OWIN的oAuth中ValidateClientAuthentication方法和GrantResourceOwnerCredentials方法有什么区别？

Question

我是.NET的oauth和owin的初学者.我试图了解这些方法的ValidateClientAuthentication方法和GrantResourceOwnerCredentials方法.我了解GrantResourceOwnerCredentials方法可用于验证凭据并生成令牌.然后,方法ValidateClientAuthentication()的目的是什么.请指导我这件事.非常感谢.

 public override Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
        {
            return Task.Factory.StartNew(() =>
            {
                var userName = context.UserName;
                var password = context.Password;
                var userService = new UserService(); // our created one
                var user = userService.ValidateUser(userName, password);
                if (user != null)
                {
                    var claims = new List<Claim>()
                    {
                        new Claim(ClaimTypes.Sid, Convert.ToString(user.Id)),
                        new Claim(ClaimTypes.Name, user.Name),
                        new Claim(ClaimTypes.Email, user.Email)
                    };
                    ClaimsIdentity oAuthIdentity = new ClaimsIdentity(claims,Startup.OAuthOptions.AuthenticationType);


                    var properties = CreateProperties(user.Name);
                    var ticket = new AuthenticationTicket(oAuthIdentity, properties);
                    context.Validated(ticket);
                }
                else
                {
                    context.SetError("invalid_grant", "The user name or password is incorrect");
                }
            });
        }
        #endregion

        #region[ValidateClientAuthentication]
        public override Task ValidateClientAuthentication(OAuthValidateClientAuthenticationContext context)
        {
            if (context.ClientId == null)
                context.Validated();

            return Task.FromResult<object>(null);
        }
        #endregion

Answer 1

这与OAuth 2.0规范中的客户端凭据流与资源所有者密码凭据流相关

请记住,客户端和资源所有者是OAuth下的不同实体.客户端代表资源所有者发出请求.

实际上,当您希望接受实际的用户名和密码并发出访问令牌时,您可能希望使用GrantResourceOwnerCredentials.

应该使用ValidateClientAuthentication来确保客户端是它所说的.如果已将客户端注册到授权服务器并且需要验证它是否仍然有效,那么您可能会这样做.

我见过的大多数代码示例只是调用context.Validated(),就像你在样本中所做的那样.我找到了一篇博客文章,其中包含一个更深入的代码示例.请在此处查看:http://bitoftech.net/2014/10/27/json-web-token-asp-net-web-api-2-jwt-owin-authorization-server/