54 lines
2.0 KiB
C#
54 lines
2.0 KiB
C#
using Apimanager_backend.Dtos;
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using Newtonsoft.Json;
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using System.Security.Cryptography;
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using System.Text;
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namespace Apimanager_backend.Tools
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{
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public static class EpayHelper
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{
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/// <summary>
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/// 创建签名
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/// </summary>
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public static string CreateSign(Dictionary<string, string> parameters, string key)
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{
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var sorted = parameters
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.Where(kv => !string.IsNullOrEmpty(kv.Value) && kv.Key != "sign" && kv.Key != "sign_type")
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.OrderBy(kv => kv.Key)
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.ToList();
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string query = string.Join("&", sorted.Select(kv => $"{kv.Key}={kv.Value}"));
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string toSign = query + key;
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using (var md5 = MD5.Create())
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{
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byte[] hash = md5.ComputeHash(Encoding.UTF8.GetBytes(toSign));
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return BitConverter.ToString(hash).Replace("-", "").ToLower();
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}
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}
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/// <summary>
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/// 发起API支付（返回 json）
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/// </summary>
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public static async Task<EpayResponse?> ApiPayAsync(Dictionary<string, string> parameters, string key,string baseUrl)
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{
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parameters["sign_type"] = "MD5";
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parameters["sign"] = CreateSign(parameters, key);
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using var client = new HttpClient();
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var content = new FormUrlEncodedContent(parameters);
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var response = await client.PostAsync($"{baseUrl}/mapi.php", content);
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return JsonConvert.DeserializeObject<EpayResponse>(await response.Content.ReadAsStringAsync());
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}
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/// <summary>
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/// 校验签名（通常用于异步通知/页面跳转）
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/// </summary>
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public static bool VerifySign(Dictionary<string, string> parameters, string key)
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{
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if (!parameters.TryGetValue("sign", out string originalSign)) return false;
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string newSign = CreateSign(parameters, key);
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return originalSign.Equals(newSign, StringComparison.OrdinalIgnoreCase);
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}
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}
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}
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