[UWP] Cryptograph App

STUDYING/C#

[UWP] Cryptograph App

l_j_yeon 2017. 8. 16. 23:53

출처 : https://www.youtube.com/watch?v=2suqdbeNPUM&index=7&list=LLrMY3C2G9ShhFi3y6GCkk1w&t=3s

Library.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using System.Text;
using System.Threading.Tasks;
using Windows.Security.Cryptography;
using Windows.Security.Cryptography.Core;
using Windows.Storage;
using Windows.Storage.Pickers;
using Windows.Storage.Streams;
using Windows.UI.Xaml.Controls;

namespace UWPCryptograph
{
    class Library
    {
        private static byte[] values = {1,4,8,15,16,23,42,108, 1, 4, 8, 15, 16, 23, 42, 108,
        1,4,8,15,16,23,42,108,1,4,8,15,16,23,42,108};
        private static SymmetricKeyAlgorithmProvider algorithm =
            SymmetricKeyAlgorithmProvider.OpenAlgorithm(SymmetricAlgorithmNames.AesCbcPkcs7);
        private static CryptographicKey key = algorithm.CreateSymmetricKey(CryptographicBuffer.CreateFromByteArray(values));
        private static IBuffer iv = values.AsBuffer();

public async void Open(TextBox display)
        {
            try
            {
                FileOpenPicker picker = new FileOpenPicker();
                picker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;
                picker.FileTypeFilter.Add(".txt");
                StorageFile file = await picker.PickSingleFileAsync();
                display.Text = await FileIO.ReadTextAsync(file);
            }
            catch
            {

}
        }

public async void Save(TextBox display)
        {
            try
            {
                FileSavePicker picker = new FileSavePicker();
                picker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;
                picker.FileTypeChoices.Add("Plain Text", new List<string>() { ".txt" });
                picker.DefaultFileExtension = ".txt";
                picker.SuggestedFileName = "Document";
                StorageFile file= await picker.PickSaveFileAsync();
                if(file!=null)
                {
                    await FileIO.WriteTextAsync(file, display.Text);
                }
            }
            catch
            {

}
        }

public void Encrypt(TextBox display)
        {
            try
            {
                IBuffer buffer = CryptographicBuffer.ConvertStringToBinary(display.Text, BinaryStringEncoding.Utf8);
                IBuffer bufferEncrypt = CryptographicEngine.Encrypt(key, buffer, iv);
                display.Text = CryptographicBuffer.EncodeToBase64String(bufferEncrypt);
            }
            catch
            {

}
        }

public void Decrypt(TextBox display)
        {
            try
            {
                IBuffer buffer = Convert.FromBase64String(display.Text).AsBuffer();
                IBuffer bufferDecrypt = CryptographicEngine.Decrypt(key, buffer, iv);
                display.Text = CryptographicBuffer.ConvertBinaryToString(BinaryStringEncoding.Utf8,bufferDecrypt);
            }
            catch
            {

}
        }
    }
}

MainPage.xaml

MainPage.xaml.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

// 빈 페이지 항목 템플릿은 http://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409 에 문서화되어 있습니다.

namespace UWPCryptograph
{
    /// <summary>
    /// 자체적으로 사용하거나 프레임 내에서 탐색할 수 있는 빈 페이지입니다.
    /// </summary>
    public sealed partial class MainPage : Page
    {
        Library lib = new Library();

public MainPage()
        {
            this.InitializeComponent();
        }

private void Open_Click(object sender, RoutedEventArgs e)
        {
            lib.Open(Display);
        }

private void Save_Click(object sender, RoutedEventArgs e)
        {
            lib.Save(Display);
        }

private void Encrypt_Click(object sender, RoutedEventArgs e)
        {
            lib.Encrypt(Display);
        }

private void Decrypt_Click(object sender, RoutedEventArgs e)
        {
            lib.Decrypt(Display);
        }
    }
}

결과 화면

text 입력

Encrypt

Save File

Open File

Open File -> Decrypt

저작자표시 비영리 변경금지 (새창열림)