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1public class MainActivity extends AppCompatActivity {
2    public static final String ALGORITHM = "AES";
3    public static final String CHAR_SET = "UTF-8";
4    public static final String SECURE_RANDOM_ALGORITHM = "SHA1PRNG";
5    private byte[] bytes;
6    private Cipher cipher = null;
7    private byte[] encodeBytes;
8    private EditText etEnterString;
9    private byte[] privateKey;
10    private SecretKey secretKey;
11    private TextView txDecryptString;
12    private TextView txEncryptString;
13
14    /* JADX INFO: used method not loaded: androidx.appcompat.app.AppCompatActivity.setContentView(int):null, types can be incorrect */
15    /* access modifiers changed from: protected */
16    public void onCreate(Bundle savedInstanceState) {
17        super.onCreate(savedInstanceState);
18        setContentView((int) R.layout.activity_main);
19        extraAdded();
20        init();
21    }
22
23    private void extraAdded() {
24        try {
25            this.privateKey = generateKey();
26        } catch (NoSuchAlgorithmException e) {
27            e.printStackTrace();
28        }
29    }
30
31    private void init() {
32        this.etEnterString = (EditText) findViewById(R.id.etEnterString);
33        this.txEncryptString = (TextView) findViewById(R.id.txEncryptString);
34        this.txDecryptString = (TextView) findViewById(R.id.txDecryptString);
35    }
36
37    public void onClick(View view) {
38        switch (view.getId()) {
39            case R.id.btnDecryptString /*2131165250*/:
40                decryptData();
41                return;
42            case R.id.btnEncryptString /*2131165251*/:
43                encryptData();
44                return;
45            default:
46                return;
47        }
48    }
49
50    private void encryptData() {
51        if (this.etEnterString.getText().toString().trim().length() != 0) {
52            try {
53                this.encodeBytes = encrypt(this.privateKey, this.etEnterString.getText().toString().getBytes());
54                this.txEncryptString.setText(new String(this.encodeBytes));
55            } catch (Exception e) {
56                e.printStackTrace();
57            }
58        } else {
59            Toast.makeText(this, "Enter String value", 0).show();
60        }
61    }
62
63    private void decryptData() {
64        if (this.txEncryptString.getText().toString().trim().length() != 0) {
65            try {
66                this.txDecryptString.setText(new String(decrypt(this.privateKey, this.encodeBytes)));
67            } catch (Exception e) {
68                e.printStackTrace();
69            }
70        } else {
71            Toast.makeText(this, "first encrypt your string", 0).show();
72        }
73    }
74
75    private byte[] generateKey() throws NoSuchAlgorithmException {
76        byte[] keyStart = "Key Testing".getBytes();
77        KeyGenerator kgen = KeyGenerator.getInstance(ALGORITHM);
78        SecureRandom sr = SecureRandom.getInstance(SECURE_RANDOM_ALGORITHM);
79        sr.setSeed(keyStart);
80        kgen.init(128, sr);
81        return kgen.generateKey().getEncoded();
82    }
83
84    private byte[] encrypt(byte[] raw, byte[] inputByte) throws Exception {
85        String str = ALGORITHM;
86        SecretKeySpec skeySpec = new SecretKeySpec(raw, str);
87        Cipher cipher2 = Cipher.getInstance(str);
88        cipher2.init(1, skeySpec);
89        return cipher2.doFinal(inputByte);
90    }
91
92    private byte[] decrypt(byte[] raw, byte[] encrypted) throws Exception {
93        String str = ALGORITHM;
94        SecretKeySpec skeySpec = new SecretKeySpec(raw, str);
95        Cipher cipher2 = Cipher.getInstance(str);
96        cipher2.init(2, skeySpec);
97        return cipher2.doFinal(encrypted);
98    }
99}