoderException e) {
-            throw new ValidationException(e.getMessage() + ":" + obfuscated);
-        } catch (IllegalBlockSizeException e) {
-            throw new ValidationException(e.getMessage() + ":" + obfuscated);
-        } catch (BadPaddingException e) {
-            throw new ValidationException(e.getMessage() + ":" + obfuscated);
-        } catch (UnsupportedEncodingException e) {
-            throw new RuntimeException("Invalid environment", e);
-        }
-    }
-}
\ No newline at end of file
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