示例#1
0
        public virtual bool HandleAuthChallenge(HttpHost host, HttpResponse response, AuthenticationStrategy
                                                authStrategy, AuthState authState, HttpContext context)
        {
            try
            {
                if (this.log.IsDebugEnabled())
                {
                    this.log.Debug(host.ToHostString() + " requested authentication");
                }
                IDictionary <string, Header> challenges = authStrategy.GetChallenges(host, response
                                                                                     , context);
                if (challenges.IsEmpty())
                {
                    this.log.Debug("Response contains no authentication challenges");
                    return(false);
                }
                AuthScheme authScheme = authState.GetAuthScheme();
                switch (authState.GetState())
                {
                case AuthProtocolState.Failure:
                {
                    return(false);
                }

                case AuthProtocolState.Success:
                {
                    authState.Reset();
                    break;
                }

                case AuthProtocolState.Challenged:
                case AuthProtocolState.Handshake:
                {
                    if (authScheme == null)
                    {
                        this.log.Debug("Auth scheme is null");
                        authStrategy.AuthFailed(host, null, context);
                        authState.Reset();
                        authState.SetState(AuthProtocolState.Failure);
                        return(false);
                    }
                    goto case AuthProtocolState.Unchallenged;
                }

                case AuthProtocolState.Unchallenged:
                {
                    if (authScheme != null)
                    {
                        string id        = authScheme.GetSchemeName();
                        Header challenge = challenges.Get(id.ToLower(CultureInfo.InvariantCulture));
                        if (challenge != null)
                        {
                            this.log.Debug("Authorization challenge processed");
                            authScheme.ProcessChallenge(challenge);
                            if (authScheme.IsComplete())
                            {
                                this.log.Debug("Authentication failed");
                                authStrategy.AuthFailed(host, authState.GetAuthScheme(), context);
                                authState.Reset();
                                authState.SetState(AuthProtocolState.Failure);
                                return(false);
                            }
                            else
                            {
                                authState.SetState(AuthProtocolState.Handshake);
                                return(true);
                            }
                        }
                        else
                        {
                            authState.Reset();
                        }
                    }
                }
                }
                // Retry authentication with a different scheme
                Queue <AuthOption> authOptions = authStrategy.Select(challenges, host, response, context
                                                                     );
                if (authOptions != null && !authOptions.IsEmpty())
                {
                    if (this.log.IsDebugEnabled())
                    {
                        this.log.Debug("Selected authentication options: " + authOptions);
                    }
                    authState.SetState(AuthProtocolState.Challenged);
                    authState.Update(authOptions);
                    return(true);
                }
                else
                {
                    return(false);
                }
            }
            catch (MalformedChallengeException ex)
            {
                if (this.log.IsWarnEnabled())
                {
                    this.log.Warn("Malformed challenge: " + ex.Message);
                }
                authState.Reset();
                return(false);
            }
        }