text: // Copyright 2014 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef REMOTING_HOST_TOKEN_VALIDATOR_BASE_H_
  #define REMOTING_HOST_TOKEN_VALIDATOR_BASE_H_
  
  #include "base/callback.h"
  #include "base/memory/weak_ptr.h"
  #include "net/url_request/url_request.h"
  #include "net/url_request/url_request_context_getter.h"
  #include "remoting/protocol/token_validator.h"
  #include "url/gurl.h"
  
  namespace net {
  class ClientCertStore;
  typedef std::vector<scoped_refptr<X509Certificate> > CertificateList;
  }
  
  namespace remoting {
  
  struct ThirdPartyAuthConfig {
    inline bool is_empty() const {
      return token_url.is_empty() && token_validation_url.is_empty();
    }
  
    inline bool is_valid() const {
      return token_url.is_valid() && token_validation_url.is_valid();
    }
  
    GURL token_url;
    GURL token_validation_url;
    std::string token_validation_cert_issuer;
  };
  
  class TokenValidatorBase
      : public net::URLRequest::Delegate,
        public protocol::TokenValidator {
   public:
    TokenValidatorBase(
        const ThirdPartyAuthConfig& third_party_auth_config,
        const std::string& token_scope,
        scoped_refptr<net::URLRequestContextGetter> request_context_getter);
    virtual ~TokenValidatorBase();
  
    // TokenValidator interface.
    virtual void ValidateThirdPartyToken(
        const std::string& token,
        const base::Callback<void(
            const std::string& shared_secret)>& on_token_validated) OVERRIDE;
  
    virtual const GURL& token_url() const OVERRIDE;
    virtual const std::string& token_scope() const OVERRIDE;
  
    // URLRequest::Delegate interface.
    virtual void OnResponseStarted(net::URLRequest* source) OVERRIDE;
    virtual void OnReadCompleted(net::URLRequest* source,
                                 int bytes_read) OVERRIDE;
    virtual void OnCertificateRequested(
        net::URLRequest* source,
        net::SSLCertRequestInfo* cert_request_info) OVERRIDE;
  
   protected:
    void OnCertificatesSelected(net::CertificateList* selected_certs,
                                net::ClientCertStore* unused);
  
    virtual void StartValidateRequest(const std::string& token) = 0;
    virtual bool IsValidScope(const std::string& token_scope);
    std::string ProcessResponse();
  
    // Constructor parameters.
    ThirdPartyAuthConfig third_party_auth_config_;
    std::string token_scope_;
    scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
  
    // URLRequest related fields.
    scoped_ptr<net::URLRequest> request_;
    scoped_refptr<net::IOBuffer> buffer_;
    std::string data_;
  
    base::Callback<void(const std::string& shared_secret)> on_token_validated_;
  
    base::WeakPtrFactory<TokenValidatorBase> weak_factory_;
  
    DISALLOW_COPY_AND_ASSIGN(TokenValidatorBase);
  };
  
  }  // namespace remoting
  
  #endif  // REMOTING_HOST_TOKEN_VALIDATOR_BASE_H
  