OWIN ASP.NET-如果访问令牌过期，则不能使用刷新令牌生成访问令牌

Question

当我试图在访问令牌过期之前使用刷新令牌生成访问令牌时，系统会生成一个新令牌，并且一切正常。但是如果访问令牌过期，则请求返回invalid_grant。

grantrefreshtoken中的validated()方法不是使用我从以前的访问令牌中存储在字典中的标识生成访问令牌吗？

如果上一个更新令牌尚未过期，如何阻止客户端使用相同的刷新令牌请求新的访问令牌？

public partial class Startup
{
    public void Configuration(IAppBuilder app)
    {
        app.UseOAuthAuthorizationServer(new OAuthAuthorizationServerOptions()
        {
            AllowInsecureHttp = true,

            TokenEndpointPath = new PathString("/token"),
            AccessTokenExpireTimeSpan = TimeSpan.FromMinutes(5),

            Provider = new OAuthProvider(),
            RefreshTokenProvider = new RefreshTokenProvider()
        });
        app.UseOAuthBearerAuthentication(new OAuthBearerAuthenticationOptions());
        app.UseWebApi(config);
    }
}

oauthProvider.cs：

public class OAuthProvider : OAuthAuthorizationServerProvider
{
    public override Task ValidateClientAuthentication(OAuthValidateClientAuthenticationContext context)
    {
        context.Validated();
        return Task.FromResult<object>(null);
    }

    public override Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
    {
        if (context.UserName == "admin" && context.Password == "123456")
        {
            var claimsIdentity = new ClaimsIdentity(context.Options.AuthenticationType);
            claimsIdentity.AddClaim(new Claim(ClaimTypes.Name, context.UserName));
            claimsIdentity.AddClaim(new Claim(ClaimTypes.Role, "Admin"));

            var ticket = new AuthenticationTicket(claimsIdentity, null);
            context.Validated(ticket);
        }
        return Task.FromResult<object>(null);
    }

    public override Task GrantRefreshToken(OAuthGrantRefreshTokenContext context)
    {
        context.Validated(context.Ticket);
        return Task.FromResult<object>(null);
    }
}

RefreshTokenProvider.cs：

public class RefreshTokenProvider : AuthenticationTokenProvider
{
    private static ConcurrentDictionary<string, AuthenticationTicket> _refreshTokens = new ConcurrentDictionary<string, AuthenticationTicket>();

    public override Task CreateAsync(AuthenticationTokenCreateContext context)
    {
        var guid = Guid.NewGuid().ToString();
        _refreshTokens.TryAdd(guid, context.Ticket);

        context.SetToken(guid);
        return Task.FromResult<object>(null);
    }

    public override Task ReceiveAsync(AuthenticationTokenReceiveContext context)
    {
        if (_refreshTokens.TryRemove(context.Token, out AuthenticationTicket ticket))
        {
            context.SetTicket(ticket);
        }
        return Task.FromResult<object>(null);
    }
}

对不起，英语不好，希望你能理解！

public class OAuthProvider : OAuthAuthorizationServerProvider
{
    public override Task ValidateClientAuthentication(OAuthValidateClientAuthenticationContext context)
    {
        context.Validated();
        return Task.FromResult<object>(null);
    }

    public override Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
    {
        try
        {
            var account = AccountRepository.Instance.GetByUsername(context.UserName);
            if (account != null && Global.VerifyHash(context.Password, account.Password))
            {
                var claimsIdentity = new ClaimsIdentity(context.Options.AuthenticationType);
                claimsIdentity.AddClaim(new Claim(ClaimTypes.Name, account.Username));
                claimsIdentity.AddClaim(new Claim("DriverId", account.DriverId.ToString()));

                var newTicket = new AuthenticationTicket(claimsIdentity, null);
                context.Validated(newTicket);
            }
        }
        catch { }

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

    public override Task GrantRefreshToken(OAuthGrantRefreshTokenContext context)
    {
        context.Validated();
        return Task.FromResult<object>(null);
    }
}

public class RefreshTokenProvider : AuthenticationTokenProvider
{
    public override Task CreateAsync(AuthenticationTokenCreateContext context)
    {
        var refreshToken = new TokenModel()
        {
            Subject = context.Ticket.Identity.Name,
            Token = GenerateToken(),
            IssuedUtc = DateTime.UtcNow,
            ExpiresUtc = DateTime.UtcNow.AddMinutes(5)
        };

        context.Ticket.Properties.IssuedUtc = refreshToken.IssuedUtc;
        context.Ticket.Properties.ExpiresUtc = refreshToken.ExpiresUtc;

        refreshToken.Ticket = context.SerializeTicket();

        try
        {
            TokenRepository.Instance.Insert(refreshToken);
            context.SetToken(refreshToken.Token);
        }
        catch { }

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

    public override Task ReceiveAsync(AuthenticationTokenReceiveContext context)
    {
        try
        {
            var refreshToken = TokenRepository.Instance.Get(context.Token);
            if (refreshToken != null)
            {
                if (TokenRepository.Instance.Delete(refreshToken))
                {
                    context.DeserializeTicket(refreshToken.Ticket);
                }
            }
        }
        catch { }

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

    private string GenerateToken()
    {
        HashAlgorithm hashAlgorithm = new SHA256CryptoServiceProvider();

        byte[] byteValue = Encoding.UTF8.GetBytes(Guid.NewGuid().ToString("N"));
        byte[] byteHash = hashAlgorithm.ComputeHash(byteValue);

        return Convert.ToBase64String(byteHash);
    }
}

Answer 1

似乎刷新令牌与访问令牌具有相同的过期时间。因此，您需要延长刷新令牌的过期时间：

public override Task CreateAsync(AuthenticationTokenCreateContext context)
{
    var form = context.Request.ReadFormAsync().Result;
    var grantType = form.GetValues("grant_type");

    if (grantType[0] != "refresh_token")
    {
        ...

        // One day
        int expire = 24 * 60 * 60;
        context.Ticket.Properties.ExpiresUtc = new DateTimeOffset(DateTime.Now.AddSeconds(expire));
    }
    base.Create(context);
}

--更新--

我已经更新了代码来回答您评论中的问题。比你要求的要多。但我想解释一下会有帮助。