55 lines
1.9 KiB
C#
55 lines
1.9 KiB
C#
using System;
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using System.IO;
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using System.Security.Cryptography;
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using System.Text;
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namespace LFP_Manager.Function
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{
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class CsCryptoHelper
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{
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// 고정 키 및 IV (보안상 실제 사용 시 안전하게 관리 필요)
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private static readonly string key = "1234567890123456"; // 16글자 = 128bit
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private static readonly string iv = "6543210987654321"; // 16글자 = 128bit
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public static string Encrypt(string plainText)
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{
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using (Aes aesAlg = Aes.Create())
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{
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aesAlg.Key = Encoding.UTF8.GetBytes(key);
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aesAlg.IV = Encoding.UTF8.GetBytes(iv);
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ICryptoTransform encryptor = aesAlg.CreateEncryptor();
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using (MemoryStream msEncrypt = new MemoryStream())
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using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
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using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
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{
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swEncrypt.Write(plainText);
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swEncrypt.Close();
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return Convert.ToBase64String(msEncrypt.ToArray());
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}
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}
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}
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public static string Decrypt(string cipherText)
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{
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using (Aes aesAlg = Aes.Create())
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{
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aesAlg.Key = Encoding.UTF8.GetBytes(key);
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aesAlg.IV = Encoding.UTF8.GetBytes(iv);
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ICryptoTransform decryptor = aesAlg.CreateDecryptor();
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byte[] buffer = Convert.FromBase64String(cipherText);
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using (MemoryStream msDecrypt = new MemoryStream(buffer))
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using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
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using (StreamReader srDecrypt = new StreamReader(csDecrypt))
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{
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return srDecrypt.ReadToEnd();
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}
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}
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}
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}
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}
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