c# Aes加解密
2024-10-20 07:28:07
using System;
using System.Collections.Generic;
using System.IO;
using System.Security.Cryptography;
using System.Text;
namespace ConsoleApp1
{
internal class Program
{
/// <summary>
///
/// </summary>
/// <param name="args"></param>
private static void Main(string[] args)
{
string IVString = "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";//IV
string key = "IE7XG5ORF7EA4JC5";//key
string encrypt = "3duwmKQ5ED4FRz3UtSN2zMvrLOPEiGn9Fwj2oEJngww=";
string decrypt = "3001004";
//加密
string encryptValue = AesEncrypt(decrypt, key, IVString);
Console.WriteLine(encryptValue);
Console.WriteLine(encryptValue.Equals(encrypt));
Console.WriteLine("");
//解密
string decryptValue = AesDecrypt(encryptValue, key, IVString);
Console.WriteLine(decryptValue);
Console.WriteLine(decryptValue.Equals(decrypt));
Console.Read();
}
/// <summary>
/// 加密
/// </summary>
/// <param name="str"></param>
/// <param name="key"></param>
/// <param name="IVString"></param>
/// <returns></returns>
public static string AesEncrypt(string str, string key, string IVString)
{
Encoding encoder = Encoding.UTF8;
byte[] toEncryptArray = Encoding.UTF8.GetBytes(str);
RijndaelManaged rm = new RijndaelManaged
{
Key = encoder.GetBytes(key),
Mode = CipherMode.CBC,
Padding = PaddingMode.PKCS7,
IV = encoder.GetBytes(IVString),
};
ICryptoTransform cTransform = rm.CreateEncryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
return ToBCDStringLower(resultArray);
}
/// <summary>
/// 解密
/// </summary>
/// <param name="str"></param>
/// <param name="key"></param>
/// <param name="IVString"></param>
/// <returns></returns>
public static string AesDecrypt(string str, string key, string IVString)
{
Encoding encoder = Encoding.UTF8;
using (AesCryptoServiceProvider aes = new AesCryptoServiceProvider())
{
aes.Key = encoder.GetBytes(key);
aes.IV = encoder.GetBytes(IVString);
var enc = aes.CreateDecryptor(aes.Key, aes.IV);
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, enc, CryptoStreamMode.Write))
{
var bts = FromBCDString(str);
cs.Write(bts, 0, bts.Length);
}
return encoder.GetString(ms.ToArray());
}
}
}
public static byte[] FromBCDString(string buffer)
{
if (buffer == null) return null;
int start = 0;
int count = buffer.Length;
bool inCase = false;
byte cur = 0;
int dataEnd = start + count;
List<byte> lst = new List<byte>(count / 2);
while (start < dataEnd)
{
byte num = (byte)buffer[start++];
if (num == ' ' || num == '\r' || num == '\n' || num == '\t')
{
if (inCase)
{
lst.Add((byte)(cur / 16));
inCase = false;
}
continue;
}
byte tmp = 0;
if (num >= '0' && num <= '9')
tmp = (byte)(num - '0');
else if (num >= 'a' && num <= 'f')
tmp = (byte)(num - 'a' + 10);
else if (num >= 'A' && num <= 'F')
tmp = (byte)(num - 'A' + 10);
else
throw new ArgumentException("需要传入一个正确的BCD字符串，BCD字符串中只能包含 0-9 A-F a-f 和空格，回车 制表符!");
if (!inCase)
{
cur = (byte)(tmp * 16);
inCase = true;
}
else
{
cur += tmp;
inCase = false;
lst.Add(cur);
}
}
if (inCase)
{
lst.Add((byte)(cur / 16));
inCase = false;
}
return lst.ToArray();
}
public static string ToBCDStringLower(byte[] buffer)
{
StringBuilder sb = new StringBuilder();
for (int i = 0; i < buffer.Length; i++)
{
sb.Append(buffer[i].ToString("x2"));
}
return sb.ToString();//result;
}
}
}
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