WKWebView: Implemented recoverable SSL interstitials.

ios/web/net/cert_verification_cache.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 IOS_WEB_NET_CERT_VERIFICATION_CACHE_H_
+#define IOS_WEB_NET_CERT_VERIFICATION_CACHE_H_
+
+#include <map>
+#include <string>
+
+#include "net/cert/x509_certificate.h"
+
+namespace web {
+
+// Allows caching cert verification data. Key is cert-host pair, value is
+// a template param.
+template <typename ValueType>

[stuartmorgan, 2015/09/23 17:36:09]

Why templated? The actual code only stores one value. Do we expect to use this
for something else in the future?

[Eugene But (OOO till 7-30), 2015/09/23 20:40:47]

Because ValueType (CertStatus, is_recoverable flag pair) is very specific to
WebController and I don't want to make this class depend on workaround  for
incomplete chains. WDYT?

+class CertVerificationCache {
+ public:
+  CertVerificationCache() {}
+  ~CertVerificationCache() {}
+
+  // Retrieves |value| for the given cert-host pair. |cert| cannot be null.
+  // Returns true on success.
+  bool get(const scoped_refptr<net::X509Certificate>& cert,
+           const std::string& host,
+           ValueType* value) const {
+    auto it = map_.find(KeyType(cert, host));
+    if (it == map_.end())
+      return false;
+
+    *value = it->second;
+    return true;
+  }
+
+  // Adds |value| for the given cert-host pair. |cert| cannot be null.
+  void set(const scoped_refptr<net::X509Certificate>& cert,
+           const std::string& host,
+           const ValueType& value) {
+    DCHECK(cert);
+    map_[KeyType(cert, host)] = value;
+  }
+
+  // Clears the cache.
+  void reset() { map_.clear(); }
+
+ private:
+  // Holds cert-host pair and provides less-than comparator.
+  struct KeyType {
+    KeyType(const scoped_refptr<net::X509Certificate>& cert,
+            const std::string& host)
+        : cert(cert), host(host) {}
+
+    bool operator<(const KeyType& other) const {
+      if (host == other.host)
+        return cert_comparator(cert, other.cert);
+      return host < other.host;
+    }
+
+    scoped_refptr<net::X509Certificate> cert;
+    std::string host;
+
+   private:
+    net::X509Certificate::LessThan cert_comparator;
+  };
+
+  std::map<KeyType, ValueType> map_;
+};
+
+}  // namespace web
+
+#endif  // IOS_WEB_NET_CERT_VERIFICATION_CACHE_H_