Wire up certificate policies support in PathBuilder.

components/cast_certificate/cast_cert_validator.cc

 // Copyright 2014 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.
 
 #include "components/cast_certificate/cast_cert_validator.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 158 matching lines @@
     CastDeviceCertPolicy* policy) {
   // Get the Key Usage extension.
   if (!cert->has_key_usage())
     return false;
 
   // Ensure Key Usage contains digitalSignature.
   if (!cert->key_usage().AssertsBit(net::KEY_USAGE_BIT_DIGITAL_SIGNATURE))
     return false;
 
   // Check for an optional audio-only policy extension.
+  //
+  // TODO(eroman): Use |user_constrained_policy_set| that was output from
+  // verification instead. (Checking just the leaf certificate's policy
+  // assertion doesn't take into account policy restrictions on intermediates,
+  // policy constraints/inhibits, or policy re-mappings).
   *policy = CastDeviceCertPolicy::NONE;
   if (cert->has_policy_oids()) {
     const std::vector<net::der::Input>& policies = cert->policy_oids();
     // Look for an audio-only policy. Disregard any other policy found.
     if (std::find(policies.begin(), policies.end(), AudioOnlyPolicyOid()) !=
         policies.end()) {
       *policy = CastDeviceCertPolicy::AUDIO_ONLY;
     }
   }
 
@@ skipping 68 matching lines @@
 
   // Use a signature policy compatible with Cast's PKI.
   auto signature_policy = CreateCastSignaturePolicy();
 
   // Do path building and RFC 5280 compatible certificate verification using the
   // two Cast trust anchors and Cast signature policy.
   net::der::GeneralizedTime verification_time;
   if (!net::der::EncodeTimeAsGeneralizedTime(time, &verification_time))
     return false;
   net::CertPathBuilder::Result result;
-  net::CertPathBuilder path_builder(target_cert.get(), trust_store,
-                                    signature_policy.get(), verification_time,
-                                    net::KeyPurpose::CLIENT_AUTH, &result);
+  net::CertPathBuilder path_builder(
+      target_cert.get(), trust_store, signature_policy.get(), verification_time,
+      net::KeyPurpose::CLIENT_AUTH, net::InitialExplicitPolicy::kFalse,
+      {net::AnyPolicy()}, net::InitialPolicyMappingInhibit::kFalse,
+      net::InitialAnyPolicyInhibit::kFalse, &result);
   path_builder.AddCertIssuerSource(&intermediate_cert_issuer_source);
   path_builder.Run();
   if (!result.HasValidPath()) {
     // TODO(crbug.com/634443): Log error information.
     return false;
   }
 
   // Check properties of the leaf certificate (key usage, policy), and construct
   // a CertVerificationContext that uses its public key.
   if (!CheckTargetCertificate(target_cert.get(), context, policy))
@@ skipping 14 matching lines @@
 
 std::unique_ptr<CertVerificationContext> CertVerificationContextImplForTest(
     const base::StringPiece& spki) {
   // Use a bogus CommonName, since this is just exposed for testing signature
   // verification by unittests.
   return base::MakeUnique<CertVerificationContextImpl>(net::der::Input(spki),
                                                        "CommonName");
 }
 
 }  // namespace cast_certificate