在C#上生成Apple JWT

using System;
using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using System.Text;
using Microsoft.IdentityModel.Tokens;

public class Program
{
    public static void Main()
    {
        // 设置Apple的Team ID和Key ID
        string teamId = "YOUR_TEAM_ID";
        string keyId = "YOUR_KEY_ID";

        // 读取Apple的私钥内容
        string privateKey = "YOUR_PRIVATE_KEY_CONTENT";

        // 创建JWT的Claims
        var claims = new[]
        {
            new Claim("iss", teamId),
            new Claim("iat", DateTimeOffset.UtcNow.ToUnixTimeSeconds().ToString()),
        };

        // 创建JWT的头部
        var header = new JwtHeader(new SigningCredentials(
            new SymmetricSecurityKey(Encoding.UTF8.GetBytes(privateKey)),
            SecurityAlgorithms.HmacSha256));

        // 创建JWT
        var jwt = new JwtSecurityToken(header, new JwtPayload(claims));

        // 设置JWT的Key ID
        jwt.Header.Add("kid", keyId);

        // 生成JWT字符串
        var jwtHandler = new JwtSecurityTokenHandler();
        string jwtString = jwtHandler.WriteToken(jwt);

        Console.WriteLine(jwtString);
    }
}