/// <summary>
        /// Creates the refresh token.
        /// </summary>
        /// <param name="accessToken">The access token.</param>
        /// <param name="client">The client.</param>
        /// <returns>
        /// The refresh token handle
        /// </returns>
        public async Task<string> CreateRefreshTokenAsync(Token accessToken, Client client)
        {
            Logger.Debug("Creating refresh token");

            int lifetime;
            if (client.RefreshTokenExpiration == TokenExpiration.Absolute)
            {
                Logger.Debug("Setting an absolute lifetime: " + client.AbsoluteRefreshTokenLifetime);
                lifetime = client.AbsoluteRefreshTokenLifetime;
            }
            else
            {
                Logger.Debug("Setting a sliding lifetime: " + client.SlidingRefreshTokenLifetime);
                lifetime = client.SlidingRefreshTokenLifetime;
            }

            var handle = CryptoRandom.CreateUniqueId();
            var refreshToken = new RefreshToken
            {
                ClientId = client.ClientId,
                CreationTime = DateTimeOffset.UtcNow,
                LifeTime = lifetime,
                AccessToken = accessToken
            };

            await _store.StoreAsync(handle, refreshToken);
            return handle;
        }
        public async Task Expired_RefreshToken()
        {
            var refreshToken = new RefreshToken
            {
                AccessToken = new Token("access_token") { Client = new Client() { ClientId = "roclient" } },
                LifeTime = 10,
                CreationTime = DateTimeOffset.UtcNow.AddSeconds(-15)
            };
            var handle = Guid.NewGuid().ToString();

            var store = new InMemoryRefreshTokenStore();
            await store.StoreAsync(handle, refreshToken);

            var client = await _clients.FindClientByIdAsync("roclient");

            var validator = Factory.CreateTokenRequestValidator(
                refreshTokens: store);

            var parameters = new NameValueCollection();
            parameters.Add(Constants.TokenRequest.GrantType, "refresh_token");
            parameters.Add(Constants.TokenRequest.RefreshToken, handle);

            var result = await validator.ValidateRequestAsync(parameters, client);

            result.IsError.Should().BeTrue();
            result.Error.Should().Be(Constants.TokenErrors.InvalidGrant);
        }
        public async Task Valid_RefreshToken_Request_using_Restricted_Client()
        {
            var mock = new Mock<IUserService>();
            mock.Setup(u => u.IsActiveAsync(It.IsAny<ClaimsPrincipal>())).Returns(Task.FromResult(true));

            var subjectClaim = new Claim(Constants.ClaimTypes.Subject, "foo");

            var refreshToken = new RefreshToken
            {
                AccessToken = new Token("access_token")
                {
                    Claims = new List<Claim> { subjectClaim },
                    Client = new Client { ClientId = "roclient_restricted_refresh"}
                },
                
                LifeTime = 600,
                CreationTime = DateTimeOffset.UtcNow
            };
            var handle = Guid.NewGuid().ToString();

            var store = new InMemoryRefreshTokenStore();
            await store.StoreAsync(handle, refreshToken);

            var client = await _clients.FindClientByIdAsync("roclient_restricted_refresh");

            var validator = Factory.CreateTokenRequestValidator(
                refreshTokens: store,
                userService: mock.Object);

            var parameters = new NameValueCollection();
            parameters.Add(Constants.TokenRequest.GrantType, "refresh_token");
            parameters.Add(Constants.TokenRequest.RefreshToken, handle);

            var result = await validator.ValidateRequestAsync(parameters, client);

            result.IsError.Should().BeFalse();
        }
        /// <summary>
        /// Stores the data.
        /// </summary>
        /// <param name="key">The key.</param>
        /// <param name="value">The value.</param>
        /// <returns></returns>
        public Task StoreAsync(string key, RefreshToken value)
        {
            _repository[key] = value;

            return Task.FromResult<object>(null);
        }
        /// <summary>
        /// Updates the refresh token.
        /// </summary>
        /// <param name="handle">The handle.</param>
        /// <param name="refreshToken">The refresh token.</param>
        /// <param name="client">The client.</param>
        /// <returns>
        /// The refresh token handle
        /// </returns>
        public async Task<string> UpdateRefreshTokenAsync(string handle, RefreshToken refreshToken, Client client)
        {
            Logger.Debug("Updating refresh token");

            bool needsUpdate = false;

            if (client.RefreshTokenUsage == TokenUsage.OneTimeOnly)
            {
                Logger.Debug("Token usage is one-time only. Generating new handle");

                // generate new handle
                needsUpdate = true;
            }

            if (client.RefreshTokenExpiration == TokenExpiration.Sliding)
            {
                Logger.Debug("Refresh token expiration is sliding - extending lifetime");

                // make sure we don't exceed absolute exp
                // cap it at absolute exp
                var currentLifetime = refreshToken.CreationTime.GetLifetimeInSeconds();
                Logger.Debug("Current lifetime: " + currentLifetime.ToString());

                var newLifetime = currentLifetime + client.SlidingRefreshTokenLifetime;
                Logger.Debug("New lifetime: " + newLifetime.ToString());

                if (newLifetime > client.AbsoluteRefreshTokenLifetime)
                {
                    newLifetime = client.AbsoluteRefreshTokenLifetime;
                    Logger.Debug("New lifetime exceeds absolute lifetime, capping it to " + newLifetime.ToString());
                }

                refreshToken.LifeTime = newLifetime;
                needsUpdate = true;
            }

            if (needsUpdate)
            {
                // delete old one
                await _store.RemoveAsync(handle);

                // create new one
                string newHandle = CryptoRandom.CreateUniqueId();
                await _store.StoreAsync(newHandle, refreshToken);

                Logger.Debug("Updated refresh token in store");
                return newHandle;
            }

            Logger.Debug("No updates to refresh token done");
            return handle;
        }
 /// <summary>
 /// Raises the refresh token refreshed event.
 /// </summary>
 /// <param name="oldHandle">The old handle.</param>
 /// <param name="newHandle">The new handle.</param>
 /// <param name="token">The token.</param>
 protected void RaiseRefreshTokenRefreshedEvent(string oldHandle, string newHandle, RefreshToken token)
 {
     _events.RaiseSuccessfulRefreshTokenRefreshEvent(oldHandle, newHandle, token);
 }
 /// <summary>
 /// Raises the refresh token issued event.
 /// </summary>
 /// <param name="handle">The handle.</param>
 /// <param name="token">The token.</param>
 protected void RaiseRefreshTokenIssuedEvent(string handle, RefreshToken token)
 {
     _events.RaiseRefreshTokenIssuedEvent(handle, token);
 }
        private async Task<ValidatedTokenRequest> CreateValidatedRequest(Client client, IRefreshTokenStore store)
        {
            var refreshToken = new RefreshToken
            {
                AccessToken = new Token("access_token"),
                ClientId = client.ClientId,
                LifeTime = 600,
                CreationTime = DateTime.UtcNow
            };
            var handle = Guid.NewGuid().ToString();

            await store.StoreAsync(handle, refreshToken);

            var validator = Factory.CreateTokenRequestValidator(
                refreshTokens: store);

            var parameters = new NameValueCollection();
            parameters.Add(Constants.TokenRequest.GrantType, "refresh_token");
            parameters.Add(Constants.TokenRequest.RefreshToken, handle);

            var result = await validator.ValidateRequestAsync(parameters, client);

            result.IsError.Should().BeFalse();
            return validator.ValidatedRequest;
        }
        public async Task Client_has_no_OfflineAccess_Scope_anymore_at_RefreshToken_Request()
        {
            var refreshToken = new RefreshToken
            {
                AccessToken = new Token("access_token"),
                ClientId = "roclient_restricted",
                LifeTime = 600,
                CreationTime = DateTime.UtcNow
            };
            var handle = Guid.NewGuid().ToString();

            var store = new InMemoryRefreshTokenStore();
            await store.StoreAsync(handle, refreshToken);

            var client = await _clients.FindClientByIdAsync("roclient_restricted");

            var validator = Factory.CreateTokenRequestValidator(
                refreshTokens: store);

            var parameters = new NameValueCollection();
            parameters.Add(Constants.TokenRequest.GrantType, "refresh_token");
            parameters.Add(Constants.TokenRequest.RefreshToken, handle);

            var result = await validator.ValidateRequestAsync(parameters, client);

            result.IsError.Should().BeTrue();
            result.Error.Should().Be(Constants.TokenErrors.InvalidGrant);
        }