Limit Public-Key-Pins max-age to 60 days

net/http/http_security_headers.h

 // Copyright (c) 2012 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 NET_HTTP_HTTP_SECURITY_HEADERS_H_
 #define NET_HTTP_HTTP_SECURITY_HEADERS_H_
 
 #include <stdint.h>
 
 #include <string>
 
 #include "base/time/time.h"
 #include "base/values.h"
 #include "net/base/hash_value.h"
 #include "net/base/net_export.h"
 
 class GURL;
 
 namespace net {
 
 const int64_t kMaxHSTSAgeSecs = 86400 * 365;  // 1 year
+const int64_t kMaxHPKPAgeSecs = 86400 * 60;   // 60 days

[estark, 2016/02/25 21:58:04]

Can you please add a comment above this line with a link to the section in the
RFC that recommends this value?

 
 // Parses |value| as a Strict-Transport-Security header value. If successful,
 // returns true and sets |*max_age| and |*include_subdomains|.
 // Otherwise returns false and leaves the output parameters unchanged.
 //
 // value is the right-hand side of:
 //
 // "Strict-Transport-Security" ":"
 //     [ directive ]  *( ";" [ directive ] )
 bool NET_EXPORT_PRIVATE ParseHSTSHeader(const std::string& value,
@@ skipping 39 matching lines @@
 //     [ ";" "includeSubdomains" ]
 //     [ ";" "report-uri" "=" uri-reference ]
 //
 bool NET_EXPORT_PRIVATE ParseHPKPReportOnlyHeader(const std::string& value,
                                                   bool* include_subdomains,
                                                   HashValueVector* hashes,
                                                   GURL* report_uri);
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_SECURITY_HEADERS_H_