using SM.Core;
using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
namespace AR.Core
{
///Des加密
public class DesEncryptHelper
{
private const string Key = "W1#x!3Cm";
///
/// DES+Base64加密
/// 采用ECB、PKCS7
///
/// 加密字符串
/// 秘钥
public static string Encrypt(string encryptString, string key = null)
{
return Encrypt(encryptString, key, false, true);
}
///
/// DES+Base64解密
/// 采用ECB、PKCS7
///
/// 解密字符串
/// 秘钥
public static string Decrypt(string decryptString, string key = null)
{
return Decrypt(decryptString, key, false);
}
///
/// DES+16进制加密
/// 采用ECB、PKCS7
///
/// 加密字符串
/// 秘钥
/// 是否小写
public static string Encrypt4Hex(string encryptString, string key = null, bool lowerCase = false)
{
return Encrypt(encryptString, key, true, lowerCase);
}
///
/// DES+16进制解密
/// 采用ECB、PKCS7
///
/// 解密字符串
/// 秘钥
public static string Decrypt4Hex(string decryptString, string key = null)
{
return Decrypt(decryptString, key, true);
}
/// DES加密
private static string Encrypt(string encryptString, string key, bool hex, bool lowerCase = false)
{
if (string.IsNullOrEmpty(encryptString))
return null;
if (string.IsNullOrEmpty(key))
key = Key;
if (key.Length < 8)
throw new ArgumentException("秘钥长度为8位", nameof(key));
var keyBytes = Encoding.UTF8.GetBytes(key.Substring(0, 8));
var inputByteArray = Encoding.UTF8.GetBytes(encryptString);
DES des = DES.Create();
des.Mode = CipherMode.ECB;
des.Key = keyBytes;
des.Padding = PaddingMode.PKCS7;
using (var stream = new MemoryStream())
{
var cStream = new CryptoStream(stream, des.CreateEncryptor(), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
var bytes = stream.ToArray();
return hex ? bytes.ToHex(lowerCase) : bytes.ToBase64();
}
}
/// DES解密
private static string Decrypt(string decryptString, string key, bool hex)
{
if (string.IsNullOrEmpty(decryptString))
return null;
if (string.IsNullOrEmpty(key))
key = Key;
if (key.Length < 8)
throw new ArgumentException("秘钥长度为8位", nameof(key));
var keyBytes = Encoding.UTF8.GetBytes(key.Substring(0, 8));
var inputByteArray = hex ? decryptString.HexToBytes() : Convert.FromBase64String(decryptString);
DES des = DES.Create();
des.Mode = CipherMode.ECB;
des.Key = keyBytes;
des.Padding = PaddingMode.PKCS7;
using (var mStream = new MemoryStream())
{
var cStream = new CryptoStream(mStream, des.CreateDecryptor(), CryptoStreamMode.Write);
cStream.Write(inputByteArray, 0, inputByteArray.Length);
cStream.FlushFinalBlock();
return Encoding.UTF8.GetString(mStream.ToArray());
}
}
}
}