cipher2 0.3.4

A flutter plugin project for encryption and decrytion which support both ios and android.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'dart:async';
import 'package:flutter/services.dart';
import 'package:cipher2/cipher2.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _plainText = 'Unknown';
  String _encryptedString = '';
  String _decryptedString = '';

  @override
  void initState() {
    super.initState();
    initPlatformState();
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    String encryptedString;
    String plainText = '我是shyandsy，never give up man';
    String key = 'xxxxxxxxxxxxxxxx';
    String iv = 'yyyyyyyyyyyyyyyy';
    String decryptedString;

    // test
    await testEncryptAesCbc128Padding7();

    await testDecryptAesCbc128Padding7();

    await testEncryptAesGcm128(); // GenerateNonce();
    
    try {

      // encrytion
      encryptedString = await Cipher2.encryptAesCbc128Padding7(plainText, key, iv);
      
      // decrytion
      //encryptedString = "hello";
      decryptedString = await Cipher2.decryptAesCbc128Padding7(encryptedString, key, iv);
    
    } on PlatformException catch(e) {

      encryptedString = "";
      decryptedString = "";
      print("exception code: " + e.code);
      print("exception message: " + e.message);

    }

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _plainText = plainText;
      _encryptedString = encryptedString;
      _decryptedString = decryptedString;
    });
  }

  void testEncryptAesCbc128Padding7() async{
    // case 1： wrong length on key
    String plainText = '我是shyandsy，never give up man';
    String key = 'xx';
    String iv = 'yyyyyyyyyyyyyyyy';
    String encryptedString = "";
    
    try {
      // encrytion
      encryptedString = await Cipher2.encryptAesCbc128Padding7(plainText, key, iv);
      print("testEncrytion case1: failed");
    } on PlatformException catch(e) {
      encryptedString = "";
      if(e.code == "ERROR_INVALID_KEY_OR_IV_LENGTH"){
        print("testEncrytion case1: pass");
      }else{
        print("testEncrytion case1: failed");
      }
    }

    // case 2： wrong length on iv
    plainText = '我是shyandsy，never give up man';
    key = 'xxxxxxxxxxxxxxxx';
    iv = 'yyy';
    encryptedString = "";
    
    try {
      // encrytion
      encryptedString = await Cipher2.encryptAesCbc128Padding7(plainText, key, iv);
      print("testEncrytion case2: failed");
    } on PlatformException catch(e) {
      encryptedString = "";
      if(e.code == "ERROR_INVALID_KEY_OR_IV_LENGTH"){
        print("testEncrytion case2: pass");
      }else{
        print("testEncrytion case2: failed");
      }
    }

    // case 3: null data
    plainText = '我是shyandsy，never give up man';
    key = 'xxxxxxxxxxxxxxxx';
    iv = 'yyy';
    encryptedString = "";
    
    try {
      // encrytion
      encryptedString = await Cipher2.encryptAesCbc128Padding7(null, key, iv);
      print("testEncrytion case3: failed");
    } on PlatformException catch(e) {
      encryptedString = "";
      if(e.code == "ERROR_INVALID_PARAMETER_TYPE"){
        print("testEncrytion case3: pass");
      }else{
        print("testEncrytion case3: failed");
      }
    }

    // case 4: null key
    plainText = '我是shyandsy，never give up man';
    key = 'xxxxxxxxxxxxxxxx';
    iv = 'yyyyyyyyyyyyyyyy';
    encryptedString = "";
    
    try {
      // encrytion
      encryptedString = await Cipher2.encryptAesCbc128Padding7(plainText, null, iv);
      print("testEncrytion case4: failed");
    } on PlatformException catch(e) {
      encryptedString = "";
      if(e.code == "ERROR_INVALID_PARAMETER_TYPE"){
        print("testEncrytion case4: pass");
      }else{
        print("testEncrytion case4: failed");
      }
    }

    // case 5: null iv
    plainText = '我是shyandsy，never give up man';
    key = 'xxxxxxxxxxxxxxxx';
    iv = 'yyyyyyyyyyyyyyyy';
    encryptedString = "";
    
    try {
      // encrytion
      encryptedString = await Cipher2.encryptAesCbc128Padding7(plainText, key, null);
      print("testEncrytion case5: failed");
    } on PlatformException catch(e) {
      encryptedString = "";
      if(e.code == "ERROR_INVALID_PARAMETER_TYPE"){
        print("testEncrytion case5: pass");
      }else{
        print("testEncrytion case5: failed");
      }
    }
  }

  void testDecryptAesCbc128Padding7() async{
    // case 1： wrong length on key
    String encryptedString = '我是shyandsy，never give up man';
    String key = 'xx';
    String iv = 'yyyyyyyyyyyyyyyy';
    String plainText = "";
    
    try {
      // encrytion
      plainText = await Cipher2.decryptAesCbc128Padding7(encryptedString, key, iv);
      print("testDecrytion case1: failed");
    } on PlatformException catch(e) {
      encryptedString = "";
      if(e.code == "ERROR_INVALID_KEY_OR_IV_LENGTH"){
        print("testDecrytion case1: pass");
      }else{
        print("testDecrytion case1: failed");
      }
    }

    // case 2： wrong length on iv
    encryptedString = '我是shyandsy，never give up man';
    key = 'xxxxxxxxxxxxxxxx';
    iv = 'yyy';
    
    try {
      // encrytion
      plainText = await Cipher2.decryptAesCbc128Padding7(encryptedString, key, iv);
      print("testDecrytion case2: failed");
    } on PlatformException catch(e) {
      encryptedString = "";
      if(e.code == "ERROR_INVALID_KEY_OR_IV_LENGTH"){
        print("testDecrytion case2: pass");
      }else{
        print("testDecrytion case2: failed");
      }
    }

    // case 3: null data
    encryptedString = '我是shyandsy，never give up man';
    key = 'xxxxxxxxxxxxxxxx';
    iv = 'yyy';
    
    try {
      // encrytion
      plainText = await Cipher2.decryptAesCbc128Padding7(null, key, iv);
      print("testDecrytion case3: failed");
    } on PlatformException catch(e) {
      encryptedString = "";
      if(e.code == "ERROR_INVALID_PARAMETER_TYPE"){
        print("testDecrytion case3: pass");
      }else{
        print("testDecrytion case3: failed");
      }
    }

    // case 4: null key
    encryptedString = '我是shyandsy，never give up man';
    key = 'xxxxxxxxxxxxxxxx';
    iv = 'yyyyyyyyyyyyyyyy';
    
    try {
      // encrytion
      plainText = await Cipher2.decryptAesCbc128Padding7(encryptedString, null, iv);
      print("testDecrytion case4: failed");
    } on PlatformException catch(e) {
      encryptedString = "";
      if(e.code == "ERROR_INVALID_PARAMETER_TYPE"){
        print("testDecrytion case4: pass");
      }else{
        print("testDecrytion case4: failed");
      }
    }

    // case 5: null iv
    encryptedString = '我是shyandsy，never give up man';
    key = 'xxxxxxxxxxxxxxxx';
    iv = 'yyyyyyyyyyyyyyyy';
    
    try {
      // encrytion
      plainText = await Cipher2.decryptAesCbc128Padding7(encryptedString, key, null);
      print("testDecrytion case5: failed");
    } on PlatformException catch(e) {
      encryptedString = "";
      if(e.code == "ERROR_INVALID_PARAMETER_TYPE"){
        print("testDecrytion case5: pass");
      }else{
        print("testDecrytion case5: failed");
      }
    }

    // case 6: data
    encryptedString = '我是shyandsy，never give up man';
    key = 'xxxxxxxxxxxxxxxx';
    iv = 'yyyyyyyyyyyyyyyy';
    
    try {
      // encrytion
      plainText = await Cipher2.decryptAesCbc128Padding7(encryptedString, key, iv);
      print("testDecrytion case6: failed");
    } on PlatformException catch(e) {
      encryptedString = "";
      if(e.code == "ERROR_INVALID_ENCRYPTED_DATA"){
        print("testDecrytion case6: pass");
      }else{
        print("testDecrytion case6: failed");
      }
    }
  }

  void testEncryptAesGcm128() async{
    String nonce = await Cipher2.generateNonce();
    String encryptedString = "";
    String plaintext = "我是谁，来喝杯茶";
    String key = "key1234567123456";
    String result = "";

    try{
      encryptedString = await Cipher2.encryptAesGcm128(plaintext, key, nonce);
      //print(nonce);
      //print(encryptedString);
      print("testEncryptAesGcm128 case1: pass");
    } on PlatformException catch(e) {
      print("testEncryptAesGcm128 case1: failed");
    }    

    try{
      result = await Cipher2.decryptAesGcm128(encryptedString, key, nonce);
      //print(result);
      print("testEncryptAesGcm128 case2: pass");
    } on PlatformException catch(e) {
      print("testEncryptAesGcm128 case2: failed, " + e.code);
    }    

    if(plaintext != result){
      print("testEncryptAesGcm128 case3: failed");
    }else{
      print("testEncryptAesGcm128 case3: pass");
    }
    
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
          backgroundColor: Colors.purple,
        ),
        body: Center(
          child:new ListView(
            children: <Widget>[
              new Container(
                child: Text('Orignal Text:', style: TextStyle(fontSize: 30.0, fontWeight: FontWeight.bold, color: Colors.white),),
                decoration: new BoxDecoration(color: Colors.purple),
                padding: new EdgeInsets.fromLTRB(16.0, 16.0, 16.0, 16.0),
              ),
              new Container(
                child: Text(_plainText, style: TextStyle(fontSize: 20.0, color: Colors.black),),
                padding: new EdgeInsets.fromLTRB(16.0, 16.0, 16.0, 16.0),
              ),
              new Container(
                child: Text('AES Encrytion Result:', style: TextStyle(fontSize: 30.0, fontWeight: FontWeight.bold, color: Colors.white),),
                decoration: new BoxDecoration(color: Colors.purple),
                padding: new EdgeInsets.fromLTRB(16.0, 16.0, 16.0, 16.0),
              ),
              new Container(
                child: Text(_encryptedString, style: TextStyle(fontSize: 20.0, color: Colors.black),),
                padding: new EdgeInsets.fromLTRB(16.0, 16.0, 16.0, 16.0),
              ),
              new Container(
                child: Text('AES Decrytion Result:', style: TextStyle(fontSize: 30.0, fontWeight: FontWeight.bold, color: Colors.white),),
                decoration: new BoxDecoration(color: Colors.purple),
                padding: new EdgeInsets.fromLTRB(16.0, 16.0, 16.0, 16.0),
              ),
              new Container(
                child: Text(_decryptedString, style: TextStyle(fontSize: 20.0, color: Colors.black)),
                padding: new EdgeInsets.fromLTRB(16.0, 16.0, 16.0, 16.0),
              ),
            ],
          ),
        ),
      ),
    );
  }
}