Android#

1
public class MainActivity extends Activity {
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    private void a(String str) {
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        AlertDialog create = new AlertDialog.Builder(this).create();
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        create.setTitle(str);
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        create.setMessage("This is unacceptable. The app is now going to exit.");
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        create.setButton(-3, "OK", new DialogInterface.OnClickListener() { // from class: sg.vantagepoint.uncrackable1.MainActivity.1
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            @Override // android.content.DialogInterface.OnClickListener
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            public void onClick(DialogInterface dialogInterface, int i) {
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                System.exit(0);
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            }
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        });
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        create.setCancelable(false);
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        create.show();
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    }
15

16
    @Override // android.app.Activity
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    protected void onCreate(Bundle bundle) {
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        if (c.a() || c.b() || c.c()) {
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            a("Root detected!");
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        }
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        if (b.a(getApplicationContext())) {
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            a("App is debuggable!");
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        }
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        super.onCreate(bundle);
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        setContentView(R.layout.activity_main);
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    }
27

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    public void verify(View view) {
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        String str;
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        String obj = ((EditText) findViewById(R.id.edit_text)).getText().toString();
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        AlertDialog create = new AlertDialog.Builder(this).create();
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        if (a.a(obj)) {
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            create.setTitle("Success!");
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            str = "This is the correct secret.";
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        } else {
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            create.setTitle("Nope...");
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            str = "That's not it. Try again.";
38
        }
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        create.setMessage(str);
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        create.setButton(-3, "OK", new DialogInterface.OnClickListener() { // from class: sg.vantagepoint.uncrackable1.MainActivity.2
41
            @Override // android.content.DialogInterface.OnClickListener
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            public void onClick(DialogInterface dialogInterface, int i) {
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                dialogInterface.dismiss();
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            }
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        });
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        create.show();
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    }
48
}

1
if (a.a(obj)) {
2
    create.setTitle("Success!");
3
    str = "This is the correct secret.";
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} else {
5
    create.setTitle("Nope...");
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    str = "That's not it. Try again.";
7
}

1
public class a {
2
    public static boolean a(String str) {
3
        byte[] bArr;
4
        byte[] bArr2 = new byte[0];
5
        try {
6
            bArr = sg.vantagepoint.a.a.a(b("8d127684cbc37c17616d806cf50473cc"), Base64.decode("5UJiFctbmgbDoLXmpL12mkno8HT4Lv8dlat8FxR2GOc=", 0));
7
        } catch (Exception e) {
8
            Log.d("CodeCheck", "AES error:" + e.getMessage());
9
            bArr = bArr2;
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        }
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        return str.equals(new String(bArr));
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    }
13

14
    public static byte[] b(String str) {
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        int length = str.length();
16
        byte[] bArr = new byte[length / 2];
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        for (int i = 0; i < length; i += 2) {
18
            bArr[i / 2] = (byte) ((Character.digit(str.charAt(i), 16) << 4) + Character.digit(str.charAt(i + 1), 16));
19
        }
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        return bArr;
21
    }
22
}

1
public class a {
2
    public static byte[] a(byte[] bArr, byte[] bArr2) {
3
        SecretKeySpec secretKeySpec = new SecretKeySpec(bArr, "AES/ECB/PKCS7Padding");
4
        Cipher cipher = Cipher.getInstance("AES");
5
        cipher.init(2, secretKeySpec);
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        return cipher.doFinal(bArr2);
7
    }
8
}

1
from Crypto.Cipher import AES
2
import base64
3

4
key = bytes.fromhex("8d127684cbc37c17616d806cf50473cc")
5
ciphertext = base64.b64decode("5UJiFctbmgbDoLXmpL12mkno8HT4Lv8dlat8FxR2GOc=")
6

7
cipher = AES.new(key, AES.MODE_ECB)
8
plaintext = cipher.decrypt(ciphertext)
9
print(plaintext.decode("utf-8"))

1
public class MainActivity extends c {
2
    private CodeCheck m;
3

4
    static {
5
        System.loadLibrary("foo");
6
    }
7

8
    /* JADX INFO: Access modifiers changed from: private */
9
    public void a(String str) {
10
        AlertDialog create = new AlertDialog.Builder(this).create();
11
        create.setTitle(str);
12
        create.setMessage("This is unacceptable. The app is now going to exit.");
13
        create.setButton(-3, "OK", new DialogInterface.OnClickListener() { // from class: sg.vantagepoint.uncrackable2.MainActivity.1
14
            @Override // android.content.DialogInterface.OnClickListener
15
            public void onClick(DialogInterface dialogInterface, int i) {
16
                System.exit(0);
17
            }
18
        });
19
        create.setCancelable(false);
20
        create.show();
21
    }
22

23
    private native void init();
24

25
    /* JADX WARN: Type inference failed for: r0v4, types: [sg.vantagepoint.uncrackable2.MainActivity$2] */
26
    @Override // android.support.v7.app.c, android.support.v4.app.h, android.support.v4.app.z, android.app.Activity
27
    protected void onCreate(Bundle bundle) {
28
        init();
29
        if (b.a() || b.b() || b.c()) {
30
            a("Root detected!");
31
        }
32
        if (a.a(getApplicationContext())) {
33
            a("App is debuggable!");
34
        }
35
        new AsyncTask<Void, String, String>() { // from class: sg.vantagepoint.uncrackable2.MainActivity.2
36
            /* JADX INFO: Access modifiers changed from: protected */
37
            @Override // android.os.AsyncTask
38
            /* renamed from: a, reason: merged with bridge method [inline-methods] */
39
            public String doInBackground(Void... voidArr) {
40
                while (!Debug.isDebuggerConnected()) {
41
                    SystemClock.sleep(100L);
42
                }
43
                return null;
44
            }
45

46
            /* JADX INFO: Access modifiers changed from: protected */
47
            @Override // android.os.AsyncTask
48
            /* renamed from: a, reason: merged with bridge method [inline-methods] */
49
            public void onPostExecute(String str) {
50
                MainActivity.this.a("Debugger detected!");
51
            }
52
        }.execute(null, null, null);
53
        this.m = new CodeCheck();
54
        super.onCreate(bundle);
55
        setContentView(R.layout.activity_main);
56
    }
57

58
    public void verify(View view) {
59
        String str;
60
        String obj = ((EditText) findViewById(R.id.edit_text)).getText().toString();
61
        AlertDialog create = new AlertDialog.Builder(this).create();
62
        if (this.m.a(obj)) {
63
            create.setTitle("Success!");
64
            str = "This is the correct secret.";
65
        } else {
66
            create.setTitle("Nope...");
67
            str = "That's not it. Try again.";
68
        }
69
        create.setMessage(str);
70
        create.setButton(-3, "OK", new DialogInterface.OnClickListener() { // from class: sg.vantagepoint.uncrackable2.MainActivity.3
71
            @Override // android.content.DialogInterface.OnClickListener
72
            public void onClick(DialogInterface dialogInterface, int i) {
73
                dialogInterface.dismiss();
74
            }
75
        });
76
        create.show();
77
    }
78
}

1
public class CodeCheck {
2
    private native boolean bar(byte[] bArr);
3

4
    public boolean a(String str) {
5
        return bar(str.getBytes());
6
    }
7
}

1
undefined8
2
Java_sg_vantagepoint_uncrackable2_CodeCheck_bar(long *param_1,undefined8 param_2,undefined8 param_3)
3

4
{
5
  int iVar1;
6
  char *__s1;
7
  undefined4 extraout_var;
8
  undefined8 uVar2;
9
  long in_FS_OFFSET;
10
  char local_38 [24];
11
  long local_20;
12

13
  local_20 = *(long *)(in_FS_OFFSET + 0x28);
14
  if (DAT_0010400c == '\x01') {
15
    builtin_strncpy(local_38,"Thanks for all the fish",0x18);
16
    __s1 = (char *)(**(code **)(*param_1 + 0x5c0))(param_1,param_3,0);
17
    iVar1 = (**(code **)(*param_1 + 0x558))(param_1,param_3);
18
    if (iVar1 == 0x17) {
19
      iVar1 = strncmp(__s1,local_38,0x17);
20
      if (iVar1 == 0) {
21
        uVar2 = CONCAT71((int7)(CONCAT44(extraout_var,iVar1) >> 8),1);
22
        goto LAB_0010119c;
23
      }
24
    }
25
  }
26
  uVar2 = 0;
27
LAB_0010119c:
28
  if (*(long *)(in_FS_OFFSET + 0x28) == local_20) {
29
    return uVar2;
30
  }
31
                    /* WARNING: Subroutine does not return */
32
  __stack_chk_fail();
33
}