Pull SecurityStateModel out into a component

chrome/browser/ssl/security_state_model.h

-// Copyright 2015 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 CHROME_BROWSER_SSL_SECURITY_STATE_MODEL_H_
-#define CHROME_BROWSER_SSL_SECURITY_STATE_MODEL_H_
-
-#include "base/macros.h"
-#include "net/cert/cert_status_flags.h"
-#include "net/cert/sct_status_flags.h"
-#include "net/cert/x509_certificate.h"
-#include "url/gurl.h"
-
-class Profile;
-class SecurityStateModelClient;
-
-// SecurityStateModel provides high-level security information about a
-// page or request.
-//
-// SecurityStateModel::SecurityInfo is the main data structure computed
-// by a SecurityStateModel. SecurityInfo contains a SecurityLevel (which
-// is a single value describing the overall security state) along with
-// information that a consumer might want to display in UI to explain or
-// elaborate on the SecurityLevel.
-class SecurityStateModel {
- public:
-  // Describes the overall security state of the page.
-  //
-  // If you reorder, add, or delete values from this enum, you must also
-  // update the UI icons in ToolbarModelImpl::GetIconForSecurityLevel.
-  //
-  // A Java counterpart will be generated for this enum.
-  // GENERATED_JAVA_ENUM_PACKAGE: org.chromium.chrome.browser.ssl
-  // GENERATED_JAVA_CLASS_NAME_OVERRIDE: ConnectionSecurityLevel
-  enum SecurityLevel {
-    // HTTP/no URL/HTTPS but with insecure passive content on the page
-    NONE,
-
-    // HTTPS with valid EV cert
-    EV_SECURE,
-
-    // HTTPS (non-EV) with valid cert
-    SECURE,
-
-    // HTTPS, but with an outdated protocol version
-    SECURITY_WARNING,
-
-    // HTTPS, but the certificate verification chain is anchored on a
-    // certificate that was installed by the system administrator
-    SECURITY_POLICY_WARNING,
-
-    // Attempted HTTPS and failed, page not authenticated, or HTTPS with
-    // insecure active content on the page
-    SECURITY_ERROR,
-  };
-
-  // Describes how the SHA1 deprecation policy applies to an HTTPS
-  // connection.
-  enum SHA1DeprecationStatus {
-    // No SHA1 deprecation policy applies.
-    NO_DEPRECATED_SHA1,
-    // The connection used a certificate with a SHA1 signature in the
-    // chain, and policy says that the connection should be treated with a
-    // warning.
-    DEPRECATED_SHA1_MINOR,
-    // The connection used a certificate with a SHA1 signature in the
-    // chain, and policy says that the connection should be treated as
-    // broken HTTPS.
-    DEPRECATED_SHA1_MAJOR,
-  };
-
-  // Describes the type of mixed content (if any) that a site
-  // displayed/ran.
-  enum MixedContentStatus {
-    NO_MIXED_CONTENT,
-    // The site displayed insecure resources (passive mixed content).
-    DISPLAYED_MIXED_CONTENT,
-    // The site ran insecure code (active mixed content).
-    RAN_MIXED_CONTENT,
-    // The site both ran and displayed insecure resources.
-    RAN_AND_DISPLAYED_MIXED_CONTENT,
-  };
-
-  // Describes the security status of a page or request. This is the
-  // main data structure provided by this class.
-  struct SecurityInfo {
-    SecurityInfo();
-    ~SecurityInfo();
-    SecurityLevel security_level;
-    SHA1DeprecationStatus sha1_deprecation_status;
-    MixedContentStatus mixed_content_status;
-    // The verification statuses of the signed certificate timestamps
-    // for the connection.
-    std::vector<net::ct::SCTVerifyStatus> sct_verify_statuses;
-    bool scheme_is_cryptographic;
-    net::CertStatus cert_status;
-    int cert_id;
-    // The security strength, in bits, of the SSL cipher suite. In late
-    // 2015, 128 is considered the minimum.
-    // 0 means the connection is not encrypted.
-    // -1 means the security strength is unknown.
-    int security_bits;
-    // Information about the SSL connection, such as protocol and
-    // ciphersuite. See ssl_connection_flags.h in net.
-    int connection_status;
-    // True if the protocol version and ciphersuite for the connection
-    // are considered secure.
-    bool is_secure_protocol_and_ciphersuite;
-  };
-
-  // Contains the security state relevant to computing the SecurityInfo
-  // for a page. This is the input to GetSecurityInfo() provided by the
-  // model's client.
-  struct VisibleSecurityState {
-    VisibleSecurityState();
-    ~VisibleSecurityState();
-    bool operator==(const VisibleSecurityState& other) const;
-    bool initialized;
-    GURL url;
-    // The baseline SecurityLevel describing the page or request before
-    // any SecurityStateModel policies have been applied.
-    SecurityLevel initial_security_level;
-    // The following fields contain information about the connection
-    // used to load the page or request.
-    int cert_id;
-    net::CertStatus cert_status;
-    int connection_status;
-    int security_bits;
-    // The verification statuses of the Signed Certificate
-    // Timestamps (if any) that the server provided.
-    std::vector<net::ct::SCTVerifyStatus> sct_verify_statuses;
-    // True if the page displayed passive mixed content.
-    bool displayed_mixed_content;
-    // True if the page ran active mixed content.
-    bool ran_mixed_content;
-  };
-
-  // These security levels describe the treatment given to pages that
-  // display and run mixed content. They are used to coordinate the
-  // treatment of mixed content with other security UI elements.
-  static const SecurityLevel kDisplayedInsecureContentLevel;
-  static const SecurityLevel kRanInsecureContentLevel;
-
-  SecurityStateModel();
-  virtual ~SecurityStateModel();
-
-  // Returns a SecurityInfo describing the current page. Results are
-  // cached so that computation is only done when the relevant security
-  // state has changed.
-  const SecurityInfo& GetSecurityInfo() const;
-
-  void SetClient(SecurityStateModelClient* client);
-
- private:
-  // Caches the SecurityInfo for the visible page. Marked
-  // mutable so that the const accessor GetSecurityInfo() can update the
-  // cached values.
-  mutable SecurityInfo security_info_;
-  mutable VisibleSecurityState visible_security_state_;
-
-  SecurityStateModelClient* client_;
-
-  DISALLOW_COPY_AND_ASSIGN(SecurityStateModel);
-};
-
-#endif  // CHROME_BROWSER_SSL_SECURITY_STATE_MODEL_H_