95 lines
3.1 KiB
C#
95 lines
3.1 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Management;
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using System.Security.Cryptography;
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using System.IO;
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namespace VisualPascalABCPlugins
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{
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public static class TeacherPluginUtils
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{
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public static string ProcessorId()
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{
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/*var mbs = new ManagementObjectSearcher("Select ProcessorId From Win32_processor");
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var mbsList = mbs.Get();
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foreach (ManagementObject mo in mbsList)
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{
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var pId = mo["ProcessorId"];
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if (pId != null)
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return pId.ToString();
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else return "AAAAAAAAAAAAAAAA";
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}*/
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return "AAAAAAAAAAAAAAAA";
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}
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public static byte[] Encrypt(string src)
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{
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var ae = Aes.Create();
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var key = Encoding.UTF8.GetBytes(ProcessorId());
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var crypt = ae.CreateEncryptor(key, key);
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byte[] encrypted;
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using (var ms = new MemoryStream())
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{
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using (var cs = new CryptoStream(ms, crypt, CryptoStreamMode.Write))
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using (var sw = new StreamWriter(cs))
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{
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sw.Write(src);
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}
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encrypted = ms.ToArray();
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}
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return encrypted;
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}
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public static string EncryptString(string src)
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{
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var bytes = Encrypt(src);
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return Convert.ToBase64String(bytes);
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}
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public static string Decrypt(byte[] data)
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{
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if (data == null)
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return "";
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var ae = Aes.Create();
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var key = Encoding.UTF8.GetBytes(ProcessorId());
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var crypt = ae.CreateDecryptor(key, key);
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string text;
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using (var ms = new MemoryStream(data))
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using (var cs = new CryptoStream(ms, crypt, CryptoStreamMode.Read))
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using (var sr = new StreamReader(cs))
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{
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text = sr.ReadToEnd();
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}
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return text;
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}
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public static string DecryptString(string data)
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{
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var bytes = Convert.FromBase64String(data);
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return Decrypt(bytes);
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}
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public static string[] ReadLoginPassFromAuth(string AuthFileFullName)
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{
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// Исключения обрабатываются уровнем выше
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string[] lparr = new string[0];
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var n = 10000;
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var arr = new byte[n];
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int nbytes;
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// Здесь может быть исключение если с файлом или путем проблемы
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using (var fs = new FileStream(AuthFileFullName, FileMode.Open))
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{
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nbytes = fs.Read(arr, 0, n);
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}
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var data = new byte[nbytes];
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System.Array.Copy(arr, data, nbytes);
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// Здесь может быть исключение если ключ неправильный
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var lp = Decrypt(data);
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lparr = lp.Split((char)10);
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return lparr;
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}
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}
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}
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