Refactor SecurityStateModel/Clients for simplicity and reusability.

components/security_state/core/security_state.h

Index: components/security_state/core/security_state.h
diff --git a/components/security_state/core/security_state.h b/components/security_state/core/security_state.h
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+// 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 COMPONENTS_SECURITY_STATE_SECURITY_STATE_H_
+#define COMPONENTS_SECURITY_STATE_SECURITY_STATE_H_
+
+#include <stdint.h>
+#include <memory>
+
+#include "base/callback.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"
+
+// Provides helper methods and data types that are used to determine the
+// high-level security information about a page or request.
+//
+// SecurityInfo is the main data structure, describing a page's or request's
+// security state. It is computed by the platform-independent GetSecurityInfo()
+// helper method, which receives platform-specific inputs from its callers in
+// the form of a VisibleSecurityState struct.
+namespace security_state {
+
+// 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.components.security_state
+// GENERATED_JAVA_CLASS_NAME_OVERRIDE: ConnectionSecurityLevel
+enum SecurityLevel {
+  // HTTP/no URL/HTTPS but with insecure passive content on the page.
+  NONE,
+
+  // HTTP, in a case where we want to show a visible warning about the page's
+  // lack of security.
+  //
+  // The criteria used to classify pages as NONE vs. HTTP_SHOW_WARNING will
+  // change over time. Eventually, NONE will be eliminated.
+  // See https://crbug.com/647754.
+  HTTP_SHOW_WARNING,
+
+  // 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+  // HTTPS, but with an outdated protocol version.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.
+  SECURE_WITH_POLICY_INSTALLED_CERT,
+
+  // Attempted HTTPS and failed, page not authenticated, HTTPS with
+  // insecure active content on the page, malware, phishing, or any other
+  // serious security issue that could be dangerous.
+  DANGEROUS,
+};
+
+// Describes how the SHA1 deprecation policy applies to an HTTPS
+// connection.
+enum SHA1DeprecationStatus {
+  UNKNOWN_SHA1,
+  // 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,
+};
+
+// The ContentStatus enum is used to describe content on the page that
+// has significantly different security properties than the main page
+// load. Content can be passive content that is displayed (such as
+// images) or active content that is run (such as scripts or iframes).
+enum ContentStatus {
+  CONTENT_STATUS_UNKNOWN,
+  CONTENT_STATUS_NONE,
+  CONTENT_STATUS_DISPLAYED,
+  CONTENT_STATUS_RAN,
+  CONTENT_STATUS_DISPLAYED_AND_RAN,
+};
+
+// Describes the security status of a page or request. This is the
+// main data structure provided by this class. 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.
+struct SecurityInfo {
+  SecurityInfo();
+  ~SecurityInfo();
+  SecurityLevel security_level;
+  // True if the page fails the browser's malware or phishing checks.
+  bool fails_malware_check;
+  SHA1DeprecationStatus sha1_deprecation_status;
+  // |mixed_content_status| describes the presence of content that was
+  // loaded over a nonsecure (HTTP) connection.
+  ContentStatus mixed_content_status;
+  // |content_with_cert_errors_status| describes the presence of
+  // content that was loaded over an HTTPS connection with
+  // certificate errors.
+  ContentStatus content_with_cert_errors_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;
+  scoped_refptr<net::X509Certificate> certificate;
+  // The security strength, in bits, of the SSL cipher suite. In late
+  // 2015, 128 is considered the minimum.
+  //
+  // 0 means the connection uses HTTPS but is not encrypted.  -1 means
+  // the security strength is unknown or the connection does not use
+  // HTTPS.
+  int security_bits;
+  // Information about the SSL connection, such as protocol and
+  // ciphersuite. See ssl_connection_flags.h in net.
+  int connection_status;
+  // The ID of the (EC)DH group used by the key exchange. The value is zero if
+  // unknown (older cache entries may not store the value) or not applicable.
+  uint16_t key_exchange_group;
+  // A mask that indicates which of the protocol version,
+  // key exchange, or cipher for the connection is considered
+  // obsolete. See net::ObsoleteSSLMask for specific mask values.
+  int obsolete_ssl_status;
+
+  // True if pinning was bypassed due to a local trust anchor.
+  bool pkp_bypassed;
+
+  // True if the page displayed sensitive user data inputs (like a
+  // password or credit card) on an HTTP page.
+  bool displayed_private_user_data_input_on_http;
+};
+
+// Contains the security state relevant to computing the SecurityInfo
+// for a page. This is the input to GetSecurityInfo().
+struct VisibleSecurityState {
+  VisibleSecurityState();
+  ~VisibleSecurityState();
+  bool operator==(const VisibleSecurityState& other) const;
+  GURL url;
+
+  // True if the page fails the browser's malware or phishing checks.
+  bool fails_malware_check;
+
+  // CONNECTION SECURITY FIELDS
+  // Whether the connection security fields are initialized.
+  bool connection_info_initialized;
+  // The following fields contain information about the connection
+  // used to load the page or request.
+  scoped_refptr<net::X509Certificate> certificate;
+  net::CertStatus cert_status;
+  int connection_status;
+  // The ID of the (EC)DH group used by the key exchange. The value is zero if
+  // unknown (older cache entries may not store the value) or not applicable.
+  uint16_t key_exchange_group;
+  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;
+  // True if the page displayed passive subresources with certificate errors.
+  bool displayed_content_with_cert_errors;
+  // True if the page ran active subresources with certificate errors.
+  bool ran_content_with_cert_errors;
+  // True if PKP was bypassed due to a local trust anchor.
+  bool pkp_bypassed;
+  // True if the page was an HTTP page that displayed a password field.
+  bool displayed_password_field_on_http;
+  // True if the page was an HTTP page that displayed a credit card field.
+  bool displayed_credit_card_field_on_http;
+};
+
+// 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.
+constexpr SecurityLevel kDisplayedInsecureContentLevel = NONE;
+constexpr SecurityLevel kRanInsecureContentLevel = DANGEROUS;
+
+// Returns true if the given |url|'s origin should be considered secure.
+using IsOriginSecureCallback = base::Callback<bool(const GURL& url)>;
+
+// Populates |result| to describe the current page.
+// |visible_security_state| contains the relevant security state.
+// |used_policy_installed_certificate| indicates whether the page or request
+// is known to be loaded with a certificate installed by the system admin.
+// |is_origin_secure_callback| determines whether a URL's origin should be
+// considered secure.
+void GetSecurityInfo(
+    std::unique_ptr<VisibleSecurityState> visible_security_state,
+    bool used_policy_installed_certificate,
+    IsOriginSecureCallback is_origin_secure_callback,
+    SecurityInfo* result);
+
+}  // namespace security_state
+
+#endif  // COMPONENTS_SECURITY_STATE_SECURITY_STATE_H_