114 lines
4.3 KiB
C#
114 lines
4.3 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.Threading.Tasks;
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using System.Security.Cryptography;
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using System.IO;
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using Serilog;
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using Serilog.Events;
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namespace SERVER.LIB
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{
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/// <summary>
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/// 暂未使用
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/// </summary>
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public class AESHELP
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{
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/// <summary>
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/// AES解密
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/// <param name="input">密文字节数组</param>
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/// <param name="key">密钥（16位）</param>
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/// <returns>返回解密后的字符串</returns>
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/// </summary>
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public static string DecryptByAES(string input, string key)
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{
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byte[] inputBytes = Convert.FromBase64String(input);
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byte[] keyBytes = Encoding.UTF8.GetBytes(key.Substring(0, 16));
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using (AesCryptoServiceProvider aesAlg = new AesCryptoServiceProvider())
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{
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aesAlg.Padding = PaddingMode.PKCS7;
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aesAlg.Mode = CipherMode.ECB;
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aesAlg.Key = keyBytes;
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aesAlg.IV = keyBytes;
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ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
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using (MemoryStream msEncrypt = new MemoryStream(inputBytes))
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{
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using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, decryptor, CryptoStreamMode.Read))
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{
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using (StreamReader srEncrypt = new StreamReader(csEncrypt))
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{
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return srEncrypt.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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/// <summary>
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/// AES加密算法
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/// </summary>
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/// <param name="input">明文字符串</param>
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/// <param name="key">密钥（16位）</param>
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/// <returns>字符串</returns>
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public static string EncryptByAES(string input, string key)
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{
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byte[] keyBytes = Encoding.UTF8.GetBytes(key.Substring(0, 16));
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using (AesCryptoServiceProvider aesAlg = new AesCryptoServiceProvider())
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{
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aesAlg.Padding = PaddingMode.PKCS7;
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aesAlg.Mode = CipherMode.ECB;
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aesAlg.Key = keyBytes;
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aesAlg.IV = keyBytes;
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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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swEncrypt.Write(input);
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}
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byte[] bytes = msEncrypt.ToArray();
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var ddc = Convert.ToBase64String(bytes);
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byte[] inputBytes = Convert.FromBase64String(ddc);
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return ddc;
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}
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}
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}
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}
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/// <summary>
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/// 将指定的16进制字符串转换为byte数组
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/// </summary>
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/// <param name="s">16进制字符串(如：“7F 2C 4A”或“7F2C4A”都可以)</param>
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/// <returns>16进制字符串对应的byte数组</returns>
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public static byte[] HexStringToByteArray(string s)
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{
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s = s.Replace(" ", "");
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byte[] buffer = new byte[s.Length / 2];
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for (int i = 0; i < s.Length; i += 2)
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buffer[i / 2] = (byte)Convert.ToByte(s.Substring(i, 2), 16);
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return buffer;
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}
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/// <summary>
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/// 将一个byte数组转换成一个格式化的16进制字符串
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/// </summary>
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/// <param name="data">byte数组</param>
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/// <returns>格式化的16进制字符串</returns>
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public static string ByteArrayToHexString(byte[] data)
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{
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StringBuilder sb = new StringBuilder(data.Length * 3);
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foreach (byte b in data)
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{
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//16进制数字
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sb.Append(Convert.ToString(b, 16).PadLeft(2, '0'));
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//16进制数字之间以空格隔开
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//sb.Append(Convert.ToString(b, 16).PadLeft(2, '0').PadRight(3, ' '));
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}
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return sb.ToString().ToUpper();
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}
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}
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}
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