135 lines
4.6 KiB
C#
135 lines
4.6 KiB
C#
using NPOI.POIFS.Crypt.Dsig;
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using Org.BouncyCastle.Crypto.Signers;
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using System;
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using System.Buffers.Text;
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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.X509Certificates;
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using System.Text;
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using System.Text.Unicode;
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using System.Threading.Tasks;
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namespace Infrastructure.Helpers
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{
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public class EncryptionHelper
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{
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String privateKey = "ABA4354EFAFE944C2F226A3981C7DC70F43BD6053EDA83F4DC274242BBB23CAA";
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String publicKey = "04F1BF1BEFD63F16E5DB3BCD32CA5D9A8E8DF7ADD67D6C4F293FB23F7BDA74F52D31B8DDAD03D955D566505A15D8B7DBE83B42378B8E8749C0EB6E2FBC8675838B";
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byte[] sm4Key = null;
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public EncryptionHelper()
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{
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}
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/// <summary>
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/// 获取x-lc-secret
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/// </summary>
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/// <returns></returns>
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public string getxseret()
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{
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if (sm4Key == null)
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{
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sm4Key = SM4CryptoHelper.GenerateSM4Key();
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}
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string publickey = "04D6974E2384ECE39F5ADF1473E4B9B60E0D438A6F701F667C0C88D25BE2F8508A3AAFF9D9500ECFFD8E79B2DE58C024B689B5C207486646EA08A352FBB0016D46";
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//十六进制字符串 → 字节数组
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byte[] publickeybyte = HexToBytes(publickey);
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var encryptdatasm2 = SM2CryptoHelper.Encrypt(publickeybyte, sm4Key);
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return Convert.ToBase64String(encryptdatasm2);
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}
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/// <summary>
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/// 数据加密
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/// </summary>
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/// <param name="input"></param>
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/// <returns></returns>
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public string Encrypt(byte[] input)
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{
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if (sm4Key == null)
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{
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sm4Key = SM4CryptoHelper.GenerateSM4Key();
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}
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var encryptdatasm4 = SM4CryptoHelper.Encrypt(sm4Key, input);
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return Convert.ToBase64String(encryptdatasm4);
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}
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/// <summary>
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/// 数据解密
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/// </summary>
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/// <param name="x_lc_screte"></param>
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/// <param name="output"></param>
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/// <returns></returns>
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public string Decrypt(byte[] x_lc_screte,byte[] output)
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{
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byte[] privatekeybyte = HexToBytes(privateKey);
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byte[] sm4key = SM2CryptoHelper.Decrypt(privatekeybyte, x_lc_screte);
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var decryptdata = SM4CryptoHelper.Decrypt(sm4key, output);
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return Encoding.UTF8.GetString(decryptdata);
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}
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/// <summary>
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/// 获取x-lc-token
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/// </summary>
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/// <param name="certCode"></param>
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/// <returns></returns>
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/// <exception cref="InvalidOperationException"></exception>
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public string GetToken(string certCode)
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{
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// 获取毫秒级时间戳（.NET 中 Ticks 转换为毫秒）
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long timestamp = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
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//long timestamp = 1751274197662;
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// 拼接待签名数据
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string needSignData = certCode + timestamp;
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byte[] needSignDataByte = Encoding.UTF8.GetBytes(needSignData);
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// 4. SM2签名
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byte[] signData;
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byte[] privatekeybyte = HexToBytes(privateKey);
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try
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{
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signData = SM2CryptoHelper.Sign(privatekeybyte, needSignDataByte);
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}
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catch (Exception ex)
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{
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throw new InvalidOperationException("SM2签名失败", ex);
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}
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// SM2 签名
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//byte[] signData = SM2CryptoHelper.Sign(privatekeybyte, needSignDataByte);
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// Base64 编码签名（直接使用 Convert）
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string signDataBase64 = Convert.ToBase64String(signData);
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// 生成 token
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string token = $"{certCode}.{timestamp}.{signDataBase64}";
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return token;
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}
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/// <summary>
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/// 内部转byte方法
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/// </summary>
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/// <param name="hex"></param>
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/// <returns></returns>
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/// <exception cref="ArgumentNullException"></exception>
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/// <exception cref="ArgumentException"></exception>
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public static byte[] HexToBytes(string hex)
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{
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if (hex == null)
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throw new ArgumentNullException(nameof(hex));
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if (hex.Length % 2 != 0)
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throw new ArgumentException("十六进制字符串长度必须是偶数");
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byte[] bytes = new byte[hex.Length / 2];
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for (int i = 0; i < bytes.Length; i++)
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{
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string byteStr = hex.Substring(i * 2, 2);
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bytes[i] = Convert.ToByte(byteStr, 16);
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}
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return bytes;
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}
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}
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}
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