c#的代码有问题

[1111chance]

验签不过

{"ResponseMetadata":{"RequestId":"202410291459145F62E61D5079BEB22FA1","Action":"SendSms","Version":"2020-01-01","Service":"volcSMS","Region":"cn-north-1","Error":{"CodeN":100010,"Code":"SignatureDoesNotMatch","Message":"The request signature we calculated does not match the signature you provided. Check your Secret Access Key and signing method. Consult the service documentation for details."}}}

[1111chance]

正确的代码在这里

using System.Text.Json;
using System.Text;
using Newtonsoft.Json.Linq;
using System.Collections.Immutable;
using System.Collections.Specialized;
using System.Net.Http.Headers;
using System.Security.Cryptography;
using System.Web;

namespace netcore_console
{
internal class Program
{
static void Main(string[] args)
{
var sign = new Sign(region: "cn-beijing",
service: "volcSMS",
schema: "https",
host: "sms.volcengineapi.com",
path: "/",
ak: "ak",
sk: "sk"
);
JObject jopara = new JObject();
jopara["code"] = "8273";
JObject joreq = new JObject();
joreq["SmsAccount"] = "消息组id";
joreq["TemplateID"] = "模版编号";
joreq["PhoneNumbers"] = "电话";
joreq["Sign"] = "签名";
joreq["TemplateParam"] = jopara.ToString();//参数
string str = joreq.ToString(Newtonsoft.Json.Formatting.None);
var resp3 = sign.Request(
method: HttpMethod.Post,
body: str,
contentType: "application/json",
date: DateTimeOffset.Now,
action: "SendSms",
version: "2020-01-01"
);
Console.WriteLine(resp3.Content.ReadAsStringAsync().Result);
}
}
class Sign
{
private readonly string _region;
private readonly string _service;
private readonly string _schema;
private readonly string _host;
private readonly string _path;
private readonly string _ak;
private readonly string _sk;

    private static readonly Encoding Utf8 = Encoding.UTF8;

    private readonly HttpClient _httpClient;

    public Sign(string region, string service, string schema, string host, string path, string ak, string sk)
    {
        _region = region;
        _service = service;
        _schema = schema;
        _host = host;
        _path = path;
        _ak = ak;
        _sk = sk;
        _httpClient = new HttpClient();
    }
    public static string GetSHA256Hash(string input)
    {
        using (SHA256 sha256Hash = SHA256.Create())
        {
            byte[] bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(input));

            StringBuilder builder = new StringBuilder();
            for (int i = 0; i < bytes.Length; i++)
            {
                builder.Append(bytes[i].ToString("x2"));
            }
            return builder.ToString();
        }
    }
    public HttpResponseMessage Request(HttpMethod method,
        string body, string contentType,
        DateTimeOffset date, string action, string version)
    {
      
        if (string.IsNullOrWhiteSpace(contentType))
        {
            contentType = "application/x-www-form-urlencoded";
        }

        string xContentSha256 = GetSHA256Hash(body);
        string xDate = date.UtcDateTime.ToString("yyyyMMdd'T'HHmmss'Z'");
        string shortXDate = xDate[..8];
        string signHeader = "host;x-content-sha256;x-date";

        var realQueryList = new NameValueCollection
        {
            { "Action", action },
            { "Version", version }
        };

        var query = string.Join("&", realQueryList.AllKeys.ToImmutableSortedSet().Select(key =>
        {
            var values = realQueryList.GetValues(key)?.ToImmutableSortedSet() ?? ImmutableSortedSet<string>.Empty;
            return string.Join("&",
                values.Select(value => $"{HttpUtility.UrlEncode(key)}={HttpUtility.UrlEncode(value)}"));
        }));
        string canonicalStringBuilder =
            $"{method}\n" +
            $"{_path}\n" +
            $"{query}\n" +
            $"host:{_host}\n" +
            $"x-content-sha256:{xContentSha256}\n" +
            $"x-date:{xDate}\n" +
            $"\n" +
            $"{signHeader}\n" +
            $"{xContentSha256}";
        string hashCanonicalString = ToHexString(HashSha256(Utf8.GetBytes(canonicalStringBuilder)));
        string credentialScope = $"{shortXDate}/{_region}/{_service}/request";
        string signString = $"HMAC-SHA256\n{xDate}\n{credentialScope}\n{hashCanonicalString}";
        byte[] signKey = GenSigningSecretKeyV4(_sk, shortXDate, _region, _service);
        string signature = ToHexString(HmacSha256(signKey, signString));
        Uri url = new Uri($"{_schema}://{_host}{_path}?{query}");
        var request = new HttpRequestMessage();
        request.Method = method;
        request.RequestUri = url;
        request.Headers.TryAddWithoutValidation("Authorization",
            $"HMAC-SHA256 Credential={_ak}/{credentialScope}, SignedHeaders={signHeader}, Signature={signature}");
        request.Headers.Add("ContentType", "application/json");
        request.Headers.Add("Host", _host);
        request.Headers.Add("X-Content-Sha256", xContentSha256);
        request.Headers.Add("X-Date", xDate);
        request.Content = new StringContent(body, Encoding.UTF8, contentType);

        return _httpClient.Send(request);
    }

    private byte[] GenSigningSecretKeyV4(string secretKey, string date, string region, string service)
    {
        byte[] kDate = HmacSha256(Utf8.GetBytes(secretKey), date);
        byte[] kRegion = HmacSha256(kDate, region);
        byte[] kService = HmacSha256(kRegion, service);
        return HmacSha256(kService, "request");
    }

    private static byte[] HmacSha256(byte[] secret, string text)
    {
        using HMACSHA256 mac = new HMACSHA256(secret);
        var hash = mac.ComputeHash(Encoding.UTF8.GetBytes(text));
        return hash;
    }

    private static byte[] HashSha256(byte[] data)
    {
        using SHA256 sha = SHA256.Create();
        var hash = sha.ComputeHash(data);
        return hash;
    }

    private static string ToHexString(byte[]? bytes)
    {
        if (bytes == null)
        {
            return "";
        }

        StringBuilder sb = new StringBuilder();
        foreach (var t in bytes)
        {
            sb.Append(t.ToString("X2"));
        }

        return sb.ToString().ToLower();
    }
}

}

[1111chance]

上面是.net6版本的代码，
下面给出.netframework的代码
class Sign
{
private readonly string _region;
private readonly string _service;
private readonly string _schema;
private readonly string _host;
private readonly string _path;
private readonly string _ak;
private readonly string _sk;

        private static readonly Encoding Utf8 = Encoding.UTF8;

        private readonly System.Net.Http.HttpClient _httpClient;

        public Sign(string region, string service, string schema, string host, string path, string ak, string sk)
        {
            _region = region;
            _service = service;
            _schema = schema;
            _host = host;
            _path = path;
            _ak = ak;
            _sk = sk;
            _httpClient = new System.Net.Http.HttpClient();
        }
        public static string GetSHA256Hash(string input)
        {
            using (SHA256 sha256Hash = SHA256.Create())
            {
                byte[] bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(input));

                StringBuilder builder = new StringBuilder();
                for (int i = 0; i < bytes.Length; i++)
                {
                    builder.Append(bytes[i].ToString("x2"));
                }
                return builder.ToString();
            }
        }
        public System.Net.Http.HttpResponseMessage Request(System.Net.Http.HttpMethod method,
            string body, string contentType,
            DateTimeOffset date, string action, string version)
        {

            if (string.IsNullOrWhiteSpace(contentType))
            {
                contentType = "application/x-www-form-urlencoded";
            }

            string xContentSha256 = GetSHA256Hash(body);
            string xDate = date.UtcDateTime.ToString("yyyyMMdd'T'HHmmss'Z'");
            string shortXDate = xDate.Substring(0, 8);
            string signHeader = "host;x-content-sha256;x-date";
        
            var query = $"Action={action}&Version={version}";
            string canonicalStringBuilder =
                $"{method}\n" +
                $"{_path}\n" +
                $"{query}\n" +
                $"host:{_host}\n" +
                $"x-content-sha256:{xContentSha256}\n" +
                $"x-date:{xDate}\n" +
                $"\n" +
                $"{signHeader}\n" +
                $"{xContentSha256}";
            string hashCanonicalString = ToHexString(HashSha256(Utf8.GetBytes(canonicalStringBuilder)));
            string credentialScope = $"{shortXDate}/{_region}/{_service}/request";
            string signString = $"HMAC-SHA256\n{xDate}\n{credentialScope}\n{hashCanonicalString}";
            byte[] signKey = GenSigningSecretKeyV4(_sk, shortXDate, _region, _service);
            string signature = ToHexString(HmacSha256(signKey, signString));
            Uri url = new Uri($"{_schema}://{_host}{_path}?{query}");
            var request = new System.Net.Http.HttpRequestMessage();
            request.Method = method;
            request.RequestUri = url;
            request.Headers.TryAddWithoutValidation("Authorization",
                $"HMAC-SHA256 Credential={_ak}/{credentialScope}, SignedHeaders={signHeader}, Signature={signature}");
            request.Headers.Add("ContentType", "application/json");
            request.Headers.Add("Host", _host);
            request.Headers.Add("X-Content-Sha256", xContentSha256);
            request.Headers.Add("X-Date", xDate);
            request.Content = new System.Net.Http.StringContent(body, Encoding.UTF8, contentType);

            return _httpClient.SendAsync(request).Result;
        }

        private byte[] GenSigningSecretKeyV4(string secretKey, string date, string region, string service)
        {
            byte[] kDate = HmacSha256(Utf8.GetBytes(secretKey), date);
            byte[] kRegion = HmacSha256(kDate, region);
            byte[] kService = HmacSha256(kRegion, service);
            return HmacSha256(kService, "request");
        }

        private static byte[] HmacSha256(byte[] secret, string text)
        {
            using (HMACSHA256 mac = new HMACSHA256(secret))
            {
                var hash = mac.ComputeHash(Encoding.UTF8.GetBytes(text));
                return hash;
            }
        }

        private static byte[] HashSha256(byte[] data)
        {
            using (SHA256 sha = SHA256.Create())
            {
                var hash = sha.ComputeHash(data);
                return hash;
            }
        }

        private static string ToHexString(byte[] bytes)
        {
            if (bytes == null)
            {
                return "";
            }

            StringBuilder sb = new StringBuilder();
            foreach (var t in bytes)
            {
                sb.Append(t.ToString("X2"));
            }

            return sb.ToString().ToLower();
        }
    }