114 lines
3.9 KiB
C#
114 lines
3.9 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Security.Cryptography;
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using System.Text;
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namespace VRS.Util
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{
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public static class AESHelper
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{
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/// <summary>
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/// AES 加密
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/// </summary>
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/// <param name="content">待加密的字符串</param>
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/// <param name="key">密文</param>
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/// <returns></returns>
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public static string AesEncrypt(string str, string key)
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{
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if (string.IsNullOrEmpty(str)) return null;
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Byte[] toEncryptArray = Encoding.UTF8.GetBytes(str);
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RijndaelManaged rm = new RijndaelManaged
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{
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Key = Encoding.UTF8.GetBytes(key),
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Mode = CipherMode.ECB,
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Padding = PaddingMode.PKCS7
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};
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ICryptoTransform cTransform = rm.CreateEncryptor();
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Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
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return BitConverter.ToString(resultArray).Replace("-", "");
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}
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/// <summary>
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/// 校内密码加密
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/// </summary>
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/// <param name="plainText"></param>
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/// <returns></returns>
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public static string EncryptPassword(string plainText)
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{
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// AES 密钥（必须是 16、24 或 32 字节）
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var key = Encoding.UTF8.GetBytes("kGBxaThxMCMGaysp");
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// 初始化向量 IV（必须是 16 字节）
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var iv = Encoding.UTF8.GetBytes("VXFxgTgcvSDEXHpC");
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using (Aes aesAlg = Aes.Create())
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{
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aesAlg.Key = key;
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aesAlg.IV = iv;
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aesAlg.Mode = CipherMode.CBC;
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aesAlg.Padding = PaddingMode.PKCS7;
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// 创建加密器对象
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ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.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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// 写入加密后的数据到内存流中
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swEncrypt.Write(plainText);
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}
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}
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// 返回加密后的数据的 Base64 字符串
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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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/// <summary>
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/// AES 解密
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/// </summary>
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/// <param name="content">待解密的字符串</param>
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/// <param name="key">密文</param>
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/// <returns></returns>
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public static string AesDecrypt(string content, string key)
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{
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if (string.IsNullOrEmpty(content)) return null;
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Byte[] toEncryptArray = ConvertToByteArray(content);
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RijndaelManaged rm = new RijndaelManaged
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{
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Key = Encoding.UTF8.GetBytes(key),
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Mode = CipherMode.ECB,
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Padding = PaddingMode.PKCS7
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};
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ICryptoTransform cTransform = rm.CreateDecryptor();
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Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
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return Encoding.UTF8.GetString(resultArray);
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}
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/// <summary>
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/// hex字符串转为byte[]数组
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/// </summary>
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/// <param name="hexString">hex字符串</param>
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/// <returns></returns>
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private static byte[] ConvertToByteArray(string hexString)
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{
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int length = hexString.Length / 2;
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byte[] bytes = new byte[length];
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for (int i = 0; i < length; ++i)
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{
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bytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2), 16);
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}
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return bytes;
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}
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}
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} |