.net Standard 用 jwt 生成 token 加密和解密的代码-Go服务器开发

以下是使用 .NET Standard 和 JWT 生成和解密令牌的代码示例：

生成JWT Token：

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

public static string GenerateToken(string secretKey, string issuer, string audience)
{
    var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(secretKey));
    var credentials = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);

    var claims = new[] {
        new Claim(ClaimTypes.NameIdentifier, "1234"),
        new Claim(ClaimTypes.Role, "Admin")
    };

    var token = new JwtSecurityToken(
        issuer: issuer,
        audience: audience,
        claims: claims,
        expires: DateTime.UtcNow.AddDays(7),
        signingCredentials: credentials
    );

    return new JwtSecurityTokenHandler().WriteToken(token);
}

解密JWT Token：

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

public static ClaimsPrincipal ValidateToken(string token, string secretKey, string issuer, string audience)
{
    var validationParameters = new TokenValidationParameters
    {
        ValidateIssuerSigningKey = true,
        IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(secretKey)),
        ValidateIssuer = true,
        ValidIssuer = issuer,
        ValidateAudience = true,
        ValidAudience = audience,
        ValidateLifetime = true,
    };

    var handler = new JwtSecurityTokenHandler();
    ClaimsPrincipal principal;

    try
    {
       principal= handler.ValidateToken(token, validationParameters, out _);
       
       // You can access the claims of the token using:
       //principal.Claims

       return principal;
   }
   catch (Exception ex)
   {
       // Token validation failed
       return null;
   }
}

请注意，要使用 JWT 进行身份验证，您需要安全地存储密钥和其他敏感信息，并仅将加密的 token 发送到客户端。