Introduce the ability to require CT for specific hosts

net/base/net_error_list.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.
 
 // This file intentionally does not have header guards, it's included
 // inside a macro to generate enum values.
 
 // This file contains the list of network errors.
 
 //
@@ skipping 338 matching lines @@
 // Resolving a hostname to an IP address list included the IPv4 address
 // "127.0.53.53". This is a special IP address which ICANN has recommended to
 // indicate there was a name collision, and alert admins to a potential
 // problem.
 NET_ERROR(ICANN_NAME_COLLISION, -166)
 
 // The SSL server presented a certificate which could not be decoded. This is
 // not a certificate error code as no X509Certificate object is available. This
 // error is fatal.
 NET_ERROR(SSL_SERVER_CERT_BAD_FORMAT, -167)
+
 // Certificate Transparency: Received a signed tree head that failed to parse.
 NET_ERROR(CT_STH_PARSING_FAILED, -168)
+
 // Certificate Transparency: Received a signed tree head whose JSON parsing was
 // OK but was missing some of the fields.
 NET_ERROR(CT_STH_INCOMPLETE, -169)
 
 // The attempt to reuse a connection to send proxy auth credentials failed
 // before the AuthController was used to generate credentials. The caller should
 // reuse the controller with a new connection. This error is only used
 // internally by the network stack.
 NET_ERROR(UNABLE_TO_REUSE_CONNECTION_FOR_PROXY_AUTH, -170)
 
 // Certificate Transparency: Failed to parse the received consistency proof.
 NET_ERROR(CT_CONSISTENCY_PROOF_PARSING_FAILED, -171)
 
+// Certificate Transparency was required for this connection, but the server
+// did not provide CT information that complied with the policy.
+NET_ERROR(SSL_CERTIFICATE_TRANSPARENCY_REQUIRED, -172)

[mmenke, 2016/06/18 00:59:28]

Should there be error page text for this, reusing the text from one of the other
cert errors maybe, rather than showing a generic ERR_FAILED page?

+
 // Certificate error codes
 //
 // The values of certificate error codes must be consecutive.
 
 // The server responded with a certificate whose common name did not match
 // the host name.  This could mean:
 //
 // 1. An attacker has redirected our traffic to their server and is
 //    presenting a certificate for which they know the private key.
 //
@@ skipping 440 matching lines @@
 NET_ERROR(DNS_TIMED_OUT, -803)
 
 // The entry was not found in cache, for cache-only lookups.
 NET_ERROR(DNS_CACHE_MISS, -804)
 
 // Suffix search list rules prevent resolution of the given host name.
 NET_ERROR(DNS_SEARCH_EMPTY, -805)
 
 // Failed to sort addresses according to RFC3484.
 NET_ERROR(DNS_SORT_ERROR, -806)