75 lines
1.8 KiB
C#
75 lines
1.8 KiB
C#
using System.Security.Cryptography;
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using System.Text;
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namespace YandexMusic.API.Common
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{
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/// <summary>
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/// Класс для шифровки
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/// </summary>
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public class Encryptor
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{
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#region Поля
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private readonly string IV = "encryption";
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private readonly byte[] IVHash;
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private readonly byte[] keyHash;
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private readonly MD5 md5;
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private readonly Aes aesAlg;
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#endregion Поля
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#region Вспомогательные функции
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private byte[] GetHash(string value)
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{
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return md5.ComputeHash(Encoding.UTF8.GetBytes(value));
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}
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#endregion Вспомогательные функции
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public Encryptor(string key)
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{
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md5 = MD5.Create();
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aesAlg = Aes.Create();
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aesAlg.BlockSize = 128;
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aesAlg.Padding = PaddingMode.PKCS7;
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keyHash = GetHash(key);
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IVHash = GetHash(IV);
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}
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public byte[] Encrypt(byte[] data)
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{
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using MemoryStream ms = new();
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using CryptoStream csEncrypt = new(ms, aesAlg.CreateEncryptor(keyHash, IVHash), CryptoStreamMode.Write);
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csEncrypt.Write(data, 0, data.Length);
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if (!csEncrypt.HasFlushedFinalBlock)
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csEncrypt.FlushFinalBlock();
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return ms.ToArray();
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}
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public byte[] Decrypt(byte[] data)
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{
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using MemoryStream ms = new();
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using CryptoStream csDecrypt = new(ms, aesAlg.CreateDecryptor(keyHash, IVHash), CryptoStreamMode.Write);
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csDecrypt.Write(data, 0, data.Length);
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if (!csDecrypt.HasFlushedFinalBlock)
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csDecrypt.FlushFinalBlock();
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return ms.ToArray();
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}
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}
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} |