6 changed files with 209 additions and 7 deletions
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using System; |
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using System.Collections.Generic; |
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using System.IO.Compression; |
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using System.Security.Cryptography; |
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using System.Text; |
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using System.Text.Json; |
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namespace SunlightAggregationTerminal.Class |
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{ |
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public class SecureJsonService |
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{ |
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private readonly byte[] _aesKey = Encoding.UTF8.GetBytes("12345678901234567890123456789012"); |
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/// <summary>
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/// 调用一：发送端处理
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/// 流程：JSON序列化 -> GZip压缩 -> AES加密 -> Base64编码
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/// </summary>
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public string CompressEncryptAndSend(object dataObject) |
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{ |
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try |
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{ |
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// 1. JSON 序列化 (使用 System.Text.Json 进行最小化处理)
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// JsonSerializerOptions 默认不包含缩进，即最小化
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string jsonString = JsonSerializer.Serialize(dataObject); |
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byte[] jsonBytes = Encoding.UTF8.GetBytes(jsonString); |
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// 2. GZip 压缩
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byte[] compressedBytes = CompressBytes(jsonBytes); |
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// 3. AES 加密
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byte[] encryptedBytes = EncryptBytes(compressedBytes); |
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// 4. Base64 编码 (转为字符串以便在网络传输)
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string finalPayload = Convert.ToBase64String(encryptedBytes); |
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return finalPayload; |
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} |
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catch (Exception ex) |
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{ |
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Console.WriteLine($"发送端处理错误: {ex.Message}"); |
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throw; |
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} |
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} |
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/// <summary>
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/// 调用二：接收端处理
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/// 流程：Base64解码 -> AES解密 -> GZip解压 -> JSON反序列化
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/// </summary>
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public T? ReceiveDecryptAndDecompress<T>(string payload) |
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{ |
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try |
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{ |
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// 1. Base64 解码
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byte[] encryptedBytes = Convert.FromBase64String(payload); |
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// 2. AES 解密
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byte[] compressedBytes = DecryptBytes(encryptedBytes); |
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// 3. GZip 解压
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byte[] jsonBytes = DecompressBytes(compressedBytes); |
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// 4. JSON 反序列化
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string jsonString = Encoding.UTF8.GetString(jsonBytes); |
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T result = JsonSerializer.Deserialize<T>(jsonString); |
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return result; |
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} |
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catch (Exception) |
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{ |
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throw; |
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} |
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} |
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// --- 底层辅助方法 ---
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private byte[] CompressBytes(byte[] data) |
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{ |
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using (var outputStream = new MemoryStream()) |
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{ |
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using (var gzipStream = new GZipStream(outputStream, CompressionLevel.Optimal)) |
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{ |
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gzipStream.Write(data, 0, data.Length); |
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} |
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return outputStream.ToArray(); |
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} |
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} |
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private byte[] DecompressBytes(byte[] data) |
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{ |
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using (var inputStream = new MemoryStream(data)) |
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{ |
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using (var gzipStream = new GZipStream(inputStream, CompressionMode.Decompress)) |
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{ |
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using (var outputStream = new MemoryStream()) |
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{ |
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gzipStream.CopyTo(outputStream); |
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return outputStream.ToArray(); |
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} |
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} |
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} |
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} |
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private byte[] EncryptBytes(byte[] data) |
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{ |
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using (Aes aes = Aes.Create()) |
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{ |
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aes.Key = _aesKey; |
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aes.Mode = CipherMode.CBC; |
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aes.Padding = PaddingMode.PKCS7; |
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aes.GenerateIV(); // 每次加密生成随机IV
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var encryptor = aes.CreateEncryptor(aes.Key, aes.IV); |
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using (var ms = new MemoryStream()) |
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{ |
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// 重要：先将 IV 写入流中，以便解密时读取
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ms.Write(aes.IV, 0, aes.IV.Length); |
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using (var cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write)) |
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{ |
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cs.Write(data, 0, data.Length); |
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cs.FlushFinalBlock(); |
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return ms.ToArray(); |
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} |
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} |
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} |
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} |
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private byte[] DecryptBytes(byte[] data) |
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{ |
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using (Aes aes = Aes.Create()) |
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{ |
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aes.Key = _aesKey; |
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aes.Mode = CipherMode.CBC; |
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aes.Padding = PaddingMode.PKCS7; |
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// 从数据开头读取 IV (AES IV 固定为 16 字节)
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byte[] iv = new byte[16]; |
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Buffer.BlockCopy(data, 0, iv, 0, iv.Length); |
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aes.IV = iv; |
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var decryptor = aes.CreateDecryptor(aes.Key, aes.IV); |
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using (var ms = new MemoryStream(data, iv.Length, data.Length - iv.Length)) |
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{ |
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using (var cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Read)) |
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{ |
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using (var resultStream = new MemoryStream()) |
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{ |
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cs.CopyTo(resultStream); |
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return resultStream.ToArray(); |
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} |
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} |
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} |
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} |
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} |
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} |
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} |
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