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 PdmAlert
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{
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/// <summary>
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/// 字符加解密
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/// </summary>
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public class Encryptor
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{
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private readonly byte[] key;
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private readonly byte[] iv;
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public Encryptor(string keyString, string ivString)
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{
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key = Encoding.UTF8.GetBytes(keyString);
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iv = Encoding.UTF8.GetBytes(ivString);
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}
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public string Encrypt(string plainText)
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{
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using (var aes = Aes.Create())
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{
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aes.Key = key;
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aes.IV = iv;
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ICryptoTransform encryptor = aes.CreateEncryptor(aes.Key, aes.IV);
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using (MemoryStream msEncrypt = new MemoryStream())
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{
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using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
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{
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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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}
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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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}
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public string Decrypt(string cipherText)
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{
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using (var aes = Aes.Create())
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{
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aes.Key = key;
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aes.IV = iv;
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ICryptoTransform decryptor = aes.CreateDecryptor(aes.Key, aes.IV);
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byte[] arr = Convert.FromBase64String(cipherText);
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using (MemoryStream msDecrypt = new MemoryStream(arr))
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{
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using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
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{
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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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}
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}
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